Http VB.NET Reference Documentation

Http

Class for sending HTTP requests and receiving server responses.

  • Supports GET, POST, HEAD, PUT, DELETE, WebDav, and custom HTTP request methods.
  • HTTP Authentication: Basic, NTLM, Digest, Negotiate
  • HTTPS (SSL/TLS) with client-side certificate capabilities.
  • Cookie caching, auto-resend, persisting to XML files.
  • Content caching.
  • Supports HTTP proxies
  • Auto-follow redirects if desired.
  • Amazon S3 methods.
  • XML HTTP Request
  • HTTP file upload capabilities
  • Asynchronous features -- putting HTTP requests in background threads.
  • Supports SOCK5/SOCKS4 proxies.
  • IPv6 capable.

Object Creation

Dim obj As New Chilkat.Http()

Properties

AbortCurrent As Boolean

Introduced in version 9.5.0.58

When set to True, causes the currently running method to abort. Methods that always finish quickly (i.e.have no length file operations or network communications) are not affected. If no method is running, then this property is automatically reset to False when the next method is called. When the abort occurs, this property is reset to False. Both synchronous and asynchronous method calls can be aborted. (A synchronous method call could be aborted by setting this property from a separate thread.)

Accept As String

The Accept header field to be automatically included with GET requests issued by QuickGet or QuickGetStr. The default value is "*/*".

AcceptCharset As String

The AcceptCharset header field to be automatically included with GET requests issued by QuickGet or QuickGetStr. The default value is "ISO-8859-1,utf-8;q=0.7,*;q=0.7".

AcceptLanguage As String

The AcceptLanguage header field to be automatically included with GET requests issued by QuickGet or QuickGetStr. The default value is "en-us,en;q=0.5".

AllowGzip As Boolean

Controls whether the "Accept-Encoding: gzip" header is added to HTTP requests sent via any method that sends an HTTP request without using the HttpRequest object (such as QuickGetStr). If False, then the empty Accept-Encoding header is added which means the server response should contain the uncompressed content. The default value is True, which means the server, if it chooses, may send a gzipped response.

AllowHeaderFolding As Boolean

Introduced in version 9.5.0.63

If this property is set to False, then no MIME header folding will be automatically applied to any request header. The default is True.

AuthToken As String

Introduced in version 9.5.0.67

If set, then automatically adds the "Authorization: Bearer " header to all requests.

AutoAddHostHeader As Boolean

If set to true, the "Host" header field will automatically be added to the request header for any QuickGet or QuickGetStr method calls. The value of the Host header field is taken from the hostname part of the URL passed to QuickGet/QuickGetStr.

AwsAccessKey As String

The AWS Access Key to be used with the Amazon S3 methods listed below.

AwsEndpoint As String

The regional endpoint (domain) to be used for Amazon S3 method calls. The default value is "s3.amazonaws.com". This can be set to any valid Amazon S3 endpoint, such as "s3-eu-west-1.amazonaws.com", or the endpoints for S3-API compatible services from other different providers.

AwsRegion As String

Introduced in version 9.5.0.56

The AWS (S3) region, such as "us-east-1", "us-west-2", "eu-west-1", "eu-central-1", etc. This propery defaults to "us-east-1". It is only used when the AwsSignatureVersion property is set to 4. When the AwsSignatureVersion property is set to 2, then this property is unused.

AwsSecretKey As String

The AWS Secret Key to be used with the Amazon S3 methods listed below.

AwsSignatureVersion As Integer

Introduced in version 9.5.0.56

Selects the AWS Signature Version algorithm. The default value is 2. May be set to 4 to select AWS Signature Version 4.

AwsSubResources As String

The AWS sub-resources to be used with the Amazon S3 methods listed below.

If the S3 request needs to address a sub-resource, like ?versioning, ?policy, ?location, ?acl, or ?torrent, or ?versionid append the sub-resource and its value if it has one. Note that in case of multiple sub-resources, sub-resources must be lexicographically sorted by sub-resource name and separated by '&'. e.g. "acl&versionId=value"

The list of sub-resources that can be included are: acl, location, logging, notification, partNumber, policy, requestPayment, torrent, uploadId, uploads, versionId, versioning, versions and website.

BandwidthThrottleDown As Integer

Introduced in version 9.5.0.49

If non-zero, limits (throttles) the download bandwidth to approximately this maximum number of bytes per second. The default value of this property is 0.

BandwidthThrottleUp As Integer

Introduced in version 9.5.0.49

If non-zero, limits (throttles) the upload bandwidth to approximately this maximum number of bytes per second. The default value of this property is 0.

BasicAuth As Boolean

If HTTP basic authentication is needed, this property must be set to True. The HTTP protocol allows for several different types of authentication schemes, such as NTLM, Digest, OAuth1, etc. A given server will support (or allow) certain authentication schemes (also known as authentication methods). Except for the "Basic" authentication method, the other forms of authentication do not involve sending the login and password in plain unencrypted text over the connection. The Basic authentication method is insecure in that it sends the login/password for all to see. If the connection is SSL/TLS, then this might be considered OK. Chilkat takes the safe approach and will not allow Basic authentication unless this property has been explicitly set to True. The default value of this property is False.

Note: It is not required to know the authentication methods accepted by the server beforehand (except for the case of Basic authentication). When authentication is required, Chilkat will first send the request without the Authorization header, receive back the 401 Authorization Required response along with information about what authentication methods are accepted, and then re-send with an accepted authentication method. If the authentication method is known in advance, then an application may set the appropriate property, such as NtlmAuth to True so that the extra (internal) round-trip is not required.

BgLastErrorText As String (ReadOnly)

This property is deprecated. It will be removed in a future version.

When a background-enabled method is run asynchronously in a background thread, the last-error information is saved here and not in the LastErrorText property. If the background method fails, this will contain information about what transpired. (This property also contains information when the background method succeeds.)

This functionality is replaced by the new model for asynchronous programming introduced in Chilkat v9.5.0.52. Applications should use the new model, which is identified by methods having names ending with "Async" and return a task object.

BgPercentDone As Integer (ReadOnly)

This property is deprecated. It will be removed in a future version.

The integer percent completed for a background HTTP method call. The value will be between 0 and 100 while a background method call is in progress. Otherwise, the value is meaningless. The BgPercentDone only applies in cases where it is possible to track completion by a percentage. If an HTTP response is chunked, then there is no way of knowing how much response data is forthcoming, and therefore it is not possible to track the percentage completed.

This functionality is replaced by the new model for asynchronous programming introduced in Chilkat v9.5.0.52. Applications should use the new model, which is identified by methods having names ending with "Async" and return a task object.

BgResultData As Byte() (ReadOnly)

This property is deprecated. It will be removed in a future version.

If a backgrounded method returns a byte array, the returned data is found here.

This functionality is replaced by the new model for asynchronous programming introduced in Chilkat v9.5.0.52. Applications should use the new model, which is identified by methods having names ending with "Async" and return a task object.

BgResultInt As Integer (ReadOnly)

This property is deprecated. It will be removed in a future version.

If a backgrounded method returns an integer, the return value is found here.

This functionality is replaced by the new model for asynchronous programming introduced in Chilkat v9.5.0.52. Applications should use the new model, which is identified by methods having names ending with "Async" and return a task object.

BgResultString As String (ReadOnly)

This property is deprecated. It will be removed in a future version.

If a backgrounded method returns a string, the return value is found here.

This functionality is replaced by the new model for asynchronous programming introduced in Chilkat v9.5.0.52. Applications should use the new model, which is identified by methods having names ending with "Async" and return a task object.

BgTaskFinished As Boolean (ReadOnly)

This property is deprecated. It will be removed in a future version.

Becomes True when the background method completes. Your application would periodically check for this condition.

This functionality is replaced by the new model for asynchronous programming introduced in Chilkat v9.5.0.52. Applications should use the new model, which is identified by methods having names ending with "Async" and return a task object.

BgTaskRunning As Boolean (ReadOnly)

This property is deprecated. It will be removed in a future version.

If True then the object instance already has a backgrounded method running. Another backgrounded method cannot be started until the 1st completes. (Multiple simultaneous background methods may run by using multiple object instances.)

If False, then no method is currently running in a background thread.

This functionality is replaced by the new model for asynchronous programming introduced in Chilkat v9.5.0.52. Applications should use the new model, which is identified by methods having names ending with "Async" and return a task object.

BgTaskSuccess As Boolean (ReadOnly)

This property is deprecated. It will be removed in a future version.

This property's value is only meaningful (True or False) after a backgrounded method completes.

This functionality is replaced by the new model for asynchronous programming introduced in Chilkat v9.5.0.52. Applications should use the new model, which is identified by methods having names ending with "Async" and return a task object.

ClientIpAddress As String

The IP address to use for computers with multiple network interfaces or IP addresses. For computers with a single network interface (i.e. most computers), this property should not be set. For multihoming computers, the default IP address is automatically used if this property is not set.

The IP address is a string such as in dotted notation using numbers, not domain names, such as "165.164.55.124".

Important Bind to Adapter Notes for Windows

ConnectFailReason As Integer (ReadOnly)

Introduced in version 9.5.0.56

This property will be set to the status of the last HTTP connection made (or failed to be made) by any HTTP method.

Possible values are:

0 = success

Normal (non-TLS) sockets:
1 = empty hostname
2 = DNS lookup failed
3 = DNS timeout
4 = Aborted by application.
5 = Internal failure.
6 = Connect Timed Out
7 = Connect Rejected (or failed for some other reason)
50 = HTTP proxy authentication failure.
98 = Async operation in progress.
99 = Product is not unlocked.

SSL/TLS:
100 = TLS internal error.
101 = Failed to send client hello.
102 = Unexpected handshake message.
103 = Failed to read server hello.
104 = No server certificate.
105 = Unexpected TLS protocol version.
106 = Server certificate verify failed (the server certificate is expired or the cert's signature verification failed).
107 = Unacceptable TLS protocol version.
109 = Failed to read handshake messages.
110 = Failed to send client certificate handshake message.
111 = Failed to send client key exchange handshake message.
112 = Client certificate's private key not accessible.
113 = Failed to send client cert verify handshake message.
114 = Failed to send change cipher spec handshake message.
115 = Failed to send finished handshake message.
116 = Server's Finished message is invalid.

Connection As String

The Connection header field to be automatically included with GET requests issued by QuickGet or QuickGetStr. The default value is "Keep-Alive". To prevent the Connection header from being added to the HTTP header, set this property to the empty string.

ConnectTimeout As Integer

The amount of time in seconds to wait before timing out when connecting to an HTTP server. The default ConnectTimeout is 30 seconds.

Note: This is the maximum number of seconds to wait for a server to accept a TCP connection. Once the connection is accepted, and bytes begin flowing back-and-forth, then it is the ReadTimeout property that applies. It is the ReadTimeout that applies when receiving data, which includes the reads that occur during a TLS handshake.

CookieDir As String

Specifies a directory where cookies are automatically persisted if the Http.SaveCookies property is turned on. Cookies are stored in XML formatted files, one per domain, to main it easy for other programs to understand and parse. May be set to the string "memory" to cache cookies in memory.

Saving Cookies to XML Files

Caching cookies in-memory.

DebugLogFilePath As String

If set to a file path, causes each Chilkat method or property call to automatically append it's LastErrorText to the specified log file. The information is appended such that if a hang or crash occurs, it is possible to see the context in which the problem occurred, as well as a history of all Chilkat calls up to the point of the problem. The VerboseLogging property can be set to provide more detailed information.

This property is typically used for debugging the rare cases where a Chilkat method call hangs or generates an exception that halts program execution (i.e. crashes). A hang or crash should generally never happen. The typical causes of a hang are:

  1. a timeout related property was set to 0 to explicitly indicate that an infinite timeout is desired,
  2. the hang is actually a hang within an event callback (i.e. it is a hang within the application code), or
  3. there is an internal problem (bug) in the Chilkat code that causes the hang.

DefaultFreshPeriod As Integer

The default freshness period (in minutes) for cached documents when the FreshnessAlgorithm property is set to 0. The default value is 10080 (1 week).

DigestAuth As Boolean

Setting this property to True causes the HTTP component to use digest authentication. The default value is False.

HTTP Authentication (Basic, NTLM, Digest, Negotiate/Kerberos)

EventLogCount As Integer (ReadOnly)

This property is deprecated. It will be removed in a future version.

If the KeepEventLog property is set to True, then this property will contain the number of events that have accumulated in the in-memory event log. The events are indexed from 0 to EventLogCount-1. The ClearEventLog method may be called to clear the event log. The name and value of each event can be retrieved via the EventLogName and EventLogValue methods.

This functionality is replaced by the new model for asynchronous programming introduced in Chilkat v9.5.0.52. Applications should use the new model, which is identified by methods having names ending with "Async" and return a task object.

FetchFromCache As Boolean

Set to true if pages should be fetched from cache when possible. Only HTTP GET requests are cached. HTTP responses that include Set-Cookie headers are not cached. A page is fetched from the disk cache if it is present and it is "fresh" according to the FreshnessAlgorithm property. If a page exists in cache but is not fresh, the HTTP component will issue a revalidate request and update the cache appropriately according to the response.

FinalRedirectUrl As String (ReadOnly)

If an HTTP GET was redirected (as indicated by the WasRedirected property), this property will contain the final redirect URL, assuming the FollowRedirects property is True.

Note: Starting in v9.5.0.49, this property will contain the redirect URL for 301/302 responses even if FollowRedirects is not set to True.

Tracing HTTP Redirects

FollowRedirects As Boolean

If true, then 301, 302, 303, and 307 redirects are automatically followed when calling QuickGet and QuickGetStr. FollowRedirects is true by default.

FreshnessAlgorithm As Integer

The freshness algorithm to use when determining the freshness of a cached HTTP GET response. A value of 1 causes an LM-factor algorithm to be used. This is the default. The LMFactor property is a value between 1 and 100 indicating the percentage of time based on the last-modified date of the HTML page. For example, if the LMFactor is 50, and an HTML page was modified 10 days ago, then the page will expire (i.e. no longer be fresh) in 5 days (50% of 10 days). This only applies to HTTP responses that do not have page expiration information. If the FreshnessAlgorithm = 0, then a constant expire time period determined by the DefaultFreshPeriod property is used.

HeartbeatMs As Integer

This property is only valid in programming environment and languages that allow for event callbacks.

Specifies the time interval in milliseconds between AbortCheck events. A value of 0 (the default) indicate that no AbortCheck events will fire. Any HTTP operation can be aborted via the AbortCheck event.

IgnoreMustRevalidate As Boolean

Some HTTP responses contain a "Cache-Control: must-revalidate" header. If this is present, the server is requesting that the client always issue a revalidate HTTP request instead of serving the page directly from cache. If IgnoreMustRevalidate is set to True, then Chilkat HTTP will serve the page directly from cache without revalidating until the page is no longer fresh.

The default value of this property is False.

IgnoreNoCache As Boolean

Some HTTP responses contain headers of various types that indicate that the page should not be cached. Chilkat HTTP will adhere to this unless this property is set to True.

The default value of this property is False.

KeepEventLog As Boolean

This property is deprecated. It will be removed in a future version.

If True, an in-memory event log is kept for any method that communicates with an HTTP server (such as Download, PostUrlEncoded, QuickGetStr, SynchronousRequest, etc.). When HTTP methods are called asynchronously, the event log can be checked while the HTTP operation is in in progress. This is done by examining the EventLogCount property and then fetching each event's name and value via the EventLogName and EventLogValue methods. See this example: Asynchronous HTTP.

The ClearBgEventLog method may be called to clear the in-memory event log.

Important: If event logging is enabled, make sure to clear the event log after each HTTP method call. Otherwise the log will continue to grow without bounds.

The default value of this property is False.

The following items may be found in the event log:

NameValue
SocketConnecthostname:port, called when initiating a connection.
SocketConnectedhostname:port, called after successfully connected.
HttpProxyConnecthostname:port
SslHandshake "Starting"/"Finished"
HttpGetBeginURL
HttpCacheHit"Returning page from cache."
HttpInfovarious conditions...
"Begin reading response" -- called when beginning to read the response.
"Finished reading response"
"Existing connection with HTTP server no longer open, restarting GET with new connection."
"Reading chunked response."
"UnGzipping response data"
"Connection:close header is present"
GetRequestthe full HTTP GET request to be sent to the server.
ResponseHeaderthe header of the HTTP response.
HttpStatusCodeHTTP response status code (integer)
ChunkSizeSize (in bytes) of next chunk in response.
ResponseContentLengthNon-chunked response size in bytes.
UnGzippedLengthIf the response was gzip compressed, this is the uncompressed size.
HostnameResolvehostname, Called when starting to resolve a hostname (to an IP address)
ResolvedToIpdotted IP address, called after hostname is resolved.
HttpAuthone of the following strings:
"Starting Negotiate Authentication"
"Starting NTLM Authentication"
"Adding Basic Authentication Header"
"Adding Proxy Authentication Header"
"Starting Proxy NTLM Authentication"
"Starting Digest Authentication"
CookieToSendValue of a Set-Cookie header field to be added to the outgoing request.
SavingCookie XML of cookie being persisted.
HttpRedirectRedirect URL
Socks4Connectdomain:port
Socks5Connectdomain:port
HttpRequestBeginVerb (such as POST, GET, PUT), domain:port/path
RequestHeaderThe full HTTP request header to be sent.
StartSendingRequestSize of entire request, including header, in number of bytes. (Not called for QuickGet) For uploads, this is the size of the entire upload (headers and all files combined)
SubPartHeaderThe header for one of the parts within a multipart request.
UploadFilenameThe file about to be uploaded (streamed from file to socket..)

This functionality is replaced by the new model for asynchronous programming introduced in Chilkat v9.5.0.52. Applications should use the new model, which is identified by methods having names ending with "Async" and return a task object.

KeepResponseBody As Boolean

Introduced in version 9.5.0.55

If True, then the response body, if text, is saved to the LastResponseBody property for all methods that do not return an HttpResponse object. The default value of this property is False.

LastContentType As String (ReadOnly)

The content-type of the last HTTP response received by the HTTP component.

LastErrorHtml As String (ReadOnly)

Provides information in HTML format about the last method/property called. If a method call returns a value indicating failure, or behaves unexpectedly, examine this property to get more information.

LastErrorText As String (ReadOnly)

Provides information in plain-text format about the last method/property called. If a method call returns a value indicating failure, or behaves unexpectedly, examine this property to get more information.

Concept of LastErrorText

LastErrorText Standard Information

LastErrorXml As String (ReadOnly)

Provides information in XML format about the last method/property called. If a method call returns a value indicating failure, or behaves unexpectedly, examine this property to get more information.

LastHeader As String (ReadOnly)

The text of the last HTTP header sent by any of this class's methods. The purpose of this property is to allow the developer to examine the exact HTTP header for debugging purposes.

LastMethodSuccess As Boolean

Introduced in version 9.5.0.52

Indicate whether the last method call succeeded or failed. A value of True indicates success, a value of False indicates failure. This property is automatically set for method calls. It is not modified by property accesses. The property is automatically set to indicate success for the following types of method calls:

  • Any method that returns a string.
  • Any method returning a Chilkat object, binary bytes, or a date/time.
  • Any method returning a standard boolean status value where success = True and failure = False.
  • Any method returning an integer where failure is defined by a return value less than zero.

Note: Methods that do not fit the above requirements will always set this property equal to True. For example, a method that returns no value (such as a "void" in C++) will technically always succeed.

LastModDate As String (ReadOnly)

The value of the Last-Modified header in the last HTTP response received by the HTTP component.

LastResponseBody As String (ReadOnly)

Introduced in version 9.5.0.55

The response body of the last HTTP response received by the HTTP component (for methods that do not return an HttpResponse object). The last response body is only saved to this property IF the KeepResponseBody property is set to True.

LastResponseHeader As String (ReadOnly)

The entire response header for the last HTTP response received by the HTTP component (for methods that do not return an HttpResponse object).

LastStatus As Integer (ReadOnly)

The last HTTP status value received by the HTTP component. This only applies to methods that do not return an HTTP response object. For methods that return an HTTP response object, such as SynchronousRequest, the status code is found in the StatusCode property of the response object.

LastStatusText As String (ReadOnly)

Introduced in version 9.5.0.69

The last HTTP status text received by the HTTP component. This only applies to methods that do not return an HTTP response object. For methods that return an HTTP response object, such as SynchronousRequest, the status text is found in the StatusText property of the response object.

LMFactor As Integer

An integer between 1 and 100 that indicates the percentage of time from the HTTP page's last-modified date that will be used for the freshness period. The default value is 25. For example, if a page is fetched with a last-modified date of 4 weeks ago, and the LMFactor = 25, then the page will be considered fresh in the cache for 1 week (25% of 4 weeks).

Login As String

The HTTP login for pages requiring a login/password. Chilkat HTTP can do Basic, Digest, and NTLM HTTP authentication. (NTLM is also known as SPA (or Windows Integrated Authentication). To use Basic authentication, the BasicAuth property must be set equal to True. It is not necessary to set the NtlmAuth or DigestAuth properties beforehand if NTLM or Digest authentication is needed. However, it is most efficient to pre-set these properties when the type of authentication is known in advance.

HTTP Authentication (Basic, NTLM, Digest, Negotiate/Kerberos)

LoginDomain As String

The optional domain name to be used with NTLM / Kerberos / Negotiate authentication.

MaxConnections As Integer

The maximum number of simultaneous open HTTP connections managed by the HTTP component. The Chilkat HTTP component automatically manages HTTP connections. If the number of open HTTP connections is about to be exceeded, the connection with the least recent activity is automatically closed.

MaxFreshPeriod As Integer

Limits the amount of time a document can be kept "fresh" in the cache. The MaxFreshPeriod is specified in minutes, and the default value is 525600 which is equal to 1 year.

MaxResponseSize As UInteger

The maximum HTTP response size to be accepted by the calling program. A value of 0 (the default) indicates that there is no maximum value.

MaxUrlLen As Integer

The Http class will automatically fail any URL longer than this length. The default MaxUrlLen is 800 characters.

MimicFireFox As Boolean

If set to True, then the appropriate headers to mimic Mozilla/FireFox are automatically added to requests sent via the QuickGet and QuickGetStr methods.

MimicIE As Boolean

If set to True, then the appropriate headers to mimic Internet Explorer are automatically added to requests sent via the QuickGet and QuickGetStr methods.

MinFreshPeriod As Integer

The freshness period for a document in cache will not be less than this value (in minutes). The default value is 30.

NegotiateAuth As Boolean

Set this property equal to True for Negotiate authentication. Negotiate authentication will dynamically select Kerberos or NTLM authentication depending on what the server requires.

Note: The NegotiateAuth property is only available for the Microsoft Windows operating system.

HTTP Authentication (Basic, NTLM, Digest, Negotiate/Kerberos)

NtlmAuth As Boolean

Setting this property to True causes the HTTP component to use NTLM authentication (also known as IWA -- or Integrated Windows Authentication) when authentication with an HTTP server. The default value is False.

HTTP Authentication (Basic, NTLM, Digest, Negotiate/Kerberos)

NumCacheLevels As Integer

The number of directory levels to be used under each cache root. The default is 0, meaning that each cached HTML page is stored in a cache root directory. A value of 1 causes each cached page to be stored in one of 255 subdirectories named "0","1", "2", ..."255" under a cache root. A value of 2 causes two levels of subdirectories ("0..255/0..255") under each cache root. The HTTP control automatically creates subdirectories as needed. The reason for mutliple levels is to alleviate problems that may arise with unrelated software when huge numbers of files are stored in a single directory. For example, Windows Explorer does not behave well when trying to display the contents of directories with thousands of files.

NumCacheRoots As Integer (ReadOnly)

The number of cache roots to be used for the HTTP cache. This allows the disk cache spread out over multiple disk drives. Each cache root is a string indicating the drive letter and directory path. For example, "E:\Cache". An example of a very large low-cost cache might be four USB external drives. To create a cache with four roots, call AddCacheRoot once for each directory root.

OAuth1 As Boolean

If True then causes an OAuth Authorization header to be added to any request sent by the HTTP object. For example:

Authorization: OAuth realm="http://sp.example.com/",
                oauth_consumer_key="0685bd9184jfhq22",
                oauth_token="ad180jjd733klru7",
                oauth_signature_method="HMAC-SHA1",
                oauth_signature="wOJIO9A2W5mFwDgiDvZbTSMK%2FPY%3D",
                oauth_timestamp="137131200",
                oauth_nonce="4572616e48616d6d65724c61686176",
                oauth_version="1.0"
The information used to compute the OAuth Authorization header is obtained from the other OAuth* properties, such as OAuthConsumerKey, OAuthConsumerSecret, OAuthRealm, etc.

Twitter OAuth -- Tweet to Your Own Account

Quickbooks OAuth1 Authorization (3-legged)

Twitter OAuth1 Authorization (3-legged)

Xero OAuth1 Authorization (3-legged)

OAuthCallback As String

Introduced in version 9.5.0.53

The OAuth 1.0 callback URL. Defaults to "oob".

OAuthConsumerKey As String

The OAuth consumer key to be used in the Authorization header.

OAuthConsumerSecret As String

The OAuth consumer secret to be used in computing the contents of the Authorization header.

OAuthRealm As String

The OAuth realm to be used in the Authorization header.

OAuthSigMethod As String

The OAuth signature method, such as "HMAC-SHA1" to be used in the Authorization header. The default is "HMAC-SHA1". It is also possible to choose "HMAC-SHA256", "RSA-SHA1" or "RSA-SHA2". For RSA algorithms, an RSA private key would need to be provided via the SetOAuthRsaKey method.

Note: RSA-SHA2 is supported starting in Chilkat v9.5.0.56

OAuthToken As String

The OAuth token to be used in the Authorization header.

Twitter OAuth -- Tweet to Your Own Account

OAuthTokenSecret As String

The OAuth token secret to be used in computing the Authorization header.

OAuthVerifier As String

The OAuth verifier to be used in the Authorization header.

Password As String

The HTTP password for pages requiring a login/password. Chilkat HTTP can do Basic, Digest, and NTLM HTTP authentication. (NTLM is also known as SPA (or Windows Integrated Authentication). To use Basic authentication, the BasicAuth property must be set equal to True. It is not necessary to set the NtlmAuth or DigestAuth properties beforehand if NTLM or Digest authentication is needed. However, it is most efficient to pre-set these properties when the type of authentication is known in advance.

PercentDoneScale As Integer

Introduced in version 9.5.0.49

This property is only valid in programming environment and languages that allow for event callbacks.

Sets the value to be defined as 100% complete for the purpose of PercentDone event callbacks. The defaut value of 100 means that at most 100 event PercentDone callbacks will occur in a method that (1) is event enabled and (2) is such that it is possible to measure progress as a percentage completed. This property may be set to larger numbers to get more fine-grained PercentDone callbacks. For example, setting this property equal to 1000 will provide callbacks with .1 percent granularity. For example, a value of 453 would indicate 45.3% competed. This property is clamped to a minimum value of 10, and a maximum value of 100000.

PreferIpv6 As Boolean

If True, then use IPv6 over IPv4 when both are supported for a particular domain. The default value of this property is False, which will choose IPv4 over IPv6.

ProxyAuthMethod As String

Set this to "basic" if you know in advance that Basic authentication is to be used for the HTTP proxy. Otherwise leave this property unset. Note: It is not necessary to set this property. The HTTP component will automatically handle proxy authentication for any of the supported authentication methods: NTLM, Digest, or Basic. Setting this property equal to "basic" prevents the 407 response which is automatically handled internal to Chilkat and never seen by your application.

Note: If NTLM authentication does not succeed, set the Global.DefaultNtlmVersion property equal to 1 and then retry.

ProxyDomain As String

The domain name of a proxy host if an HTTP proxy is used.

ProxyLogin As String

If an HTTP proxy is used and it requires authentication, this property specifies the HTTP proxy login.

ProxyLoginDomain As String

The NTLM authentication domain (optional) if NTLM authentication is used.

ProxyPassword As String

If an HTTP proxy is used and it requires authentication, this property specifies the HTTP proxy password.

ProxyPort As Integer

The port number of a proxy server if an HTTP proxy is used.

ReadTimeout As Integer

The amount of time in seconds to wait before timing out when reading from an HTTP server. The ReadTimeout is the amount of time that needs to elapse while no additional data is forthcoming. During a long download, if the data stream halts for more than this amount, it will timeout. Otherwise, there is no limit on the length of time for the entire download.

The default value is 20 seconds.

RedirectVerb As String

Indicates the HTTP verb, such as GET, POST, PUT, etc. to be used for a redirect when the FollowRedirects property is set to True. The default value of this property is "GET". This will produce the same behavior as a web browser (such as FireFox). If this property is set to the empty string, then it will cause the same verb as the original HTTP request to be used.

Note: Prior to version 9.5.0.44, the default value of this property was the empty string.

Referer As String

The Referer header field to be automatically included with GET requests issued by QuickGet or QuickGetStr. The default value is the empty string which causes the Referer field to be omitted from the request header.

RequiredContentType As String

If set, then any HTTP response to any POST or GET, including downloads, will be rejected if the content-type in the response header does not match this setting. If the content-type does not match, only the header of the HTTP response is read, the connection to the HTTP server is closed, and the remainder of the response is never read.

This property is empty (zero-length string) by default.

Some typical content-types are "text/html", "text/xml", "image/gif", "image/jpeg", "application/zip", "application/msword", "application/pdf", etc.

RequireSslCertVerify As Boolean

If True, then the HTTP client will verify the server's SSL certificate. The certificate is expired, or if the cert's signature is invalid, the connection is not allowed. The default value of this property is False.

Require that the Web Server's SSL Certificate is Non-Expired and the Signature is Valid

S3Ssl As Boolean

If True, then all S3_* methods will use a secure SSL/TLS connection for communications. (If True, Chilkat uses TLS 1.2) The default value is False.

SaveCookies As Boolean

If this property is True, cookies are automatically persisted to XML files in the directory specified by the CookiesDir property (or in memory if CookieDir = "memory"). Both CookiesDir and SaveCookies must be set for cookies to be persisted.

Caching cookies in-memory.

SendBufferSize As Integer

The buffer size to be used with the underlying TCP/IP socket for sending. The default value is 65535.

SendCookies As Boolean

If True, then cookies previously persisted to the CookiesDir are automatically added to all HTTP requests. Only cookies matching the domain and path are added.

Caching cookies in-memory.

SessionLogFilename As String

Enables file-based session logging. If set to a filename (or relative/absolute filepath), then the exact HTTP requests and responses are logged to a file. The file is created if it does not already exist, otherwise it is appended.

Debugging HTTP

HTTP Session Logging

SocksHostname As String

The SOCKS4/SOCKS5 hostname or IPv4 address (in dotted decimal notation). This property is only used if the SocksVersion property is set to 4 or 5).

HTTP/HTTPS using SOCKS5 Proxy

HTTP/HTTPS using SOCKS4 Proxy

SocksPassword As String

The SOCKS5 password (if required). The SOCKS4 protocol does not include the use of a password, so this does not apply to SOCKS4.

SocksPort As Integer

The SOCKS4/SOCKS5 proxy port. The default value is 1080. This property only applies if a SOCKS proxy is used (if the SocksVersion property is set to 4 or 5).

SocksUsername As String

The SOCKS4/SOCKS5 proxy username. This property is only used if the SocksVersion property is set to 4 or 5).

HTTP/HTTPS using SOCKS5 Proxy

HTTP/HTTPS using SOCKS4 Proxy

SocksVersion As Integer

SocksVersion May be set to one of the following integer values:

0 - No SOCKS proxy is used. This is the default.
4 - Connect via a SOCKS4 proxy.
5 - Connect via a SOCKS5 proxy.

HTTP/HTTPS using SOCKS5 Proxy

HTTP/HTTPS using SOCKS4 Proxy

SoRcvBuf As Integer

Sets the receive buffer size socket option. Normally, this property should be left unchanged. The default value is 4194304.

This property can be increased if download performance seems slow. It is recommended to be a multiple of 4096.

More Information about TCP performance and Buffer Sizes

SoSndBuf As Integer

Sets the send buffer size socket option. Normally, this property should be left unchanged. The default value is 262144.

This property can be increased if upload performance seems slow. It is recommended to be a multiple of 4096. Testing with sizes such as 512K and 1MB is reasonable.

More Information about TCP performance and Buffer Sizes

SslAllowedCiphers As String

Introduced in version 9.5.0.48

Provides a means for setting a list of ciphers that are allowed for SSL/TLS connections. The default (empty string) indicates that all implemented ciphers are possible. The TLS ciphers supported in Chilkat v9.5.0.55 and later are:

TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA384
TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384
TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA
TLS_DHE_RSA_WITH_AES_256_CBC_SHA256
TLS_DHE_RSA_WITH_AES_256_GCM_SHA384
TLS_DHE_RSA_WITH_AES_256_CBC_SHA
TLS_RSA_WITH_AES_256_CBC_SHA256
TLS_RSA_WITH_AES_256_GCM_SHA384
TLS_RSA_WITH_AES_256_CBC_SHA
TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256
TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256
TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA
TLS_DHE_RSA_WITH_AES_128_CBC_SHA256
TLS_DHE_RSA_WITH_AES_128_GCM_SHA256
TLS_DHE_RSA_WITH_AES_128_CBC_SHA
TLS_RSA_WITH_AES_128_CBC_SHA256
TLS_RSA_WITH_AES_128_GCM_SHA256
TLS_RSA_WITH_AES_128_CBC_SHA
TLS_ECDHE_RSA_WITH_3DES_EDE_CBC_SHA
TLS_DHE_RSA_WITH_3DES_EDE_CBC_SHA
TLS_RSA_WITH_3DES_EDE_CBC_SHA
TLS_ECDHE_RSA_WITH_RC4_128_SHA
TLS_RSA_WITH_RC4_128_SHA
TLS_RSA_WITH_RC4_128_MD5
TLS_DHE_RSA_WITH_DES_CBC_SHA
TLS_RSA_WITH_DES_CBC_SHA
To restrict SSL/TLS connections to one or more specific ciphers, set this property to a comma-separated list of ciphers such as "TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA384, TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384". The order should be in terms of preference, with the preferred algorithms listed first. (Note that the client cannot specifically choose the algorithm is picked because it is the server that chooses. The client simply provides the server with a list from which to choose.)

The property can also disallow connections with servers having certificates with RSA keys less than a certain size. By default, server certificates having RSA keys of 512 bits or greater are allowed. Add the keyword "rsa1024" to disallow connections with servers having keys smaller than 1024 bits. Add the keyword "rsa2048" to disallow connections with servers having keys smaller than 2048 bits.

Note: Prior to Chilkat v9.5.0.55, it was not possible to explicitly list allowed cipher suites. The deprecated means for indicating allowed ciphers was both incomplete and unprecise. For example, the following keywords could be listed to allow matching ciphers: "aes256-cbc", "aes128-cbc", "3des-cbc", and "rc4". These keywords will still be recognized, but programs should be updated to explicitly list the allowed ciphers.

secure-renegotiation: Starting in Chilkat v9.5.0.55, the keyword "secure-renegotiation" may be added to require that all renegotions be done securely (as per RFC 5746).

best-practices: Starting in Chilkat v9.5.0.55, this property may be set to the single keyword "best-practices". This will allow ciphers based on the current best practices. As new versions of Chilkat are released, the best practices may change. Changes will be noted here. The current best practices are:

  • If the server uses an RSA key, it must be 1024 bits or greater.
  • All renegotations must be secure renegotiations.
  • All ciphers using RC4, DES, or 3DES are disallowed.

Example: The following string would restrict to 2 specific cipher suites, require RSA keys to be 1024 bits or greater, and require secure renegotiations: "TLS_DHE_RSA_WITH_AES_256_CBC_SHA256, TLS_RSA_WITH_AES_256_CBC_SHA, rsa1024, secure-renegotiation"

SslProtocol As String

Introduced in version 9.5.0.46

Selects the secure protocol to be used for secure (SSL/TLS) connections. Possible values are:

default
TLS 1.2
TLS 1.1
TLS 1.0
SSL 3.0
TLS 1.2 or higher
TLS 1.1 or higher
TLS 1.0 or higher
The default value is "default" which will choose the, which allows for the protocol to be selected dynamically at runtime based on the requirements of the server. Choosing an exact protocol will cause the connection to fail unless that exact protocol is negotiated. It is better to choose "X or higher" than an exact protocol. The "default" is effectively "SSL 3.0 or higher".

StreamResponseBodyPath As String

Introduced in version 9.5.0.49

Allows for the HTTP response body to be streamed directly into a file. If this property is set, then any method returning an HTTP response object will stream the response body directly to the file path specified. The HTTP response object will still contain the response header. (This property is useful when the HTTP response is too large to fit into memory.)

TlsCipherSuite As String (ReadOnly)

Introduced in version 9.5.0.49

Contains the current or last negotiated TLS cipher suite. If no TLS connection has yet to be established, or if a connection as attempted and failed, then this will be empty. A sample cipher suite string looks like this: TLS_DHE_RSA_WITH_AES_256_CBC_SHA256.

TlsPinSet As String

Introduced in version 9.5.0.55

Specifies a set of pins for Public Key Pinning for TLS connections. This property lists the expected SPKI fingerprints for the server certificates. If the server's certificate (sent during the TLS handshake) does not match any of the SPKI fingerprints, then the TLS handshake is aborted and the connection fails. The format of this string property is as follows:

hash_algorithm, encoding, SPKI_fingerprint_1, SPKI_fingerprint_2, ...
For example, the following string specifies a single sha256 base64-encoded SPKI fingerprint:
"sha256, base64, lKg1SIqyhPSK19tlPbjl8s02yChsVTDklQpkMCHvsTE="
This example specifies two SPKI fingerprints:
"sha256, base64, 4t37LpnGmrMEAG8HEz9yIrnvJV2euVRwCLb9EH5WZyI=, 68b0G5iqMvWVWvUCjMuhLEyekM5729PadtnU5tdXZKs="
Any of the following hash algorithms are allowed:.sha1, sha256, sha384, sha512, md2, md5, haval, ripemd128, ripemd160,ripemd256, or ripemd320.

The following encodings are allowed: base64, hex, and any of the encodings indicated in the link below.

Encodings Supported by Chilkat

HTTP Public Key Pinning

TlsVersion As String (ReadOnly)

Introduced in version 9.5.0.49

Contains the current or last negotiated TLS protocol version. If no TLS connection has yet to be established, or if a connection as attempted and failed, then this will be empty. Possible values are "SSL 3.0", "TLS 1.0", "TLS 1.1", and "TLS 1.2".

UpdateCache As Boolean

Controls whether the cache is automatically updated with the responses from HTTP GET requests.

UseBgThread As Boolean

This property is deprecated. It will be removed in a future version.

If True, then background-enabled methods will run in a background thread. Normally, a method will return after its work is completed. However, when UseBgThread is true, the method will return immediately and a background thread is started to carry out the method's task.

Background-enabled HTTP methods are:

  • Download
  • DownloadAppend
  • GetHead
  • PostBinary
  • PostMime
  • PostUrlEncoded
  • PostXml
  • PutText
  • QuickDeleteStr
  • QuickGet
  • QuickGetObj
  • QuickGetStr
  • QuickPutStr
  • ResumeDownload
  • SynchronousRequest
  • XmlRpc
  • XmlRpcPut
  • This functionality is replaced by the new model for asynchronous programming introduced in Chilkat v9.5.0.52. Applications should use the new model, which is identified by methods having names ending with "Async" and return a task object.

UseIEProxy As Boolean

If True, the proxy host/port used by Internet Explorer will also be used by Chilkat HTTP.

UserAgent As String

The UserAgent header field to be automatically included with GET requests issued by QuickGet or QuickGetStr. The default value is "Mozilla/5.0 (Windows NT 6.3; WOW64; rv:49.0) Gecko/20100101 Firefox/49.0". The reason for this default is to get the same server behavior for a recent version of a typical and popular browser. Some sites may respond differently depending on the User-Agent, and the goal is to avoid strange responses that are different than what a typical browser would receive.

VerboseLogging As Boolean

If set to True, then the contents of LastErrorText (or LastErrorXml, or LastErrorHtml) may contain more verbose information. The default value is False. Verbose logging should only be used for debugging. The potentially large quantity of logged information may adversely affect peformance.

Version As String (ReadOnly)

Version of the component/library, such as "9.5.0.63"

WasRedirected As Boolean (ReadOnly)

Indicates whether the last HTTP GET was redirected.

Methods

Sub AddCacheRoot(ByVal dir As String)

This method must be called at least once if disk caching is to be used. The file path (including drive letter) such as "E:\MyHttpCache\" is passed to AddCacheRoot to specify the root directory. The cache can be spread across multiple disk drives by calling AddCacheRoot multiple times, each with a directory path on a separate disk drive.

Function AddQuickHeader(ByVal headerFieldName As String, ByVal headerFieldValue As String) As Boolean

This method is deprecated. It will be removed in a future version.

Adds a custom header field to any HTTP request sent by a method that does not use the HTTP request object. These methods include Download, DownloadAppend, GetHead, PostBinary, PostMime, PostXml, PutBinary, PutText, QuickDeleteStr, QuickGet, QuickGetObj, QuickGetStr, QuickPutStr, XmlRpc, and XmlRpcPut.

Cookies may be explictly added by calling this method passing "Cookie" for the headerFieldName.

The RemoveQuickHeader method can be called to remove a custom header.

* Note: This method is deprecated. It is identical to the SetRequestHeader method. The SetRequestHeader method should be called instead because AddQuickHeader will be removed in a future version.

Returns True for success, False for failure.

Adding Cookies to an HTTP Request

Function BgResponseObject() As HttpResponse

This method is deprecated. It will be removed in a future version.

If a backgrounded method returns an Http response object, it may be retrieved by calling this method.

This functionality is replaced by the new model for asynchronous programming introduced in Chilkat v9.5.0.52. Applications should use the new model, which is identified by methods having names ending with "Async" and return a task object.

Returns Nothing on failure

Sub BgTaskAbort()

This method is deprecated. It will be removed in a future version.

Call this to force the currently running backgrounded method to abort.

This functionality is replaced by the new model for asynchronous programming introduced in Chilkat v9.5.0.52. Applications should use the new model, which is identified by methods having names ending with "Async" and return a task object.

Sub ClearBgEventLog()

This method is deprecated. It will be removed in a future version.

Clears the in-memory event log (which is enabled by setting the KeepEventLog property = True).

This functionality is replaced by the new model for asynchronous programming introduced in Chilkat v9.5.0.52. Applications should use the new model, which is identified by methods having names ending with "Async" and return a task object.

Sub ClearInMemoryCookies()

Clears all cookies cached in memory. Calling this only makes sense if the CookieDir property is set to the string "memory".

Sub ClearUrlVars()

Introduced in version 9.5.0.67

Clears all URL variable values previously set by one or more calls to SetUrlVar.

Function CloseAllConnections() As Boolean

Closes all connections still open from previous HTTP requests.

An HTTP object instance will maintain up to 10 connections. If the HTTP server's response does not include a "Connection: Close" header, the connection will remain open and will be re-used if possible for the next HTTP request to the same hostname:port. (It uses the IP address (in string form) or the domain name, whichever is used in the URL provided by the application.) If 10 connections are already open and another is needed, the object will close the least recently used connection.

Returns True for success, False for failure.

Function CloseAllConnectionsAsync() As Task

Creates an asynchronous task to call the CloseAllConnections method with the arguments provided. (Async methods are available starting in Chilkat v9.5.0.52.)

Note: Async method event callbacks happen in the background thread. Accessing and updating UI elements existing in the main thread may require special considerations.

Returns Nothing on failure

How to Run an Asynchronous Task

Sub DnsCacheClear()

Introduced in version 9.5.0.38

Clears the Chilkat-wide in-memory hostname-to-IP address DNS cache. Chilkat automatically maintains this in-memory cache to prevent redundant DNS lookups. If the TTL on the DNS A records being accessed are short and/or these DNS records change frequently, then this method can be called clear the internal cache. Note: The DNS cache is used/shared among all Chilkat objects in a program, and clearing the cache affects all Chilkat objects.

Function Download(ByVal url As String, ByVal localFilePath As String) As Boolean

Retrieves the content at a URL and saves to a file. All content is saved in streaming mode such that the memory footprint is small and steady. HTTPS is fully supported, as it is with all the methods of this class.

Returns True for success, False for failure.

HTTP Download any Type of File (binary or text)

Debugging HTTP

Function DownloadAsync(ByVal url As String, ByVal localFilePath As String) As Task

Creates an asynchronous task to call the Download method with the arguments provided. (Async methods are available starting in Chilkat v9.5.0.52.)

Note: Async method event callbacks happen in the background thread. Accessing and updating UI elements existing in the main thread may require special considerations.

Returns Nothing on failure

How to Run an Asynchronous Task

Function DownloadAppend(ByVal url As String, ByVal filename As String) As Boolean

Same as the Download method, but the output file is open for append.

Returns True for success, False for failure.

Function DownloadAppendAsync(ByVal url As String, ByVal filename As String) As Task

Creates an asynchronous task to call the DownloadAppend method with the arguments provided. (Async methods are available starting in Chilkat v9.5.0.52.)

Note: Async method event callbacks happen in the background thread. Accessing and updating UI elements existing in the main thread may require special considerations.

Returns Nothing on failure

How to Run an Asynchronous Task

Function DownloadBd(ByVal url As String, ByVal binData As BinData) As Boolean

Introduced in version 9.5.0.63

Downloads the content at the url into a BinData object.

Returns True for success, False for failure.

Upload In-Memory Binary Data to Google Cloud Storage

Function DownloadBdAsync(ByVal url As String, ByVal binData As BinData) As Task

Introduced in version 9.5.0.63

Creates an asynchronous task to call the DownloadBd method with the arguments provided. (Async methods are available starting in Chilkat v9.5.0.52.)

Note: Async method event callbacks happen in the background thread. Accessing and updating UI elements existing in the main thread may require special considerations.

Returns Nothing on failure

How to Run an Asynchronous Task

Function DownloadHash(ByVal url As String, ByVal hashAlgorithm As String, ByVal encoding As String) As String

Retrieves the content at a URL and computes and returns a hash of the content. The hash is returned as an encoded string according to the encoding, which may be "Base64", "modBase64", "Base32", "UU", "QP" (for quoted-printable), "URL" (for url-encoding), "Hex", "Q", "B", "url_oath", "url_rfc1738", "url_rfc2396", and "url_rfc3986". The hashAlgorithm may be "sha1", "sha256", "sha384", "sha512", "md2", "md5", "haval", "ripemd128", "ripemd160","ripemd256", or "ripemd320".

Returns Nothing on failure

Function DownloadHashAsync(ByVal url As String, ByVal hashAlgorithm As String, ByVal encoding As String) As Task

Creates an asynchronous task to call the DownloadHash method with the arguments provided. (Async methods are available starting in Chilkat v9.5.0.52.)

Note: Async method event callbacks happen in the background thread. Accessing and updating UI elements existing in the main thread may require special considerations.

Returns Nothing on failure

How to Run an Asynchronous Task

Function DownloadSb(ByVal url As String, ByVal charset As String, ByVal sb As StringBuilder) As Boolean

Introduced in version 9.5.0.63

Downloads the content at the url into a Chilkat StringBuilder object. The charset tells Chilkat how to interpret the bytes received. The sb is appended with the downloaded text data.

Returns True for success, False for failure.

Function DownloadSbAsync(ByVal url As String, ByVal charset As String, ByVal sb As StringBuilder) As Task

Introduced in version 9.5.0.63

Creates an asynchronous task to call the DownloadSb method with the arguments provided. (Async methods are available starting in Chilkat v9.5.0.52.)

Note: Async method event callbacks happen in the background thread. Accessing and updating UI elements existing in the main thread may require special considerations.

Returns Nothing on failure

How to Run an Asynchronous Task

Function EventLogName(ByVal index As Integer) As String

This method is deprecated. It will be removed in a future version.

Returns the name of the Nth event in the in-memory event log. Refer to the documentation for the KeepEventLog property for the full list of event names. Indexing is from 0 to EventLogCount-1.

This functionality is replaced by the new model for asynchronous programming introduced in Chilkat v9.5.0.52. Applications should use the new model, which is identified by methods having names ending with "Async" and return a task object.

Returns Nothing on failure

Function EventLogValue(ByVal index As Integer) As String

This method is deprecated. It will be removed in a future version.

Returns the value of the Nth event in the in-memory event log. Indexing is from 0 to EventLogCount-1.

This functionality is replaced by the new model for asynchronous programming introduced in Chilkat v9.5.0.52. Applications should use the new model, which is identified by methods having names ending with "Async" and return a task object.

Returns Nothing on failure

Function ExtractMetaRefreshUrl(ByVal htmlContent As String) As String

Convenience method for extracting the META refresh URL from HTML. For example, if the htmlContent contains a META refresh tag, such as:

<meta http-equiv="refresh" content="5;URL='http://example.com/'">
Then the return value of this method would be "http://example.com/".

Returns Nothing on failure

Function G_SvcOauthAccessToken(ByVal iss As String, ByVal scope As String, ByVal subEmail As String, ByVal numSec As Integer, ByVal cert As Cert) As String

Introduced in version 9.5.0.44

Makes an access token request to obtain a Google API OAuth2 access token for a service account. Access tokens issued by the Google OAuth 2.0 Authorization Server expire one hour after they are issued. When an access token expires, then the application should generate another JWT, sign it, and request another access token. The iss is the service account email address of the application making the access token request. The scope is a space-delimited list of the permissions that the application requests. (See https://developers.google.com/accounts/docs/OAuth2ServiceAccount )

The subEmail is the email address of the user for which the application is requesting delegated access. The subEmail may be left empty if there is no such email address.

Returns Nothing on failure

Get XOAUTH2 Access Token from Google OAuth 2.0 Authorization Server

Function G_SvcOauthAccessTokenAsync(ByVal iss As String, ByVal scope As String, ByVal subEmail As String, ByVal numSec As Integer, ByVal cert As Cert) As Task

Introduced in version 9.5.0.44

Creates an asynchronous task to call the G_SvcOauthAccessToken method with the arguments provided. (Async methods are available starting in Chilkat v9.5.0.52.)

Note: Async method event callbacks happen in the background thread. Accessing and updating UI elements existing in the main thread may require special considerations.

Returns Nothing on failure

How to Run an Asynchronous Task

Function G_SvcOauthAccessToken2(ByVal claimParams As Hashtable, ByVal numSec As Integer, ByVal cert As Cert) As String

Introduced in version 9.5.0.51

The same as the G_SvcOauthAccessToken method, but with added flexibility for more customization. The 1st three args of the G_SvcOauthAccessToken are replaced with claimParams allowing for future expansion of name-value params. See the example below.

Returns Nothing on failure

Get OAuth 2.0 Access Token using G_SvcOauthAccessToken2

Function G_SvcOauthAccessToken2Async(ByVal claimParams As Hashtable, ByVal numSec As Integer, ByVal cert As Cert) As Task

Introduced in version 9.5.0.51

Creates an asynchronous task to call the G_SvcOauthAccessToken2 method with the arguments provided. (Async methods are available starting in Chilkat v9.5.0.52.)

Note: Async method event callbacks happen in the background thread. Accessing and updating UI elements existing in the main thread may require special considerations.

Returns Nothing on failure

How to Run an Asynchronous Task

Function GenTimeStamp() As String

Returns the current GMT (also known as UTC) date/time in a string that is compliant with RFC 2616 format.

Returns Nothing on failure

Function GetCacheRoot(ByVal index As Integer) As String

Returns the Nth cache root (indexing begins at 0). Cache roots are set by calling AddCacheRoot one or more times.

Returns Nothing on failure

Function GetCookieXml(ByVal domain As String) As String

Returns the cookies in XML format for a specific domain. Cookies are only persisted if the SaveCookies property is set to True. If the CookieDir property is set to the keyword "memory", then cookies are saved in-memory.

Returns Nothing on failure

Demonstrates how to Get Cookies Sent by the HTTP Server

Function GetDomain(ByVal url As String) As String

Utility method for extracting the domain name from a full URL. For example, if "http://www.chilkatsoft.com/default.asp" is the URL passed in, then "www.chilkatsoft.com" is returned.

Returns Nothing on failure

Function GetHead(ByVal url As String) As HttpResponse

Sends an HTTP HEAD request for a URL and returns a response object. (Note: HEAD requests will never automatically follow redirects.)

Returns Nothing on failure

HTTP HEAD Request

Function GetHeadAsync(ByVal url As String) As Task

Creates an asynchronous task to call the GetHead method with the arguments provided. (Async methods are available starting in Chilkat v9.5.0.52.)

Note: Async method event callbacks happen in the background thread. Accessing and updating UI elements existing in the main thread may require special considerations.

Returns Nothing on failure

How to Run an Asynchronous Task

How to Return an Object from an Async Task

Function GetRequestHeader(ByVal name As String) As String

Returns the value of a header field that has been pre-defined to be sent with all HTTP GET requests issued by the QuickGet and QuickGetStr methods. By default, this includes header fields such as Accept, AcceptCharset, AcceptLanguage, Connection, UserAgent, etc.

Returns Nothing on failure

Function GetServerSslCert(ByVal domain As String, ByVal port As Integer) As Cert

Establishes an SSL/TLS connection with a web server for the purpose of retrieving the server's SSL certificate (public-key only of course...). Nothing is retrieved from the web server. This method simply makes a connection, gets the certificate information, and closes the connection.

Returns Nothing on failure

Get the Server Certificate, Certificate Chain, and Root CA Certificate

Get Web Server's SPKI Fingerprint

Function GetServerSslCertAsync(ByVal domain As String, ByVal port As Integer) As Task

Creates an asynchronous task to call the GetServerSslCert method with the arguments provided. (Async methods are available starting in Chilkat v9.5.0.52.)

Note: Async method event callbacks happen in the background thread. Accessing and updating UI elements existing in the main thread may require special considerations.

Returns Nothing on failure

How to Run an Asynchronous Task

How to Return an Object from an Async Task

Function GetUrlPath(ByVal url As String) As String

Returns the path part of a URL. The syntax of a URL is <scheme>://<user>:<password>@<host>:<port>/<path>;<params>?<query>#<frag>. This method returns the "path" part.

Returns Nothing on failure

Function HasRequestHeader(ByVal name As String) As Boolean

Returns true if the specified header field is defined such that it will be sent with all GET requests issued by the QuickGet and QuickGetStr methods.

Function IsUnlocked() As Boolean

Returns true if the Http class has been unlocked. It is necessary to call Http.UnlockComponent before calling any other methods. Passing any string to UnlockComponent will automatically activate a 30-day trial period.

Function PBinary(ByVal verb As String, ByVal url As String, ByVal byteData As Byte(), ByVal contentType As String, ByVal md5 As Boolean, ByVal gzip As Boolean) As HttpResponse

Introduced in version 9.5.0.45

Sends an HTTP request to the url. The verb can be "POST", "PUT", "PATCH", etc. The body of the HTTP request contains the bytes passed in byteData. The contentType is a content type such as "image/gif", "application/pdf", etc. If md5 is True, then a Content-MD5 header is added with the base64 MD5 hash of the byteData. Servers aware of the Content-MD5 header will perform a message integrity check to ensure that the data has not been corrupted. If gzip is True, the byteData is compressed using the gzip algorithm. The HTTP request body will contain the GZIP compressed data, and a "Content-Encoding: gzip" header is automatically added to indicate that the request data needs to be ungzipped when received (at the server).

Returns Nothing on failure

Function PBinaryAsync(ByVal verb As String, ByVal url As String, ByVal byteData As Byte(), ByVal contentType As String, ByVal md5 As Boolean, ByVal gzip As Boolean) As Task

Introduced in version 9.5.0.45

Creates an asynchronous task to call the PBinary method with the arguments provided. (Async methods are available starting in Chilkat v9.5.0.52.)

Note: Async method event callbacks happen in the background thread. Accessing and updating UI elements existing in the main thread may require special considerations.

Returns Nothing on failure

How to Run an Asynchronous Task

How to Return an Object from an Async Task

Function PBinaryBd(ByVal verb As String, ByVal url As String, ByVal data As BinData, ByVal contentType As String, ByVal md5 As Boolean, ByVal gzip As Boolean) As HttpResponse

Introduced in version 9.5.0.69

The same as PBinary, but the data to be uploaded is passed in data.

Returns Nothing on failure

Upload In-Memory Binary Data to Google Cloud Storage

Function PBinaryBdAsync(ByVal verb As String, ByVal url As String, ByVal data As BinData, ByVal contentType As String, ByVal md5 As Boolean, ByVal gzip As Boolean) As Task

Introduced in version 9.5.0.69

Creates an asynchronous task to call the PBinaryBd method with the arguments provided. (Async methods are available starting in Chilkat v9.5.0.52.)

Note: Async method event callbacks happen in the background thread. Accessing and updating UI elements existing in the main thread may require special considerations.

Returns Nothing on failure

How to Run an Asynchronous Task

How to Return an Object from an Async Task

Function PostBinary(ByVal url As String, ByVal byteData As Byte(), ByVal contentType As String, ByVal md5 As Boolean, ByVal gzip As Boolean) As String

Sends an HTTP POST request to the url. The body of the HTTP request contains the bytes passed in byteData. The contentType is a content type such as "image/gif", "application/pdf", etc. If md5 is True, then a Content-MD5 header is added with the base64 MD5 hash of the byteData. Servers aware of the Content-MD5 header will perform a message integrity check to ensure that the data has not been corrupted. If gzip is True, the byteData is compressed using the gzip algorithm. The HTTP request body will contain the GZIP compressed data, and a "Content-Encoding: gzip" header is automatically added to indicate that the request data needs to be ungzipped when received (at the server).

Returns the text body of the HTTP response if the HTTP response has a success status code. Otherwise the method is considered to have failed. If more details of the HTTP response are required, call PBinary instead (which returns the HTTP response object).

Note: The HTTP response code is available in the LastStatus property. Other properties having information include LastResponseHeader, LastResponseBody, LastModDate, LastContentType, etc.

Returns Nothing on failure

Function PostBinaryAsync(ByVal url As String, ByVal byteData As Byte(), ByVal contentType As String, ByVal md5 As Boolean, ByVal gzip As Boolean) As Task

Creates an asynchronous task to call the PostBinary method with the arguments provided. (Async methods are available starting in Chilkat v9.5.0.52.)

Note: Async method event callbacks happen in the background thread. Accessing and updating UI elements existing in the main thread may require special considerations.

Returns Nothing on failure

How to Run an Asynchronous Task

Function PostJson(ByVal url As String, ByVal jsonText As String) As HttpResponse

A simplified way of sending a JSON POST and receiving the JSON response. The HTTP response is returned in an HTTP response object. The content type of the HTTP request is "applicatoin/jsonrequest". To send a JSON POST using "application/json", call the PostJson2 method where the content type can be explicitly provided.

Returns Nothing on failure

HTTP POST JSON

Function PostJsonAsync(ByVal url As String, ByVal jsonText As String) As Task

Creates an asynchronous task to call the PostJson method with the arguments provided. (Async methods are available starting in Chilkat v9.5.0.52.)

Note: Async method event callbacks happen in the background thread. Accessing and updating UI elements existing in the main thread may require special considerations.

Returns Nothing on failure

How to Run an Asynchronous Task

How to Return an Object from an Async Task

Function PostJson2(ByVal url As String, ByVal contentType As String, ByVal jsonText As String) As HttpResponse

The same as PostJson,except it allows for the content type to be explicitly provided. The PostJson method automatically uses "application/jsonrequest". If the application needs for the content type to be "application/json", or some other content type, then PostJson2 provides the means.

Returns Nothing on failure

HTTP POST JSON (application/json)

Function PostJson2Async(ByVal url As String, ByVal contentType As String, ByVal jsonText As String) As Task

Creates an asynchronous task to call the PostJson2 method with the arguments provided. (Async methods are available starting in Chilkat v9.5.0.52.)

Note: Async method event callbacks happen in the background thread. Accessing and updating UI elements existing in the main thread may require special considerations.

Returns Nothing on failure

How to Run an Asynchronous Task

How to Return an Object from an Async Task

Function PostJson3(ByVal url As String, ByVal contentType As String, ByVal json As JsonObject) As HttpResponse

Introduced in version 9.5.0.68

The same as PostJson2,except a JSON object is passed in for the request body.

Returns Nothing on failure

Auth0 Server-to-Server Access Token (Client Credentials flow)

Function PostJson3Async(ByVal url As String, ByVal contentType As String, ByVal json As JsonObject) As Task

Introduced in version 9.5.0.68

Creates an asynchronous task to call the PostJson3 method with the arguments provided. (Async methods are available starting in Chilkat v9.5.0.52.)

Note: Async method event callbacks happen in the background thread. Accessing and updating UI elements existing in the main thread may require special considerations.

Returns Nothing on failure

How to Run an Asynchronous Task

How to Return an Object from an Async Task

Function PostUrlEncoded(ByVal url As String, ByVal req As HttpRequest) As HttpResponse

Sends a simple URL encoded POST. The form parameters are sent in the body of the HTTP request in x-www-form-urlencoded format. The content-type is "application/x-www-form-urlencoded".

Returns Nothing on failure

Duplicating a Simple HTML Form Submission (POST)

HTTP POST x-www-form-urlencoded

Debugging HTTP

PostUrlEncoded Clarified

Function PostUrlEncodedAsync(ByVal url As String, ByVal req As HttpRequest) As Task

Creates an asynchronous task to call the PostUrlEncoded method with the arguments provided. (Async methods are available starting in Chilkat v9.5.0.52.)

Note: Async method event callbacks happen in the background thread. Accessing and updating UI elements existing in the main thread may require special considerations.

Returns Nothing on failure

How to Run an Asynchronous Task

How to Return an Object from an Async Task

Function PostXml(ByVal endpointUrl As String, ByVal xmlContent As String, ByVal xmlCharset As String) As HttpResponse

A simplified way of posting XML content to a web server. This method is good for making SOAP calls using HTTP POST. The xmlCharset should match the character encoding used in the xmlContent, which is typically "utf-8". The HTTP response is returned in an HTTP response object.

Important: This method sends the POST with a "Content-Type" header value of "text/xml". Sometimes a server might require the Content-Type header to be "application/xml". To use "application/xml" instead of the default "text/xml", call SetRequestHeader("Content-Type","application/xml") prior to calling this method.

To use HTTPS simply pass an endpointUrl beginning with "https://" instead of "http://". This applies to any Chilkat method where a URL is passed as an argument.

Returns Nothing on failure

Send XMLHttpRequest and Get Response

Calling a SOAP Web Service using PostXml

Debugging HTTP

Send SOAP 1.2 Request to Web Service Requiring Authentication

Function PostXmlAsync(ByVal endpointUrl As String, ByVal xmlContent As String, ByVal xmlCharset As String) As Task

Creates an asynchronous task to call the PostXml method with the arguments provided. (Async methods are available starting in Chilkat v9.5.0.52.)

Note: Async method event callbacks happen in the background thread. Accessing and updating UI elements existing in the main thread may require special considerations.

Returns Nothing on failure

How to Run an Asynchronous Task

How to Return an Object from an Async Task

Function PText(ByVal verb As String, ByVal url As String, ByVal textData As String, ByVal charset As String, ByVal contentType As String, ByVal md5 As Boolean, ByVal gzip As Boolean) As HttpResponse

Introduced in version 9.5.0.46

Sends an HTTP request to the url. The verb can be "POST", "PUT", "PATCH", etc. The body of the HTTP request contains the text passed in textData. The contentType is a content type such as "text/xml", "application/json", etc. If md5 is True, then a Content-MD5 header is added with the base64 MD5 hash of the textData. Servers aware of the Content-MD5 header will perform a message integrity check to ensure that the data has not been corrupted. If gzip is True, the contentType is compressed using the gzip algorithm. The HTTP request body will contain the GZIP compressed data, and a "Content-Encoding: gzip" header is automatically added to indicate that the request data needs to be ungzipped when received (at the server).

Returns Nothing on failure

Function PTextAsync(ByVal verb As String, ByVal url As String, ByVal textData As String, ByVal charset As String, ByVal contentType As String, ByVal md5 As Boolean, ByVal gzip As Boolean) As Task

Introduced in version 9.5.0.46

Creates an asynchronous task to call the PText method with the arguments provided. (Async methods are available starting in Chilkat v9.5.0.52.)

Note: Async method event callbacks happen in the background thread. Accessing and updating UI elements existing in the main thread may require special considerations.

Returns Nothing on failure

How to Run an Asynchronous Task

How to Return an Object from an Async Task

Function PTextSb(ByVal verb As String, ByVal url As String, ByVal textData As StringBuilder, ByVal charset As String, ByVal contentType As String, ByVal md5 As Boolean, ByVal gzip As Boolean) As HttpResponse

Introduced in version 9.5.0.69

The same as PText, but the data to be uploaded is passed in textData.

Returns Nothing on failure

Upload String to Google Cloud Storage

Function PTextSbAsync(ByVal verb As String, ByVal url As String, ByVal textData As StringBuilder, ByVal charset As String, ByVal contentType As String, ByVal md5 As Boolean, ByVal gzip As Boolean) As Task

Introduced in version 9.5.0.69

Creates an asynchronous task to call the PTextSb method with the arguments provided. (Async methods are available starting in Chilkat v9.5.0.52.)

Note: Async method event callbacks happen in the background thread. Accessing and updating UI elements existing in the main thread may require special considerations.

Returns Nothing on failure

How to Run an Asynchronous Task

How to Return an Object from an Async Task

Function PutBinary(ByVal url As String, ByVal byteData As Byte(), ByVal contentType As String, ByVal md5 As Boolean, ByVal gzip As Boolean) As String

Sends an HTTP PUT request to the url. The body of the HTTP request is byteData. The contentType is a content type such as "image/gif", "application/pdf", etc. If md5 is True, then a Content-MD5 header is added with the base64 MD5 hash of the byteData. Servers aware of the Content-MD5 header will perform a message integrity check to ensure that the data has not been corrupted. If gzip is True, the byteData is compressed using the gzip algorithm. The HTTP request body will contain the GZIP compressed data, and a "Content-Encoding: gzip" header is automatically added to indicate that the request data needs to be ungzipped when received (at the server).

Returns the text body of the HTTP response if the HTTP response has a success status code. Otherwise the method is considered to have failed. If more details of the HTTP response are required, call PBinary instead (which returns the HTTP response object).

Returns Nothing on failure

Function PutBinaryAsync(ByVal url As String, ByVal byteData As Byte(), ByVal contentType As String, ByVal md5 As Boolean, ByVal gzip As Boolean) As Task

Creates an asynchronous task to call the PutBinary method with the arguments provided. (Async methods are available starting in Chilkat v9.5.0.52.)

Note: Async method event callbacks happen in the background thread. Accessing and updating UI elements existing in the main thread may require special considerations.

Returns Nothing on failure

How to Run an Asynchronous Task

Function PutText(ByVal url As String, ByVal textData As String, ByVal charset As String, ByVal contentType As String, ByVal md5 As Boolean, ByVal gzip As Boolean) As String

Sends an HTTP PUT request to the url. The body of the HTTP request is textData. The charset should be set to a charset name such as "iso-8859-1", "windows-1252", "Shift_JIS", "utf-8", etc. The string "ansi" may also be used as a charset name. The contentType is a content type such as "text/plain", "text/xml", etc. If md5 is True, then a Content-MD5 header is added with the base64 MD5 hash of the textData. Servers aware of the Content-MD5 header will perform a message integrity check to ensure that the data has not been corrupted. If gzip is True, the textData is compressed using the gzip algorithm. The HTTP request body will contain the GZIP compressed data, and a "Content-Encoding: gzip" header is automatically added to indicate that the request data needs to be ungzipped when received (at the server).

Returns the text body of the HTTP response if the HTTP response has a success status code. Otherwise the method is considered to have failed. If more details of the HTTP response are required, call PText instead (which returns the HTTP response object).

Returns Nothing on failure

HTTP PUT JSON

Function PutTextAsync(ByVal url As String, ByVal textData As String, ByVal charset As String, ByVal contentType As String, ByVal md5 As Boolean, ByVal gzip As Boolean) As Task

Creates an asynchronous task to call the PutText method with the arguments provided. (Async methods are available starting in Chilkat v9.5.0.52.)

Note: Async method event callbacks happen in the background thread. Accessing and updating UI elements existing in the main thread may require special considerations.

Returns Nothing on failure

How to Run an Asynchronous Task

Function QuickDeleteStr(ByVal url As String) As String

Same as QuickGetStr, but uses the HTTP DELETE method instead of the GET method.

Note: The HTTP response code is available in the LastStatus property. Other properties having information include LastResponseHeader, LastResponseBody, LastModDate, LastContentType, etc.

Returns Nothing on failure

Debugging HTTP

Function QuickDeleteStrAsync(ByVal url As String) As Task

Creates an asynchronous task to call the QuickDeleteStr method with the arguments provided. (Async methods are available starting in Chilkat v9.5.0.52.)

Note: Async method event callbacks happen in the background thread. Accessing and updating UI elements existing in the main thread may require special considerations.

Returns Nothing on failure

How to Run an Asynchronous Task

Function QuickGet(ByVal url As String) As Byte()

Sends an HTTP GET request for a URL and returns the response body as a byte array. The URL may contain query parameters. If the SendCookies property is true, matching cookies previously persisted to the CookiesDir are automatically included in the request. If the FetchFromCache property is true, the page may be fetched directly from cache. Because the URL can specify any type of resource (HTML page, GIF image, etc.) the return value is a byte array. If the resource is known to be a string, such as with an HTML page, you may call QuickGetStr instead. If the HTTP request fails, a zero-length byte array is returned and error information can be found in the LastErrorText, LastErrorXml, or LastErrorHtml properties.

Note: The HTTP response code is available in the LastStatus property. Other properties having information include LastResponseHeader, LastResponseBody, LastModDate, LastContentType, etc.

Returns an empty byte array on failure

Facebook Download all Photos to Local Files

Download a Zip from a URL and OpenFromMemory. (No .zip fie is created)

Function QuickGetAsync(ByVal url As String) As Task

Creates an asynchronous task to call the QuickGet method with the arguments provided. (Async methods are available starting in Chilkat v9.5.0.52.)

Note: Async method event callbacks happen in the background thread. Accessing and updating UI elements existing in the main thread may require special considerations.

Returns Nothing on failure

How to Run an Asynchronous Task

Function QuickGetBd(ByVal url As String, ByVal binData As BinData) As Boolean

Introduced in version 9.5.0.64

The same as QuickGet, but returns the content in a Chilkat BinData object. The existing content of binData, if any, is cleared and replaced with the downloaded content.

Returns True for success, False for failure.

Create Enveloping XML Digital Signature

Function QuickGetBdAsync(ByVal url As String, ByVal binData As BinData) As Task

Introduced in version 9.5.0.64

Creates an asynchronous task to call the QuickGetBd method with the arguments provided. (Async methods are available starting in Chilkat v9.5.0.52.)

Note: Async method event callbacks happen in the background thread. Accessing and updating UI elements existing in the main thread may require special considerations.

Returns Nothing on failure

How to Run an Asynchronous Task

Function QuickGetObj(ByVal url As String) As HttpResponse

Sends an HTTP GET request for a URL and returns the response object. If the SendCookies property is True, matching cookies previously persisted to the CookiesDir are automatically included in the request. If the FetchFromCache property is True, the page could be fetched directly from cache.

Returns Nothing on failure

Getting the HTTP Response after an Asynchronous HTTP Request Completes

Function QuickGetObjAsync(ByVal url As String) As Task

Creates an asynchronous task to call the QuickGetObj method with the arguments provided. (Async methods are available starting in Chilkat v9.5.0.52.)

Note: Async method event callbacks happen in the background thread. Accessing and updating UI elements existing in the main thread may require special considerations.

Returns Nothing on failure

How to Run an Asynchronous Task

How to Return an Object from an Async Task

Function QuickGetSb(ByVal url As String, ByVal sbContent As StringBuilder) As Boolean

Introduced in version 9.5.0.64

The same as QuickGetStr, but returns the content in a Chilkat StringBuilder object. The existing content of sbContent, if any, is cleared and replaced with the downloaded content.

Returns True for success, False for failure.

Function QuickGetSbAsync(ByVal url As String, ByVal sbContent As StringBuilder) As Task

Introduced in version 9.5.0.64

Creates an asynchronous task to call the QuickGetSb method with the arguments provided. (Async methods are available starting in Chilkat v9.5.0.52.)

Note: Async method event callbacks happen in the background thread. Accessing and updating UI elements existing in the main thread may require special considerations.

Returns Nothing on failure

How to Run an Asynchronous Task

Function QuickGetStr(ByVal url As String) As String

Sends an HTTP GET request for a URL and returns the response body as a string. The URL may contain query parameters. If the SendCookies property is True, matching cookies previously persisted to the CookiesDir are automatically included in the request. If the FetchFromCache property is True, the page could be fetched directly from cache. If the HTTP request fails, a Nothing value is returned and error information can be found in the LastErrorText, LastErrorXml, or LastErrorHtml properties.

Note: The HTTP response code is available in the LastStatus property. Other properties having information include LastResponseHeader, LastResponseBody, LastModDate, LastContentType, etc.

Returns Nothing on failure

HTTP GET - Download HTML or any Text Content to a String

HTTPS GET using SSL/TLS

Function QuickGetStrAsync(ByVal url As String) As Task

Creates an asynchronous task to call the QuickGetStr method with the arguments provided. (Async methods are available starting in Chilkat v9.5.0.52.)

Note: Async method event callbacks happen in the background thread. Accessing and updating UI elements existing in the main thread may require special considerations.

Returns Nothing on failure

How to Run an Asynchronous Task

Function QuickPutStr(ByVal url As String) As String

Same as QuickGetStr, but uses the HTTP PUT method instead of the GET method.

Note: The HTTP response code is available in the LastStatus property. Other properties having information include LastResponseHeader, LastResponseBody, LastModDate, LastContentType, etc.

Returns Nothing on failure

Debugging HTTP

Function QuickPutStrAsync(ByVal url As String) As Task

Creates an asynchronous task to call the QuickPutStr method with the arguments provided. (Async methods are available starting in Chilkat v9.5.0.52.)

Note: Async method event callbacks happen in the background thread. Accessing and updating UI elements existing in the main thread may require special considerations.

Returns Nothing on failure

How to Run an Asynchronous Task

Function RemoveQuickHeader(ByVal headerFieldName As String) As Boolean

Removes a header from the internal list of custom header field name/value pairs to be automatically added when HTTP requests are sent via methods that do not use the HTTP request object. (The AddQuickHeader method is called to add custom header fields.)

* Note: This method is deprecated. It is identical to the RemoveRequestHeader method. The RemoveRequestHeader method should be called instead because this method will be removed in a future version.

Returns True for success, False for failure.

Sub RemoveRequestHeader(ByVal name As String)

Removes a header from the internal list of custom header field name/value pairs to be automatically added when HTTP requests are sent via methods that do not use the HTTP request object. (The SetRequestHeader method is called to add custom header fields.)

Function RenderGet(ByVal url As String) As String

Same as QuickGet, but does not send the HTTP GET. Instead, it builds the HTTP request that would've been sent and returns it.

Returns Nothing on failure

Function ResumeDownload(ByVal url As String, ByVal targetFilename As String) As Boolean

Same as the Download method, except a failed download may be resumed. The targetFilename is automatically checked and if it exists, the download will resume at the point where it previously failed. ResumeDownload may be called any number of times until the full download is complete.

Returns True for success, False for failure.

Function ResumeDownloadAsync(ByVal url As String, ByVal targetFilename As String) As Task

Creates an asynchronous task to call the ResumeDownload method with the arguments provided. (Async methods are available starting in Chilkat v9.5.0.52.)

Note: Async method event callbacks happen in the background thread. Accessing and updating UI elements existing in the main thread may require special considerations.

Returns Nothing on failure

How to Run an Asynchronous Task

Function S3_CreateBucket(ByVal bucketPath As String) As Boolean

Creates a new Amazon S3 bucket.

Note: x-amz-* headers, including metadata, can be added to any S3 request by adding each header with a call to SetRequestHeader. This applies to all S3 methods, even if not explicitly stated.

Returns True for success, False for failure.

S3 Create Bucket Example

Function S3_CreateBucketAsync(ByVal bucketPath As String) As Task

Creates an asynchronous task to call the S3_CreateBucket method with the arguments provided. (Async methods are available starting in Chilkat v9.5.0.52.)

Note: Async method event callbacks happen in the background thread. Accessing and updating UI elements existing in the main thread may require special considerations.

Returns Nothing on failure

How to Run an Asynchronous Task

Function S3_DeleteBucket(ByVal bucketPath As String) As Boolean

Deletes an Amazon S3 bucket.

Returns True for success, False for failure.

S3 Delete Bucket

Function S3_DeleteBucketAsync(ByVal bucketPath As String) As Task

Creates an asynchronous task to call the S3_DeleteBucket method with the arguments provided. (Async methods are available starting in Chilkat v9.5.0.52.)

Note: Async method event callbacks happen in the background thread. Accessing and updating UI elements existing in the main thread may require special considerations.

Returns Nothing on failure

How to Run an Asynchronous Task

Function S3_DeleteMultipleObjects(ByVal bucketName As String, ByVal objectNames As StringArray) As HttpResponse

Introduced in version 9.5.0.47

Deletes multiple objects from a bucket using a single HTTP request. The bucketName contains the names (also known as "keys") of the objects to be deleted. To delete a specific version of an object, append a versionId attribute to the object name. For example: "SampleDocument.txt; VersionId="OYcLXagmS.WaD..oyH4KRguB95_YhLs7""

Returns Nothing on failure

Delete Multiple Objects Example

Function S3_DeleteMultipleObjectsAsync(ByVal bucketName As String, ByVal objectNames As StringArray) As Task

Introduced in version 9.5.0.47

Creates an asynchronous task to call the S3_DeleteMultipleObjects method with the arguments provided. (Async methods are available starting in Chilkat v9.5.0.52.)

Note: Async method event callbacks happen in the background thread. Accessing and updating UI elements existing in the main thread may require special considerations.

Returns Nothing on failure

How to Run an Asynchronous Task

How to Return an Object from an Async Task

Function S3_DeleteObject(ByVal bucketPath As String, ByVal objectName As String) As Boolean

Deletes a remote file (object) on the Amazon S3 service.

Returns True for success, False for failure.

S3 Delete File

Function S3_DeleteObjectAsync(ByVal bucketPath As String, ByVal objectName As String) As Task

Creates an asynchronous task to call the S3_DeleteObject method with the arguments provided. (Async methods are available starting in Chilkat v9.5.0.52.)

Note: Async method event callbacks happen in the background thread. Accessing and updating UI elements existing in the main thread may require special considerations.

Returns Nothing on failure

How to Run an Asynchronous Task

Function S3_DownloadBytes(ByVal bucketPath As String, ByVal objectName As String) As Byte()

The same as DownloadFile, except the file data is returned directly in-memory instead of being written to a local file.

Returns an empty byte array on failure

Demonstrate S3_DownloadBytes

Function S3_DownloadBytesAsync(ByVal bucketPath As String, ByVal objectName As String) As Task

Creates an asynchronous task to call the S3_DownloadBytes method with the arguments provided. (Async methods are available starting in Chilkat v9.5.0.52.)

Note: Async method event callbacks happen in the background thread. Accessing and updating UI elements existing in the main thread may require special considerations.

Returns Nothing on failure

How to Run an Asynchronous Task

Function S3_DownloadFile(ByVal bucketPath As String, ByVal objectName As String, ByVal localFilePath As String) As Boolean

Downloads a file from the Amazon S3 service.

Returns True for success, False for failure.

S3 Download File Example

Function S3_DownloadFileAsync(ByVal bucketPath As String, ByVal objectName As String, ByVal localFilePath As String) As Task

Creates an asynchronous task to call the S3_DownloadFile method with the arguments provided. (Async methods are available starting in Chilkat v9.5.0.52.)

Note: Async method event callbacks happen in the background thread. Accessing and updating UI elements existing in the main thread may require special considerations.

Returns Nothing on failure

How to Run an Asynchronous Task

Function S3_DownloadString(ByVal bucketPath As String, ByVal objectName As String, ByVal charset As String) As String

Downloads a text file (object) from the Amazon S3 service directly into a string variable. The charset specifies the character encoding, such as "utf-8", of the remote text object.

Returns Nothing on failure

S3 Download String Object

Function S3_DownloadStringAsync(ByVal bucketPath As String, ByVal objectName As String, ByVal charset As String) As Task

Creates an asynchronous task to call the S3_DownloadString method with the arguments provided. (Async methods are available starting in Chilkat v9.5.0.52.)

Note: Async method event callbacks happen in the background thread. Accessing and updating UI elements existing in the main thread may require special considerations.

Returns Nothing on failure

How to Run an Asynchronous Task

Function S3_FileExists(ByVal bucketPath As String, ByVal objectName As String) As Integer

Determines if a remote object (file) exists. Returns 1 if the file exists, 0 if it does not exist, -1 if there was a failure in checking, or 2 if using in asynchronous mode to indicate that the background task was successfully started.

Read S3 Object Metadata of File Already Uploaded to S3

Function S3_FileExistsAsync(ByVal bucketPath As String, ByVal objectName As String) As Task

Creates an asynchronous task to call the S3_FileExists method with the arguments provided. (Async methods are available starting in Chilkat v9.5.0.52.)

Note: Async method event callbacks happen in the background thread. Accessing and updating UI elements existing in the main thread may require special considerations.

Returns Nothing on failure

How to Run an Asynchronous Task

Function S3_GenerateUrl(ByVal bucket As String, ByVal path As String, ByVal expire As CkDateTime) As String

Introduced in version 9.5.0.46

Generates a temporary pre-signed URL for Amazon S3 using AWS Signature V2. (Call S3_GenerateUrlV4 to generate AWS Signature V4 pre-signed URLs.) Requires that the AwsSecretKey and AwsAccessKey be set to valid values prior to calling this method.

Note: This method can only generate URLs that are for HTTP GET requests (i.e. URLs you can paste into a browser address bar). This method does not generate URLs for POST, PUT, DELETE, etc.

Returns Nothing on failure

Generate S3 Signed URL

Function S3_GenerateUrlV4(ByVal useHttps As Boolean, ByVal bucketName As String, ByVal path As String, ByVal numSecondsValid As Integer, ByVal awsService As String) As String

Introduced in version 9.5.0.66

Generates a temporary pre-signed URL for Amazon S3 using AWS Signature V4. (Call S3_GenerateUrl to generate AWS Signature V2 pre-signed URLs.) Requires that the AwsSecretKey, AwsAccessKey, and AwsRegion properties be set to valid values prior to calling this method. Also requires the AwsEndpoint property to be set if the endpoint is different than "s3.amazonaws.com".

The URL that is generated has this format:

https:////
?X-Amz-Algorithm=AWS4-HMAC-SHA256
&X-Amz-Credential=////aws4_request
&X-Amz-Date=
&X-Amz-Expires=
&X-Amz-SignedHeaders=host
&X-Amz-Signature=  

The awsService is a string naming the AWS service, such as "s3". If useHttps is True, then the URL begins with "https://", otherwise it begins with "http://".

Note: This method can only generate URLs that are for HTTP GET requests (i.e. URLs you can paste into a browser address bar). This method does not generate URLs for POST, PUT, DELETE, etc.

Returns Nothing on failure

Generate an AWS (S3) Pre-Signed URL using Signature V4

Function S3_ListBucketObjects(ByVal bucketPath As String) As String

Retrieves the XML listing of the objects contained within an Amazon S3 bucket. (This is like a directory listing, but in XML format.)

The bucketPath name may be qualified with URL-encoded params. For example, to list the objects in a bucket named "ChilkatABC" with max-keys = 2000 and marker = "xyz", call S3_ListBucketObject passing the following string for bucketPath: "ChilkatABC?max-keys=2000&marker=xyz"

The S3_ListBucketObjects method recognized all params listed in the AWS documentation for listing objects in a bucket: delimiter, marker, max-keys, and prefix. See Amazon's AWS online documentation for more information.

Returns Nothing on failure

S3 List Objects in Bucket

Function S3_ListBucketObjectsAsync(ByVal bucketPath As String) As Task

Creates an asynchronous task to call the S3_ListBucketObjects method with the arguments provided. (Async methods are available starting in Chilkat v9.5.0.52.)

Note: Async method event callbacks happen in the background thread. Accessing and updating UI elements existing in the main thread may require special considerations.

Returns Nothing on failure

How to Run an Asynchronous Task

Function S3_ListBuckets() As String

Retrieves the XML listing of the buckets for an Amazon S3 account.

Returns Nothing on failure

S3 List Buckets Example

Function S3_ListBucketsAsync() As Task

Creates an asynchronous task to call the S3_ListBuckets method with the arguments provided. (Async methods are available starting in Chilkat v9.5.0.52.)

Note: Async method event callbacks happen in the background thread. Accessing and updating UI elements existing in the main thread may require special considerations.

Returns Nothing on failure

How to Run an Asynchronous Task

Function S3_UploadBytes(ByVal contentBytes As Byte(), ByVal contentType As String, ByVal bucketPath As String, ByVal objectName As String) As Boolean

The same as S3_UploadFile, except the contents of the file come from contentBytes instead of a local file.

Note: x-amz-* headers, including metadata, can be added to any S3 request by adding each header with a call to SetRequestHeader. This applies to all S3 methods, even if not explicitly stated.

Returns True for success, False for failure.

Demonstrate S3_UploadBytes

Function S3_UploadBytesAsync(ByVal contentBytes As Byte(), ByVal contentType As String, ByVal bucketPath As String, ByVal objectName As String) As Task

Creates an asynchronous task to call the S3_UploadBytes method with the arguments provided. (Async methods are available starting in Chilkat v9.5.0.52.)

Note: Async method event callbacks happen in the background thread. Accessing and updating UI elements existing in the main thread may require special considerations.

Returns Nothing on failure

How to Run an Asynchronous Task

Function S3_UploadFile(ByVal localFilePath As String, ByVal contentType As String, ByVal bucketPath As String, ByVal objectName As String) As Boolean

Uploads a file to the Amazon S3 service.

Note: x-amz-* headers, including metadata, can be added to any S3 request by adding each header with a call to SetRequestHeader. This applies to all S3 methods, even if not explicitly stated.

Returns True for success, False for failure.

S3 Upload File

Function S3_UploadFileAsync(ByVal localFilePath As String, ByVal contentType As String, ByVal bucketPath As String, ByVal objectName As String) As Task

Creates an asynchronous task to call the S3_UploadFile method with the arguments provided. (Async methods are available starting in Chilkat v9.5.0.52.)

Note: Async method event callbacks happen in the background thread. Accessing and updating UI elements existing in the main thread may require special considerations.

Returns Nothing on failure

How to Run an Asynchronous Task

Function S3_UploadString(ByVal objectContent As String, ByVal charset As String, ByVal contentType As String, ByVal bucketPath As String, ByVal objectName As String) As Boolean

Uploads an in-memory string to the Amazon S3 service. This is the same as UploadFile, except that the file contents are from an in-memory string instead of a local file. Internal to this method, the objectContent is converted to the character encoding specified by charset prior to uploading.

Note: x-amz-* headers, including metadata, can be added to any S3 request by adding each header with a call to SetRequestHeader. This applies to all S3 methods, even if not explicitly stated.

Returns True for success, False for failure.

S3 Upload String

Function S3_UploadStringAsync(ByVal objectContent As String, ByVal charset As String, ByVal contentType As String, ByVal bucketPath As String, ByVal objectName As String) As Task

Creates an asynchronous task to call the S3_UploadString method with the arguments provided. (Async methods are available starting in Chilkat v9.5.0.52.)

Note: Async method event callbacks happen in the background thread. Accessing and updating UI elements existing in the main thread may require special considerations.

Returns Nothing on failure

How to Run an Asynchronous Task

Function SaveLastError(ByVal path As String) As Boolean

Saves the last-error information (the contents of LastErrorXml) to an XML formatted file.

Returns True for success, False for failure.

Function SetCookieXml(ByVal domain As String, ByVal cookieXml As String) As Boolean

Restores cookies for a particular domain. It is assumed that the cookie XML was previously retrieved via the GetCookieXml method, and saved to some sort of persistent storage, such as within a database table. It is then possible for an application to restore the cookies by calling this method.

Returns True for success, False for failure.

Function SetOAuthRsaKey(ByVal privKey As PrivateKey) As Boolean

Introduced in version 9.5.0.39

Sets the RSA key to be used with OAuth authentication when the RSA-SHA1 OAuth signature method is used (see the OAuthSigMethod property).

Returns True for success, False for failure.

Function SetPassword(ByVal password As SecureString) As Boolean

Introduced in version 9.5.0.71

Equivalent to setting the Password property, but provides for a more secure way of passing the password in a secure string object.

Returns True for success, False for failure.

HTTP Basic Auth with Secure Strings

Sub SetRequestHeader(ByVal headerFieldName As String, ByVal headerFieldValue As String)

Adds a custom header field to any HTTP request sent by a method that does not use the HTTP request object. These methods include Download, DownloadAppend, GetHead, PostBinary, PostMime, PostXml, PutBinary, PutText, QuickDeleteStr, QuickGet, QuickGetObj, QuickGetStr, QuickPutStr, XmlRpc, and XmlRpcPut.

Cookies may be explictly added by calling this method passing "Cookie" for the headerFieldName.

The RemoveRequestHeader method can be called to remove a custom header.

Note: Never explicitly set the Content-Length header field. Chilkat will automatically compute the correct length and add the Content-Length header to all POST, PUT, or any other request where the Content-Length needs to be specified. (GET requests always have a 0 length body, and therefore never need a Content-Length header field.)

Note: To add more than one header, call this method once per header field.

Add Custom Header to HTTP GET

Function SetSslClientCert(ByVal cert As Cert) As Boolean

Allows for a client-side certificate to be used for an SSL connection.

Returns True for success, False for failure.

HTTP TLS Mutual Authentication (Client-Side Certificate)

Function SetSslClientCertPem(ByVal pemDataOrPath As String, ByVal pemPassword As String) As Boolean

Allows for a client-side certificate + private key to be used for the SSL / TLS connection (often called 2-way SSL).

Returns True for success, False for failure.

How to Create a PEM that Contains Certificates and a Private Key

HTTP TLS Mutual Authentication (Client-Side Certificate)

Function SetSslClientCertPfx(ByVal pfxPath As String, ByVal pfxPassword As String) As Boolean

Allows for a client-side certificate + private key to be used for the SSL / TLS connection (often called 2-way SSL).

Returns True for success, False for failure.

HTTP TLS Mutual Authentication (Client-Side Certificate)

Function SetUrlVar(ByVal name As String, ByVal value As String) As Boolean

Introduced in version 9.5.0.67

Sets the value of a variable for substitutions in URLs passed to any method. Variables can appear in URLs in the following format: {$varName}. For example: https://graph.microsoft.com/v1.0/users/{$id}

Returns True for success, False for failure.

Sub SleepMs(ByVal millisec As Integer)

Convenience method to force the calling process to sleep for a number of milliseconds.

Function SynchronousRequest(ByVal domain As String, ByVal port As Integer, ByVal ssl As Boolean, ByVal req As HttpRequest) As HttpResponse

Sends an explicit HttpRequest to an HTTP server and returns an HttpResponse object. The HttpResponse object provides full access to the response including all headers and the response body. This method may be used to send POST requests, as well as GET, HEAD, file uploads, and XMLHTTP. To send via HTTPS (i.e. TLS), set the ssl property = True. Otherwise set it to False.

Returns Nothing on failure

How URL Syntax Relates to SynchronousRequest

WebDAV PROPFIND using SynchronousRequest

Simple HTTP POST

Debugging HTTP

Send XMLHttpRequest using PUT, GET, DELETE, or any HTTP Request Method

Adding Cookies to an HTTP Request

HTTP multipart/form-data Upload

Parse a URL into its Component Parts

SOAP with MTOM XOP Attachment

Function SynchronousRequestAsync(ByVal domain As String, ByVal port As Integer, ByVal ssl As Boolean, ByVal req As HttpRequest) As Task

Creates an asynchronous task to call the SynchronousRequest method with the arguments provided. (Async methods are available starting in Chilkat v9.5.0.52.)

Note: Async method event callbacks happen in the background thread. Accessing and updating UI elements existing in the main thread may require special considerations.

Returns Nothing on failure

Asynchronous HTTP SOAP 1.2 Request and Response using POST

Function UnlockComponent(ByVal unlockCode As String) As Boolean

Unlocks the Http class/component. It is necessary to call Http.UnlockComponent before calling any other methods. Passing any string to UnlockComponent will automatically activate a 30-day trial period.

Returns True for success, False for failure.

Diagnosing UnlockComponent Problems

UnlockComponent LastErrorText shows exact string passed to it.

Verify UnlockComponent Success w/ Purchased Unlock Code

LastErrorText Standard Information

Function UrlDecode(ByVal str As String) As String

URL decodes a string.

Returns Nothing on failure

Function UrlEncode(ByVal str As String) As String

URL encodes a string.

Returns Nothing on failure

Function XmlRpc(ByVal urlEndpoint As String, ByVal xmlIn As String) As String

Makes an XML RPC call to a URL endpoint. The XML string is passed in an HTTP POST, and the XML response is returned.

Returns Nothing on failure

HTTP XMLRPC Example

Function XmlRpcAsync(ByVal urlEndpoint As String, ByVal xmlIn As String) As Task

Creates an asynchronous task to call the XmlRpc method with the arguments provided. (Async methods are available starting in Chilkat v9.5.0.52.)

Note: Async method event callbacks happen in the background thread. Accessing and updating UI elements existing in the main thread may require special considerations.

Returns Nothing on failure

How to Run an Asynchronous Task

Function XmlRpcPut(ByVal urlEndpoint As String, ByVal xmlIn As String) As String

Same as XmlRpc, but uses the HTTP PUT method instead of the POST method.

Returns Nothing on failure

Function XmlRpcPutAsync(ByVal urlEndpoint As String, ByVal xmlIn As String) As Task

Creates an asynchronous task to call the XmlRpcPut method with the arguments provided. (Async methods are available starting in Chilkat v9.5.0.52.)

Note: Async method event callbacks happen in the background thread. Accessing and updating UI elements existing in the main thread may require special considerations.

Returns Nothing on failure

How to Run an Asynchronous Task

Events

Event OnAbortCheck

Provides the opportunity for a method call to be aborted. The AbortCheck event is fired periodically based on the value of the HeartbeatMs property. If HeartbeatMs is 0, then no AbortCheck events will fire. As an example, to fire 5 AbortCheck events per second, set the HeartbeatMs property equal to 200.

Args are passed using Chilkat.AbortCheckEventArgs

Event callback implementation:

Dim WithEvents http As Chilkat.Http

Private Sub http_OnAbortCheck(sender As Object, args As Chilkat.AbortCheckEventArgs) Handles http.OnAbortCheck

    ...

End Sub

Event OnBinaryData

Binary data provided by certain methods.

Args are passed using Chilkat.BinaryDataEventArgs

Event callback implementation:

Dim WithEvents http As Chilkat.Http

Private Sub http_OnBinaryData(sender As Object, args As Chilkat.BinaryDataEventArgs) Handles http.OnBinaryData

    ...

End Sub

Event OnHttpBeginReceive

This event is fired just before beginning to read the HTTP response.

Event callback implementation:

Dim WithEvents http As Chilkat.Http

    ...

Private Sub http_OnHttpBeginReceive(sender As Object, args As EventArgs) Handles http.OnHttpBeginReceive

...

End Sub

Event OnHttpBeginSend

This event is fired just before the HTTP request is about to be sent.

Event callback implementation:

Dim WithEvents http As Chilkat.Http

    ...

Private Sub http_OnHttpBeginSend(sender As Object, args As EventArgs) Handles http.OnHttpBeginSend

...

End Sub

Event OnHttpChunked

Called when the received response is in chunked format.

Event callback implementation:

Dim WithEvents http As Chilkat.Http

    ...

Private Sub http_OnHttpChunked(sender As Object, args As EventArgs) Handles http.OnHttpChunked

...

End Sub

Event OnHttpEndReceive

This event is fired after the complete HTTP response has been received.

Args are passed using Chilkat.StatusEventArgs

Event callback implementation:

Dim WithEvents http As Chilkat.Http

Private Sub http_OnHttpEndReceive(sender As Object, args As Chilkat.StatusEventArgs) Handles http.OnHttpEndReceive

    ...

End Sub

Event OnHttpEndSend

This event is fired after the complete HTTP request has been sent.

Args are passed using Chilkat.StatusEventArgs

Event callback implementation:

Dim WithEvents http As Chilkat.Http

Private Sub http_OnHttpEndSend(sender As Object, args As Chilkat.StatusEventArgs) Handles http.OnHttpEndSend

    ...

End Sub

Event OnHttpRedirect

Called for each redirect that is followed. The abort may be set to True to abort the HTTP request.

Args are passed using Chilkat.HttpRedirectEventArgs

Event callback implementation:

Dim WithEvents http As Chilkat.Http

Private Sub http_OnHttpRedirect(sender As Object, args As Chilkat.HttpRedirectEventArgs) Handles http.OnHttpRedirect

    ...

End Sub

Event OnPercentDone

Provides the percentage completed for any method that involves network communications or time-consuming processing (assuming it is a method where a percentage completion can be measured). This event is only fired when it is possible to know a percentage completion, and when it makes sense to express the operation as a percentage completed. The pctDone argument will have a value from 1 to 100. For operations (Chilkat method calls) that complete very quickly, the number of PercentDone callbacks will vary, but the final callback should have a value of 100. For long running operations, no more than one callback per percentage point will occur (for example: 1, 2, 3, ... 98, 99, 100).

The PercentDone callback counts as an AbortCheck event. For method calls that complete quickly such that PercentDone events fire, it may be that AbortCheck events don't fire because the opportunity to abort is already provided in the PercentDone callback. For time consuming operations, where the amount of time between PercentDone callbacks are long, AbortCheck callbacks may be used to allow for the operation to be aborted in a more responsive manner.

The abort output argument provides a means for aborting the operation. Setting it to True will cause the method to abort and return a failed status (or whatever return value indicates failure).

Args are passed using Chilkat.PercentDoneEventArgs

Event callback implementation:

Dim WithEvents http As Chilkat.Http

Private Sub http_OnPercentDone(sender As Object, args As Chilkat.PercentDoneEventArgs) Handles http.OnPercentDone

    ...

End Sub

Event OnProgressInfo

A general name/value event that provides information about what is happening during a method call. To find out what information is available, write code to handle this event and log the name/value pairs. Most are self-explanatory.

Args are passed using Chilkat.ProgressInfoEventArgs

Event callback implementation:

Dim WithEvents http As Chilkat.Http

Private Sub http_OnProgressInfo(sender As Object, args As Chilkat.ProgressInfoEventArgs) Handles http.OnProgressInfo

    ...

End Sub

Event OnReceiveRate

Periodicallly called with information about the download performance (i.e. the receiving of the HTTP response). The byteCount is the cumulative number of bytes downloaded so far. The bytesPerSec is the current transfer rate in bytes per second.

Args are passed using Chilkat.DataRateEventArgs

Event callback implementation:

Dim WithEvents http As Chilkat.Http

Private Sub http_OnReceiveRate(sender As Object, args As Chilkat.DataRateEventArgs) Handles http.OnReceiveRate

    ...

End Sub

Event OnSendRate

Called periodically with upload progress information: The byteCount is the cumulative number of bytes uploaded so far. The bytesPerSec is the current transfer rate in bytes per second.

Args are passed using Chilkat.DataRateEventArgs

Event callback implementation:

Dim WithEvents http As Chilkat.Http

Private Sub http_OnSendRate(sender As Object, args As Chilkat.DataRateEventArgs) Handles http.OnSendRate

    ...

End Sub

Event OnTaskCompleted

Called in the background thread when an asynchronous task completes.

VB.NET TaskCompleted Event Callback Example

Args are passed using Chilkat.TaskCompletedEventArgs

Event callback implementation:

Dim WithEvents http As Chilkat.Http

Private Sub http_OnTaskCompleted(sender As Object, args As Chilkat.TaskCompletedEventArgs) Handles http.OnTaskCompleted

    ...

End Sub

Event OnTextData

Text data provided by certain methods.

Args are passed using Chilkat.TextDataEventArgs

Event callback implementation:

Dim WithEvents http As Chilkat.Http

Private Sub http_OnTextData(sender As Object, args As Chilkat.TextDataEventArgs) Handles http.OnTextData

    ...

End Sub