HttpRequest Unicode C Reference Documentation

HttpRequest

Current Version: 9.5.0.97

Represents a complete HTTP request.

Create/Dispose

HCkHttpRequestW instance = CkHttpRequestW_Create();
// ...
CkHttpRequestW_Dispose(instance);
HCkHttpRequestW CkHttpRequestW_Create(void);

Creates an instance of the HCkHttpRequestW object and returns a handle ("void *" pointer). The handle is passed in the 1st argument for the functions listed on this page.

void CkHttpRequestW_Dispose(HCkHttpRequestW handle);

Objects created by calling CkHttpRequestW_Create must be freed by calling this method. A memory leak occurs if a handle is not disposed by calling this function. Also, any handle returned by a Chilkat "C" function must also be freed by the application by calling the appropriate Dispose method, such as CkHttpRequestW_Dispose.

Properties

Boundary
void CkHttpRequestW_getBoundary(HCkHttpRequestW cHandle, HCkString retval);
void CkHttpRequestW_putBoundary(HCkHttpRequestW cHandle, const wchar_t *newVal);
const wchar_t *CkHttpRequestW_boundary(HCkHttpRequestW cHandle);
Introduced in version 9.5.0.49

Sets an explicit boundary string to be used in multipart/form-data requests. If no Boundary is set, then a boundary string is automaticaly generated as needed during the sending of a request.

More Information and Examples
top
Charset
void CkHttpRequestW_getCharset(HCkHttpRequestW cHandle, HCkString retval);
void CkHttpRequestW_putCharset(HCkHttpRequestW cHandle, const wchar_t *newVal);
const wchar_t *CkHttpRequestW_charset(HCkHttpRequestW cHandle);

Controls the character encoding used for HTTP request parameters for POST requests. The default value is the ANSI charset of the computer. The charset should match the charset expected by the form target.

The "charset" attribute is only included in the Content-Type header of the request if the SendCharset property is set to TRUE.

top
ContentType
void CkHttpRequestW_getContentType(HCkHttpRequestW cHandle, HCkString retval);
void CkHttpRequestW_putContentType(HCkHttpRequestW cHandle, const wchar_t *newVal);
const wchar_t *CkHttpRequestW_contentType(HCkHttpRequestW cHandle);

The ContentType property sets the "Content-Type" header field, and identifies the content-type of the HTTP request body. Common values are:

application/x-www-form-urlencoded
multipart/form-data
application/json
application/xml
If ContentType is set equal to the empty string, then no Content-Type header is included in the HTTP request.

top
DebugLogFilePath
void CkHttpRequestW_getDebugLogFilePath(HCkHttpRequestW cHandle, HCkString retval);
void CkHttpRequestW_putDebugLogFilePath(HCkHttpRequestW cHandle, const wchar_t *newVal);
const wchar_t *CkHttpRequestW_debugLogFilePath(HCkHttpRequestW cHandle);

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.

top
EntireHeader
void CkHttpRequestW_getEntireHeader(HCkHttpRequestW cHandle, HCkString retval);
void CkHttpRequestW_putEntireHeader(HCkHttpRequestW cHandle, const wchar_t *newVal);
const wchar_t *CkHttpRequestW_entireHeader(HCkHttpRequestW cHandle);

Composes and returns the entire MIME header of the HTTP request.

top
HttpVerb
void CkHttpRequestW_getHttpVerb(HCkHttpRequestW cHandle, HCkString retval);
void CkHttpRequestW_putHttpVerb(HCkHttpRequestW cHandle, const wchar_t *newVal);
const wchar_t *CkHttpRequestW_httpVerb(HCkHttpRequestW cHandle);

The HttpVerb property should be set to the name of the HTTP method that appears on the "start line" of an HTTP request, such as GET, POST, PUT, DELETE, etc. It is also possible to use the various WebDav verbs such as PROPFIND, PROPPATCH, MKCOL, COPY, MOVE, LOCK, UNLOCK, etc. In general, the HttpVerb may be set to anything, even custom verbs recognized by a custom server-side app.

top
HttpVersion
void CkHttpRequestW_getHttpVersion(HCkHttpRequestW cHandle, HCkString retval);
void CkHttpRequestW_putHttpVersion(HCkHttpRequestW cHandle, const wchar_t *newVal);
const wchar_t *CkHttpRequestW_httpVersion(HCkHttpRequestW cHandle);

The HTTP version in the request header. Defaults to "1.1".

top
LastErrorHtml
void CkHttpRequestW_getLastErrorHtml(HCkHttpRequestW cHandle, HCkString retval);
const wchar_t *CkHttpRequestW_lastErrorHtml(HCkHttpRequestW cHandle);

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.

top
LastErrorText
void CkHttpRequestW_getLastErrorText(HCkHttpRequestW cHandle, HCkString retval);
const wchar_t *CkHttpRequestW_lastErrorText(HCkHttpRequestW cHandle);

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.

top
LastErrorXml
void CkHttpRequestW_getLastErrorXml(HCkHttpRequestW cHandle, HCkString retval);
const wchar_t *CkHttpRequestW_lastErrorXml(HCkHttpRequestW cHandle);

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.

top
LastMethodSuccess
BOOL CkHttpRequestW_getLastMethodSuccess(HCkHttpRequestW cHandle);
void CkHttpRequestW_putLastMethodSuccess(HCkHttpRequestW cHandle, BOOL newVal);

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.

top
NumHeaderFields
int CkHttpRequestW_getNumHeaderFields(HCkHttpRequestW cHandle);

Returns the number of request header fields.

top
NumParams
int CkHttpRequestW_getNumParams(HCkHttpRequestW cHandle);

Returns the number of query parameters.

More Information and Examples
top
Path
void CkHttpRequestW_getPath(HCkHttpRequestW cHandle, HCkString retval);
void CkHttpRequestW_putPath(HCkHttpRequestW cHandle, const wchar_t *newVal);
const wchar_t *CkHttpRequestW_path(HCkHttpRequestW cHandle);

The path of the resource requested. A path of "/" indicates the default document of a domain.

Explaining the Parts of a URL

http://example.com:8042/over/there?name=ferret#nose
\__/   \______________/\_________/ \________/ \__/
 |           |            |            |        |
scheme   domain+port     path        query   fragment

This property should be set to the path part of the URL. You may also include the query part in this property value. If the Content-Type of the request is NOT application/x-www-form-urlencoded, then you would definitely want to include query parameters in the path. If the Content-Type of the request IS application/x-www-form-urlencoded, the query parameters are passed in the body of the request. It is also possible to pass some query parameters via the path, and some in the body of a application/x-www-form-urlencoded request, but you shouldn't include the same parameter in both places. You would never need to include the fragment part. The fragment is nothing more than an instruction for a browser to automatically navigate to a particular location in the HTML page (assuming the request returns HTML, otherwise a fragment makes no sense).

More Information and Examples
top
SendCharset
BOOL CkHttpRequestW_getSendCharset(HCkHttpRequestW cHandle);
void CkHttpRequestW_putSendCharset(HCkHttpRequestW cHandle, BOOL newVal);

Controls whether the charset is explicitly included in the content-type header field of the HTTP POST request. The default value of this property is FALSE.

top
VerboseLogging
BOOL CkHttpRequestW_getVerboseLogging(HCkHttpRequestW cHandle);
void CkHttpRequestW_putVerboseLogging(HCkHttpRequestW cHandle, BOOL newVal);

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.

top
Version
void CkHttpRequestW_getVersion(HCkHttpRequestW cHandle, HCkString retval);
const wchar_t *CkHttpRequestW_version(HCkHttpRequestW cHandle);

Version of the component/library, such as "9.5.0.94"

More Information and Examples
top

Methods

AddBdForUpload
BOOL CkHttpRequestW_AddBdForUpload(HCkHttpRequestW cHandle, const wchar_t *name, const wchar_t *remoteFilename, HCkBinDataW byteData, const wchar_t *contentType);
Introduced in version 9.5.0.76

Adds a file to an upload request where the contents of the file come from byteData.

name is an arbitrary name. (In HTML, it is the form field name of the input tag.)
remoteFilename is the name of the file to be created on the HTTP server.
byteData contains the bytes to be uploaded.
contentType contains is the value of the Content-Type header. An empty string may be passed to allow Chilkat to automatically determine the Content-Type based on the filename extension.

Returns TRUE for success, FALSE for failure.

More Information and Examples
top
AddBytesForUpload
BOOL CkHttpRequestW_AddBytesForUpload(HCkHttpRequestW cHandle, const wchar_t *name, const wchar_t *remoteFileName, HCkByteData byteData);

Adds a file to an upload request where the contents of the file come from an in-memory byte array. To create a file upload request, set the ContentType property = "multipart/form-data" and then call AddBytesForUpload, AddStringForUpload, or AddFileForUpload for each file to be uploaded.

name is an arbitrary name. (In HTML, it is the form field name of the input tag.)
remoteFileName is the name of the file to be created on the HTTP server.
byteData contains the contents (bytes) to be uploaded.

Returns TRUE for success, FALSE for failure.

top
AddBytesForUpload2
BOOL CkHttpRequestW_AddBytesForUpload2(HCkHttpRequestW cHandle, const wchar_t *name, const wchar_t *remoteFileName, HCkByteData byteData, const wchar_t *contentType);

Same as AddBytesForUpload, but allows the Content-Type header field to be directly specified. (Otherwise, the Content-Type header is automatically determined based on the remoteFileName's file extension.)

Returns TRUE for success, FALSE for failure.

top
AddFileForUpload
BOOL CkHttpRequestW_AddFileForUpload(HCkHttpRequestW cHandle, const wchar_t *name, const wchar_t *filePath);

Adds a file to an upload request. To create a file upload request, set the ContentType property = "multipart/form-data" and then call AddFileForUpload, AddBytesForUpload, or AddStringForUpload for each file to be uploaded. This method does not read the file into memory. When the upload occurs, the data is streamed directly from the file, thus allowing for very large files to be uploaded without consuming large amounts of memory.

name is an arbitrary name. (In HTML, it is the form field name of the input tag.)
filePath is the path to an existing file in the local filesystem.

Returns TRUE for success, FALSE for failure.

More Information and Examples
top
AddFileForUpload2
BOOL CkHttpRequestW_AddFileForUpload2(HCkHttpRequestW cHandle, const wchar_t *name, const wchar_t *filePath, const wchar_t *contentType);

Same as AddFileForUpload, but allows the Content-Type header field to be directly specified. (Otherwise, the Content-Type header is automatically determined based on the file extension.)

name is an arbitrary name. (In HTML, it is the form field name of the input tag.)
filePath is the path to an existing file in the local filesystem.

Returns TRUE for success, FALSE for failure.

More Information and Examples
top
AddHeader
void CkHttpRequestW_AddHeader(HCkHttpRequestW cHandle, const wchar_t *name, const wchar_t *value);

Adds a request header to the HTTP request. If a header having the same field name is already present, this method replaces it.

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.)

More Information and Examples
top
AddMwsSignature
BOOL CkHttpRequestW_AddMwsSignature(HCkHttpRequestW cHandle, const wchar_t *domain, const wchar_t *mwsSecretKey);
Introduced in version 9.5.0.66

Computes the Amazon MWS signature using the mwsSecretKey and adds the "Signature" parameter to the request. This method should be called for all Amazon Marketplace Web Service (Amazon MWS) HTTP requests. It should be called after all request parameters have been added.

Important: The Chilkat v9.5.0.75 release accidentally breaks Amazon MWS (not AWS) authentication. If you need MWS with 9.5.0.75, send email to support@chilkatsoft.com for a hotfix, or revert back to v9.5.0.73, or update to a version after 9.5.0.75.

The domain should be the domain of the request, such as one of the following:

  • mws.amazonservices.com
  • mws-eu.amazonservices.com
  • mws.amazonservices.in
  • mws.amazonservices.com.cn
  • mws.amazonservices.jp

Note: This method automatically adds or replaces the existing Timestamp parameter to the current system date/time.

Returns TRUE for success, FALSE for failure.

top
AddParam
void CkHttpRequestW_AddParam(HCkHttpRequestW cHandle, const wchar_t *name, const wchar_t *value);

Adds a request query parameter (name/value pair) to the HTTP request. The name and value strings passed to this method should not be URL encoded.

top
AddStringForUpload
BOOL CkHttpRequestW_AddStringForUpload(HCkHttpRequestW cHandle, const wchar_t *name, const wchar_t *filename, const wchar_t *strData, const wchar_t *charset);

Same as AddFileForUpload, but the upload data comes from an in-memory string instead of a file.

Returns TRUE for success, FALSE for failure.

top
AddStringForUpload2
BOOL CkHttpRequestW_AddStringForUpload2(HCkHttpRequestW cHandle, const wchar_t *name, const wchar_t *filename, const wchar_t *strData, const wchar_t *charset, const wchar_t *contentType);

Same as AddStringForUpload, but allows the Content-Type header field to be directly specified. (Otherwise, the Content-Type header is automatically determined based on the filename's file extension.)

Returns TRUE for success, FALSE for failure.

top
AddSubHeader
BOOL CkHttpRequestW_AddSubHeader(HCkHttpRequestW cHandle, int index, const wchar_t *name, const wchar_t *value);
Introduced in version 9.5.0.55

Adds a request header to the Nth sub-header of the HTTP request. If a header having the same field name is already present, this method replaces it.

Returns TRUE for success, FALSE for failure.

top
GenerateRequestFile
BOOL CkHttpRequestW_GenerateRequestFile(HCkHttpRequestW cHandle, const wchar_t *path);
Introduced in version 9.5.0.64

The same as GenerateRequestText, except the generated request is written to the file specified by path.

Returns TRUE for success, FALSE for failure.

More Information and Examples
top
GenerateRequestText
BOOL CkHttpRequestW_GenerateRequestText(HCkHttpRequestW cHandle, const wchar_t *outStr);
const wchar_t *CkHttpRequestW_generateRequestText(HCkHttpRequestW cHandle);

Returns the request text that would be sent if Http.SynchronousRequest was called.

Returns TRUE for success, FALSE for failure.

top
GetHeaderField
BOOL CkHttpRequestW_GetHeaderField(HCkHttpRequestW cHandle, const wchar_t *name, const wchar_t *outStr);
const wchar_t *CkHttpRequestW_getHeaderField(HCkHttpRequestW cHandle, const wchar_t *name);

Returns the value of a request header field.

Returns TRUE for success, FALSE for failure.

top
GetHeaderName
BOOL CkHttpRequestW_GetHeaderName(HCkHttpRequestW cHandle, int index, const wchar_t *outStr);
const wchar_t *CkHttpRequestW_getHeaderName(HCkHttpRequestW cHandle, int index);

Returns the Nth request header field name. Indexing begins at 0, and the number of request header fields is specified by the NumHeaderFields property.

Returns TRUE for success, FALSE for failure.

top
GetHeaderValue
BOOL CkHttpRequestW_GetHeaderValue(HCkHttpRequestW cHandle, int index, const wchar_t *outStr);
const wchar_t *CkHttpRequestW_getHeaderValue(HCkHttpRequestW cHandle, int index);

Returns the Nth request header field value. Indexing begins at 0, and the number of request header fields is specified by the NumHeaderFields property.

Returns TRUE for success, FALSE for failure.

top
GetParam
BOOL CkHttpRequestW_GetParam(HCkHttpRequestW cHandle, const wchar_t *name, const wchar_t *outStr);
const wchar_t *CkHttpRequestW_getParam(HCkHttpRequestW cHandle, const wchar_t *name);

Returns a request query parameter value by name.

Returns TRUE for success, FALSE for failure.

top
GetParamName
BOOL CkHttpRequestW_GetParamName(HCkHttpRequestW cHandle, int index, const wchar_t *outStr);
const wchar_t *CkHttpRequestW_getParamName(HCkHttpRequestW cHandle, int index);

Returns the Nth request query parameter field name. Indexing begins at 0, and the number of request query parameter fields is specified by the NumParams property.

Returns TRUE for success, FALSE for failure.

More Information and Examples
top
GetParamValue
BOOL CkHttpRequestW_GetParamValue(HCkHttpRequestW cHandle, int index, const wchar_t *outStr);
const wchar_t *CkHttpRequestW_getParamValue(HCkHttpRequestW cHandle, int index);

Returns the Nth request query parameter field value. Indexing begins at 0, and the number of request query parameter fields is specified by the NumParams property.

Returns TRUE for success, FALSE for failure.

More Information and Examples
top
GetUrlEncodedParams
BOOL CkHttpRequestW_GetUrlEncodedParams(HCkHttpRequestW cHandle, const wchar_t *outStr);
const wchar_t *CkHttpRequestW_getUrlEncodedParams(HCkHttpRequestW cHandle);

Returns the request parameters in URL encoded form (i.e. in the exact form that would be sent if the ContentType property was application/x-www-form-urlencoded). For example, if a request has two params: param1="abc 123" and param2="abc-123", then GetUrlEncodedParams would return "abc+123&param2=abc%2D123"

Returns TRUE for success, FALSE for failure.

top
LoadBodyFromBd
BOOL CkHttpRequestW_LoadBodyFromBd(HCkHttpRequestW cHandle, HCkBinDataW requestBody);
Introduced in version 9.5.0.67

Uses the contents of the requestBody as the HTTP request body.

Returns TRUE for success, FALSE for failure.

top
LoadBodyFromBytes
BOOL CkHttpRequestW_LoadBodyFromBytes(HCkHttpRequestW cHandle, HCkByteData byteData);

The HTTP protocol is such that all HTTP requests are MIME. For non-multipart requests, this method may be called to set the MIME body of the HTTP request to the exact contents of the byteData.
Note: A non-multipart HTTP request consists of (1) the HTTP start line, (2) MIME header fields, and (3) the MIME body. This method sets the MIME body.

Returns TRUE for success, FALSE for failure.

top
LoadBodyFromFile
BOOL CkHttpRequestW_LoadBodyFromFile(HCkHttpRequestW cHandle, const wchar_t *filePath);

The HTTP protocol is such that all HTTP requests are MIME. For non-multipart requests, this method may be called to set the MIME body of the HTTP request to the exact contents of filePath.
Note: A non-multipart HTTP request consists of (1) the HTTP start line, (2) MIME header fields, and (3) the MIME body. This method sets the MIME body.

Returns TRUE for success, FALSE for failure.

top
LoadBodyFromSb
BOOL CkHttpRequestW_LoadBodyFromSb(HCkHttpRequestW cHandle, HCkStringBuilderW requestBody, const wchar_t *charset);
Introduced in version 9.5.0.67

Uses the contents of the requestBody as the HTTP request body. The charset indicates the binary representation of the string, such as "utf-8", "utf-16", "iso-8859-*", "windows-125*", etc. Any of the character encodings supported at the link below are valid.

Returns TRUE for success, FALSE for failure.

More Information and Examples
top
LoadBodyFromString
BOOL CkHttpRequestW_LoadBodyFromString(HCkHttpRequestW cHandle, const wchar_t *bodyStr, const wchar_t *charset);

The HTTP protocol is such that all HTTP requests are MIME. For non-multipart requests, this method may be called to set the MIME body of the HTTP request to the exact contents of bodyStr.
Note: A non-multipart HTTP request consists of (1) the HTTP start line, (2) MIME header fields, and (3) the MIME body. This method sets the MIME body.

charset indicates the charset, such as "utf-8" or "iso-8859-1", to be used. The HTTP body will contain the bodyStr converted to this character encoding.

Returns TRUE for success, FALSE for failure.

More Information and Examples
top
RemoveAllParams
void CkHttpRequestW_RemoveAllParams(HCkHttpRequestW cHandle);

Removes all request parameters.

More Information and Examples
top
RemoveHeader
BOOL CkHttpRequestW_RemoveHeader(HCkHttpRequestW cHandle, const wchar_t *name);

Removes all occurrences of a HTTP request header field. Always returns TRUE.

Returns TRUE for success, FALSE for failure.

top
RemoveParam
void CkHttpRequestW_RemoveParam(HCkHttpRequestW cHandle, const wchar_t *name);

Removes a single HTTP request parameter by name.

More Information and Examples
top
SetFromUrl
void CkHttpRequestW_SetFromUrl(HCkHttpRequestW cHandle, const wchar_t *url);

Parses a URL and sets the Path and query parameters (NumParams, GetParam, GetParamName, GetParamValue).

More Information and Examples
top
StreamBodyFromFile
BOOL CkHttpRequestW_StreamBodyFromFile(HCkHttpRequestW cHandle, const wchar_t *filePath);

Useful for sending HTTP requests where the body is a very large file. For example, to send an XML HttpRequest containing a very large XML document, one would set the HttpVerb = "POST", the ContentType = "text/xml", and then call StreamBodyFromFile to indicate that the XML body of the request is to be streamed directly from a file. When the HTTP request is actually sent, the body is streamed directly from the file, and thus the file never needs to be loaded in its entirety in memory.

Returns TRUE for success, FALSE for failure.

More Information and Examples
top
StreamChunkFromFile
BOOL CkHttpRequestW_StreamChunkFromFile(HCkHttpRequestW cHandle, const wchar_t *path, const wchar_t *offset, const wchar_t *numBytes);
Introduced in version 9.5.0.55

This method is the same as StreamBodyFromFile, but allows for an offset and number of bytes to be specified. The offset and numBytes are integers passed as strings.

Returns TRUE for success, FALSE for failure.

top