AuthGoogle Delphi DLL Reference Documentation

AuthGoogle

Current Version: 9.5.0.97

Provides functionality for authenticating calls to the Google Cloud Platform API and Google Apps API using a service account.

Create/Dispose

var
myObject: HCkAuthGoogle;

begin
myObject := CkAuthGoogle_Create();

// ...

CkAuthGoogle_Dispose(myObject);
end;
function CkAuthGoogle_Create: HCkAuthGoogle; stdcall;

Creates an instance of the HCkAuthGoogle object and returns a handle (i.e. a Pointer). The handle is passed in the 1st argument for the functions listed on this page.

procedure CkAuthGoogle_Dispose(handle: HCkAuthGoogle); stdcall;

Objects created by calling CkAuthGoogle_Create must be freed by calling this method. A memory leak occurs if a handle is not disposed by calling this function.

Properties

AccessToken
procedure CkAuthGoogle_getAccessToken(objHandle: HCkAuthGoogle; outPropVal: HCkString); stdcall;
procedure CkAuthGoogle_putAccessToken(objHandle: HCkAuthGoogle; newPropVal: PWideChar); stdcall;
function CkAuthGoogle__accessToken(objHandle: HCkAuthGoogle): PWideChar; stdcall;
Introduced in version 9.5.0.58

The access token to be used in Google API requests. This property is set on a successful call to ObtainAccessToken.

<b>Important:</b> This class is used for authenticating calls to the Google Cloud Platform API and Google Apps API using a <b>service account.</b>. 
For 3-legged OAuth2, where a browser must be used to interactively get permission from the Google account owner, use the Chilkat OAuth2 class/object.

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DebugLogFilePath
procedure CkAuthGoogle_getDebugLogFilePath(objHandle: HCkAuthGoogle; outPropVal: HCkString); stdcall;
procedure CkAuthGoogle_putDebugLogFilePath(objHandle: HCkAuthGoogle; newPropVal: PWideChar); stdcall;
function CkAuthGoogle__debugLogFilePath(objHandle: HCkAuthGoogle): PWideChar; stdcall;

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.

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EmailAddress
procedure CkAuthGoogle_getEmailAddress(objHandle: HCkAuthGoogle; outPropVal: HCkString); stdcall;
procedure CkAuthGoogle_putEmailAddress(objHandle: HCkAuthGoogle; newPropVal: PWideChar); stdcall;
function CkAuthGoogle__emailAddress(objHandle: HCkAuthGoogle): PWideChar; stdcall;
Introduced in version 9.5.0.58

The client email address of the service account. If a JSON key is used, then the client_email should already be specified within the JSON key, and this property is unused. This property must be set if using a P12 key.

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ExpireNumSeconds
function CkAuthGoogle_getExpireNumSeconds(objHandle: HCkAuthGoogle): Integer; stdcall;
procedure CkAuthGoogle_putExpireNumSeconds(objHandle: HCkAuthGoogle; newPropVal: Integer); stdcall;
Introduced in version 9.5.0.58

The expiration time, in seconds, of the access token to be requested. The maximum value is 1 hour (3600 seconds). The default value is 3600.

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Iat
function CkAuthGoogle_getIat(objHandle: HCkAuthGoogle): Integer; stdcall;
procedure CkAuthGoogle_putIat(objHandle: HCkAuthGoogle; newPropVal: Integer); stdcall;
Introduced in version 9.5.0.77

This property can be set to override the default current date/time value for the "iat" claim of the JWT. It can be set to a value indicating the number of seconds from 1970-01-01T00:00:00Z UTC.

The default value is 0, which indicates to use the iat value for the current system date/time. Unless explicitly needed, always leave this property at the default value.

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JsonKey
procedure CkAuthGoogle_getJsonKey(objHandle: HCkAuthGoogle; outPropVal: HCkString); stdcall;
procedure CkAuthGoogle_putJsonKey(objHandle: HCkAuthGoogle; newPropVal: PWideChar); stdcall;
function CkAuthGoogle__jsonKey(objHandle: HCkAuthGoogle): PWideChar; stdcall;
Introduced in version 9.5.0.58

The JSON key for obtaining an access token. An application must set either the P12 or JSON private key, but not both.

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LastErrorHtml
procedure CkAuthGoogle_getLastErrorHtml(objHandle: HCkAuthGoogle; outPropVal: HCkString); stdcall;
function CkAuthGoogle__lastErrorHtml(objHandle: HCkAuthGoogle): PWideChar; stdcall;

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.

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LastErrorText
procedure CkAuthGoogle_getLastErrorText(objHandle: HCkAuthGoogle; outPropVal: HCkString); stdcall;
function CkAuthGoogle__lastErrorText(objHandle: HCkAuthGoogle): PWideChar; stdcall;

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.

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LastErrorXml
procedure CkAuthGoogle_getLastErrorXml(objHandle: HCkAuthGoogle; outPropVal: HCkString); stdcall;
function CkAuthGoogle__lastErrorXml(objHandle: HCkAuthGoogle): PWideChar; stdcall;

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.

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LastMethodSuccess
function CkAuthGoogle_getLastMethodSuccess(objHandle: HCkAuthGoogle): wordbool; stdcall;
procedure CkAuthGoogle_putLastMethodSuccess(objHandle: HCkAuthGoogle; newPropVal: wordbool); stdcall;

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.

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NumSecondsRemaining
function CkAuthGoogle_getNumSecondsRemaining(objHandle: HCkAuthGoogle): Integer; stdcall;
Introduced in version 9.5.0.58

If the access token is valid, contains the number of seconds remaining until it expires. A value of 0 indicates an invalid or expired access token.

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Scope
procedure CkAuthGoogle_getScope(objHandle: HCkAuthGoogle; outPropVal: HCkString); stdcall;
procedure CkAuthGoogle_putScope(objHandle: HCkAuthGoogle; newPropVal: PWideChar); stdcall;
function CkAuthGoogle__scope(objHandle: HCkAuthGoogle): PWideChar; stdcall;
Introduced in version 9.5.0.58

A space-delimited list of the permissions that the application requests.

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SubEmailAddress
procedure CkAuthGoogle_getSubEmailAddress(objHandle: HCkAuthGoogle; outPropVal: HCkString); stdcall;
procedure CkAuthGoogle_putSubEmailAddress(objHandle: HCkAuthGoogle; newPropVal: PWideChar); stdcall;
function CkAuthGoogle__subEmailAddress(objHandle: HCkAuthGoogle): PWideChar; stdcall;
Introduced in version 9.5.0.58

The email address of the user for which the application is requesting delegated access.

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Valid
function CkAuthGoogle_getValid(objHandle: HCkAuthGoogle): wordbool; stdcall;
Introduced in version 9.5.0.58

True if the AccessToken property contains a valid non-expired access token obtained via the call to ObtainAccessToken.

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VerboseLogging
function CkAuthGoogle_getVerboseLogging(objHandle: HCkAuthGoogle): wordbool; stdcall;
procedure CkAuthGoogle_putVerboseLogging(objHandle: HCkAuthGoogle; newPropVal: wordbool); stdcall;

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.

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Version
procedure CkAuthGoogle_getVersion(objHandle: HCkAuthGoogle; outPropVal: HCkString); stdcall;
function CkAuthGoogle__version(objHandle: HCkAuthGoogle): PWideChar; stdcall;

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

More Information and Examples
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Methods

GetP12
function CkAuthGoogle_GetP12(objHandle: HCkAuthGoogle): HCkPfx; stdcall;
Introduced in version 9.5.0.58

Returns the private key in a PFX (P12) object. This is only possible if the private key was previously set by calling SetP12.

Returns nil on failure

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LoadTaskCaller
function CkAuthGoogle_LoadTaskCaller(objHandle: HCkAuthGoogle;
    task: HCkTask): wordbool; stdcall;
Introduced in version 9.5.0.80

Loads the caller of the task's async method.

Returns True for success, False for failure.

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ObtainAccessToken
function CkAuthGoogle_ObtainAccessToken(objHandle: HCkAuthGoogle;
    connection: HCkSocket): wordbool; stdcall;
Introduced in version 9.5.0.58

Sends the HTTP request to fetch the access token. When this method completes successfully, the access token is available in the AccessToken property. The connection is an existing connection to www.googleapis.com.

Important: Make sure your computer's date/time is accurately set to the current date/time, otherwise you'll get a 400 response status code with this error: "Invalid JWT: Token must be a short-lived token (60 minutes) and in a reasonable timeframe. Check your iat and exp values and use a clock with skew to account for clock differences between systems.".

Returns True for success, False for failure.

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ObtainAccessTokenAsync (1)
function CkAuthGoogle_ObtainAccessTokenAsync(objHandle: HCkAuthGoogle;
    connection: HCkSocket): HCkTask; stdcall;
Introduced in version 9.5.0.58

Creates an asynchronous task to call the ObtainAccessToken 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 nil on failure

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SetP12
function CkAuthGoogle_SetP12(objHandle: HCkAuthGoogle;
    key: HCkPfx): wordbool; stdcall;
Introduced in version 9.5.0.58

Sets the P12 private key to be used for obtaining an access token. An application must set either the P12 or JSON private key, but not both.

Returns True for success, False for failure.

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Events

Chilkat supports event callbacks for the Delphi DLL starting in version 9.5.0.82.

AbortCheck
function MyAbortCheck(): Integer; cdecl;
Introduced in version 9.5.0.82

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. Return True to abort; return False to continue (not abort)

More Information and Examples
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PercentDone
function MyPercentDone(pctDone: Integer): Integer; cdecl;
Introduced in version 9.5.0.82

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.

Return True to abort; return False to continue (not abort)

More Information and Examples
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ProgressInfo
procedure MyProgressInfo(name: PWideChar; value: PWideChar) cdecl;
Introduced in version 9.5.0.82

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.

More Information and Examples
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TaskCompleted
procedure MyTaskCompleted(task: HCkTask) cdecl;
Introduced in version 9.5.0.82

Called in the background thread when an asynchronous task completes.

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