CkAuthGoogleW Unicode C++ Reference Documentation
CkAuthGoogleW
Current Version: 10.0.0
Provides functionality for authenticating calls to the Google Cloud Platform API and Google Apps API using a service account.
Object Creation
// Local variable on the stack CkAuthGoogleW obj; // Dynamically allocate/delete CkAuthGoogleW *pObj = new CkAuthGoogleW(); // ... delete pObj;
Properties
AccessToken
const wchar_t *accessToken(void);
void put_AccessToken(const wchar_t *str);
The access token to be used in Google API requests. This property is set on a successful call to ObtainAccessToken.
Important: This class is used for authenticating calls to the Google Cloud Platform API and Google Apps API using a service account.. 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.
topDebugLogFilePath
const wchar_t *debugLogFilePath(void);
void put_DebugLogFilePath(const wchar_t *str);
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:
- a timeout related property was set to 0 to explicitly indicate that an infinite timeout is desired,
- the hang is actually a hang within an event callback (i.e. it is a hang within the application code), or
- there is an internal problem (bug) in the Chilkat code that causes the hang.
EmailAddress
const wchar_t *emailAddress(void);
void put_EmailAddress(const wchar_t *str);
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.
ExpireNumSeconds
void put_ExpireNumSeconds(int newVal);
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.
topIat
void put_Iat(int newVal);
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.
topJsonKey
const wchar_t *jsonKey(void);
void put_JsonKey(const wchar_t *str);
The JSON key for obtaining an access token. An application must set either the P12 or JSON private key, but not both.
LastErrorHtml
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.
topLastErrorText
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.
LastErrorXml
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.
topLastMethodSuccess
void put_LastMethodSuccess(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.
topNumSecondsRemaining
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.
topScope
A space-delimited list of the permissions that the application requests.
topSubEmailAddress
const wchar_t *subEmailAddress(void);
void put_SubEmailAddress(const wchar_t *str);
The email address of the user for which the application is requesting delegated access.
topValid
true if the AccessToken property contains a valid non-expired access token obtained via the call to ObtainAccessToken.
topVerboseLogging
void put_VerboseLogging(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.
topVersion
Methods
AddClaims
Adds additional custom claims to the JWT claims set.
Returns true for success, false for failure.
GetP12
Returns the private key in a PFX (P12) object. This is only possible if the private key was previously set by calling SetP12.
Note: The application is responsible for deleting (via the C++ delete operator) the object returned by this method.
Returns NULL on failure
topLoadTaskCaller
ObtainAccessToken
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.
ObtainAccessTokenAsync (1)
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.
Note: The application is responsible for deleting (via the C++ delete operator) the object returned by this method.
Returns NULL on failure
topSetP12
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.
Events
To implement an event callback, your application would define and implement a class that inherits from CkBaseProgressW. Your application can implement methods to override some or all of the default/empty method implementations of the CkBaseProgressW base class.
For example:
CkAuthGoogleW authgoogle; MyAuthGoogleProgressW callbackObj; authgoogle.put_EventCallbackObject(&callbackObj);
MyAuthGoogleProgressW example:
#include "CkBaseProgressW.h"
class MyAuthGoogleProgressW : public CkBaseProgressW {
public:
MyAuthGoogleProgressW();
virtual ~MyAuthGoogleProgressW();
void AbortCheck(bool *abort);
void PercentDone(int pctDone, bool *abort);
void ProgressInfo(const wchar_t *name, const wchar_t *value);
void TaskCompleted(CkTaskW &task);
};AbortCheck
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.
PercentDone
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).
ProgressInfo
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.
TaskCompleted
Called in the background thread when an asynchronous task completes.