AuthGoogle C++ Reference Documentation
CkAuthGoogle
Current Version: 10.1.2
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 CkAuthGoogle obj; // Dynamically allocate/delete CkAuthGoogle *pObj = new CkAuthGoogle(); // ... delete pObj;
Properties
AccessToken
const char *accessToken(void);
void put_AccessToken(const char *ansiOrUtf8Str);
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 char *debugLogFilePath(void);
void put_DebugLogFilePath(const char *ansiOrUtf8Str);
If set to a file path, this property logs the LastErrorText of each Chilkat method or property call to the specified file. This logging helps identify the context and history of Chilkat calls leading up to any crash or hang, aiding in debugging.
Enabling the VerboseLogging property provides more detailed information. This property is mainly used for debugging rare instances where a Chilkat method call causes a hang or crash, which should generally not happen.
Possible causes of hangs include:
- A timeout property set to 0, indicating an infinite timeout.
- A hang occurring within an event callback in the application code.
- An internal bug in the Chilkat code causing the hang.
EmailAddress
const char *emailAddress(void);
void put_EmailAddress(const char *ansiOrUtf8Str);
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 char *jsonKey(void);
void put_JsonKey(const char *ansiOrUtf8Str);
The JSON key for obtaining an access token. An application must set either the P12 or JSON private key, but not both.
LastErrorHtml
Provides HTML-formatted information about the last called method or property. If a method call fails or behaves unexpectedly, check this property for details. Note that information is available regardless of the method call's success.
topLastErrorText
Provides plain text information about the last called method or property. If a method call fails or behaves unexpectedly, check this property for details. Note that information is available regardless of the method call's success.
LastErrorXml
Provides XML-formatted information about the last called method or property. If a method call fails or behaves unexpectedly, check this property for details. Note that information is available regardless of the method call's success.
topLastMethodSuccess
void put_LastMethodSuccess(bool newVal);
Indicates the success or failure of the most recent method call: true means success, false means failure. This property remains unchanged by property setters or getters. This method is present to address challenges in checking for null or Nothing returns in certain programming languages.
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 char *subEmailAddress(void);
void put_SubEmailAddress(const char *ansiOrUtf8Str);
The email address of the user for which the application is requesting delegated access.
topUtf8
void put_Utf8(bool newVal);
When set to true, all "const char *" arguments are interpreted as utf-8 strings. If set to false (the default), then "const char *" arguments are interpreted as ANSI strings. Also, when set to true, and Chilkat method returning a "const char *" is returning the utf-8 representation. If set to false, all "const char *" return values are ANSI strings.
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.
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 CkBaseProgress. Your application can implement methods to override some or all of the default/empty method implementations of the CkBaseProgress base class.
For example:
CkAuthGoogle authgoogle; MyAuthGoogleProgress callbackObj; authgoogle.put_EventCallbackObject(&callbackObj);
MyAuthGoogleProgress example:
#include "CkBaseProgress.h"
class MyAuthGoogleProgress : public CkBaseProgress {
public:
MyAuthGoogleProgress();
virtual ~MyAuthGoogleProgress();
void AbortCheck(bool *abort);
void PercentDone(int pctDone, bool *abort);
void ProgressInfo(const char *name, const char *value);
void TaskCompleted(CkTask &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.