Prerequisites for OAuth 2.0 authentication

1. Click "Create a project". Give the name of your project. An identifier is automatically proposed for your project.
2. Validate
3. The project is created.
4. In the menu on the left, click "API and authentication" then "API".
5. Choose the services required by the application:
   • To access the calendars, choose "Calendar API" ("Google Apps APIs" category).
   • To access the contacts, choose "Contacts API" ("Google Apps APIs" category).
   • To access the Google documents, choose "Drive API" ("Google Apps APIs" category).
   • To access the Picasa albums and the documents, there is no need to select a specific API.
6. In the menu on the left, click "Identifiers".
7. Then, click the "Create a client identifier" button.
   • Select the type of application: "Application installed".
   • The authorization screen must be configured during the first creation of client identifier.
   • In the authorisation screen, in the "Product name" area, enter the name of your application for example.
   • Click "Save".
   • The screen for creating the client identifier is re-displayed.
     • For the WEBDEV websites, select "Web application". In the "Authorized redirection URI" area, enter the address of the Web server where your site is installed followed by "/WD300AWP/WD300Awp.exe/GGLCONNECT_RETURN". The syntax has the following type:
       
       http[s]://<Server_name_or_IP_address>[:<Port>]/WD300AWP/WD300AWP.exe/GGLCONNECT_RETURN
       
       For example:
       • In test mode, with a Web server configured on the default port (80):
         
         http://localhost/WD300AWP/WD300AWP.exe/GGLCONNECT_RETURN
       • In test mode, with a Web server configured on port 8080:
         
         http://localhost:8080/WD300AWP/WD300AWP.exe/GGLCONNECT_RETURN
       • In Internet deployment, with a Web server configured on the default port with "www.mydomain.com" as domain:
         
         http://www.mydomain.com//WD300AWP/WD300AWP.exe/GGLCONNECT_RETURN
       • In Internet deployment, with a Web server configured in https on the default port (443) with "www.mydomain.com" as domain:
         
         https://www.mydomain.com//WD300AWP/WD300AWP.exe/GGLCONNECT_RETURN
       • In Intranet deployment, with a Web server configured on port 81 with "IntranetServer" as computer name:
         
         http://IntranetServer:81/WD300AWP/WD300AWP.exe/GGLCONNECT_RETURN
   • Validate. The client identifiers are created:
     • Client identifier. This identifier must be stored. It will be used in the gglConnection variable.
     • Client secret code. This identifier must be stored. It will be used in the gglConnection variable.

Connection persistence

let sAuthPersistenceFile = SysDir(srLocalAppData) + [fSep] + "gglauth.xml"

cnt is gglConnection
// If connection already established
IF fFileExist(sAuthPersistenceFile) THEN 
	// Restore the connection 
	let bufDeserialize = fLoadBuffer(sAuthPersistenceFile) 
	Deserialize(cnt, bufDeserialize, psdXML) 
ELSE 
	// New connection 
	cnt.Email = "email@gmail.com" 
	cnt.ClientID = "387756281032-qffa6dajjd5348iqhi558xxxxxxxx.apps.googleusercontent.com" 
	cnt.ClientSecret = "Sxxxxx-jLMwwh" 
END 

IF GglConnect(cnt, gglCalendarService) THEN 
	// Save the connection in order to re-use it later 
	bufSerialize is Buffer 
	Serialize(cnt, bufSerialize, psdXML) 
	fSaveBuffer(sAuthPersistenceFile, bufSerialize) 
END

Functions (prefix syntax) that handle gglConnection variables