Changes needed for latest documentation

[rwu2359]

Change Post to:
/oauth2/v4/token HTTP/1.1

Change Token URL to:
https://www.googleapis.com/oauth2/v4/token

Change HOST URL to:
www.googleapis.com

Change Redirect URI to:
urn:ietf:wg:oauth:2.0:oob:auto

Change SetVariable is #137 of …GetNewAuthCode to;

~ResultStart	=	Position ( ~ResultSource; "code="; 1; 1 ) -1 ;

				// We drop the code which precedes the code
~ObjectLength	=	~ResultLength - ~ResultStart ;
~Object 		=	Right ( ~ResultSource; ~ObjectLength );

				// We drop the code which precedes the 'Named Pair': ‘code’ 
~ValueStart	=	Position (~Object; "code=" ; 1; 1 ) + 5;

				// We determinw the position of the character before the start of the value of ‘&’
~ValueEnd	=	Position (~Object; "&" ;  1; 1) ;

Change SetVariable in #207 to:
Let([
_QuoteChar = Char(34) ;
~Response = OAuth2FMProfiles::g_Temp_ReturnedText;
~OpenQuote = " " & _QuoteChar ;
~CloseQuote = _QuoteChar & "="
];

Substitute ( ~Response ;
[ "{" ; "" ] ;
[ "}" ; "" ] ;
[ ": " ; "=" ]; //changed
[ ~OpenQuote ; "$" ] ;
[ ~CloseQuote ; "=" ] ;
[ " " ; "" ] ;
[ "," ; " ;" ]
)

)

Change SetVariable is #110 of …RefreshToken to;
Let([
_QuoteChar = Char(34) ;
~Response = OAuth2FMProfiles::g_Temp_ReturnedText;
~OpenQuote = " " & _QuoteChar ;
~CloseQuote = _QuoteChar & "="
];

Substitute ( ~Response ;
[ "{" ; "" ] ;
[ "}" ; "" ] ;
[ ": " ; "=" ]; //changed
[ ~OpenQuote ; "$" ] ;
[ ~CloseQuote ; "=" ] ;
[ " " ; "" ] ;
[ "," ; " ;" ]
)

)

[diadian]

Thank you for posting the update to Jim's code, RWU2359. They were very helpful and much appreciated.

I worked through the changes this weekend and it worked perfectly from a Filemaker Pro 17 desktop client for all aspects (logging in to Google, getting an auth token, getting an access token and refresh token and using a refresh token to replace an expired access token.

However on FileMaker Go, you cannot login because the login screen never gets drawn in the web viewer. If your database already has a valid refresh key, the database will be able to get a new access token. I don't understand why this is happening yet but since this is my main use case I will keep working on making this code work on iOS.

A few bits of info for the next person:

1. The three changes that RWU2359 posted all deal with changes in the formatting of the results of OAuth requests, which were announced & implemented by Google some time ago.
2. The second set of changes has to be applied to the calculation on line 203, not 207.
3. The OAuth 2.0 client ID you create for use with this code has to be of type "other". Otherwise the google login screen will not return a Auth Token after a successful login.