Facebook - Exchange code for access_token (C# / Windows Phone / NO SDK) -


i authenticating facebook via oauth 2.0 using c# on windows phone. using rest service calls. not using facebook sdk @ all. able launch browser on phone, have user sign in , approve scope of app, , retrieve authorization code.

however, cannot life of me exchange authorization code access token.

my facebook app has following switches turned on under 'settings' --> 'advanced':

  • native or desktop app? [yes]
  • is app secret embedded? [no]
  • client oauth login? [yes]
  • embedded browser oauth login? [yes]

i should note model authenticates user , retrieves authorization code on phone, , pass authorization code secure service exchange access_token. having issues though, have temporarily moved server call phone app troubleshooting, same error.

the error receive is:

{"error":{"message":"invalid verification code format.","type":"oauthexception","code":100}}

i have tried several combinations of things including wrapping authorization code httputility.urlencode()

here sample of code (actual values swapped out). 

        string facebookclientid = "123456789123456789";         string facebookredirecturi = "https://www.facebook.com/connect/login_success.html";         string facebookclientsecret = "d156df15dfds1f561fds5f1ds6f1";         string facebookurl = "https://graph.facebook.com/oauth/access_token";          httprequestmessage tokenrequest = new httprequestmessage(httpmethod.get, new uri(facebookurl + "?client_id=" + facebookclientid + "&redirect_uri=" + httputility.urlencode(facebookredirecturi) + "&client_secret=" + facebookclientsecret + "&code=" + httputility.urlencode(facebookauthorizationcode)));          httpresponsemessage tokenresponse = await hc.sendasync(tokenrequest);          var json = tokenresponse.content.readasstringasync().result;

json ends containing error string reported above stating authorization code bad.

any ideas?

kind regards,

goodbar

dah... nevermind, setting authorization code .tolower() prior exchanging access_token. removed , works charm...

for record though, able access_token of switches in facebook settings --> advanced turned off


Comments

Post a Comment

Popular posts from this blog

apache - Remove .php and add trailing slash in url using htaccess not loading css -

i have add following code htaccess file removing .php extension , add trailing slash urls. worked fine reduced page loading speed , css code not loading @ all. pages ugly. please help rewriteengine on rewritebase / ## hide .php extension snippet # externally redirect /dir/foo.php /dir/foo rewritecond %{the_request} ^[a-z]{3,}\s([^.]+)\.php [nc] rewriterule ^ %1/ [r,l] # add trailing slash rewritecond %{request_filename} !-f rewritecond %{request_uri} !/$ rewriterule . %{request_uri}/ [l,r=301] # internally forward /dir/foo /dir/foo.php rewritecond %{request_filename} !-d rewritecond %{request_filename}.php -f rewriterule ^(.*?)/?$ $1.php [l] we can rewrite urls using .htaccess files. before writing in .htaccess files need verify kind of server using. can check server adding a <?php phpinfo(); ?> in php page. ensure mod_rewrite module enabled in apache server. can identified checking phpinfo included page. common methods used url rewriting follows ...
Read more

inno setup - TLabel or TNewStaticText - change .Font.Style on Focus like Cursor changes with .Cursor -

is possible change .font.style on focus tlabel or tnewstatictext happens cursor when use .cursor ? there no built-in support track mouse hovering in inno setup @ time. however, intercepting window procedure of controls can track yourself. following example need innocallback library: [setup] appname=my program appversion=1.5 defaultdirname={pf}\my program outputdir=userdocs:inno setup examples output [files] source: "innocallback.dll"; destdir: "{tmp}"; flags: dontcopy [code] #ifdef unicode #define aw "w" #else #define aw "a" #endif const gwl_wndproc = -4; wm_mousemove = $0200; type wparam = uint_ptr; lparam = longint; lresult = longint; twindowproc = function(hwnd: hwnd; umsg: uint; wparam: wparam; lparam: lparam): lresult; function setcapture(hwnd: hwnd): hwnd; external 'setcapture@user32.dll stdcall'; function releasecapture: bool; external 'releasecapture@user32.dll stdcall'; func...
Read more