android - Facebook webview fails when shared -

final edit bug. after filing report addressed.

edit

i trying user id in webview of facebook messenger bot. works fine on mobile, yet fails on desktop (web). should not case.

messenger 2.1 release statement gives following quote:

desktop support extensions sdk: new feature extend functionality across mobile , web, creating consistent experience across devices. now, features user id , sharing used accessible on mobile available on desktop well. provides developers easier way test , debug when implementing webview , chat extensions.

there 2 ways user id messenger extensions: getuserid() , getcontext(). docs state getuserid() not available on desktop, make no mention of getcontext().

howevew, there bug report states getcontext() call not yet available on desktop.

the docs mention no other ways of getting user id. how 1 supposed that?

as kicker, if read original question, see getcontext() work on desktop (web), if webview opened through link sent directly bot.

original

i working on facebook (messenger) bot using webview. basic of tasks userid.

this hit big problem. having investigated thoroughly, below present cases , results.

• case 1: app sends me generic template web_url button (that opens webview) , share button.

  everything works great. user id.

• case 2: click share message in case 1, , share myself , app.

  from either message thread (i myself, or app) getcontext() call return error 2018166 permission not valid call sdk api. , askpermission() returns 2018154 messenger extensions unexpected error.

• case 3: click share inside webview using beginshareflow() , share myself , bot.

  same case 2

• case 4: here's kicker.

  activating webview case 2 or case 3 android, works , gives me user id.

• case 5: sharing friend has interacted app before.

  when friend activates webview, desktop fails, android works.

• case 6: sharing friend has not interacted bot.

  on desktop doesn't work (sharing button or through beginshareflow()), works!

so, after writing of out, pattern is:

• on android, webview sharing works expected: can user id whether have interacted bot befor or not.
• on desktop, time webview provides user id, when message webview link sent bot. once shared user, webview still opens, not provide context.

just clarify. user id using getcontext, , not getuserid docs doesn't work on desktop.

is there can this? bot's webviews work both on desktop , mobile.

i can think of workaround, it's far ideal

edit 2

as requested, payload sharing within webview is:

{   "attachment":{     "type":"template",     "payload":{       "template_type":"generic",       "elements": [{         "title":"testing webview",         "default_action":{           "type":"web_url",           "webview_height_ratio": "full",           "messenger_extensions": true,           "url":"https://plenty.life/webview"         },         "buttons":[{           "type":"web_url",           "webview_height_ratio": "full",           "messenger_extensions": true,           "url":"https://plenty.life/webview",           "title":"test"         }]       }]     }   } } 

try this...

<script> window.extasyncinit = function() {     // messenger extensions js sdk done loading      console.log("using getuserid in",window.name)      messengerextensions.getuserid(function success(uids) {     // user id obtained.          var psid = uids.psid;         console.log(psid);         document.getelementbyid("userid").innertext="your user id "+psid;     }, function error(err, errormessage) {           // error handling code     console.log("some error",err,errormessage)     });      messengerextensions.getcontext('<appid>',          function success(result){             console.log("success",result)         },         function error(result){             console.log("error",result)         }     ); }; </script> 

wiki