json - Use the Mozilla Backpack Connecti API with PHP -

i issue badge mozilla backpack connect api (check !). so, have followed this document still cannot issue badge !

i have exact same problem when try new access token using refresh token. i've posted "get new access token" code here because it's bit easier understand issuing one.

i in php curl, not in javascript.

here code :

$data = array(     'grant_type' => 'refresh_token',     'refresh_token' => $refreshtoken ); $url = $apiroot .'/token';  $ch = curl_init(); curl_setopt($ch, curlopt_url, $url); curl_setopt($ch, curlopt_post, count($data)); curl_setopt($ch, curlopt_postfields, http_build_query($data)); curl_setopt($ch, curlopt_httpheader, array(     'content-type: application/json' )); curl_setopt($ch, curlopt_verbose, true); curl_setopt($ch, curlopt_stderr, fopen('php://output', 'w+')); curl_setopt($ch, curlopt_returntransfer, true);  $response = curl_exec($ch); var_dump($response);  curl_close($ch); 

here trying new access token, mentioned in the same document, unfortunately, response :

bad request: bad request
@ next (/var/www/openbadges/node_modules/express/node_modules/connect/lib/proto.js:125:13)
@ /var/www/openbadges/node_modules/express/node_modules/connect/lib/middleware/bodyparser.js:54:23
@ incomingmessage. (/var/www/openbadges/node_modules/express/node_modules/connect/lib/middleware/json.js:74:60)
@ incomingmessage.emit (events.js:92:17)
@ _stream_readable.js:938:16
@ process._tickcallback (node.js:419:13)

if deeper, have verbosed request , gives me :

> post /api/token http/1.1
host: backpack.openbadges.org
accept: /
content-type: application/json
content-length: 81

* upload sent off: 81 out of 81 bytes
* additional stuff not fine transfer.c:1037: 0 0
* http 1.1 or later persistent connection, pipelining supported
< http/1.1 400 bad request
< cache-control: no-cache="set-cookie"
< content-type: text/plain
< date: fri, 29 may 2015 12:36:03 gmt
< set-cookie: awselb=674101290634b07d75a3c1417fa6788d6e65270ec8d2d0e6014fb81fa4e878caea117d6e6334db190f94a3d84909e9928f08d6b81651bdc3386afc0a84f3a39f4b51e09b31;path=/;max-age=3600
< x-frame-options: deny
< x-powered-by: express
< content-length: 478
< connection: keep-alive
<
* connection #0 host backpack.openbadges.org left intact
* closing connection #0

so, basically, responses me error 400 "bad request" no more information...

for information, if try javascript, works. if :

$.ajax({     type: 'post',     url: 'https://backpack.openbadges.org/api/token',     data: {         grant_type: 'refresh_token',         refresh_token: therefreshtoken     },     headers: {         'content-type': 'application/json'     },     success: function(data, textstatus, req) {         console.log(textstatus);         console.log(data);     },     error: function(xhr, textstatus, err) {         console.log(textstatus);         console.log(err);         console.log(xhr);         console.log($(this));     } }); 

this returns me success, when use php curl doesn't work ! why ?

and badge valid (it passes the validation without problem).

i've searched hours ! solution simple not obvious...

on line : curl_setopt($ch, curlopt_postfields, http_build_query($data)); have use json_encode() instead of http_build_query() !

so doing : curl_setopt($ch, curlopt_postfields, json_encode($data)); , works ! yay !