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    copied!<p>With much help from Tal at Cloudinary, I have reached success! I'll recap the solution:</p> <ol> <li><p>Do not instantiate Cloudinary's library in $(document).ready(), instead just plug it in directly within script section</p> <pre><code> &lt;script type="text/javascript"&gt; $.cloudinary.config({"api_key":"&lt;key&gt;","cloud_name":"&lt;cloud_name&gt;"}); </code></pre></li> <li><p>Instantiate the formData with the FileUpload widget, this ensures fileUpload<br> loads your json send params (it's a timing issue).</p> <pre><code> $('.cloudinary-fileupload').fileupload({ formData : &lt;unescaped json params&gt;, dropZone: $('.sceneUpBtn'), dataType: 'json', done: function (e, data) { $.each(data.result.files, function (index, file) { $('&lt;p/&gt;').text(file.name).appendTo('#filename'); }); }, progressall: function (e, data) { var progress = parseInt(data.loaded / data.total * 100, 10); $('.sceneUpBar').css('width',progress + '%'); } }); </code></pre></li> <li><p>Match signature params to json params sent to server. In Apex sign and return json as such:</p> <pre><code>public String getCloudinarySig() { Datetime d = datetime.now(); Long uxtime = d.getTime() / 1000; //epoch unix time method in force.com String apisec = '&lt;secret&gt;'; String serial = 'callback=&lt;cors url&gt;&amp;timestamp=' + uxtime + apisec; //Signature needs params here need to match json params below Blob sha = Crypto.generateDigest('SHA1', Blob.valueOf(serial)); //Sha1 digest String sig = EncodingUtil.convertToHex(sha); //Hex conversion String jsoSerial = '{'; jsoSerial += '"api_key":"&lt;key&gt;",'; //these json params need to match signature params above jsoSerial += '"&lt;CORS_url&gt;",'; jsoSerial += '"signature":"' + sig + '",'; jsoSerial += '"timestamp":'+ uxtime; jsoSerial += '}'; return jsoSerial; </code></pre> <p>}</p></li> </ol> <p>Happy to answer any questions...</p>
 

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