S3 Upload Issue - fine-uploader

Question

I am trying to upload a file on S3. I have been verified everything couple of times and all looks correct to me, but whenever I am trying to upload file, getting error message saying
responseText =
InvalidArgumentPOST requires exactly one file upload per request.0file3670E4EE52B3BCD5b3rOF/9WJHymo1ZENIOlrct/ZusAJ50AnSIP0df3K3+DdEcAFolJDx8qU6DH2N1l
Can someone please help me to findout what I am doing wrong here?
<div id="s3-fileuploader" class="dropArea"></div>
<script type="text/javascript">
j$ = jQuery.noConflict();
//block and unblock UIbased on endpoint url
function setUI(){
j$('div.dropArea').unblock();
}
$(document).ready(function () {
$('#s3-fileuploader').fineUploader({
request: {
endpoint: "https://{!bucketname}.s3.amazonaws.com",
accessKey: "{!key}"
},
signature: {
//always included
"expiration": "{!expireStr}",
signature : "{!signedPolicy}",
policy: "{!policy}",
"conditions":
[
//always included
{"acl": "public-read"},
//always included
{"bucket": "{!bucketname}"},
//not included in IE9 and older or Android 2.3.x and older
{"Content-Type": "{!ContentType}"},
//always included
{"key": "{!key}"},
//always included
{"x-amz-meta-qqfilename": "{!URLENCODE('test.jpg')}"},
]
},
cors: {
expected: true, //all requests are expected to be cross-domain requests
sendCredentials: false, //if you want cookies to be sent along with the request
allowXdr: true
},
autoUpload: true,
multiple:false,
debug: true,
text: {
uploadButton: '<i class="icon-plus icon-white">Select Files</i> '
},
uploadSuccess: {
endpoint: "{!redirectURL}"
}
}).on('submit',function(event,id,name){
//set endpoint
console.log('https://{!bucketname}.s3.amazonaws.com');
$(this).fineUploader('setEndpoint','https://{!bucketname}.s3.amazonaws.com');
});
setUI();
});
</script>
</body>

Answer 1

The signature option is supposed to include information about your signature server. Instead you are apparently attaching an (invalid) policy document to this option. Furthermore, you do not create the police document, Fine Uploader creates it for you and passes it to your signature server for signing.
Also you should be using the fineUploaderS3 jquery plugin for this.
It looks like you have not read the documentation that describes how Fine Uploader S3 works. I suggest starting with the guides on the home page of http://docs.fineuploader.com.