REST API Media File Post

Question

I'm trying to upload files to media gallery.. using just the rest calls. I keep getting an error: Only a posted file, file URL, or file upload context is valid, but not more than one. 
 This rest call is in a method called model.createMediaPost(args) but this is just the important part which is the rest call $.telligent.evolution.post({
 url: _baseUrl + _mediaRestApi,
 callback: callback ? callback : _callbackname,
 data: { 
 "mediagalleryid": _mediagalleryId,
 "Name": _name,
 "FileName":_filename, 
 "FileData": _filedata,
 "Tags": _tags,
 "ContentType":_contenttype
 },
 cache:false})
 .error(function (err) {
 console.info("error with media file rest call:", err);
 _error = err;
 }).success(function (r) {

if (typeof callback !== 'undefined' && typeof callback === 'function') {
 callback(r);
 }

_results = r;
 }); 
 
 The byte[] maybe okay... but here is the code that calls the above method "createMediaPost": var filedata = [];
var reader = new FileReader();

reader.onloadend = function (evt){
 if (evt.target.readyState == FileReader.DONE) {
 var arrayBuffer = evt.target.result,
 array = new Uint8Array(arrayBuffer);
 for (var i = 0; i < array.length; i++) {
 filedata.push(array[i]);
 }
 
 model.createMediaPost(mediagalleryId, name, description, filename, filedata, tags, function(result){
 console.info("media gallery posted");
 console.info(result);

});
 }

};
	reader.readAsArrayBuffer(file);

Harley Parks · Accepted Answer

Was able to use the readAsText(file) and this was easily uploaded... it's not a byte[] but it worked anyway. here is what worked for me... oh.. the above ContentType was "text/plain" so setting this correctly is required. 
 var filedata = [];
var reader = new FileReader();
 
reader.onloadend = function (evt){
if (evt.target.readyState == FileReader.DONE) {
 //var arrayBuffer = evt.target.result,
 // array = new Uint8Array(arrayBuffer);
 //for (var i = 0; i < array.length; i++) {
 //filedata.push(array[i]);
 //}
 filedata =(evt.target.result);
 model.createMediaPost(options.fileUploadContext,mediagalleryId, name, description, filename, file, filedata, tags, function(result){
 console.info("media gallery posted");
 console.info(result);
 
 });
 }
 
 };
 //reader.readAsArrayBuffer(file);
 reader.readAsText(file);

REST API Media File Post

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