关于jquery：Vimeo上传使用块

    _uploader_process = $.ajax({
        url: _endpoint,
        type: ‘PUT’,
        beforeSend: function (request)
        {
            //if (starting_byte != 0){ // Send the first chunk with without content-range header
                // If this function is being called to resume a file, add the starting offset
                var content_range_header ="bytes" + starting_byte +"-" + ending_byte +"/" + _file.size;
                request.setRequestHeader("Content-Range", content_range_header);
            //}
            request.setRequestHeader("Content-Type", _file.type);
            //request.setRequestHeader("Content-Length", data.byteLength);
        },
        processData: false,
        xhr: function() {  // custom xhr
            myXhr = $.ajaxSettings.xhr();
            if(myXhr.upload){ // check if upload property exists
                myXhr.upload.addEventListener(‘progress’, progressHandlingFunction, false); // for handling the progress of the upload
            }
            return myXhr;
        },
        //Ajax events
        success: function() {
            if (ending_byte < _file.size – 1){ // Not complete (chunk mode)
                var next_upload_byte = ending_byte + 1;
                retryUpload(); // Check for uploaded bytes before next chunk upload (this creates an infinite loop since vimeo only reports the last byte uploaded, since the Content-Range header above is not being recognised) – Or
                //uploadFilePart(next_upload_byte, next_upload_byte + _chunk_size – 1); // – doesn’t check uploaded bytes before send of next chunk (Uploads all parts, but vimeo only registers the last chunk)
            } else { // Complete!
                //retryUpload(); // Check to make sure the entire file was uploaded
                $(‘.auto_uploader #status_display’).attr(‘class’, ‘tick’);
                resetButtons();
                _completeFunction(); //Call user defined callback
            }
        },
        error: function(data) {
            console.log(data.responseText);
            if (!_paused && _file != null){ //Aborting (pausing) causes an error
                // Retry the upload if we fail
                if (_retry_count < _retry_limit){
                    _retry_count = _retry_count + 1;
                    console.log(‘Error occurred while uploading file"’ + _file.name + ‘",  retry #’ + _retry_count + ‘ in ‘ + _retry_count * 10 + ‘ sec’);
                    setTimeout(function() {   //calls click event after a certain time
                        retryUpload(); // Call the retry upload method in 10 sec
                    }, 10000);
                } else if (_retry_count == _retry_limit){
                    //We’ve tried enough!});
                    resetButtons();
                    $(‘.auto_uploader #status_display’).attr(‘class’, ‘error’);
                    alert(‘Maximum number of retries exceeded!’);
                }
            }
        },
        //error: errorHandler,
        // Form data
        data: data_to_send,
        //Options to tell JQuery not to process data or worry about content-type
        cache: false,
        contentType: false
    });
}

    if (byte_request.status === 308) {
        range_header = xhr.getResponseHeader(‘Range’);

        // The Range header will return something like"bytes=0-215235".
        // This grabs the group of numbers AFTER the"-" character,
        // which is the total bytes on the server.
        bytes_received = parseInt(range_header.split(‘-‘)[1], 10);
    }
}