Ich muss einen iterierten md5-Hash berechnen und an meine Upload-API senden. Aber ich weiß nicht wie.

Ich benutze das Tutorial hier:

http: //tutorialzine.com/2013/05/mini-ajax-file-upload-form

Zusammen mit blueimp jquery upload plugin.

Zum Senden von nur EINER DATEI (Dateigröße kleiner als Blockgröße) funktioniert alles einwandfrei. Aber wenn eine Datei chunked ist, dann habe ich keine Ahnung, wie man den Chunk fängt, um md5 davon zu bekommen.

Am Ende muss ich den md5 iterativ wie hier beschrieben machen:

https: //code.google.com/p/crypto-js/#Progressive_Hashin

$('#upload').fileupload({

    // This element will accept file drag/drop uploading
    dropZone: $('#drop'),

    type        : GLOBAL_FORM_METHOD,
    method      : "post",   // Type of data-send-method
    dataType    : "json",   // Type of data to recieve from api-call
    maxChunkSize: GLOBAL_CHUNK_SIZE,
    multipart   : true,

    // This function is called when a file is added to the queue;
    // either via the browse button, or via drag/drop:
    add: function (e, data)
    {
        var reader = new FileReader();
        var file = data.files[0];
        var jqXHR;

        var tpl = $('<li class="working"><input type="text" value="0" data-width="48" data-height="48"'+
            ' data-fgColor="#0788a5" data-readOnly="1" data-bgColor="#3e4043" /><p></p><div class="msg"></div><span></span></li>');

        // Append the file name and file size
        tpl.find('p')
            .text( file.name )
            .append('<i>' + formatFileSize( file.size ) + '</i>');

        // Add the HTML to the UL element
        data.context = tpl.appendTo(ul);

        // Initialize the knob plugin
        tpl.find('input').knob();

        // Listen for clicks on the cancel icon
        tpl.find('span').click(function()
        {
            if( tpl.hasClass('working') )
            {
                jqXHR.abort();
            }

            tpl.fadeOut( function()
            {
                tpl.remove();
            });
        });

        // Prevent XHR from sending data in "multipart/formData"
        data.postMessage = data.files[0].type;
        data.contentType = data.files[0].type;

        var chunksize = GLOBAL_CHUNK_SIZE > file.size ? file.size : GLOBAL_CHUNK_SIZE;

        // Describe the FileReader-DataLoad-Event
        reader.onload = function( event ) 
        {
            var binary = event.target.result;
            var md5 = CryptoJS.MD5(binary).toString();

            data.url += "&md5sum=" + md5;

            // D A T A   S E N D 
            jqXHR = data.submit();
        };

        // ADD url to XHR-object
        data.url = GLOBAL_FORM_ACTION;
        data.url += "?etf_id=" + GLOBAL_FOLDER_ID;
        data.url += "&file_title=" + file.name;

        // If the file will be send in one piece...
        if( GLOBAL_CHUNK_SIZE > file.size )
        {
            // ADD url-parameter to XHR-object
            data.url += "&size_chunk_start=" + 0;
            data.url += "&size_chunk_length=" + chunksize;
        }
        // This part for the chunks must be in "beforeSend"-Callback,
        // because, the chunk-related size-data is undefined in this case
        // but available there.

        // ADD url-parameter to XHR-object
        data.url += "&size_final=" + file.size;

        // Read md5-sum and send the file / chunk...
        // On multipart "file" is a chunk !
        reader.readAsBinaryString( file );
    },

    beforeSend : function(e, data)
    {
        var file = data.files[0];

        this.find(".msg").hide();

        // If the file will be send as chunks...
        if( GLOBAL_CHUNK_SIZE < file.size )
        {
            console.log( "Chunk data: ", data.uploadedBytes, data.chunkSize, file.size, data );

            // ADD url-parameter to XHR-object
            data.url += "&size_chunk_start=" + data.uploadedBytes;
            data.url += "&size_chunk_length=" + data.chunkSize;

            if( typeof this.attr('session_id') !== "undefined" )
                data.url += "&session_id=" + this.attr( 'session_id' );
        }

    });

Ich hoffe, du hilfst mir, das zu lösen.