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Question

我在尝试将文件直接上传到 azure blob 存储时遇到问题。我正在使用 ajax 调用将 post 请求发送到 ashx 处理程序以分块上传 blob。我遇到的问题是处理程序没有收到从 ajax 帖子发送的文件块。

通过查看 firebug 中的请求，我可以看到页面正在正确接收帖子，

-----------------------------265001916915724 Content-Disposition: form-data; >name="Slice"; filename="blob" Content-Type: application/octet-stream

我注意到处理程序上的输入流有文件块，包括来自请求的额外字节。我试图从输入流中只读取文件块的大小，但这导致文件损坏。

我的灵感来自 http://code.msdn.microsoft.com/windowsazure/Silverlight-Azure-Blob-3b773e26 ，我只是将它从 MVC3 转换为使用标准 aspx。

这是使用ajax将文件块发送到aspx页面的调用，

var sendFile = function (blockLength) {
var start = 0,
    end = Math.min(blockLength, uploader.file.size),
    incrimentalIdentifier = 1,
    retryCount = 0,
    sendNextChunk, fileChunk;
uploader.displayStatusMessage();
sendNextChunk = function () {
    fileChunk = new FormData();
    uploader.renderProgress(incrimentalIdentifier);
    if (uploader.file.slice) {
        fileChunk.append('Slice', uploader.file.slice(start, end));
    }
    else if (uploader.file.webkitSlice) {
        fileChunk.append('Slice', uploader.file.webkitSlice(start, end));
    }
    else if (uploader.file.mozSlice) {
        fileChunk.append('Slice', uploader.file.mozSlice(start, end));
    }
    else {
        uploader.displayLabel(operationType.UNSUPPORTED_BROWSER);
        return;
    }
    var testcode = 'http://localhost:56307/handler1.ashx?create=0&blockid=' + incrimentalIdentifier + '&filename=' + uploader.file.name + '&totalBlocks=' + uploader.totalBlocks;
    jqxhr = $.ajax({
        async: true,         
        url: testcode,
        data: fileChunk,
        contentType: false,
        processData:false,
        dataType: 'text json',          
        type: 'POST',
        error: function (request, error) {
            if (error !== 'abort' && retryCount < maxRetries) {
                ++retryCount;
                setTimeout(sendNextChunk, retryAfterSeconds * 1000);
            }

            if (error === 'abort') {
                uploader.displayLabel(operationType.CANCELLED);
                uploader.resetControls();
                uploader = null;
            }
            else {
                if (retryCount === maxRetries) {
                    uploader.uploadError(request.responseText);
                    uploader.resetControls();
                    uploader = null;
                }
                else {
                    uploader.displayLabel(operationType.RESUME_UPLOAD);
                }
            }

            return;
        },
        success: function (notice) {
            if (notice.error || notice.isLastBlock) {
                uploader.renderProgress(uploader.totalBlocks + 1);
                uploader.displayStatusMessage(notice.message);
                uploader.resetControls();
                uploader = null;
                return;
            }

            ++incrimentalIdentifier;
            start = (incrimentalIdentifier - 1) * blockLength;
            end = Math.min(incrimentalIdentifier * blockLength, uploader.file.size);
            retryCount = 0;
            sendNextChunk();
        }
    });
};

非常感谢任何可以帮助我的东西。

Answer 1

ASPX 是故意的吗？在 http://localhost:56307/handler1 . ashx ?create=0&blockid?