Question

注意：有人可以给我一个示例SAS字符串（在右侧区域中附加了块信息）需要发送到Azure blob存储吗？我认为这是我遇到的问题。我需要弄清楚每个块发送到Azure的字符串中的uri，key等的顺序。

我想要完成的是从服务中获取SAS密钥，修改字符串密钥，以便azure知道我正在发送块，然后使用sas密钥发送文件的各个块。网络客户端。我将每个文件分块为2MB块，并一次发送带有JavaScript库的2MB块。所以下面代码中的每个“文件”只是一个2MB的文件块。

问题：我可以成功从服务中获取SAS密钥，修改密钥以使其中包含块块信息，发送FIRST块，然后从blob存储服务器接收响应。但是，当我发送第二个块时，对blob存储的流的请求会挂起，然后最终会超时。超时似乎特别发生在对blob存储的流的第二个请求上。这段代码就在这里：

SERVER WEB客户端代码：

    using (Stream requestStream = request.GetRequestStream())
    {
        inputStream.CopyTo(requestStream, file.ContentLength);
    }

可能导致第二块超时的原因是什么？可能是钥匙的窗口太快关闭了吗？以下是我的代码和一些截图：

    private void WriteToBlob(HttpPostedFileBase file, string BlockId, FileProp fp)
    {
        var inputStream = file.InputStream;

        Microsoft.WindowsAzure.StorageCredentialsSharedAccessSignature credentials =
            new Microsoft.WindowsAzure.StorageCredentialsSharedAccessSignature(fp.facct);


        string queryString = (new Uri(fp.folderName)).Query;

        string RequestUri = string.Format(System.Globalization.CultureInfo.InvariantCulture, "{0}/{1}{2}&comp=block&blockid={3}",
            fp.folderName, fp.fileName, queryString, Convert.ToBase64String(Encoding.UTF8.GetBytes(BlockId)));

        HttpWebRequest request = (HttpWebRequest)WebRequest.Create(RequestUri);
        request.Method = "PUT";
        request.ContentLength = inputStream.Length;
        using (Stream requestStream = request.GetRequestStream())
        {
            inputStream.CopyTo(requestStream, file.ContentLength);
        }

    }

JAVASCRIPT代码向网络服务器客户端发送信息：

        var running = 0;
    var chunksize = (Modernizr.blobconstructor) ? uploadChunkSize : null;    //if browser support Blob API
    window.xhrPool = [];
    $('#fileupload').fileupload({
        url: url,
        //formData: [{ name: 'param1', value: 1 }, { name: 'param2', value: 2}],
        singleFileUploads: true, //each file is using an individual XHR request
        //limitMultiFileUploads: 2, //This option is ignored, if singleFileUploads is set to true.
        multipart: true,
        maxChunkSize: chunksize, //server side is in streaming mode
        sequentialUploads: true, //Set this option to true to issue all file upload requests in a sequential order instead of simultaneous requests.
        dataType: 'json',
        autoUpload: true,
        //acceptFileTypes: /(\.|\/)(gif|jpe?g|png)$/i,
        progressInterval: 100,
        bitrateInterval: 100,
        maxFileSize: uploadFileSizeLimit
    }).on('fileuploadadd', function (e, data) {

        var filename = data.files[0].name;
        var filesize = data.files[0].size;
        if (filesize == 0) {
            var zeroSizeErrMsg = sceneLayoutService.format('This file {filename} is empty please select files again without it. ', { filename: filename });
            sceneLayoutService.showErrorDialog(zeroSizeErrMsg);
            return;
        }

        if (window.availableStorageSize != null && window.availableStorageSize != '') {
            if (filesize > window.availableStorageSize) {
                var overSizeErrMsg = sceneLayoutService.format('File size of {filename} exceeds available storage space in your cloud drive. ', { filename: filename });
                sceneLayoutService.showErrorDialog(overSizeErrMsg);
                return;
            }
        } else {
            alert('Unable to retrieve the storage usage.');
        }

        data.jqXHR = data.submit();
        window.xhrPool.push(data.jqXHR);
        sceneLayoutService.addFileToProgressDialog(data, cancelButton);

    }).on('fileuploadprocessalways', function (e, data) {

    }).on('fileuploadprogressall', function (e, data) {

    }).on('fileuploadsubmit', function (e, data) {

        var filesize = data.files[0].size;
        if (filesize == 0) {
            return false;
        }

        if (window.availableStorageSize != null && window.availableStorageSize != '') {
            if (filesize > window.availableStorageSize) {
                return false;
            }
        }
        $('#dlgProgress').parent().show();
        running++;
        sceneLayoutService.showProgressDialog('Uploading files to ' + currentUser + '\'s Cloud Storage ...', abortAllUploads);
        return true;

    }).on('fileuploaddone', function (e, data) {

        running--;
        updateStorageQuota(function () {
            var usedStorageSize = (window.usedStorageSize != null) ? bytesToSize(window.usedStorageSize, 2) : 0;
            var totalStorageSize = (window.totalStorageSize != null) ? bytesToSize(window.totalStorageSize, 2) : 0;
            var usageFooterStr = sceneLayoutService.format("Using {used} of {total} (%)", { used: usedStorageSize, total: totalStorageSize });
            $('div.dlgProgressFooter').text(usageFooterStr);
        });


        var docGridUrl = window.baseUrl + '/CloudStorage/ChangePage?page=1&rand=' + sceneLayoutService.getRandomString(4);
        $('#docGridPartial').load(docGridUrl, function () {
            grid.init({
                pageNumber: 1,
                url: window.baseUrl + '/CloudStorage/ChangePage',
                sortColumn: '',
                sortDirection: ''
            });
        });

        sceneLayoutService.updateFileUploadFinalStatus(data, 'done');

        if (!data.result.success) {
            debugger;
            var errMsg = "";
            if (data.result != null) {
                if (data.result.message != null) {
                    errMsg += data.result.message;
                }
                if (data.result.error != null)
                    errMsg += data.result.error;
            }
            sceneLayoutService.showErrorDialog(errMsg);
        }
        window.removeXHRfromPool(data);

        if (running == 0) {
            $('#dlgProgress').parent().hide();
            $('#progresses').empty();
        }
    }).on('fileuploadfail', function (e, data) {
        running--;

        sceneLayoutService.updateFileUploadFinalStatus(data, 'fail');

        window.removeXHRfromPool(data);

        if (running == 0) {
            $('#dlgProgress').parent().hide();
            $('#progresses').empty();
        }
    }).on('fileuploadprogress', function (e, data) {

        //XHR upload onProgress event not fired at server-defined intervals/not supported in IE8 and IE9,
        //will be supported in IE10 in terms of XMLHttpRequest Level 2 specification, http://caniuse.com/xhr2
        sceneLayoutService.updateFileUploadProgress(data);
    });

enter image description here

Answer 1

问题已解决。事实证明SAS URI的格式不正确。以下是Sas URI（对于容器，在我的情况下）应该如何显示：

http://container_uri/filename?key

使用REST API在块中上传Blob在第二个块上超时

1 个答案: