Windows Azure：服务器错误，404 - 未找到文件或目录

Question

我想将一些大小为 35MB 的文件上传到 blob 容器。 我已编写代码，将数据拆分为块并将其上传到 blob 容器并使用 PUT 形成 blob。

我测试了一些 大小 2MB 或其他文件的代码......它运行良好。但是当我尝试处理一个大的 MB 文件时，它给了我这个错误，

Server Error
404 - File or directory not found.
The resource you are looking for might have been removed, had its name changed, or is temporarily unavailable.

当我尝试处理大小为 6MB 的文件时，它给了我这个错误。

Server Error in '/' Application.
Runtime Error
Description: An application error occurred on the server. The current custom error settings for this application prevent the details of the application error from being viewed remotely (for security reasons). It could, however, be viewed by browsers running on the local server machine.

Details: To enable the details of this specific error message to be viewable on remote machines, please create a <customErrors> tag within a "web.config" configuration file located in the root directory of the current web application. This <customErrors> tag should then have its "mode" attribute set to "Off".

<!-- Web.Config Configuration File -->

<configuration>
    <system.web>
        <customErrors mode="Off"/>
    </system.web>
</configuration>


Notes: The current error page you are seeing can be replaced by a custom error page by modifying the "defaultRedirect" attribute of the application's <customErrors> configuration tag to point to a custom error page URL.

<!-- Web.Config Configuration File -->

<configuration>
    <system.web>
        <customErrors mode="RemoteOnly" defaultRedirect="mycustompage.htm"/>
    </system.web>
</configuration>

任何人都可以告诉我，如何解决这个问题。 ..

---

上传 blob 的代码。

protected void ButUploadBlocks_click(object sender, EventArgs e)
        {

            // store upladed file as a blob storage
            if (uplFileUpload.HasFile)
            {
                name = uplFileUpload.FileName;
                byte[] byteArray = uplFileUpload.FileBytes;
                Int64 contentLength = byteArray.Length;
                int numBytesPerBlock = 250 *1024; // 250KB per block
                int blocksCount = (int)Math.Ceiling((double)contentLength / numBytesPerBlock);  // number of blocks 
                MemoryStream ms ;
                int length = 0;
                List<string>BlockIds = new List<string>();
                string block;
                int offset = 0;

                // get refernce to the cloud blob container
                CloudBlobContainer blobContainer = cloudBlobClient.GetContainerReference("documents");

                if (textbox.Text != "")
                {
                    name = textbox.Text + "/" + name;

                }
                // set the name for the uploading files
                string UploadDocName = name;

                // get the blob reference and set the metadata properties
                CloudBlockBlob blob = blobContainer.GetBlockBlobReference(UploadDocName);
                blob.Properties.ContentType = uplFileUpload.PostedFile.ContentType;

                for (int i = 0; i < blocksCount; i++, offset = offset + numBytesPerBlock)
                {
                    block = Convert.ToBase64String(BitConverter.GetBytes(i));
                    ms = new MemoryStream();
                    if (i == (blocksCount - 1))
                    {
                        length = (int)contentLength - offset;
                    }
                    else
                    {
                        length = numBytesPerBlock;
                    }
                    ms.Write(byteArray, offset, length);
                    ms.Position = 0;

                    blob.PutBlock(block, ms, null);
                    BlockIds.Add(block);
                }

                blob.PutBlockList(BlockIds);

                blob.Metadata["FILETYPE"] = "text";
            }
        }

Answer 1

我的猜测是您遇到了 ASP.NET 限制...存在最大请求大小以及最大请求超时。我会在 web.config 中进行建议的更改，看看有什么异常。

Answer 2

如此处所述： http:// /robertgreiner.com/2012/08/404-error-when-uploading-large-files-in-windows-azure/

我今天尝试使用我的 MVC 4 站点将 30MB 文件上传到 Windows Azure。当文件达到 99% 时，我收到 404 错误，指出找不到我的上传操作。幸运的是，我在当天早些时候成功上传了大约一半大小的文件，因此我知道该网站并未完全损坏。

如果您遇到此错误，很可能您已经测试过在本地上传大文件，并意识到您的 Web.config 中需要类似的内容才能使一切正常工作：

<system.web>
    <httpRuntime maxRequestLength="1073741824" requestValidationMode="2.0" />
</system.web>

但是，没有人告诉您，Windows Azure（即 IIS 7）查看用于上传文件的完全不同的配置设置。

<system.webServer>
  <security>
    <requestFiltering>
      <requestLimits maxAllowedContentLength="1073741824" />
    </requestFiltering>
  </security>
</system.WebServer>