错误416请求的范围不满足在c＃

我从下面的代码中收到错误。 错误416请求的范围不满足在我的自定义下载文件方法。我的文件是一个带有两个pdf的zip文件。此代码仅针对特定文件。我有55个文件，其中只有一个文件给我这个错误。文件正在从Azure网站目录上载/下载。错误416请求的范围不满足在c＃

见下面该文件的属性窗口：

这是我的代码：

try 
{ 
    var packageId = updates[0]; 
    var packagePath = updates[1]; 
    var packageNameAvailable = Path.GetFileName(updates[1]); 
    log.Info($"Package id {packageId} | {packageNameAvailable} is available to download. "); 
    DownloadPackagePath = string.Format(@"{0}\{1}", ApiConfigHelper.PackageRootDirectory, packageNameAvailable); 
    var url = new Uri(updates[1]); 
    **DownloadFile(url.OriginalString, DownloadPackagePath);** // problem here 
    result = true; 
} 
catch (Exception ex) 
{ 
    log.Info("Error occurred while downloading package, stopping download. Cleaning up resources. "); 
    log.Error($"Error:{ex.Message}", ex); 
    log.Info("Cleaning up started...."); 
    result = false; 
}

DownloadFile方法：

private void DownloadFile(string sourceURL, string destinationPath) 
    { 
     long fileSize = 0; 
     int bufferSize = 1024; 
     bufferSize *= 1000; 
     long existLen = 0; 
     FileStream saveFileStream = null; 
     Stream resStream = null; 
     try 
     { 
      log.Info("Download started...."); 

      if (File.Exists(destinationPath)) 
      { 
       FileInfo destinationFileInfo = new FileInfo(destinationPath); 
       existLen = destinationFileInfo.Length; 
       log.Info($"Resuming partial downloaded file from {existLen/1024} kB started...."); 
      } 

      if (existLen > 0) 
      { 
       saveFileStream = new FileStream(destinationPath, FileMode.Append, FileAccess.Write, FileShare.ReadWrite); 
      } 
      else 
      { 
       saveFileStream = new FileStream(destinationPath, FileMode.Create, FileAccess.Write, FileShare.ReadWrite); 
       FileInfo destinationFileInfo = new FileInfo(destinationPath); 
       log.Info($"Starting download FileName:{destinationFileInfo.Name} Size: {destinationFileInfo.Length/1024} kB ...."); 
      } 

      var httpRequest = (HttpWebRequest)WebRequest.Create(sourceURL); 
      httpRequest.AddRange((int)existLen); 
      var httpResponse = (HttpWebResponse)httpRequest.GetResponse(); 
      resStream = httpResponse.GetResponseStream(); 
      fileSize = httpResponse.ContentLength; 
      int byteSize; 
      byte[] downBuffer = new byte[bufferSize]; 

      while ((byteSize = resStream.Read(downBuffer, 0, downBuffer.Length)) > 0) 
      { 
       saveFileStream.Write(downBuffer, 0, byteSize); 
      } 
      log.Info("File downloaded successfully. Clean up started...."); 

     } 
     catch 
     { 
      throw; 

     } 
     finally 
     { 
      log.Info("Cleaning up unused streams...."); 
      if (saveFileStream != null) 
      { 
       saveFileStream.Close(); 
       saveFileStream.Dispose(); 

      } 
      if (resStream != null) 
      { 
       resStream.Close(); 
       resStream.Dispose(); 
      } 
      log.Info("DONE!!!"); 

     } 
    }

能否请您帮助我认同克this.My日志有一个条目说 恢复部分下载的文件从2494 kB开始....并坚持只有。

来源

2017-03-06 Amit Ranjan

从2494恢复部分下载的文件，根据日志信息KB开始

，请求范围为2494 * 1024（2553856）启动。 2,553,856字节大于可从文件属性窗口中看到的文件大小（2,492,548）。您请求的文件范围不存在，将导致416（请求范围不可满足）错误。

原因可能是存在一个存在的文件。它与您要下载的zip文件具有相同的名称。尝试删除同一文件夹中的存在文件将解决此问题。

来源

2017-03-07 03:06:53 Amor

错误416请求的范围不满足在c＃

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