如何在C＃中的WCF REST API上使用Stream将文件（图像/视频/等）正确上传到服务器？

Question

I'm setting up a function to upload images/videos on server using WCF REST API. The files are successfully uploaded in the proper destination folder, but they end up becoming unreadable no matter what kind of file it is.

Is there something wrong within my code (especially on the FileStream-Write part) that cause that to happen? Or is it possible that the problem lies elsewhere (such as the Web.config file)?

Here's my code snippet:

public string uploadFile(Stream fileStream)
        {
            String fileName = System.Web.HttpContext.Current.Request.QueryString["fileName"];
            String destFileName = HHCWCFApp.Properties.Settings.Default.TemporaryFilePath + fileName;
            String destLink = HHCWCFApp.Properties.Settings.Default.Hyperlink + fileName;

            try
            {
                int length = 256;
                int bytesRead = 0;
                Byte[] buffer = new Byte[length];
                using (FileStream fs = new FileStream(destFileName, FileMode.Create))
                {
                    do
                    {
                        bytesRead = fileStream.Read(buffer, 0, length);
                        fs.Write(buffer, 0, bytesRead);
                    }
                    while (bytesRead == length);
                }

                fileStream.Dispose();
            }
            catch (Exception ex)
            {
                Console.WriteLine(ex.ToString());
            }

            if (File.Exists(destFileName))
            {
                return destLink;
            }
            else
            {
                return "Not Found";
            }
        }

Answer 1

What kinds of files are you uploading? larger files may fall foul of the maximum request length, this is set in the web config as below

 <configuration> 
<system.web> 
    <httpRuntime maxRequestLength="xxxx" /> 
</system.web> 

Try a text file with only a few kb and if that works but the larger files don't then this could very well solve the issue. I've tested your code and there isn't a problem there.

also bear in mind that the IIS server you use may also have the maximum request length set which may override your value.

The default length is 4mb and you could write a function to retrieve the value so your client/calling code could do a check to see if the file it's going to pass exceeds the max size.

have a read here on Microsoft's page for a bit more info.

Edit: misread the code first time round, apologies