如何使用WebResponse下载.wmv文件 [英] How to use WebResponse to Download .wmv file

问题描述

我正在使用以下代码通过WebResponse抓取wmv文件.我正在使用线程调用此函数:

I'm using the following code to grab a wmv file through a WebResponse. I'm using a thread to call this function:

static void GetPage(object data)
{
    // Cast the object to a ThreadInfo
    ThreadInfo ti = (ThreadInfo)data;

    // Request the URL
    WebResponse wr = WebRequest.Create(ti.url).GetResponse();

    // Display the value for the Content-Length header
    Console.WriteLine(ti.url + ": " + wr.Headers["Content-Length"]);
    string toBeSaved = @"C:\Users\Kevin\Downloads\TempFiles" + wr.ResponseUri.PathAndQuery;        
    StreamWriter streamWriter = new StreamWriter(toBeSaved);

    MemoryStream m = new MemoryStream();
    Stream receiveStream = wr.GetResponseStream();
    using (StreamReader sr = new StreamReader(receiveStream))
    {
        while (sr.Peek() >= 0)
        {
            m.WriteByte((byte)sr.Read());
        }
        streamWriter.Write(sr.ReadToEnd());
        sr.Close();
        wr.Close();
    }

    streamWriter.Flush();
    streamWriter.Close();

    // streamReader.Close();
    // Let the parent thread know the process is done
    ti.are.Set();

    wr.Close();
}

该文件似乎可以正常下载，但是Windows Media Viewer无法正确打开该文件.关于无法支持文件类型的一些愚蠢的错误.

The file seems to download just fine, but Windows Media Viewer cannot open the file properly. Some silly error about not being able to support the file type.

我想念的是一件多么容易的事情?

What incredibly easy thing am I missing?

推荐答案

您只需要将其下载为二进制文件而不是文本文件即可.这是一种应该为您解决问题的方法.

You just need to download it as binary instead of text. Here's a method that should do the trick for you.

public void DownloadFile(string url, string toLocalPath)
{
    byte[] result = null;
    byte[] buffer = new byte[4097];

    WebRequest wr = WebRequest.Create(url);

    WebResponse response = wr.GetResponse();
    Stream responseStream = response.GetResponseStream;
    MemoryStream memoryStream = new MemoryStream();

    int count = 0;

    do {
        count = responseStream.Read(buffer, 0, buffer.Length);
        memoryStream.Write(buffer, 0, count);

        if (count == 0) {
            break;
        }
    }
    while (true);

    result = memoryStream.ToArray;

    FileStream fs = new FileStream(toLocalPath, FileMode.OpenOrCreate, FileAccess.ReadWrite);

    fs.Write(result, 0, result.Length);

    fs.Close();
    memoryStream.Close();
    responseStream.Close();
}

这篇关于如何使用WebResponse下载.wmv文件的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！