HttpListenerResponse及其ContentLength64属性的无穷大值

问题描述

我遇到了代理HTTP流的问题.

I have run to a problem with Proxying http stream.

首先:我正在使用VLC播放器创建http协议媒体流服务器.

First: I am creating http protocol media streaming server with VLC player.

第二:我正在使用HttpListener侦听一个端口上的http请求，并尝试转发来自vlc服务器端口的响应作为来自第一个请求的响应.

Second: I'm listening http requests on one port with HttpListener and trying to forward response from vlc server port as a response from first one.

代理:

Client            Server(:1234)                         VLC(:2345)
       -request-> HttpListener
                  HttpWebRequest           -request->
                  HttpWebResponse         <-response-
                 Stream <=Copy= Stream
      <-response- HttpListenerResponse

一切正常.但是仍然存在一个问题.我正在尝试将实时流复制到HttpListenerResponse.但是我不能在其属性ContentLength64上附加负值. HttpWebResponse ContentLength属性的值为-1.它应该是内容的无限长度的值.

Everything works fine. But still there is one problem. I am trying to copy live stream to HttpListenerResponse. But I can't append negative value to its property ContentLength64. HttpWebResponse ContentLength property has value of -1. It should be the value for infinite length of content.

这是必需的，因为我正在转发实时流.

This is needed because I'm forwarding live stream.

void ProxyRequest(HttpListenerResponse httpResponse)
{
    HttpWebRequest HttpWReq = (HttpWebRequest)WebRequest.Create("http://localhost:2345");
    HttpWebResponse HttpWResp = (HttpWebResponse)HttpWReq.GetResponse();

    // this must be >=0. Throws ArgumentOutOfRangeException "The value specified for a set operation is less than zero."
    httpResponse.ContentLength64 = HttpWResp.ContentLength;

    byte[] buffer = new byte[32768];
    int bytesWritten = 0;
    while (true)
    {
        int read = HttpWResp.GetResponseStream().Read(buffer, 0, buffer.Length);
        if (read <= 0)
            break;
        httpResponse.OutputStream.Write(buffer, 0, read);
        bytesWritten += read;
    }
}

有人对此问题有解决方案吗?

Does anyone have a solution for this problem?

推荐答案

将SendChunked属性设置为true并删除ContentLength64值分配是解决方案.就像您提供的链接中所述.

Setting SendChunked property to true and removing ContentLength64 value assigning should be the solution. Like it's described in your provided link.

void ProxyRequest(HttpListenerResponse httpResponse)
{
    HttpWebRequest HttpWReq = (HttpWebRequest)WebRequest.Create("http://localhost:2345");
    HttpWebResponse HttpWResp = (HttpWebResponse)HttpWReq.GetResponse();

    // Solution!!!
    httpResponse.SendChunked = true;

    byte[] buffer = new byte[32768];
    int bytesWritten = 0;
    while (true)
    {
        int read = HttpWResp.GetResponseStream().Read(buffer, 0, buffer.Length);
        if (read <= 0)
            break;
        httpResponse.OutputStream.Write(buffer, 0, read);
        bytesWritten += read;
    }
}

这篇关于HttpListenerResponse及其ContentLength64属性的无穷大值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！