使用HttpWebResponse编码问题

问题描述

这是代码片段：

  HttpWebRequest webRequest =（HttpWebRequest）WebRequest.Create（request.RawUrl）; 
 WebRequest.DefaultWebProxy = null; //确保我们不会在代理中再次循环
 HttpWebResponse response =（HttpWebResponse）webRequest.GetResponse（）; 
 string charSet = response.CharacterSet; 
编码编码; 
 if（String.IsNullOrEmpty（charSet））
 encoding = Encoding.Default; 
 else 
 encoding = Encoding.GetEncoding（charSet）; 
 
 StreamReader resStream = new StreamReader（response.GetResponseStream（），encoding）; 
 return resStream.ReadToEnd（）; 
  

问题是如果我测试：

所有é显示不正常。我尝试将ASCII更改为UTF8，但仍显示错误。我已经在浏览器中测试了html文件，浏览器显示html文本，所以我很确定问题是在我用来下载html文件的方法。

我应该更改什么？

删除死亡ImageShack链接

更新1：代码和测试文件已更改

解决方案

首先，编写该代码的更简单的方法是使用StreamReader和ReadToEnd：

  HttpWebRequest webRequest =（HttpWebRequest）WebRequest.Create（myURL）; 
 using（HttpWebResponse response =（HttpWebResponse）webRequest.GetResponse（））
 {
 using（Stream resStream = response.GetResponseStream（））
 {
 StreamReader reader =新的StreamReader（resStream，Encoding。???）; 
 return reader.ReadToEnd（）; 
} 
} 
  

那么这是只是一个找到正确的问题编码。你如何创建文件？如果是记事本，那么您可能需要 Encoding.Default - 但这显然是不可移植的，因为它是您的 PC的默认编码。 >

在运行良好的Web服务器中，响应将在其标题中指示编码。话虽如此，响应标头有时候要求一件事，HTML在某些情况下要求另一个。

Here is a snippet of the code :

HttpWebRequest webRequest = (HttpWebRequest)WebRequest.Create(request.RawUrl);
WebRequest.DefaultWebProxy = null;//Ensure that we will not loop by going again in the proxy
HttpWebResponse response = (HttpWebResponse)webRequest.GetResponse();
string charSet = response.CharacterSet;
Encoding encoding;
if (String.IsNullOrEmpty(charSet))
encoding = Encoding.Default;
else
encoding = Encoding.GetEncoding(charSet);

StreamReader resStream = new StreamReader(response.GetResponseStream(), encoding);
return resStream.ReadToEnd();

The problem is if I test with : http://www.google.fr

All "é" are not displaying well. I have try to change ASCII to UTF8 and it still display wrong. I have tested the html file in a browser and the browser display the html text well so I am pretty sure the problem is in the method I use to download the html file.

What should I change?

removed dead ImageShack link

Update 1: Code and test file changed

解决方案

Firstly, the easier way of writing that code is to use a StreamReader and ReadToEnd:

HttpWebRequest webRequest = (HttpWebRequest)WebRequest.Create(myURL);
using (HttpWebResponse response = (HttpWebResponse)webRequest.GetResponse())
{
    using (Stream resStream = response.GetResponseStream())
    {
        StreamReader reader = new StreamReader(resStream, Encoding.???);
        return reader.ReadToEnd();
    }
}

Then it's "just" a matter of finding the right encoding. How did you create the file? If it's with Notepad then you probably want Encoding.Default - but that's obviously not portable, as it's the default encoding for your PC.

In a well-run web server, the response will indicate the encoding in its headers. Having said that, response headers sometimes claim one thing and the HTML claims another, in some cases.

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