如何从 WebRequest 获取流中的文本？

Question

所以，这是我编造的一个场景，我正在制作自己的网络浏览器，我想确保向网络服务器发送正确的 POST 文本。

为了实现这一点，我需要在调用 GetResponseStream().

之前获取 WebRequest 为我创建的 POST 文本

我试图通读来自 WebRequest.GetRequestStream() 的流，但我认为这不是一种方法。

我不希望 Web 服务器响应 HTML 纯文本。我需要获取的 POST 文本必须如下所示：

POST http://www.some_web_server.com/default.aspx HTTP/1.1 
Cache-Control : max-age=0 Connection : keep-alive .....

提前致谢。

[更新]

很明显，我已经在我的 WebRequest 实例中编写了所有 request(POST) 文本。

有什么方法可以方便地从中获取整个纯文本，而不是使用单独的获取属性，例如 ContentType 或 Headers？

（因为我懒得 'assemble' 我指定的所有 headers 到整个完整的 POST 文本中，Web 服务器最终会看到。）

// This might be a very poor code to approach.

public void Show_Full_POST_Text(WebRequest req)
{
    // For example.
    String strRawText = req.GetRequestLiteral();

    // Your POST text looks like this!
    ShowToUser(strRawText);
}

public void Foo()
{
    // ...

    Show_Full_POST_Text(req);
    var ResponseStream = req.GetResponseStream();

    // Continue.
}

Answer 1

你的问题很含糊，但是，我相信你正在寻找的是在 Webrequest 中包含 headers。 The MSDN has a good example。见下文：

public static void Main (string[] args)
{
    HttpWebRequest request = (HttpWebRequest)WebRequest.Create (args[0]);

    // Set some reasonable limits on resources used by this request
    request.MaximumAutomaticRedirections = 4;
    request.MaximumResponseHeadersLength = 4; //This sets the max headers coming back to your response.
    // Set credentials to use for this request.
    request.Credentials = CredentialCache.DefaultCredentials;
    HttpWebResponse response = (HttpWebResponse)request.GetResponse ();

    Console.WriteLine ("Content length is {0}", response.ContentLength);
    Console.WriteLine ("Content type is {0}", response.ContentType);

    // Get the stream associated with the response.
    Stream receiveStream = response.GetResponseStream ();

    // Pipes the stream to a higher level stream reader with the required encoding format. 
    StreamReader readStream = new StreamReader (receiveStream, Encoding.UTF8);

    Console.WriteLine ("Response stream received.");
    Console.WriteLine (readStream.ReadToEnd ());
    response.Close ();
    readStream.Close ();
}

Answer 2

如果您说您不想通过请求属性（例如 "request.ContentType" 和其他通过 header collection 获取一些 header，那么您可以只使用 header collection 因为它已经包含了 ContentType 的密钥。

using System;
using System.Collections.Generic;
using System.Net;

namespace Demo
{
    class Program
    {
        static void Main(string[] args)
        {
            HttpWebRequest request = (HttpWebRequest)WebRequest.Create("http://www.example.com");
            request.Method = "POST";
            request.ContentType = "image/png";

            Console.WriteLine(GetRequestAsString(request));
            Console.ReadKey();
        }

        public static string GetRequestAsString(HttpWebRequest request)
        {
            string str = request.Method + " " + request.RequestUri + " HTTP/" + request.ProtocolVersion + Environment.NewLine;
            string[] headerKeys = request.Headers.AllKeys;

            foreach (string key in headerKeys)
            {
                str += key + ":" + request.Headers[key];
            }

            return str;
        }
    }
}

如何从 WebRequest 获取流中的文本？

How to get text in stream from WebRequest?

c#

webrequest