C# 为什么我的 HTTP Web 请求代码不发送请求？

Why does My HTTP Web Request Code Not Send a Request?

提问by

How to post the following HTTP requests in C#

如何在 C# 中发布以下 HTTP 请求

POST http://10.0.0.1/st_poe.cgi

Accept: image/jpeg, application/x-ms-application, image/gif, application/xaml+xml, image/pjpeg, application/x-ms-xbap, application/vnd.ms-excel, application/vnd.ms-powerpoint, application/msword, application/x-shockwave-flash, */*
Referer: http://10.0.0.1/RST_st_poe.htm
Accept-Language: en-US
User-Agent: Mozilla/4.0 (compatible; MSIE 8.0; Windows NT 6.1; Trident/4.0; SLCC2; .NET CLR 2.0.50727; .NET CLR 3.5.30729; .NET CLR 3.0.30729; Media Center PC 6.0)
Content-Type: application/x-www-form-urlencoded
Accept-Encoding: gzip, deflate
Host: 10.0.0.1
Content-Length: 21
Connection: Keep-Alive
Pragma: no-cache
Authorization: Basic YWStaW47c3Jsa3NobQ==

ConMethod=++Connect++

I'm trying to do it with the following code. It is not working.

我正在尝试使用以下代码来做到这一点。它不工作。

            string user = Convert.ToBase64String(System.Text.Encoding.UTF8.GetBytes(username + ":" + password));

            byte[] bytes = System.Text.Encoding.ASCII.GetBytes("ConMethod=++Connect++");

            HttpWebRequest request = (HttpWebRequest)WebRequest.Create("http://10.0.0.1/st_poe.cgi");

            request.Method = "POST";
            request.Headers.Add("Accept: image/jpeg, application/x-ms-application, image/gif, application/xaml+xml, image/pjpeg, application/x-ms-xbap, application/vnd.ms-excel, application/vnd.ms-powerpoint, application/msword, application/x-shockwave-flash, */*");
            request.Referer = "http://10.0.0.1/RST_st_poe.htm";
            request.Headers.Add("Accept-Language: en-US");
            request.UserAgent = "Mozilla/4.0 (compatible; MSIE 8.0; Windows NT 6.1; Trident/4.0; SLCC2; .NET CLR 2.0.50727; .NET CLR 3.5.30729; .NET CLR 3.0.30729; Media Center PC 6.0)";
            request.ContentType = "application/x-www-form-urlencoded";
            request.Headers.Add("Accept-Encoding: gzip, deflate");
            request.ContentLength = bytes.Length;
            request.Headers.Add("Host: 10.0.0.1");
            request.Headers.Add("Connection: Keep-Alive");
            request.Headers.Add("Pragma: no-cache");
            request.Headers.Add("Authorization: Basic "+user);


            Stream reqStream = request.GetRequestStream();

            reqStream.Write(bytes, 0, bytes.Length);

            reqStream.Close();

Can anyone point out where I'm messing up. I'm using HttpWebRequest for the first time.

谁能指出我搞砸的地方。我是第一次使用 HttpWebRequest。

采纳答案by Mehrdad Afshari

You should perform the actual request with

您应该执行实际请求

var response = request.GetResponse();

Alternatively, you can use the simpler System.Net.WebClientclass:

或者，您可以使用更简单的System.Net.WebClient类：

var client = new WebClient();
client.Headers["..."] = ...;
// Use one of the DownloadXXX/UploadXXX methods.
var responseBody = client.UploadData("Url", dataToUpload);

回答by John Saunders

Mehrdadhas it right. I'll only add that if you're going to stick to HttpWebRequest, then you need to learn to use "using" blocks for any resource you allocate that implements IDisposable:

梅尔达德说得对。我只会补充一点，如果您要坚持使用 HttpWebRequest，那么您需要学习对您分配的任何实现 IDisposable 的资源使用“使用”块：

var user =
    Convert.ToBase64String(
        Encoding.UTF8.GetBytes(username + ":" + password));

var bytes = Encoding.ASCII.GetBytes("ConMethod=++Connect++");

var request =
    (HttpWebRequest) WebRequest.Create("http://10.0.0.1/st_poe.cgi");

request.Method = "POST";
request.Headers.Add(
    "Accept: image/jpeg, application/x-ms-application, image/gif, application/xaml+xml, image/pjpeg, application/x-ms-xbap, application/vnd.ms-excel, application/vnd.ms-powerpoint, application/msword, application/x-shockwave-flash, */*");
request.Referer = "http://10.0.0.1/RST_st_poe.htm";
request.Headers.Add("Accept-Language: en-US");
request.UserAgent =
    "Mozilla/4.0 (compatible; MSIE 8.0; Windows NT 6.1; Trident/4.0; SLCC2; .NET CLR 2.0.50727; .NET CLR 3.5.30729; .NET CLR 3.0.30729; Media Center PC 6.0)";
request.ContentType = "application/x-www-form-urlencoded";
request.Headers.Add("Accept-Encoding: gzip, deflate");
request.ContentLength = bytes.Length;
request.Headers.Add("Host: 10.0.0.1");
request.Headers.Add("Connection: Keep-Alive");
request.Headers.Add("Pragma: no-cache");
request.Headers.Add("Authorization: Basic " + user);

using (var reqStream = request.GetRequestStream())
{
    reqStream.Write(bytes, 0, bytes.Length);
}

using (var response = (HttpWebResponse) request.GetResponse())
{
    using (var responseStream = response.GetResponseStream())
    {
        using (var reader = new StreamReader(responseStream))
        {
            return reader.ReadToEnd();
        }
    }
}