C# 使用 HttpWebRequest 发布表单数据
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Post form data using HttpWebRequest
提问by wsplinter
I want to post some form data to a specified URL that isn't inside my own web application. It has the same domain, such like "domain.client.nl". The web application has a url "web.domain.client.nl" en the url where I want to post to is "idp.domain.client.nl". But my code does nothing..... does someone knows what I'm doing wrong?
我想将一些表单数据发布到不在我自己的 Web 应用程序中的指定 URL。它具有相同的域，例如“domain.client.nl”。Web 应用程序有一个网址“web.domain.client.nl”，我想发布的网址是“idp.domain.client.nl”。但是我的代码什么也没做..... 有人知道我做错了什么吗？
Wouter
沃特
StringBuilder postData = new StringBuilder();
postData.Append(HttpUtility.UrlEncode(String.Format("username={0}&", uname)));
postData.Append(HttpUtility.UrlEncode(String.Format("password={0}&", pword)));
postData.Append(HttpUtility.UrlEncode(String.Format("url_success={0}&", urlSuccess)));
postData.Append(HttpUtility.UrlEncode(String.Format("url_failed={0}", urlFailed)));
ASCIIEncoding ascii = new ASCIIEncoding();
byte[] postBytes = ascii.GetBytes(postData.ToString());
// set up request object
HttpWebRequest request;
try
{
request = (HttpWebRequest)HttpWebRequest.Create(WebSiteConstants.UrlIdp);
}
catch (UriFormatException)
{
request = null;
}
if (request == null)
throw new ApplicationException("Invalid URL: " + WebSiteConstants.UrlIdp);
request.Method = "POST";
request.ContentType = "application/x-www-form-urlencoded";
request.ContentLength = postBytes.Length;
request.UserAgent = "Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1; SV1; .NET CLR 1.1.4322; .NET CLR 2.0.50727)";
// add post data to request
Stream postStream = request.GetRequestStream();
postStream.Write(postBytes, 0, postBytes.Length);
postStream.Flush();
postStream.Close();
回答by jgauffin
You are encoding the form incorrectly. You should only encode the values:
您对表单的编码不正确。您应该只对值进行编码：
StringBuilder postData = new StringBuilder();
postData.Append("username=" + HttpUtility.UrlEncode(uname) + "&");
postData.Append("password=" + HttpUtility.UrlEncode(pword) + "&");
postData.Append("url_success=" + HttpUtility.UrlEncode(urlSuccess) + "&");
postData.Append("url_failed=" + HttpUtility.UrlEncode(urlFailed));
edit
编辑
I was incorrect. According to RFC1866 section 8.2.1both names and values should be encoded.
我错了。根据RFC1866 第 8.2.1 节，名称和值都应该被编码。
But for the given example, the names do not have any characters that needs to be encoded, so in this case my code example is correct ;)
但是对于给定的示例，名称没有任何需要编码的字符，因此在这种情况下，我的代码示例是正确的；)
The code in the question is still incorrect as it would encode the equal sign which is the reason to why the web server cannot decode it.
问题中的代码仍然不正确，因为它会对等号进行编码，这就是 Web 服务器无法对其进行解码的原因。
A more proper way would have been:
更合适的方法是：
StringBuilder postData = new StringBuilder();
postData.AppendUrlEncoded("username", uname);
postData.AppendUrlEncoded("password", pword);
postData.AppendUrlEncoded("url_success", urlSuccess);
postData.AppendUrlEncoded("url_failed", urlFailed);
//in an extension class
public static void AppendUrlEncoded(this StringBuilder sb, string name, string value)
{
if (sb.Length != 0)
sb.Append("&");
sb.Append(HttpUtility.UrlEncode(name));
sb.Append("=");
sb.Append(HttpUtility.UrlEncode(value));
}
回答by user3389691
Both the field name and the value should be url encoded. format of the post data and query string are the same
字段名和值都应该是 url 编码的。帖子数据和查询字符串的格式相同
The .net way of doing is something like this
.net 的做法是这样的
NameValueCollection outgoingQueryString = HttpUtility.ParseQueryString(String.Empty);
outgoingQueryString.Add("field1","value1");
outgoingQueryString.Add("field2", "value2");
string postdata = outgoingQueryString.ToString();
This will take care of encoding the fields and the value names
这将负责对字段和值名称进行编码
回答by Parisa Shamsaie
Try this:
尝试这个：
var request = (HttpWebRequest)WebRequest.Create("http://www.example.com/recepticle.aspx");
var postData = "thing1=hello";
postData += "&thing2=world";
var data = Encoding.ASCII.GetBytes(postData);
request.Method = "POST";
request.ContentType = "application/x-www-form-urlencoded";
request.ContentLength = data.Length;
using (var stream = request.GetRequestStream())
{
stream.Write(data, 0, data.Length);
}
var response = (HttpWebResponse)request.GetResponse();
var responseString = new StreamReader(response.GetResponseStream()).ReadToEnd();
