使用 C# 进行远程 HTTP Post
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Remote HTTP Post with C#
提问by localhost
How do you do a Remote HTTP Post (request) in C#?
你如何在 C# 中执行远程 HTTP Post（请求）？
回答by bendewey
You can use WCF or create a WebRequest
您可以使用 WCF 或创建一个 WebRequest
var httpRequest = (HttpWebRequest)WebRequest.Create("http://localhost/service.svc");
var httpRequest.Method = "POST";
using (var outputStream = httpRequest.GetRequestStream())
{
// some complicated logic to create the message
}
var response = httpRequest.GetResponse();
using (var stream = response.GetResponseStream())
{
// some complicated logic to handle the response message.
}
回答by BobbyShaftoe
I use thisvery simple class:
我使用这个非常简单的类：
public class RemotePost{
private System.Collections.Specialized.NameValueCollection Inputs
= new System.Collections.Specialized.NameValueCollection() ;
public string Url = "" ;
public string Method = "post" ;
public string FormName = "form1" ;
public void Add( string name, string value ){
Inputs.Add(name, value ) ;
}
public void Post(){
System.Web.HttpContext.Current.Response.Clear() ;
System.Web.HttpContext.Current.Response.Write( "<html><head>" ) ;
System.Web.HttpContext.Current.Response.Write( string .Format( "</head><body onload=\"document.{0}.submit()\">" ,FormName)) ;
System.Web.HttpContext.Current.Response.Write( string .Format( "<form name=\"{0}\" method=\"{1}\" action=\"{2}\" >" ,
FormName,Method,Url)) ;
for ( int i = 0 ; i< Inputs.Keys.Count ; i++){
System.Web.HttpContext.Current.Response.Write( string .Format( "<input name=\"{0}\" type=\"hidden\" value=\"{1}\">" ,Inputs.Keys[i],Inputs[Inputs.Keys[i]])) ;
}
System.Web.HttpContext.Current.Response.Write( "</form>" ) ;
System.Web.HttpContext.Current.Response.Write( "</body></html>" ) ;
System.Web.HttpContext.Current.Response.End() ;
}
}
And you use it thusly:
你这样使用它：
RemotePost myremotepost = new RemotePost() ;
myremotepost.Url = "http://www.jigar.net/demo/HttpRequestDemoServer.aspx" ;
myremotepost.Add( "field1" , "Huckleberry" ) ;
myremotepost.Add( "field2" , "Finn" ) ;
myremotepost.Post() ;
Very clean, easy to use and encapsulates all the muck. I prefer this to using the HttpWebRequest and so forth directly.
非常干净，易于使用并封装了所有垃圾。我更喜欢直接使用 HttpWebRequest 等。
回答by Eclipse
Use the WebRequest.Create()and set the Methodproperty.
使用WebRequest.Create()和 设置Method属性。
回答by John T
HttpWebRequest HttpWReq =
(HttpWebRequest)WebRequest.Create("http://www.google.com");
HttpWebResponse HttpWResp = (HttpWebResponse)HttpWReq.GetResponse();
Console.WriteLine(HttpWResp.StatusCode);
HttpWResp.Close();
Should print "OK" (200) if the request was successful
如果请求成功，应该打印“OK”（200）
回答by Joel Coehoorn
Also System.Net.WebClient
还 System.Net.WebClient
回答by David
This is code from a small app I wrote once to post a form with values to a URL. It should be pretty robust.
这是我曾经写过的一个小应用程序的代码，用于将带有值的表单发布到 URL。它应该非常健壮。
_formValues is a Dictionary<string,string> containing the variables to post and their values.
_formValues 是一个包含要发布的变量及其值的 Dictionary<string,string>。
// encode form data
StringBuilder postString = new StringBuilder();
bool first=true;
foreach (KeyValuePair pair in _formValues)
{
if(first)
first=false;
else
postString.Append("&");
postString.AppendFormat("{0}={1}", pair.Key, System.Web.HttpUtility.UrlEncode(pair.Value));
}
ASCIIEncoding ascii = new ASCIIEncoding();
byte[] postBytes = ascii.GetBytes(postString.ToString());
// set up request object
HttpWebRequest request;
try
{
request = WebRequest.Create(url) as HttpWebRequest;
}
catch (UriFormatException)
{
request = null;
}
if (request == null)
throw new ApplicationException("Invalid URL: " + url);
request.Method = "POST";
request.ContentType = "application/x-www-form-urlencoded";
request.ContentLength = postBytes.Length;
// add post data to request
Stream postStream = request.GetRequestStream();
postStream.Write(postBytes, 0, postBytes.Length);
postStream.Close();
HttpWebResponse response = request.GetResponse() as HttpWebResponse;
回答by Christian Ernst Rysgaard
Im using the following piece of code for calling webservices using the httpwebrequest class:
我使用以下代码段使用 httpwebrequest 类调用 web 服务：
internal static string CallWebServiceDetail(string url, string soapbody,
int timeout) {
return CallWebServiceDetail(url, soapbody, null, null, null, null,
null, timeout);
}
internal static string CallWebServiceDetail(string url, string soapbody,
string proxy, string contenttype, string method, string action,
string accept, int timeoutMilisecs) {
var req = (HttpWebRequest) WebRequest.Create(url);
if (action != null) {
req.Headers.Add("SOAPAction", action);
}
req.ContentType = contenttype ?? "text/xml;charset=\"utf-8\"";
req.Accept = accept ?? "text/xml";
req.Method = method ?? "POST";
req.Timeout = timeoutMilisecs;
if (proxy != null) {
req.Proxy = new WebProxy(proxy, true);
}
using(var stm = req.GetRequestStream()) {
XmlDocument doc = new XmlDocument();
doc.LoadXml(soapbody);
doc.Save(stm);
}
using(var resp = req.GetResponse()) {
using(var responseStream = resp.GetResponseStream()) {
using(var reader = new StreamReader(responseStream)) {
return reader.ReadToEnd();
}
}
}
}
This can be easily used to call a webservice
这可以很容易地用于调用网络服务
public void TestWebCall() {
const string url =
"http://www.ecubicle.net/whois_service.asmx/HelloWorld";
const string soap =
@"<soap:Envelope xmlns:soap='about:envelope'>
<soap:Body><HelloWorld /></soap:Body>
</soap:Envelope>";
string responseDoc = CallWebServiceDetail(url, soap, 1000);
XmlDocument doc = new XmlDocument();
doc.LoadXml(responseDoc);
string response = doc.DocumentElement.InnerText;
}
回答by Rebol Tutorial
The problem when beginning with high-level language like C#, Java or PHP is that people may have never known how simple the underground is in reality. So here's a short introduction:
当开始使用 C#、Java 或 PHP 等高级语言时，问题在于人们可能永远不知道地下实际上是多么简单。所以这里有一个简短的介绍：
![C# 将字符串转换为其 byte[] 等效项](/res/img/loading.gif)