什么是送在C＃中使用HttpWebRequest的一个“AJAX”POST请求的正确方法？ [英] What is the correct way to send an 'ajax' post request using httpwebrequest in C#?

问题描述

下面的请求头从萤火虫产生的点击网页上的按钮（网址不会改变，所以它是一个ajax post请求！）。我想重复使用的HttpWebRequest在我的C＃程序申请。

The following request-header is generated from firebug on clicking a button on a webpage(the url doesn't change, so it is an ajax post request!). I would like to replicate this request using httpwebrequest in my C# program.

Accept :text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8
Accept-Encoding   :gzip, deflate
Accept-Language :en-US,en;q=0.5
Cache-Control   :no-cache
Connection  :keep-alive
Content-Length  :725
Content-Type    :application/x-www-form-urlencoded;charset=UTF-8
Cookie  :language=en_IN; _ga=GA1.3.184236920.1443720063;__gads=ID=9a55686039c6e6f0:T=1443720047:S=ALNI_MaWPaHUEUBgf-Zf7qdtCfl0jdtTcQ; JSESSIONID=nnMsc6NkqzXSgHXQ0DaNuHLwMl0OLChvEiv2hxBtunG22tmF_rTB!-30889781; SLB_Cookie=ffffffff09461c2745525d5f4f58455e445a4a422972; _gat_UA-57718223-1=1; _gat_UA-57718223-3=1
Faces-Request   :partial/ajax
Host    :www.example.com
Pragma  :no-cache
Referer :https://www.example.com/photography/homepage.jsf
User-Agent  :Mozilla/5.0 (Windows NT 10.0; WOW64; rv:40.0) Gecko/20100101 Firefox/40.0

这是我试过到目前为止，但它导致错误412服务器。我已经确定了post_data字符串是正确的，但它仍然是行不通的。

This is what I have tried so far but it results in Error 412 from the server. I have made sure that the post_data string is correct, but still it isn't working.

string post_data= "inputexForm=inputexForm&cat=senior&inputexForm%3aid=4174622&...addtab&AJAX%3AEVENTS_COUNT=1&javax.faces.partial.ajax=true";
httpWebRequest = (HttpWebRequest)WebRequest.Create("https://www.example.com/photography/homepage.jsf");
httpWebRequest.CookieContainer = cookieJar;
httpWebRequest.Referer = "https://www.example.com/photography/homepage.jsf";
httpWebRequest.Method = "POST";
httpWebRequest.ContentType = "application/x-www-form-urlencoded;charset=UTF-8";
httpWebRequest.UserAgent = "Mozilla/5.0 (Windows NT 10.0; WOW64; rv:40.0) Gecko/20100101 Firefox/40.0";
httpWebRequest.Accept = "text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8";
httpWebRequest.KeepAlive = true;
httpWebRequest.Connection = "keepalive";
byte[] data = UTF8Encoding.UTF8.GetBytes(post_data);
httpWebRequest.ContentLength = data.Length;
using (var stream = httpWebRequest.GetRequestStream())
{
     stream.Write(data, 0, data.Length);
     stream.Close();
}
HttpWebResponse resp = (HttpWebResponse)httpWebRequest.GetResponse();
webBrowser1.DocumentText = resp.ToString();

我

如何发送这个AJAX POST请求到服务器在C＃中使用HttpWebRequest的？

How can I send this ajax post request to the server using HttpWebRequest in C#?

推荐答案

要检测一个请求是AJAX，服务器会检查是否存在一个标头键X-要求，随着中值为XMLHtt prequest。所以，你可以使用 HttpWebRequest.Headers 属性添加此键值对您的请求头：

To detect if a request is ajax, a server checks existence of a header key "X-Requested-With" with value "XMLHttpRequest". So you can add this key-value pair to your request header using HttpWebRequest.Headers property:

var request = (HttpWebRequest)WebRequest.Create("target url");
request.Headers.Add("X-Requested-With", "XMLHttpRequest");

这篇关于什么是送在C＃中使用HttpWebRequest的一个“AJAX”POST请求的正确方法？的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！