Read the HTTP POST request of HttpWebRequest

Question

I need to create Http POST requests and maybe a few GET requests as strings for some tests I am writing. Currently, my tests build them using a StringBuilder and hardcoded POST requests pulled out from fiddler kinda like this:

var builder = new StringBuilder(); builder.Append("POST https://some.web.pg HTTP/1.1\r\n"); builder.Append("Content-Type: application/x-www-form-urlencoded\r\n"); builder.Append("Referer: https://some.referer.com\r\n"); builder.Append("Accept-Language: en-us\r\n"); builder.Append("Accept-Encoding: gzip, deflate\r\n"); builder.Append("User-Agent: Mozilla/5.0 (compatible; MSIE 9.0; Windows NT 6.1; WOW64; Trident/5.0)\r\n"); builder.Append("Host: login.yahoo.com\r\n"); // ... other header info builder.Append("\r\n"); builder.Append("post body......\r\n"); var postData = builder.ToString();

This is quickly making my tests messy and would prefer to have a cleaner way to build these POST requests. I've been looking into HttpWebRequest class hoping that maybe it can create these for me. I figured that behind the sences it must have some way to construct this exact request I am trying to creating in some form or another. But alas, the GetRequestStream is a writable only stream.

Is there a way to read the request stream HttpWebRequest will generate (and then change it to a string)? Or even any ideas on how to generate these POST requests would do.

Community · Accepted Answer · 2017-05-23 12:02:29Z

here an msdn sample to make a Get request:

using System;

using System.Net; using System.IO;

namespace MakeAGETRequest_charp { /// /// Summary description for Class1. /// class Class1 { static void Main(string[] args) { string sURL; sURL = "http://www.microsoft.com";

 WebRequest wrGETURL; wrGETURL = WebRequest.Create(sURL); WebProxy myProxy = new WebProxy("myproxy",80); myProxy.BypassProxyOnLocal = true; wrGETURL.Proxy = WebProxy.GetDefaultProxy(); Stream objStream; objStream = wrGETURL.GetResponse().GetResponseStream(); StreamReader objReader = new StreamReader(objStream); string sLine = ""; int i = 0; while (sLine!=null) { i++; sLine = objReader.ReadLine(); if (sLine!=null) Console.WriteLine("{0}:{1}",i,sLine); } Console.ReadLine(); } }

} and here an for post request (from HTTP request with post)

 HttpWebRequest httpWReq = (HttpWebRequest)WebRequest.Create("http:\\domain.com\page.asp"); ASCIIEncoding encoding = new ASCIIEncoding(); string postData = "username=user"; postData += "&password=pass"; byte[] data = encoding.GetBytes(postData); httpWReq.Method = "POST"; httpWReq.ContentType = "application/x-www-form-urlencoded"; httpWReq.ContentLength = data.Length; using (Stream newStream = httpWReq.GetRequestStream()) { newStream.Write(data,0,data.Length); }

Community · Accepted Answer · 2017-05-23 12:02:29Z

I advise you to use mocking because it is a best practice on unit test: see this answer on stack Unit testing HTTP requests in c#

Krunal Mevada · Accepted Answer · 2012-08-04 05:32:33Z

 HttpWebRequest req = (HttpWebRequest)WebRequest.Create(yoururllink); var c = HttpContext.Current; //Set values for the request back req.Method = "POST"; req.ContentType = "application/x-www-form-urlencoded"; byte[] param = Request.BinaryRead(HttpContext.Current.Request.ContentLength); string strRequest = Encoding.ASCII.GetString(param); string strResponse_copy = strRequest; //Save a copy of the initial info sent from your url link strRequest += "&cmd=_notify-validate"; req.ContentLength = strRequest.Length; //for proxy //WebProxy proxy = new WebProxy(new Uri("http://url:port#")); //req.Proxy = proxy; //Send the request to PayPal and get the response StreamWriter streamOut = new StreamWriter(req.GetRequestStream(), System.Text.Encoding.ASCII); streamOut.Write(strRequest); streamOut.Close(); StreamReader streamIn = new StreamReader(req.GetResponse().GetResponseStream()); string strResponse = streamIn.ReadToEnd(); streamIn.Close();

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