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HttpWebRequest from a local WCF service

I am doing some testing for a Xamarin Android app with a simple local WCF service to prove my connection code works.
Service:
[OperationContract]
string Ping();
…
public string Ping()
{
return "Pong";
}
Test Code in Xamarin App:
var request = HttpWebRequest.Create(string.Format(#"http://192.168.1.175/_Services/TestService1.svc/Ping"));
request.Credentials = CredentialCache.DefaultCredentials;
request.ContentType = "application/x-www-form-urlencoded;charset=UTF-8";
request.ContentLength = 0; //pass.Length;
request.Method = "POST";
using (HttpWebResponse response = request.GetResponse() as HttpWebResponse) //Errors out here
{
using (StreamReader reader = new StreamReader(response.GetResponseStream()))
{
var content = reader.ReadToEnd();
Console.Out.WriteLine("Response Body: \r\n {0}", content);
}
}
Error:
The remote server returned an error: (400) Bad Request.
Edit:
When using ServiceReference, the following works:
private void button3_Click(object sender, EventArgs e)
{
ServiceReference1.TestService1Client client = new ServiceReference1.TestService1Client();
string returnString;
returnString = client.Ping();
label1.Text = returnString;
}
Slightly different code still does not work:
private void button4_Click(object sender, EventArgs e)
{
//string serviceUrl = "http://192.168.1.175/_Services/TestService1.svc";
string serviceUrl = "http://localhost/_Services/TestService1.svc";
HttpWebRequest httpRequest = (HttpWebRequest)WebRequest.Create(new Uri(serviceUrl + "/Ping"));
httpRequest.Accept = "text/xml";
httpRequest.ContentType = "text/xml";
httpRequest.Method = "POST";
httpRequest.ContentLength = 0;
httpRequest.KeepAlive = false;
using (HttpWebResponse httpResponse = (HttpWebResponse)httpRequest.GetResponse()) //400 Bad Request
{
using (Stream stream = httpResponse.GetResponseStream())
{
label1.Text = (new StreamReader(stream)).ReadToEnd();
}
}
}

The answer was rooted in System.ServiceModel.Activation.WebServiceHostFactory
For some reason none of my sources mentioned this during research for using HttpWebRequest.
I found the reference by chance when looking at Android WCF consuming.
https://minafayek.wordpress.com/2013/04/02/consuming-iis-published-restful-wcf-service-from-android-over-wifi/
I got my testing programs working so, I should be able to move forward.

HTTPWebRequest and "X_Session"?

I am new to interacting with a webpage in C#. I have come across a problem where a server returns a 401 unauthorized access exception, even though I provided correct credentials. I have traced the source of my problem to something called an "X_Session" as in below:
How would I generate one of these?
The code I currently have is:
private void snd_Click(object sender, EventArgs e)
{
string pnum = number.Text;
string msg = text.Text;
StringBuilder postData = new StringBuilder();
postData.Append("%7B%22contact_value%22%3A%22" + pnum + "%22%2C");
postData.Append("%22contact_type%22%3A2%2C");
postData.Append("%22message%22%3A%22" + msg + "%22%2C");
postData.Append("%22read%22%3A1%2C");
postData.Append("%22message_direction%22%3A2%2C");
postData.Append("%22message_type%22%3A1%2C");
postData.Append("%22date%22%3A%22Sat+Nov+30+2013+13%3A20%3A44+GMT-0800+(Pacific+Standard+Time)%22%2C");
postData.Append("%22from_name%22%3A%22[redacted name]%22%7D");
UTF8Encoding encoding = new UTF8Encoding();
byte[] byData = encoding.GetBytes(postData.ToString());
HttpWebRequest req = (HttpWebRequest)WebRequest.Create(new Uri("https://www.textnow.com/api/users/[redacted username]/messages"));
WebResponse response = null;
req.ProtocolVersion = HttpVersion.Version11;
System.Net.NetworkCredential netCredential =
new System.Net.NetworkCredential("[redacted username]", "[redacted password]");
req.Credentials = netCredential;
req.PreAuthenticate = true;
req.KeepAlive = true;
req.Method = "OPTIONS";
req.Host = "www.textnow.com";
req.Accept = "*/*";
req.Headers.Add("Accept-Encoding", "gzip,deflate,sdch");
req.Headers.Add("Accept-Language", "en-US,en;q=0.8");
req.Headers.Add("Access-Control-Request-Headers","accept, origin, x_session, content-type");
req.Headers.Add("Access-Control-Request-Method","POST");
response = (HttpWebResponse)req.GetResponse();
HttpWebRequest mreq = (HttpWebRequest)WebRequest.Create(new Uri("https://www.textnow.com/api/users/csharpautomaton/messages"));
mreq.Method = "POST";
mreq.Host = "www.textnow.com";
mreq.ProtocolVersion = HttpVersion.Version11;
mreq.Accept = "application/json, text/javascript, */*; q=0.01";
mreq.Headers.Add("Accept-Encoding","gzip,deflate,sdch");
mreq.Headers.Add("Accept-Language", "en-US,en;q=0.8");
mreq.UserAgent = "Mozilla/5.0 (Windows; U; Windows NT 6.1; en-US; rv:1.9.2.13) Gecko/20101203 Firefox/3.6.13";
mreq.Credentials = netCredential;
mreq.ContentType = "application/x-www-form-urlencoded; charset=UTF-8";
mreq.Referer = "https://www.textnow.com/api/users/[redacted username]/messages";
mreq.AllowAutoRedirect = true;
mreq.KeepAlive = true;
mreq.ContentType = "application/x-www-form-urlencoded; charset=UTF-8";
Stream sw = mreq.GetRequestStream();
sw.Write(byData,0,byData.Length);
sw.Close();
response = (HttpWebResponse)mreq.GetResponse();
}

Who created the X_session value in the sample you posted?
Whoever created that value will know what the rules are for creating it.
It was probably setup on some prior request and saved for later use.

Calling web service method in Windows Phone 8 App

I have a web service hosted on a service that is interacting SQL Server.
I have to develop a windows phone 8 app that should interact with that web service for fetching data from server.
I m using webclient but getting the response :the remote server returned an error notfound ".
I don't know how to call a method..
And which one is better
HTTPClient
Webclient
or any other method

public ConstructoreName()
{
InitializeComponent();
ServiceReferenceCustomer.OfferhutCustomerClient ohCustomer = new ServiceReferenceCustomer.OfferhutCustomerClient();
ohCustomer.getOfferAsync(3); //here getOffer is a method and 3 is a parameter
ohCustomer.getOfferCompleted += new EventHandler<getOfferCompletedEventArgs>(getOffer_completed);
}
void getOffer_completed(object sender, getOfferCompletedEventArgs e)
{
ServiceReferenceCustomer.offer res;
res = e.Result;
offerTitle.Text = res.title;
offerFirstPara.Text = res.shopName + " \n" + res.title + " \n" + res.date;
offerSecendPara.Text = res.description;
}
I think this is help for you..

I think this should be help you:
private void Button_Click_1(object sender, RoutedEventArgs e)
{
// Create a new HttpWebRequest object.
HttpWebRequest request = (HttpWebRequest)WebRequest.Create("http://www.example.com/webservicelogin/webservice.asmx/ReadTotalOutstandingInvoice");
request.ContentType = "application/x-www-form-urlencoded";
request.UserAgent = "Mozilla/5.0 (compatible; MSIE 10.0; Windows NT 6.2; WOW64; Trident/6.0; Touch)";
request.CookieContainer = cookie;
// Set the Method property to 'POST' to post data to the URI.
request.Method = "POST";
// start the asynchronous operation
request.BeginGetRequestStream(new AsyncCallback(GetRequestStreamCallback), request);
}
private void GetRequestStreamCallback(IAsyncResult asynchronousResult)
{
HttpWebRequest request = (HttpWebRequest)asynchronousResult.AsyncState;
// End the operation
Stream postStream = request.EndGetRequestStream(asynchronousResult);
//postData value
string postData = "xxxxxxxxxx";
// Convert the string into a byte array.
byte[] byteArray = Encoding.UTF8.GetBytes(postData);
// Write to the request stream.
postStream.Write(byteArray, 0, postData.Length);
postStream.Close();
// Start the asynchronous operation to get the response
request.BeginGetResponse(new AsyncCallback(GetResponseCallback), request);
}
private void GetResponseCallback(IAsyncResult asynchronousResult)
{
HttpWebRequest request = (HttpWebRequest)asynchronousResult.AsyncState;
// End the operation
HttpWebResponse response = (HttpWebResponse)request.EndGetResponse(asynchronousResult);
Stream streamResponse = response.GetResponseStream();
StreamReader streamRead = new StreamReader(streamResponse);
string read = streamRead.ReadToEnd();
//respond from httpRequest
TextBox.Text = read;
// Close the stream object
streamResponse.Close();
streamRead.Close();
response.Close();
}

Send post to java servlet using C# HttpWebRequest

I have task of uploading file to java servlet. I installed Fiddler to see where web requests are sent and what post data is sent. After logging into java servlet using HttpWebRequest GET method I receive in cookies SessionId. So I was using this SessionId in headers to create POST request to the web server where servlet is. But in response I receive message that "session is time out. Try to login again." But if I use application through user interface I have the one SessionId for all application which is sent in headers with each request.
This application is running in bank so I was thinking if they have some security against scraping.
Am I thinking in a right way? Any help will be appreciated.
Thanks, Elena
Here is my code
CookieContainer cookieContainer = new CookieContainer();
HttpWebRequest req = (HttpWebRequest)WebRequest.Create("http://go.tkygw.pcnet.smbc.local/MgbTokyoGateway/Mgblinkmenu.aspx");
req.Credentials = new NetworkCredential("GB54326", "elena83", "TKYGW");
req.CookieContainer = cookieContainer;
req.Headers.Add("Pragma", "no-cache");
req.Headers.Add("Accept-Language", "en-gb");
req.ProtocolVersion = HttpVersion.Version10;
req.AllowAutoRedirect = true;
WebResponse resp = req.GetResponse();
//here in cookies I receive ASP.NET_session_Id and tkygw_intra
HttpWebResponse webr = (HttpWebResponse)resp;
StreamReader r = new StreamReader(resp.GetResponseStream(), System.Text.Encoding.UTF8);
string res = r.ReadToEnd();
resp.Close();
NameValueCollection nvc = new NameValueCollection();
nvc.Add("_PAGEID", "MWMAL1000P00");
nvc.Add("_SENDTS", "1296208904759");
nvc.Add("_TRANID", "AL1000T00P01");
nvc.Add("_SUBINDEX", "-1");
nvc.Add("_TARGET", "");
nvc.Add("_FRAMID", "");
nvc.Add("_LUID", "1296208904720");
nvc.Add("_WINID", "root");
nvc.Add("_TARGETWINID", "TIMEOUTW_300000_13");
nvc.Add("CHK_FLG", "0");
nvc.Add("BUTTON_NAME", "Corporate Card");
nvc.Add("TITLE_NAME", "[AL1000]Main Menu");
nvc.Add("DateFormat", "1");
nvc.Add("BIZKEY", "AC");
nvc.Add("H_REG_NUM", "");
nvc.Add("H_TODO_DISP_MODE", "");
nvc.Add("H_VIEW_CHANGE_FLG", "1");
nvc.Add("H_SMVA_FLG", "0");
nvc.Add("H_SWITCH_ID", "8837");
nvc.Add("T_BOOKING", "8802");
nvc.Add("T_CUSTOMER_ID", "109732");
nvc.Add("P_DATE_FM", "1");
nvc.Add("D_BA_CREDIT_MONITORING_DISABLED", "");
nvc.Add("D_BA_CREDIT_APPLICATION_DISABLED", "");
nvc.Add("D_BA_CREDIT_APPLICATION_DISABLED", "");
nvc.Add("P_BLANKET_APPLI", "");
HttpWebRequest req3 = (HttpWebRequest)WebRequest.Create("http://gcm.tkygw.pcnet.smbc.local/gcmv0/WACSServlet");
//here in cookiesContainer are 4 values: ASP.NET_session_Id , tkygw_intra
req3.CookieContainer = cookieContainer;
req3.Method = "POST";
req3.Accept = "*/*";
// req3.Headers.Add("Pragma", "no-cache");
// req3.Headers.Add("Accept-Language", "en-gb");
req3.AllowAutoRedirect = true;
req3.KeepAlive = true;
req3.UserAgent = "Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1; SV1; .NET CLR 1.1.4322; .NET CLR 2.0.50727; .NET CLR 3.0.4506.2152; .NET CLR 3.5.30729)";
req3.ContentType = "application/x-www-form-urlencoded";
req3.ProtocolVersion = HttpVersion.Version10;
var sbPostData = new StringBuilder();
if (nvc != null)
{
foreach (string key in nvc.AllKeys)
{
string[] values = nvc.GetValues(key);
if (values != null)
{
foreach (string value in values)
{
if (!string.IsNullOrEmpty(value))
sbPostData.Append(string.Format("{0}={1}&", HttpUtility.UrlEncode(key), HttpUtility.UrlEncode(value)));
}
}
}
}
var parameterString = Encoding.UTF8.GetBytes(sbPostData.ToString());
req3.Referer = "http://gcm.tkygw.pcnet.smbc.local/gcmv0/WACSServlet?_TRANID=AL0010P01C01";
req3.ContentLength = sbPostData.ToString().Length;
using (Stream requestStream = req3.GetRequestStream())
{
requestStream.Write(parameterString, 0, parameterString.Length);
requestStream.Close();
//nothig is received in cookies. Status of response 200 (OK), but on the web page is error that Session is Time OUT. Please Login again
using (var response = req3.GetResponse() as HttpWebResponse)
{
using (var stIn = new System.IO.StreamReader(response.GetResponseStream()))
{
//here I receive session Time Out. Please login again
string s = stIn.ReadToEnd();
}
}
}

If you are uploading file using HttpWebRequest, you must specify content headers correct.
Content must be specified as Content-Type: multipart/form-data
sample snippet
string DataBoundary = "-----------------------------" + DateTime.Now.Ticks.ToString("x");
string contentType = "multipart/form-data; boundary=" + DataBoundary ;
req.Method = "POST";
req.ContentType = contentType ;
req.UserAgent = userAgent;
req.CookieContainer = new CookieContainer();
req.ContentLength = formData.Length;
Check out this and this posts for more detail explanation

C# WebRequest Login Session

Okay I tried asking this question yesterday but i'm not sure if I gave enough info, i got an answer but it hasn't worked for me. Basically what i'm doing is the user opens this windows forms application and logs in. Afterwhich they enter some text into a textbox and click run. At this point the run function is making a webrequest to a server that requires a login (the login that is initially done after they open the program. For some reason its still not seeing that the user is logged in when performing the second request even though the cookies are added too a cookie container. I'm not sure what i'm doing wrong but I will post my code so you can further help me.
This is the function that is performed for the login when the user enters the application.
private void button1_Click(object sender, EventArgs e)
{
string paramaters = "authmethod=on&chkRememberMe=on&login-form-type=pwd&password=" + pw.Text + "&userid=" + uid.Text + "&username=" + uid.Text;
string strResponse;
HttpWebRequest requestLogin = (HttpWebRequest)WebRequest.Create("https://www.url.com/login.form");
requestLogin.Method = "POST";
requestLogin.CookieContainer = cookieJar;
requestLogin.ContentType = "application/x-www-form-urlencoded";
requestLogin.ContentLength = paramaters.Length;
StreamWriter stOut = new StreamWriter(requestLogin.GetRequestStream(), System.Text.Encoding.ASCII);
stOut.Write(paramaters);
stOut.Close();
HttpWebResponse responseLogin = (HttpWebResponse)requestLogin.GetResponse();
StreamReader stIn = new StreamReader(responseLogin.GetResponseStream());
strResponse = stIn.ReadToEnd();
stIn.Close();
//Add cookies to CookieJar (Cookie Container)
foreach (Cookie cookie in responseLogin.Cookies)
{
cookieJar.Add(new Cookie(cookie.Name.Trim(), cookie.Value.Trim(), cookie.Path, cookie.Domain));
richTextBox2.Text += cookie.Name.ToString() + Environment.NewLine + cookie.Value.ToString() + Environment.NewLine + cookie.Path.ToString() + Environment.NewLine + cookie.Domain.ToString();
}
if (strResponse.Contains("Log On Successful") || strResponse.Contains("already has a webseal session"))
{
foreach (Control cont in this.Controls)
{
cont.Visible = true;
}
loginPanel.SendToBack();
loginPanel.Visible = false;
}
else
{
MessageBox.Show("Login failed.");
}
}
This is the function that is ran when the user clicks the "run" button to initiate the tests on a consumer account.
private string runTestRequest(Uri url, string parameters)
{
string testResults = string.Empty;
HttpWebRequest runTest = (HttpWebRequest)WebRequest.Create(url);
runTest.CookieContainer = cookieJar;
runTest.Method = "POST";
runTest.ContentType = "application/x-www-form-urlencoded";
StreamWriter stOut = new StreamWriter(runTest.GetRequestStream(), System.Text.Encoding.ASCII);
stOut.Write(parameters);
stOut.Close();
StreamReader stIn = new StreamReader(runTest.GetResponse().GetResponseStream());
testResults = stIn.ReadToEnd();
stIn.Close();
return testResults;
}
And of course this is my cookie container object
public CookieContainer cookieJar = new CookieContainer();
P.S.: The domains of the webrequests are different. First being abc.com 2nd being 123.com The only problem is that the first domain (which is the login) is a global login for internal web applications like 123.com, so how would i use the login session from the 1st domain with the 2nd domain?
Can you please assist in helping me figure out what I am doing wrong.

I found out that what was happening was it was redircting to a subdomain on the same domain as the 2nd (123.com) to use the login. Evidently they had this global login system built on the multiple domains to pass the cookies. The code above DOES work and i do have it working now. Thanks!!

string url = "http://www.ABC/MemberShip/Login.aspx";// HttpContext.Current.Request.Url.AbsoluteUri.ToString().Replace("AutoLogin", "Login");
CookieContainer myCookieContainer = new CookieContainer();
HttpWebRequest request = WebRequest.Create(url) as HttpWebRequest;
request.CookieContainer = myCookieContainer;
request.Method = "GET";
request.KeepAlive = false;
HttpWebResponse response = request.GetResponse() as HttpWebResponse;
System.IO.Stream responseStream = response.GetResponseStream();
System.IO.StreamReader reader = new System.IO.StreamReader(responseStream, Encoding.UTF8);
string srcString = reader.ReadToEnd();
// get the page ViewState
string viewStateFlag = "id=\"__VIEWSTATE\" value=\"";
int i = srcString.IndexOf(viewStateFlag) + viewStateFlag.Length;
int j = srcString.IndexOf("\"", i);
string viewState = srcString.Substring(i, j - i);
// get page EventValidation
string eventValidationFlag = "id=\"__EVENTVALIDATION\" value=\"";
i = srcString.IndexOf(eventValidationFlag) + eventValidationFlag.Length;
j = srcString.IndexOf("\"", i);
string eventValidation = srcString.Substring(i, j - i);
string submitButton = "LoginButton";
// UserName and Password
string userName = "userid";
string password = "password";
// Convert the text into the url encoding string
viewState = System.Web.HttpUtility.UrlEncode(viewState);
eventValidation = System.Web.HttpUtility.UrlEncode(eventValidation);
submitButton = System.Web.HttpUtility.UrlEncode(submitButton);
// Concat the string data which will be submit
string formatString =
"txtUserName={0}&txtPassword={1}&btnSignIn={2}&__VIEWSTATE={3}&__EVENTVALIDATION={4}";
string postString =
string.Format(formatString, userName, password, submitButton, viewState, eventValidation);
// Convert the submit string data into the byte array
byte[] postData = Encoding.ASCII.GetBytes(postString);
// Set the request parameters
request = WebRequest.Create(url) as HttpWebRequest;
request.Method = "POST";
request.Referer = url;
request.KeepAlive = false;
request.UserAgent = "Mozilla/4.0 (compatible; MSIE 8.0; Windows NT 6.1; WOW64; Trident/4.0; SLCC2; .NET CLR 2.0.50727; .NET CLR 3.5.30729; .NET CLR 3.0.30729; Media Center PC 6.0; InfoPath.2; CIBA)";
request.ContentType = "application/x-www-form-urlencoded";
request.CookieContainer = myCookieContainer;
System.Net.Cookie ck = new System.Net.Cookie("TestCookie1", "Value of test cookie");
ck.Domain = request.RequestUri.Host;
request.CookieContainer.Add(ck);
request.CookieContainer.Add(response.Cookies);
request.ContentLength = postData.Length;
// Submit the request data
System.IO.Stream outputStream = request.GetRequestStream();
request.AllowAutoRedirect = true;
outputStream.Write(postData, 0, postData.Length);
outputStream.Close();
// Get the return data
response = request.GetResponse() as HttpWebResponse;
responseStream = response.GetResponseStream();
reader = new System.IO.StreamReader(responseStream, Encoding.UTF8);
srcString = reader.ReadToEnd();
Response.Write(srcString);
Response.End();