Develop Reference

How can i get cookies in web request using c#?

I'm new to c# language. I want to write this code to post data to web url:
byte[] data = Encoding.ASCII.GetBytes($"Identifier={"anyUsername"}&Password={"Password"}");
WebRequest request = WebRequest.Create("http://users.tclnet.ir/Authentication/LogOn");
request.Method = "POST";
request.ContentType = "application/x-www-form-urlencoded";
request.ContentLength = data.Length;
using (Stream stream = request.GetRequestStream())
{
stream.Write(data, 0, data.Length);
}
string responseContent = null;
using (WebResponse response = request.GetResponse())
{
using (Stream stream = response.GetResponseStream())
{
using (StreamReader sr99 = new StreamReader(stream))
{
responseContent = sr99.ReadToEnd();
}
}
}
but i want get cookies from that answer,how can i write code to achieve it?

HttpWebRequest GET returns 'No Content' after successful POST

I'm working on an app that makes a POST to a REST API that returns a URI in its response. I then am to make a GET request to that URI and it is supposed to return HTML content in the response body. However, the GET request returns 'No Content' in its HTTP Status Code.
What's strange is, I have a small console app I built for testing purposes that if I plug the URI into it (allows me to test the GET without making the POST), the status good is 200 - OK and I receive the HTML content in the body. So it seems it is related to something I'm doing in my POST request. Here is my code (sensitive info has been redacted):
private PersonReportResults POSTReportRequest(PersonReportRequest reportRequest)
{
var personReportResults = new PersonReportResults();
HttpWebRequest request = (HttpWebRequest)WebRequest.Create("https://xxxxxxxxx.com/api/v1/personReport/reportResults");
var xDoc = new XmlDocument();
var serializedXml = Serialize(reportRequest);
xDoc.LoadXml(serializedXml);
var bytes = Encoding.ASCII.GetBytes(xDoc.OuterXml);
request.ContentType = "application/xml; encoding='utf-8'";
request.ContentLength = bytes.Length;
request.Method = "POST";
request.KeepAlive = true;
request.Credentials = new NetworkCredential(ConfigurationManager.AppSettings["XXXXXUserId"], ConfigurationManager.AppSettings["XXXXXPassword"]);
request.ClientCertificates.Add(GetClientCertificate());
Stream requestStream = request.GetRequestStream();
requestStream.Write(bytes, 0, bytes.Length);
requestStream.Close();
using (var response = (HttpWebResponse)request.GetResponse())
{
if (response.StatusCode == HttpStatusCode.OK)
{
var responseStream = response.GetResponseStream();
using (MemoryStream ms = new MemoryStream())
{
var count = 0;
do
{
byte[] buf = new byte[1024];
count = responseStream.Read(buf, 0, 1024);
ms.Write(buf, 0, count);
} while (responseStream.CanRead && count > 0);
ms.Position = 0;
// now attempt to desrialize from the memory stream
var serializer = new XmlSerializer(typeof(PersonReportResults));
personReportResults = ((PersonReportResults)serializer.Deserialize(ms));
}
response.Close();
}
request.Abort();
}
return personReportResults;
}
/// <summary>
/// Makes a HTTP GET request for the report HTML
/// </summary>
/// <param name="uri">The URI.</param>
/// <returns>string</returns>
private static string GETResults(string uri)
{
var responseHTML = string.Empty;
HttpWebRequest request = (HttpWebRequest)WebRequest.Create(uri + "?reportType=html");
//request.ContentType = "application/xml; encoding='utf-8'";
request.Method = "GET";
request.Credentials = new NetworkCredential(ConfigurationManager.AppSettings["XXXXXUserId"], ConfigurationManager.AppSettings["XXXXXPassword"]);
request.ClientCertificates.Add(GetClientCertificate());
using (var response = (HttpWebResponse)request.GetResponse())
{
if (response.StatusCode == HttpStatusCode.OK)
{
try
{
using (var stream = response.GetResponseStream())
{
if (stream != null)
{
using (MemoryStream ms = new MemoryStream())
{
var count = 0;
do
{
byte[] buf = new byte[1024];
count = stream.Read(buf, 0, 1024);
ms.Write(buf, 0, count);
} while (stream.CanRead && count > 0);
ms.Position = 0;
var sr = new StreamReader(ms);
responseHTML = sr.ReadToEnd();
}
//var reader = new StreamReader(stream, Encoding.UTF8);
//responseHTML = reader.ReadToEnd();
}
}
}
catch (Exception e)
{
}
request.Abort();
}
else if (response.StatusCode == HttpStatusCode.Accepted)
{
response.Close();
var tryCount = 1;
while (tryCount < 5)
{
using (var retryResponse = (HttpWebResponse)request.GetResponse())
{
if (retryResponse.StatusCode == HttpStatusCode.OK)
{
using (var stream = retryResponse.GetResponseStream())
{
if (stream != null)
{
var reader = new StreamReader(stream, Encoding.UTF8);
responseHTML = reader.ReadToEnd();
}
}
}
}
tryCount++;
Thread.Sleep(10000);
}
}
}
return responseHTML;
}

How can i post a request with parameter from C#.net

I want to post a request on server using POST and webrequest?
I need to pass parameters as well while posting?
how can i pass the parameters while posting?
How can i do that???
Sample code...
string requestBody = string.Empty;
WebRequest request = WebRequest.Create("myursl");
request.ContentType = "application/x-www-form-urlencoded";
request.Method = "POST";
//request.ContentLength = byte sXML.Length;
//System.IO.StreamWriter sw = new System.IO.StreamWriter(request.GetRequestStream());
//sw.Write(sXML);
//sw.Close();
HttpWebResponse res = (HttpWebResponse)request.GetResponse();
if (res != null)
{
using (StreamReader sr = new StreamReader(res.GetResponseStream(), true))
{
ReturnBody = sr.ReadToEnd();
StringBuilder s = new StringBuilder();
s.Append(ReturnBody);
sr.Close();
}
}
if (ReturnBody != null)
{
if (res.StatusCode == HttpStatusCode.OK)
{
//deserialize code for xml and get the output here
string s =ReturnBody;
}
}

NameValueCollection keyValues = new NameValueCollection();
keyValues["key1"] = "value1";
keyValues["key2"] = "value2";
using (var wc = new WebClient())
{
byte[] result = wc.UploadValues(url,keyValues);
}

you can try with this code
string parameters = "sample=<value>&other=<value>";
byte[] stream= Encoding.UTF8.GetBytes(parameters);
request.ContentLength = stream.Length;
Stream newStream=webRequest.GetRequestStream();
newStream.Write(stream,0,stream.Length);
newStream.Close();
WebResponse webResponse = request.GetResponse();

Get real-time data from a http long lived web service

I have a http long lived web service. If it has new data it will push to client using http GET. How can I receive real-time data from http long lived web service with HttpWebRequest c#?

If you wanted to get data using Get, you can use this (the response is synchronous when you use GetResponse):
public string GetMessageViaGet(string endPoint)
{
HttpWebRequest request = CreateWebRequest(endPoint);
using (var response = (HttpWebResponse)request.GetResponse())
{
var responseValue = string.Empty;
if (response.StatusCode != HttpStatusCode.OK)
{
string message = String.Format("Request failed. Received HTTP {0}", response.StatusCode);
throw new ApplicationException(message);
}
// grab the response
using (var responseStream = response.GetResponseStream())
{
using (var reader = new StreamReader(responseStream))
{
responseValue = reader.ReadToEnd();
}
}
return responseValue;
}
}
private HttpWebRequest CreateWebRequest(string endPoint)
{
var request = (HttpWebRequest)WebRequest.Create(endPoint);
request.Method = "GET";
request.ContentLength = 0;
request.ContentType = "text/xml";
return request;
}

If you want to get data via post, do this
public string GetMessageViaPost(string endPoint, string paramtersJson)
{
string responseValue;
byte[] bytes = Encoding.UTF8.GetBytes(paramtersJson);
HttpWebRequest request = CreateWebRequest(endPoint, bytes.Length);
using (var requestStream = request.GetRequestStream())
{
requestStream.Write(bytes, 0, bytes.Length);
}
using (var response = (HttpWebResponse)request.GetResponse())
{
if (response.StatusCode != HttpStatusCode.OK)
{
string message = String.Format("POST failed. Received HTTP {0}", response.StatusCode);
throw new ApplicationException(message);
}
// grab the response
using (var responseStream = response.GetResponseStream())
{
using (var reader = new StreamReader(responseStream))
{
responseValue = reader.ReadToEnd();
}
}
}
return responseValue;
}
private HttpWebRequest CreateWebRequest(string endPoint, Int32 contentLength)
{
var request = (HttpWebRequest)WebRequest.Create(endPoint);
request.Method = "POST";
request.ContentLength = contentLength;
request.ContentType = "application/json";// "application/x-www-form-urlencoded";
return request;
}

How to get value back from a web services in C#?

I am sending a URL and XML to a webservices, so that it will return me JSON about the result. I am here posting the request to the webservices how do I get the value from the webservices back. The value returned by the webservices is JSON. What should be the return type here and what should be returned to get the HTTP response status and body
public string HttpPostcredentials(string XML, string url)
{
try
{
HttpWebRequest req = WebRequest.Create(new Uri(url)) as HttpWebRequest;
req.Method = "POST";
byte[] buffer = Encoding.ASCII.GetBytes(XML);
req.ContentLength = buffer.Length;
req.ContentType = "application/xml";
Stream PostData = req.GetRequestStream();
PostData.Write(buffer, 0, buffer.Length);
PostData.Close();
}
catch (Exception e)
{
}
return null;
}

Is this what you are looking for:
var request = WebRequest.Create(string.Concat(serviceUrl, resourceUrl)) as HttpWebRequest;
if (request != null)
{
request.ContentType = "application/xml";
request.Method = "POST";
}
byte[] requestBodyBytes = Encoding.ASCII.GetBytes(XML);
request.ContentLength = requestBodyBytes.Length;
using (Stream postStream = request.GetRequestStream())
postStream.Write(requestBodyBytes, 0, requestBodyBytes.Length);
if (request != null)
{
var response = request.GetResponse() as HttpWebResponse;
if(response.StatusCode == HttpStatusCode.OK)
{
Stream responseStream = response.GetResponseStream();
if (responseStream != null)
{
var reader = new StreamReader(responseStream);
responseMessage = reader.ReadToEnd();
}
}
else
{
responseMessage = response.StatusDescription;
}
}

You need to get the Response from the HttpWebRequest
WebResponse result = req.GetResponse();