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How to send HttpwebRequest request payload

I have a webRequest to create. So I am using (httpwebrequest)webrequest.Create("/get").
I need to send some payload/request body to this request.
But stream writer only seems to work with POST request.
How do I achieve that?

You should not attempt to use a get request to post data to a server. Instead, you should use a post request to accomplish this. It is highly recommended that you do not use a webrequest and instead use HttpClient but if for some reason you absolutely must use webrequest like if you're working with legacy code this is the basic method of accomplishing this:
try
{
WebRequest request = WebRequest.Create("http://www.server.example/api/example");
request.Method = "POST";
byte[] package = Encoding.UTF8.GetBytes("package string example");
request.ContentType = "application/x-www-form-urlencoded";
request.ContentLength = package.Length;
Stream dataStream = request.GetRequestStream();
dataStream.Write(package, 0, package.Length);
dataStream.Close();
WebResponse response = request.GetResponse();
using (dataStream = response.GetResponseStream())
{
StreamReader reader = new StreamReader(dataStream);
string responseFromServer = reader.ReadToEnd();
//do something with the data retrieved from the server
}
response.Close();
}
catch (Exception ex)
{
//example catch
}

Google OAuth2 Bad Request

I am trying to write a YouTube app for windows phone, and I stumbled upon some problems on the authentication side. For some reason the following code is not working properly,
string url = "https://accounts.google.com/o/oauth2/token?";
string postData = "code=" + str + "&client_id=*********.apps.googleusercontent.com&client_secret=*******&grant_type=authorization_code";
HttpWebRequest httpWReq = (HttpWebRequest)WebRequest.Create(url);
byte[] data = Encoding.Unicode.GetBytes(postData);
httpWReq.Method = "POST";
httpWReq.ContentType = "application/x-www-form-urlencoded";
using (Stream stream =await httpWReq.GetRequestStreamAsync())
stream.Write(data, 0, data.Length);
HttpWebResponse response =(HttpWebResponse)(await httpWReq.GetResponseAsync());
string responseString = new StreamReader(response.GetResponseStream()).ReadToEnd();
I am fairly new to HttpWebRequest so probably I missed something, although I am getting a response:
Bad Request
To be specific it says that grant_type is missing although I am pretty sure that it is not, I did everything according to the documentation. What am I doing wrong ?

This will probably fix it
parameters.Append("code=" + str);
parameters.Append("&client_id=*****.apps.googleusercontent.com");
parameters.Append("&client_secret=*****");
parameters.Append("&redirect_uri=urn:ietf:wg:oauth:2.0:oob:auto");
parameters.Append("&grant_type=authorization_code");
string p_params = parameters.ToString();
byte[] p_data_params = Encoding.UTF8.GetBytes(p_params);
HttpWebRequest request = (HttpWebRequest)WebRequest.Create("https://accounts.google.com/o/oauth2/token");
request.Accept = "application/json";
request.Method = "POST";
request.ContentType = "application/x-www-form-urlencoded";
Stream dataStream = await request.GetRequestStreamAsync();
dataStream.Write(p_data_params, 0, p_data_params.Length);
dataStream.Dispose();
HttpWebResponse response = (HttpWebResponse)await request.GetResponseAsync();
Stream responseStream = response.GetResponseStream();
StreamReader readStream = new StreamReader(responseStream, Encoding.UTF8);
string result = readStream.ReadToEnd();
Works fine for me.

How to use WebRequest in c#

I'am trying to use example api call in below link please check link
http://sendloop.com/help/article/api-001/getting-started
My account is "code5" so i tried 2 codes to get systemDate.
1. Code
var request = WebRequest.Create("http://code5.sendloop.com/api/v3/System.SystemDate.Get/json");
request.ContentType = "application/json; charset=utf-8";
string text;
var response = (HttpWebResponse)request.GetResponse();
using (var sr = new StreamReader(response.GetResponseStream()))
{
text = sr.ReadToEnd();
}
2.Code
HttpWebRequest httpWebRequest = (HttpWebRequest)WebRequest.Create("http://code5.sendloop.com/api/v3/System.SystemDate.Get/json");
httpWebRequest.Method = WebRequestMethods.Http.Get;
httpWebRequest.Accept = "application/json";
But i don't know that i use correctly api by above codes ?
When i use above codes i don't see any data or anything.
How can i get and post api to Sendloop.And how can i use api by using WebRequest ?
I will use api first time in .net so
any help will be appreciated.
Thanks.

It looks like you need to post your API key to the endpoint when making requests. Otherwise, you will not be authenticated and it will return an empty response.
To send a POST request, you will need to do something like this:
var request = WebRequest.Create("http://code5.sendloop.com/api/v3/System.SystemDate.Get/json");
request.ContentType = "application/json; charset=utf-8";
string postData = "APIKey=xxxx-xxxxx-xxxxx-xxxxx-xxxxx";
request.Method = "POST";
ASCIIEncoding encoding = new ASCIIEncoding();
byte[] data = encoding.GetBytes(postData);
request.ContentLength = data.Length;
Stream newStream = request.GetRequestStream(); //open connection
newStream.Write(data, 0, data.Length); // Send the data.
newStream.Close();
string text;
var response = (HttpWebResponse)request.GetResponse();
using (var sr = new StreamReader(response.GetResponseStream()))
{
text = sr.ReadToEnd();
}

string userAuthenticationURI =
"https://maps.googleapis.com/maps/api/distancematrix/json?origins="+ originZip +
"&destinations="+ DestinationZip + "&units=imperial&language=en-
EN&sensor=false&key=Your API Key";
if (!string.IsNullOrEmpty(userAuthenticationURI))
{
HttpWebRequest request = (HttpWebRequest)WebRequest.Create(userAuthenticationURI);
request.Method = "GET";
request.ContentType = "application/json";
WebResponse response = request.GetResponse();
var responseString = new
StreamReader(response.GetResponseStream()).ReadToEnd();
dynamic obj = JsonConvert.DeserializeObject(responseString);
}

Sequence of HttpWebRequest

I am currently in the process of automating a web interface for administrating users of an FTP.
I am trying to do this with HttpWebRequest, i have one call that logs me on the site and the second call is supose to add a new user for the FTP access.
I have tried my two urls in the browser and they work, they end up creating a user.
string login = "https://www.ftpsite.net/./panel/index.php?txvUsername=myaccount&txvPassword=myPassword&submitButton=Login";
this gets me logged in when i enter it in the browser address bar.
the second call to create a user is as follows.
string createUser = "https://www.ftpSite.net/panel/ftpsites/updatelogin?login_id=&login=toto123&realname=realnametoto&homedir=root&passwd=superpassword11&expdate=01-01-2100&neverExpire=on&quota_value=0&quota_unit=GB&group_id=0&status=on&ftp=on&filelist=on&ftp_download=on&http=on&web_filelist=on&web_download=on&email=";
This creates a user when i enter it in the browser's address bar if it follows the one that logs us in.
My problem is that i am trying to do this using HttpWebRequest and without success. I can get myself logged in but when i try to create the user it seems to return a "bad" error code saying i have created too many users already which isnt the case since i can create more after that call. Here is the code i use with HtttpRequest
_datCookie = new CookieContainer();
HttpWebRequest httpWebRequest = (HttpWebRequest)WebRequest.Create(login);
httpWebRequest.Method = "POST";
httpWebRequest.CookieContainer = _datCookie;
WebResponse response = httpWebRequest.GetResponse();
referer = response.ResponseUri.AbsoluteUri;
Stream requestStream = response.GetResponseStream();
StreamReader streamReader = new StreamReader(requestStream);
_datCookie = httpWebRequest.CookieContainer;
response.Close();
httpWebRequest = (HttpWebRequest)WebRequest.Create(createUser);
httpWebRequest.CookieContainer = _datCookie;
httpWebRequest.Referer = referer;
httpWebRequest.Method = "POST";
response = httpWebRequest.GetResponse();
requestStream = response.GetResponseStream();
streamReader = new StreamReader(requestStream);
webBrowser.DocumentText = streamReader.ReadToEnd();
response.Close();
What i caught and tried to imitate without success here.

Are you sure they should be POST requests? The URLs seem to have all of the fields in the query-string, which suggests they should be GET requests instead.
Based on the Fiddler screen-shot, you need to make a POST request with the fields in the body, not the query-string:
var cookies = new CookieContainer();
// Request 1 : Login
var request = (HttpWebRequest)WebRequest.Create("https://www.ftpsite.net/./panel/index.php");
request.Method = "POST";
request.ContentType = "application/x-www-form-urlencoded";
request.CookieContainer = cookies;
string postData = "txvUsername=myaccount&txvPassword=myPassword&submitButton=Login";
byte[] postBytes = Encoding.Default.GetBytes(postData);
request.ContentLength = postBytes.Length;
using (Stream bod = request.GetRequestStream())
{
body.Write(postBytes, 0, postBytes.Length);
}
WebResponse response = request.GetResponse();
string referer = response.ResponseUri.AbsoluteUri;
// Request 2 : Create user
request = (HttpWebRequest)WebRequest.Create("https://www.ftpSite.net/panel/ftpsites/updatelogin");
request.Method = "POST";
request.ContentType = "application/x-www-form-urlencoded";
request.CookieContainer = cookies;
postData = "login_id=&login=toto123&realname=realnametoto&homedir=root&passwd=superpassword11&expdate=01-01-2100&neverExpire=on&quota_value=0&quota_unit=GB&group_id=0&status=on&ftp=on&filelist=on&ftp_download=on&http=on&web_filelist=on&web_download=on&email=";
postBytes = Encoding.Default.GetBytes(postData);
request.ContentLength = postBytes.Length;
using (Stream bod = request.GetRequestStream())
{
body.Write(postBytes, 0, postBytes.Length);
}
response = request.GetResponse();
requestStream = response.GetResponseStream();
streamReader = new StreamReader(requestStream);
webBrowser.DocumentText = streamReader.ReadToEnd();
response.Close();

Httpwebrequest--POST method using text file

I am trying to replicate a Couch database using .NET classes instead of a curl command line. I have never used WebRequest or Httpwebrequest before, but I am attempting to use them to make a post request with the script below.
Here is the JSON script for couchdb replication(I know this works):
{ ""_id"":"database_replicate8/7/12", "source":sourcedb, ""target"":"targetDB", ""create_target"":true, ""user_ctx"": { ""roles"": ["myrole"] } }
The above script is put into a text file, sourcefile.txt. I want to take this line and put it in a POST web request using .NET functionality.
After looking into it, I chose to use the httpwebrequest class. Below is what I have so far--I got this from http://msdn.microsoft.com/en-us/library/debx8sh9.aspx
HttpWebRequest bob = (HttpWebRequest)WebRequest.Create("sourceDBURL");
bob.Method = "POST";
bob.ContentType = "application/json";
byte[] bytearray = File.ReadAllBytes(#"sourcefile.txt");
Stream datastream = bob.GetRequestStream();
datastream.Write(bytearray, 0, bytearray.Length);
datastream.Close();
Am I going about this correctly? I am relatively new to web technologies and still learning how http calls work.

Here is a method I use for creating POST requests:
private static HttpWebRequest createNewPostRequest(string apikey, string secretkey, string endpoint)
{
HttpWebRequest request = WebRequest.Create(endpoint) as HttpWebRequest;
request.Proxy = null;
request.Method = "POST";
//Specify the xml/Json content types that are acceptable.
request.ContentType = "application/xml";
request.Accept = "application/xml";
//Attach authorization information
request.Headers.Add("Authorization", apikey);
request.Headers.Add("Secretkey", secretkey);
return request;
}
Within my main method I call it like this:
HttpWebRequest request = createNewPostRequest(apikey, secretkey, endpoint);
and I then pass my data to the method like this:
string requestBody = SerializeToString(requestObj);
byte[] byteStr = Encoding.UTF8.GetBytes(requestBody);
request.ContentLength = byteStr.Length;
using (Stream stream = request.GetRequestStream())
{
stream.Write(byteStr, 0, byteStr.Length);
}
//Parse the response
using (HttpWebResponse response = request.GetResponse() as HttpWebResponse)
{
//Business error
if (response.StatusCode != HttpStatusCode.OK)
{
Console.WriteLine(string.Format("Error: response status code is{0}, at time:{1}", response.StatusCode, DateTime.Now.ToString()));
return "error";
}
else if (response.StatusCode == HttpStatusCode.OK)//Success
{
using (Stream respStream = response.GetResponseStream())
{
XmlSerializer serializer = new XmlSerializer(typeof(SubmitReportResponse));
reportReq = serializer.Deserialize(respStream) as SubmitReportResponse;
}
}
...
In my case I serialize/deserialize my body from a class - you will need to alter this to use your text file. If you want an easy drop in solution, then change the SerializetoString method to a method that loads your text file to a string.