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SOLVED C# HttpWebResponse delivers different response than Postman

I'm consuming a Web API of an internal system in the company.
It's getting a payload in JSON format and returning a response with data in JSON format.
When sending the request with Postman, it returns the expected response (StatusCode=200 + a response text in JSON format). That means that everything is OK with the web service.
Now I have to develop an application in C# to send this HTTP request.
The problem is, that I receive as response content "OK" and not the expected JSON response gotten with Postman.
public HttpWebResponse SendRequest(string url, string checkOutFolder, string drawingNo, string login, string password)
{
HttpWebRequest request = (HttpWebRequest)WebRequest.Create(url);
request.ContentType = "application/json";
request.Method = "GET";
request.Accept = "application/json";
string payload = GeneratePayLoad(checkOutFolder, drawingNo);
string header = CreateAuthorization(login, password);
request.Headers[HttpRequestHeader.Authorization] = header;
request.ServicePoint.Expect100Continue = false;
var type = request.GetType();
var currentMethod = type.GetProperty("CurrentMethod", BindingFlags.NonPublic | BindingFlags.Instance).GetValue(request);
var methodType = currentMethod.GetType();
methodType.GetField("ContentBodyNotAllowed", BindingFlags.NonPublic | BindingFlags.Instance).SetValue(currentMethod, false);
using (var streamWriter = new StreamWriter(request.GetRequestStream()))
{
streamWriter.Write(payload);
}
// Response
HttpWebResponse response = (HttpWebResponse)request.GetResponse();
using (StreamReader rd = new StreamReader(response.GetResponseStream()))
{
string responseContent = rd.ReadToEnd();
Console.WriteLine(responseContent);
}
return response;
}
Has anyone already experiences something similar.
Can you help me?
EDIT
Following your suggestions
1) Changed the method to POST -> result is still the same
2) Used Postman's code generator and RestSharp -> result is still the same
public void Request(string url, string checkOutFolder, string drawingNo, string login, string password)
{
var client = new RestClient(url);
var request = new RestRequest();
request.Method = Method.Post;
request.AddHeader("Content-Type", "application/json");
request.AddHeader("Authorization", "Basic **********");
var body = GeneratePayLoad(checkOutFolder, drawingNo);
request.AddParameter("application/json", body, ParameterType.RequestBody);
var response = client.Execute(request);
Console.WriteLine(response.Content);
}
Changed to HttpClient -> result still the same
using (var client = new HttpClient())
{
string uri = "******************";
string path = "destinationpath";
var endpoint = new Uri(uri);
string payload = GeneratePayLoad(path, "100-0000947591");
//FormUrlEncodedContent form = new FormUrlEncodedContent(payload);
var stringContent = new StringContent(payload);
var payload2 = new StringContent(payload, Encoding.UTF8, "application/json");
var byteArray = Encoding.ASCII.GetBytes("*******");
client.DefaultRequestHeaders.Authorization = new AuthenticationHeaderValue("Basic", Convert.ToBase64String(byteArray));
var base64EncodedAuthenticationString = Convert.ToBase64String(System.Text.ASCIIEncoding.ASCII.GetBytes(client.DefaultRequestHeaders.Authorization.ToString()));
var result = client.PostAsync(endpoint, stringContent).Result.Content.ReadAsStringAsync().Result;
Console.WriteLine("test");
}
Wrote a Python code using requests Package -> delivers the same as Postman. So the problem is in the C# code.
Does anyone have an idea what is going on?
SOLVED
The issue was on the payload generation!

The request needs to be an HTTP POST and not HTTP GET because it contains JSON payload.
request.Method = "GET"; should be request.Method = "POST";
That would be one of the issue(s). I am not sure if there is something else that is wrong, but try changing the request method to POST and try again.

Why am I getting this 401 unauthorized error while using Hammock with the Tumblr API to retrieve likes?

Here is the code that I am using:
public static void FetchXML()
{
_url = new Uri("http://api.tumblr.com/v2/blog/" + _username + ".tumblr.com/likes?api_key=REc3Z6l4ZYss11a8lX6KKje0X8Hsi9U77SyaPbQrOBBCGJGA6D");
var client = new RestClient();
client.Authority = _url.ToString();
var request = new RestRequest();
request.AddParameter("limit", "20");
request.AddParameter("offset", _offset.ToString());
var response = client.Request(request);
var content = response.Content.ToString();
var parsedResponse = JsonParser.FromJson(content);
}
If I take the Uri value and paste it into my browser (using a valid Tumblr username) I'm getting the correct Json, but in my application the content of response is:
"{\"meta\":{\"status\":401,\"msg\":\"Unauthorized\"},\"response\":[]}"
Anyone have any idea why this is? According to the Tumblr API
retrieving likes should only need the API key, which I am providing.

Hi you can use the below code to get the response.
HttpWebRequest request = (HttpWebRequest)WebRequest.Create(URL);
request.Method = "GET";
request.ContentType = "Application/json";
HttpWebResponse response = (HttpWebResponse)request.GetResponse();
Stream receive = response.GetResponseStream();
StreamReader reader = new StreamReader(receive, Encoding.UTF8);
string respond = reader.ReadToEnd();

Sending an HTTP PUT request with a parameter in C#

I have a tika server open on my PC, and I need to send it a request with a string parameter which is a path for a file I want tika to process. The code I have so far is:
private void getFromServer(string fileName)
{
var httpWebRequest = (HttpWebRequest)WebRequest.Create("http://localhost:9998/rmeta");
httpWebRequest.Accept = "application/json";
httpWebRequest.Method = "PUT";
httpWebRequest.KeepAlive = true;
using (var streamWriter = new StreamWriter(httpWebRequest.GetRequestStream()))
{
string postData = #"C:\Users\######\Downloads\elasticsearch\elasticsearch-1.7.1.zip";
byte[] byteArray = Encoding.ASCII.GetBytes(postData);
string json = postData;
streamWriter.Write(json);
}
var httpResponse = (HttpWebResponse)httpWebRequest.GetResponse();
using (var streamReader = new StreamReader(httpResponse.GetResponseStream()))
{
var responseText = streamReader.ReadToEnd();
//Now you have your response.
//or false depending on information in the response
console.write(responseText);
}
}
The thing is, the server gets the request, but it returns the string I sent it instead of the contents of the file in question, and I know it can work because I sent it the same request using a cURL command and it worked. Any ideas what I'm doing wrong?
PS the hashtags are instead of my username

How to create HTTP post request

Hello I'm new at programing so my question might be a little bit odd. My boss ask me to create a HTTP post request using a key and a message to access our client.
I already seen the article Handle HTTP request in C# Console application but it doesn't include where I put the key and message so the client API knows its me. Appreciate the help in advance.

I believe you wanted this:
HttpWebRequest httpWReq =
(HttpWebRequest)WebRequest.Create("http://domain.com/page.aspx");
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 stream = httpWReq.GetRequestStream())
{
stream.Write(data,0,data.Length);
}
HttpWebResponse response = (HttpWebResponse)httpWReq.GetResponse();
string responseString = new StreamReader(response.GetResponseStream()).ReadToEnd();

You could use a WebClient:
using (var client = new WebClient())
{
// Append some custom header
client.Headers[HttpRequestHeader.Authorization] = "Bearer some_key";
string message = "some message to send";
byte[] data = Encoding.UTF8.GetBytes(message);
byte[] result = client.UploadData(data);
}
Of course depending on how the API expects the data to be sent and which headers it requires you will have to adapt this code to match the requirements.

Get access token from google oauth from code

i used following code to get the access token from code as below
String code = HttpContext.Current.Request["code"];
string redirecturl = HttpContext.Current.Request["url"];
string Url = "https://accounts.google.com/o/oauth2/token";
string grant_type = "authorization_code";
string redirect_uri_encode = UrlEncodeForGoogle(url);
string data = "code={0}&client_id={1}&client_secret={2}&redirect_uri={3}&grant_type={4}&access_type={5}";
HttpWebRequest request = HttpWebRequest.Create(Url) as HttpWebRequest;
string result = null;
request.Method = "POST";
request.KeepAlive = true;
request.ContentType = "application/x-www-form-urlencoded";
string param = string.Format(data, code,configurationInfo.oauthclientid , configurationInfo.oauthclientsecretid, redirect_uri_encode, grant_type, "offline");
var bs = Encoding.UTF8.GetBytes(param);
using (Stream reqStream = request.GetRequestStream())
{
reqStream.Write(bs, 0, bs.Length);
}
using (WebResponse response = request.GetResponse())
{
var sr = new StreamReader(response.GetResponseStream());
result = sr.ReadToEnd();
sr.Close();
}
i am getting response as
The remote server returned an error: (400) Bad Request.
i do not know where i went wrong
waiting for your valuable comments

Google also provides a higher level library for accessing its services. I find it makes it much easier to work with its APIs.
http://code.google.com/p/google-api-dotnet-client/