I am new to JSON and C# and trying to write a code that will perform an http web request POST to get a token. Below is my code but I keep getting 400 bad request. Probably my codes just incorrect and I will appreciate for any helps on this. Below is my codes :
static public string GetAuthorizationToken()
{
string token = string.Empty;
string requestUrl = "some URL";
HttpWebRequest httpWebRequest = WebRequest.Create(requestUrl) as HttpWebRequest;
httpWebRequest.Method = "POST";
httpWebRequest.ContentType = "x-www-form-urlencoded";
Dictionary<string, string> postParameters = new Dictionary<string, string>();
postParameters.Add("grant", "some credentials");
postParameters.Add("id", "1234123411");
postParameters.Add("secret", "1234123411");
postParameters.Add("scope", "abcd");
string postData = "";
foreach (string key in postParameters.Keys)
{
postData += WebUtility.UrlEncode(key) + "="
+ WebUtility.UrlEncode(postParameters[key]) + "&";
}
byte[] data = Encoding.ASCII.GetBytes(postData);
httpWebRequest.ContentLength = data.Length;
Stream requestStream = httpWebRequest.GetRequestStream();
requestStream.Write(data, 0, data.Length);
requestStream.Close();
TokenResponse tokenResponse = new TokenResponse();
using (HttpWebResponse response = httpWebRequest.GetResponse() as HttpWebResponse)
{
if (response.StatusCode != HttpStatusCode.OK)
throw new Exception(String.Format(
"Server error (HTTP {0}: {1}).",
response.StatusCode,
response.StatusDescription));
DataContractJsonSerializer responseSerializer = new DataContractJsonSerializer(typeof(TokenResponse));
Stream responseStream = response.GetResponseStream();
object objResponse = responseSerializer.ReadObject(responseStream);
tokenResponse = objResponse as TokenResponse;
response.Close();
if (tokenResponse != null)
{
return tokenResponse.accessToken;
}
}
return token;
}
Here is a precise and accurate example of a POST request and reading the response(though without serializing the JSON data). Only mistake I see so far in your code is an incorrect ContentType also we can't see what url you are trying to send the server(but odds are that it is incorrect). Hope it helps you advance.
using System;
using System.Collections.Generic;
using System.Net;
using System.IO;
namespace SExperiment
{
class MainClass
{
public static void Main(string[] args)
{
try{
string webAddr="http://gurujsonrpc.appspot.com/guru";
var httpWebRequest = WebRequest.CreateHttp(webAddr);
httpWebRequest.ContentType = "application/json; charset=utf-8";
httpWebRequest.Method = "POST";
using (var streamWriter = new StreamWriter(httpWebRequest.GetRequestStream()))
{
string json = "{ \"method\" : \"guru.test\", \"params\" : [ \"Guru\" ], \"id\" : 123 }";
streamWriter.Write(json);
streamWriter.Flush();
}
var httpResponse = (HttpWebResponse)httpWebRequest.GetResponse();
using (var streamReader = new StreamReader(httpResponse.GetResponseStream()))
{
var responseText = streamReader.ReadToEnd();
Console.WriteLine(responseText);
//Now you have your response.
//or false depending on information in the response
}
}catch(WebException ex){
Console.WriteLine(ex.Message);
}
}
}
}
You have set requestUrl to "some URL". Please try with a web address that exists, in addition to changing the content type to "application/json".
Related
I am using Postman to get the response from rest end point, and if I pass wrong data I am getting 400 exception which is very correct as per the logic.
But if I try to call the same web request from C# code(with same wrong parameter), I am getting exception but not the same as I am getting in Postman tool.
ServicePointManager.SecurityProtocol = SecurityProtocolType.Tls12;
var httpWebRequest = (HttpWebRequest)WebRequest.Create("https://apiurl");
httpWebRequest.ContentType = "application/json";
httpWebRequest.Headers.Add("Authorization", "Bearer " + token);
httpWebRequest.Method = "POST";
httpWebRequest.UserAgent = ".Net application";
using (var streamWriter = new StreamWriter(httpWebRequest.GetRequestStream()))
{
string json = JsonConvert.SerializeObject(obj);//obj is parameter
streamWriter.Write(json);
}
try
{
HttpWebResponse httpResponse = (HttpWebResponse)httpWebRequest.GetResponse();
using (var streamReader = new StreamReader(httpResponse.GetResponseStream()))
{
var result = streamReader.ReadToEnd();
}
}
catch (WebException e)
{
}
Can I know why I am getting errors differently from postman and C# code
Regards
Anand
Added below code in the exception block and it gave me the same response as Postman
catch(WebException ex)
{
string message = ex.Message;
WebResponse errorResponse = ex.Response;
if (errorResponse != null)
{
using (Stream responseStream = errorResponse.GetResponseStream())
{
StreamReader reader = new StreamReader(responseStream, Encoding.GetEncoding("utf-8"));
message = reader.ReadToEnd();
}
}
}
I'm trying to log in into iCloud using a Json Post request in C#. Before trying to implement the code I was studying a little bit the iCloud requests using Chrome Console and using an Ad-on to replicate the requests in order to obtain the same result of the website.
First of All I checked the request directly from iCloud website:
And this is the response:
{
"serviceErrors" : [ {
"code" : "-20101",
"message" : "Il tuo ID Apple o la password non sono corretti."
} ]
}
Using "Advance REST Client" ad Chrome plugin to replicate the request I ve tried the same Json request to the same Url. But I get Empty response:
I Also tried to copy and paste the whole Header (All the settings) and than send the request but the response is the same:
Anyone has an Advice?
UPDATE: I tried to implement A Json request through c# program:
var httpWebRequest = (HttpWebRequest)WebRequest.Create("https://idmsa.apple.com/appleauth/auth/signin");
httpWebRequest.ContentType = "application/json";
httpWebRequest.Method = "POST";
using (var streamWriter = new StreamWriter(httpWebRequest.GetRequestStream()))
{
string json = "{accountName: \"briesanji #gmail.com\", password: \"testPassword\", rememberMe: false, trustTokens: []}";
streamWriter.Write(json);
streamWriter.Flush();
streamWriter.Close();
}
var httpResponse = (HttpWebResponse)httpWebRequest.GetResponse();
using (var streamReader = new StreamReader(httpResponse.GetResponseStream()))
{
var result = streamReader.ReadToEnd();
}
The problem is that Execution breaks when the
var httpResponse = (HttpWebResponse)httpWebRequest.GetResponse();
is hit and it gives me this error: System.Net.WebException: 'Error Remote Server: (400) Request not valid.'
UPDATE: I solved in this way:
void POST(string url, string jsonContent)
{
HttpWebRequest request = (HttpWebRequest)WebRequest.Create(url);
request.Method = "POST";
System.Text.UTF8Encoding encoding = new System.Text.UTF8Encoding();
Byte[] byteArray = encoding.GetBytes(jsonContent);
request.ContentLength = byteArray.Length;
request.ContentType = #"application/json";
using (Stream dataStream = request.GetRequestStream())
{
dataStream.Write(byteArray, 0, byteArray.Length);
}
long length = 0;
try
{
using (HttpWebResponse response = (HttpWebResponse)request.GetResponse())
{
length = response.ContentLength;
}
}
catch (WebException ex)
{
// Log exception and throw as for GET example above
}
}
string GET(string url)
{
HttpWebRequest request = (HttpWebRequest)WebRequest.Create(url);
try
{
WebResponse response = request.GetResponse();
using (Stream responseStream = response.GetResponseStream())
{
StreamReader reader = new StreamReader(responseStream, Encoding.UTF8);
return reader.ReadToEnd();
}
}
catch (WebException ex)
{
WebResponse errorResponse = ex.Response;
using (Stream responseStream = errorResponse.GetResponseStream())
{
StreamReader reader = new StreamReader(responseStream, Encoding.GetEncoding("utf-8"));
String errorText = reader.ReadToEnd();
// log errorText
}
throw;
}
}
Anyways I tested also the Answer and it was good to.. So I check it as valid thanks.
With this i dont get any error and the response content of the second request just tells me that there were too many failed logins for the test account...
private static void ICloud()
{
var cc = new CookieContainer();
var first = (HttpWebRequest)WebRequest.Create("https://idmsa.apple.com/appleauth/auth/signin?widgetKey=83545bf919730e51dbfba24e7e8a78d2&locale=de_DE&font=sf");
first.Method = "GET";
first.CookieContainer = cc;
var response1 = (HttpWebResponse)first.GetResponse();
using (var streamReader = new StreamReader(response1.GetResponseStream()))
{
var result = streamReader.ReadToEnd();
}
var second = (HttpWebRequest)WebRequest.Create("https://idmsa.apple.com/appleauth/auth/signin");
second.ContentType = "application/json";
second.Method = "POST";
second.Accept = "application/json";
second.CachePolicy = new RequestCachePolicy(RequestCacheLevel.NoCacheNoStore);
second.Referrer = "https://idmsa.apple.com/appleauth/auth/signin?widgetKey=83545bf919730e51dbfba24e7e8a78d2&locale=de_DE&font=sf";
second.Headers.Add("X-Requested-With", "XMLHttpRequest");
second.Headers.Add("X-Apple-Widget-Key", "83545bf919730e51dbfba24e7e8a78d2");
using (var streamWriter = new StreamWriter(second.GetRequestStream()))
{
string json = "{\"accountName\":\"test#icloud.com\",\"password\":\"test\",\"rememberMe\":false,\"trustTokens\":[]}";
streamWriter.Write(json);
streamWriter.Flush();
streamWriter.Close();
}
try
{
var response2 = (HttpWebResponse)second.GetResponse();
using (var streamReader = new StreamReader(response2.GetResponseStream()))
{
var result = streamReader.ReadToEnd();
}
}
catch(WebException we)
{
using (var r = new StreamReader(we.Response.GetResponseStream()))
{
var result2 = r.ReadToEnd();
}
}
}
I'm trying to use the check_eligibility call from the eBay Post-Order API in C# very unsuccessfully. Every time I get a bad response. Here is one way I've tried:
string url = "https://api.ebay.com/post-order/v2/cancellation/check_eligibility";
HttpWebRequest cancelOrderRequest = (HttpWebRequest)WebRequest.Create(url);
cancelOrderRequest.Headers.Add("Authorization", "TOKEN " + AuthToken);
cancelOrderRequest.ContentType = "application/json";
cancelOrderRequest.Accept = "application/json";
cancelOrderRequest.Headers.Add("X-EBAY-C-MARKETPLACE-ID", "EBAY_US");
cancelOrderRequest.Headers.Add("legacyOrderId", ebayFullOrderId);
cancelOrderRequest.Method = "POST";
HttpWebResponse response = (HttpWebResponse)cancelOrderRequest.GetResponse();
And here is another way I've tried:
string url = "https://api.ebay.com/post-order/v2/cancellation/check_eligibility";
var httpWebRequest = (HttpWebRequest)WebRequest.Create(url);
httpWebRequest.ContentType = "application/json";
httpWebRequest.Method = "POST";
httpWebRequest.Headers.Add("Authorization", "TOKEN " + AuthToken);
httpWebRequest.Headers.Add("X-EBAY-C-MARKETPLACE-ID", "EBAY_US");
httpWebRequest.Accept = "application/json";
using (var streamWriter = new StreamWriter(httpWebRequest.GetRequestStream()))
{
string json = "{\"legacyOrderId\":\"###-###\"";
streamWriter.Write(json);
streamWriter.Flush();
streamWriter.Close();
}
var httpResponse = (HttpWebResponse)httpWebRequest.GetResponse();
using (var streamReader = new StreamReader(httpResponse.GetResponseStream()))
{
var result = streamReader.ReadToEnd();
}
Regardless of which way I try both came back with the same message, "The remote server returned an error: (400) Bad Request." If anyone could point me in the right direction I'd greatly appreciate it. Thanks.
My second code example ended up being the correct way to solve my problem. What I realized was my json was slightly off. I was missing the extra } at the end. The below updated json syntax fixed my problem going with the code from my second example.
var json = "{\"legacyOrderId\":\"" + ebayFullOrderId + "\"}";
Please try this code:
private void MakeRequests()
{
HttpWebResponse response;
if (RequestEbay(out response))
{
response.Close();
}
}
private bool RequestEbay(out HttpWebResponse response)
{
response = null;
try
{
HttpWebRequest request = (HttpWebRequest)WebRequest.Create("https://api.ebay.com/ws/api.dll");
request.Headers.Add("X-EBAY-API-SITEID", #"0");
request.Headers.Add("X-EBAY-API-COMPATIBILITY-LEVEL", #"967");
request.Headers.Add("X-EBAY-API-CALL-NAME", #"GetOrders");
request.Method = "POST";
request.ServicePoint.Expect100Continue = false;
string body = #"<?xml version=""1.0"" encoding=""utf-8""?>
<GetOrdersRequest xmlns=""urn:ebay:apis:eBLBaseComponents"">
<RequesterCredentials>
<eBayAuthToken>!!!!!!!!!!!!!!!!YOUR EBAY TOKEN!!!!!!!!!!!!!!!!1</eBayAuthToken>
</RequesterCredentials>
<ErrorLanguage>en_US</ErrorLanguage>
<WarningLevel>High</WarningLevel>
<CreateTimeFrom>2016-12-01T19:09:02.768Z</CreateTimeFrom>
<CreateTimeTo>2017-12-15T19:09:02.768Z</CreateTimeTo>
<OrderRole>Seller</OrderRole>
</GetOrdersRequest>";
byte[] postBytes = System.Text.Encoding.UTF8.GetBytes(body);
request.ContentLength = postBytes.Length;
Stream stream = request.GetRequestStream();
stream.Write(postBytes, 0, postBytes.Length);
stream.Close();
response = (HttpWebResponse)request.GetResponse();
}
catch (WebException e)
{
if (e.Status == WebExceptionStatus.ProtocolError) response = (HttpWebResponse)e.Response;
else return false;
}
catch (Exception)
{
if(response != null) response.Close();
return false;
}
return true;
}
I'm trying to connect Django API with c # but when I connect I face a problem in C#.
Django here I use as a server API and C# as a client.
Errors in C# are "CSRF is missing or incorrect".
using System;
using System.Net;
using System.IO;
using System.Text;
using System.Collections.Generic;
using System.Net.Http;
using System.Collections.Specialized;
using System.Text.RegularExpressions;
namespace ConsoleApplication1
{
class Program
{
private static string json;
public static string url { get; private set; }
static void Main(string[] args)
{
/*
try
{
CookieContainer container = new CookieContainer();
HttpWebRequest request1 = (HttpWebRequest)WebRequest.Create("http://127.0.0.1/api/");
request1.Proxy = null;
request1.CookieContainer = container;
using (HttpWebResponse response1 = (HttpWebResponse)request1.GetResponse())
{
foreach (Cookie cookie1 in response1.Cookies)
{
//Console.WriteLine(response.IsSuccessStatusCode);
var csrf = cookie1.Value;
Console.WriteLine(csrf);
Console.WriteLine("name=" + cookie1.Name);
Console.WriteLine();
Console.Write((int)response1.StatusCode);
//PostRespone("http://localhost/api/multiplyfunction/");
}
}
}
catch (WebException e)
{
Console.WriteLine(e.Status);
}
/* HttpWebRequest request = (HttpWebRequest)WebRequest.Create("http://localhost/api/");
request.CookieContainer = Cookie; // use the global cookie variable
string postData = "100";
byte[] data = Encoding.UTF8.GetBytes(postData);
request.Method = "POST";
request.ContentType = "application/x-www-form-urlencoded; charset=utf-8";
request.ContentLength = data.Length;
using (Stream stream = request.GetRequestStream())
{
stream.Write(data, 0, data.Length);
}
WebResponse response = (HttpWebResponse)request.GetResponse();
string responseString = new StreamReader(response.GetResponseStream()).ReadToEnd();*/
WebClient csrfmiddlewaretoken = new WebClient();
CookieContainer cookieJar = new CookieContainer();
var request1 = (HttpWebRequest)HttpWebRequest.Create("http://localhost/api/");
request1.CookieContainer = cookieJar;
var response1 = request1.GetResponse();
string baseSiteString = csrfmiddlewaretoken.DownloadString("http://localhost/api/");
// string csrfToken = Regex.Match(baseSiteString, "<meta name=\"csrf-token\" content=\"(.*?)\" />").Groups[1].Value;
// wc.Headers.Add("X-CSRF-Token", csrfToken);
csrfmiddlewaretoken.Headers.Add("X-Requested-With", "XMLHttpRequest");
using (HttpWebResponse response2 = (HttpWebResponse)request1.GetResponse())
{
foreach (Cookie cookie1 in response2.Cookies)
{
//string cookie = csrfmiddlewaretoken.ResponseHeaders[HttpResponseHeader.SetCookie];//(response as HttpWebResponse).Headers[HttpResponseHeader.SetCookie];
Console.WriteLine(baseSiteString);
//Console.WriteLine("CSRF Token: {0}", csrfToken);
//Console.WriteLine("Cookie: {0}", cookie);
//
csrfmiddlewaretoken.Headers.Add(HttpRequestHeader.ContentType, "application/json; charset=utf-8");
//wc.Headers.Add(HttpRequestHeader.Accept, "application/json, text/javascript, */*; q=0.01");
var csrf1 = cookie1.Value;
string ARG1 = ("100");
string ARG2 = ("5");
string ARG = ("ARG");
string csrfmiddlewaretoken1 =cookie1.Name +"="+cookie1.Value;
csrfmiddlewaretoken.Headers.Add(HttpRequestHeader.Cookie, csrfmiddlewaretoken1);
//string csrf = string.Join(cookie, ARG1, ARG2);
//string dataString =cookie;
// string dataString = #"{""user"":{""email"":"""+uEmail+#""",""password"":"""+uPassword+#"""}}";
string dataString = "{\"ARG1\": \"100\", \"ARG2\": \"5\"}";
// string dataString = "csrftokenmiddlewaretoken="+csrfmiddlewaretoken;
//dataString += "&ARG1=10";
//dataString += "&ARG2=10";
byte[] dataBytes = Encoding.ASCII.GetBytes(dataString);
//byte[] respon2 = csrfmiddlewaretoken.DownloadData(new Uri("http://localhost/api/statusfunction/"));
WebRequest request = WebRequest.Create("http://localhost/api/statusfunction/?ARG");
// Get the response.
HttpWebResponse response = (HttpWebResponse)request.GetResponse();
// Get the stream containing content returned by the server.
Stream dataStream = response.GetResponseStream();
// Open the stream using a StreamReader for easy access.
StreamReader reader = new StreamReader(dataStream);
// Read the content.
string responseFromServer = reader.ReadToEnd();
// Display the content.
Console.WriteLine(responseFromServer);
byte[] responseBytes = csrfmiddlewaretoken.UploadData(new Uri("http://localhost/api/multiplyfunction/"), "POST", dataBytes);
string responseString = Encoding.UTF8.GetString(responseBytes);
Console.WriteLine(responseString);
// byte[] res = csrfmiddlewaretoken.UploadFile("http://localhost/api/multiplyfunction/", #"ARG1:100");
// Console.WriteLine(result);
Console.WriteLine("value=" + cookie1.Value);
Console.WriteLine("name=" + cookie1.Name);
Console.WriteLine();
Console.Write((int)response2.StatusCode);
// PostRespone("http://localhost/api/multiplyfunction/");
}
}
}
}
}
Do you accept POST requests in your Django view? If yes, you should use #csrf_exempt decorator for the view that handles POST requests. The other option is to provide CSRF token from C# side.
I am working with GoogleApi. I want to get accesstoken as response using Google api. when I am sending httpwebrequest for getting access token then
When I used :- request.Method = "POST"
Exception:- HTTP method POST is not supported by this URL
When I used :- request.Method = "GET"
Exception:- System.Net.ProtocolViolationException: Cannot send a content-body with this verb-type
The actual request might look like:
POST /o/oauth2/token HTTP/1.1
Host: accounts.google.com
Content-Type: application/x-www-form-urlencoded
code=4/P7q7W91a-oMsCeLvIaQm6bTrgtp7&
client_id=8819981768.apps.googleusercontent.com&
client_secret={client_secret}&
redirect_uri=https://oauth2-login-demo.appspot.com/code&
grant_type=authorization_code
A successful response is returned as a JSON array, similar to the following:
{
"access_token":"1/fFAGRNJru1FTz70BzhT3Zg",
"expires_in":3920,
"token_type":"Bearer"
}
My Code is :-
var request = (HttpWebRequest)WebRequest.Create(#"https://accounts.google.com");
request.Method = "POST";
request.ContentType = "application/json";
//request.KeepAlive = false;
// request.Headers[HttpRequestHeader.Authorization] = "";
//request.ContentLength = 0;
using (StreamWriter streamWriter = new StreamWriter(request.GetRequestStream()))
{
string json = "{\"code\":\"4/M1IIC8htCuvYORuVJK16oadDb3Gd.cigIKgaPjvUYXE-sT2ZLcbSrckCLgwI\"," + "\"client_id\":\"841994137170.apps.googleusercontent.com\"," + "\"client_secret\":\"MXjKvevD_cKp5eQWZ1RFXfdo\"," + "\"redirect_uri\":\"http://gmailcheck.com/response.aspx\"," + "\"grant_type\":\"authorization_code\"}";
streamWriter.Write(json);
// streamWriter.Flush();
//streamWriter.Close();
}
try
{
using (HttpWebResponse response = (HttpWebResponse)request.GetResponse())
{
StreamReader responsereader = new StreamReader(response.GetResponseStream());
var responsedata = responsereader.ReadToEnd();
//Session["responseinfo"] = responsereader;
}
}
catch (WebException ex)
{
using (WebResponse response = ex.Response)
{
var httpResponse = (HttpWebResponse)response;
using (Stream data = response.GetResponseStream())
{
var sr = new StreamReader(data);
throw new Exception(sr.ReadToEnd());
}
}
}
This is the problem:
var request = (HttpWebRequest)WebRequest.Create(#"https://accounts.google.com");
That's not the URL you showed originally. That's just the domain root. You need:
var request = (HttpWebRequest)WebRequest.Create("https://accounts.google.com/o/oauth2/token");
I've removed the # as your string doesn't include any line breaks or backslashes, so there's no benefit in using a verbatim string literal.
(Additionally, I'd expect this to be covered in the Google Client APIs - is it not?)