Develop Reference

Set the Authentication Token Profile Header

I have an OpenIdConnect Server I'm connecting to an I would like to forward token data the first time logging in to be stored on the server. Currently I'm doing this to forward the access token
var xhr = new XMLHttpRequest();
xhr.open("GET", url);
xhr.onload = function () {
log(xhr.status, JSON.parse(xhr.responseText));
}
xhr.setRequestHeader("Authorization", "Bearer " + user.access_token);
xhr.send();
I want to send the Profile Data as well but I don't know the proper header.
How can I do something like this:
xhr.setRequestHeader("Authorization-Profile", "Bearer " + user.profile);
Does anyone know the proper header so I can add these claims to the access token.

Here is an example of what we did in one of our project:
Created a common API response class as below:
public class ApiCommonResponse
{
public object Object { get; set; }
public int httpStatus { get; set; }
public string httpErrorMessage { get; set; }
}
And a generic method to call GET and POST API endpoints. This method will map the response to the supplied data model and will return you the object.
public static ApiCommonResponse GetApiData<T>(string token, T dataModel, string apiEndPoint = null)
{
var responseText = "";
var apiCommonResponse = new ApiCommonResponse();
if (apiEndPoint != null)
{
var request = (HttpWebRequest)WebRequest.Create(apiEndPoint);
request.Method = "GET";
request.ContentType = "application/json";
request.Headers.Add("Authorization", "Bearer " + token);
request.Headers.Add("X-Api-Version", "");
try
{
var httpResponse = (HttpWebResponse)request.GetResponse();
var stream = httpResponse.GetResponseStream();
if (stream != null)
{
using (var streamReader = new StreamReader(stream))
{
responseText = streamReader.ReadToEnd();
}
}
}
catch (WebException we)
{
var stream = we.Response.GetResponseStream();
if (stream != null)
{
var resp = new StreamReader(stream).ReadToEnd();
dynamic obj = JsonConvert.DeserializeObject(resp);
throw new Exception(obj.ToString());
}
}
}
var jsonSettings = new JsonSerializerSettings { MissingMemberHandling = MissingMemberHandling.Ignore };
apiCommonResponse.Object = JsonConvert.DeserializeObject<T>(responseText, jsonSettings);
apiCommonResponse.httpStatus = 0;
return apiCommonResponse;
}
public static ApiCommonResponse PostApiData<T>(string username, string token, T dataModel, string apiEndPoint = null)
{
var apiCommonResponse = new ApiCommonResponse();
if (apiEndPoint == null) return null;
var webRequest = WebRequest.Create(apiEndPoint);
webRequest.Method = "POST";
webRequest.Timeout = 20000;
webRequest.ContentType = "application/json";
request.Headers.Add("Authorization", "Bearer " + token);
webRequest.Headers.Add("X-Api-Version", "");
using (var requeststreams = webRequest.GetRequestStream())
{
using (var sw = new StreamWriter(requeststreams))
{
sw.Write(JsonConvert.SerializeObject(dataModel));
}
}
try
{
var httpStatus = (((HttpWebResponse)webRequest.GetResponse()).StatusCode);
var httpMessage = (((HttpWebResponse)webRequest.GetResponse()).StatusDescription);
using (var s = webRequest.GetResponse().GetResponseStream())
{
if (s == null) return null;
using (var sr = new StreamReader(s))
{
var responseObj = sr.ReadToEnd();
if (!string.IsNullOrEmpty(responseObj))
{
apiCommonResponse = JsonConvert.DeserializeObject<ApiCommonResponse>(responseObj);
}
}
apiCommonResponse.httpStatus = (int)httpStatus;
apiCommonResponse.httpErrorMessage = httpMessage;
apiCommonResponse.Object = apiCommonResponse.Object;
}
}
catch (WebException we)
{
var stream = we.Response.GetResponseStream();
if (stream != null)
{
var resp = new StreamReader(stream).ReadToEnd();
dynamic obj = JsonConvert.DeserializeObject(resp);
throw new Exception(obj.ToString());
}
}
return apiCommonResponse;
}

Xamarin Forms Json Service Insert Data

I want to add a record to the json service in my application. How can I do this via Service Url. Here is my code.
CustomerModel customer = new CustomerModel();
customer.Name = entryCompanyName.Text;
customer.Title = entryCompanyTitle.Text;
customer.PhoneNumber = entryTelephone.Text;
customer.FaxNumber = entryFax.Text;
customer.Email = entryEmail.Text;
customer.CityId = 6444;
string json = JsonConvert.SerializeObject(customer);
string sContentType = "application/json";
string path = "service url";
HttpClient Client = new HttpClient();
var task = Client.PostAsync(path, new StringContent(json.ToString(), Encoding.UTF8, sContentType));
I'm trying M. Wiśnicki's solution, but I took this error
I did not get an error when I added System.net :( Where do i make mistakes?

This worked for me
public static async Task<string> PostEntityToApi<T>(string yourMethodUrl, T yourModel)
{
try
{
if (_httpClient == null)
{
_httpClient = new HttpClient { BaseAddress = new Uri(yourWebSiteUrl) };
}
var stringContentInput = new StringContent(JsonConvert.SerializeObject(dto), Encoding.UTF8, "application/json");
var response = await _httpClient.PostAsync(new Uri(yourWebSiteUrl. + apiUrl), stringContentInput);
if (!response.IsSuccessStatusCode)
{
throw new Exception(response.StatusCode.ToString());
}
var stringAsync = await response.Content.ReadAsStringAsync();
LoggingManager.Error("Received error response: " + stringAsync);
return stringAsync;
}
catch (Exception exception)
{
return null;
}
}

You can use WebRequest, this sample working for me, i use it in my app.
This is System.Net.WebRequest class, here you find doc.
public async Task<string> PostSample(object data, string uri)
{
// Create an HTTP web request using the URL:
var request = (HttpWebRequest) WebRequest.Create(new Uri(uri));
request.ContentType = "application/json";
request.Method = "POST";
var itemToSend = JsonConvert.SerializeObject(data);
using (var streamWriter = new StreamWriter(await request.GetRequestStreamAsync()))
{
streamWriter.Write(itemToSend);
streamWriter.Flush();
streamWriter.Dispose();
}
// Send the request to the server and wait for the response:
using (var response = await request.GetResponseAsync())
{
// Get a stream representation of the HTTP web response:
using (var stream = response.GetResponseStream())
{
var reader = new StreamReader(stream);
var message = JsonConvert.DeserializeObject<string>(reader.ReadToEnd());
return message;
}
}
}

Paypal saved card rest API through 400 Bad Request error in C#

I am developing application using .net MVC C#. I tried to call rest API of PayPal for save credit card details, my code were working fine but suddenly it starting through 400 Bad Request exception. here is my code,
private static async Task<string> StorePaymentCards(string accessToken, PaymentInfoModel cardDetails)
{
try
{
var httpWebRequest = (HttpWebRequest)WebRequest.Create("https://api.sandbox.paypal.com/v1/vault/credit-card");
var result = "";
httpWebRequest.ContentType = "application/json; charset=utf-8";
httpWebRequest.Method = "POST";
httpWebRequest.Accept = "application/json; charset=utf-8";
httpWebRequest.Headers.Add("Authorization", "Bearer " + accessToken);
using (var streamWriter = new StreamWriter(httpWebRequest.GetRequestStream()))
{
var loginjson = new JavaScriptSerializer().Serialize(new
{
payer_id = cardDetails.PayerId.Trim(),
type = cardDetails.CardType.Trim(),
number = cardDetails.CardNumber.Trim(),
expire_month = cardDetails.ExpireMonth.Trim(),
expire_year = cardDetails.ExpireYear.Trim(),
first_name = cardDetails.FirstName.Trim()
});
streamWriter.Write(loginjson);
streamWriter.Flush();
streamWriter.Close();
//The code fails when creating the Response here, and go into catch block
var httpResponse = (HttpWebResponse)httpWebRequest.GetResponse();
using (var streamReader = new StreamReader(httpResponse.GetResponseStream()))
{
result = streamReader.ReadToEnd();
}
return result;
}
}
catch (Exception ex)
{
return ex.GetBaseException().Message;
}
}
}
Can anyone help me out from this error?
Thank you in advance.

private static async Task<string> StorePaymentCards(string accessToken, PaymentInfoModel cardDetails)
{
try
{
//my stuff
}
catch (WebException ex)
{
string text = null;
using (WebResponse response = ex.Response)
{
HttpWebResponse httpResponse = (HttpWebResponse)response;
Console.WriteLine("Error code: {0}", httpResponse.StatusCode);
using (Stream data = response.GetResponseStream())
using (var reader = new StreamReader(data))
{
text = reader.ReadToEnd();
Console.WriteLine(text);
}
}
return text; //ex.GetBaseException().Message;
}
}
This is changed I have done in my catch block to trace proper error, so it return me that error which I was facing.

C# Xamarin Android Rest call in PCL error "Unexpected character encountered while parsing value: S. Path '', line 0, position 0."

I have used SO to help with several issues in the past. However, I cannot find a solution to something I have been struggling with for 2 days now.
I am a noob, please be kind :)
I have an app that I created using Xamarin Studio, targeted for Android. It is a basic GET request from a Rest Api. It was working perfectly until I realized I was not helping myself when it came time to create the same app in IOS and Windows. Once I changed my project to utilize a PCL I started getting errors, primarily around my RestClient class (originally got from http://www.codeproject.com/Tips/497123/How-to-make-REST-requests-with-Csharp)
From my droid app class:
var apiUser = GetString(Resource.String.apiUser);
var apiPass = GetString(Resource.String.apiPass);
//Get token from API
string token = authenticate(apiUser,apiPass);
public static string authenticate(string apiUser, string apiPass)
{
Authentication Auth = new Authentication ();
try
{
// set json by passing AuthenticationUrl as endpoint, returns json data
var o = JObject.Parse(EntryRepository.getJson(PJTApiUrls.getAuthenticationUrl(apiUser,apiPass)));
Auth.Token = (string)o["Token"];
return Auth.Token;
}
catch (Exception e)
{
// Couldn't do stuff. Log the exception.
// TODO possible timeout, try again, if fails again then return error message
if (e.Message.Contains("400") || e.Message.Contains("401"))
{
string error = string.Format("Invalid credentials, please try again");
return error;
} else {
string error = string.Format ("An error occurred: \r\n{0}", e.Message);
return error;
}
}
}
getAuthenticationUrl gets the api URL.
Here is getJson (in PCL):
public static string getJson(string endpoint)
{
string apiurl = endpoint;
var client = new _RestClient();
client.EndPoint = apiurl;
client.ContentType = "application/json";
client.Method = HttpVerb.GET;
//client.Method = HttpVerb.POST;
client.PostData = "";
//client.PostData = "{postData: value}";
//client.PostData = "{'someValueToPost': 'The Value being Posted'}";
var json = client._MakeRequestAsync();
// to append parameters, pass them into make request:
//var json = client.MakeRequest("?param=0");
return json.ToString();
}
And for the _RestClient class (in PCL):
public async Task<string> _MakeRequestAsync()
{
try {
var request = _MakeRequestAsync ("");
return await request;
}
catch (Exception e){
return e.Message;
}
}
public async Task<string> _MakeRequestAsync(string parameters)
{
var uri = new Uri(EndPoint + parameters);
var request = WebRequest.Create(uri) as HttpWebRequest;
using (var response = await request.GetResponseAsync () as HttpWebResponse) {
var responseValue = string.Empty;
if (response.StatusCode != HttpStatusCode.OK) {
var message = String.Format ("Request failed. Received HTTP {0}", response.StatusCode);
throw new Exception (message);
}
// grab the response
using (var responseStream = await Task.Factory.FromAsync<Stream>(request.BeginGetRequestStream, request.EndGetRequestStream, null)) {
//using (var responseStream = response.GetResponseStream ()) {
if (responseStream != null)
using (var reader = new StreamReader (responseStream)) {
responseValue = reader.ReadToEnd ();
}
}
return responseValue;
}
}
responseValue is returning null
return await request is saying "Status = Waiting for activation"
I have also had the error: "Unexpected character encountered while parsing value: S. Path '', line 0, position 0."
But this works if the RestClient class is within Droid (Instead of the shared PCL) and contains the following:
public string MakeRequest ()
{
return MakeRequest ("");
}
public string MakeRequest (string parameters)
{
var request = (HttpWebRequest)WebRequest.Create (EndPoint + parameters);
request.Method = Method.ToString ();
request.ContentLength = 0;
request.ContentType = ContentType;
if (!string.IsNullOrEmpty (PostData) && Method == HttpVerb.POST) {
var bytes = Encoding.GetEncoding ("iso-8859-1").GetBytes (PostData);
request.ContentLength = bytes.Length;
using (var writeStream = request.GetRequestStream ()) {
writeStream.Write (bytes, 0, bytes.Length);
}
}
using (var response = (HttpWebResponse)request.GetResponse ()) {
var responseValue = string.Empty;
if (response.StatusCode != HttpStatusCode.OK) {
var message = String.Format ("Request failed. Received HTTP {0}", response.StatusCode);
throw new ApplicationException (message);
}
// grab the response
using (var responseStream = response.GetResponseStream ()) {
if (responseStream != null)
using (var reader = new StreamReader (responseStream)) {
responseValue = reader.ReadToEnd ();
}
}
return responseValue;
}
}
I cannot figure this out, any help/guidance is appreciated. Let me know if I can clarify anything.
***** UPDATE ***** Thanks to #milen-pavlov help thus far, here is where I am currently at:
in Android project:
var apiUser = GetString(Resource.String.apiUser);
var apiPass = GetString(Resource.String.apiPass);
//Get token from API
var token = await authenticate(apiUser,apiPass);
lblOutput.Text = token;
calls (also in Android project):
public static async Task<string> authenticate(string apiUser, string apiPass)
{
Authentication Auth = new Authentication ();
try
{
// set json by passing AuthenticationUrl as endpoint, returns json data
var o = JObject.Parse(await EntryRepository.getJson(PJTApiUrls.getAuthenticationUrl(apiUser,apiPass)));
Auth.Token = (string)o["Token"];
return Auth.Token;
}
catch (Exception e)
{
if (e.Message.Contains("400") || e.Message.Contains("401"))
{
string error = string.Format("Invalid credentials, please try again");
return error;
} else {
string error = string.Format ("An error occurred: \r\n{0}", e.Message);
return error;
}
}
}
Calls json class in PCL project:
public static async Task<string> getJson(string endpoint)
{
string apiurl = endpoint;
var client = new _RestClient();
client.EndPoint = apiurl;
client.ContentType = "application/json";
client.Method = HttpVerb.GET;
client.PostData = "";
var json = await client._MakeRequestAsync();
return json;
}
which then calls restclient class in PCL project:
public async Task<string> _MakeRequestAsync()
{
var request = _MakeRequestAsync ("");
return await request;
}
public async Task<string> _MakeRequestAsync(string parameters)
{
var uri = new Uri(EndPoint + parameters);
using (var client = new HttpClient())
{
var response = await client.GetAsync(uri);
return await response.Content.ReadAsAsync<string>();
};
}
End result/error:
Any guidance is appreciated!

Can you use HttpClient instead?
Sample Get request will look similar to this:
public async Task<string> _MakeRequestAsync(string parameters)
{
var uri = new Uri(EndPoint + parameters);
using (var client = new HttpClient())
{
var response = await client.GetAsync(uri);
return await result.Content.ReadAsStringAsync();
};
}

c# catch empty Json / 404 error

I have the following code for accessing a Api which returns a Json value. Now it's possible that i try to access the api but nothing is being returned, aka the given ID its trying to search doesnt exist. This ofcourse returns a 404 but i do not know how to handle this error so the code continious on going, now it breaks the program and crashes.
public RootObject GetApi(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);
var jsonReader = new JsonTextReader(reader);
var serializer = new JsonSerializer();
return serializer.Deserialize<RootObject>(jsonReader);
}
}
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;
}
}
This is the button click event where the Url of the api is given.
private void button1_Click(object sender, EventArgs e)
{
result_rTBox.Text = "";
api_Handler api_Handler = new api_Handler();
string spidyApi_itemSearch = "http://www.gw2spidy.com/api/v0.9/json/item-search/";
string Gw2Api_allListings = "https://api.guildwars2.com/v2/commerce/listings/";
string userInput_itemName = userSearchInput_tBox.Text;
string spidyApi_searchIdByName = spidyApi_itemSearch + userInput_itemName;
if (!string.IsNullOrWhiteSpace(userSearchInput_tBox.Text)){
var spidyApi_searchIdByName_result = api_Handler.GetApi(spidyApi_searchIdByName);
var Gw2Api_isItemIdinListing_result = api_Handler.GetApi(Gw2Api_allListings + spidyApi_searchIdByName_result.results[0].data_id);
//result_rTBox.Text = Gw2Api_isItemIdinListing_result.results[0].data_id.ToString();
}
}
First i access the api with string "spidApi_itemSearch" and after that I have and ID that i need to check if exists in the api Gw2Api_allListings. If it doesnt exist, which will happen quite often, it returns nothing with a 404 error. How do i get around of making the code continue even if it returns nothing?
EDIT: code that i have now, still crashes on the break.
HttpWebRequest request = (HttpWebRequest)WebRequest.Create(url);
try
{
var requesting = WebRequest.Create(url);
using (var response = request.GetResponse())
{
using (var responseStream = response.GetResponseStream())
{
StreamReader reader = new StreamReader(responseStream, Encoding.UTF8);
var jsonReader = new JsonTextReader(reader);
var serializer = new JsonSerializer();
return serializer.Deserialize<RootObject>(jsonReader);
}
}
}
catch (WebException ex)
{
if (ex.Status == WebExceptionStatus.ProtocolError &&
ex.Response != null)
{
var resp = (HttpWebResponse)ex.Response;
if (resp.StatusCode == HttpStatusCode.NotFound){
}
}
throw;
}
}

Use the HttpStatusCode Enumeration, specifically HttpStatusCode.NotFound
Instead of WebResponse, try using HttpWebResponse
HttpWebResponse errorResponse = we.Response as HttpWebResponse;
if (errorResponse.StatusCode == HttpStatusCode.NotFound) {
// handle the error here
}
Where we is a WebException