I have paypal integration application which receives webhook notification from paypal and I want to verify the signature as per docs:
Verify signature rest api link
Here is code which I have written:
public async Task<ActionResult> Index()
{
var stream = this.Request.InputStream;
var requestheaders = HttpContext.Request.Headers;
var reader = new StreamReader(stream);
var jsonReader = new JsonTextReader(reader);
var serializer = new JsonSerializer();
var webhook = serializer.Deserialize<Models.Event>(jsonReader);
var webhookSignature = new WebhookSignature();
webhookSignature.TransmissionId = requestheaders["PAYPAL-TRANSMISSION-ID"];
webhookSignature.TransmissionTime = requestheaders["PAYPAL-TRANSMISSION-TIME"];
webhookSignature.TransmissionSig = requestheaders["PAYPAL-TRANSMISSION-SIG"];
webhookSignature.WebhookId = "My actual webhookid from paypal account";
webhookSignature.CertUrl = requestheaders["PAYPAL-CERT-URL"];
webhookSignature.AuthAlgo = requestheaders["PAYPAL-AUTH-ALGO"];
webhookSignature.WebhookEvent = webhook;
var jsonStr2 = JsonConvert.SerializeObject(webhookSignature);
var result = await _webhookService.VerifyWebhookSignatureAsync(webhookSignature);
var jsonStr3 = JsonConvert.SerializeObject(result);
return Content(jsonStr3, "application/json");
}
public async Task<Models.SignatureResponse> VerifyWebhookSignatureAsync(Models.WebhookSignature webhook, CancellationToken cancellationToken = default(CancellationToken))
{
var accessTokenDetails = await this.CreateAccessTokenAsync();
_httpClient.DefaultRequestHeaders.Add("Authorization", "Bearer " + accessTokenDetails.AccessToken);
try
{
string jsonStr = JsonConvert.SerializeObject(webhook);
var content = new StringContent(jsonStr, Encoding.UTF8, "application/json");
string url = $"{_baseUrl}notifications/verify-webhook-signature";
var response = await _httpClient.PostAsync(url, content);
if (!response.IsSuccessStatusCode)
{
var error = await response.Content.ReadAsStringAsync();
throw new Exception(error);
}
string jsonContent = response.Content.ReadAsStringAsync().Result;
return JsonConvert.DeserializeObject<Models.SignatureResponse>(jsonContent);
}
catch (Exception ex)
{
throw new InvalidOperationException("Request to Create payment Service failed.", ex);
}
}
Webhook signature verification response :
{"verification_status":"FAILURE"}
I am getting 200K ok response from api but verification status in response is always FAILURE.I tried many different request.
I am not sure if something is wrong from my request. Looking for help.
Related
although, i have a token xamarin gives 401 error when i post to rest api, or get..have you any solution ?
public async Task<List<Gorev>> GetGorevlerAsync(Gorev Gorev, string accessToken)
{
var client = new HttpClient();
client.DefaultRequestHeaders.Authorization = new AuthenticationHeaderValue("Bearer", accessToken);
var json = JsonConvert.SerializeObject(Gorev);
HttpContent content = new StringContent(json);
content.Headers.ContentType = new MediaTypeHeaderValue("application/json");
string uri = Constants.BaseApiAddress + "http/GorevTeamLstStored";
var ReturnJson = await client.PostAsync(uri, content);
var ls = ReturnJson.Content.ReadAsStringAsync().Result;
var Gorevler = JsonConvert.DeserializeObject<List<Gorev>>(ls);
return Gorevler;
.
}
Hi I am just learning Xamarin android development and I just want to CRUD operation but I am stuck that I am unable to get any response from webapi. I have tested my api using SOAPUI and response is ok from that.
[HttpPost]
public HttpResponseMessage CreateEmpAttandance(string value)
{
if (value != "1234")
{
string json = #"{ data: 'Emp Code is not valid.'}";
var jObject = JObject.Parse(json);
var response = Request.CreateResponse(HttpStatusCode.OK);
response.Content = new StringContent(jObject.ToString(), System.Text.Encoding.UTF8, "application/json");
return response;
}
else
{
string json = #"{ data: 'data save sucessfully.'}";
var jObject = JObject.Parse(json);
var response = Request.CreateResponse(HttpStatusCode.OK);
response.Content = new StringContent(jObject.ToString(), System.Text.Encoding.UTF8, "application/json");
return response;
}
}
this is api code and below is my android application code but I am getting null response exception.
public async Task SaveTodoItemAsync(string EmpCode)
{
try
{
string url = "http://192.168.1.9/attandanceapi/api/attandance?value=12132";
var uri = new Uri(string.Format(url));
var json = JsonConvert.SerializeObject(EmpCode);
var content = new StringContent(EmpCode, Encoding.UTF8, "application/json");
HttpResponseMessage response = null;
response = await client.PostAsync(url, content);
var responses = response;
}
catch (Exception ex)
{
var w = ex.ToString();
}
}
I think we have problem here. You are trying to create content from string not from Json.
var content = new StringContent(EmpCode, Encoding.UTF8, "application/json");
try this:
var content = new StringContent(json, Encoding.UTF8, "application/json");
Edit:
I cannot see your default headers so if you don't have them - just add.
client.DefaultRequestHeaders.Add("Accept", "application/json");
I have an APIController Method as below. Basically I need to validate an API response. So it's an API call within an API call.
public class DCController : ApiController
{
[HttpPost]
public HttpResponseMessage SampleMethod(string url)
{
var uri = new Uri(url);
var baseAddress = uri.GetLeftPart(System.UriPartial.Authority);
var apiAddress = url.Replace(baseAddress + "/", "");
var responseString = string.Empty;
using (var client = new HttpClient())
{
client.BaseAddress = new Uri(baseAddress);
client.DefaultRequestHeaders.Accept.Clear();
client.DefaultRequestHeaders.Accept.Add(new MediaTypeWithQualityHeaderValue("application/json"));
var response = client.GetAsync(apiAddress).Result;
if (response.IsSuccessStatusCode)
{
responseString = response.Content.ReadAsStringAsync().Result;
}
}
if (!string.IsNullOrEmpty(responseString) && responseString.ToString().Validate())
{
return Request.CreateResponse(HttpStatusCode.OK, "Validated");
}
else
{
return Request.CreateErrorResponse(HttpStatusCode.BadRequest, "Invalid");
}
}
Issue:
1. Request object is null in the return lines.
2. If i try creating a request object -
var request = new HttpRequestMessage();
It throws below error:
An exception of type 'System.InvalidOperationException' occurred in
System.Web.Http.dll but was not handled in user code
Additional information: The request does not have an associated
configuration object or the provided configuration was null.
Not sure what settings I need to add. I am relatively new to working with APIs. Any help is appreciated.
I could get it working by below code -
[HttpPost]
public HttpResponseMessage Get(string url)
{
string responseString = GetWebApiData(url); //Extracted the method
HttpResponseMessage response = new HttpResponseMessage();
if (!string.IsNullOrEmpty(responseString) && responseString.ToString().Validate())
{
response.ReasonPhrase = "Valid";
response.StatusCode = HttpStatusCode.OK;
}
else
{
response.ReasonPhrase = "Invalid";
response.StatusCode = HttpStatusCode.BadRequest;
}
return response;
}
Hello i'm doing an xamarin.form application and i'm implementing the twitter login using oauth.
I have problem to get the request_token folowing the link:
https://dev.twitter.com/oauth/reference/post/oauth/request_token
using restsharp.portable for the request POST i arrive at this point:
public async void GetTwitterToken()
{
try
{
TwitterLogin tw = new TwitterLogin();
RestClient client = new RestClient("https://api.twitter.com");
RestRequest request = new RestRequest("/oauth/request_token", Method.POST);
client.Authenticator = OAuth1Authenticator.ForRequestToken(tw.oauth_consumer_key, tw.oauth_consumer_secret);
IRestResponse response = await client.Execute(request);
}
catch (Exception e)
{
}
}
Parameter "response" it's ok but i'don't know how to parse to get token (it's not json).
i have seen this example:
public void GetRequestToken()
{
var client = new RestClient("https://api.twitter.com"); // Note NO /1
client.Authenticator = OAuth1Authenticator.ForRequestToken(
_consumerKey,
_consumerSecret,
"http://markashleybell.com" // Value for the oauth_callback parameter
);
var request = new RestRequest("/oauth/request_token", Method.POST);
var response = client.Execute(request);
var qs = HttpUtility.ParseQueryString(response.Content);
_token = qs["oauth_token"];
_tokenSecret = qs["oauth_token_secret"];
}
But i don't have HttpUtility.ParseQueryString(response.Content) whith xamarin.form framework
I need to modify requested content to replace some characters (because of some unicode problems). Previously (in ASP.NET MVC), I did this with HttpModules; but in WebApi, it seems that I should DelegatingHandler but it is totally different.
How can I modify request.Content inside the SendAsync method? I need something like this:
protected async override Task<HttpResponseMessage> SendAsync(
HttpRequestMessage request, CancellationToken cancellationToken)
{
var s = await request.Content.ReadAsStringAsync();
// do some modification on "s"
s= s.replace("x","y");
request.Content = new StringContent(s);
var response = await base.SendAsync(request, cancellationToken);
return response;
}
In the code above, I think I should check the request's content type and then decide what to do. If yes, which checks should I do?
I did something like this in SendAsync. Although it is not a comprehensive solution, it works:
//first : correct the URI (querysting data) first
request.RequestUri = new Uri(Correcr(request.RequestUri.ToString()));
var contentType = request.Content.Headers.ContentType;
if (contentType != null)
{
if (contentType.MediaType == "application/x-www-form-urlencoded")//post,put,... & other non-json requests
{
var formData = await request.Content.ReadAsFormDataAsync();
request.Content = new FormUrlEncodedContent(Correct(formData));
}
else if (contentType.MediaType == "multipart/form-data")//file upload , so ignre it
{
var formData = await request.Content.ReadAsFormDataAsync();
request.Content = new FormUrlEncodedContent(Correct(formData));
}
else if (contentType.MediaType == "application/json")//json request
{
var oldHeaders = request.Content.Headers;
var formData = await request.Content.ReadAsStringAsync();
request.Content = new StringContent(Correct(formData));
ReplaceHeaders(request.Content.Headers, oldHeaders);
}
else
throw new Exception("Implement It!");
}
return await base.SendAsync(request, cancellationToken);
and this helper function:
private void ReplaceHeaders(HttpContentHeaders currentHeaders, HttpContentHeaders oldHeaders)
{
currentHeaders.Clear();
foreach (var item in oldHeaders)
currentHeaders.Add(item.Key, item.Value);
}