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HttpClient (Windows.Web.Http) working with cookies

I am working on a Windows app and am having some issues with cookies. Please note that I am working with Windows.Web.Http, not the System namespace HttpClient.
The API I'm working with uses an auth-header for authentication. Basically after a POST to login, I need a way to get the cookies returned and then use those cookies to perform the subsequent API calls. I posted an example of what I currently have, which succeeds. I can see the cookies in the result object. I'm just not entirely sure where to go from here / how to proceed. Thanks! Any ideas?
using MyApi.Interfaces;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using Windows.Web.Http;
using Newtonsoft.Json;
using MyApi.Models.Auth;
using MyApi.Models;
namespace MyApi
{
public class MyService
{
private const string MyBaseUrl = "http://api.my.com:3000";
private readonly HttpClient _httpClient = new HttpClient();
public async Task<SignInResponse> AttemptLogin(string username, string password)
{
if (string.IsNullOrEmpty(username) || string.IsNullOrEmpty(password))
throw new ArgumentException("Username or password is null or empty");
var uri = new Uri(string.Format("{0}/{1}", MyBaseUrl, "auth/signin"));
var authSignIn = new Models.Auth.SignInRequest();
authSignIn.Email = username;
authSignIn.Password = password;
var myObject = JsonConvert.SerializeObject(authSignIn);
// I see the headers in the result object, but I'm not
// sure the best way to a) get them out and b) shove them into
// all of the next calls
var result = await _httpClient.PostAsync(uri,
new HttpStringContent(myObject.ToString(),
Windows.Storage.Streams.UnicodeEncoding.Utf8,
"application/json"));
var content = await result.Content.ReadAsStringAsync();
var successResponse = new SignInResponse();
try
{
successResponse = JsonConvert.DeserializeObject<SignInResponse>(content);
}
catch (Exception)
{
var failResponse = JsonConvert.DeserializeObject<ErrorResponse>(content);
throw new Exception(failResponse.message);
}
return successResponse;
}
}
}

You can use HttpBaseProtocolFilter.CookieManager, e.g.:
var filter = new HttpBaseProtocolFilter();
var cookieManager = filter.CookieManager;
var uri = new Uri("http://api.my.com:3000");
foreach (var cookie in cookieManager.GetCookies(uri))
{
Debug.WriteLine(cookie.Name);
Debug.WriteLine(cookie.Value);
}
Notice, if the cookies are already in the HttpCookieContainer, the cookies will be automatically added in the next requests to http://api.my.com:3000, and no action is required from your side.
If you want to modify them or delete them, the HttpCookieContainer has methods to do that.

Take a look at Flurl. It presents a fluent interface over the Http bits, so you can say something like this to authenticate and reuse the connection with the cookies:
using (var fc = new FlurlClient().EnableCookies())
{
var url = new Url( "http://api.com/endpoint" ) ;
await url
.AppendPathSegment("login")
.WithClient(fc)
.PostUrlEncodedAsync(new { user = "user", pass = "pass" });
var page = await url
.AppendPathSegment("home")
.WithClient(fc)
.GetStringAsync();
// Need to inspect the cookies? FlurlClient exposes them as a dictionary.
var sessionId = fc.Cookies["session_id"].Value;
}

How to create VMs using google compute engine REST API

I am new to Google Compute Engine. Some one please help me with creating Google Compute Engine VMs programmatically using REST APIs in C#.

Here [1] you can found the API documentation to create an instance and at the bottom of the document the C# examples [2]:
using Google.Apis.Auth.OAuth2;
using Google.Apis.Compute.v1;
using Google.Apis.Services;
using Newtonsoft.Json;
using System;
using System.Threading.Tasks;
using Data = Google.Apis.Compute.v1.Data;
namespace ComputeSample
{
public class ComputeExample
{
public static void Main(string[] args)
{
ComputeService computeService = new ComputeService(new BaseClientService.Initializer
{
HttpClientInitializer = GetCredential(),
ApplicationName = "Google-ComputeSample/0.1",
});
// Project ID for this request.
string project = "my-project"; // TODO: Update placeholder value.
// The name of the zone for this request.
string zone = "my-zone"; // TODO: Update placeholder value.
// TODO: Assign values to desired properties of `requestBody`:
Data.Instance requestBody = new Data.Instance();
InstancesResource.InsertRequest request = computeService.Instances.Insert(requestBody, project, zone);
// To execute asynchronously in an async method, replace `request.Execute()` as shown:
Data.Operation response = request.Execute();
// Data.Operation response = await request.ExecuteAsync();
// TODO: Change code below to process the `response` object:
Console.WriteLine(JsonConvert.SerializeObject(response));
}
public static GoogleCredential GetCredential()
{
GoogleCredential credential = Task.Run(() => GoogleCredential.GetApplicationDefaultAsync()).Result;
if (credential.IsCreateScopedRequired)
{
credential = credential.CreateScoped("https://www.googleapis.com/auth/cloud-platform");
}
return credential;
}
}
}
[1] https://cloud.google.com/compute/docs/reference/rest/v1/instances/insert
[2] https://cloud.google.com/compute/docs/reference/rest/v1/instances/insert#examples

Amazon Product advertising c# api

Hi guys I'm having trouble fetching products from amazon web api.
I have used this code from the internet, adding all the neccessary references. I tried adding a view and chose itemsearchresponce as the model class but it does not display the product, I get the following error:
Unable to generate a temporary class (result=1).
error CS0029: Cannot implicitly convert type 'AmazonProduct.com.amazon.webservices.ImageSet' to
'AmazonProduct.com.amazon.webservices.ImageSet[]'
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.Mvc;
using AmazonProduct.com.amazon.webservices;
namespace Forest.Controllers
{
public class AmazonController : Controller
{
private AmazonProduct.com.amazon.webservices.AWSECommerceService _Products;
public AmazonController()
{
_Products = new AmazonProduct.com.amazon.webservices.AWSECommerceService();
}
[HttpGet]
public ActionResult listProducts()
{
var searchIndex = "Shoes";
var keywords = "jordan";
// Create an ItemSearch wrapper
ItemSearch search = new ItemSearch();
search.AssociateTag = "[Your Associate ID]";
search.AWSAccessKeyId = "MyKey";
// search.Version= "2011-08-01";
// Create a request object
ItemSearchRequest request = new ItemSearchRequest();
// Fill the request object with request parameters
request.ResponseGroup = new string[] { "ItemAttributes" };
// Set SearchIndex and Keywords
request.SearchIndex = searchIndex;
request.Keywords = keywords;
// Set the request on the search wrapper
search.Request = new ItemSearchRequest[] { request };
ItemSearchResponse response = _Products.ItemSearch(search);
return View(response);
}
}
}

Go to the generated proxy and replace ImageSet[][] with ImageSet[].
Also take a look at Amazon Product Advertising API C# if you already haven't.

Why is Page_Load fired a second time after RequestUserAuthorization?

I'm testing the "OAuth/OAuth2/OAuthClient/Facebook.aspx" file from the DotNetOpenAuth.Samples solution.
here is the code (Simple authentication from Facebook directly in the PageLoad) :
namespace OAuthClient {
using System;
using System.Configuration;
using System.Net;
using System.Web;
using DotNetOpenAuth.ApplicationBlock;
using DotNetOpenAuth.ApplicationBlock.Facebook;
using DotNetOpenAuth.OAuth2;
public partial class Facebook : System.Web.UI.Page {
private static readonly FacebookClient client = new FacebookClient {
ClientIdentifier = ConfigurationManager.AppSettings["facebookAppID"],
ClientCredentialApplicator = ClientCredentialApplicator.PostParameter(ConfigurationManager.AppSettings["facebookAppSecret"]),
};
protected void Page_Load(object sender, EventArgs e)
{
IAuthorizationState authorization = client.ProcessUserAuthorization();
if (authorization == null)
{
// Kick off authorization request
client.RequestUserAuthorization();
}
else
{
var request = WebRequest.Create("https://graph.facebook.com/me?access_token=" + Uri.EscapeDataString(authorization.AccessToken));
using (var response = request.GetResponse())
{
using (var responseStream = response.GetResponseStream())
{
var graph = FacebookGraph.Deserialize(responseStream);
this.nameLabel.Text = HttpUtility.HtmlEncode(graph.Name);
}
}
}
}
}
}
When the Page_Load is firing for the first time, authorization == null, so the client.RequestUserAuthorization(); call is executed, and then, Page_load is firing a second time.
Why ? I don't understand the mecanism.
I used fiddler to sniff the response sent back by facebook after "client.RequestUserAuthorization()", but it's always an empty body.
My final goal is to launch the authenfication process from a button. But when the "client.RequestUserAuthorization();" call is executed within a button, nothing is fired a second time... so authorization is always null.

Invalid Response Error when Retrieving Google Analytics Data with a Service Account in C# .NET

I'm trying to write an online application to access my google analytics data using a google service account. Here's my code:
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
namespace GA_server2server_POC.Models
{
using System.Security.Cryptography.X509Certificates;
using Google.Apis.Analytics.v3;
using Google.Apis.Analytics.v3.Data;
using Google.Apis.Authentication.OAuth2;
using Google.Apis.Authentication.OAuth2.DotNetOpenAuth;
using Google.Apis.Util;
using Google.Apis.Services;
using Google.Apis.Requests;
public class Oauth_With_API
{
public static void ApiTest()
{
log4net.Config.XmlConfigurator.Configure();
const string ServiceAccountId = "xxxxxxxxxxxxxxxxxxxxxxxxxxx.apps.googleusercontent.com";
const string ServiceAccountUser = "xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxdeveloper.gserviceaccount.com";
AssertionFlowClient client = new AssertionFlowClient(
GoogleAuthenticationServer.Description, new X509Certificate2("C:\\Users\\rcarter\\Downloads\\xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx-privatekey.p12", "notasecret", X509KeyStorageFlags.Exportable))
{
Scope = "https://www.googleapis.com/auth/analytics.readonly",
ServiceAccountId = ServiceAccountUser
};
OAuth2Authenticator<AssertionFlowClient> authenticator = new OAuth2Authenticator<AssertionFlowClient>(client, AssertionFlowClient.GetState);
AnalyticsService service = new AnalyticsService(new BaseClientService.Initializer()
{
Authenticator = authenticator
});
string profileId = "ga:xxxxxxxx";
string startDate = "2013-07-01";
string endDate = "2013-07-15";
string metrics = "ga:visits";
DataResource.GaResource.GetRequest request = service.Data.Ga.Get(profileId, startDate, endDate, metrics);
request.Dimensions = "ga:date";
GaData data = request.Execute(); //error occurs here. After this, thread exits.
Console.WriteLine(data.TotalResults);
}
}
}
So far my code executes, but I get the following output:
WebDev.WebServer40.exe Information: 0 : DotNetOpenAuth, Version=4.0.0.11165, Culture=neutral, PublicKeyToken=2780ccd10d57b246 (official)
WebDev.WebServer40.exe Information: 0 : Preparing to send AssertionFlowMessage (2.0) message.
WebDev.WebServer40.exe Information: 0 : Sending AssertionFlowMessage request.
WebDev.WebServer40.exe Information: 0 : HTTP POST https://accounts.google.com/o/oauth2/token
WebDev.WebServer40.exe Information: 0 : The following required parameters were missing from the DotNetOpenAuth.OAuth2.Messages.AccessTokenFailedResponse message: {error,
}
WebDev.WebServer40.exe Information: 0 : Received UnauthorizedResponse response.
After this, the thread exits, and the program refuses to print any of the data. The trouble seems to occur at request.Execute();. The part that I find especially confusing, is that if I put a breakpoint on Console.WriteLine(data.TotalResults);, I can see the data I want in the local variable data. It contains everything I want to print, but I can't identify the cause of the error keeping it from doing anything after request.Execute();. After much searching, I haven't found much at all about the error listed above.
The code I'm using is based on the answer given to this question here. A few things have changed in the google analytics libraries since that question was answered, but much of my code is the same.
I've checked and re-checked all the account-specific variables. To test this, I'm running it on my local machine as a ASP.NET MVC 4 Web App.
Any help or advice on how to troubleshoot this issue is appreciated. Please let me know if I can provide more information which might help. Thanks for reading.

Try following one
using System.Security.Cryptography.X509Certificates;
using DotNetOpenAuth.OAuth2;
using Google.Apis.Analytics.v3;
using Google.Apis.Analytics.v3.Data;
using Google.Apis.Authentication.OAuth2;
using Google.Apis.Authentication.OAuth2.DotNetOpenAuth;
using Google.Apis.Services;
private void TestMethod()
{
try
{
string scope_url = "https://www.googleapis.com/auth/analytics.readonly";
//client_id: This is the "Email Address" one, not the "Client ID" one... oddly...
string client_id = "************-***********************#developer.gserviceaccount.com";
//key_file: This is the physical path to the key file you downloaded when you created your Service Account
string key_file = #"***************************************-privatekey.p12";
//key_pass: This is probably the password for all key files, but if you're given a different one, use that.
string key_pass = "notasecret";
AuthorizationServerDescription desc = GoogleAuthenticationServer.Description;
//key: Load up and decrypt the key
X509Certificate2 key = new X509Certificate2(key_file, key_pass, X509KeyStorageFlags.Exportable);
//client: we're using the AssertionFlowClient, because we're logging in with our certificate
AssertionFlowClient client = new AssertionFlowClient(desc, key) { ServiceAccountId = client_id, Scope = scope_url };
OAuth2Authenticator<AssertionFlowClient> auth = new OAuth2Authenticator<AssertionFlowClient>(client, AssertionFlowClient.GetState);
//gas: An instance of the AnalyticsService we can query
// AnalyticsService gas = null;// new AnalyticsService(auth);
var gas = new AnalyticsService(new BaseClientService.Initializer()
{
Authenticator = auth
});
//r: Creating our query
DataResource.GaResource.GetRequest r = gas.Data.Ga.Get("ga:*******", "2012-09-26", "2012-10-10", "ga:visitors");
//d: Execute and fetch the results of our query
GaData d = r.Fetch();
}
catch (Exception ex)
{
throw;
}
}