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using Google.Protobuf;
using Newtonsoft.Json;
using Newtonsoft.Json.Linq;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Net.Http;
using System.Net.Http.Headers;
using System.Security.Authentication;
using System.Text;
using System.Threading.Tasks;
using System.Web;
using Tango.PMR.Synchronization;
namespace Tango.Transport.Web
{
public class WebTransportClient : IWebTransportClient
{
private HttpClient _httpClient;
private static JsonSerializerSettings _settings;
public string AuthenticationToken { get; set; }
public TimeSpan RequestTimeout
{
get { return _httpClient.Timeout; }
set { _httpClient.Timeout = value; }
}
static WebTransportClient()
{
_settings = new JsonSerializerSettings()
{
};
}
public WebTransportClient()
{
_httpClient = new HttpClient();
}
public WebTransportClient(String authenticationToken) : this()
{
AuthenticationToken = authenticationToken;
}
public Task<Response> PostProto<Request, Response>(String url, Request request) where Request : class, IMessage where Response : class, IMessage
{
return Task.Factory.StartNew<Response>(() =>
{
var req = new ByteArrayContent(request.ToByteArray());
req.Headers.Add("Content-Type", "application/x-protobuf");
if (AuthenticationToken != null)
{
_httpClient.DefaultRequestHeaders.Authorization = new AuthenticationHeaderValue("Bearer", AuthenticationToken);
}
else
{
_httpClient.DefaultRequestHeaders.Authorization = null;
}
var response = _httpClient.PostAsync(url, req).Result;
var data = response.Content.ReadAsByteArrayAsync().Result;
if (response.StatusCode != System.Net.HttpStatusCode.OK)
{
HttpProtoException exception = HttpProtoException.Parser.ParseFrom(data);
throw new HttpException(exception.StatusCode, exception.Message);
}
Response dummy = Activator.CreateInstance<Response>() as Response;
return dummy.GetParser().ParseFrom(data) as Response;
});
}
public Task<Response> PostJson<Request, Response>(string url, Request request) where Request : class, IWebRequestMessage where Response : class, IWebResponseMessage
{
return Task.Factory.StartNew<Response>(() =>
{
var req = new ByteArrayContent(Encoding.UTF8.GetBytes(JsonConvert.SerializeObject(request, _settings)));
req.Headers.Add("Content-Type", "application/json");
if (AuthenticationToken != null)
{
_httpClient.DefaultRequestHeaders.Authorization = new AuthenticationHeaderValue("Bearer", AuthenticationToken);
}
else
{
_httpClient.DefaultRequestHeaders.Authorization = null;
}
var response = _httpClient.PostAsync(url, req).Result;
var data = response.Content.ReadAsStringAsync().Result;
try
{
response.EnsureSuccessStatusCode();
}
catch (HttpRequestException ex)
{
bool handled = false;
try
{
String message = JObject.Parse(data).GetValue("Message").ToString();
Exception exception = null;
try
{
String exceptionMessage = JObject.Parse(data).GetValue("ExceptionMessage").ToString();
String exceptionType = JObject.Parse(data).GetValue("ExceptionType").ToString();
String stackTrace = JObject.Parse(data).GetValue("StackTrace").ToString();
Type type = GetType(exceptionType);
if (type != null)
{
exception = Activator.CreateInstance(type, new object[] { exceptionMessage + "\n" + stackTrace }) as Exception;
}
else
{
exception = new HttpException(exceptionMessage + "\n" + stackTrace);
}
}
catch
{
if (message == null)
{
Logging.LogManager.Default.Log($"Error parsing response message!\n{data}");
}
throw new HttpRequestException(ex.Message + " " + message);
}
handled = true;
throw exception;
}
catch (Exception handledException)
{
if (handled)
{
throw handledException;
}
else
{
throw ex;
}
}
}
return JsonConvert.DeserializeObject<Response>(data);
});
}
private static Type GetType(string typeName)
{
var type = Type.GetType(typeName);
if (type != null) return type;
foreach (var a in AppDomain.CurrentDomain.GetAssemblies())
{
type = a.GetType(typeName);
if (type != null)
return type;
}
return null;
}
public void Dispose()
{
_httpClient.Dispose();
}
}
}
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