Andrew
113 lines
4.1 KiB
C#
113 lines
4.1 KiB
C#
/*
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* QUANTCONNECT.COM - Democratizing Finance, Empowering Individuals.
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* Lean Algorithmic Trading Engine v2.0. Copyright 2014 QuantConnect Corporation.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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using System;
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using System.Collections.Specialized;
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using System.Net;
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using Newtonsoft.Json;
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using QuantConnect.Configuration;
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using QuantConnect.Logging;
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using QuantConnect.Packets;
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using RestSharp;
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namespace QuantConnect.Messaging
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{
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/// <summary>
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/// Provides a common transmit method for utilizing the QC streaming API
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/// </summary>
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public static class StreamingApi
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{
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/// <summary>
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/// Gets a flag indicating whether or not the streaming api is enabled
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/// </summary>
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public static readonly bool IsEnabled = Config.GetBool("send-via-api");
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// Client for sending asynchronous requests.
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private static readonly RestClient Client = new RestClient("http://streaming.quantconnect.com")
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{
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Timeout = 300000
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};
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/// <summary>
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/// Send a message to the QuantConnect Chart Streaming API.
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/// </summary>
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/// <param name="userId">User Id</param>
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/// <param name="apiToken">API token for authentication</param>
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/// <param name="packet">Packet to transmit</param>
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public static void Transmit(int userId, string apiToken, Packet packet)
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{
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try
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{
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var tx = JsonConvert.SerializeObject(packet);
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if (tx.Length > 10000)
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{
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Log.Trace("StreamingApi.Transmit(): Packet too long: " + packet.GetType());
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return;
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}
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if (userId == 0)
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{
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Log.Error("StreamingApi.Transmit(): UserId is not set. Check your config.json file 'job-user-id' property.");
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return;
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}
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if (apiToken == "")
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{
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Log.Error("StreamingApi.Transmit(): API Access token not set. Check your config.json file 'api-access-token' property.");
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return;
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}
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var request = new RestRequest();
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request.AddParameter("uid", userId);
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request.AddParameter("token", apiToken);
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request.AddParameter("tx", tx);
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Client.ExecuteAsyncPost(request, (response, handle) =>
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{
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try
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{
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var result = JsonConvert.DeserializeObject<Response>(response.Content);
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if (result.Type == "error")
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{
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Log.Error(new Exception(result.Message), "PacketType: " + packet.Type);
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}
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}
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catch
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{
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Log.Error("StreamingApi.Client.ExecuteAsyncPost(): Error deserializing JSON content.");
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}
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}, "POST");
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}
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catch (Exception err)
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{
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Log.Error(err, "PacketType: " + packet.Type);
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}
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}
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/// <summary>
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/// Response object from the Streaming API.
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/// </summary>
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private class Response
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{
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/// <summary>
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/// Type of response from the streaming api.
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/// </summary>
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/// <remarks>success or error</remarks>
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public string Type;
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/// <summary>
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/// Message description of the error or success state.
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/// </summary>
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public string Message;
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}
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}
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} |