Lightstreamer 创建会话

Posted 2023-03-31

【中文标题】Lightstreamer 创建会话

【英文标题】：Lightstreamer create a session

【发布时间】：2016-01-24 01:33:23

【问题描述】：

我正在尝试使用 LightStreamer 连接到 IG 索引流 API，并且正在编写本教程 http://www.lightstreamer.com/docs/client_generic_base/Network%20Protocol%20Tutorial.pdf

我已通过执行以下操作成功创建了流式会话（第 16 页 4.1 - /lightstreamer/create_session.txt）：

public void ConnectToLightStreamer(Credentials credentials)

    var LightStreamerRequest = (HttpWebRequest)WebRequest.Create(credentials.LIGHTSTREAMERENDPOINT + "/lightstreamer/create_session.txt");
    LightStreamerRequest.Method = "POST";
    LightStreamerRequest.ContentType = "application/x-www-form-urlencoded";
    LightStreamerRequest.Headers.Add("Cache-Control", "no-cache");

    using (var streamWriter = new StreamWriter(LightStreamerRequest.GetRequestStream()))
    
        string Body = "LS_user=" + credentials.CLIENTID + "&LS_password=CST-" + credentials.CST + "|XST-" + credentials.SECURITY_TOKEN + "&LS_adapter_set=DEFAULT&LS_polling=true&LS_polling_millis=0&LS_idle_millis=0&LS_report_info=true";

        streamWriter.Write(Body);
        streamWriter.Flush();
        streamWriter.Close();
    

    var httpResponse = (HttpWebResponse)LightStreamerRequest.GetResponse();
    Stream stream = httpResponse.GetResponseStream();

    using (stream)
    
        StreamReader reader = new StreamReader(stream, Encoding.UTF8);
        string responseString = reader.ReadToEnd();

        string[] SessionData = responseString.Split(new string[]  Environment.NewLine , StringSplitOptions.None);

        string[] sessionID = SessionData[1].Split(':');
        credentials.SESSIONID = sessionID[1];

        string[] controlAddress = SessionData[2].Split(':');
        credentials.CONTROLADDRESS = controlAddress[1];

        Console.WriteLine(responseString);
        Console.WriteLine("CONNECTED");
        Console.WriteLine(Environment.NewLine);
        Console.WriteLine(Environment.NewLine);                
    

通过执行以下操作，我成功地绑定了会话（第 18/19 页，/lightstreamer/bind_session.txt）：

 public void BindSession(Credentials credentials)

    var LightStreamerRequest = (HttpWebRequest)WebRequest.Create(credentials.LIGHTSTREAMERENDPOINT + "/lightstreamer/bind_session.txt");
    LightStreamerRequest.Method = "POST";
    LightStreamerRequest.ContentType = "application/x-www-form-urlencoded";
    LightStreamerRequest.Headers.Add("Cache-Control", "no-cache");

    using (var streamWriter = new StreamWriter(LightStreamerRequest.GetRequestStream()))
    

        string Body = "LS_user=" + credentials.CLIENTID + "&LS_session=" + credentials.SESSIONID + "&LS_password=CST-" + credentials.CST + "|XST-" + credentials.SECURITY_TOKEN + "&LS_adapter_set=DEFAULT&LS_polling=true&LS_polling_millis=0&LS_idle_millis=0&LS_report_info=true&LS_polling_millis=1000";

        streamWriter.Write(Body);
        streamWriter.Flush();
        streamWriter.Close();
    

    var httpResponse = (HttpWebResponse)LightStreamerRequest.GetResponse();
    Stream stream = httpResponse.GetResponseStream();

    using (stream)
    
        StreamReader reader = new StreamReader(stream, Encoding.UTF8);

        string responseString = reader.ReadToEnd();

        Console.WriteLine("BIND: " + responseString);
    

我的问题是我正在创建一个会话，并确定我应该发送哪些信息以及如何发送。第 20/21 页 /lightstreamer/control.txt。

我有以下信息，但我知道这是错误的，因为我没有收到任何回复：

public void ControlStreamer(Credentials credentials)

    var LightStreamerRequest = (HttpWebRequest)WebRequest.Create(credentials.LIGHTSTREAMERENDPOINT + "/lightstreamer/control.txt");
    LightStreamerRequest.Method = "POST";
    LightStreamerRequest.ContentType = "application/x-www-form-urlencoded";
    LightStreamerRequest.Headers.Add("Cache-Control", "no-cache");

    using (var streamWriter = new StreamWriter(LightStreamerRequest.GetRequestStream()))
    

        string Body = "LS_user=" + credentials.CLIENTID + "&LS_password=CST-" + credentials.CST + "|XST-" + credentials.SECURITY_TOKEN + "&LS_session=" + credentials.SESSIONID + "&LS_polling=true&LS_polling_millis=0&LS_idle_millis=0&LS_report_info=true&LS_polling_millis=1000&LS_table=" + credentials.SESSIONID + "&LS_op=add&LS_schema=MARKET:IX.D.DOW.DAILY.IP&LS_id=1&LS_mode=MERGE";

        streamWriter.Write(Body);
        streamWriter.Flush();
        streamWriter.Close();
    

    var httpResponse = (HttpWebResponse)LightStreamerRequest.GetResponse();
    Stream stream = httpResponse.GetResponseStream();

    using (stream)
    
        StreamReader reader = new StreamReader(stream, Encoding.UTF8);

        string responseString = reader.ReadToEnd();

        Console.WriteLine("CONTROL: " + responseString);
    

我已经做了大约一年的全职开发人员，这个项目正处于我的极限和理解的边缘。

我已经做这个项目 2 天 +，但几乎看不懂文档。

如果有人能够向我解释我做错了什么，或者指出一个可行的例子，我将非常感激。

【参考方案1】：

如果你的应用是基于C#的，你不需要自己实现协议，但是如果你使用现成的客户端库会好很多。它为您提供更高级别的抽象，并且更加健壮且经过良好测试。

您可以从https://labs.ig.com/lightstreamer-downloads 下载客户端库并访问完整的文档和示例

您提到的网络协议教程仅在您需要基于任何可用 Lightstreamer 客户端库未涵盖的技术开发应用程序时才有用。