连接到 Poloniex Push-API

Connecting to Poloniex Push-API

我想连接到 Push API of Poloniex。在他们的页面上,他们写了以下内容:

In order to use the push API, connect to wss://api.poloniex.com and subscribe to the desired feed.

wss = WebSocket 安全 -> SSL 保护

他们还给出了 Node.js 和 Autobahn|JS 的示例:

var autobahn = require('autobahn');
var wsuri = "wss://api.poloniex.com";
var connection = new autobahn.Connection({
  url: wsuri,
  realm: "realm1"
});

connection.onopen = function (session) {
        function marketEvent (args,kwargs) {
                console.log(args);
        }
        function tickerEvent (args,kwargs) {
                console.log(args);
        }
        function trollboxEvent (args,kwargs) {
                console.log(args);
        }
        session.subscribe('BTC_XMR', marketEvent);
        session.subscribe('ticker', tickerEvent);
        session.subscribe('trollbox', trollboxEvent);
}

connection.onclose = function () {
  console.log("Websocket connection closed");
}

connection.open();

但是,我不想使用JavaScript,而是使用C++。还有一个用于 C++ 的 Autobahn-Library,称为 Autobahn|CPP. I've installed it and tried to run their subscriber example code,稍作修改(基本上只是硬编码地址和端口):

#include <autobahn/autobahn.hpp>
#include <boost/asio.hpp>
#include <iostream>
#include <memory>
#include <tuple>

void topic1(const autobahn::wamp_event& event)
{
    std::cerr << "received event: " << event.argument<uint64_t>(0) << std::endl;
}
using namespace boost;
using namespace boost::asio;
using namespace boost::asio::ip;
int main()
{
    try {

        boost::asio::io_service io;
        boost::asio::ip::tcp::socket socket(io);

        bool debug = true;
        auto session = std::make_shared<
                autobahn::wamp_session<boost::asio::ip::tcp::socket,
                boost::asio::ip::tcp::socket>>(io, socket, socket, debug);

        boost::future<void> start_future;
        boost::future<void> join_future;

        boost::asio::ip::tcp::endpoint rawsocket_endpoint( boost::asio::ip::address::from_string("173.236.42.218"), 443/*8000=standard*/);


        socket.async_connect(rawsocket_endpoint,
            [&](boost::system::error_code ec) {
                if (!ec) {
                    std::cerr << "connected to server" << std::endl;

                    start_future = session->start().then([&](boost::future<bool> started) {
                        if (started.get()) {
                            std::cerr << "session started" << std::endl;
                            join_future = session->join("realm1").then([&](boost::future<uint64_t> s) {
                                std::cerr << "joined realm: " << s.get() << std::endl;
                                session->subscribe("ticker", &topic1);
                            });
                        } else {
                            std::cerr << "failed to start session" << std::endl;
                            io.stop();
                        }
                    });
                } else {
                    std::cerr << "connect failed: " << ec.message() << std::endl;
                    io.stop();
                }
            }
        );

        std::cerr << "starting io service" << std::endl;
        io.run();
        std::cerr << "stopped io service" << std::endl;
    }
    catch (std::exception& e) {
        std::cerr << e.what() << std::endl;
        return 1;
    }

    return 0;
}

这里有几点需要说明: 我通过简单地 ping api.poloniex.com.

找到了 IP 地址 173.236.42.218

端口 443 是标准的 SSL 端口。我试过使用标准 WAMP/WebSocket 端口 8000,但服务器不接受。 80也不接受。

所以如果我启动程序,输出如下:

starting io service

connected to server

然后,什么也没有发生。所以代码肯定卡在了session_start(),这里是执行WS握手的地方,看第80行的wamp_session.ipp就可以看到。

在我看来,问题在于 API 想要使用安全连接 (wss://)。这段代码似乎没有尝试创建 SSL 加密连接,我不知道如何告诉会话我需要一个安全连接。

编辑:在this question中,作者说高速公路无法处理混合http/wamp服务器,其中升级 在使用 WebSocket 协议之前首先需要 http-request。我知道 Poloniex 使用这种混合类型,但我已经尝试使用 Autobahn|JS 访问 API 并且它工作正常,还发送了升级请求。所以也许这是一个高速公路|CPP问题?

编辑 2: 如果上述内容属实,是否可以自己发送 Http-Update-Request,甚至可以对连接进行 SSL 加密?我不确定,因为这可能会干扰图书馆。

我知道这是对您问题的较晚答复,但问题似乎是您在连接到远程服务器时没有执行 HTTP/Websocket 升级。您使用的示例代码是使用 rawsocket_endpoint 传输设置的,我猜这意味着没有 HTTP Websocket 升级或 Websocket 封装发生。我认为您的问题与 SSL 无关。

要使 Websocket 连接正常工作,您应该查看 AutobahnCPP example that makes use of Websocketpp

不,不,不 是一个迟到的回应。不管晚不晚,我相信这对您 Bobface(以及任何其他为此苦苦挣扎的人)来说可能是更直接的解决方案。我犹豫要不要公开它,因为它可能会被竞争对手使用。但是,没有竞争的生活还算什么!?无聊,就是这样。而且,我希望有人在我之前来发布这个,所以给你!成为您希望看到的变化,对吗?

下面,您将找到一个利用 websocketpp 和 autobahn|cpp 连接到 Poloniex 推送的实现 api。在这种情况下,它将接收对 BTC_ETH 的书籍所做的更新。

一般来说,这就是您如何利用 websocketpp 和 autobahn|cpp 连接到实现 WAMP 协议(​​又名类似 wss://ip-address.com:port)的安全网络套接字服务器。

干杯!

包括:

#include <autobahn/autobahn.hpp>
#include <autobahn/wamp_websocketpp_websocket_transport.hpp>
#include <websocketpp/config/asio_no_tls_client.hpp>
#include <websocketpp/client.hpp>
#include <boost/version.hpp>
#include <iostream>
#include <memory>
#include <string>
#include <tuple>

代码:

typedef websocketpp::client<websocketpp::config::asio_tls_client> client;
typedef autobahn::wamp_websocketpp_websocket_transport<websocketpp::config::asio_tls_client> websocket_transport;

try {
    //std::cerr << "Connecting to realm: " << parameters->realm() << std::endl;

    boost::asio::io_service io;
    //bool debug = parameters->debug();

    client ws_client;
    ws_client.init_asio(&io);
    ws_client.set_tls_init_handler([&](websocketpp::connection_hdl) {
        return websocketpp::lib::make_shared<boost::asio::ssl::context>(boost::asio::ssl::context::tlsv12_client);
    });
    auto transport = std::make_shared < autobahn::wamp_websocketpp_websocket_transport<websocketpp::config::asio_tls_client> >(
            ws_client, "wss://api.poloniex.com:443", true);

    // create a WAMP session that talks WAMP-RawSocket over TCP
    auto session = std::make_shared<autobahn::wamp_session>(io, true);

    transport->attach(std::static_pointer_cast<autobahn::wamp_transport_handler>(session));

    // Make sure the continuation futures we use do not run out of scope prematurely.
    // Since we are only using one thread here this can cause the io service to block
    // as a future generated by a continuation will block waiting for its promise to be
    // fulfilled when it goes out of scope. This would prevent the session from receiving
    // responses from the router.
    boost::future<void> connect_future;
    boost::future<void> start_future;
    boost::future<void> join_future;
    boost::future<void> subscribe_future;
    connect_future = transport->connect().then([&](boost::future<void> connected) {
        try {
            connected.get();
        } catch (const std::exception& e) {
            std::cerr << e.what() << std::endl;
            io.stop();
            return;
        }

        std::cerr << "transport connected" << std::endl;

        start_future = session->start().then([&](boost::future<void> started) {
            try {
                started.get();
            } catch (const std::exception& e) {
                std::cerr << e.what() << std::endl;
                io.stop();
                return;
            }

            std::cerr << "session started" << std::endl;

            join_future = session->join("realm1").then([&](boost::future<uint64_t> joined) {
                try {
                    std::cerr << "joined realm: " << joined.get() << std::endl;
                } catch (const std::exception& e) {
                    std::cerr << e.what() << std::endl;
                    io.stop();
                    return;
                }

                subscribe_future = session->subscribe("BTC_ETH", &on_topic1).then([&] (boost::future<autobahn::wamp_subscription> subscribed)
                {
                    try {
                        std::cerr << "subscribed to topic: " << subscribed.get().id() << std::endl;
                    }
                    catch (const std::exception& e) {
                        std::cerr << e.what() << std::endl;
                        io.stop();
                        return;
                    }

                });
            });
        });
    });

    std::cerr << "starting io service" << std::endl;
    io.run();
    std::cerr << "stopped io service" << std::endl;
}
catch (std::exception& e) {
    std::cerr << "exception: " << e.what() << std::endl;
    ret_var.successfully_ran = false;
    return ret_var;
}