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[英]Send std::vector<float> over TCP, from boost::asio to QTcpSocket
[英]Boost ASIO - Unable to send message over TCP
我正在使用 Boost ASIO 進行 TCP 網絡通信。 這是我的代碼:
Server.h
:
#ifndef VIBRANIUM_CORE_SERVER_H
#define VIBRANIUM_CORE_SERVER_H
#include <cstdlib>
#include <iostream>
#include <memory>
#include <utility>
#include <boost/asio.hpp>
#include <deque>
#include "Logger.h"
#include "Client.h"
#include "Protocol/ServerOpcode.h"
using boost::asio::ip::tcp;
namespace Vibranium {
class Server {
public:
Server(boost::asio::io_service &io_service, short port)
: acceptor_(io_service, tcp::endpoint(tcp::v4(), port)),
socket_(io_service) {
do_accept();
Logger::Log("Server Started! Listening on Port("+std::to_string(port)+")", Logger::Success, true);
}
static std::deque<std::shared_ptr<Client>> Clients;
private:
void do_accept();
int incrementor;
tcp::acceptor acceptor_;
tcp::socket socket_;
};
}
#endif //VIBRANIUM_CORE_SERVER_H
Server.cpp
:
#include "Server.h"
#include "Client.h"
using namespace Vibranium;
std::deque<std::shared_ptr<Client>> Server::Clients;
void Server::do_accept()
{
acceptor_.async_accept(socket_,
[this](boost::system::error_code ec)
{
if (!ec)
{
incrementor++;
Logger::Log("New Connection (ID: " + std::to_string(incrementor) + ")",Logger::Success);
std::shared_ptr<Client> c = std::make_shared<Client>(std::move(socket_));
c->start();
c->connectionId = incrementor;
Server::Clients.push_back(c);
}
do_accept();
});
}
Client.h
:
#ifndef VIBRANIUM_CORE_CLIENT_H
#define VIBRANIUM_CORE_CLIENT_H
#include <cstdlib>
#include <iostream>
#include <memory>
#include <utility>
#include <boost/asio.hpp>
#include "Protocol/ServerOpcode.h"
using boost::asio::ip::tcp;
namespace Vibranium{
class Client: public std::enable_shared_from_this<Client>
{
public:
Client(tcp::socket socket)
: socket(std::move(socket))
{
}
void start();
int connectionId;
tcp::socket socket;
void Send(ServerOpcode serverOpcode, const std::string& message);
private:
void do_read();
void do_write(std::size_t length);
enum { max_length = 1024 };
char data_[max_length];
};
}
#endif //VIBRANIUM_CORE_CLIENT_H
Client.cpp
:
#include "Client.h"
#include "Server.h"
void Vibranium::Client::start() {
do_read();
}
void Vibranium::Client::do_read() {
auto self(shared_from_this());
socket.async_read_some(boost::asio::buffer(data_, max_length),
[this, self](boost::system::error_code ec, std::size_t length)
{
if ((boost::asio::error::eof == ec) || (boost::asio::error::connection_reset == ec))
{
Logger::Log("Disconnected ID: " + std::to_string(connectionId),Logger::Error, true);
for (int i = 0; i < Server::Clients.size(); ++i) {
if(Server::Clients[i]->connectionId == connectionId)
Server::Clients.erase(Server::Clients.begin()+i);
}
}
else
{
std::cout.write(data_, length);
std::cout << "\n";
//do_write(length);
Send(ServerOpcode::SMSG_AUTH_CONNECTION_RESPONSE,"How are you, mate?");
}
});
}
void Vibranium::Client::do_write(std::size_t length) {
auto self(shared_from_this());
boost::asio::async_write(socket, boost::asio::buffer(data_, length),
[this, self](boost::system::error_code ec, std::size_t /*length*/)
{
if (!ec)
{
do_read();
}
});
}
void Vibranium::Client::Send(ServerOpcode serverOpcode, const std::string& message) {
auto self(shared_from_this());
std::cout << "HERE!" << std::endl;
size_t request_length = std::strlen(message.c_str());
boost::asio::async_write(socket, boost::asio::buffer(message.c_str(), request_length),
[this, self](boost::system::error_code ec, std::size_t /*length*/)
{
if (!ec)
do_read();
else
Logger::Log("Message sent failed to " + std::to_string(connectionId),Logger::Error);
});
}
這是我模擬到服務器的多個連接的方法:
Config config("AuthServer");
std::string defaultIP = "127.0.0.1";
std::string defaultPort = "8080";
int connectionsNumber = CommandQuestion<int>::AskQuestion("How many connections do you want established?");
std::cout << "Initializing " << std::to_string(connectionsNumber) << " connection/s." << std::endl;
std::cout << "Trying to connect to " << defaultIP << " on port: " << config.GetConfigValue("AuthServerPort", defaultPort) << std::endl;
boost::asio::io_context io_context;
std::vector<tcp::socket> sockets;
for (int i = 0; i < connectionsNumber; ++i) {
try
{
sockets.emplace_back(io_context);
tcp::socket& s{sockets.back()};
tcp::resolver resolver(io_context);
boost::asio::connect(s, resolver.resolve( defaultIP,config.GetConfigValue("AuthServerPort", defaultPort)));
std::string message = "I am testing here!!!";
size_t request_length = std::strlen(message.c_str());
boost::asio::write(s, boost::asio::buffer(message, request_length));
char reply[max_length];
size_t reply_length = boost::asio::read(s,boost::asio::buffer(reply, request_length));
Logger::Log(std::to_string(i) + " Connected!",Logger::Success);
std::cout << "Reply is: ";
std::cout.write(reply, reply_length);
std::cout << "\n";
}
catch (std::exception& e)
{
std::cerr << "Exception: " << e.what() << "\n";
}
}
所以基本上我正在建立連接,然后客戶端向服務器發送一條消息,說I am testing here!!!
比我想使用我的功能Send
發送回客戶端另一條消息How are you, mate?
.
但是它不起作用。 似乎無法從客戶端看到該消息。 在服務器端,我看到HERE!
的輸出HERE!
它位於Send
功能中。 這意味着我達到了那個點。
另一方面,如果我取消注釋//do_write(length);
從函數do_read()
並評論回send()
似乎返回了I am testing here!!!
的消息I am testing here!!!
. 所以根據我的理解,溝通是這樣工作的。
我的問題是我的Send
功能錯誤在哪里? 為什么我不能讓它發送另一條消息,而不僅僅是回復客戶端首先發送的消息。
我發現自己的錯誤在哪里,這是我解決它的方法:
void Vibranium::Client::Send(ServerOpcode serverOpcode, const std::string& message) {
auto self(shared_from_this());
std::cout << "HERE!" << std::endl;
strcpy(data_, message.c_str());
size_t request_length = sizeof(data_)/sizeof(*data_);
boost::asio::async_write(socket, boost::asio::buffer(data_, request_length),
[this, self](boost::system::error_code ec, std::size_t /*length*/)
{
if (ec)
Logger::Log("Message sent failed to " + std::to_string(connectionId),Logger::Error);
});
}
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