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command_client.cpp
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174 lines (143 loc) · 4.05 KB
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#define NOMINMAX
#include <winsock2.h>
#include <ws2tcpip.h>
#include <windows.h>
#include <atomic>
#include <cstdint>
#include <iostream>
#include <string>
#include <thread>
#include <vector>
#pragma comment(lib, "Ws2_32.lib")
static std::atomic<bool> g_running{ true };
static BOOL WINAPI ConsoleCtrlHandler(DWORD ctrlType)
{
switch (ctrlType)
{
case CTRL_C_EVENT:
case CTRL_BREAK_EVENT:
case CTRL_CLOSE_EVENT:
case CTRL_SHUTDOWN_EVENT:
g_running.store(false);
return TRUE;
default:
return FALSE;
}
}
static bool SendAll(SOCKET s, const char* data, int len)
{
while (len > 0 && g_running.load())
{
int sent = ::send(s, data, len, 0);
if (sent <= 0) return false;
data += sent;
len -= sent;
}
return (len == 0);
}
static SOCKET ConnectLoop(const char* host, uint16_t port, int retryMs)
{
sockaddr_in addr{};
addr.sin_family = AF_INET;
addr.sin_port = htons(port);
inet_pton(AF_INET, host, &addr.sin_addr);
while (g_running.load())
{
SOCKET s = ::socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);
if (s == INVALID_SOCKET)
{
Sleep(retryMs);
continue;
}
if (::connect(s, (sockaddr*)&addr, sizeof(addr)) == SOCKET_ERROR)
{
closesocket(s);
std::cerr << "Waiting for server " << host << ":" << port << " ...\n";
Sleep(retryMs);
continue;
}
std::cerr << "Connected to " << host << ":" << port << "\n";
return s;
}
return INVALID_SOCKET;
}
static void ReceiverThread(SOCKET s, std::atomic<bool>& connected)
{
std::string buffer;
buffer.reserve(4096);
std::vector<char> tmp(1024);
while (g_running.load() && connected.load())
{
int n = ::recv(s, tmp.data(), (int)tmp.size(), 0);
if (n <= 0)
{
connected.store(false);
break;
}
buffer.append(tmp.data(), tmp.data() + n);
// Print complete lines
for (;;)
{
size_t nl = buffer.find('\n');
if (nl == std::string::npos) break;
std::string line = buffer.substr(0, nl + 1);
buffer.erase(0, nl + 1);
// Trim CR/LF for printing
while (!line.empty() && (line.back() == '\n' || line.back() == '\r')) line.pop_back();
if (!line.empty())
std::cout << "[server] " << line << "\n";
}
if (buffer.size() > (1u << 20))
buffer.clear();
}
}
int main(int argc, char** argv)
{
const char* host = "127.0.0.1";
uint16_t port = 7777;
if (argc >= 2) port = (uint16_t)std::stoi(argv[1]);
SetConsoleCtrlHandler(ConsoleCtrlHandler, TRUE);
WSADATA wsa{};
if (WSAStartup(MAKEWORD(2, 2), &wsa) != 0)
{
std::cerr << "WSAStartup failed\n";
return 1;
}
std::cerr << "Type commands. Use /quit or /exit to stop. Ctrl+C also works.\n";
while (g_running.load())
{
SOCKET s = ConnectLoop(host, port, 500);
if (!g_running.load() || s == INVALID_SOCKET) break;
std::atomic<bool> connected{ true };
std::thread rx(ReceiverThread, s, std::ref(connected));
std::string line;
while (g_running.load() && connected.load())
{
if (!std::getline(std::cin, line))
{
g_running.store(false);
break;
}
if (line == "/quit" || line == "/exit")
{
g_running.store(false);
break;
}
line.push_back('\n');
if (!SendAll(s, line.data(), (int)line.size()))
{
connected.store(false);
break;
}
}
// Cleanup this connection
shutdown(s, SD_BOTH);
closesocket(s);
connected.store(false);
if (rx.joinable()) rx.join();
if (g_running.load())
std::cerr << "Disconnected. Reconnecting...\n";
}
WSACleanup();
return 0;
}