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修改隧道

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This commit is contained in:
cxh 2026-01-21 14:58:32 +08:00
parent cd82cc0692
commit 2759f86c76
2 changed files with 259 additions and 52 deletions
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21
include/tunnel_client.hpp
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@ -2,24 +2,39 @@
#include <atomic>
#include <string>
#include <thread>
#include <websocketpp/connection.hpp>
namespace websocketpp
{
namespace client
{
}
} // namespace websocketpp
class TunnelClient
{
public:
TunnelClient(const std::string& vid, const std::string& server_ws_url, int local_http_port);
void start();
void stop();
private:
void run_loop();
std::string handle_local_http(const std::string& method, const std::string& path, const std::string& body);
// 新增：流式处理 & 安全发送
void handle_request_and_reply(const nlohmann::json& req);
void send_text_safe(const std::string& s);
void send_binary_safe(const void* data, size_t len);
private:
std::string vid_;
std::string ws_url_;
int local_port_;
int local_port_ = 0;
std::atomic<bool> running_{false};
std::thread th_;
// websocketpp 句柄
websocketpp::connection_hdl hdl_;
ws_client* client_ = nullptr; // 指向 run_loop 的 client
};

290
src/tunnel_client.cpp
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@ -1,14 +1,36 @@
#include "tunnel_client.hpp"
#include <atomic>
#include <chrono>
#include <cstdio>
#include <mutex>
#include <nlohmann/json.hpp>
#include <string>
#include <thread>
#include <vector>
#include <websocketpp/client.hpp>
#include <websocketpp/config/asio_no_tls_client.hpp>
#include "httplib.h"
using json = nlohmann::json;
using json = nlohmann::json;
using ws_client = websocketpp::client<websocketpp::config::asio_client>;
namespace
{
constexpr size_t kChunkSize = 64 * 1024; // 64KB
constexpr int kHttpTimeoutSec = 30;
static bool looks_binary_content_type(const std::string& ct)
{
// 你可以按需扩展
if (ct.find("video/") == 0) return true;
if (ct.find("application/octet-stream") != std::string::npos) return true;
if (ct.find("image/") == 0) return true;
return false;
}
} // namespace
TunnelClient::TunnelClient(const std::string& vid, const std::string& server_ws_url, int local_http_port)
: vid_(vid), ws_url_(server_ws_url + "?vid=" + vid), local_port_(local_http_port)
{
@ -16,108 +38,278 @@ TunnelClient::TunnelClient(const std::string& vid, const std::string& server_ws_
void TunnelClient::start()
{
running_ = true;
running_.store(true);
th_ = std::thread(&TunnelClient::run_loop, this);
}
void TunnelClient::stop()
{
running_ = false;
running_.store(false);
if (client_)
{
client_->get_io_service().post(
[this]()
{
try
{
websocketpp::lib::error_code ec;
client_->close(hdl_, websocketpp::close::status::going_away, "stop", ec);
}
catch (...)
{
}
});
}
if (th_.joinable()) th_.join();
}
std::string TunnelClient::handle_local_http(const std::string& method, const std::string& path, const std::string& body)
// =========================== 发送工具（线程安全） ===========================
void TunnelClient::send_text_safe(const std::string& s)
{
if (!client_) return;
client_->get_io_service().post(
[this, s]()
{
websocketpp::lib::error_code ec;
client_->send(hdl_, s, websocketpp::frame::opcode::text, ec);
if (ec)
{
std::printf("[Tunnel] send_text failed: %s\n", ec.message().c_str());
}
});
}
void TunnelClient::send_binary_safe(const void* data, size_t len)
{
if (!client_) return;
std::string payload(reinterpret_cast<const char*>(data), len); // 拷贝一份，避免原buffer生命周期问题
client_->get_io_service().post(
[this, payload]()
{
websocketpp::lib::error_code ec;
client_->send(hdl_, payload, websocketpp::frame::opcode::binary, ec);
if (ec)
{
std::printf("[Tunnel] send_binary failed: %s\n", ec.message().c_str());
}
});
}
// =========================== 核心：处理本地 HTTP 并回传 ===========================
void TunnelClient::handle_request_and_reply(const json& req)
{
const std::string req_id = req.value("req_id", "");
const std::string method = req.value("method", "GET");
const std::string path = req.value("path", "/");
const std::string body = req.value("body", "");
std::printf("[Tunnel] req_id=%s %s %s\n", req_id.c_str(), method.c_str(), path.c_str());
httplib::Client cli("127.0.0.1", local_port_);
cli.set_read_timeout(10, 0);
httplib::Result res;
cli.set_connection_timeout(kHttpTimeoutSec, 0);
cli.set_read_timeout(kHttpTimeoutSec, 0);
cli.set_write_timeout(kHttpTimeoutSec, 0);
cli.set_keep_alive(true);
// 这里只实现 GET / POST；你可以补 PUT/DELETE
if (method == "GET")
{
res = cli.Get(path.c_str());
}
else if (method == "POST")
{
res = cli.Post(path.c_str(), body, "application/json");
}
else
{
return json({{"status", 405}, {"body", "unsupported method"}}).dump();
// 关键：用流式接收响应体，避免 res->body 把大文件吃进内存
bool started_header = false;
int status_code = 0;
std::string content_type = "application/octet-stream";
auto ok = cli.Get(
path.c_str(),
// on_response: 拿到 header 时回一个 header frame
[&](const httplib::Response& res)
{
status_code = res.status;
auto it = res.headers.find("Content-Type");
if (it != res.headers.end()) content_type = it->second;
json hdr = {
{"type", "header"},
{"req_id", req_id},
{"status", status_code},
{"content_type", content_type},
};
send_text_safe(hdr.dump());
started_header = true;
std::printf("[Tunnel] local status=%d ct=%s\n", status_code, content_type.c_str());
return true; // continue
},
// on_data: 每块数据都用 binary frame 发给服务器
[&](const char* data, size_t data_length)
{
if (!started_header)
{
// 极少情况：没走到 on_response（按 httplib 实现一般不会发生）
json hdr = {
{"type", "header"}, {"req_id", req_id}, {"status", 200}, {"content_type", content_type}};
send_text_safe(hdr.dump());
started_header = true;
}
send_binary_safe(data, data_length);
return true; // continue
});
if (!ok)
{
json err = {{"type", "json"}, {"req_id", req_id}, {"status", 500}, {"body", "local http error"}};
send_text_safe(err.dump());
std::printf("[Tunnel] local http error (GET)\n");
return;
}
// 结束帧
json end = {{"type", "end"}, {"req_id", req_id}};
send_text_safe(end.dump());
std::printf("[Tunnel] done req_id=%s\n", req_id.c_str());
return;
}
if (!res)
if (method == "POST")
{
return json({{"status", 500}, {"body", "local http error"}}).dump();
// POST 多数是小 JSON，先简单按文本处理
auto res = cli.Post(path.c_str(), body, "application/json");
if (!res)
{
json err = {{"type", "json"}, {"req_id", req_id}, {"status", 500}, {"body", "local http error"}};
send_text_safe(err.dump());
std::printf("[Tunnel] local http error (POST)\n");
return;
}
std::string ct = "application/json";
auto it = res->headers.find("Content-Type");
if (it != res->headers.end()) ct = it->second;
json out = {
{"type", "json"}, {"req_id", req_id}, {"status", res->status}, {"content_type", ct}, {"body", res->body},
};
send_text_safe(out.dump());
std::printf("[Tunnel] POST done req_id=%s status=%d\n", req_id.c_str(), res->status);
return;
}
return json({{"status", res->status}, {"body", res->body}}).dump();
json out = {{"type", "json"}, {"req_id", req_id}, {"status", 405}, {"body", "unsupported method"}};
send_text_safe(out.dump());
}
// =========================== run loop ===========================
void TunnelClient::run_loop()
{
ws_client c;
c.clear_access_channels(websocketpp::log::alevel::all);
c.init_asio();
websocketpp::connection_hdl hdl;
client_ = &c;
// ----------------------- WebSocket 回调 -----------------------
c.set_open_handler(
[&](websocketpp::connection_hdl h)
[this](websocketpp::connection_hdl h)
{
hdl = h;
printf("[Tunnel] Connected to server\n");
hdl_ = h;
std::printf("[Tunnel] Connected to server\n");
});
c.set_close_handler([&](websocketpp::connection_hdl) { printf("[Tunnel] Disconnected from server\n"); });
c.set_close_handler([this](websocketpp::connection_hdl) { std::printf("[Tunnel] Disconnected from server\n"); });
c.set_fail_handler([this](websocketpp::connection_hdl) { std::printf("[Tunnel] Connect failed\n"); });
c.set_message_handler(
[&](websocketpp::connection_hdl, ws_client::message_ptr msg)
[this](websocketpp::connection_hdl, ws_client::message_ptr msg)
{
try
{
std::string payload = msg->get_payload();
if (msg->get_opcode() != websocketpp::frame::opcode::text)
{
std::printf("[Tunnel] ignore non-text msg from server\n");
return;
}
auto payload = msg->get_payload();
json req = json::parse(payload);
std::string req_id = req["req_id"];
std::string method = req["method"];
std::string path = req["path"];
std::string body = req.value("body", "");
std::string local_result = handle_local_http(method, path, body);
json resp;
resp["req_id"] = req_id;
resp["resp"] = json::parse(local_result);
c.send(hdl, resp.dump(), websocketpp::frame::opcode::text);
// 同步处理会阻塞 websocket 线程：这里开线程处理，避免卡住心跳/读写
std::thread(
[this, req]()
{
try
{
handle_request_and_reply(req);
}
catch (const std::exception& e)
{
std::printf("[Tunnel] handler exception: %s\n", e.what());
}
catch (...)
{
std::printf("[Tunnel] handler unknown exception\n");
}
})
.detach();
}
catch (const std::exception& e)
{
std::printf("[Tunnel] JSON parse error: %s\n", e.what());
}
catch (...)
{
printf("[Tunnel] JSON or HTTP error\n");
std::printf("[Tunnel] JSON parse unknown error\n");
}
});
// ----------------------- 建立连接 -----------------------
websocketpp::lib::error_code ec;
auto conn = c.get_connection(ws_url_, ec);
if (ec)
{
printf("[Tunnel] Connection init failed: %s\n", ec.message().c_str());
std::printf("[Tunnel] Connection init failed: %s\n", ec.message().c_str());
client_ = nullptr;
return;
}
c.connect(conn);
// ----------------------- 主循环 -----------------------
while (running_)
// 用 run()：稳定事件循环
while (running_.load())
{
// 处理一次事件
c.run_one();
try
{
c.run();
// run() 返回说明 stopped 了，稍等再重连
}
catch (const std::exception& e)
{
std::printf("[Tunnel] run exception: %s\n", e.what());
}
catch (...)
{
std::printf("[Tunnel] run unknown exception\n");
}
// 如果连接停止（断线、错误等）——退出 loop
if (c.stopped()) break;
if (!running_.load()) break;
std::printf("[Tunnel] reconnecting in 2s...\n");
std::this_thread::sleep_for(std::chrono::seconds(2));
// 重建连接
c.reset();
c.init_asio();
websocketpp::lib::error_code ec2;
auto conn2 = c.get_connection(ws_url_, ec2);
if (ec2)
{
std::printf("[Tunnel] reconnect init failed: %s\n", ec2.message().c_str());
continue;
}
c.connect(conn2);
}
printf("[Tunnel] Loop exit\n");
std::printf("[Tunnel] Loop exit\n");
client_ = nullptr;
}