在现代 C++ 后端开发中,如果你需要构建一个轻量、高性能、可嵌入式的 HTTP 服务,而不愿引入重量级框架如 Boost.Beast 或 cpp-httplib,那么 Poco C++ Libraries 提供了一个优雅的解决方案。Poco 是一套广泛使用的 C++ 框架,涵盖网络、线程、文件系统、JSON/XML 等模块。
本篇文章将手把手教你如何使用 Poco 构建一个基础的 HTTP Server,并扩展为一个具备实际用途的请求处理器。
✨ 为什么选择 Poco?
- 
易于集成,无外部依赖(仅需 CMake + 编译 Poco) 
- 
支持多线程、高并发 
- 
内置 HTTPServer、WebSocket、REST 支持 
- 
类似 Java Servlet 模型:请求/响应 + 工厂 + Handler my_http_server/ 
 ├── CMakeLists.txt
 ├── MyHttpApp.h
 ├── MyHttpApp.cpp
 ├── RequestHandlerFactory.h
 ├── RequestHandlerFactory.cpp
 └── main.cpp项目结构 // RequestHandlerFactory.h 
 #pragma once
 #include <Poco/Net/HTTPRequestHandlerFactory.h>
 #include <Poco/Net/HTTPRequestHandler.h>
 #include <Poco/Net/HTTPServerRequest.h>
 #include <Poco/Net/HTTPServerResponse.h>class RequestHandler : public Poco::Net::HTTPRequestHandler { 
 public:
 void handleRequest(Poco::Net::HTTPServerRequest& request,
 Poco::Net::HTTPServerResponse& response) override;
 };class RequestHandlerFactory : public Poco::Net::HTTPRequestHandlerFactory { 
 public:
 Poco::Net::HTTPRequestHandler* createRequestHandler(const Poco::Net::HTTPServerRequest&) override;
 };
 // RequestHandlerFactory.cpp
 #include "RequestHandlerFactory.h"
 #include <iostream>void RequestHandler::handleRequest(Poco::Net::HTTPServerRequest& request, 
 Poco::Net::HTTPServerResponse& response) {
 response.setStatus(Poco::Net::HTTPResponse::HTTP_OK);
 response.setContentType("text/plain");std::ostream& ostr = response.send(); 
 ostr << "Hello from Poco ServerApplication HTTP Server!\\n";
 }Poco::Net::HTTPRequestHandler* RequestHandlerFactory::createRequestHandler(const Poco::Net::HTTPServerRequest&) { 
 return new RequestHandler;
 }
 #pragma once
 #include <Poco/Util/ServerApplication.h>
 #include <Poco/Net/HTTPServer.h>
 #include <Poco/Net/HTTPServerParams.h>
 #include <Poco/Net/ServerSocket.h>class MyHttpApp : public Poco::Util::ServerApplication { 
 protected:
 int main(const std::vector<std::string>& args) override;
 };
 #include "MyHttpApp.h"
 #include "RequestHandlerFactory.h"
 #include <iostream>int MyHttpApp::main(const std::vector<std::string>& args) { 
 Poco::UInt16 port = 8080;
 Poco::Net::ServerSocket svs(port);Poco::Net::HTTPServerParams* params = new Poco::Net::HTTPServerParams; 
 params->setMaxQueued(100);
 params->setMaxThreads(8);Poco::Net::HTTPServer server(new RequestHandlerFactory, svs, params); 
 server.start();
 std::cout << "HTTP server started on port " << port << std::endl;waitForTerminationRequest(); // 等待 Ctrl+C 或 kill 信号 
 std::cout << "Shutting down…" << std::endl;
 server.stop();return Application::EXIT_OK; 
 }
 //main.cpp
 #include "MyHttpApp.h"int main(int argc, char** argv) { 
 MyHttpApp app;
 return app.run(argc, argv);
 }
 #CMakeLists.txt
 cmake_minimum_required(VERSION 3.10)
 project(MyPocoHttpServer)find_package(Poco REQUIRED Net Util Foundation) add_executable(server 
 main.cpp
 MyHttpApp.cpp
 RequestHandlerFactory.cpp
 )target_link_libraries(server 
 Poco::Net
 Poco::Util
 Poco::Foundation
 )构建和运行 mkdir build && cd build 
 cmake ..
 make
 ./server
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