C++ 手撸简易服务器（完善版本）

本文没有带反射部分内容，可以看我之前发的

Server.h

#pragma once

#include <string>
#include <iostream>
#include <thread>
#include <unordered_map>
using namespace std;
#ifndef _SERVER_
#define _SERVER_

#include <winsock.h>
#include "Net.h"
#include "Util.h"
#pragma comment(lib,"ws2_32.lib")

NAME_SPACE_START(myUtil)

#define SERVER_ADDR "127.0.0.1"
#define SERVER_PORT 8080

class Server {
public:
    Server();
    Server(const std::string& addr = SERVER_ADDR, const int& port = SERVER_PORT);
    ~Server() {}
public:
    bool listen(const int& maxConnect = 1);
    void setRoute(const string& url, const string& className, const string& classFunName);
    void runRoute(const Request& req, Response* resp);
    void setInterceptor(const string& url, const string& InterceptorName);
    void close();
protected:
    bool Init();
    void threadFunc(SOCKET m_server);
    int sendTelegram(const SOCKET& accept, const string& info, int flags);
private:
    SOCKET m_server;
    SOCKADDR_IN m_add_in;
    //thread listenThread;
    int connectCount{ 0 };
    unordered_map<string, pair<string, string>> routeMap;
    unordered_map<string, string> interceptorMap;
    IniHelper iniHelper;
};

NAME_SPACE_END()
#endif //!_SERVER_

Server.cpp

#include "Server.h"
#include <minwindef.h>
#include <string>
#include <winsock.h>
#include <iostream>
#include <thread>
#include <fstream>
#include "Net.h"
#include "Util.h"
#include "Reflex.h"
#include "CController.h"
#include "Interceptor.h"
using namespace std;

NAME_SPACE_START(myUtil)

Server::Server()
{
    m_add_in.sin_family = AF_INET;
    m_add_in.sin_addr.S_un.S_addr = htonl(INADDR_ANY);
    m_add_in.sin_port = htons(SERVER_PORT);
}

Server::Server(const std::string& addr, const int& port)
{
    m_add_in.sin_family = AF_INET;
    m_add_in.sin_addr.S_un.S_addr = inet_addr(addr.c_str());
    m_add_in.sin_port = htons(port);
}

bool Server::listen(const int& maxConnect)
{
    if (!Init()) {
        return false;
    }
    m_server = socket(AF_INET, SOCK_STREAM, 0);
    if (::bind(m_server, (sockaddr*)&m_add_in, sizeof(SOCKADDR)) == SOCKET_ERROR) {
        WSACleanup();
        return false;
    }
    if (::listen(m_server, maxConnect) < 0) {
        WSACleanup();
        return false;
    }
    thread listenThread(&Server::threadFunc, this, m_server);
    listenThread.join();
    return true;
}

void Server::setRoute(const string& url, const string& className, const string& classFunName)
{
    routeMap.insert(pair<string, pair<string, string>>(url, pair<string, string>(className, classFunName)));
}

void Server::runRoute(const Request& req, Response* resp)
{
    string url = req.getRequestStatus().Url;
    Reflex* factory = myUtil::Singleton<Reflex>::Instance();
    string interceptorName = "";
    string res = "";
    string content = "";
    //拦截器
    //先去拦截器映射表中寻找类名，没有的话默认使用基类
    auto interceptorIt = interceptorMap.find(url);
    if (interceptorIt != interceptorMap.end()) interceptorName = interceptorIt->second;
    Interceptor* inter = (Interceptor*)factory->createClass(interceptorName);
    if (inter == nullptr) inter = new Interceptor();
    if (inter->preHandle(req, *resp)) {
        //反射
        auto it = routeMap.find(url);
        if (it != routeMap.end()) {
            CController* cont = (CController*)factory->createClass(it->second.first);
            res = cont->Call<string, Request, Response*>(it->second.second, req, resp);
        }
        //反射结束
    }
    else {
        resp->setResponseStatus("HTTP", 1, 1, 404, "Forbidden");
    }
    if (url.find("favicon.ico") != string::npos) {
        content = getFile(iniHelper.getIniConfig("staticResource", "favicon_path", "./favicon.ico"));
        resp->setResponseHead("content-type", "image/x-icon");
    }
    else if(res != "") {
        try {
            content = getFile(res);
        }
        catch(exception ex){
            content = ex.what();
        }
    }
    resp->setResponseContent(content);
    auto list = resp->getCookie();
    for (auto item : list) {
        resp->setResponseHead("Set-Cookie", item.toString());
    }
    resp->setResponseHead("content-length", to_string(content.size()));
    resp->setResponseHead("Server", "C++MVC");
    inter->postHandle(req, *resp);
}

void Server::setInterceptor(const string& url, const string& InterceptorName)
{
    interceptorMap.insert(pair<string, string>(url, InterceptorName));
}

void Server::close()
{
    closesocket(m_server);
    WSACleanup();
}

bool Server::Init()
{
    WORD ver = MAKEWORD(2, 2);
    WSADATA wsadata;
    int errFlag = -1;
    errFlag = WSAStartup(ver, &wsadata);
    if (errFlag != 0) return false;
    //检测版本号
    if (LOBYTE(wsadata.wVersion) != 2 || HIBYTE(wsadata.wHighVersion) != 2) {
        WSACleanup();
        return false;
    }
    return true;

}
void Server::threadFunc(SOCKET m_server)
{
    while (1) {
        SOCKADDR_IN m_acc_in;
        int len = sizeof(SOCKADDR);
        SOCKET m_accept = accept(m_server, (sockaddr*)&m_acc_in, &len);
        if (m_accept == SOCKET_ERROR) {
            continue;
        }
        int recv_len = 0;
        char recv_buf[10000];
        recv_len = recv(m_accept, recv_buf, 10000, 0);
        
        //char 转 wchar
        int  unicodeLen = ::MultiByteToWideChar(CP_UTF8, 0, recv_buf, -1, NULL, 0);
        wchar_t* pUnicode = new  wchar_t[unicodeLen];
        memset(pUnicode, 0, unicodeLen * sizeof(wchar_t));
        ::MultiByteToWideChar(CP_UTF8, 0, recv_buf, -1, (LPWSTR)pUnicode, unicodeLen);
        wstring  rt = pUnicode;
        //重设大小
        char* pAscii = new char[recv_len];
        memset(pAscii, 0, sizeof(char) * recv_len);
        strncpy(pAscii, recv_buf, recv_len);
        string lrt(pAscii);
        //解析请求
        Request req(lrt);
        Response resp;
        runRoute(req, &resp);
        cout << "请求地址：" << req.getRequestStatus().Url << endl;
        sendTelegram(m_accept, resp.toString(), 0);
        closesocket(m_accept);
    }
}

int Server::sendTelegram(const SOCKET& accept, const string& info, int flags)
{
    int res = send(accept, info.c_str(), info.size(), flags);
    return res;
}

NAME_SPACE_END()

Interceptor.h

#pragma once
#include "Net.h"
#include "Reflex.h"
using namespace myUtil;
#ifndef _INTERCEPTOR_
#define _INTERCEPTOR_

class Interceptor : public RObject {
public:
    virtual bool preHandle(const Request& request, const Response& response) { return true; }

    virtual void postHandle(const Request& request, const Response& response) {}

    virtual void afterCompletion(const Request& request, const Response& response) {}
};

#endif //!_INTERCEPTOR_

indexInterceptor.h

#pragma once
#include "Interceptor.h"
class IndexInterceptor : public Interceptor {
public:
    bool preHandle(const Request& request, const Response& response) override {
        return false;
    }

    void postHandle(const Request& request, const Response& response) override {}

    void afterCompletion(const Request& request, const Response& response) override {}
};

InterceptorMacro.h

#pragma once
#include "Reflex.h"
#include "indexInterceptor.h"
#define REFLEX_INPERCEPTOR_DECLARE \
REGISTER_REFLEX(IndexInterceptor)

Cookie.h

#pragma once
#ifndef _COOKIE_
#define _COOKIE_
#include <string>
using namespace std;
class Cookie
{
public:
	Cookie() {}
	Cookie(const string& name, const string& value) :
		_name(name), _value(value) {
		_comment = "";
		_path = "";
		_domain = "";
		_version = "";
		_maxAge = 0;
	}
	string getNameValue() const;
	void setNameValue(const string& name, const string& value);
	void setComment(const string& comment);
	void setPath(const string& path);
	void setDomain(const string& domain);
	void setVersion(const string& version);
	void setMaxAge(const int& maxAge);
	string getComment() const;
	string getPath() const;
	string getDomain() const;
	string getVersion() const;
	int getMaxAge() const;
	string toString() const;
private:
	string _name;
	string _value;
	//注释
	string _comment;
	//路径，若要访问的url startwith（path）此cookie携带
	string _path;
	//网站域名
	string _domain;
	string _version;
	//生存时间
	int _maxAge{ 0 };
};

#endif //!_COOKIE_

Cookie.cpp

#include "Cookie.h"

string Cookie::getNameValue() const
{
	return _name + "=" + _value;
}

void Cookie::setNameValue(const string& name, const string& value)
{
	_name = name;
	_value = value;
}

void Cookie::setComment(const string& comment)
{
	_comment = comment;
}

void Cookie::setPath(const string& path)
{
	_path = path;
}

void Cookie::setDomain(const string& domain)
{
	_domain = domain;
}

void Cookie::setVersion(const string& version)
{
	_version = version;
}

void Cookie::setMaxAge(const int& maxAge)
{
	_maxAge = maxAge;
}

string Cookie::getComment() const
{
	return _comment;
}

string Cookie::getPath() const
{
	return _path;
}

string Cookie::getDomain() const
{
	return _domain;
}

string Cookie::getVersion() const
{
	return _version;
}

int Cookie::getMaxAge() const
{
	return _maxAge;
}

string Cookie::toString() const
{
	string res = getNameValue();
	if (_comment != "") res += ";comment=" + _comment;
	if (_path != "") res += ";Path=" + _path;
	if (_domain != "") res += ";Domain=" + _domain;
	if (_version != "") res += ";Version=" + _version;
	res += ";Max-Age=" + _maxAge;
	return res;
}

CController.h

#pragma once
#ifndef _CCONTROLLER_
#define _CCONTROLLER_
#include "Reflex.h"
using namespace myUtil;
class CController : public RObject
{
};
#endif //!_CCONTROLLER_

indexController.h

#pragma once
#include "CController.h"
#include "Net.h"
#include "Reflex.h"
using namespace myUtil;
class indexController : public CController
{
public:
	indexController() {}
	~indexController() {}
	string index(const Request& req, Response* resp);
	string test(const Request& req, Response* resp);
};

indexController.cpp

#include "indexController.h"
#include <fstream>
using namespace std;

string indexController::index(const Request& req, Response* resp)
{
    resp->setResponseStatus("HTTP", 1, 1, 200, "OK");
    resp->setResponseHead("Content-Type", "text/html,charset=UTF-8");
    return "index.html";
}

string indexController::test(const Request& req, Response* resp)
{
    resp->setResponseStatus("HTTP", 1, 1, 200, "OK");
    resp->setResponseHead("Content-Type", "text/html,charset=UTF-8");
    Cookie cookie("test", "test");
    cookie.setDomain("localhost");
    cookie.setMaxAge(10);
    cookie.setPath("/test");
    resp->setCookie(cookie);
    return "test.html";
}

ControllerMacro.h

#pragma once
#include "indexController.h"
#define REFLEX_DECLARE \
REGISTER_REFLEX(indexController)\
REGISTER_REFLEX_METHOD_ARGS(indexController, index, string, Request&, Response*)\
REGISTER_REFLEX_METHOD_ARGS(indexController, test, string, Request&, Response*)

Net.h

#pragma once
#ifndef _NET_
#define _NET_

#include <string>
#include <wtypes.h>
#include <unordered_map>
#include "Util.h"
#include "Cookie.h"
using namespace std;

NAME_SPACE_START(myUtil)

#define BLACK "\r\n"
#define SPACE " "

class Net {
public:
	virtual string toString() = 0;
	virtual vector<Cookie> getCookie() const = 0;
	virtual void setCookie(const Cookie& cookie) = 0;
	Net() {}
protected:
	vector<Cookie> _cookie;
};

struct RequestStatus
{
	string RMethod;
	string Url;
	string ProName;
	short verHigh;
	short verLow;
};

struct ResponseStatus
{
	string ProName;
	short verHigh;
	short verLow;
	short status;
	string statusWord;
};

//请求
class Request : public Net {
public:
	Request();
	Request(const string& sourceStr);
	void setRequestStatus(const string& method = "GET", const string& url = "/", const string& _proName = "HTTP", const short& _verHigh = 1, const short& _verLow = 1);
	void setRequestHead(const string& headKey, const string& headValue);
	void setRequestContent(const string& content);

	RequestStatus getRequestStatus() const;
	string getRequestContent(const string& headKey) const;

	vector<Cookie> getCookie() const override;
	void setCookie(const Cookie& cookie) override;

	string toString() override;
	~Request() {}
private:
	RequestStatus _status;
	unordered_map<string, string> _RequestHead;
	string _RequestContent{ "" };
};

//响应
//结构 状态行, 响应头部, 空行, 响应正文
class Response : public Net {
public:
	Response();
	void setResponseStatus(const string& _proName = "HTTP", const short& _verHigh = 1, const short& _verLow = 1, const short& status = 200, const string& word = "");
	void setResponseHead(const string& headKey, const string& headValue);
	void setResponseContent(const string& content);

	ResponseStatus getResponseStatus() const;
	string getResponseHeadByKey(const string& headKey) const;

	vector<Cookie> getCookie() const override;
	void setCookie(const Cookie& cookie) override;

	string toString() override;
	~Response();
private:
	ResponseStatus _status;
	unordered_map<string, string> _ResponseHead;
	string _ResponseContent{ "" };
};

class Analyse {
public:
	static vector<string> getVectorBySplit(const string& source, const char& ch);
	static unordered_map<string, string> getMapBySplit(const string& source, const char& ch1,const char& ch2);
	static string makeVectorByChar(const vector<string>& v, const char& ch);
	static string makeMapByChars(const unordered_map<string, string>& m, const char& ch1, const char& ch2);
};


NAME_SPACE_END()
#endif //!_NET_

Net.cpp

#include "Net.h"
NAME_SPACE_START(myUtil)

Response::Response()
{
	_status.ProName = "HTTP";
	_status.verHigh = 1;
	_status.verLow = 1;
	_status.status = 200;
	_status.statusWord = "OK";
}

void Response::setResponseStatus(const string& _proName, const short& _verHigh, const short& _verLow, const short& status, const string& word)
{
	_status.ProName = _proName;
	_status.verHigh = _verHigh;
	_status.verLow = _verLow;
	_status.status = status;
	_status.statusWord = word;
}

void Response::setResponseHead(const string& headKey, const string& headValue)
{
	_ResponseHead.insert(pair<string, string>(headKey, headValue));
}

void Response::setResponseContent(const string& content)
{
	_ResponseContent = content;
}

ResponseStatus Response::getResponseStatus() const
{
	return _status;
}

string Response::getResponseHeadByKey(const string& headKey) const
{
	auto it = _ResponseHead.find(headKey);
	if (it == _ResponseHead.end()) return "";
	return (*it).second;
}

vector<Cookie> Response::getCookie() const
{
	return _cookie;
}

void Response::setCookie(const Cookie& cookie)
{
	_cookie.push_back(cookie);
}

string Response::toString()
{
	string res = "";
	res += _status.ProName + "/" + to_string(_status.verHigh) + "." + to_string(_status.verLow)
		+ SPACE + to_string(_status.status) + SPACE + _status.statusWord + BLACK;
	for (auto it = _ResponseHead.begin(); it != _ResponseHead.end(); it++) {
		res += (*it).first + ":" + SPACE + (*it).second + BLACK;
	}
	res += BLACK;
	res += _ResponseContent;
	return res;
}

Response::~Response()
{
}

Request::Request(const string& sourceStr)
{
	int i = 0;
	vector<string> reqGroup = Analyse::getVectorBySplit(sourceStr, '\n');
	//解析状态行
	vector<string> statuses = Analyse::getVectorBySplit(reqGroup[0], ' ');
	_status.RMethod = statuses.at(0);
	_status.Url = statuses.at(1);
	statuses.at(2).pop_back();
	vector<string> verInfo = Analyse::getVectorBySplit(statuses.at(2), '/');
	_status.ProName = verInfo.at(0);
	_status.verHigh = Analyse::getVectorBySplit(verInfo.at(1), '.').at(0).at(0) - '0';
	_status.verLow = Analyse::getVectorBySplit(verInfo.at(1), '.').at(1).at(0) - '0';
	//解析请求头
	for (i = 1; i < reqGroup.size(); i++) {
		if (reqGroup[i] == "\r")break;
		reqGroup[i].pop_back();
		vector<string> temp = Analyse::getVectorBySplit(reqGroup[i], ':');
		_RequestHead.insert(pair<string, string>(temp.at(0), temp.at(1)));
	}
	i++;
	for (i; i < reqGroup.size(); i++) {
		_RequestContent += reqGroup.at(i) + "\n";
	}
}

void Request::setRequestStatus(const string& method, const string& url, const string& _proName, const short& _verHigh, const short& _verLow)
{
	_status.RMethod = method;
	_status.Url = url;
	_status.ProName = _proName;
	_status.verHigh = _verHigh;
	_status.verLow = _verLow;
}

void Request::setRequestHead(const string& headKey, const string& headValue)
{
	_RequestHead.insert(pair<string, string>(headKey, headValue));
}

void Request::setRequestContent(const string& content)
{
	_RequestContent = content;
}

RequestStatus Request::getRequestStatus() const
{
	return _status;
}

string Request::getRequestContent(const string& headKey) const
{
	return _RequestContent;
}

string Request::toString()
{
	string res = "";
	res += _status.RMethod + SPACE + _status.Url + SPACE + _status.ProName + "/"
		+ to_string(_status.verHigh) + "." + to_string(_status.verLow) + BLACK;
	for (auto it = _RequestHead.begin(); it != _RequestHead.end(); it++) {
		res += (*it).first + ":" + SPACE + (*it).second + BLACK;
	}
	res += BLACK;
	res += _RequestContent;
	return res;
}

vector<Cookie> Request::getCookie() const
{
	return _cookie;
}

void Request::setCookie(const Cookie& cookie)
{
	_cookie.push_back(cookie);
}

vector<string> Analyse::getVectorBySplit(const string& source, const char& ch)
{
	vector<string> res;
	string temp = "";
	for (int i = 0; i < source.size(); i++) {
		if (source[i] == ch) {
			res.push_back(temp);
			temp = "";
		}
		else {
			char ch = source[i];
			temp.push_back(ch);
		}
	}
	if (temp != "") res.push_back(temp);
	return res;
}

unordered_map<string, string> Analyse::getMapBySplit(const string& source, const char& ch1, const char& ch2)
{
	unordered_map<string, string> res;
	vector<string> temp = getVectorBySplit(source, ch1);
	for (string str : temp) {
		vector<string> t = getVectorBySplit(str, ch2);
		if (t.size() != 2) continue;
		res.insert(pair<string, string>(t.at(0), t.at(1)));
	}
	return res;
}

string Analyse::makeVectorByChar(const vector<string>& v, const char& ch)
{
	string res = "";
	for (auto str : v) {
		res += str + ch;
	}
	res.pop_back();
	return res;
}

string Analyse::makeMapByChars(const unordered_map<string, string>& m, const char& ch1, const char& ch2)
{
	string res = "";
	for (auto it = m.begin(); it != m.end(); it++) {
		res += it->first + ch2 + it->second + ch1;
	}
	res.pop_back();
	return res;
}
NAME_SPACE_END()

config.ini

[staticResource]
favicon_path=./ico/favicon.ico

使用方式如下

通过setRoute设置路由规则，类似于springboot中的注释部分
通过setInterceptor设置拦截器规则，如果没有设置的话，会默认找基类
以上两个设置之后还要再两个macro文件中设置宏展开，否则反射找不到对应的类，关于反射如何使用请看这个
https://blog.csdn.net/weixin_43891802/article/details/129411364

#include <iostream>
#include <string>
#include "ControllerMacro.h"
#include "InterceptorMacro.h"
#include "Server.h"
using namespace std;
using namespace myUtil;

REFLEX_DECLARE
REFLEX_INPERCEPTOR_DECLARE

int main() {
    Server server("127.0.0.1", 8080);
    server.setRoute("/", "indexController", "index");
    server.setRoute("/test", "indexController", "test");
    //server.setInterceptor("/test", "IndexInterceptor");
    server.listen(2);
    return 0;
}