http网络服务器

wwwroot(目录)/index.html

cpp 复制代码

<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>比特就业课</title>
</head>

<body>
    <h3>这是一个Linux课程</h3>
    <p>我是一个Linux的学习者,我正在进行http的测试工作!!!</p>
</body>

</html>

Makefile

cpp 复制代码

HttpServer:HttpServer.cc
	g++ -o HttpServer HttpServer.cc -std=c++11

.PHONY:clean
clean:
	rm -f HttpServer

Log.hpp

cpp 复制代码

#pragma once
#include <iostream>
#include <string>
#include <cstdarg>
#include <cstdio>
#include <ctime>
 
#define DEBUG 0
#define NORMAL 1
#define WARNING 2
#define ERROR 3
#define FATAL 4
 
const char *gLevelMap[5] = {"DEBUG", "NORMAL", "WARNING", "ERROR", "FATAL"};
 
#define LOGFILE "./threadpool.log"
 
void logMessage(int level, const char *format, ...)
{
    char stdBuffer[1024]; // 标准部分
    time_t timestamp = time(nullptr);
    struct tm *time = localtime(&timestamp);
    snprintf(stdBuffer, sizeof stdBuffer, "[%s][%ld]", gLevelMap[level], timestamp);
 
    char logBuffer[1024]; // 自定义部分
    va_list args;
    va_start(args, format);
    vsnprintf(logBuffer, sizeof(logBuffer), format, args); // 使用 vsnprintf 而不是 vsprintf
    va_end(args);
 
    //FILE* fp=fopen(LOGFILE,"a");
 
    //打印到显示器
    printf("%s %s\n", stdBuffer, logBuffer);
 
    // 打印到指定文件
    //fprintf(fp,"%s%s\n",stdBuffer,logBuffer);
 
    //fclose(fp);
}

Sock.hpp

cpp 复制代码

#pragma once
 
#include <iostream>
#include <sys/types.h>
#include <sys/socket.h>
#include <string.h>
#include <arpa/inet.h>
#include <netinet/in.h>
#include <string>
#include <sys/wait.h>
 
#include "Log.hpp"
#include <memory>
 
class Sock
{
private:
    const static int gbacklog = 20;
 
public:
    Sock() {}
    int Socket()
    {
        int listensock = socket(AF_INET, SOCK_STREAM, 0);
        if (listensock < 0)
        {
            logMessage(FATAL, "create socket error,%d:%s", errno, strerror(errno));
            exit(2);
        }
        logMessage(NORMAL, "create socket success, listensock: %d", listensock);
 
        return listensock;
    }
 
    void Bind(int sock, uint16_t port, std::string ip = "0.0.0.0")
    {
        struct sockaddr_in local;
        memset(&local, 0, sizeof(local));
        local.sin_family = AF_INET;
        local.sin_port = htons(port);
        inet_pton(AF_INET, ip.c_str(), &local.sin_addr);
        // local.sin_addr.s_addr = _ip.empty() ? INADDR_ANY : inet_addr(_ip.c_str());
        if (bind(sock, (const sockaddr *)&local, sizeof(local)) < 0)
        {
            logMessage(FATAL, "bind error, %d:%s", errno, strerror(errno));
            exit(3);
        }
    }
 
    void Listen(int sock)
    {
 
        if (listen(sock, gbacklog) < 0)
        {
            logMessage(FATAL, "listen error, %d:%s", errno, strerror(errno));
            exit(4);
        }
        logMessage(NORMAL, "listen server success");
    }
 
    int Accept(int listensock, std::string *ip, uint16_t *port)
    {
        struct sockaddr_in src;
        memset(&src, 0, sizeof(src));
        socklen_t len = sizeof(src);
        int servicesock = accept(listensock, (struct sockaddr *)&src, &len);
        if (servicesock < 0)
        {
            logMessage(ERROR, "accept error,%d:%s", errno, strerror(errno));
            return -1;
        }
        if (port)
            *port = ntohs(src.sin_port);
        if (ip)
            *ip = inet_ntoa(src.sin_addr);
        return servicesock;
    }
 
    bool Connect(int sock, const std::string &server_ip, const uint16_t &server_port)
    {
        struct sockaddr_in server;
        memset(&server, 0, sizeof(server));
        server.sin_family = AF_INET;
        server.sin_port = htons(server_port);
        server.sin_addr.s_addr = inet_addr(server_ip.c_str());
 
        if (connect(sock, (struct sockaddr *)&server, sizeof(server)) == 0)
            return true;
        else
            return false;
    }
 
    ~Sock()
    {
    }
};

Usage.hpp

cpp 复制代码

#pragma once
#include <iostream>

void Usage(const char *args)
{
    std::cout << "\nUsage: " << args << " port" << std::endl;
}

Util.hpp

cpp 复制代码

#pragma once

#include <iostream>
#include <vector>

class Util
{
public:
    static void cutString(const std::string &s, const std::string &sep, std::vector<std::string> *out)
    {
        std::size_t start = 0;
        while (start < s.size())
        {
            auto pos = s.find(sep, start);
            if (pos == std::string::npos)
            {
                break;
            }
            std::string sub = s.substr(start, pos - start);
            out->push_back(sub);
            start += sub.size();
            start += sep.size();
        }
        if (start < s.size())
            out->push_back(s.substr(start));
    }
};

HttpServer.hpp

cpp 复制代码

#pragma once

#include <iostream>
#include "Sock.hpp"
#include <functional>
#include <unistd.h>

class HttpServer
{
public:
    using func_t = std::function<void(int)>;

public:
    HttpServer(uint16_t port, func_t func)
        : _port(port), _func(func)
    {
        _listensock = sock.Socket();
        sock.Bind(_listensock, _port);
        sock.Listen(_listensock);
    }

    void Start()
    {
        signal(SIGCHLD, SIG_IGN);
        while (true)
        {
            std::string clientIp;
            uint16_t clientPort;
            int sockfd = sock.Accept(_listensock, &clientIp, &clientPort);
            if (sockfd == -1)
            {
                continue;
            }
            if (fork() == 0)
            {
                close(_listensock);
                _func(sockfd);
                close(sockfd);
                exit(0);
            }
            close(sockfd);
        }
    }

    ~HttpServer()
    {
        if (_listensock >= 0)
        {
            close(_listensock);
        }
    }

private:
    int _listensock;
    uint16_t _port;
    Sock sock;
    func_t _func;
};

HttpServer.cc

cpp 复制代码

#include <iostream>
#include "HttpServer.hpp"
#include <memory>
#include "Usage.hpp"
#include <unistd.h>
#include "Util.hpp"
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <fstream>

#define ROOT "./wwwroot"
#define HOMEPAGE "index.html"

void HandlerHttpRequest(int sockfd)
{
    // 1.读取请求
    char buffer[1024];
    int s = read(sockfd, buffer, sizeof buffer);
    if (s > 0)
    {
        buffer[s] = 0;
        // std::cout << buffer << "--------------------" << std::endl;
    }

    std::vector<std::string> vline;
    Util::cutString(buffer, "\n", &vline);

    std::vector<std::string> vblock;
    Util::cutString(vline[0], " ", &vblock);

    std::string file = vblock[1];
    std::string target = ROOT;
    
    //默认首页
    if (file == "/")
        file = "/index.html";
    target += file;
    std::cout << target << std::endl;

    std::string content;
    std::ifstream in(target);
    if (in.is_open())
    {
        std::string line;
        while (std::getline(in, line))
        {
            content += line;
        }
        in.close();
    }

    // for (auto &iter : vblock)
    // {
    //     std::cout << iter << "\n"
    //               << std::endl;
    // }

    // 2.试着构建一个http的响应
    std::string HttpResponse;
    if (content.empty())
    {
        HttpResponse = "HTTP/1.1 404 NotFound\r\n";
    }
    else
        HttpResponse = "HTTP/1.1 200 OK\r\n";
    HttpResponse += "\r\n";
    HttpResponse += content;
    send(sockfd, HttpResponse.c_str(), HttpResponse.size(), 0);
}

int main(int argc, char *argv[])
{
    if (argc != 2)
    {
        Usage(argv[0]);
        exit(0);
    }

    std::unique_ptr<HttpServer> httpserver(new HttpServer(atoi(argv[1]), HandlerHttpRequest));
    httpserver->Start();
    return 0;
}