Python线程中对join方法的运用的教程

/*!Copyright (c) 2025-2026 TP-LINK Technologies CO.,LTD. *All rights reserved. * *\file single_web.c *\brief 单线程阻塞式 WebServer * *\author Fu Yu <[email protected]> *\version 1.0.0 *\date 2025-08-07 * *\history \arg 1.0.0 2025-08-07, Fu Yu, Create file. */ #ifndef SINGLE_WEB_H_ #define SINGLE_WEB_H_ /**************************************************************************************************/ /* INCLUDE_FILES */ /**************************************************************************************************/ #define _GNU_SOURCE #include <strings.h> #include <stdio.h> #include <stdlib.h> #include <string.h> #include <unistd.h> #include <errno.h> #include <arpa/inet.h> #include <fcntl.h> #include <sys/stat.h> /**************************************************************************************************/ /* DEFINES */ /**************************************************************************************************/ #define PORT 8080 /* 监听端口 */ #define BACKLOG 10 /* 等待连接队列长度 */ #define ROOT "web" /* 前端根目录 */ #define BUF_SIZE 8192 /* 读写缓冲区大小 */ /**************************************************************************************************/ /* TYPES */ /**************************************************************************************************/ /**************************************************************************************************/ /* VARIBLES */ /**************************************************************************************************/ /**************************************************************************************************/ /* PUBLIC_FUNCTIONS */ /**************************************************************************************************/ /**************************************************************************************************/ /* LOCAL_FUNCTIONS */ /**************************************************************************************************/ #endif /* 根据文件扩展名返回 HTTP Content-Type */ static const char *mime(const char *ext) { if (!ext) return "application/octet-stream"; if (!strcasecmp(ext, "html") || !strcasecmp(ext, "htm")) return "text/html"; if (!strcasecmp(ext, "css")) return "text/css"; if (!strcasecmp(ext, "js")) return "application/javascript"; if (!strcasecmp(ext, "png")) return "image/png"; if (!strcasecmp(ext, "jpg") || !strcasecmp(ext, "jpeg")) return "image/jpeg"; return "text/plain"; } int main(int argc, char *argv[]) { int port = argc > 1 ? atoi(argv[1]) : PORT; /* 支持命令行传端口 */ /* 1. 创建 TCP 套接字 */ int listenfd = socket(AF_INET, SOCK_STREAM, 0); /* IPv4 面向字节流的TCP 协议自动选择TCP*/ if (listenfd < 0) { perror("socket"); exit(EXIT_FAILURE); } /* 设置地址重用 */ int opt = 1; setsockopt(listenfd, SOL_SOCKET, SO_REUSEADDR, &opt, sizeof(opt)); /* 2. 绑定本地地址（IP+端口） */ struct sockaddr_in addr = {0}; addr.sin_family = AF_INET; /* IPv4 */ addr.sin_port = htons(port); /* 端口号转网络字节序 */ addr.sin_addr.s_addr = htonl(INADDR_ANY); /* 监听所有网卡 */ /* bind() 把“地址+端口”贴到套接字上 */ if (bind(listenfd, (struct sockaddr *)&addr, sizeof(addr)) == -1) { perror("bind"); exit(EXIT_FAILURE); } /* listen() 把主动套接字变成“被动监听”套接字,允许接受连接 */ if (listen(listenfd, BACKLOG) == -1) { perror("listen"); exit(EXIT_FAILURE); } printf("单线程 WebServer 已启动 http://localhost:%d\n", port); /* 3. 单线程主循环:一次只处理一个连接 */ while (1) { struct sockaddr_in cli; /* 客户端地址 */ socklen_t len = sizeof(cli); int connfd = accept(listenfd, (struct sockaddr *)&cli, &len); /* 阻塞等待 */ if (connfd < 0) /* accept 出错 */ { if (errno == EINTR) { continue; /* 被信号中断 */ } perror("accept"); continue; } /* 4. 读取请求首行 */ char buf[BUF_SIZE] = {0}; ssize_t n = recv(connfd, buf, sizeof(buf) - 1, 0); if (n <= 0) /* 客户端断开 */ { close(connfd); continue; } buf[n] = 0; /* 字符串结束 */ char method[8], path[256], proto[16]; sscanf(buf, "%7s %255s %15s", method, path, proto); /* 解析 GET /xxx HTTP/1.1 */ /* 5. 默认首页 / -> /Index.html */ if (strcmp(path, "/") == 0) { strcpy(path, "/Index.html"); } /* 6. 简单防目录穿越 */ if (strstr(path, "..")) { const char *rsp = "HTTP/1.1 400 Bad Request\r\n\r\n"; send(connfd, rsp, strlen(rsp), 0); close(connfd); continue; } /* 7. 构造磁盘绝对路径并打印 */ char file_path[512]; snprintf(file_path, sizeof(file_path), "%s%s", ROOT, path); fprintf(stderr, "[DEBUG] path=%s file_path=%s\n", path, file_path); /* 8. 打开文件，不存在则 404 */ int fd = open(file_path, O_RDONLY); if (fd < 0) { const char *rsp = "HTTP/1.1 404 Not Found\r\n\r\n<h1>404</h1>"; send(connfd, rsp, strlen(rsp), 0); close(connfd); continue; } /* 9. 获取文件大小与Content-Type */ struct stat st; fstat(fd, &st); const char *ext = strrchr(file_path, '.'); const char *ct = mime(ext ? ext + 1 : NULL); /* 10. 发送 HTTP 响应头 */ char header[512]; int hd_len = snprintf(header, sizeof(header), /* HTTP响应头 */ "HTTP/1.1 200 OK\r\n" /* 状态行 */ "Content-Type: %s\r\n" /* 文件类型 */ "Content-Length: %ld\r\n" /* 正文长度 */ "Connection: close\r\n\r\n", ct, st.st_size); send(connfd, header, hd_len, 0);/* 写入套接字 */ /* 11. 发送文件内容 */ char file_buf[BUF_SIZE]; ssize_t bytes; while ((bytes = read(fd, file_buf, sizeof(file_buf))) > 0) { send(connfd, file_buf, bytes, 0); } /* 12. 关闭文件和连接，准备下一个循环 */ close(fd); close(connfd); } return 0; } <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> <html> <head> <meta http-equiv="Content-Type" content="text/html;charset=utf-8"> <title>Contact</title> <link rel="stylesheet" type="text/css" href="css/style_mobile.css"> <script language="javascript" type="text/javascript" src="js/jquery-1.9.1.min.js"></script> <script language="javascript" type="text/javascript" src="js/action.js"></script> </head> <body>

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