c语言怎么写web服务器

要使用C语言编写一个Web服务器，你需要了解HTTP协议、套接字编程以及多线程等技术，下面是一个简单的C语言Web服务器的实现过程：,1、需要包含一些必要的头文件：,2、定义常量和全局变量：,3、创建套接字并绑定地址：,4、创建线程处理客户端连接：,
,#include <stdio.h> #include <stdlib.h> #include <string.h> #include <unistd.h> #include <arpa/inet.h> #include <sys/socket.h> #include <netinet/in.h> #include <pthread.h>,#define PORT 8080 #define BUFFER_SIZE 4096 #define MAX_CONNECTIONS 5 int server_fd, client_fd; struct sockaddr_in server_addr, client_addr; pthread_t thread_id; int client_count = 0;,server_fd = socket(AF_INET, SOCK_STREAM, 0); memset(&server_addr, 0, sizeof(server_addr)); server_addr.sin_family = AF_INET; server_addr.sin_addr.s_addr = INADDR_ANY; server_addr.sin_port = htons(PORT); bind(server_fd, (struct sockaddr *)&server_addr, sizeof(server_addr)); listen(server_fd, MAX_CONNECTIONS);,void *handle_client(void *arg) { int client_socket = *((int *)arg); char buffer[BUFFER_SIZE]; char oldPath[1024] = {0}; char newPath[1024] = {0}; ssize_t bytesRead; char fileName[1024] = {0}; char fileType[1024] = {0}; char fullPath[1024] = {0}; char response[BUFFER_SIZE] = “HTTP/1.1 200 OKr ContentType: text/htmlr r “; char errorResponse[BUFFER_SIZE] = “HTTP/1.1 404 Not Foundr ContentType: text/htmlr r “; char defaultPage[] = “<!DOCTYPE html><html><head><title>Welcome</title></head><body><h1>Welcome to my web server!</h1></body></html>”; char indexPage[] = “<!DOCTYPE html><html><head><title>Index</title></head><body><h1>Index page</h1></body></html>”; char aboutPage[] = “<!DOCTYPE html><html><head><title>About</title></head><body><h1>About page</h1></body></html>”; char notFoundPage[] = “<!DOCTYPE html><html><head><title>Not Found</title></head><body><h1>404 Not Found</h1></body></html>”; sprintf(fullPath, “%s/%s”, oldPath, fileName); // Full path of the requested file if (access(fullPath, F_OK) == 0) { // File exists, serve it bytesRead = read(client_socket, buffer, sizeof(buffer) 1); // Read request from client if (strncmp(buffer, “GET”, 3) == 0) { // If request is a GET request sscanf(buffer, “GET %s HTTP/1.1”, fileName); // Get requested file name from request line if (strcmp(fileName, “/”) == 0) { // If requested file is root directory index page strcpy(response, indexPage); // Set response as index page HTML content } else if (strcmp(fileName, “/about”) == 0) { // If requested file is about page strcpy(response, aboutPage); // Set response as about page HTML content } else { // If requested file is other than root directory or about page, serve it as static file if (strstr(fileName, “.”)) { // If requested file has extension, set response as error response (404 Not Found) and send default page instead of requested file to avoid serving potentially harmful files with extensions like .php, .js, etc. strcpy(response, errorResponse); // Set response as error response (404 Not Found) HTML content send(client_socket, defaultPage, strlen(defaultPage), 0); // Send default page to client instead of requested file to avoid serving potentially harmful files with extensions like .php, .js, etc. } else { // If requested file has no extension, set response as error response (404 Not Found) and send default page instead of requested file to avoid serving potentially harmful files with extensions like .php, .js, etc. and also to avoid serving directory listings which can reveal sensitive information about the server’s files and directories structure and contents if directory listing is enabled on the server for some reason like by mistake or intentionally for testing purposes or something else.,

c语言怎么写web服务器

相关推荐

热门文章