Linux——实现网站发布服务器

来源：互联网发布：图像高斯滤波算法编程编辑：程序博客网时间：2024/06/07 08:13

1、DNS工作原理
1、递归式
2、迭代式

网页发布服务器

1.查看系统的服务程序的状态：
service name status
启动服务：
service name start
关闭服务：
service name stop

2、Linux上html默认存放路径：
/var/www/html

http请求报头：

HTTP应答报文段：

网站发布服务器代码 httpd.c：

#include <stdio.h>#include <stdlib.h>#include <unistd.h>#include <string.h>#include <assert.h>#include <sys/types.h>#include <sys/socket.h>#include <arpa/inet.h>#include <fcntl.h>#include <sys/stat.h>void send_404(int c){char sendbuff[1024] = {0};strcpy(sendbuff, "HTTP/1.1 404 Not Found\r\n");strcat(sendbuff, "Server: myhttpd/1.0\r\n");strcat(sendbuff, "Content-Length: 14\r\n");strcat(sendbuff, "Content-Type: text/html;charset=gbk\r\n");strcat(sendbuff, "\r\n");strcat(sendbuff, "Page Not Found");send(c, sendbuff, strlen(sendbuff), 0);}void senderr(int c){send_404(c);}void send_success(int c, int fd){struct stat st;fstat(fd, &st);char sendbuff[1024] = {0};strcpy(sendbuff, "HTTP/1.1 200 OK\r\n");strcat(sendbuff, "Server: myhttpd/1.0\r\n");strcat(sendbuff, "Content-Length: ");sprintf(sendbuff+strlen(sendbuff), "%d", st.st_size);strcat(sendbuff, "\r\n");strcat(sendbuff, "Content-Type: text/html;charset=UTF-8\r\n");strcat(sendbuff, "\r\n");send(c, sendbuff, strlen(sendbuff), 0);//fa song wen jian nei rongwhile(1){char buff[10] = {0};int n = read(fd, buff, 9);if(n <= 0){break;}send(c, buff, n, 0);}close(fd);}void main(){int sockfd = socket(AF_INET, SOCK_STREAM, 0);assert(sockfd != -1);struct sockaddr_in ser, cli;memset(&ser, 0, sizeof(ser));ser.sin_family = AF_INET;ser.sin_port = htons(80);ser.sin_addr.s_addr = inet_addr("192.168.1.120");int res = bind(sockfd, (struct sockaddr*)&ser, sizeof(ser));assert(res != -1);listen(sockfd, 5);while(1){int len = sizeof(cli);int c = accept(sockfd, (struct sockaddr*)&cli, &len);assert(c != -1);printf("one client link\n");while(1){char buff[1024] = {0};int n = recv(c, buff, 1023, 0);if(n <= 0){break;}//printf("%s\n", buff);char *p = strtok(buff, " ");if(p == NULL){senderr(c);continue;}p = strtok(NULL, " ");if(p == NULL){senderr(c);continue;}char path[128] = "/var/www/html";strcat(path, p);int fd = open(path, O_RDONLY);if(fd == -1){send_404(c);continue;}//cheng gong, fa song ying da bao wen duan he wen jian nei rongsend_success(c, fd);}close(c);printf("one client unlink\n");}}

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