说明：暂时只是实现了静态网页的响应
?1 #include <stdio.h> ?2 #include <sys/types.h> ?????????/* See NOTES */ ?3 #include <sys/socket.h> ?4 #include <string.h> ?5 #include <arpa/inet.h> ?6 #include <unistd.h> ?7 #include <signal.h> ?8 #include <sys/wait.h> ?9 #include <sys/stat.h> 10 #include <fcntl.h> 11 #include <stdlib.h> 12 ?13 #define PORT 8000 14 char* msg_err="HTTP/1.1 404 NO FOUND\r\nContent-Type:text/html\r\n\r\n"; 15 char* msg_text="HTTP/1.1 200 OK\r\nContent-Type:text/html\r\n\r\n"; 16 char* msg_jpg="HTTP/1.1 200 OK\r\nContent-Type:image/jpg\r\n\r\n"; 17 char* msg_png="HTTP/1.1 200 OK\r\nContent-Type:image/png\r\n\r\n"; 18 char* work_dir="/home/soft01/Hector/Unixc/webProject/hah/www"; 19 char* work_dir_err="/home/soft01/Hector/Unixc/webProject/hah/err_404.html"; 20 ?21 //定义http协议 结构体 22 typedef struct http{ 23 ????char method[12]; ??24 ????char filename[128]; 25 ????char protol[16]; 26 }utr_t; 27 ?28 //自定义信号处理函数 29 //回收子进程 30 void sig_do(){ 31 ????wait(NULL); 32 ????return; 33 } 34 ?35 //响应 36 void write_client(char* str,int fd,char* msg){ 37 ????char status[100000]; 38 ????int fd_open=open(str,O_RDONLY); 39 ????if(fd_open==-1){ 40 ????????perror("open"); 41 ????????int fd_open=open(work_dir_err,O_RDONLY); 42 ????????int nlen=read(fd_open,status,100000); 43 ????????write(fd,msg_err,strlen(msg_err)); 44 ????????write(fd,status,nlen); 45 ????????return; 46 ????} 47 ????int nlen=read(fd_open,status,100000); 48 ????write(fd,msg,strlen(msg)); 49 ????write(fd,status,nlen); 50 ????return; 51 } 52 ?53 //判断图片文本 54 void judge_text_or_png(char* str,int fd){ 55 ????char* msg="<html>\n<body>\n<h1>404\n</body>\n</html>\n"; 56 ????if(str==NULL){return;} 57 ????char* tmp=NULL; 58 ????if((tmp=strstr(str,".jpg"))!=NULL){ 59 ????????write_client(str,fd,msg_jpg); 60 ????} 61 ????else if((tmp=strstr(str,".png"))!=NULL){ 62 ????????write_client(str,fd,msg_png); 63 ????} 64 ????else if((tmp=strstr(str,".html"))!=NULL){//文本 65 ????????write_client(str,fd,msg_text); 66 ????} 67 ????else{ 68 ????????write(fd,msg_err,strlen(msg_err)); 69 ????????write(fd,msg,strlen(msg)); 70 ????} 71 ????return; 72 } 73 ?74 //子进程响应客户端 75 void request_do(int fd){ 76 ????utr_t http; 77 ????char path[128]; 78 ????char buf[1024]; 79 ????int len=read(fd,buf,1024); 80 ????sscanf(buf,"%s %s %s\r\n",http.method,http.filename,http.protol); 81 ????if(strcmp(http.filename,"/")==0){ 82 ????????strcpy(http.filename,"/index.html"); 83 ????} 84 ?85 ????strcpy(path,work_dir); 86 ????strcat(path,http.filename); 87 ????strcpy(http.filename,path); 88 ????printf("method:%s filename:%s protol:%s\n", http.method,http.filename,http.protol); 89 ?????90 ????//判断图片文本 91 ????judge_text_or_png(http.filename,fd); 92 ?????93 ????return; 94 } 95 ?96 int main(){ 97 ????struct sockaddr_in serv; 98 ????struct sockaddr_in clie; 99 ????socklen_t clie_len;100 ????signal(SIGCHLD,sig_do);101 ????//创建socket通讯端口102 ????int sfd=socket(AF_INET,SOCK_STREAM,0);103 ????if(sfd==-1){104 ????????perror("socket");105 ????????return -1;106 ????}107 ????108 ????//初始化服务器serv109 ????serv.sin_family=AF_INET;110 ????serv.sin_port=htons(PORT);111 ????serv.sin_addr.s_addr=htonl(INADDR_ANY);112 ????//将sfd绑定到服务器113 ????int b=bind(sfd,(struct sockaddr*)&serv,sizeof(serv));114 ????if(b==-1){115 ????????perror("bind");116 ????????return -1;117 ????}118 ????listen(sfd,10);119 ????while(1){120 ????????clie_len=sizeof(clie);121 ????????//建立和客户端的连接122 ????????int cfd=accept(sfd,(struct sockaddr*)&clie,&clie_len);123 ????????if(cfd==-1){124 ????????????perror("accept");125 ????????????return -1;126 ????????}127 ????????pid_t pid=fork();128 ????????if(pid==-1){129 ????????????perror("pid");130 ????????????return -1;131 ????????}132 ????????if(pid==0){//子进程133 ????????????close(sfd);134 ????????????//响应客户端请求135 ????????????request_do(cfd);136 ????????????close(cfd);137 ????????????exit(0);138 ????????}139 ????????else{//父进程140 ????????????close(cfd);141 ????????}142 143 ????}144 ????return 0;145 }Linux下实现web服务器
原文地址：https://www.cnblogs.com/qiuyuwutong/p/9385339.html