#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <netinet/in.h>
#include <sys/socket.h> #define BUF_LEN 1028 // 1028 ever
#define PORT 8000
const static char html_re_hd_su[] = "HTTP/1.1 200 OK\r\nContent-type: text/html\r\n\r\n"; //html response header : success int CreatTcpSocket_fd(){
int socket_fd;
struct sockaddr_in address;
socket_fd = socket(AF_INET, SOCK_STREAM, 0); //tcp protocal
//catch up exception
if(socket_fd < 0){
printf("socket creation failed\n");
exit(1); // 1 means exit with exception
return 1;
} //step 2: bind the socket file description
memset(&address, 0, sizeof(address));
address.sin_family = AF_INET; //Internet protocal
address.sin_port = htons(PORT);
address.sin_addr.s_addr = INADDR_ANY; //set the host ip
if(bind(socket_fd, (struct sockaddr*)&address, sizeof(struct sockaddr_in))){
//catch up exception
printf("socket binding failed!\n");
exit(1);
return 1;
}
return socket_fd;
} void AnalyseTcpRequest(const int socket_fd){
char requestMessage[BUF_LEN];
read(socket_fd, requestMessage, BUF_LEN);
printf("%s\n", requestMessage);
} void ReplyTcpRequest(int socket_fd){
char replyMessage[]=
"<html><head><title>Welcome!</title></head>"
"<body><h1>Welcome to Feng YuBo HTTP server demo!</h1>"
"<p>This is a just small test page.</p></body></html>"; write(socket_fd, html_re_hd_su, strlen(html_re_hd_su));
write(socket_fd, replyMessage, strlen(replyMessage));
printf("replyed...\n");
} int main(){
int socket_fd = CreatTcpSocket_fd();
listen(socket_fd, 5); //max conection number is 5 now. //step 3: begin to accept tcp request
struct sockaddr_in their_address;
int their_sin_len = sizeof(struct sockaddr_in); for ( ; ; )
{
printf("begin to accept tcp request...\n");
//begin to block the processing
int newSocket_fd = accept(socket_fd, (struct sockaddr*)&their_address, &their_sin_len);
printf("analysing...\n");
AnalyseTcpRequest(newSocket_fd);
ReplyTcpRequest(newSocket_fd);
close(newSocket_fd);
} exit(0);
return 0;
}
目标： 1.接收HTTP请求 2.打印HTTP请求报文 3.返回HTTP响应报文 4.返回预设好的网页