web.c

#include <stdio.h>
#include <netinet/in.h>
#include <sys/socket.h>
#include <sys/types.h>
#include <unistd.h>
#include <string.h>
#include <stdlib.h>
#include <fcntl.h>
#include <sys/shm.h>
#include <signal.h>

#define PROT 8888
#define SERV "0.0.0.0"
#define QUEUE 20
#define BUFF_SIZE 1024

typedef struct doc_type {
	char *key;
	char *value;
} HTTP_CONTENT_TYPE;

HTTP_CONTENT_TYPE http_content_type[] = {
	{"http", "text/html" },
	{"gif",  "image/gif" },
	{ "jpeg","image/jpeg"}
};

int sockfd;
char *http_res_tmpl = "HTTP/1.1 200 OK\r\n"
		"Server: Mason's Server\r\n"
		"Accept-Ranges: bytes\r\n"
		"Content-Length: %d\r\n"
		"Connection: close\r\n"
		"Content-Type: %s\r\n\r\n";

void handle_signal(int sign);
void http_send(int sock, char *content);

int main()
{
	signal(SIGINT, handle_signal);

	int count = 0;

	sockfd = socket(AF_INET, SOCK_STREAM, 0);
	
	struct sockaddr_in  skaddr;

	skaddr.sin_family = AF_INET;
	skaddr.sin_port   = htons(PROT);
	skaddr.sin_addr.s_addr = inet_addr(SERV);

	if (bind(sockfd, (struct sockaddr *)&skaddr, sizeof(skaddr)) < 0) {
		perror("bind error");
		exit(1);
	}

	if (listen(sockfd, QUEUE) < 0) {
		perror("listen error");
		exit(1);
	}

	char buff[BUFF_SIZE];
	struct sockaddr_in claddr;
	socklen_t length = sizeof(claddr);

	while(1) {
		int sock_client = accept(sockfd, (struct sockaddr *)&claddr, &length); 
		printf("%d \n", ++count);
		if (sock_client < 0) {
			perror("acccpt error");
			exit(1);
		}
		memset(buff, 0, sizeof(buff));
		int len = recv(sock_client, buff, sizeof(buff), 0);
		fputs(buff, stdout);
		http_send(sock_client, "Hello world!");
		close(sock_client);
	}
	fputs("Bye Mason", stdout);
	close(sockfd);
	return 0;
}

void http_send(int sock_client, char *content) 
{
	char HTTP_HEADER[BUFF_SIZE], HTTP_INFO[BUFF_SIZE];
	int len  = strlen(content);

	sprintf(HTTP_HEADER, http_res_tmpl, len, "text/html");
	len = sprintf(HTTP_INFO, "%s%s", HTTP_HEADER, content);

	send(sock_client, HTTP_INFO, len, 0);
}

void handle_signal(int sign)
{
	fputs("\nSIGNAL INTERUPT \n Bye Mason \nSAFE EXIT\n", stdout);
	close(sockfd);
	exit(0);
}