nieldeokar/Apache_Server.c

## Apache_Server.c
/*
*  @author : Nilesh Deokar/ @nieldeokar
*  instructions :
*  1. compile using 'gcc -Wall -o apache Apache_Server.c'
*  2. run ./apache
*/
#include <stdio.h>
#include <unistd.h>
#include <errno.h>
#include <string.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <netdb.h>
#include <arpa/inet.h>
#include <stdlib.h>

#define PORT  8080

char good_response_header[] = "HTTP/1.1 200 OK\r\n"
"Content-Length: %d\r\n"
"Content-Type: text/html; charset=UTF-8\r\n\r\n";

char good_response_body[] = "<!DOCTYPE HTML>"
"<html><head>"
"<title>@nieldeokar | Apache</title>"
"</head><body>"
"<h1>Apache Response</h1>"
"<p>%s"
"%s </br>"
"<font color=\"red\">%s </font></br></p>"
"</body></html>";


int main(int argc, char **argv) {
    int req_bind , sockfd;
    struct sockaddr_in serv_ip_address;

    if((sockfd = socket(PF_INET, SOCK_STREAM, IPPROTO_TCP)) == -1){
            printf("Could not create socket (%s)\n",strerror(sockfd));
    return 0; }

  	serv_ip_address.sin_family = AF_INET;  // bind and listen
    serv_ip_address.sin_addr.s_addr = INADDR_ANY;
    serv_ip_address.sin_port = htons(PORT);
    if ((req_bind  = bind(sockfd, (struct sockaddr *)&serv_ip_address, sizeof(serv_ip_address))) < 0){
       printf("Error occurred during binding (%s)\n",strerror(req_bind));
      return 0; }
    printf("Apache Listening on port %d\n", PORT);
    listen(sockfd,10);
    while(1) {  // loop for connections
        struct sockaddr_in cli_ip_address, host_address;
        socklen_t ip_len = sizeof(cli_ip_address);
        int cli_fd = accept(sockfd, (struct sockaddr *) &cli_ip_address, &ip_len);
        if (cli_fd < 0){
          printf("Error occurred during accept :%s\n",strerror(sockfd));
          return 0; }

        if(fork()>1){
        	ip_len = sizeof(host_address);
        	getsockname(cli_fd, (struct sockaddr *)&host_address, &ip_len);
        	char line1[1024], line2[1024], line3[400];
        	sprintf(line1," Incoming client connection from [%s:%d]", inet_ntoa(cli_ip_address.sin_addr), cli_ip_address.sin_port); // get client ip:PORT
        	sprintf(line2," to server [%s:%d]\n", inet_ntoa(host_address.sin_addr), htons(serv_ip_address.sin_port));
        	sprintf(line3,"Client socket id : %d \n", cli_fd);
        	printf("%s %s %s", line1,line2,line3);

        	char formatted_body[4096];
        	char formatted_header[1024];
        	sprintf(formatted_body,good_response_body,line1,line2,line3);
        	sprintf(formatted_header,good_response_header,strlen(formatted_body));
        	char response[strlen(formatted_body) + strlen(formatted_header)];
		strcpy(response,formatted_header);
		strcat(response,formatted_body);

        	write(cli_fd, response, strlen(response));
        	close(cli_fd);

    		}
        }
    return 0;
}
	/*
	* @author : Nilesh Deokar/ @nieldeokar
	* instructions :
	* 1. compile using 'gcc -Wall -o apache Apache_Server.c'
	* 2. run ./apache
	*/
	#include <stdio.h>
	#include <unistd.h>
	#include <errno.h>
	#include <string.h>
	#include <sys/types.h>
	#include <sys/socket.h>
	#include <netdb.h>
	#include <arpa/inet.h>
	#include <stdlib.h>

	#define PORT 8080

	char good_response_header[] = "HTTP/1.1 200 OK\r\n"
	"Content-Length: %d\r\n"
	"Content-Type: text/html; charset=UTF-8\r\n\r\n";

	char good_response_body[] = "<!DOCTYPE HTML>"
	"<html><head>"
	"<title>@nieldeokar \| Apache</title>"
	"</head><body>"
	"<h1>Apache Response</h1>"
	"<p>%s"
	"%s </br>"
	"<font color=\"red\">%s </font></br></p>"
	"</body></html>";


	int main(int argc, char **argv) {
	int req_bind , sockfd;
	struct sockaddr_in serv_ip_address;

	if((sockfd = socket(PF_INET, SOCK_STREAM, IPPROTO_TCP)) == -1){
	printf("Could not create socket (%s)\n",strerror(sockfd));
	return 0; }

	serv_ip_address.sin_family = AF_INET; // bind and listen
	serv_ip_address.sin_addr.s_addr = INADDR_ANY;
	serv_ip_address.sin_port = htons(PORT);
	if ((req_bind = bind(sockfd, (struct sockaddr *)&serv_ip_address, sizeof(serv_ip_address))) < 0){
	printf("Error occurred during binding (%s)\n",strerror(req_bind));
	return 0; }
	printf("Apache Listening on port %d\n", PORT);
	listen(sockfd,10);
	while(1) { // loop for connections
	struct sockaddr_in cli_ip_address, host_address;
	socklen_t ip_len = sizeof(cli_ip_address);
	int cli_fd = accept(sockfd, (struct sockaddr *) &cli_ip_address, &ip_len);
	if (cli_fd < 0){
	printf("Error occurred during accept :%s\n",strerror(sockfd));
	return 0; }

	if(fork()>1){
	ip_len = sizeof(host_address);
	getsockname(cli_fd, (struct sockaddr *)&host_address, &ip_len);
	char line1[1024], line2[1024], line3[400];
	sprintf(line1," Incoming client connection from [%s:%d]", inet_ntoa(cli_ip_address.sin_addr), cli_ip_address.sin_port); // get client ip:PORT
	sprintf(line2," to server [%s:%d]\n", inet_ntoa(host_address.sin_addr), htons(serv_ip_address.sin_port));
	sprintf(line3,"Client socket id : %d \n", cli_fd);
	printf("%s %s %s", line1,line2,line3);

	char formatted_body[4096];
	char formatted_header[1024];
	sprintf(formatted_body,good_response_body,line1,line2,line3);
	sprintf(formatted_header,good_response_header,strlen(formatted_body));
	char response[strlen(formatted_body) + strlen(formatted_header)];
	strcpy(response,formatted_header);
	strcat(response,formatted_body);

	write(cli_fd, response, strlen(response));
	close(cli_fd);

	}
	}
	return 0;
	}