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C

client.c - a very crude web browser!

client.c fetches a single file and dumps it on the screen - so hopefully it is text. Hard coded are

  • the PORT = 8181
  • the IP_ADDRESS = 192.168.0.8
  • the GET request for file /index.html

Compile with

  • cc client.c -o client

Run with:

  • ./client

#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <string.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>

/* YOU WILL HAVE TO CHANGE THESE TWO LINES  TO MATCH YOUR CONFIG */
#define PORT        8181		/* Port number as an integer - web server default is 80 */
#define IP_ADDRESS "192.168.0.8"	/* IP Address as a string */

char *command = "GET /index.html HTTP/1.0 \r\n\r\n" ;
/* Note: spaces are delimiters and VERY important */

#define BUFSIZE 8196

pexit(char * msg)
{
	perror(msg);
	exit(1);
}

main()
{
int i,sockfd;
char buffer[BUFSIZE];
static struct sockaddr_in serv_addr;

	printf("client trying to connect to %s and port %d\n",IP_ADDRESS,PORT);
	if((sockfd = socket(AF_INET, SOCK_STREAM,0)) <0) 
		pexit("socket() failed");

	serv_addr.sin_family = AF_INET;
	serv_addr.sin_addr.s_addr = inet_addr(IP_ADDRESS);
	serv_addr.sin_port = htons(PORT);

	/* Connect tot he socket offered by the web server */
	if(connect(sockfd, (struct sockaddr *)&serv_addr, sizeof(serv_addr)) <0) 
		pexit("connect() failed");

	/* Now the sockfd can be used to communicate to the server the GET request */
	printf("Send bytes=%d %s\n",strlen(command), command);
	write(sockfd, command, strlen(command));

	/* This displays the raw HTML file (if index.html) as received by the browser */
	while( (i=read(sockfd,buffer,BUFSIZE)) > 0)
		write(1,buffer,i);
}
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Page last modified on July 26, 2016, at 07:54 AM