Hi there!
Of *course* this is "cost effective" in C!! You just have to do a tiny
bit of sockets... C should be faster than an interpreted language,
although most of the delay for this sort of thing is probably due to the
speed of the network...
Attached is a rather simple example that I wrote real quickly... Seems to
get the job done though, just write it to stdout.
I found two other lightweight C programs on http://www.linuxapps.com (a
groovy Linux site)
They are:
* Swebget at http://www.uni-hildesheim.de/~smol0075/webget/
* Curl at http://www.fts.frontec.se/~dast/curl/
Curl is the biggest...
There are other programs like this under "Tools" under the "Web" section
on linuxapps.com; GNU wget, written in C as well, is there and does
recursive mirroring...
Hope this helps! :)
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <sys/stat.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <sys/wait.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <string.h>
#include <fcntl.h>
#include <errno.h>
#include <netdb.h>
#define HOST "sunsite.unc.edu"
#define PATH "/pub/" /* Notice the leading slash, 'tis required */
void die(char *s);
main()
{
char buf[512];
int n = 1;
int sock;
struct sockaddr_in si;
struct hostent *host;
if ((sock = socket(AF_INET, SOCK_STREAM, 0)) < 0)
die("Couldn't get a socket!");
bzero(&si, sizeof(si));
host = gethostbyname(HOST);
printf("addr = \"%s\"\nname = \"%s\"\n",
inet_ntoa(host->h_addr),
host->h_name);
si.sin_family = AF_INET;
bcopy(host->h_addr, (char *) &si.sin_addr, host->h_length);
si.sin_port = htons(80);
if (connect(sock, (struct sockaddr*) &si, sizeof(si)) < 0)
die("Eek! Couldn't connect!");
if (fcntl(sock, F_SETFL, O_NONBLOCK) < 0)
die("fcntl error!");
sprintf(buf, "GET " PATH "\n\n");
write(sock, buf, strlen(buf));
for(;;) {
n = read(sock, buf, 512);
if (n < 0) {
if (errno == EAGAIN) {
errno = 0;
continue;
}
else {
perror("read");
break;
}
}
else if (!n)
die("all done!");
else if (n) {
write(0, buf, n);
}
}
}
void die(char *s)
{
puts(s);
exit(1);
}
