http.c
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/* GNU Mailutils -- a suite of utilities for electronic mail
Copyright (C) 1999, 2000, 2001, 2004 Free Software Foundation, Inc.
GNU Mailutils is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2, or (at your option)
any later version.
GNU Mailutils is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with GNU Mailutils; if not, write to the Free Software
Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
MA 02110-1301 USA */
/* This is an example program to illustrate the use of stream functions.
It connects to a remote HTTP server and prints the contents of its
index page */
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <errno.h>
#include <unistd.h>
#include <mailutils/mailutils.h>
const char *wbuf = "GET / HTTP/1.0\r\n\r\n";
char rbuf[1024];
int
main (void)
{
int ret, off = 0;
stream_t stream;
size_t nb;
ret = tcp_stream_create (&stream, "www.gnu.org", 80, MU_STREAM_NONBLOCK);
if (ret != 0)
{
mu_error ("tcp_stream_create: %s", mu_strerror (ret));
exit (EXIT_FAILURE);
}
connect_again:
ret = stream_open (stream);
if (ret != 0)
{
if (ret == EAGAIN)
{
int wflags = MU_STREAM_READY_WR;
stream_wait (stream, &wflags, NULL);
goto connect_again;
}
mu_error ("stream_open: %s", mu_strerror (ret));
exit (EXIT_FAILURE);
}
write_again:
ret = stream_write (stream, wbuf + off, strlen (wbuf), 0, &nb);
if (ret != 0)
{
if (ret == EAGAIN)
{
int wflags = MU_STREAM_READY_WR;
stream_wait (stream, &wflags, NULL);
off += nb;
goto write_again;
}
mu_error ("stream_write: %s", mu_strerror (ret));
exit (EXIT_FAILURE);
}
if (nb != strlen (wbuf))
{
mu_error ("stream_write: %s", "nb != wbuf length");
exit (EXIT_FAILURE);
}
do
{
ret = stream_read (stream, rbuf, sizeof (rbuf), 0, &nb);
if (ret != 0)
{
if (ret == EAGAIN)
{
int wflags = MU_STREAM_READY_RD;
stream_wait (stream, &wflags, NULL);
}
else
{
mu_error ("stream_read: %s", mu_strerror (ret));
exit (EXIT_FAILURE);
}
}
write (1, rbuf, nb);
}
while (nb || ret == EAGAIN);
ret = stream_close (stream);
if (ret != 0)
{
mu_error ("stream_close: %s", mu_strerror (ret));
exit (EXIT_FAILURE);
}
stream_destroy (&stream, NULL);
exit (EXIT_SUCCESS);
}