struct wget_timer *
wtimer_new (void)
{
struct wget_timer *wt = wtimer_allocate ();
wtimer_reset (wt);
return wt;
}
/* Reads the contents of file descriptor FD, until it is closed, or a
read error occurs. The data is read in 8K chunks, and stored to
stream fp, which should have been open for writing. If BUF is
non-NULL and its file descriptor is equal to FD, flush RBUF first.
This function will *not* use the rbuf_* functions!
The EXPECTED argument is passed to show_progress() unchanged, but
otherwise ignored.
If opt.verbose is set, the progress is also shown. RESTVAL
represents a value from which to start downloading (which will be
shown accordingly). If RESTVAL is non-zero, the stream should have
been open for appending.
The function exits and returns codes of 0, -1 and -2 if the
connection was closed, there was a read error, or if it could not
write to the output stream, respectively.
IMPORTANT: The function flushes the contents of the buffer in
rbuf_flush() before actually reading from fd. If you wish to read
from fd immediately, flush or discard the buffer. */
int
get_contents (int fd, FILE *fp, long *len, long restval, long expected,
struct rbuf *rbuf, int use_expected, long *elapsed)
{
int res = 0;
static char c[8192];
void *progress = NULL;
struct wget_timer *timer = wtimer_allocate ();
long dltime = 0, last_dltime = 0;
*len = restval;
if (opt.verbose)
progress = progress_create (restval, expected);
if (rbuf && RBUF_FD (rbuf) == fd)
{
int sz = 0;
while ((res = rbuf_flush (rbuf, c, sizeof (c))) != 0)
{
fwrite (c, sizeof (char), res, fp);
*len += res;
sz += res;
}
if (sz)
fflush (fp);
if (ferror (fp))
{
res = -2;
goto out;
}
if (opt.verbose)
progress_update (progress, sz, 0);
}
if (opt.limit_rate)
limit_bandwidth_reset ();
wtimer_reset (timer);
/* Read from fd while there is available data.
Normally, if expected is 0, it means that it is not known how
much data is expected. However, if use_expected is specified,
then expected being zero means exactly that. */
while (!use_expected || (*len < expected))
{
int amount_to_read = (use_expected
? MIN (expected - *len, sizeof (c))
: sizeof (c));
#ifdef HAVE_SSL
if (rbuf->ssl!=NULL)
res = ssl_iread (rbuf->ssl, c, amount_to_read);
else
#endif /* HAVE_SSL */
res = iread (fd, c, amount_to_read);
if (res > 0)
{
fwrite (c, sizeof (char), res, fp);
/* Always flush the contents of the network packet. This
should not be adverse to performance, as the network
packets typically won't be too tiny anyway. */
fflush (fp);
if (ferror (fp))
{
res = -2;
goto out;
}
/* If bandwidth is not limited, one call to wtimer_elapsed
is sufficient. */
dltime = wtimer_elapsed (timer);
if (opt.limit_rate)
{
limit_bandwidth (res, dltime - last_dltime);
dltime = wtimer_elapsed (timer);
last_dltime = dltime;
}
if (opt.verbose)
progress_update (progress, res, dltime);
*len += res;
}
else
break;
}
if (res < -1)
res = -1;
out:
if (opt.verbose)
progress_finish (progress, dltime);
if (elapsed)
*elapsed = dltime;
wtimer_delete (timer);
return res;
}