John Doe wrote:
Hi,
I have a little problem with my external_acl C program.
Everything works fine with a php version, but my original C version, for some tricky reason, does not...
Tested both from the console and they seem to behave exactly in the same way...
I am calling either program with the same syntax:
external_acl_type filter children=8 concurrency=0 ttl=0 negative_ttl=0 %PATH filter
The following in PHP works fine with squid:
while (!feof(STDIN)) {
$url = fgets(STDIN);
fwrite(STDERR, 'filter: url='.$url."\n");
fwrite(STDOUT, 'OK user=allowed'."\n");
fwrite(STDERR, 'filter: end of while...'."\n");
}
The following in C does not work well with squid:
while (fgets(url, sizeof(url), stdin)) {
// let's ignore the '\n' at the end of url, it only appear in the logs anyway...
fprintf(stderr, "filter: url=%s\n", url);
printf("OK user=allowed\n");
fprintf(stderr, "filter: end of while...\n");
}
With the C version, if I load a test page with 3 images going through squid, I will have the following in the squid_cache.log:
filter: url=/path/to/img1.gif
filter: end of while...
filter: url=/path/to/img2.gif
filter: end of while...
filter: url=/path/to/img3.gif
filter: end of while...
and then squid will just wait (for the 3 instances of my program?), blocking everything...
When I stop squid, I get 3 messages like:
WARNING: Closing client 192.168.16.23 connection due to lifetime timeout
2008/08/19 17:05:18| http://localhost/path/to/img1.gif
Any idea what is wrong with my C code...?
Thx,
JD
Sounds like you are having problems with output buffering. Try adding...
fflush(stdout);
...after your fprintf statement.
Chris
