[Resolved] Fopen

guest

im usings

error_reporting(0); //stops stupid errors
$url = $r[link];
if (!($fp=fopen($url, 'r'))){
$status = "<font color=red>Offline</font>";
}else{$status = "<font color=green>Online</font>";}

to see if links are up or down and i was wondering if there is a timelimit i could add so that if it takes longer than 3 seconds to load it would just automatically says its down

drew010

you can use [man]fsockopen[/man] with a timeout set to 3 seconds, but not with fopen.

$fp = @fsockopen("www.host.com", 80, $errno, $errstr, 3);
if (!$fp) {
  echo "down";
} else {
  echo "up";
}

guest

no but im trying to check if the acual link to the file works, not the host

with fopen i was getting what i needed but fsockopen doesnt seem to work for checking files on the site

drew010

you could then issue a basic http request for the file, and check the response code for a 400 not found or a 200 okay

guest

"issue a basic http request for the file"
could you show me some examples

drew010

$url = $r[link];
$parts = parse_url($url);

$fp = @fsockopen($parts['host'], 80, $errno, $errstr, 3);

if (!$fp) {
  echo "down";
} else {
  $req = "HEAD " . $parts['path'] . " HTTP/1.1\r\n"
        ."Host: " . $parts['host'] . "\r\n"
        ."Connection: Close\r\n\r\n";

  fputs($fp, $req);

  while (!feof($fp)) {
    $response .= fgets($fp);
  }

  $lines = explode("\r\n", $response);

  if (!preg_match("/HTTP\/1\.1 2\d{2} OK/i", $lines[0])) {
    echo "down";
  } else {
    echo "good";
  }
}

i tested it on a few real urls, 404's and inexistant hostnames, seems to work well.

guest

Ok it seems to be workign, thanks

but the timeout of 3 seconds not connecting to the server isnt counting right

$fp = @fsockopen($parts['host'], 80, $errno, $errstr, 3);

im guessing the 3 is the 3 seconds?

another questing do i need anything on the page to be "$errno =" or "$errstr=" ????

what i did is make

$url = $_GET["url"];

and the url is "http://www.zymic.com/images/ad.gif" and i know that takes more than the 3 seconds to load but the script keeps on loading until it connects and says "good"

drew010

ok i played around a bit with stream_set_timeout since the timeout in the fsockopen function only applies to connecting to the host and not reading and writing over a slow connection.

since it could possibly take 2 seconds to connect, and then another 3 for the timeout that leaves you at 5 seconds, so thats why in the stream_set_timeout i used a 2 instead of 3, just to reduce the time. but this works too.

<?php

$url = "http://www.zymic.com/images/ad.gif";
$parts = parse_url($url);

$fp = @fsockopen($parts['host'], 80, $errno, $errstr, 3);

if (!$fp) {
  echo "down";
} else {
  $req = "HEAD " . $parts['path'] . " HTTP/1.1\r\n"
        ."Host: " . $parts['host'] . "\r\n"
        ."Connection: Close\r\n\r\n";


  fwrite($fp, $req);
  stream_set_timeout($fp, 2);
  $info = stream_get_meta_data($fp);

  while (!feof($fp) && !$info['timed_out']) {
    $info = stream_get_meta_data($fp);
    $response .= fgets($fp);
  }
  $info = stream_get_meta_data($fp);
  fclose($fp);

  if (!$info['timed_out']) {
    $lines = explode("\r\n", $response);

if (!preg_match("/HTTP\/1\.\d 2\d{2} OK/i", $lines[0])) {
  echo "down";
} else {
  echo "good";
}
  } else {
    echo "timed out";
  }
}

?>

guest

Thanks Dude, helped a lot

good job w/ your php 🙂 wish i knew more