From 25778ef80fedaefaf16cea3a75dc554cfe7e2376 Mon Sep 17 00:00:00 2001
From: Urban Müller
Date: Wed, 17 Jan 2007 19:05:11 +0000
Subject: it::error: fewer alerts, better performance

---
 it.class  | 36 +++++++++++++++++++++++++++---------
 url.class |  2 +-
 2 files changed, 28 insertions(+), 10 deletions(-)

diff --git a/it.class b/it.class
index 5757b4f..588d279 100644
--- a/it.class
+++ b/it.class
@@ -66,10 +66,12 @@ function timerlog($label = '')
  * @param $to (optional) comma separated recipient list
  * @param named parameter ok indicates no error happened
  * @param named parameter ok_key indicates which variable to store failure counts in
- * @param named parameter ok_delay gives number of seconds in which consecutive failures dont count
+ * @param named parameter ok_maxfail number of failures needed for alert; default 2. only 1 failure per 60 seconds counted
  */
 function error($p=array(), $body='', $to='')
 {
+	$p += array('ok_key' => "it_error", 'ok_maxfail' => 2);
+
 	if (is_array($p)) {
 		$title = $p['title'];
 		$body = $p['body'];
@@ -82,22 +84,38 @@ function error($p=array(), $body='', $to='')
 	if (!$to)
 		$to = strtr(trim(@file_get_contents($GLOBALS['ULTRAHOME'] . "/.diffnotice")), array("\n"=>',', ' '=>''));
 
-	if ($p['ok']) {
-		system("alert -o " . escapeshellarg($p['ok_key']) . "=1" . escapeshellarg($to) . " 4 'everything ok'");
-	} else {
+	if (!isset($p['ok']))
+		$sendalert = true;
+	else {
+		$counterfn = $GLOBALS['ULTRAHOME'] . "/tmp/" . urlencode($p['ok_key']);
+		if (time() - @filemtime($counterfn) >= 60) { # only modify counter if unmodified for 60 secs
+			$oldcounter = intval(@file_get_contents($counterfn));
+			$newcounter = $p['ok'] ? 0 : $oldcounter + 1;
+			if ($newcounter != $oldcounter) {
+				$fh = fopen($counterfn, "w");
+				fputs($fh, "$newcounter\n");
+				fclose($fh);
+
+				if ($newcounter >= $p['ok_maxfail'] && (time() - @filemtime("$counterfn.mailsent")) >= 86400) { # 1 mail per day
+					$sendalert = true;
+					if (!ereg('twin|devel', $GLOBALS['ULTRASERVERTYPE']))
+						touch("$counterfn.mailsent");
+				}
+			}
+		}
+	}
+
+	if ($sendalert) {
 		$url = ($_SERVER['HTTPS'] ? "https://" : "http://") . $_SERVER['HTTP_HOST'] .$_SERVER['REQUEST_URI'];
-		$referer = $_SERVER['HTTP_REFERER'];
 		if (!$title)
 			$title="Error in $url";
 
-		$body .= "\nUrl: $url\n\nReferer: $referer\n\n\$_REQUEST: ".print_r($_REQUEST, true). "\nStack:\n" . print_r(array_slice(debug_backtrace(), 1), true) . "\n\$_SERVER: " . print_r($_SERVER, true);
+		$body .= "\nUrl: $url\n\n\$_REQUEST: ".print_r($_REQUEST, true). "\nStack:\n" . print_r(array_slice(debug_backtrace(), 1), true) . "\n\$_SERVER: " . print_r($_SERVER, true);
 
 		if (ereg('twin|devel', $GLOBALS['ULTRASERVERTYPE'])) {
 			echo "<pre>$title\n$body\n</pre>";
 		} else {
-			$okdelay = $p['ok_delay'] ? "-d " . escapeshellarg($p['ok_delay']) : "";
-			$okmode = $p['ok_key'] ? "-o " . escapeshellarg($p['ok_key']) . "=0" : "";
-			$cmd = "alert $okdelay $okmode -l " . escapeshellarg($to) . " 4 " . escapeshellarg($title);
+			$cmd = "alert -l " . escapeshellarg($to) . " 4 " . escapeshellarg($title);
 
 			EDC('exec', $cmd);
 			if (($pipe = popen($cmd, "w"))) {
diff --git a/url.class b/url.class
index ebe42a5..c1be258 100644
--- a/url.class
+++ b/url.class
@@ -363,7 +363,7 @@ function get_cache($p = array())
 		if (($parts = parse_url($p['url'])) === false)
 			it::error('malformed url ' . $p['url']);
 		if ($p['safety'] == 1)
-			it::error(array('title'=>"get_cache: download failures on $path", 'ok_key'=>md5($parts['host']), 'ok_delay'=>$p['maxage'], 'ok'=>$result ? 1 : 0)); # send err only if multi failure
+			it::error(array('title'=>"get_cache: download failures on {$p['url']}", 'ok_key'=>"ok_".$parts['host'], 'ok'=>$result ? 1 : 0)); # send err only if multi failure
 		@unlink("$path.lock");
 	}
 
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