1 files changed, 113 insertions, 0 deletions
diff --git a/lib/SimpleSAML/Logger/FileLoggingHandler.php b/lib/SimpleSAML/Logger/FileLoggingHandler.php
new file mode 100644
index 0000000..a0a1280
--- /dev/null
+++ b/lib/SimpleSAML/Logger/FileLoggingHandler.php
@@ -0,0 +1,113 @@
+<?php
+
+namespace SimpleSAML\Logger;
+
+use SimpleSAML\Logger;
+
+/**
+ * A logging handler that dumps logs to files.
+ *
+ * @author Lasse Birnbaum Jensen, SDU.
+ * @author Andreas Åkre Solberg, UNINETT AS. <andreas.solberg@uninett.no>
+ * @package SimpleSAMLphp
+ */
+class FileLoggingHandler implements LoggingHandlerInterface
+{
+
+    /**
+     * A string with the path to the file where we should log our messages.
+     *
+     * @var null|string
+     */
+    protected $logFile = null;
+
+    /**
+     * This array contains the mappings from syslog log levels to names. Copied more or less directly from
+     * SimpleSAML_Logger_LoggingHandlerErrorLog.
+     */
+    private static $levelNames = array(
+        Logger::EMERG   => 'EMERGENCY',
+        Logger::ALERT   => 'ALERT',
+        Logger::CRIT    => 'CRITICAL',
+        Logger::ERR     => 'ERROR',
+        Logger::WARNING => 'WARNING',
+        Logger::NOTICE  => 'NOTICE',
+        Logger::INFO    => 'INFO',
+        Logger::DEBUG   => 'DEBUG',
+    );
+    protected $processname = null;
+    protected $format;
+
+
+    /**
+     * Build a new logging handler based on files.
+     */
+    public function __construct(\SimpleSAML_Configuration $config)
+    {
+        // get the metadata handler option from the configuration
+        $this->logFile = $config->getPathValue('loggingdir', 'log/').
+            $config->getString('logging.logfile', 'simplesamlphp.log');
+        $this->processname = $config->getString('logging.processname', 'SimpleSAMLphp');
+
+        if (@file_exists($this->logFile)) {
+            if (!@is_writeable($this->logFile)) {
+                throw new \Exception("Could not write to logfile: ".$this->logFile);
+            }
+        } else {
+            if (!@touch($this->logFile)) {
+                throw new \Exception(
+                    "Could not create logfile: ".$this->logFile.
+                    " The logging directory is not writable for the web server user."
+                );
+            }
+        }
+
+        \SimpleSAML\Utils\Time::initTimezone();
+    }
+
+
+    /**
+     * Set the format desired for the logs.
+     *
+     * @param string $format The format used for logs.
+     */
+    public function setLogFormat($format)
+    {
+        $this->format = $format;
+    }
+
+
+    /**
+     * Log a message to the log file.
+     *
+     * @param int    $level The log level.
+     * @param string $string The formatted message to log.
+     */
+    public function log($level, $string)
+    {
+        if (!is_null($this->logFile)) {
+            // set human-readable log level. Copied from SimpleSAML_Logger_LoggingHandlerErrorLog.
+            $levelName = sprintf('UNKNOWN%d', $level);
+            if (array_key_exists($level, self::$levelNames)) {
+                $levelName = self::$levelNames[$level];
+            }
+
+            $formats = array('%process', '%level');
+            $replacements = array($this->processname, $levelName);
+
+            $matches = array();
+            if (preg_match('/%date(?:\{([^\}]+)\})?/', $this->format, $matches)) {
+                $format = "%b %d %H:%M:%S";
+                if (isset($matches[1])) {
+                    $format = $matches[1];
+                }
+
+                array_push($formats, $matches[0]);
+                array_push($replacements, strftime($format));
+            }
+
+            $string = str_replace($formats, $replacements, $string);
+            file_put_contents($this->logFile, $string.PHP_EOL, FILE_APPEND);
+        }
+    }
+}