Add upstream

wp-content/plugins/updraftplus/includes/Google/Logger/File.php

@@ -0,0 +1,158 @@
+<?php
+/*
+ * Copyright 2014 Google Inc.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+if (!class_exists('Google_Client')) {
+  require_once dirname(__FILE__) . '/../autoload.php';
+}
+
+/**
+ * File logging class based on the PSR-3 standard.
+ *
+ * This logger writes to a PHP stream resource.
+ */
+class Google_Logger_File extends Google_Logger_Abstract
+{
+  /**
+   * @var string|resource $file Where logs are written
+   */
+  private $file;
+  /**
+   * @var integer $mode The mode to use if the log file needs to be created
+   */
+  private $mode = 0640;
+  /**
+   * @var boolean $lock If a lock should be attempted before writing to the log
+   */
+  private $lock = false;
+
+  /**
+   * @var integer $trappedErrorNumber Trapped error number
+   */
+  private $trappedErrorNumber;
+  /**
+   * @var string $trappedErrorString Trapped error string
+   */
+  private $trappedErrorString;
+
+  /**
+   * {@inheritdoc}
+   */
+  public function __construct(Google_Client $client)
+  {
+    parent::__construct($client);
+
+    $file = $client->getClassConfig('Google_Logger_File', 'file');
+    if (!is_string($file) && !is_resource($file)) {
+      throw new Google_Logger_Exception(
+          'File logger requires a filename or a valid file pointer'
+      );
+    }
+
+    $mode = $client->getClassConfig('Google_Logger_File', 'mode');
+    if (!$mode) {
+      $this->mode = $mode;
+    }
+
+    $this->lock = (bool) $client->getClassConfig('Google_Logger_File', 'lock');
+    $this->file = $file;
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  protected function write($message)
+  {
+    if (is_string($this->file)) {
+      $this->open();
+    } elseif (!is_resource($this->file)) {
+      throw new Google_Logger_Exception('File pointer is no longer available');
+    }
+
+    if ($this->lock) {
+      flock($this->file, LOCK_EX);
+    }
+
+    fwrite($this->file, (string) $message);
+
+    if ($this->lock) {
+      flock($this->file, LOCK_UN);
+    }
+  }
+
+  /**
+   * Opens the log for writing.
+   *
+   * @return resource
+   */
+  private function open()
+  {
+    // Used for trapping `fopen()` errors.
+    $this->trappedErrorNumber = null;
+    $this->trappedErrorString = null;
+
+    $old = set_error_handler(array($this, 'trapError'));
+
+    $needsChmod = !file_exists($this->file);
+    $fh = fopen($this->file, 'a');
+
+    restore_error_handler();
+
+    // Handles trapped `fopen()` errors.
+    if ($this->trappedErrorNumber) {
+      throw new Google_Logger_Exception(
+          sprintf(
+              "Logger Error: '%s'",
+              $this->trappedErrorString
+          ),
+          $this->trappedErrorNumber
+      );
+    }
+
+    if ($needsChmod) {
+      @chmod($this->file, $this->mode & ~umask());
+    }
+
+    return $this->file = $fh;
+  }
+
+  /**
+   * Closes the log stream resource.
+   */
+  private function close()
+  {
+    if (is_resource($this->file)) {
+      fclose($this->file);
+    }
+  }
+
+  /**
+   * Traps `fopen()` errors.
+   *
+   * @param integer $errno The error number
+   * @param string $errstr The error string
+   */
+  private function trapError($errno, $errstr)
+  {
+    $this->trappedErrorNumber = $errno;
+    $this->trappedErrorString = $errstr;
+  }
+
+  public function __destruct()
+  {
+    $this->close();
+  }
+}