adding support for alias #47

CImage.php

@@ -2134,6 +2134,37 @@ class CImage
 
 
 
+    /**
+     * Create a hard link, as an alias, to the cached file.
+     *
+     * @param string $alias where to store the link.
+     *
+     * @return $this
+     */
+    public function linkToCacheFile($alias)
+    {
+        if ($alias === null) {
+            $this->log("Ignore creating alias.");
+            return $this;
+        }
+
+        if (is_readable($alias)) {
+            unlink($alias);
+        }
+
+        $res = link($this->cacheFileName, $alias);
+
+        if ($res) {
+            $this->log("Created an alias to the cachefile: $alias");
+        } else {
+            $this->log("Failed to create the alias: $alias");
+        }
+
+        return $this;
+    }
+
+
+
     /**
      * Output image to browser using caching.
      *

README.md

@@ -280,6 +280,8 @@ Revision history
 
 v0.6.x (latest)
 
+* Support for option `password, pwd` to protect usage of `alias` and remote download.
+* Added support for option `alias` that creates a link to a cached version  of the image #47.
 * Create cache directory for remote download if it does not exists.
 * Cleaned up `img_config.php` and introduced default values for almost all options #72.
 
@@ -287,6 +289,7 @@ v0.6.x (latest)
 v0.6.2 (2015-01-14)
 
 * Added support for download of remote images #43.
+* Added autoloader.
 
 
 v0.6.1 (2015-01-08)

webroot/img.php

@@ -166,24 +166,27 @@ $img->setVerbose($verbose);
 
 
 /**
- * Allow or disallow remote download of images from other servers.
- *
+ * Check if passwords are configured, used and match.
+ * Options decide themself if they require passwords to be used.
  */
-$allowRemote = getConfig('remote_allow', false);
-$remotePwd   = getConfig('remote_password', false);
+$pwdConfig   = getConfig('password', false);
 $pwd         = get(array('password', 'pwd'), null);
 
 // Check if passwords match, if configured to use passwords
 $passwordMatch = null;
-if ($remotePwd != false) {
-    if ($remotePwd == $pwd) {
-        $passwordMatch = true;
-    } else {
-        $passwordMatch = false;
-        errorPage('Trying to download remote image but missing password.');
-    }
+if ($pwdConfig) {
+    $passwordMatch = ($pwdConfig == $pwd);
 }
 
+
+
+/**
+ * Allow or disallow remote download of images from other servers.
+ * Passwords apply if used.
+ *
+ */
+$allowRemote = getConfig('remote_allow', false);
+
 if ($allowRemote && $passwordMatch !== false) {
     $pattern = getConfig('remote_pattern', null);
     $img->setRemoteDownload($allowRemote, $pattern);
@@ -625,6 +628,33 @@ $postProcessing = getConfig('postprocessing', array(
 
 
 
+/**
+ * alias - Save resulting image to another alias name.
+ * Password apply if defined.
+ */
+$alias     = get('alias', null);
+$aliasPath = getConfig('alias_path', null);
+$aliasTarget = null;
+
+if ($alias && $aliasPath) {
+
+    $aliasTarget = $aliasPath . $alias;
+    $useCache    = false;
+
+    ($passwordMatch !== false)
+        or errorPage("Alias used and password check failed.");
+    is_writable($aliasPath)
+        or errorPage("Directory for alias is not writable.");
+    preg_match($validFilename, $alias)
+        or errorPage('Filename for alias contains invalid characters.');
+} else if ($alias) {
+    errorPage('Alias is not enabled in the config file.');
+}
+
+verbose("alias = $alias");
+
+
+
 /**
  * Display image if verbose mode
  */
@@ -716,4 +746,5 @@ $img->log("Incoming arguments: " . print_r(verbose(), 1))
     ->postResize()
     ->setPostProcessingOptions($postProcessing)
     ->save()
+    ->linkToCacheFile($aliasTarget)
     ->output();

webroot/img_config.php

@@ -17,9 +17,42 @@ return array(
 
     /**
      * Paths, where are the images stored and where is the cache.
+     * End all paths with a slash.
+     *
+     * Default values:
+     *  image_path: No default value
+     *  cache_path: No default value
+     *  alias_path: null
      */
     'image_path'   =>  __DIR__ . '/img/',
     'cache_path'   =>  __DIR__ . '/../cache/',
+    //'alias_path'   =>  __DIR__ . '/img/alias/',
+
+
+
+    /**
+    * Use password to protect from missusage, send &pwd=... or &password=..
+    * with the request to match the password or set to false to disable.
+    * Passwords are only used together with the options for remote download
+    * and aliasing.
+    *
+    * Default values.
+    *  password: false // as in do not use password
+    */
+    //'password' => false, // "secret-password",
+
+
+
+    /**
+     * Allow or disallow downloading of remote files, images available on
+     * some remote server. Default is to disallow.
+     *
+     * Default values.
+     *  remote_allow:    false
+     *  remote_pattern:  null  // use default values from CImage
+     */
+    //'remote_allow'    => true,
+    //'remote_pattern'  => '#^https?://#',
 
 
 
@@ -45,23 +78,6 @@ return array(
 
 
 
-    /**
-     * Allow or disallow downloading of remote files, images available on
-     * some remote server. Default is to disallow.
-     * Use password to protect from missusage, send &pwd=... or &password=..
-     * with the request to match the password or set to false to disable.
-     *
-     * Default values.
-     *  remote_allow:    false
-     *  remote_password: false // as in do not use password
-     *  remote_pattern:  null  // use default values from CImage
-     */
-    'remote_allow'    => true,
-    //'remote_password' => false, // "secret-password",
-    //'remote_pattern'  => '#^https?://#',
-
-
-
     /**
      * Set default timezone.
      *