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-rw-r--r--classes/File.php33
-rw-r--r--classes/File_oembed.php6
-rw-r--r--classes/File_redirection.php111
3 files changed, 123 insertions, 27 deletions
diff --git a/classes/File.php b/classes/File.php
index 4ecd3b959..8c788c007 100644
--- a/classes/File.php
+++ b/classes/File.php
@@ -67,7 +67,14 @@ class File extends Memcached_DataObject
return $att;
}
- function saveNew($redir_data, $given_url) {
+ /**
+ * Save a new file record.
+ *
+ * @param array $redir_data lookup data eg from File_redirection::where()
+ * @param string $given_url
+ * @return File
+ */
+ function saveNew(array $redir_data, $given_url) {
$x = new File;
$x->url = $given_url;
if (!empty($redir_data['protected'])) $x->protected = $redir_data['protected'];
@@ -77,19 +84,36 @@ class File extends Memcached_DataObject
if (isset($redir_data['time']) && $redir_data['time'] > 0) $x->date = intval($redir_data['time']);
$file_id = $x->insert();
+ $x->saveOembed($redir_data, $given_url);
+ return $x;
+ }
+
+ /**
+ * Save embedding information for this file, if applicable.
+ *
+ * Normally this won't need to be called manually, as File::saveNew()
+ * takes care of it.
+ *
+ * @param array $redir_data lookup data eg from File_redirection::where()
+ * @param string $given_url
+ * @return boolean success
+ */
+ public function saveOembed($redir_data, $given_url)
+ {
if (isset($redir_data['type'])
&& (('text/html' === substr($redir_data['type'], 0, 9) || 'application/xhtml+xml' === substr($redir_data['type'], 0, 21)))
&& ($oembed_data = File_oembed::_getOembed($given_url))) {
- $fo = File_oembed::staticGet('file_id', $file_id);
+ $fo = File_oembed::staticGet('file_id', $this->id);
if (empty($fo)) {
- File_oembed::saveNew($oembed_data, $file_id);
+ File_oembed::saveNew($oembed_data, $this->id);
+ return true;
} else {
common_log(LOG_WARNING, "Strangely, a File_oembed object exists for new file $file_id", __FILE__);
}
}
- return $x;
+ return false;
}
function processNew($given_url, $notice_id=null) {
@@ -105,6 +129,7 @@ class File extends Memcached_DataObject
$redir_url = $redir_data['url'];
} elseif (is_string($redir_data)) {
$redir_url = $redir_data;
+ $redir_data = array();
} else {
throw new ServerException("Can't process url '$given_url'");
}
diff --git a/classes/File_oembed.php b/classes/File_oembed.php
index 11f160718..041b44740 100644
--- a/classes/File_oembed.php
+++ b/classes/File_oembed.php
@@ -81,6 +81,12 @@ class File_oembed extends Memcached_DataObject
}
}
+ /**
+ * Save embedding info for a new file.
+ *
+ * @param object $data Services_oEmbed_Object_*
+ * @param int $file_id
+ */
function saveNew($data, $file_id) {
$file_oembed = new File_oembed;
$file_oembed->file_id = $file_id;
diff --git a/classes/File_redirection.php b/classes/File_redirection.php
index 08a6e8d8b..f128b3e07 100644
--- a/classes/File_redirection.php
+++ b/classes/File_redirection.php
@@ -58,24 +58,30 @@ class File_redirection extends Memcached_DataObject
return $request;
}
- function _redirectWhere_imp($short_url, $redirs = 10, $protected = false) {
+ /**
+ * Check if this URL is a redirect and return redir info.
+ *
+ * Most code should call File_redirection::where instead, to check if we
+ * already know that redirection and avoid extra hits to the web.
+ *
+ * The URL is hit and any redirects are followed, up to 10 levels or until
+ * a protected URL is reached.
+ *
+ * @param string $in_url
+ * @return mixed one of:
+ * string - target URL, if this is a direct link or can't be followed
+ * array - redirect info if this is an *unknown* redirect:
+ * associative array with the following elements:
+ * code: HTTP status code
+ * redirects: count of redirects followed
+ * url: URL string of final target
+ * type (optional): MIME type from Content-Type header
+ * size (optional): byte size from Content-Length header
+ * time (optional): timestamp from Last-Modified header
+ */
+ public function lookupWhere($short_url, $redirs = 10, $protected = false) {
if ($redirs < 0) return false;
- // let's see if we know this...
- $a = File::staticGet('url', $short_url);
-
- if (!empty($a)) {
- // this is a direct link to $a->url
- return $a->url;
- } else {
- $b = File_redirection::staticGet('url', $short_url);
- if (!empty($b)) {
- // this is a redirect to $b->file_id
- $a = File::staticGet('id', $b->file_id);
- return $a->url;
- }
- }
-
if(strpos($short_url,'://') === false){
return $short_url;
}
@@ -93,12 +99,13 @@ class File_redirection extends Memcached_DataObject
}
} catch (Exception $e) {
// Invalid URL or failure to reach server
+ common_log(LOG_ERR, "Error while following redirects for $short_url: " . $e->getMessage());
return $short_url;
}
if ($response->getRedirectCount() && File::isProtected($response->getUrl())) {
// Bump back up the redirect chain until we find a non-protected URL
- return self::_redirectWhere_imp($short_url, $response->getRedirectCount() - 1, true);
+ return self::lookupWhere($short_url, $response->getRedirectCount() - 1, true);
}
$ret = array('code' => $response->getStatus()
@@ -115,11 +122,60 @@ class File_redirection extends Memcached_DataObject
return $ret;
}
- function where($in_url) {
- $ret = File_redirection::_redirectWhere_imp($in_url);
+ /**
+ * Check if this URL is a redirect and return redir info.
+ * If a File record is present for this URL, it is not considered a redirect.
+ * If a File_redirection record is present for this URL, the recorded target is returned.
+ *
+ * If no File or File_redirect record is present, the URL is hit and any
+ * redirects are followed, up to 10 levels or until a protected URL is
+ * reached.
+ *
+ * @param string $in_url
+ * @return mixed one of:
+ * string - target URL, if this is a direct link or a known redirect
+ * array - redirect info if this is an *unknown* redirect:
+ * associative array with the following elements:
+ * code: HTTP status code
+ * redirects: count of redirects followed
+ * url: URL string of final target
+ * type (optional): MIME type from Content-Type header
+ * size (optional): byte size from Content-Length header
+ * time (optional): timestamp from Last-Modified header
+ */
+ public function where($in_url) {
+ // let's see if we know this...
+ $a = File::staticGet('url', $in_url);
+
+ if (!empty($a)) {
+ // this is a direct link to $a->url
+ return $a->url;
+ } else {
+ $b = File_redirection::staticGet('url', $in_url);
+ if (!empty($b)) {
+ // this is a redirect to $b->file_id
+ $a = File::staticGet('id', $b->file_id);
+ return $a->url;
+ }
+ }
+
+ $ret = File_redirection::lookupWhere($in_url);
return $ret;
}
+ /**
+ * Shorten a URL with the current user's configured shortening
+ * options, if applicable.
+ *
+ * If it cannot be shortened or the "short" URL is longer than the
+ * original, the original is returned.
+ *
+ * If the referenced item has not been seen before, embedding data
+ * may be saved.
+ *
+ * @param string $long_url
+ * @return string
+ */
function makeShort($long_url) {
$canon = File_redirection::_canonUrl($long_url);
@@ -141,11 +197,20 @@ class File_redirection extends Memcached_DataObject
// store it
$file = File::staticGet('url', $long_url);
if (empty($file)) {
+ // Check if the target URL is itself a redirect...
$redir_data = File_redirection::where($long_url);
- $file = File::saveNew($redir_data, $long_url);
- $file_id = $file->id;
- if (!empty($redir_data['oembed']['json'])) {
- File_oembed::saveNew($redir_data['oembed']['json'], $file_id);
+ if (is_array($redir_data)) {
+ // We haven't seen the target URL before.
+ // Save file and embedding data about it!
+ $file = File::saveNew($redir_data, $long_url);
+ $file_id = $file->id;
+ if (!empty($redir_data['oembed']['json'])) {
+ File_oembed::saveNew($redir_data['oembed']['json'], $file_id);
+ }
+ } else if (is_string($redir_data)) {
+ // The file is a known redirect target.
+ $file = File::staticGet('url', $redir_data);
+ $file_id = $file->id;
}
} else {
$file_id = $file->id;