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MDL-42016 repository: Implement new sync method in repositories

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This commit is contained in:
Marina Glancy 2013-10-04 23:26:03 +10:00
parent 873555604f
commit 5e5923ea28
4 changed files with 92 additions and 122 deletions
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52
repository/equella/lib.php
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@ -134,7 +134,7 @@ class repository_equella extends repository {
* If we received the connection timeout more than 3 times in a row, we don't attemt to
* connect to the server any more during this request.
*
* This function is used by {@link repository_equella::get_file_by_reference()} that
* This function is used by {@link repository_equella::sync_reference()} that
* synchronises the file size of referenced files.
*
* @param int $errno omit if we just want to know the return value, the last curl_errno otherwise
@ -159,18 +159,6 @@ class repository_equella extends repository {
return ($countfailures[$sess] < 3);
}
/**
* Decide whether or not the file should be synced
*
* @param stored_file $storedfile
* @return bool
*/
public function sync_individual_file(stored_file $storedfile) {
// if we had several unsuccessfull attempts to connect to server - do not try any more
return $this->connection_result();
}
/**
* Download a file, this function can be overridden by subclass. {@link curl}
*
@ -202,34 +190,30 @@ class repository_equella extends repository {
return array('path'=>$path, 'url'=>$url);
}
/**
* Returns information about file in this repository by reference
*
* If the file is an image we download the contents and save it in our filesystem
* so we can generate thumbnails. Otherwise we just request the file size.
* Returns null if file not found or can not be accessed
*
* @param stdClass $reference file reference db record
* @return stdClass|null contains one of the following:
* - 'filesize' (for non-image files or files we failed to retrieve fully because of timeout)
* - 'filepath' (for image files that we retrieived and saved)
*/
public function get_file_by_reference($reference) {
public function sync_reference(stored_file $file) {
global $USER;
$ref = @unserialize(base64_decode($reference->reference));
if ($file->get_referencelastsync() + DAYSECS > time() || !$this->connection_result()) {
// Synchronise not more often than once a day.
// if we had several unsuccessfull attempts to connect to server - do not try any more.
return false;
}
$ref = @unserialize(base64_decode($file->get_reference()));
if (!isset($ref->url) || !($url = $this->appendtoken($ref->url))) {
// Occurs when the user isn't known..
return null;
$file->set_missingsource();
return true;
}
$return = null;
$cookiepathname = $this->prepare_file($USER->id. '_'. uniqid('', true). '.cookie');
$c = new curl(array('cookie' => $cookiepathname));
if (file_extension_in_typegroup($ref->filename, 'web_image')) {
$path = $this->prepare_file('');
$result = $c->download_one($url, null, array('filepath' => $path, 'followlocation' => true, 'timeout' => self::SYNCIMAGE_TIMEOUT));
if ($result === true) {
$return = (object)array('filepath' => $path);
$fs = get_file_storage();
list($contenthash, $filesize, $newfile) = $fs->add_file_to_pool($path);
$file->set_synchronized($contenthash, $filesize);
return true;
}
} else {
$result = $c->head($url, array('followlocation' => true, 'timeout' => self::SYNCFILE_TIMEOUT));
@ -241,13 +225,15 @@ class repository_equella extends repository {
$this->connection_result($c->get_errno());
$curlinfo = $c->get_info();
if ($return === null && isset($curlinfo['http_code']) && $curlinfo['http_code'] == 200
if (isset($curlinfo['http_code']) && $curlinfo['http_code'] == 200
&& array_key_exists('download_content_length', $curlinfo)
&& $curlinfo['download_content_length'] >= 0) {
// we received a correct header and at least can tell the file size
$return = (object)array('filesize' => $curlinfo['download_content_length']);
$file->set_synchronized(null, $curlinfo['download_content_length']);
return true;
}
return $return;
$file->set_missingsource();
return true;
}
/**