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cache_starred_articles: limit maximum amount of download attempts per-article, consider cache operation a success even if all images were too small (prevents repeated requests)

This commit is contained in:
Andrew Dolgov 2018-11-30 07:20:13 +03:00
parent eaf7cfdba6
commit 758752684c
1 changed files with 29 additions and 3 deletions
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32
plugins/cache_starred_images/init.php
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@ -4,6 +4,7 @@ class Cache_Starred_Images extends Plugin implements IHandler {
/* @var PluginHost $host */
private $host;
private $cache_dir;
private $max_cache_attempts = 5; // per-article
function about() {
return array(1.0,
@ -83,7 +84,7 @@ class Cache_Starred_Images extends Plugin implements IHandler {
* @SuppressWarnings(PHPMD.UnusedLocalVariable)
*/
function hook_house_keeping() {
$files = glob($this->cache_dir . "/*.{png,mp4}", GLOB_BRACE);
$files = glob($this->cache_dir . "/*.{png,mp4,status}", GLOB_BRACE);
$last_article_id = 0;
$article_exists = 1;
@ -167,6 +168,28 @@ class Cache_Starred_Images extends Plugin implements IHandler {
function cache_article_images($content, $site_url, $owner_uid, $article_id) {
libxml_use_internal_errors(true);
$status_filename = $this->cache_dir . $article_id . "-" . sha1($site_url) . ".status";
//_debug("status: $status_filename"); return;
if (file_exists($status_filename))
$status = json_decode(file_get_contents($status_filename), true);
else
$status = [];
$status["attempt"] += 1;
// only allow several download attempts for article
if ($status["attempt"] > $this->max_cache_attempts) {
_debug("too many attempts for $site_url");
return;
}
if (!file_put_contents($status_filename, json_encode($status))) {
user_error("unable to write status file: $status_filename", E_USER_WARNING);
return;
}
$charset_hack = '<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8"/>
</head>';
@ -196,8 +219,11 @@ class Cache_Starred_Images extends Plugin implements IHandler {
if (!file_exists($local_filename)) {
$file_content = fetch_file_contents(["url" => $src, "max_size" => MAX_CACHE_FILE_SIZE]);
if ($file_content && strlen($file_content) > MIN_CACHE_FILE_SIZE) {
file_put_contents($local_filename, $file_content);
if ($file_content) {
if (strlen($file_content) > MIN_CACHE_FILE_SIZE) {
file_put_contents($local_filename, $file_content);
}
$success = true;
}
} else {