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Issue #22 - Auto-detect mime types.

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This commit is contained in:
Daniel Thee Roperto
2016-11-10 15:03:07 +11:00
parent 24759fe280
commit 4232ce1b6e
3 changed files with 70 additions and 19 deletions
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56
classes/local/controllers/maintenance_static_page.php
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@@ -28,6 +28,7 @@ namespace auth_outage\local\controllers;
use auth_outage\local\outage;
use coding_exception;
use DOMDocument;
use finfo;
use invalid_parameter_exception;
use invalid_state_exception;
use moodle_url;
@@ -61,7 +62,8 @@ class maintenance_static_page {
} else if (PHPUNIT_TEST) {
$html = '<html></html>';
} else {
$html = self::file_get_contents($CFG->wwwroot.'/auth/outage/info.php?auth_outage_hide_warning=1&id='.$outage->id);
$data = self::file_get_data($CFG->wwwroot.'/auth/outage/info.php?auth_outage_hide_warning=1&id='.$outage->id);
$html = $data['contents'];
}
return self::create_from_html($html);
@@ -97,13 +99,33 @@ class maintenance_static_page {
* @param string $file File to get.
* @return string Contents of $file or an empty string if failed.
*/
private static function file_get_contents($file) {
$contents = @file_get_contents($file);
private static function file_get_data($file) {
if (self::is_url($file)) {
$curl = curl_init();
curl_setopt($curl, CURLOPT_URL, $file);
curl_setopt($curl, CURLOPT_RETURNTRANSFER, true);
$contents = curl_exec($curl);
$mime = curl_getinfo($curl, CURLINFO_CONTENT_TYPE);
curl_close($curl);
} else {
$contents = @file_get_contents($file);
$mime = (new finfo(FILEINFO_MIME_TYPE))->buffer($contents); // Not perfect, but try guessing it.
}
if ($contents === false) {
debugging('Cannot fetch: '.$file);
return ''; // Better a broken link than halting the generation.
$contents = '';
$mime = 'unknown';
}
return $contents;
return ['contents' => $contents, 'mime' => $mime];
}
/**
* Checks if the given string starts with "http://" or "https://".
* @param $url
* @return bool
*/
private static function is_url($url) {
return (bool)preg_match('#^http(s)?://#', $url);
}
/** @var DOMDocument */
@@ -269,7 +291,7 @@ class maintenance_static_page {
if (($rel != 'stylesheet') || ($href == '')) {
continue;
}
$filename = $this->save_url_file($href, 'css');
$filename = $this->save_url_file($href);
if (is_null($filename)) {
$url = $href; // Skipped, use original URL.
} else {
@@ -299,7 +321,7 @@ class maintenance_static_page {
if (($rel != 'shortcut icon') || ($href == '')) {
continue;
}
$link->setAttribute('href', $this->generate_file_url($href, 'png')); // Works for most image formats.
$link->setAttribute('href', $this->generate_file_url($href)); // Works for most image formats.
}
}
@@ -314,18 +336,17 @@ class maintenance_static_page {
if ($src == '') {
continue;
}
$link->setAttribute('src', $this->generate_file_url($src, 'png')); // Works for most image formats.
$link->setAttribute('src', $this->generate_file_url($src)); // Works for most image formats.
}
}
/**
* Saves the content of the URL into a file, returning the new URL.
* @param string $url Input URL.
* @param string $type Type of file.
* @return string Output URL.
*/
private function generate_file_url($url, $type) {
$filename = $this->save_url_file($url, $type);
private function generate_file_url($url) {
$filename = $this->save_url_file($url);
if (is_null($filename)) {
return $url; // Skipped, use original URL.
}
@@ -344,13 +365,12 @@ class maintenance_static_page {
/**
* Saves the content of the URL into a file, returning the local filename.
* @param string $url Input URL.
* @param string $type Type of file.
* @return string|null Output filename or null if skipped.
*/
private function save_url_file($url, $type) {
private function save_url_file($url) {
global $CFG;
if (!preg_match('#^http(s)?://#', $url)) {
if (!self::is_url($url)) {
debugging('Found a relative url ('.$url.') -- is it using moodle_url()?');
return null; // Leave hardcoded URLs as it is.
}
@@ -364,10 +384,12 @@ class maintenance_static_page {
$url = str_replace($CFG->wwwroot, $CFG->dirroot, $url);
}
$contents = self::file_get_contents($url);
$filename = sha1($contents).'.'.$type;
$data = self::file_get_data($url);
$mime = trim(base64_encode($data['mime']), '=');
$filename = sha1($data['contents']).'.'.$mime;
$filepath = $this->get_resources_folder().'/'.$filename;
file_put_contents($filepath, $contents);
file_put_contents($filepath, $data['contents']);
if ($this->preview) {
$filename = 'preview/'.$filename;