defaulticon();
}
$filename = str_replace(["https://", "http://"], "", $url);
header("Content-Disposition: inline; filename=\"{$filename}.png\"");
include "lib/curlproxy.php";
$this->proxy = new proxy(false);
$this->filename = parse_url($url, PHP_URL_HOST);
/*
Check if we have the favicon stored locally
*/
if(file_exists("icons/" . $filename . ".png")){
$handle = fopen("icons/" . $filename . ".png", "r");
echo fread($handle, filesize("icons/" . $filename . ".png"));
fclose($handle);
return;
}
/*
Scrape html
*/
try{
$payload = $this->proxy->get($url, $this->proxy::req_web, true);
}catch(Exception $error){
header("X-Error: Could not fetch HTML (" . $error->getMessage() . ")");
$this->favicon404();
}
//$payload["body"] = '';
// get link tags
preg_match_all(
'/< *link +(.*)[\/]?>/Uixs',
$payload["body"],
$linktags
);
/*
Get relevant tags
*/
$linktags = $linktags[1];
$attributes = [];
/*
header("Content-Type: text/plain");
print_r($linktags);
print_r($payload);
die();*/
for($i=0; $i $tags[1][$k],
"value" => trim($tags[2][$k], "\" \n\r\t\v\x00")
];
}
}
unset($payload);
unset($linktags);
$href = [];
// filter out the tags we want
foreach($attributes as &$group){
$tmp_href = null;
$tmp_rel = null;
$badtype = false;
foreach($group as &$attribute){
switch($attribute["name"]){
case "rel":
$attribute["value"] = strtolower($attribute["value"]);
if(
(
$attribute["value"] == "icon" ||
$attribute["value"] == "manifest" ||
$attribute["value"] == "shortcut icon" ||
$attribute["value"] == "apple-touch-icon" ||
$attribute["value"] == "mask-icon"
) === false
){
break;
}
$tmp_rel = $attribute["value"];
break;
case "type":
$attribute["value"] = explode("/", $attribute["value"], 2);
if(strtolower($attribute["value"][0]) != "image"){
$badtype = true;
break;
}
break;
case "href":
// must not contain invalid characters
// must be bigger than 1
if(
filter_var($attribute["value"], FILTER_SANITIZE_URL) == $attribute["value"] &&
strlen($attribute["value"]) > 0
){
$tmp_href = $attribute["value"];
break;
}
break;
}
}
if(
$badtype === false &&
$tmp_rel !== null &&
$tmp_href !== null
){
$href[$tmp_rel] = $tmp_href;
}
}
/*
Priority list
*/
/*
header("Content-Type: text/plain");
print_r($href);
die();*/
if(isset($href["icon"])){ $href = $href["icon"]; }
elseif(isset($href["apple-touch-icon"])){ $href = $href["apple-touch-icon"]; }
elseif(isset($href["manifest"])){
// attempt to parse manifest, but fallback to []
$href = $this->parsemanifest($href["manifest"], $url);
}
if(is_array($href)){
if(isset($href["mask-icon"])){ $href = $href["mask-icon"]; }
elseif(isset($href["shortcut icon"])){ $href = $href["shortcut icon"]; }
else{
$href = "/favicon.ico";
}
}
$href = $this->proxy->getabsoluteurl($href, $url);
/*
header("Content-type: text/plain");
echo $href;
die();*/
/*
Download the favicon
*/
//$href = "https://git.lolcat.ca/assets/img/logo.svg";
try{
$payload =
$this->proxy->get(
$href,
$this->proxy::req_image,
true,
$url
);
}catch(Exception $error){
header("X-Error: Could not fetch the favicon (" . $error->getMessage() . ")");
$this->favicon404();
}
/*
Parse the file format
*/
$image = null;
$format = $this->proxy->getimageformat($payload, $image);
/*
Convert the image
*/
try{
/*
@todo: fix issues with avif+transparency
maybe using GD as fallback?
*/
if($format !== false){
$image->setFormat($format);
}
$image->setBackgroundColor(new ImagickPixel("transparent"));
$image->readImageBlob($payload["body"]);
$image->resizeImage(16, 16, imagick::FILTER_LANCZOS, 1);
$image->setFormat("png");
$image = $image->getImageBlob();
// save favicon
$handle = fopen("icons/" . $this->filename . ".png", "w");
fwrite($handle, $image, strlen($image));
fclose($handle);
echo $image;
}catch(ImagickException $error){
header("X-Error: Could not convert the favicon: (" . $error->getMessage() . ")");
$this->favicon404();
}
return;
}
private function parsemanifest($href, $url){
if(
// check if base64-encoded JSON manifest
preg_match(
'/^data:application\/json;base64,([A-Za-z0-9=]*)$/',
$href,
$json
)
){
$json = base64_decode($json[1]);
if($json === false){
// could not decode the manifest regex
return [];
}
}else{
try{
$json =
$this->proxy->get(
$this->proxy->getabsoluteurl($href, $url),
$this->proxy::req_web,
false,
$url
);
$json = $json["body"];
}catch(Exception $error){
// could not fetch the manifest
return [];
}
}
$json = json_decode($json, true);
if($json === null){
// manifest did not return valid json
return [];
}
if(
isset($json["start_url"]) &&
$this->proxy->validateurl($json["start_url"])
){
$url = $json["start_url"];
}
if(!isset($json["icons"][0]["src"])){
// manifest does not contain a path to the favicon
return [];
}
// horay, return the favicon path
return $json["icons"][0]["src"];
}
private function favicon404(){
// fallback to google favicons
// ... probably blocked by cuckflare
try{
$image =
$this->proxy->get(
"https://t0.gstatic.com/faviconV2?client=SOCIAL&type=FAVICON&fallback_opts=TYPE,SIZE,URL&url=http://{$this->filename}&size=16",
$this->proxy::req_image
);
}catch(Exception $error){
$this->defaulticon();
}
// write favicon from google
$handle = fopen("icons/" . $this->filename . ".png", "w");
fwrite($handle, $image["body"], strlen($image["body"]));
fclose($handle);
echo $image["body"];
die();
}
private function defaulticon(){
// give 404 and fuck off
http_response_code(404);
$handle = fopen("lib/favicon404.png", "r");
echo fread($handle, filesize("lib/favicon404.png"));
fclose($handle);
die();
}
}