mirror of
https://git.lolcat.ca/lolcat/4get.git
synced 2024-12-03 23:42:16 -05:00
224 lines
3.9 KiB
PHP
224 lines
3.9 KiB
PHP
<?php
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new sc_audio();
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class sc_audio{
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public function __construct(){
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include "../data/config.php";
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include "../lib/curlproxy.php";
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$this->proxy = new proxy();
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if(isset($_GET["u"])){
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/*
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we're now proxying audio
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*/
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$viewkey = $_GET["u"];
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if(!isset($_GET["r"])){
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$this->do404("Ranges(r) are missing");
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}
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$ranges = explode(",", $_GET["r"]);
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// sanitize ranges
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foreach($ranges as &$range){
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if(!is_numeric($range)){
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$this->do404("Invalid range specified");
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}
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$range = (int)$range;
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}
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// sort ranges (just to make sure)
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sort($ranges);
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// convert ranges to pairs
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$last = -1;
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foreach($ranges as &$r){
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$tmp = $r;
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$r = [$last + 1, $r];
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$last = $tmp;
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}
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$browser_headers = getallheaders();
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// get the requested range from client
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$client_range = 0;
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foreach($browser_headers as $key => $value){
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if(strtolower($key) == "range"){
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preg_match(
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'/bytes=([0-9]+)/',
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$value,
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$client_regex
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);
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if(isset($client_regex[1])){
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$client_range = (int)$client_regex[1];
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}else{
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$client_range = 0;
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}
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break;
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}
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}
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if(
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$client_range < 0 ||
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$client_range > $ranges[count($ranges) - 1][1]
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){
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// range is not satisfiable
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http_response_code(416);
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header("Content-Type: text/plain");
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die();
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}
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$rng = null;
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for($i=0; $i<count($ranges); $i++){
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if($ranges[$i][0] <= $client_range){
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$rng = $ranges[$i];
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}
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}
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// proxy data!
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http_response_code(206); // partial content
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header("Accept-Ranges: bytes");
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header("Content-Range: bytes {$rng[0]}-{$rng[1]}/" . ($ranges[count($ranges) - 1][1] + 1));
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$viewkey =
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preg_replace(
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'/\/media\/([0-9]+)\/[0-9]+\/[0-9]+/',
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'/media/$1/' . $rng[0] . '/' . $rng[1],
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$viewkey
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);
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try{
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$this->proxy->stream_linear_audio(
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$viewkey
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);
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}catch(Exception $error){
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$this->do404("Could not read stream");
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}
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die();
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}
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/*
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redirect user to correct resource
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we need to scrape and store the byte positions in the result URL
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*/
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if(!isset($_GET["s"])){
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$this->do404("The URL(s) parameter is missing");
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}
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$viewkey = $_GET["s"];
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if(
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preg_match(
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'/soundcloud\.com$/',
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parse_url($viewkey, PHP_URL_HOST)
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) === false
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){
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$this->do404("This endpoint can only be used for soundcloud streams");
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}
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try{
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$json = $this->proxy->get($viewkey)["body"];
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}catch(Exception $error){
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$this->do404("Curl error: " . $error->getMessage());
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}
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$json = json_decode($json, true);
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if(!isset($json["url"])){
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$this->do404("Could not get URL from JSON");
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}
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$viewkey = $json["url"];
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$m3u8 = $this->proxy->get($viewkey)["body"];
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$m3u8 = explode("\n", $m3u8);
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$lineout = null;
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$streampos_arr = [];
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foreach($m3u8 as $line){
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$line = trim($line);
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if($line[0] == "#"){
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continue;
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}
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if($lineout === null){
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$lineout = $line;
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}
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preg_match(
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'/\/media\/[0-9]+\/([0-9]+)\/([0-9]+)/',
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$line,
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$matches
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);
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if(isset($matches[0])){
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$streampos_arr[] = [
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(int)$matches[1],
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(int)$matches[2]
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];
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}
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}
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if($lineout === null){
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$this->do404("Could not get stream URL");
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}
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$lineout =
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preg_replace(
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'/\/media\/([0-9]+)\/[0-9]+\/[0-9]+/',
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'/media/$1/0/0',
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$lineout
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);
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$streampos = [];
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foreach($streampos_arr as $pos){
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$streampos[] = $pos[1];
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}
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$streampos = implode(",", $streampos);
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header("Location: /audio/sc?u=" . urlencode($lineout) . "&r=$streampos");
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header("Accept-Ranges: bytes");
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}
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private function do404($error){
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http_response_code(404);
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header("Content-Type: text/plain");
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header("X-Error: $error");
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die();
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}
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}
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