diff options
Diffstat (limited to 'audio_sc.php')
| -rw-r--r-- | audio_sc.php | 223 |
1 files changed, 223 insertions, 0 deletions
diff --git a/audio_sc.php b/audio_sc.php new file mode 100644 index 0000000..9a227e3 --- /dev/null +++ b/audio_sc.php @@ -0,0 +1,223 @@ +<?php + +new sc_audio(); + +class sc_audio{ + + public function __construct(){ + + include "lib/curlproxy.php"; + $this->proxy = new proxy(); + + if(isset($_GET["u"])){ + + /* + we're now proxying audio + */ + $viewkey = $_GET["u"]; + + if(!isset($_GET["r"])){ + + $this->do404("Ranges(r) are missing"); + } + + $ranges = explode(",", $_GET["r"]); + + // sanitize ranges + foreach($ranges as &$range){ + + if(!is_numeric($range)){ + + $this->do404("Invalid range specified"); + } + + $range = (int)$range; + } + + // sort ranges (just to make sure) + sort($ranges); + + // convert ranges to pairs + $last = -1; + foreach($ranges as &$r){ + + $tmp = $r; + $r = [$last + 1, $r]; + + $last = $tmp; + } + + $browser_headers = getallheaders(); + + // get the requested range from client + $client_range = 0; + foreach($browser_headers as $key => $value){ + + if(strtolower($key) == "range"){ + + preg_match( + '/bytes=([0-9]+)/', + $value, + $client_regex + ); + + if(isset($client_regex[1])){ + + $client_range = (int)$client_regex[1]; + }else{ + + $client_range = 0; + } + break; + } + } + + if( + $client_range < 0 || + $client_range > $ranges[count($ranges) - 1][1] + ){ + + // range is not satisfiable + http_response_code(416); + header("Content-Type: text/plain"); + die(); + } + + $rng = null; + for($i=0; $i<count($ranges); $i++){ + + if($ranges[$i][0] <= $client_range){ + + $rng = $ranges[$i]; + } + } + + // proxy data! + http_response_code(206); // partial content + header("Accept-Ranges: bytes"); + header("Content-Range: bytes {$rng[0]}-{$rng[1]}/" . ($ranges[count($ranges) - 1][1] + 1)); + + $viewkey = + preg_replace( + '/\/media\/([0-9]+)\/[0-9]+\/[0-9]+/', + '/media/$1/' . $rng[0] . '/' . $rng[1], + $viewkey + ); + + try{ + + $this->proxy->stream_linear_audio( + $viewkey + ); + }catch(Exception $error){ + + $this->do404("Could not read stream"); + } + + die(); + } + + /* + redirect user to correct resource + we need to scrape and store the byte positions in the result URL + */ + if(!isset($_GET["s"])){ + + $this->do404("The URL(s) parameter is missing"); + } + + $viewkey = $_GET["s"]; + + if( + preg_match( + '/soundcloud\.com$/', + parse_url($viewkey, PHP_URL_HOST) + ) === false + ){ + + $this->do404("This endpoint can only be used for soundcloud streams"); + } + + try{ + + $json = $this->proxy->get($viewkey)["body"]; + }catch(Exception $error){ + + $this->do404("Curl error: " . $error->getMessage()); + } + + $json = json_decode($json, true); + + if(!isset($json["url"])){ + + $this->do404("Could not get URL from JSON"); + } + + $viewkey = $json["url"]; + + $m3u8 = $this->proxy->get($viewkey)["body"]; + + $m3u8 = explode("\n", $m3u8); + + $lineout = null; + $streampos_arr = []; + foreach($m3u8 as $line){ + + $line = trim($line); + if($line[0] == "#"){ + + continue; + } + + if($lineout === null){ + $lineout = $line; + } + + preg_match( + '/\/media\/[0-9]+\/([0-9]+)\/([0-9]+)/', + $line, + $matches + ); + + if(isset($matches[0])){ + + $streampos_arr[] = [ + (int)$matches[1], + (int)$matches[2] + ]; + } + } + + if($lineout === null){ + + $this->do404("Could not get stream URL"); + } + + $lineout = + preg_replace( + '/\/media\/([0-9]+)\/[0-9]+\/[0-9]+/', + '/media/$1/0/0', + $lineout + ); + + $streampos = []; + + foreach($streampos_arr as $pos){ + + $streampos[] = $pos[1]; + } + + $streampos = implode(",", $streampos); + + header("Location: audio_sc?u=" . urlencode($lineout) . "&r=$streampos"); + header("Accept-Ranges: bytes"); + } + + private function do404($error){ + + http_response_code(404); + header("Content-Type: text/plain"); + header("X-Error: $error"); + die(); + } +} |