TrackManiaControl/application/core/Files/AsynchronousFileReader.php

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<?php
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namespace ManiaControl\Files;
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use ManiaControl\ManiaControl;
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/**
* Asynchronous File Reader
*
* @author kremsy & steeffeen
*/
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class AsynchronousFileReader {
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/**
* Constants
*/
const TIMEOUT_ERROR = 'Timed out while reading data';
const RESPONSE_ERROR = 'Connection or response error';
const NO_DATA_ERROR = 'No data returned';
const INVALID_RESULT_ERROR = 'Invalid Result';
const SOCKET_TIMEOUT = 10;
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/**
* Private Properties
*/
private $sockets = array();
private $maniaControl = null;
/**
* Construct
*
* @param ManiaControl $maniaControl
*/
public function __construct(ManiaControl $maniaControl) {
$this->maniaControl = $maniaControl;
}
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/**
* Appends the Data
*/
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public function appendData() {
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foreach($this->sockets as $key => &$socket) {
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/** @var SocketStructure $socket */
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$socket->streamBuffer .= fread($socket->socket, 4096);
if (feof($socket->socket) || time() > ($socket->creationTime + self::SOCKET_TIMEOUT)) {
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fclose($socket->socket);
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unset($this->sockets[$key]);
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$result = "";
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$error = 0;
if (time() > ($socket->creationTime + self::SOCKET_TIMEOUT)) {
$error = self::TIMEOUT_ERROR;
} else if (substr($socket->streamBuffer, 9, 3) != "200") {
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$error = self::RESPONSE_ERROR;
$result = $this->parseResult($socket->streamBuffer);
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} else if ($socket->streamBuffer == '') {
$error = self::NO_DATA_ERROR;
} else {
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$result = $this->parseResult($socket->streamBuffer);
if ($result == self::INVALID_RESULT_ERROR) {
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$error = self::INVALID_RESULT_ERROR;
}
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}
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call_user_func($socket->function, $result, $error);
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}
}
}
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/**
* Parse the Stream Result
*
* @param $streamBuffer
* @return string
*/
private function parseResult($streamBuffer) {
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$resultArray = explode("\r\n\r\n", $streamBuffer, 2);
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switch(count($resultArray)) {
case 0:
return self::INVALID_RESULT_ERROR;
case 1:
return '';
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}
$header = $this->parseHeader($resultArray[0]);
if (isset($header["transfer-encoding"])) {
$result = $this->decode_chunked($resultArray[1]);
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} else {
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$result = $resultArray[1];
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}
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return $result;
}
/**
* Decode Chunks
*
* @param $str
* @return string
*/
private function decode_chunked($str) {
for($res = ''; !empty($str); $str = trim($str)) {
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$pos = strpos($str, "\r\n");
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$len = hexdec(substr($str, 0, $pos));
$res .= substr($str, $pos + 2, $len);
$str = substr($str, $pos + 2 + $len);
}
return $res;
}
/**
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* Parse the Header
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*
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* @param $header
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* @return array
*/
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function parseHeader($header) {
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$headers = explode("\r\n", $header);
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$output = array();
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if ('HTTP' === substr($headers[0], 0, 4)) {
list(, $output['status'], $output['status_text']) = explode(' ', $headers[0]);
unset($headers[0]);
}
foreach($headers as $v) {
$h = preg_split('/:\s*/', $v);
$output[strtolower($h[0])] = $h[1];
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}
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return $output;
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}
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/**
* Load a remote file
*
* @param string $url
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* @param $function
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* @param string $contentType
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* @param string $customHeader
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* @return bool
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*/
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public function loadFile($url, $function, $contentType = 'UTF-8', $customHeader = '') {
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if (!is_callable($function)) {
$this->maniaControl->log("Function is not callable");
return false;
}
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if (!$url) {
return null;
}
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$urlData = parse_url($url);
$port = (isset($urlData['port']) ? $urlData['port'] : 80);
$urlQuery = isset($urlData['query']) ? "?" . $urlData['query'] : "";
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$socket = @fsockopen($urlData['host'], $port, $errno, $errstr, 4);
if (!$socket) {
return false;
}
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if ($customHeader == '') {
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$query = 'GET ' . $urlData['path'] . $urlQuery . ' HTTP/1.1' . PHP_EOL;
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$query .= 'Host: ' . $urlData['host'] . PHP_EOL;
$query .= 'Content-Type: ' . $contentType . PHP_EOL;
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$query .= 'Connection: close' . PHP_EOL;
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$query .= 'User-Agent: ManiaControl v' . ManiaControl::VERSION . PHP_EOL;
$query .= PHP_EOL;
} else {
$query = $customHeader;
}
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fwrite($socket, $query);
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$success = stream_set_blocking($socket, 0);
if (!$success) {
return false;
}
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$socketStructure = new SocketStructure($url, $socket, $function);
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array_push($this->sockets, $socketStructure);
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return true;
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}
}