111 lines
3.2 KiB
PHP
111 lines
3.2 KiB
PHP
<?php
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namespace PicoFeed\Clients;
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use \PicoFeed\Logging;
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/**
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* Stream context HTTP client
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*
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* @author Frederic Guillot
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* @package client
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*/
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class Stream extends \PicoFeed\Client
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{
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/**
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* Do the HTTP request
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*
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* @access public
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* @return array HTTP response ['body' => ..., 'status' => ..., 'headers' => ...]
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*/
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public function doRequest()
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{
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// Prepare HTTP headers for the request
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$headers = array(
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'Connection: close',
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'User-Agent: '.$this->user_agent,
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'Accept-Encoding: gzip',
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);
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if ($this->etag) $headers[] = 'If-None-Match: '.$this->etag;
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if ($this->last_modified) $headers[] = 'If-Modified-Since: '.$this->last_modified;
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// Create context
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$context_options = array(
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'http' => array(
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'method' => 'GET',
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'protocol_version' => 1.1,
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'timeout' => $this->timeout,
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'max_redirects' => $this->max_redirects,
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'header' => implode("\r\n", $headers)
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)
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);
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if (parent::$proxy_hostname) {
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$context_options['http']['proxy'] = 'tcp://'.parent::$proxy_hostname.':'.parent::$proxy_port;
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$context_options['http']['request_fulluri'] = true;
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if (parent::$proxy_username) {
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$headers[] = 'Proxy-Authorization: Basic '.base64_encode(parent::$proxy_username.':'.parent::$proxy_password);
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$context_options['http']['header'] = implode("\r\n", $headers);
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}
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}
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$context = stream_context_create($context_options);
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// Make HTTP request
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$stream = @fopen($this->url, 'r', false, $context);
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if (! is_resource($stream)) return false;
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// Get the entire body until the max size
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$body = stream_get_contents($stream, $this->max_body_size + 1);
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// If the body size is too large abort everything
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if (strlen($body) > $this->max_body_size) return false;
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// Get HTTP headers response
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$metadata = stream_get_meta_data($stream);
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list($status, $headers) = $this->parseHeaders($metadata['wrapper_data']);
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fclose($stream);
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if (isset($headers['Transfer-Encoding']) && $headers['Transfer-Encoding'] === 'chunked') {
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$body = $this->decodeChunked($body);
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}
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if (isset($headers['Content-Encoding']) && $headers['Content-Encoding'] === 'gzip') {
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$body = gzdecode($body);
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}
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return array(
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'status' => $status,
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'body' => $body,
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'headers' => $headers
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);
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}
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/**
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* Decode a chunked body
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*
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* @access public
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* @param string $str Raw body
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* @return string Decoded body
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*/
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public function decodeChunked($str)
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{
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for ($result = ''; ! empty($str); $str = trim($str)) {
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// Get the chunk length
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$pos = strpos($str, "\r\n");
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$len = hexdec(substr($str, 0, $pos));
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// Append the chunk to the result
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$result .= substr($str, $pos + 2, $len);
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$str = substr($str, $pos + 2 + $len);
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}
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return $result;
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}
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}
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