139 lines
3.1 KiB
PHP
139 lines
3.1 KiB
PHP
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<?php
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namespace PicoFeed;
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require_once __DIR__.'/Logging.php';
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abstract class Client
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{
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public $etag = '';
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public $last_modified = '';
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public $is_modified = true;
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public $content = '';
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public $url = '';
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public $timeout = 10;
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public $max_redirects = 5;
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public $max_body_size = 2097152; // 2MB
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public $user_agent = 'PicoFeed (https://github.com/fguillot/picoFeed)';
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public static function create($adapter = null)
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{
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return $adapter ?: self::chooseAdapter();
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}
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public static function chooseAdapter()
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{
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if (function_exists('curl_init')) {
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require_once __DIR__.'/Clients/Curl.php';
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return new Clients\Curl;
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} else if (ini_get('allow_url_fopen')) {
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require_once __DIR__.'/Clients/Stream.php';
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return new Clients\Stream;
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}
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throw new \LogicException('You must have "allow_url_fopen=1" or curl extension installed');
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}
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public function execute()
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{
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if ($this->url === '') {
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throw new \LogicException('The URL is missing');
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}
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Logging::log('Fetch URL: '.$this->url);
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Logging::log('Etag: '.$this->etag);
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Logging::log('Last-Modified: '.$this->last_modified);
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$response = $this->doRequest();
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if (is_array($response)) {
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if ($response['status'] == 304) {
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$this->is_modified = false;
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}
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else {
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$this->etag = isset($response['headers']['ETag']) ? $response['headers']['ETag'] : '';
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$this->last_modified = isset($response['headers']['Last-Modified']) ? $response['headers']['Last-Modified'] : '';
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$this->content = $response['body'];
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}
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}
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}
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public function parseHeaders(array $lines)
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{
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$status = 200;
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$headers = array();
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foreach ($lines as $line) {
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if (strpos($line, 'HTTP') === 0 && strpos($line, '301') === false && strpos($line, '302') === false) {
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$status = (int) substr($line, 9, 3);
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}
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else if (strpos($line, ':') !== false) {
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list($name, $value) = explode(': ', $line);
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$headers[trim($name)] = trim($value);
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}
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}
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Logging::log('HTTP status code: '.$status);
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foreach ($headers as $name => $value) {
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Logging::log('HTTP headers: '.$name.' => '.$value);
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}
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return array($status, $headers);
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}
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public function setLastModified($last_modified)
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{
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$this->last_modified = $last_modified;
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return $this;
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}
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public function getLastModified()
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{
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return $this->last_modified;
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}
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public function setEtag($etag)
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{
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$this->etag = $etag;
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return $this;
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}
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public function getEtag()
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{
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return $this->etag;
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}
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public function getUrl()
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{
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return $this->url;
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}
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public function getContent()
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{
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return $this->content;
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}
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public function isModified()
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{
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return $this->is_modified;
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}
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}
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