166 lines
3.8 KiB
PHP
166 lines
3.8 KiB
PHP
<?php
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namespace PicoFeed;
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class RemoteResource
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{
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public $user_agent;
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public $timeout;
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public $url;
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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 $content = '';
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public function __construct($url, $timeout = 5, $user_agent = 'PicoFeed (https://github.com/fguillot/picoFeed)')
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{
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$this->url = $url;
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$this->timeout = $timeout;
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$this->user_agent = $user_agent;
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return $this;
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}
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public function setLastModified($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 $this->is_modified;
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}
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public function execute()
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{
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$response = $this->makeRequest();
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$this->etag = isset($response['headers']['ETag']) ? $response['headers']['ETag'] : '';
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$this->last_modified = isset($response['headers']['Last-Modified']) ? $response['headers']['Last-Modified'] : '';
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if ($response['status'] == 304) {
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$this->is_modified = false;
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}
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else if ($response['status'] == 301 || $response['status'] == 302) {
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if (isset($response['headers']['Location'])) {
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$this->url = $response['headers']['Location'];
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}
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else if (isset($response['headers']['location'])) {
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$this->url = $response['headers']['location'];
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}
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$this->execute();
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}
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else {
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$this->content = $response['body'];
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}
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}
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public function makeRequest()
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{
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$http_code = 200;
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$http_body = '';
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$http_headers = array();
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if (! function_exists('curl_init')) {
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$http_body = @file_get_contents($this->url);
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}
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else {
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$headers = array('Connection: close');
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if ($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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$ch = curl_init();
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curl_setopt($ch, CURLOPT_URL, $this->url);
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curl_setopt($ch, CURLOPT_HEADER, true);
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curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
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curl_setopt($ch, CURLOPT_CONNECTTIMEOUT, $this->timeout);
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curl_setopt($ch, CURLOPT_USERAGENT, $this->user_agent);
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curl_setopt($ch, CURLOPT_HTTPHEADER, $headers);
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curl_setopt($ch, CURLOPT_FOLLOWLOCATION, false);
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$http_response = curl_exec($ch);
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$http_code = curl_getinfo($ch, CURLINFO_HTTP_CODE);
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$http_body = '';
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$http_headers = array();
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curl_close($ch);
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$lines = explode("\r\n", $http_response);
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$body_start = 0;
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$i = 0;
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foreach ($lines as $line) {
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if ($line === '') {
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$body_start = $i;
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break;
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}
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else if (($p = strpos($line, ':')) !== false) {
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$key = substr($line, 0, $p);
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$value = substr($line, $p + 1);
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$http_headers[trim($key)] = trim($value);
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}
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$i++;
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}
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$http_body = implode("\r\n", array_splice($lines, $i + 1));
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}
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return array(
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'status' => $http_code,
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'body' => $http_body,
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'headers' => $http_headers
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);
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}
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} |