Adapters
8 years ago
Providers
8 years ago
Autoload.php
8 years ago
Embera.php
8 years ago
FakeResponse.php
8 years ago
Formatter.php
8 years ago
HtmlProcessor.php
8 years ago
HttpRequest.php
8 years ago
Oembed.php
8 years ago
Providers.php
8 years ago
Url.php
8 years ago
HttpRequest.php
163 lines
| 1 | <?php |
| 2 | /** |
| 3 | * HttpRequest.php |
| 4 | * |
| 5 | * @package Embera |
| 6 | * @author Michael Pratt <pratt@hablarmierda.net> |
| 7 | * @link http://www.michael-pratt.com/ |
| 8 | * |
| 9 | * For the full copyright and license information, please view the LICENSE |
| 10 | * file that was distributed with this source code. |
| 11 | */ |
| 12 | |
| 13 | namespace Embera; |
| 14 | |
| 15 | /** |
| 16 | * This class is in charge of doing http requests. Its a very minimal |
| 17 | * wrapper for curl or file_get_contents |
| 18 | */ |
| 19 | class HttpRequest |
| 20 | { |
| 21 | /** @var array Array with custom curl/fopen options */ |
| 22 | protected $config = array(); |
| 23 | |
| 24 | /** @var string User Agent String */ |
| 25 | protected $userAgent = 'Mozilla/5.0 PHP/Embera'; |
| 26 | |
| 27 | /** |
| 28 | * Constructor |
| 29 | * |
| 30 | * @param array $config |
| 31 | */ |
| 32 | public function __construct(array $config = array()) |
| 33 | { |
| 34 | $this->config = array_merge(array( |
| 35 | 'curl' => array(), |
| 36 | 'fopen' => array(), |
| 37 | 'force_redirects' => false, |
| 38 | 'prefer_curl' => true, |
| 39 | ), $config); |
| 40 | } |
| 41 | |
| 42 | /** |
| 43 | * Executes http requests |
| 44 | * |
| 45 | * @param string $url |
| 46 | * @param array $params Additional parameters for the respective part |
| 47 | * @return string |
| 48 | * |
| 49 | * @throws Exception when an error ocurred or if no way to do a request exists |
| 50 | */ |
| 51 | public function fetch($url, array $params = array()) |
| 52 | { |
| 53 | $params = array_merge(array( |
| 54 | 'curl' => array(), |
| 55 | 'fopen' => array(), |
| 56 | ), $params); |
| 57 | |
| 58 | if (function_exists('curl_init') && $this->config['prefer_curl']) { |
| 59 | return $this->curl($url, $params['curl']); |
| 60 | } |
| 61 | |
| 62 | return $this->fileGetContents($url, $params['fopen']); |
| 63 | } |
| 64 | |
| 65 | /** |
| 66 | * Uses Curl to fetch data from an url |
| 67 | * |
| 68 | * @param string $url |
| 69 | * @param array $params Additional parameters for the respective part |
| 70 | * @return string |
| 71 | * |
| 72 | * @throws Exception when the returned status code is not 200 or no data was found |
| 73 | */ |
| 74 | protected function curl($url, array $params = array()) |
| 75 | { |
| 76 | // Not using array_merge here because that function reindexes numeric keys |
| 77 | $options = $params + $this->config['curl'] + array( |
| 78 | CURLOPT_USERAGENT => $this->userAgent, |
| 79 | CURLOPT_ENCODING => '', |
| 80 | CURLOPT_FOLLOWLOCATION => true, |
| 81 | ); |
| 82 | |
| 83 | $options[CURLOPT_URL] = $url; |
| 84 | $options[CURLOPT_HEADER] = true; |
| 85 | $options[CURLOPT_RETURNTRANSFER] = 1; |
| 86 | |
| 87 | // CURLOPT_FOLLOWLOCATION doesnt play well with open_basedir/safe_mode |
| 88 | if (ini_get('safe_mode') || ini_get('open_basedir')) { |
| 89 | $options[CURLOPT_FOLLOWLOCATION] = false; |
| 90 | $options[CURLOPT_TIMEOUT] = 15; |
| 91 | $this->config['force_redirects'] = true; |
| 92 | } |
| 93 | |
| 94 | $handler = curl_init(); |
| 95 | curl_setopt_array($handler, $options); |
| 96 | $response = curl_exec($handler); |
| 97 | |
| 98 | $status = curl_getinfo($handler, CURLINFO_HTTP_CODE); |
| 99 | $headerSize = curl_getinfo($handler, CURLINFO_HEADER_SIZE); |
| 100 | |
| 101 | $header = substr($response, 0, $headerSize); |
| 102 | $body = substr($response, $headerSize); |
| 103 | curl_close($handler); |
| 104 | |
| 105 | if ($this->config['force_redirects'] && in_array($status, array('301', '302'))) { |
| 106 | |
| 107 | if (preg_match('~(?:location|uri): ?([^\n]+)~i', $header, $matches)) { |
| 108 | |
| 109 | $url = trim($matches['1']); |
| 110 | |
| 111 | // Relative redirections |
| 112 | if (substr($url, 0, 1) == '/') { |
| 113 | $parsed = parse_url($options[CURLOPT_URL]); |
| 114 | $url = $parsed['scheme'] . '://' . rtrim($parsed['host'], '/') . $url; |
| 115 | } |
| 116 | |
| 117 | return $this->curl($url, $options); |
| 118 | } |
| 119 | } |
| 120 | |
| 121 | if (empty($body) || !in_array($status, array('200'))) { |
| 122 | throw new \Exception($status . ': Invalid response for ' . $url); |
| 123 | } |
| 124 | |
| 125 | return $body; |
| 126 | } |
| 127 | |
| 128 | /** |
| 129 | * Uses file_get_contents to fetch data from an url |
| 130 | * |
| 131 | * @param string $url |
| 132 | * @param array $params Additional parameters for the respective part |
| 133 | * @return string |
| 134 | * |
| 135 | * @throws Exception when allow_url_fopen is disabled or when no data was returned |
| 136 | */ |
| 137 | protected function fileGetContents($url, array $params = array()) |
| 138 | { |
| 139 | if (!ini_get('allow_url_fopen')) { |
| 140 | throw new \Exception('Could not execute lookup, allow_url_fopen is disabled'); |
| 141 | } |
| 142 | |
| 143 | if (!filter_var($url, FILTER_VALIDATE_URL)) { |
| 144 | throw new \Exception('Invalid url ' . $url); |
| 145 | } |
| 146 | |
| 147 | $defaultOptions = array( |
| 148 | 'method' => 'GET', |
| 149 | 'user_agent' => $this->userAgent, |
| 150 | 'follow_location' => 1, |
| 151 | 'max_redirects' => 20, |
| 152 | 'timeout' => 40 |
| 153 | ); |
| 154 | |
| 155 | $context = array('http' => array_merge($defaultOptions, $this->config['fopen'], $params)); |
| 156 | if ($data = file_get_contents($url, false, stream_context_create($context))) { |
| 157 | return $data; |
| 158 | } |
| 159 | |
| 160 | throw new \Exception('Invalid Server Response from ' . $url); |
| 161 | } |
| 162 | } |
| 163 |