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54 lines
1.5 KiB
54 lines
1.5 KiB
10 years ago
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<?php
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function getRssFeed($feed_uri, $reload = false)
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{
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$meta_file = md5($feed_uri) . '.json';
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$meta = @json_decode(@file_get_contents($meta_file), true);
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$ch = curl_init();
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curl_setopt($ch, CURLOPT_URL, $feed_uri);
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curl_setopt($ch, CURLOPT_CONNECTTIMEOUT, 20);
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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($ch, CURLOPT_FOLLOWLOCATION, true);
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if (!$reload) {
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if (isset($meta['etag']))
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curl_setopt($ch, CURLOPT_HTTPHEADER, array('If-None-Match: ' . $meta['etag']));
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if (isset($meta['lastModified']))
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curl_setopt($ch, CURLOPT_HTTPHEADER, array('If-Modified-Since: ' . $meta['lastModified']));
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}
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$response = curl_exec($ch);
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$info = curl_getinfo($ch);
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$http_code = $info['http_code'];
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if ($http_code !== 200)
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return false;
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$headers = substr($response, 0, $info['header_size']);
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$headers_arr = array();
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foreach (explode("\n", $headers) as $h) {
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$h = explode(':', $h, 2);
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if (!isset($h[1])) continue;
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$key = $h[0];
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$value = trim($h[1]);
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if (!isset($headers_arr[$key]))
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$headers_arr[$key] = $value;
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elseif (is_array($headers[$key]))
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$headers_arr[$key][] = $value;
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else
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$headers_arr[$key] = array($headers_arr[$key], $value);
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}
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$meta = array();
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if (isset($headers_arr['Etag']))
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$meta['etag'] = $headers_arr['Etag'];
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if (isset($headers_arr['Last-Modified']))
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$meta['lastModified'] = $headers_arr['Last-Modified'];
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file_put_contents($meta_file, json_encode($meta));
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$body = substr($response, $info['header_size']);
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return @simplexml_load_string($body);
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}
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