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53 lines
1.5 KiB
53 lines
1.5 KiB
<?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_arr[$key])) |
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$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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