SimpleMachines /
SMF2.1
| @@ 218-224 (lines=7) @@ | ||
| 215 | ||
| 216 | // Check whether the ETag was sent back, and cache based on that... |
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| 217 | $eTag = '"' . substr($_REQUEST['attach'] . $file['filePath'] . filemtime($file['filePath']), 0, 64) . '"'; |
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| 218 | if (!empty($_SERVER['HTTP_IF_NONE_MATCH']) && strpos($_SERVER['HTTP_IF_NONE_MATCH'], $eTag) !== false) |
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| 219 | { |
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| 220 | ob_end_clean(); |
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| 221 | ||
| 222 | header('HTTP/1.1 304 Not Modified'); |
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| 223 | exit; |
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| 224 | } |
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| 225 | ||
| 226 | // If this is a partial download, we need to determine what data range to send |
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| 227 | $range = 0; |
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| @@ 137-141 (lines=5) @@ | ||
| 134 | } |
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| 135 | ||
| 136 | $eTag = '"' . substr(sha1($request) . $cached['time'], 0, 64) . '"'; |
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| 137 | if (!empty($_SERVER['HTTP_IF_NONE_MATCH']) && strpos($_SERVER['HTTP_IF_NONE_MATCH'], $eTag) !== false) |
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| 138 | { |
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| 139 | header('HTTP/1.1 304 Not Modified'); |
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| 140 | exit; |
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| 141 | } |
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| 142 | ||
| 143 | // Make sure we're serving an image |
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| 144 | $contentParts = explode('/', !empty($cached['content_type']) ? $cached['content_type'] : ''); |
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