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miercuri, 29 aprilie 2015

[OmniFaces utilities (2.0)] Get the default resource maximum age in milliseconds


[OmniFaces utilities] The getDefaultResourceMaxAge() method returns the default resource maximum age in milliseconds.

Method:
Usage:

import org.omnifaces.util.Hacks;
...
// e.g. 604800000 milliseconds
long maxAge = Hacks.getDefaultResourceMaxAge();

OmniFaces uses this method to set the Expires response header in org.omnifaces.resourcehandler.DynamicResource:

@Override
public Map<String, String> getResponseHeaders() {
 Map<String, String> responseHeaders = new HashMap<>(RESPONSE_HEADERS_SIZE);
 responseHeaders.put("Last-Modified", formatRFC1123(new Date(getLastModified())));
 responseHeaders.put("Expires", formatRFC1123(new Date(System.currentTimeMillis() + Hacks.getDefaultResourceMaxAge())));
 responseHeaders.put("Etag", String.format("W/\"%d-%d\"", getResourceName().hashCode(), getLastModified()));
 responseHeaders.put("Pragma", ""); // Explicitly set empty pragma to prevent some containers from setting it.
 return responseHeaders;
}

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