38 lines
1.3 KiB
JavaScript
38 lines
1.3 KiB
JavaScript
/**
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* Analyzes if HTTP responses keep the connections alive.
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*/
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exports.version = '0.1';
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exports.module = function(phantomas) {
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'use strict';
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phantomas.setMetric('closedConnections'); // @desc requests not keeping the connection alive and slowing down the next request @offenders
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var closedConnectionHosts = {};
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phantomas.on('recv', function(entry, res) {
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var connectionHeader = (entry.headers.Connection || '').toLowerCase();
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// Taking the protocol in account, in case the same domain is called with two different protocols.
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var host = entry.protocol + '://' + entry.domain;
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if (connectionHeader.indexOf('close') >= 0) {
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// Don't blame it immediatly, wait to see if the connection is needed a second time.
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closedConnectionHosts[host] = entry.url;
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}
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});
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phantomas.on('send', function(entry, res) {
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var host = entry.protocol + '://' + entry.domain;
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var previousClosedConnection = closedConnectionHosts[host];
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if (previousClosedConnection) {
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// There was a closed connection. We can blame it safely now!
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phantomas.incrMetric('closedConnections');
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phantomas.addOffender('closedConnections', previousClosedConnection);
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closedConnectionHosts[host] = null;
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}
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});
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};
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