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34 lines
725 B
34 lines
725 B
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/*! |
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* Connect - responseTime |
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* Copyright(c) 2011 TJ Holowaychuk |
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* MIT Licensed |
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*/ |
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/** |
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* Adds the `X-Response-Time` header displaying the response |
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* duration in milliseconds. |
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* |
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* @return {Function} |
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* @api public |
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*/ |
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module.exports = function responseTime(){ |
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return function(req, res, next){ |
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var writeHead = res.writeHead |
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, start = new Date; |
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if (res._responseTime) return next(); |
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res._responseTime = true; |
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// proxy writeHead to calculate duration |
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res.writeHead = function(status, headers){ |
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var duration = new Date - start; |
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res.setHeader('X-Response-Time', duration + 'ms'); |
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res.writeHead = writeHead; |
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res.writeHead(status, headers); |
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}; |
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next(); |
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}; |
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};
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