Install the "express" node module via npm

[obsolete/notmuch-web] / node_modules / express / node_modules / connect / lib / middleware / responseTime.js

diff --git a/node_modules/express/node_modules/connect/lib/middleware/responseTime.js b/node_modules/express/node_modules/connect/lib/middleware/responseTime.js
new file mode 100644 (file)
index 0000000..2b2133a
--- /dev/null
+++ b/node_modules/express/node_modules/connect/lib/middleware/responseTime.js
@@ -0,0 +1,34 @@
+
+/*!
+ * Connect - responseTime
+ * Copyright(c) 2011 TJ Holowaychuk
+ * MIT Licensed
+ */
+
+/**
+ * Adds the `X-Response-Time` header displaying the response
+ * duration in milliseconds.
+ *
+ * @return {Function}
+ * @api public
+ */
+
+module.exports = function responseTime(){
+  return function(req, res, next){
+    var writeHead = res.writeHead
+      , start = new Date;
+
+    if (res._responseTime) return next();
+    res._responseTime = true;
+
+    // proxy writeHead to calculate duration
+    res.writeHead = function(status, headers){
+      var duration = new Date - start;
+      res.setHeader('X-Response-Time', duration + 'ms');
+      res.writeHead = writeHead;
+      res.writeHead(status, headers);
+    };
+
+    next();
+  };
+};