Current Dev State

static/js/ketcher2/node_modules/stacked/stacked.js

@@ -0,0 +1,67 @@
+var URL = require('url')
+
+module.exports = function(/* fn1, fn2, ... */) {
+  var handle = function (req, res, out) {
+    var i = 0
+    function next(err) {
+      var layer = handle.layers[i++]
+
+      if (!layer || res.headersSent) {
+        // all done
+        if (out) return out(err) // delegate to parent
+
+        if (err && res.statusCode < 400) res.statusCode = err.status || 500
+        else res.statusCode = 404
+
+        return res.end()
+      }
+
+      try {
+        layer(req, res, next)
+      }
+      catch (e) {
+        next(e)
+      }
+    }
+    next()
+  }
+
+  handle.layers = Array.prototype.slice.call(arguments)
+
+  handle.use = function(fn) {
+    if (typeof fn == 'object' && fn.handle) fn = fn.handle.bind(fn)
+    handle.layers.push(fn)
+    return this
+  }
+
+  handle.mount = function(path, fn) {
+    return this.use(sub(path, fn))
+  }
+
+  return handle
+}
+
+function sub(mount, fn) {
+  if (mount.substr(-1) != '/') mount += '/'
+  if (typeof fn == 'object' && fn.handle) fn = fn.handle.bind(fn)
+
+  return function(req, res, next) {
+    var url = req.url
+      , uri = req.uri
+
+    if (url.substr(0, mount.length) !== mount && url.substr(0, mount.length) + '/' !== mount) return next()
+
+    // modify the URL
+    if (!req.realUrl) req.realUrl = url
+
+    req.url = url.substr(mount.length-1)
+    if (req.uri) req.uri = URL.parse(req.url)
+
+    fn(req, res, function(err) {
+      // reset the URL
+      req.url = url
+      req.uri = uri
+      next(err)
+    })
+  }
+}