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app_vue/node_modules/express/lib/router/layer.js

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+/*!
+ * express
+ * Copyright(c) 2009-2013 TJ Holowaychuk
+ * Copyright(c) 2013 Roman Shtylman
+ * Copyright(c) 2014-2015 Douglas Christopher Wilson
+ * MIT Licensed
+ */
+
+'use strict';
+
+/**
+ * Module dependencies.
+ * @private
+ */
+
+var pathRegexp = require('path-to-regexp');
+var debug = require('debug')('express:router:layer');
+
+/**
+ * Module variables.
+ * @private
+ */
+
+var hasOwnProperty = Object.prototype.hasOwnProperty;
+
+/**
+ * Module exports.
+ * @public
+ */
+
+module.exports = Layer;
+
+function Layer(path, options, fn) {
+  if (!(this instanceof Layer)) {
+    return new Layer(path, options, fn);
+  }
+
+  debug('new %o', path)
+  var opts = options || {};
+
+  this.handle = fn;
+  this.name = fn.name || '<anonymous>';
+  this.params = undefined;
+  this.path = undefined;
+  this.regexp = pathRegexp(path, this.keys = [], opts);
+
+  // set fast path flags
+  this.regexp.fast_star = path === '*'
+  this.regexp.fast_slash = path === '/' && opts.end === false
+}
+
+/**
+ * Handle the error for the layer.
+ *
+ * @param {Error} error
+ * @param {Request} req
+ * @param {Response} res
+ * @param {function} next
+ * @api private
+ */
+
+Layer.prototype.handle_error = function handle_error(error, req, res, next) {
+  var fn = this.handle;
+
+  if (fn.length !== 4) {
+    // not a standard error handler
+    return next(error);
+  }
+
+  try {
+    fn(error, req, res, next);
+  } catch (err) {
+    next(err);
+  }
+};
+
+/**
+ * Handle the request for the layer.
+ *
+ * @param {Request} req
+ * @param {Response} res
+ * @param {function} next
+ * @api private
+ */
+
+Layer.prototype.handle_request = function handle(req, res, next) {
+  var fn = this.handle;
+
+  if (fn.length > 3) {
+    // not a standard request handler
+    return next();
+  }
+
+  try {
+    fn(req, res, next);
+  } catch (err) {
+    next(err);
+  }
+};
+
+/**
+ * Check if this route matches `path`, if so
+ * populate `.params`.
+ *
+ * @param {String} path
+ * @return {Boolean}
+ * @api private
+ */
+
+Layer.prototype.match = function match(path) {
+  var match
+
+  if (path != null) {
+    // fast path non-ending match for / (any path matches)
+    if (this.regexp.fast_slash) {
+      this.params = {}
+      this.path = ''
+      return true
+    }
+
+    // fast path for * (everything matched in a param)
+    if (this.regexp.fast_star) {
+      this.params = {'0': decode_param(path)}
+      this.path = path
+      return true
+    }
+
+    // match the path
+    match = this.regexp.exec(path)
+  }
+
+  if (!match) {
+    this.params = undefined;
+    this.path = undefined;
+    return false;
+  }
+
+  // store values
+  this.params = {};
+  this.path = match[0]
+
+  var keys = this.keys;
+  var params = this.params;
+
+  for (var i = 1; i < match.length; i++) {
+    var key = keys[i - 1];
+    var prop = key.name;
+    var val = decode_param(match[i])
+
+    if (val !== undefined || !(hasOwnProperty.call(params, prop))) {
+      params[prop] = val;
+    }
+  }
+
+  return true;
+};
+
+/**
+ * Decode param value.
+ *
+ * @param {string} val
+ * @return {string}
+ * @private
+ */
+
+function decode_param(val) {
+  if (typeof val !== 'string' || val.length === 0) {
+    return val;
+  }
+
+  try {
+    return decodeURIComponent(val);
+  } catch (err) {
+    if (err instanceof URIError) {
+      err.message = 'Failed to decode param \'' + val + '\'';
+      err.status = err.statusCode = 400;
+    }
+
+    throw err;
+  }
+}