permet l'ajout des frameworks et des routes

app/node_modules/statuses/index.js

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+/*!
+ * statuses
+ * Copyright(c) 2014 Jonathan Ong
+ * Copyright(c) 2016 Douglas Christopher Wilson
+ * MIT Licensed
+ */
+
+'use strict'
+
+/**
+ * Module dependencies.
+ * @private
+ */
+
+var codes = require('./codes.json')
+
+/**
+ * Module exports.
+ * @public
+ */
+
+module.exports = status
+
+// status code to message map
+status.message = codes
+
+// status message (lower-case) to code map
+status.code = createMessageToStatusCodeMap(codes)
+
+// array of status codes
+status.codes = createStatusCodeList(codes)
+
+// status codes for redirects
+status.redirect = {
+  300: true,
+  301: true,
+  302: true,
+  303: true,
+  305: true,
+  307: true,
+  308: true
+}
+
+// status codes for empty bodies
+status.empty = {
+  204: true,
+  205: true,
+  304: true
+}
+
+// status codes for when you should retry the request
+status.retry = {
+  502: true,
+  503: true,
+  504: true
+}
+
+/**
+ * Create a map of message to status code.
+ * @private
+ */
+
+function createMessageToStatusCodeMap (codes) {
+  var map = {}
+
+  Object.keys(codes).forEach(function forEachCode (code) {
+    var message = codes[code]
+    var status = Number(code)
+
+    // populate map
+    map[message.toLowerCase()] = status
+  })
+
+  return map
+}
+
+/**
+ * Create a list of all status codes.
+ * @private
+ */
+
+function createStatusCodeList (codes) {
+  return Object.keys(codes).map(function mapCode (code) {
+    return Number(code)
+  })
+}
+
+/**
+ * Get the status code for given message.
+ * @private
+ */
+
+function getStatusCode (message) {
+  var msg = message.toLowerCase()
+
+  if (!Object.prototype.hasOwnProperty.call(status.code, msg)) {
+    throw new Error('invalid status message: "' + message + '"')
+  }
+
+  return status.code[msg]
+}
+
+/**
+ * Get the status message for given code.
+ * @private
+ */
+
+function getStatusMessage (code) {
+  if (!Object.prototype.hasOwnProperty.call(status.message, code)) {
+    throw new Error('invalid status code: ' + code)
+  }
+
+  return status.message[code]
+}
+
+/**
+ * Get the status code.
+ *
+ * Given a number, this will throw if it is not a known status
+ * code, otherwise the code will be returned. Given a string,
+ * the string will be parsed for a number and return the code
+ * if valid, otherwise will lookup the code assuming this is
+ * the status message.
+ *
+ * @param {string|number} code
+ * @returns {number}
+ * @public
+ */
+
+function status (code) {
+  if (typeof code === 'number') {
+    return getStatusMessage(code)
+  }
+
+  if (typeof code !== 'string') {
+    throw new TypeError('code must be a number or string')
+  }
+
+  // '403'
+  var n = parseInt(code, 10)
+  if (!isNaN(n)) {
+    return getStatusMessage(n)
+  }
+
+  return getStatusCode(code)
+}