--- /dev/null
+/*!
+ * http-errors
+ * Copyright(c) 2014 Jonathan Ong
+ * Copyright(c) 2016 Douglas Christopher Wilson
+ * MIT Licensed
+ */
+
+'use strict'
+
+/**
+ * Module dependencies.
+ * @private
+ */
+
+var deprecate = require('depd')('http-errors')
+var setPrototypeOf = require('setprototypeof')
+var statuses = require('statuses')
+var inherits = require('inherits')
+
+/**
+ * Module exports.
+ * @public
+ */
+
+module.exports = createError
+module.exports.HttpError = createHttpErrorConstructor()
+
+// Populate exports for all constructors
+populateConstructorExports(module.exports, statuses.codes, module.exports.HttpError)
+
+/**
+ * Get the code class of a status code.
+ * @private
+ */
+
+function codeClass (status) {
+ return Number(String(status).charAt(0) + '00')
+}
+
+/**
+ * Create a new HTTP Error.
+ *
+ * @returns {Error}
+ * @public
+ */
+
+function createError () {
+ // so much arity going on ~_~
+ var err
+ var msg
+ var status = 500
+ var props = {}
+ for (var i = 0; i < arguments.length; i++) {
+ var arg = arguments[i]
+ if (arg instanceof Error) {
+ err = arg
+ status = err.status || err.statusCode || status
+ continue
+ }
+ switch (typeof arg) {
+ case 'string':
+ msg = arg
+ break
+ case 'number':
+ status = arg
+ if (i !== 0) {
+ deprecate('non-first-argument status code; replace with createError(' + arg + ', ...)')
+ }
+ break
+ case 'object':
+ props = arg
+ break
+ }
+ }
+
+ if (typeof status === 'number' && (status < 400 || status >= 600)) {
+ deprecate('non-error status code; use only 4xx or 5xx status codes')
+ }
+
+ if (typeof status !== 'number' ||
+ (!statuses[status] && (status < 400 || status >= 600))) {
+ status = 500
+ }
+
+ // constructor
+ var HttpError = createError[status] || createError[codeClass(status)]
+
+ if (!err) {
+ // create error
+ err = HttpError
+ ? new HttpError(msg)
+ : new Error(msg || statuses[status])
+ Error.captureStackTrace(err, createError)
+ }
+
+ if (!HttpError || !(err instanceof HttpError) || err.status !== status) {
+ // add properties to generic error
+ err.expose = status < 500
+ err.status = err.statusCode = status
+ }
+
+ for (var key in props) {
+ if (key !== 'status' && key !== 'statusCode') {
+ err[key] = props[key]
+ }
+ }
+
+ return err
+}
+
+/**
+ * Create HTTP error abstract base class.
+ * @private
+ */
+
+function createHttpErrorConstructor () {
+ function HttpError () {
+ throw new TypeError('cannot construct abstract class')
+ }
+
+ inherits(HttpError, Error)
+
+ return HttpError
+}
+
+/**
+ * Create a constructor for a client error.
+ * @private
+ */
+
+function createClientErrorConstructor (HttpError, name, code) {
+ var className = name.match(/Error$/) ? name : name + 'Error'
+
+ function ClientError (message) {
+ // create the error object
+ var msg = message != null ? message : statuses[code]
+ var err = new Error(msg)
+
+ // capture a stack trace to the construction point
+ Error.captureStackTrace(err, ClientError)
+
+ // adjust the [[Prototype]]
+ setPrototypeOf(err, ClientError.prototype)
+
+ // redefine the error message
+ Object.defineProperty(err, 'message', {
+ enumerable: true,
+ configurable: true,
+ value: msg,
+ writable: true
+ })
+
+ // redefine the error name
+ Object.defineProperty(err, 'name', {
+ enumerable: false,
+ configurable: true,
+ value: className,
+ writable: true
+ })
+
+ return err
+ }
+
+ inherits(ClientError, HttpError)
+
+ ClientError.prototype.status = code
+ ClientError.prototype.statusCode = code
+ ClientError.prototype.expose = true
+
+ return ClientError
+}
+
+/**
+ * Create a constructor for a server error.
+ * @private
+ */
+
+function createServerErrorConstructor (HttpError, name, code) {
+ var className = name.match(/Error$/) ? name : name + 'Error'
+
+ function ServerError (message) {
+ // create the error object
+ var msg = message != null ? message : statuses[code]
+ var err = new Error(msg)
+
+ // capture a stack trace to the construction point
+ Error.captureStackTrace(err, ServerError)
+
+ // adjust the [[Prototype]]
+ setPrototypeOf(err, ServerError.prototype)
+
+ // redefine the error message
+ Object.defineProperty(err, 'message', {
+ enumerable: true,
+ configurable: true,
+ value: msg,
+ writable: true
+ })
+
+ // redefine the error name
+ Object.defineProperty(err, 'name', {
+ enumerable: false,
+ configurable: true,
+ value: className,
+ writable: true
+ })
+
+ return err
+ }
+
+ inherits(ServerError, HttpError)
+
+ ServerError.prototype.status = code
+ ServerError.prototype.statusCode = code
+ ServerError.prototype.expose = false
+
+ return ServerError
+}
+
+/**
+ * Populate the exports object with constructors for every error class.
+ * @private
+ */
+
+function populateConstructorExports (exports, codes, HttpError) {
+ codes.forEach(function forEachCode (code) {
+ var CodeError
+ var name = toIdentifier(statuses[code])
+
+ switch (codeClass(code)) {
+ case 400:
+ CodeError = createClientErrorConstructor(HttpError, name, code)
+ break
+ case 500:
+ CodeError = createServerErrorConstructor(HttpError, name, code)
+ break
+ }
+
+ if (CodeError) {
+ // export the constructor
+ exports[code] = CodeError
+ exports[name] = CodeError
+ }
+ })
+
+ // backwards-compatibility
+ exports["I'mateapot"] = deprecate.function(exports.ImATeapot,
+ '"I\'mateapot"; use "ImATeapot" instead')
+}
+
+/**
+ * Convert a string of words to a JavaScript identifier.
+ * @private
+ */
+
+function toIdentifier (str) {
+ return str.split(' ').map(function (token) {
+ return token.slice(0, 1).toUpperCase() + token.slice(1)
+ }).join('').replace(/[^ _0-9a-z]/gi, '')
+}
projects / josuexyz / .git / blobdiff