diff options
Diffstat (limited to 'node_modules/http-errors/index.js')
| -rw-r--r-- | node_modules/http-errors/index.js | 260 |
1 files changed, 260 insertions, 0 deletions
diff --git a/node_modules/http-errors/index.js b/node_modules/http-errors/index.js new file mode 100644 index 0000000..9509303 --- /dev/null +++ b/node_modules/http-errors/index.js @@ -0,0 +1,260 @@ +/*! + * 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, '') +} |