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    Create HTTP errors for Express, Koa, Connect, etc. with ease.


    This is a Node.js module available through the npm registry. Installation is done using the npm install command:

    $ npm install http-errors


    var createError = require('http-errors')
    var express = require('express')
    var app = express()
    app.use(function (req, res, next) {
      if (!req.user) return next(createError(401, 'Please login to view this page.'))


    This is the current API, currently extracted from Koa and subject to change.

    All errors inherit from JavaScript Error and the exported createError.HttpError.

    Error Properties

    • expose - can be used to signal if message should be sent to the client, defaulting to false when status >= 500
    • headers - can be an object of header names to values to be sent to the client, defaulting to undefined. When defined, the key names should all be lower-cased
    • message - the traditional error message, which should be kept short and all single line
    • status - the status code of the error, mirroring statusCode for general compatibility
    • statusCode - the status code of the error, defaulting to 500

    createError([status], [message], [properties])

    var err = createError(404, 'This video does not exist!')
    • status: 500 - the status code as a number
    • message - the message of the error, defaulting to node's text for that status code.
    • properties - custom properties to attach to the object

    new createError[code || name]([msg]))

    var err = new createError.NotFound()
    • code - the status code as a number
    • name - the name of the error as a "bumpy case", i.e. NotFound or InternalServerError.

    List of all constructors

    Status Code Constructor Name
    400 BadRequest
    401 Unauthorized
    402 PaymentRequired
    403 Forbidden
    404 NotFound
    405 MethodNotAllowed
    406 NotAcceptable
    407 ProxyAuthenticationRequired
    408 RequestTimeout
    409 Conflict
    410 Gone
    411 LengthRequired
    412 PreconditionFailed
    413 PayloadTooLarge
    414 URITooLong
    415 UnsupportedMediaType
    416 RangeNotSatisfiable
    417 ExpectationFailed
    418 ImATeapot
    421 MisdirectedRequest
    422 UnprocessableEntity
    423 Locked
    424 FailedDependency
    425 UnorderedCollection
    426 UpgradeRequired
    428 PreconditionRequired
    429 TooManyRequests
    431 RequestHeaderFieldsTooLarge
    451 UnavailableForLegalReasons
    500 InternalServerError
    501 NotImplemented
    502 BadGateway
    503 ServiceUnavailable
    504 GatewayTimeout
    505 HTTPVersionNotSupported
    506 VariantAlsoNegotiates
    507 InsufficientStorage
    508 LoopDetected
    509 BandwidthLimitExceeded
    510 NotExtended
    511 NetworkAuthenticationRequired





    npm i http-errors

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