How to specify HTTP error code

Question

I have tried   app get      function req  res  next        var e   new Error  error message        e status   400      next e         and   app get      function req  res  next        res statusCode   400      var e   new Error  error message        next e         but always an error code of 500 is announced

User · Answer

You can use res send  OMG      404   just res send 404

User · Answer

I tried   res status 400   res send  message        but it was giving me error       node 208  UnhandledPromiseRejectionWarning  Error  Can t set headers   after they  are sent    This work for me  res status 400  send yourMessage

User · Answer

I d like to centralize the creation of the error response in this way   app get   test   function req  res     throw  status  500  message   detailed message         app use function  err  req  res  next      res status err status    500  json  status  err status  message  err message         So I have always the same error output format   PS  of course you could create an object to extend the standard error like this   const AppError   require    lib app-error    app get   test   function req  res     throw new AppError  Detail Message   500           use strict    module exports   function AppError message  httpStatus      Error captureStackTrace this  this constructor     this name   this constructor name    this message   message    this status   httpStatus      require  util   inherits module exports  Error

User · Answer

In express 4 0 they got it right     res sendStatus statusCode     Sets the response HTTP status code to statusCode and send its string representation as the response body   res sendStatus 200      equivalent to res status 200  send  OK   res sendStatus 403      equivalent to res status 403  send  Forbidden   res sendStatus 404      equivalent to res status 404  send  Not Found   res sendStatus 500      equivalent to res status 500  send  Internal Server Error      If an unsupported status code is specified  the HTTP status is still set to statusCode and the string version of the code is sent as the response body   res sendStatus 2000      equivalent to res status 2000  send  2000

User · Answer

From what I saw in Express 4 0 this works for me  This is example of authentication required middleware   function apiDemandLoggedIn req  res  next            if user is authenticated in the session  carry on     console log  isAuth   req isAuthenticated    req user       if  req isAuthenticated            return next            If not return 401 response which means unauthroized      var err   new Error        err status   401      next err

User · Answer

Old question  but still coming up on Google  In the current version of Express  3 4 0   you can alter res statusCode before calling next err    res statusCode   404  next new Error  File not found

User · Answer

Express deprecated res send body  status   Use res status status  send body  instead

User · Answer

I would recommend handling the sending of http error codes by using the Boom package

User · Answer

Per the Express  Version 4   docs  you can use   res status 400   res send  None shall pass      http   expressjs com 4x api html res status   lt  3 8  res statusCode   401  res send  None shall pass

User · Answer

The version of the errorHandler middleware bundled with some  perhaps older   versions of express seems to have the status code hardcoded  The version documented here  http   www senchalabs org connect errorHandler html on the other hand lets you do what you are trying to do  So  perhaps trying upgrading to the latest version of express connect

User · Answer

A simple one liner    res status 404  send  Oh uh  something went wrong

[node.js] How to specify HTTP error code?

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