node-dnserrors

Exposes a function mapping DNS errors to DnsError objects.

The defined DnsError objects are created via createerror.

Installation

Make sure you have node.js and npm installed, then run:

npm install dnserrors

Usage

The primary use case is wrapping errors originating from dns operations:

var dns = require('dns');
var dnsErrors = require('dnserrors');

dns.lookup('qovwiejiqvwiejvoqwevqwev.com', function (err) {
    var dnsError = dnsErrors(err);

    console.warn(dnsError.toString()); // ENOTFOUND: getaddrinfo ENOTFOUND
});

Other errors will be marked as not being dns errors:

var dnsErrors = require('dnserrors');

var err = new Error();
var dnsError = dnsErrors(err);

if (dnsError.NotDnsError) {
    // what am I?
}

Mappings

The following is a list of dns errors mapped by this module:

• ENODATA (mapped to 404)
• EFORMERR (mapped to 400)
• ESERVFAIL (mapped to 502)
• ENOTFOUND (mapped to 404)
• ENOENT (mapped to 404)
• ENOTIMP (mapped to 501)
• EREFUSED (mapped to 403)
• EBADQUERY (mapped to 400)
• EBADNAME (mapped to 400)
• EBADFAMILY (mapped to 400)
• EBADRESP (mapped to 502)
• ECONNREFUSED (mapped to 502)
• ETIMEOUT (mapped to 504)
• EEOF (mapped to 500)
• EFILE (mapped to 500)
• ENOMEM (mapped to 500)
• EDESTRUCTION (mapped to 500)
• EBADSTR (mapped to 400)
• EBADFLAGS (mapped to 400)
• ENONAME (mapped to 400)
• EBADHINTS (mapped to 400)
• ENOTINITIALIZED (mapped to 500)
• ELOADIPHLPAPI (mapped to 500)
• EADDRGETNETWORKPARAMS (mapped to 500)
• ECANCELLED (mapped to 500)

License

3-clause BSD license -- see the LICENSE file for details.