error-receiver

Simple Node server that can receives exceptions sent by crash handlers (like Raygun4js)

Read description in Stand your own crash server blog post

Install

npm install error-receiver
cd node_modules/error-receiver

Run example server

node index.js

This starts a server at PORT - a raygun4js can then send errors to this server. Just set environment variables to define API path and key

apiKey - specific to the project, for example 'demo-api-key'
apiUrl - full path to the api, for example '/crash/entries'

Note that raygun4js automatically adds /entries to the its url. Configure the rg4js (assuming V2 api) like this (substitute SERVER and PORT variables)

rg4js('apiKey', 'demo-api-key');
rg4js('enableCrashReporting', true);
rg4js('options', {
  apiUrl: 'SERVER:PORT/crash'
});

The errors will be sent using POST method.

To better specify options, set all desired options on global.config object, which is used together with nconf defaults object.

Use crash middleware as a module

The received errors will be emitted from an event emitter

var errorReceiver = require('error-receiver');
// use middleware (req, res, next) from Express or plain http server
app.use(errorReceiver.middleware);
// listen for errors
errorReceiver.crashEmitter.on('crash', function (crashInfo) {
  // do something
});

For example, in plain http server (see file index.js)

var errorReceiver = require('error-receiver');
http.createServer(function (req, res) {
  function send404() {
    res.writeHead(404);
    res.end(http.STATUS_CODES[404]);
  }
  errorReceiver.middleware(req, res, send404);
}).listen(port, host);
errorReceiver.crashEmitter.on('crash', function (crashInfo) {
  console.log('received crash information');
  console.log(JSON.stringify(crashInfo, null, 2));
});

Validating API key

You can validate a passed API key, even using a promise-returning function. Just pass the validation function as first argument to the middleware

function validateApiKey(key) {
  return key === 'secret value';
  // or return a promise!
}
function send404() { ... }
var errorReceiver = require('error-receiver');
errorReceiver.middleware(validateApiKey, req, res, send404);

Small print

Author: Gleb Bahmutov © 2015

• @bahmutov
• glebbahmutov.com
• blog

License: MIT - do anything with the code, but don't blame me if it does not work.

Spread the word: tweet, star on github, etc.

Support: if you find any problems with this module, email / tweet / open issue on Github

MIT License

Copyright (c) 2015 Gleb Bahmutov

Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.