therror-express implements a connect/express error handler middleware for Therror.ServerError
Logs all errors (by default) and replies with an error payload with only the error relevant information. Currently supports content negotiation for text/html, text/plain and application/json.
It's written in ES6, for node >= 4
npm install --save therror-connectconst errorHandler = require('therror-connect');
const connect = require('connect');
let app = connect();
// The last one middleware added to your app
app.use(errorHandler()); // Some options can be provided. See belowconst express = require('express');
const app = express();
app.set('views', path.join(__dirname, 'views'));
app.set('view engine', 'ejs');
app.use(errorHandler({
render: function(data, req, res, cb) {
res.render(`/errors/${data.statusCode}`, data, cb);
}
}));let errorHandler = require('therror-connect');errorHandler(options)
Creates the middleware configured with the provided options object
options.log [Boolean] can be
true: logs the error using theerror.log({req, res})method. defaultfalse: does nothing.
options.development [Boolean] can be
false: Dont add stack traces and development info to the payload. defaulttrue: Add development info to the responses.
options.unexpectedClass [class] The Therror.ServerError class to instantiate when an unmanegeable error reaches the middleware. defaults to Therror.ServerError.InternalServerError
options.render Function to customize the sent html sent.
function render(data, req, res, cb) {
// data.error: the error instance.
// data.name: error name. Eg: UnauthorizedError
// data.message: error message. Eg: User 12 not authorized
// data.statusCode: associated statusCode to the message. Eg: 401
// data.stack: looong string with the stacktrace (if options.development === true; else '')
// req: Incoming http request
// res: Outgoing http response. Warning! don't send the html, give it to the callback
// cb: function(err, html) callback to call with the html
}Copyright 2016,2017 Telefónica I+D
Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with the License. You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the specific language governing permissions and limitations under the License.