59 lines
1.8 KiB
JavaScript
59 lines
1.8 KiB
JavaScript
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// Copyright IBM Corp. 2016. All Rights Reserved.
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// Node module: strong-error-handler
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// This file is licensed under the MIT License.
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// License text available at https://opensource.org/licenses/MIT
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'use strict';
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var buildResponseData = require('./data-builder');
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var debug = require('debug')('strong-error-handler');
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var format = require('util').format;
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var logToConsole = require('./logger');
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var sendJson = require('./send-json');
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function noop() {
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}
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/**
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* Create a middleware error handler function.
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*
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* @param {Object} options
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* @returns {Function}
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*/
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exports = module.exports = function createStrongErrorHandler(options) {
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options = options || {};
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debug('Initializing with options %j', options);
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// Debugging mode is disabled by default. When turned on (in dev),
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// all error properties (including) stack traces are sent in the response
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var isDebugMode = options.debug;
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// Log all errors via console.error (enabled by default)
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var logError = options.log !== false ? logToConsole : noop;
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return function strongErrorHandler(err, req, res, next) {
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debug('Handling %s', err.stack || err);
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logError(req, err);
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if (res._header) {
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debug('Response was already sent, closing the underlying connection');
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return req.socket.destroy();
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}
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var data = buildResponseData(err, isDebugMode);
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debug('Response status %s data %j', data.statusCode, data);
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res.setHeader('X-Content-Type-Options', 'nosniff');
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res.statusCode = data.statusCode;
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// TODO: negotiate the content-type, take into account options.defaultType
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// For now, we always return JSON. See
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// - https://github.com/strongloop/strong-error-handler/issues/4
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// - https://github.com/strongloop/strong-error-handler/issues/5
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// - https://github.com/strongloop/strong-error-handler/issues/6
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sendJson(res, data);
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};
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};
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