100 lines
2.8 KiB
JavaScript
100 lines
2.8 KiB
JavaScript
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/*!
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* Connect - errorHandler
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* Copyright(c) 2010 Sencha Inc.
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* Copyright(c) 2011 TJ Holowaychuk
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* MIT Licensed
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*/
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/**
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* Module dependencies.
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*/
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var utils = require('../utils')
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, url = require('url')
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, fs = require('fs');
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/**
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* Flexible error handler, providing (_optional_) stack traces
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* and error message responses for requests accepting text, html,
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* or json.
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*
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* Options:
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*
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* - `showStack`, `stack` respond with both the error message and stack trace. Defaults to `false`
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* - `showMessage`, `message`, respond with the exception message only. Defaults to `false`
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* - `dumpExceptions`, `dump`, dump exceptions to stderr (without terminating the process). Defaults to `false`
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*
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* Text:
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*
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* By default, and when _text/plain_ is accepted a simple stack trace
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* or error message will be returned.
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*
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* JSON:
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*
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* When _application/json_ is accepted, connect will respond with
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* an object in the form of `{ "error": error }`.
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*
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* HTML:
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*
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* When accepted connect will output a nice html stack trace.
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*
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* @param {Object} options
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* @return {Function}
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* @api public
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*/
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exports = module.exports = function errorHandler(options){
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options = options || {};
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// defaults
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var showStack = options.showStack || options.stack
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, showMessage = options.showMessage || options.message
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, dumpExceptions = options.dumpExceptions || options.dump
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, formatUrl = options.formatUrl;
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return function errorHandler(err, req, res, next){
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res.statusCode = 500;
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if (dumpExceptions) console.error(err.stack);
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if (showStack) {
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var accept = req.headers.accept || '';
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// html
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if (~accept.indexOf('html')) {
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fs.readFile(__dirname + '/../public/style.css', 'utf8', function(e, style){
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fs.readFile(__dirname + '/../public/error.html', 'utf8', function(e, html){
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var stack = (err.stack || '')
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.split('\n').slice(1)
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.map(function(v){ return '<li>' + v + '</li>'; }).join('');
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html = html
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.replace('{style}', style)
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.replace('{stack}', stack)
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.replace('{title}', exports.title)
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.replace(/\{error\}/g, utils.escape(err.toString()));
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res.setHeader('Content-Type', 'text/html');
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res.end(html);
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});
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});
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// json
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} else if (~accept.indexOf('json')) {
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var json = JSON.stringify({ error: err });
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res.setHeader('Content-Type', 'application/json');
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res.end(json);
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// plain text
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} else {
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res.writeHead(500, { 'Content-Type': 'text/plain' });
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res.end(err.stack);
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}
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} else {
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var body = showMessage
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? err.toString()
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: 'Internal Server Error';
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res.setHeader('Content-Type', 'text/plain');
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res.end(body);
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}
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};
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};
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/**
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* Template title.
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*/
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exports.title = 'Connect';
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