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/*!
* Connect - errorHandler
* Copyright(c) 2010 Sencha Inc.
* Copyright(c) 2011 TJ Holowaychuk
* MIT Licensed
*/
/**
* Module dependencies.
*/
var utils = require('../utils')
, url = require('url')
, fs = require('fs');
// environment
var env = process.env.NODE_ENV || 'development';
/**
* Error handler:
*
* Development error handler, providing stack traces
* and error message responses for requests accepting text, html,
* or json.
*
* Text:
*
* By default, and when _text/plain_ is accepted a simple stack trace
* or error message will be returned.
*
* JSON:
*
* When _application/json_ is accepted, connect will respond with
* an object in the form of `{ "error": error }`.
*
* HTML:
*
* When accepted connect will output a nice html stack trace.
*
* @return {Function}
* @api public
*/
exports = module.exports = function errorHandler(){
return function errorHandler(err, req, res, next){
if (err.status) res.statusCode = err.status;
if (res.statusCode < 400) res.statusCode = 500;
if ('test' != env) console.error(err.stack);
var accept = req.headers.accept || '';
// html
if (~accept.indexOf('html')) {
fs.readFile(__dirname + '/../public/style.css', 'utf8', function(e, style){
fs.readFile(__dirname + '/../public/error.html', 'utf8', function(e, html){
var stack = (err.stack || '')
.split('\n').slice(1)
.map(function(v){ return '<li>' + v + '</li>'; }).join('');
html = html
.replace('{style}', style)
.replace('{stack}', stack)
.replace('{title}', exports.title)
.replace('{statusCode}', res.statusCode)
.replace(/\{error\}/g, utils.escape(err.toString()));
res.setHeader('Content-Type', 'text/html; charset=utf-8');
res.end(html);
});
});
// json
} else if (~accept.indexOf('json')) {
var error = { message: err.message, stack: err.stack };
for (var prop in err) error[prop] = err[prop];
var json = JSON.stringify({ error: error });
res.setHeader('Content-Type', 'application/json');
res.end(json);
// plain text
} else {
res.writeHead(res.statusCode, { 'Content-Type': 'text/plain' });
res.end(err.stack);
}
};
};
/**
* Template title, framework authors may override this value.
*/
exports.title = 'Connect';
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