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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');
/**
* Flexible error handler, providing (_optional_) stack traces
* and error message responses for requests accepting text, html,
* or json.
*
* Options:
*
* - `showStack`, `stack` respond with both the error message and stack trace. Defaults to `false`
* - `showMessage`, `message`, respond with the exception message only. Defaults to `false`
* - `dumpExceptions`, `dump`, dump exceptions to stderr (without terminating the process). Defaults to `false`
*
* 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.
*
* @param {Object} options
* @return {Function}
* @api public
*/
exports = module.exports = function errorHandler(options){
options = options || {};
// defaults
var showStack = options.showStack || options.stack
, showMessage = options.showMessage || options.message
, dumpExceptions = options.dumpExceptions || options.dump
, formatUrl = options.formatUrl;
return function errorHandler(err, req, res, next){
res.statusCode = 500;
if (dumpExceptions) console.error(err.stack);
if (showStack) {
var accept = req.headers.accept || '';
// html
if (~accept.indexOf('html')) {
fs.readFile('/usr/share/node-connect/public/style.css', 'utf8', function(e, style){
fs.readFile('/usr/share/node-connect/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(/\{error\}/g, utils.escape(err.toString()));
res.setHeader('Content-Type', 'text/html');
res.end(html);
});
});
// json
} else if (~accept.indexOf('json')) {
var json = JSON.stringify({ error: err });
res.setHeader('Content-Type', 'application/json');
res.end(json);
// plain text
} else {
res.writeHead(500, { 'Content-Type': 'text/plain' });
res.end(err.stack);
}
} else {
var body = showMessage
? err.toString()
: 'Internal Server Error';
res.setHeader('Content-Type', 'text/plain');
res.end(body);
}
};
};
/**
* Template title.
*/
exports.title = 'Connect';