2013-09-19 06:50:06 +04:00
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/*jslint regexp: true */
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2014-02-05 12:40:30 +04:00
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var _ = require('lodash'),
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2013-12-09 04:49:02 +04:00
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colors = require('colors'),
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2014-01-05 10:40:53 +04:00
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config = require('./config'),
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2013-12-09 04:49:02 +04:00
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path = require('path'),
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2014-01-03 19:50:03 +04:00
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when = require('when'),
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2014-01-23 21:52:18 +04:00
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hbs = require('express-hbs'),
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2013-09-17 14:56:05 +04:00
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errors,
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// Paths for views
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2014-01-05 10:40:53 +04:00
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defaultErrorTemplatePath = path.resolve(config().paths.adminViews, 'user-error.hbs'),
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2014-03-05 07:22:00 +04:00
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userErrorTemplateExists = false;
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2013-06-25 15:43:15 +04:00
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2014-02-27 06:44:09 +04:00
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// This is not useful but required for jshint
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colors.setTheme({silly: 'rainbow'});
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2013-06-25 15:43:15 +04:00
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/**
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* Basic error handling helpers
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*/
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errors = {
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2014-03-27 00:43:16 +04:00
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updateActiveTheme: function (activeTheme) {
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userErrorTemplateExists = config().paths.availableThemes[activeTheme].hasOwnProperty('error.hbs');
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2013-10-21 20:59:37 +04:00
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},
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2013-06-25 15:43:15 +04:00
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throwError: function (err) {
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if (!err) {
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err = new Error("An error occurred");
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}
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2013-05-26 22:51:58 +04:00
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2013-06-25 15:43:15 +04:00
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if (_.isString(err)) {
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throw new Error(err);
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}
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2013-05-26 22:51:58 +04:00
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2013-06-25 15:43:15 +04:00
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throw err;
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},
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2013-05-26 22:51:58 +04:00
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2014-01-03 19:50:03 +04:00
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// ## Reject Error
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// Used to pass through promise errors when we want to handle them at a later time
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rejectError: function (err) {
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return when.reject(err);
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},
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2013-10-18 01:49:14 +04:00
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logWarn: function (warn, context, help) {
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if ((process.env.NODE_ENV === 'development' ||
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process.env.NODE_ENV === 'staging' ||
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process.env.NODE_ENV === 'production')) {
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2014-03-22 02:31:58 +04:00
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var msgs = ['\nWarning:'.yellow, warn.yellow, '\n'];
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2013-10-18 01:49:14 +04:00
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if (context) {
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2014-03-22 02:31:58 +04:00
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msgs.push(context.white, '\n');
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2013-10-18 01:49:14 +04:00
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}
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if (help) {
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2014-03-22 02:31:58 +04:00
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msgs.push(help.green);
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2013-10-18 01:49:14 +04:00
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}
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// add a new line
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2014-03-22 02:31:58 +04:00
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msgs.push('\n');
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console.log.apply(console, msgs);
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2013-10-18 01:49:14 +04:00
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}
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},
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2013-09-15 15:11:47 +04:00
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logError: function (err, context, help) {
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2014-03-22 02:31:58 +04:00
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var stack = err ? err.stack : null,
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msgs;
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2014-01-04 00:07:08 +04:00
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if (err) {
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err = err.message || err || 'An unknown error occurred.';
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} else {
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err = 'An unknown error occurred.';
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}
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2013-06-25 15:43:15 +04:00
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// TODO: Logging framework hookup
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2013-09-17 14:56:05 +04:00
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// Eventually we'll have better logging which will know about envs
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2013-09-19 06:50:06 +04:00
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if ((process.env.NODE_ENV === 'development' ||
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process.env.NODE_ENV === 'staging' ||
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process.env.NODE_ENV === 'production')) {
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2013-09-15 15:11:47 +04:00
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2014-03-22 02:31:58 +04:00
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msgs = ['\nERROR:'.red, err.red, '\n'];
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2013-09-15 15:11:47 +04:00
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if (context) {
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2014-03-22 02:31:58 +04:00
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msgs.push(context.white, '\n');
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2013-09-15 15:11:47 +04:00
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}
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if (help) {
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2014-03-22 02:31:58 +04:00
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msgs.push(help.green);
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2013-09-15 15:11:47 +04:00
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}
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2013-09-19 06:50:06 +04:00
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2013-09-15 15:11:47 +04:00
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// add a new line
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2014-03-22 02:31:58 +04:00
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msgs.push('\n');
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2013-09-19 06:50:06 +04:00
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if (stack) {
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2014-03-22 02:31:58 +04:00
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msgs.push(stack, '\n');
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2013-09-19 06:50:06 +04:00
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}
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2014-03-22 02:31:58 +04:00
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console.error.apply(console, msgs);
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2013-07-16 22:57:19 +04:00
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}
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2013-06-25 15:43:15 +04:00
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},
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2013-05-26 22:51:58 +04:00
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2013-09-15 15:11:47 +04:00
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logErrorAndExit: function (err, context, help) {
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this.logError(err, context, help);
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// Exit with 0 to prevent npm errors as we have our own
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process.exit(0);
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2013-06-25 15:43:15 +04:00
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},
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2013-05-26 22:51:58 +04:00
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2013-09-15 15:11:47 +04:00
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logAndThrowError: function (err, context, help) {
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this.logError(err, context, help);
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2013-05-26 22:51:58 +04:00
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2013-09-15 15:11:47 +04:00
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this.throwError(err, context, help);
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2013-06-25 15:43:15 +04:00
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},
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2013-05-26 22:51:58 +04:00
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2013-09-15 15:11:47 +04:00
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logErrorWithRedirect: function (msg, context, help, redirectTo, req, res) {
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2014-02-27 06:44:09 +04:00
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/*jshint unused:false*/
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2013-06-25 15:43:15 +04:00
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var self = this;
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2013-05-26 22:51:58 +04:00
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2013-06-25 15:43:15 +04:00
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return function () {
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2013-09-15 15:11:47 +04:00
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self.logError(msg, context, help);
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2013-05-26 22:51:58 +04:00
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2013-06-25 15:43:15 +04:00
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if (_.isFunction(res.redirect)) {
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res.redirect(redirectTo);
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}
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};
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2013-09-17 14:56:05 +04:00
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},
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renderErrorPage: function (code, err, req, res, next) {
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2014-02-27 06:44:09 +04:00
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/*jshint unused:false*/
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2013-09-19 06:50:06 +04:00
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2014-01-23 21:52:18 +04:00
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var self = this;
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2013-09-19 06:50:06 +04:00
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function parseStack(stack) {
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2013-10-25 23:31:53 +04:00
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if (!_.isString(stack)) {
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2013-09-19 06:50:06 +04:00
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return stack;
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}
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// TODO: split out line numbers
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var stackRegex = /\s*at\s*(\w+)?\s*\(([^\)]+)\)\s*/i;
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return (
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stack
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.split(/[\r\n]+/)
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.slice(1)
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.map(function (line) {
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var parts = line.match(stackRegex);
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if (!parts) {
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return null;
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}
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return {
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2013-09-24 14:46:30 +04:00
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'function': parts[1],
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'at': parts[2]
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2013-09-19 06:50:06 +04:00
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};
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})
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.filter(function (line) {
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return !!line;
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})
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);
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}
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2013-09-17 14:56:05 +04:00
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// Render the error!
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2013-09-18 09:12:53 +04:00
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function renderErrorInt(errorView) {
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2013-09-19 06:50:06 +04:00
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var stack = null;
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2013-09-24 14:46:30 +04:00
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if (process.env.NODE_ENV !== 'production' && err.stack) {
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2013-09-19 06:50:06 +04:00
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stack = parseStack(err.stack);
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}
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2013-10-17 23:42:15 +04:00
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res.status(code).render((errorView || 'error'), {
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2013-09-17 14:56:05 +04:00
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message: err.message || err,
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2013-09-19 06:50:06 +04:00
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code: code,
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stack: stack
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2014-01-23 21:52:18 +04:00
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}, function (templateErr, html) {
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if (!templateErr) {
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return res.send(code, html);
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}
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// There was an error trying to render the error page, output the error
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self.logError(templateErr, 'Error whilst rendering error page', 'Error template has an error');
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// And then try to explain things to the user...
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// Cheat and output the error using handlebars escapeExpression
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return res.send(500, "<h1>Oops, seems there is an an error in the error template.</h1>"
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+ "<p>Encountered the error: </p>"
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+ "<pre>" + hbs.handlebars.Utils.escapeExpression(templateErr.message || templateErr) + "</pre>"
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+ "<br ><p>whilst trying to render an error page for the error: </p>"
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+ code + " " + "<pre>" + hbs.handlebars.Utils.escapeExpression(err.message || err) + "</pre>"
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);
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2013-09-17 14:56:05 +04:00
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});
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}
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if (code >= 500) {
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2014-01-23 21:52:18 +04:00
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this.logError(err, "Rendering Error Page", "Ghost caught a processing error in the middleware layer.");
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2013-09-17 14:56:05 +04:00
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}
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// Are we admin? If so, don't worry about the user template
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2013-10-18 01:49:14 +04:00
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if ((res.isAdmin && req.session.user) || userErrorTemplateExists === true) {
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2013-09-17 14:56:05 +04:00
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return renderErrorInt();
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}
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2013-09-18 09:12:53 +04:00
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// We're not admin and the template doesn't exist. Render the default.
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2014-01-03 00:57:37 +04:00
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return renderErrorInt(defaultErrorTemplatePath);
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2013-09-17 14:56:05 +04:00
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},
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2013-10-18 01:49:14 +04:00
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error404: function (req, res, next) {
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var message = res.isAdmin && req.session.user ? "No Ghost Found" : "Page Not Found";
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2014-03-05 07:22:00 +04:00
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// do not cache 404 error
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res.set({'Cache-Control': 'no-cache, private, no-store, must-revalidate, max-stale=0, post-check=0, pre-check=0'});
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2013-10-18 01:49:14 +04:00
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if (req.method === 'GET') {
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this.renderErrorPage(404, message, req, res, next);
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} else {
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res.send(404, message);
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}
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2013-09-19 06:50:06 +04:00
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},
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2013-10-18 01:49:14 +04:00
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error500: function (err, req, res, next) {
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2013-12-31 03:13:25 +04:00
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// 500 errors should never be cached
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res.set({'Cache-Control': 'no-cache, private, no-store, must-revalidate, max-stale=0, post-check=0, pre-check=0'});
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if (err.status === 404) {
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return this.error404(req, res, next);
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}
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2013-10-18 01:49:14 +04:00
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if (req.method === 'GET') {
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if (!err || !(err instanceof Error)) {
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next();
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}
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2013-11-15 18:27:06 +04:00
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errors.renderErrorPage(err.status || 500, err, req, res, next);
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2013-10-18 01:49:14 +04:00
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} else {
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2013-10-21 09:53:26 +04:00
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res.send(err.status || 500, err);
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2013-09-19 06:50:06 +04:00
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}
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2013-06-25 15:43:15 +04:00
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}
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};
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2013-05-26 22:51:58 +04:00
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2014-02-05 12:40:30 +04:00
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// Ensure our 'this' context for methods and preserve method arity by
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// using Function#bind for expressjs
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_.each([
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2013-09-24 14:46:30 +04:00
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'logAndThrowError',
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'logErrorWithRedirect',
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'renderErrorPage',
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2013-10-18 01:49:14 +04:00
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'error404',
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'error500'
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2014-02-05 12:40:30 +04:00
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], function (funcName) {
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errors[funcName] = errors[funcName].bind(errors);
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});
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2013-05-26 22:51:58 +04:00
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2013-10-17 23:42:15 +04:00
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module.exports = errors;
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