72 lines
No EOL
2.2 KiB
JavaScript
72 lines
No EOL
2.2 KiB
JavaScript
const _render = require('./page-renderer');
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const _parseOptions = require('./options');
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const _getResources = require('./resources');
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const _dispatch = require('./dispatcher');
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// wrapper to add custom options
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async function createDispatcher(options={}){
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// merge options
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const opt = _parseOptions(options);
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// load resources
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const resources = await _getResources(opt);
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// multi-type support
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// @see https://github.com/expressjs/express/blob/master/examples/error-pages/index.js
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return function dispatchRequest(page, httpStatusCode, req, res, err){
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// run generic dispatcher
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const {pageData, templateVars} = _dispatch(opt, resources, page, httpStatusCode, err);
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// set http status code
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res.status(httpStatusCode || 500);
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// multiple response formats
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res.format({
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// standard http-error-pages
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html: function(){
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res.type('.html');
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res.send(_render(resources.template, resources.stylesheet, opt.filter(templateVars, req)))
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},
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// json
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json: function(){
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res.json({
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error: `${pageData.title} - ${pageData.message}`
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})
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},
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// text response
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default: function(){
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// plain text
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res.type('.txt').send(`${pageData.title} - ${pageData.message}`);
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}
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})
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}
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}
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module.exports = async function httpErrorPages(router, options={}){
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// create new disptacher with given options
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const dispatch = await createDispatcher(options);
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// default 404 error - no route matches
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router.all('*', function(req, res){
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dispatch('404', 404, req, res, new Error('file not found'));
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});
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// internal errors (all)
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// eslint-disable-next-line no-unused-vars
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router.use(function(err, req, res, next){
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// status code given ?
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if (err.status){
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// custom errorpage set ?
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dispatch(err.errorpage || err.status, err.status, req, res, err);
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// use default http500 page
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}else{
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dispatch('500', 500, req, res, err);
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}
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});
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}; |