807dd273fd
the reminder not showing content on the card at dashboard view and the quizes are hardcoded must move to the db make api's for it
342 lines
6.6 KiB
JavaScript
342 lines
6.6 KiB
JavaScript
/*!
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* finalhandler
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* Copyright(c) 2014-2022 Douglas Christopher Wilson
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* MIT Licensed
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*/
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'use strict'
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/**
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* Module dependencies.
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* @private
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*/
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var debug = require('debug')('finalhandler')
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var encodeUrl = require('encodeurl')
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var escapeHtml = require('escape-html')
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var onFinished = require('on-finished')
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var parseUrl = require('parseurl')
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var statuses = require('statuses')
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var unpipe = require('unpipe')
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/**
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* Module variables.
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* @private
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*/
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var DOUBLE_SPACE_REGEXP = /\x20{2}/g
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var NEWLINE_REGEXP = /\n/g
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/* istanbul ignore next */
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var defer = typeof setImmediate === 'function'
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? setImmediate
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: function (fn) { process.nextTick(fn.bind.apply(fn, arguments)) }
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var isFinished = onFinished.isFinished
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/**
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* Create a minimal HTML document.
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*
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* @param {string} message
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* @private
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*/
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function createHtmlDocument (message) {
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var body = escapeHtml(message)
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.replace(NEWLINE_REGEXP, '<br>')
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.replace(DOUBLE_SPACE_REGEXP, ' ')
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return '<!DOCTYPE html>\n' +
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'<html lang="en">\n' +
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'<head>\n' +
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'<meta charset="utf-8">\n' +
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'<title>Error</title>\n' +
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'</head>\n' +
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'<body>\n' +
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'<pre>' + body + '</pre>\n' +
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'</body>\n' +
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'</html>\n'
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}
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/**
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* Module exports.
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* @public
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*/
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module.exports = finalhandler
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/**
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* Create a function to handle the final response.
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*
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* @param {Request} req
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* @param {Response} res
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* @param {Object} [options]
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* @return {Function}
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* @public
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*/
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function finalhandler (req, res, options) {
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var opts = options || {}
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// get environment
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var env = opts.env || process.env.NODE_ENV || 'development'
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// get error callback
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var onerror = opts.onerror
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return function (err) {
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var headers
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var msg
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var status
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// ignore 404 on in-flight response
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if (!err && headersSent(res)) {
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debug('cannot 404 after headers sent')
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return
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}
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// unhandled error
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if (err) {
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// respect status code from error
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status = getErrorStatusCode(err)
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if (status === undefined) {
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// fallback to status code on response
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status = getResponseStatusCode(res)
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} else {
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// respect headers from error
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headers = getErrorHeaders(err)
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}
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// get error message
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msg = getErrorMessage(err, status, env)
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} else {
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// not found
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status = 404
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msg = 'Cannot ' + req.method + ' ' + encodeUrl(getResourceName(req))
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}
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debug('default %s', status)
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// schedule onerror callback
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if (err && onerror) {
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defer(onerror, err, req, res)
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}
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// cannot actually respond
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if (headersSent(res)) {
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debug('cannot %d after headers sent', status)
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if (req.socket) {
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req.socket.destroy()
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}
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return
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}
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// send response
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send(req, res, status, headers, msg)
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}
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}
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/**
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* Get headers from Error object.
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*
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* @param {Error} err
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* @return {object}
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* @private
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*/
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function getErrorHeaders (err) {
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if (!err.headers || typeof err.headers !== 'object') {
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return undefined
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}
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var headers = Object.create(null)
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var keys = Object.keys(err.headers)
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for (var i = 0; i < keys.length; i++) {
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var key = keys[i]
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headers[key] = err.headers[key]
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}
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return headers
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}
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/**
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* Get message from Error object, fallback to status message.
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*
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* @param {Error} err
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* @param {number} status
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* @param {string} env
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* @return {string}
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* @private
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*/
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function getErrorMessage (err, status, env) {
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var msg
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if (env !== 'production') {
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// use err.stack, which typically includes err.message
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msg = err.stack
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// fallback to err.toString() when possible
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if (!msg && typeof err.toString === 'function') {
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msg = err.toString()
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}
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}
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return msg || statuses.message[status]
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}
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/**
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* Get status code from Error object.
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*
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* @param {Error} err
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* @return {number}
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* @private
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*/
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function getErrorStatusCode (err) {
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// check err.status
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if (typeof err.status === 'number' && err.status >= 400 && err.status < 600) {
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return err.status
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}
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// check err.statusCode
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if (typeof err.statusCode === 'number' && err.statusCode >= 400 && err.statusCode < 600) {
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return err.statusCode
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}
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return undefined
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}
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/**
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* Get resource name for the request.
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*
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* This is typically just the original pathname of the request
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* but will fallback to "resource" is that cannot be determined.
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*
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* @param {IncomingMessage} req
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* @return {string}
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* @private
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*/
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function getResourceName (req) {
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try {
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return parseUrl.original(req).pathname
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} catch (e) {
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return 'resource'
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}
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}
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/**
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* Get status code from response.
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*
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* @param {OutgoingMessage} res
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* @return {number}
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* @private
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*/
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function getResponseStatusCode (res) {
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var status = res.statusCode
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// default status code to 500 if outside valid range
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if (typeof status !== 'number' || status < 400 || status > 599) {
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status = 500
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}
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return status
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}
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/**
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* Determine if the response headers have been sent.
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*
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* @param {object} res
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* @returns {boolean}
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* @private
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*/
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function headersSent (res) {
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return typeof res.headersSent !== 'boolean'
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? Boolean(res._header)
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: res.headersSent
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}
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/**
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* Send response.
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*
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* @param {IncomingMessage} req
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* @param {OutgoingMessage} res
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* @param {number} status
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* @param {object} headers
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* @param {string} message
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* @private
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*/
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function send (req, res, status, headers, message) {
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function write () {
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// response body
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var body = createHtmlDocument(message)
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// response status
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res.statusCode = status
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if (req.httpVersionMajor < 2) {
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res.statusMessage = statuses.message[status]
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}
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// remove any content headers
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res.removeHeader('Content-Encoding')
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res.removeHeader('Content-Language')
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res.removeHeader('Content-Range')
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// response headers
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setHeaders(res, headers)
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// security headers
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res.setHeader('Content-Security-Policy', "default-src 'none'")
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res.setHeader('X-Content-Type-Options', 'nosniff')
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// standard headers
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res.setHeader('Content-Type', 'text/html; charset=utf-8')
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res.setHeader('Content-Length', Buffer.byteLength(body, 'utf8'))
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if (req.method === 'HEAD') {
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res.end()
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return
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}
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res.end(body, 'utf8')
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}
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if (isFinished(req)) {
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write()
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return
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}
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// unpipe everything from the request
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unpipe(req)
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// flush the request
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onFinished(req, write)
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req.resume()
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}
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/**
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* Set response headers from an object.
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*
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* @param {OutgoingMessage} res
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* @param {object} headers
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* @private
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*/
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function setHeaders (res, headers) {
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if (!headers) {
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return
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}
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var keys = Object.keys(headers)
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for (var i = 0; i < keys.length; i++) {
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var key = keys[i]
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res.setHeader(key, headers[key])
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}
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}
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