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Diffstat (limited to 'node_modules/finalhandler/index.js')
-rw-r--r-- | node_modules/finalhandler/index.js | 331 |
1 files changed, 0 insertions, 331 deletions
diff --git a/node_modules/finalhandler/index.js b/node_modules/finalhandler/index.js deleted file mode 100644 index f20ffe3..0000000 --- a/node_modules/finalhandler/index.js +++ /dev/null @@ -1,331 +0,0 @@ -/*! - * finalhandler - * Copyright(c) 2014-2017 Douglas Christopher Wilson - * MIT Licensed - */ - -'use strict' - -/** - * Module dependencies. - * @private - */ - -var debug = require('debug')('finalhandler') -var encodeUrl = require('encodeurl') -var escapeHtml = require('escape-html') -var onFinished = require('on-finished') -var parseUrl = require('parseurl') -var statuses = require('statuses') -var unpipe = require('unpipe') - -/** - * Module variables. - * @private - */ - -var DOUBLE_SPACE_REGEXP = /\x20{2}/g -var NEWLINE_REGEXP = /\n/g - -/* istanbul ignore next */ -var defer = typeof setImmediate === 'function' - ? setImmediate - : function (fn) { process.nextTick(fn.bind.apply(fn, arguments)) } -var isFinished = onFinished.isFinished - -/** - * Create a minimal HTML document. - * - * @param {string} message - * @private - */ - -function createHtmlDocument (message) { - var body = escapeHtml(message) - .replace(NEWLINE_REGEXP, '<br>') - .replace(DOUBLE_SPACE_REGEXP, ' ') - - return '<!DOCTYPE html>\n' + - '<html lang="en">\n' + - '<head>\n' + - '<meta charset="utf-8">\n' + - '<title>Error</title>\n' + - '</head>\n' + - '<body>\n' + - '<pre>' + body + '</pre>\n' + - '</body>\n' + - '</html>\n' -} - -/** - * Module exports. - * @public - */ - -module.exports = finalhandler - -/** - * Create a function to handle the final response. - * - * @param {Request} req - * @param {Response} res - * @param {Object} [options] - * @return {Function} - * @public - */ - -function finalhandler (req, res, options) { - var opts = options || {} - - // get environment - var env = opts.env || process.env.NODE_ENV || 'development' - - // get error callback - var onerror = opts.onerror - - return function (err) { - var headers - var msg - var status - - // ignore 404 on in-flight response - if (!err && headersSent(res)) { - debug('cannot 404 after headers sent') - return - } - - // unhandled error - if (err) { - // respect status code from error - status = getErrorStatusCode(err) - - if (status === undefined) { - // fallback to status code on response - status = getResponseStatusCode(res) - } else { - // respect headers from error - headers = getErrorHeaders(err) - } - - // get error message - msg = getErrorMessage(err, status, env) - } else { - // not found - status = 404 - msg = 'Cannot ' + req.method + ' ' + encodeUrl(getResourceName(req)) - } - - debug('default %s', status) - - // schedule onerror callback - if (err && onerror) { - defer(onerror, err, req, res) - } - - // cannot actually respond - if (headersSent(res)) { - debug('cannot %d after headers sent', status) - req.socket.destroy() - return - } - - // send response - send(req, res, status, headers, msg) - } -} - -/** - * Get headers from Error object. - * - * @param {Error} err - * @return {object} - * @private - */ - -function getErrorHeaders (err) { - if (!err.headers || typeof err.headers !== 'object') { - return undefined - } - - var headers = Object.create(null) - var keys = Object.keys(err.headers) - - for (var i = 0; i < keys.length; i++) { - var key = keys[i] - headers[key] = err.headers[key] - } - - return headers -} - -/** - * Get message from Error object, fallback to status message. - * - * @param {Error} err - * @param {number} status - * @param {string} env - * @return {string} - * @private - */ - -function getErrorMessage (err, status, env) { - var msg - - if (env !== 'production') { - // use err.stack, which typically includes err.message - msg = err.stack - - // fallback to err.toString() when possible - if (!msg && typeof err.toString === 'function') { - msg = err.toString() - } - } - - return msg || statuses[status] -} - -/** - * Get status code from Error object. - * - * @param {Error} err - * @return {number} - * @private - */ - -function getErrorStatusCode (err) { - // check err.status - if (typeof err.status === 'number' && err.status >= 400 && err.status < 600) { - return err.status - } - - // check err.statusCode - if (typeof err.statusCode === 'number' && err.statusCode >= 400 && err.statusCode < 600) { - return err.statusCode - } - - return undefined -} - -/** - * Get resource name for the request. - * - * This is typically just the original pathname of the request - * but will fallback to "resource" is that cannot be determined. - * - * @param {IncomingMessage} req - * @return {string} - * @private - */ - -function getResourceName (req) { - try { - return parseUrl.original(req).pathname - } catch (e) { - return 'resource' - } -} - -/** - * Get status code from response. - * - * @param {OutgoingMessage} res - * @return {number} - * @private - */ - -function getResponseStatusCode (res) { - var status = res.statusCode - - // default status code to 500 if outside valid range - if (typeof status !== 'number' || status < 400 || status > 599) { - status = 500 - } - - return status -} - -/** - * Determine if the response headers have been sent. - * - * @param {object} res - * @returns {boolean} - * @private - */ - -function headersSent (res) { - return typeof res.headersSent !== 'boolean' - ? Boolean(res._header) - : res.headersSent -} - -/** - * Send response. - * - * @param {IncomingMessage} req - * @param {OutgoingMessage} res - * @param {number} status - * @param {object} headers - * @param {string} message - * @private - */ - -function send (req, res, status, headers, message) { - function write () { - // response body - var body = createHtmlDocument(message) - - // response status - res.statusCode = status - res.statusMessage = statuses[status] - - // response headers - setHeaders(res, headers) - - // security headers - res.setHeader('Content-Security-Policy', "default-src 'self'") - res.setHeader('X-Content-Type-Options', 'nosniff') - - // standard headers - res.setHeader('Content-Type', 'text/html; charset=utf-8') - res.setHeader('Content-Length', Buffer.byteLength(body, 'utf8')) - - if (req.method === 'HEAD') { - res.end() - return - } - - res.end(body, 'utf8') - } - - if (isFinished(req)) { - write() - return - } - - // unpipe everything from the request - unpipe(req) - - // flush the request - onFinished(req, write) - req.resume() -} - -/** - * Set response headers from an object. - * - * @param {OutgoingMessage} res - * @param {object} headers - * @private - */ - -function setHeaders (res, headers) { - if (!headers) { - return - } - - var keys = Object.keys(headers) - for (var i = 0; i < keys.length; i++) { - var key = keys[i] - res.setHeader(key, headers[key]) - } -} |