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opusdev/vector-similarity-api

sourceHugging Faceupdated 5mo agoView on Hugging Face
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index.js210 linesDownload Raw Back to serve-static
1/*!2 * serve-static3 * Copyright(c) 2010 Sencha Inc.4 * Copyright(c) 2011 TJ Holowaychuk5 * Copyright(c) 2014-2016 Douglas Christopher Wilson6 * MIT Licensed7 */8 9'use strict'10 11/**12 * Module dependencies.13 * @private14 */15 16var encodeUrl = require('encodeurl')17var escapeHtml = require('escape-html')18var parseUrl = require('parseurl')19var resolve = require('path').resolve20var send = require('send')21var url = require('url')22 23/**24 * Module exports.25 * @public26 */27 28module.exports = serveStatic29module.exports.mime = send.mime30 31/**32 * @param {string} root33 * @param {object} [options]34 * @return {function}35 * @public36 */37 38function serveStatic (root, options) {39  if (!root) {40    throw new TypeError('root path required')41  }42 43  if (typeof root !== 'string') {44    throw new TypeError('root path must be a string')45  }46 47  // copy options object48  var opts = Object.create(options || null)49 50  // fall-though51  var fallthrough = opts.fallthrough !== false52 53  // default redirect54  var redirect = opts.redirect !== false55 56  // headers listener57  var setHeaders = opts.setHeaders58 59  if (setHeaders && typeof setHeaders !== 'function') {60    throw new TypeError('option setHeaders must be function')61  }62 63  // setup options for send64  opts.maxage = opts.maxage || opts.maxAge || 065  opts.root = resolve(root)66 67  // construct directory listener68  var onDirectory = redirect69    ? createRedirectDirectoryListener()70    : createNotFoundDirectoryListener()71 72  return function serveStatic (req, res, next) {73    if (req.method !== 'GET' && req.method !== 'HEAD') {74      if (fallthrough) {75        return next()76      }77 78      // method not allowed79      res.statusCode = 40580      res.setHeader('Allow', 'GET, HEAD')81      res.setHeader('Content-Length', '0')82      res.end()83      return84    }85 86    var forwardError = !fallthrough87    var originalUrl = parseUrl.original(req)88    var path = parseUrl(req).pathname89 90    // make sure redirect occurs at mount91    if (path === '/' && originalUrl.pathname.substr(-1) !== '/') {92      path = ''93    }94 95    // create send stream96    var stream = send(req, path, opts)97 98    // add directory handler99    stream.on('directory', onDirectory)100 101    // add headers listener102    if (setHeaders) {103      stream.on('headers', setHeaders)104    }105 106    // add file listener for fallthrough107    if (fallthrough) {108      stream.on('file', function onFile () {109        // once file is determined, always forward error110        forwardError = true111      })112    }113 114    // forward errors115    stream.on('error', function error (err) {116      if (forwardError || !(err.statusCode < 500)) {117        next(err)118        return119      }120 121      next()122    })123 124    // pipe125    stream.pipe(res)126  }127}128 129/**130 * Collapse all leading slashes into a single slash131 * @private132 */133function collapseLeadingSlashes (str) {134  for (var i = 0; i < str.length; i++) {135    if (str.charCodeAt(i) !== 0x2f /* / */) {136      break137    }138  }139 140  return i > 1141    ? '/' + str.substr(i)142    : str143}144 145/**146 * Create a minimal HTML document.147 *148 * @param {string} title149 * @param {string} body150 * @private151 */152 153function createHtmlDocument (title, body) {154  return '<!DOCTYPE html>\n' +155    '<html lang="en">\n' +156    '<head>\n' +157    '<meta charset="utf-8">\n' +158    '<title>' + title + '</title>\n' +159    '</head>\n' +160    '<body>\n' +161    '<pre>' + body + '</pre>\n' +162    '</body>\n' +163    '</html>\n'164}165 166/**167 * Create a directory listener that just 404s.168 * @private169 */170 171function createNotFoundDirectoryListener () {172  return function notFound () {173    this.error(404)174  }175}176 177/**178 * Create a directory listener that performs a redirect.179 * @private180 */181 182function createRedirectDirectoryListener () {183  return function redirect (res) {184    if (this.hasTrailingSlash()) {185      this.error(404)186      return187    }188 189    // get original URL190    var originalUrl = parseUrl.original(this.req)191 192    // append trailing slash193    originalUrl.path = null194    originalUrl.pathname = collapseLeadingSlashes(originalUrl.pathname + '/')195 196    // reformat the URL197    var loc = encodeUrl(url.format(originalUrl))198    var doc = createHtmlDocument('Redirecting', 'Redirecting to ' + escapeHtml(loc))199 200    // send redirect response201    res.statusCode = 301202    res.setHeader('Content-Type', 'text/html; charset=UTF-8')203    res.setHeader('Content-Length', Buffer.byteLength(doc))204    res.setHeader('Content-Security-Policy', "default-src 'none'")205    res.setHeader('X-Content-Type-Options', 'nosniff')206    res.setHeader('Location', loc)207    res.end(doc)208  }209}210