server/httphandler.js

   1 var url         = require('url'),
   2     fs          = require('fs'),
   3     node_static = require('node-static'),
   4     _           = require('lodash');
   5
   6
   7
   8 var HttpHandler = function (config) {
   9     var public_html = config.public_html || 'client/';
  10     this.file_server = new node_static.Server(public_html);
  11 };
  12
  13 module.exports.HttpHandler = HttpHandler;
  14
  15
  16
  17 HttpHandler.prototype.serve = function (request, response) {
  18     // The incoming requests base path (ie. /kiwiclient)
  19     var base_path = global.config.http_base_path || '/kiwi',
  20         base_path_regex;
  21
  22     // Trim of any trailing slashes
  23     if (base_path.substr(base_path.length - 1) === '/') {
  24         base_path = base_path.substr(0, base_path.length - 1);
  25     }
  26
  27     // Build the regex to match the base_path
  28     base_path_regex = base_path.replace(/[-/\\^$*+?.()|[\]{}]/g, '\\$&');
  29
  30     // Any asset request to head into the asset dir
  31     request.url = request.url.replace(base_path + '/assets/', '/assets/');
  32
  33     // Any requests for /client to load the index file
  34     if (request.url.match(new RegExp('^' + base_path_regex + '([/$]|$)', 'i'))) {
  35         request.url = '/';
  36     }
  37
  38     // If the 'magic' translation is requested, figure out the best language to use from
  39     // the Accept-Language HTTP header. If nothing is suitible, serve an empty response,
  40     // Kiwi will just use the default en-gb strings baked in to it.
  41     if (request.url === '/assets/locales/magic.json') {
  42         return serveMagicLocale.call(this, request, response);
  43     }
  44
  45     this.file_server.serve(request, response, function (err) {
  46         if (err) {
  47             response.writeHead(err.status, err.headers);
  48             response.end();
  49         }
  50     });
  51 };
  52
  53 var serveMagicLocale = function (request, response) {
  54     var langs = [],
  55         available = [],
  56         i = 0;
  57     if (request.headers['accept-language']) {
  58         // Example: en-gb,en;q=0.5
  59         langs = request.headers['accept-language'].split(',');
  60         available = (function () {
  61             var files = [],
  62                 l = [];
  63             files = fs.readdirSync('client/assets/locales');
  64             files.forEach(function (file) {
  65                 if (file.slice(-5) === '.json') {
  66                     l.push(file.slice(0, -5));
  67                 }
  68             });
  69             return l;
  70         })();
  71         for (i = 0; i < langs.length; i++) {
  72             langs[i] = langs[i].split(';q=');
  73             langs[i][1] = (typeof langs[i][1] === 'string') ? parseFloat(langs[i][1]) : 1.0;
  74         }
  75         langs.sort(function (a, b) {
  76             return b[1] - a[1];
  77         });
  78
  79         for (i = 0; i < langs.length; i++) {
  80             if (langs[i][0] === '*') {
  81                 break;
  82             } else if (_.contains(available, langs[i][0])) {
  83                 return this.file_server.serveFile('/assets/locales/' + langs[i][0] + '.json', 200, {Vary: 'Accept-Language', 'Content-Language': langs[i][0]}, request, response);
  84             }
  85         }
  86     }
  87
  88     response.writeHead(200, {
  89         'Vary': 'Accept-Language',
  90         'Content-Type': 'application/json',
  91         'Content-Language': 'en-gb'
  92     });
  93     response.end('{"en-gb": {"":{}}}');
  94 };