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shaond/proxy.js

Last active June 27, 2018 11:28
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Revisions

  1. shaond revised this gist Jun 27, 2018. No changes.
  2. shaond created this gist Jul 23, 2014.
    90 changes: 90 additions & 0 deletions proxy.js
    View file
    Original file line number Diff line number Diff line change
    @@ -0,0 +1,90 @@
    var http = require('http');
    var express = require('express');
    var router = express.Router();

    /* GET users listing. */
    router.get('/', function(req, res) {
    var request = require('request');

    var url = req.query.url;

    // If our URL doesn't contain a protocol or
    // ending slash, add it here
    if (url.indexOf('://') === -1) {
    url = 'http://' + url;
    if (!url.match(/\/$/)) {
    url += '/';
    }
    }

    var page = request.get(url, function(error, response, body) {
    if (!error) {
    var proxied = proxy(body, url);
    res.header('Cache-Control', 'no-cache, private, no-store, must-revalidate, max-stale=0, post-check=0, pre-check=0');
    res.send(proxied);
    }
    });
    });

    function proxy(html, url) {
    var cheerio = require('cheerio');
    var $ = cheerio.load(html);
    var content = '';

    var base = '<base href=\'' + url + '\' />\n';
    $('head').append(base);

    $('img[src^="public"]').each(function() {
    $(this).attr('href', url + '/' + $(this).attr('href'));
    });

    $('a:not([href^="http://"])' +
    ':not([href^="https://"])' +
    ':not([href^="//"])' +
    ':not([href^="javascript:"])')
    .each(function() {
    $(this).attr('href', url + $(this).attr('href'));
    });

    $('img:not([src^="http://"])' +
    ':not([src^="https://"])' +
    ':not([src^="//"])')
    .each(function() {
    $(this).attr('src', url + $(this).attr('src'));
    });

    $('link:not([href^="http://"])' +
    ':not([href^="https://"])' +
    ':not([href^="//"])')
    .each(function() {
    $(this).attr('href', url + $(this).attr('href'));
    });

    $('script[src]:not([src^="http://"])' +
    ':not([src^="https://"])' +
    ':not([src^="//"])')
    .each(function() {
    $(this).attr('src', url + $(this).attr('src'));
    });


    if (process.env.NODE_ENV === 'production') {
    var mavenjs = '<script id="prod"></script>\n';
    $('a').each(function() {
    $(this).attr('href', 'http://example.com/proxy?url=' + $(this).attr('href'));
    });
    }

    if (process.env.NODE_ENV === 'development') {
    var mavenjs = '<script id="dev"></script>\n';
    $('a').each(function() {
    $(this).attr('href', 'http://localhost:3000/proxy?url=' + $(this).attr('href'));
    });
    }

    $('body').append(mavenjs);

    return $.html();
    };

    module.exports = router;