mirror of
https://github.com/d0zingcat/cors-anywhere.git
synced 2026-05-13 23:16:51 +00:00
7271e29f21
-saves bytes, and avoids triggering IDS/WAF alarms since browser finger printing will prove these headers are unnatural and on SSL must be a MITM attack -leave x-forwarded-* intact since they can be used to block CORS proxy abuse if the not-CORS origin webmaster really has to block the proxy and they are not unique to Heroku platform
53 lines
1.8 KiB
JavaScript
53 lines
1.8 KiB
JavaScript
// Listen on a specific host via the HOST environment variable
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var host = process.env.HOST || '0.0.0.0';
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// Listen on a specific port via the PORT environment variable
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var port = process.env.PORT || 8080;
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// Grab the blacklist from the command-line so that we can update the blacklist without deploying
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// again. CORS Anywhere is open by design, and this blacklist is not used, except for countering
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// immediate abuse (e.g. denial of service). If you want to block all origins except for some,
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// use originWhitelist instead.
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var originBlacklist = parseEnvList(process.env.CORSANYWHERE_BLACKLIST);
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var originWhitelist = parseEnvList(process.env.CORSANYWHERE_WHITELIST);
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function parseEnvList(env) {
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if (!env) {
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return [];
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}
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return env.split(',');
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}
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// Set up rate-limiting to avoid abuse of the public CORS Anywhere server.
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var checkRateLimit = require('./lib/rate-limit')(process.env.CORSANYWHERE_RATELIMIT);
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var cors_proxy = require('./lib/cors-anywhere');
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cors_proxy.createServer({
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originBlacklist: originBlacklist,
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originWhitelist: originWhitelist,
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requireHeader: ['origin', 'x-requested-with'],
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checkRateLimit: checkRateLimit,
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removeHeaders: [
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'cookie',
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'cookie2',
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// Strip Heroku-specific headers
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'x-heroku-queue-wait-time',
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'x-heroku-queue-depth',
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'x-heroku-dynos-in-use',
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'x-request-start',
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'x-request-id',
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'via',
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'connect-time',
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'total-route-time',
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// Other Heroku added debug headers
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// 'x-forwarded-for',
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// 'x-forwarded-proto',
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// 'x-forwarded-port',
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],
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redirectSameOrigin: true,
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httpProxyOptions: {
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// Do not add X-Forwarded-For, etc. headers, because Heroku already adds it.
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xfwd: false,
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},
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}).listen(port, host, function() {
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console.log('Running CORS Anywhere on ' + host + ':' + port);
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});
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