add get-exit-nodes script

src/get-exit-nodes.js

@@ -0,0 +1,65 @@
+const fs = require('fs');
+const path = require('path');
+const util = require('util');
+const Consensus = require('./tor/Consensus');
+const OR = require('./tor/OnionRouter');
+
+const LogLevels = {
+  off: 0,
+  error: 1,
+  warn: 2,
+  info: 3,
+  debug: 4
+}
+let logLevel = LogLevels.error;
+function timestamp() {
+  const d = new Date().toISOString();
+  return [d.slice(5, 5), d.slice(11, 8)].join(' ')
+}
+class Logger {
+  debug(...args) {
+    if (LogLevels.debug > logLevel) return;
+    const [format, ...rest] = args;
+    console.error(timestamp(), "D", util.format(format, ...rest));
+  }
+  info(...args) {
+    if (LogLevels.info > logLevel) return;
+    const [format, ...rest] = args;
+    console.error(timestamp(), "I", util.format(format, ...rest));
+  }
+  warn(...args) {
+    if (LogLevels.warn > logLevel) return;
+    const [format, ...rest] = args;
+    console.error(timestamp(), "W", util.format(format, ...rest));
+  }
+  error(...args) {
+    if (LogLevels.error > logLevel) return;
+    const [format, ...rest] = args;
+    console.error(timestamp(), "E", util.format(format, ...rest));
+  }
+}
+
+(async function main(args) {
+  try {
+    const ip_only = args[0] === '--ip-only';
+    const logger = new Logger();
+    const home = process.env.HOME || process.env.USERPROFILE;
+    const app_cache_path = path.join(home, '.cache', 'mini-tor-js');
+    const cached_consensus_path = path.join(app_cache_path, 'cached-consensus')
+    fs.mkdirSync(app_cache_path, {recursive: true});
+    // Load consensus
+    const consensus = new Consensus(logger);
+    await consensus.fetch(cached_consensus_path);
+    consensus.set_allowed_dir_ports(80, 443);
+
+    const routers = consensus.get_onion_routers_by_criteria({
+      flags: OR.valid | OR.exit
+    });
+    for (const router of routers) {
+      if (ip_only) console.log(router.ip);
+      else console.log(router.name, router.ip, router.dir_port, router.or_port);
+    }
+  } catch (error) {
+    console.error(error);
+  }
+})(process.argv.slice(2))