I2P_in_Private_Browsing_Mode_for_Firefox/handler.js

function routerHost(url) {
  console.log('(urlcheck) HANDLER URL CHECK');
  let hostname = '';
  let path = '';
  function pathcheck(str) {
    console.log('(urlcheck) HANDLER PATH CHECK', str);
    if (str != undefined) {
      let final = str.split('/')[0];
      if (final === 'i2ptunnelmgr' || final === 'i2ptunnel') {
        console.log('(urlcheck) Tunnel application path', final);
        return 'i2ptunnelmgr';
      } else if (
        final === 'i2psnark' ||
        final === 'torrents' ||
        final.startsWith('transmission') ||
        final.startsWith('tracker') ||
        str.includes(':7662')
      ) {
        console.log('(urlcheck) Torrent application path', final);
        return 'i2psnark';
      } else if (final === 'webmail' || final === 'susimail') {
        console.log('(urlcheck) Mail application path', final);
        return 'webmail';
      } else if (final.startsWith('MuWire')) {
        if (!url.includes('.png')) {
          console.log('(urlcheck) MuWire application path', final);
          return 'muwire';
        }
      } else if (
        final === 'home' ||
        final === 'console' ||
        final === 'dns' ||
        final === 'sitemap' ||
        final.startsWith('config')
      ) {
        console.log('(urlcheck) Console application path', final);
        return 'routerconsole';
      }
    }
    return true;
  }
  if (url.indexOf('://') > -1) {
    hostname = url.split('/')[2];
    let prefix = url.substr(0, url.indexOf('://') + 3);
    path = url.replace(prefix + hostname + '/', '');
  } else if (identifyProtocolHandler(url)) {
    let newurl = identifyProtocolHandler(url);
    return routerHost(newurl);
  } else {
    hostname = url.split('/')[0];
    path = url.replace(hostname + '/', '');
  }
  if (hostname === control_host + ':' + control_port) {
    //console.log("(hostcheck) router console found on configured ports");
    return pathcheck(path);
  }
  if (hostname === 'localhost' + ':' + control_port) {
    //console.log("(hostcheck) router console found on configured ports");
    return pathcheck(path);
  }
  if (hostname === '127.0.0.1' + ':' + control_port) {
    return pathcheck(path);
  }

  return false;
}

function identifyProtocolHandler(url) {
  //console.log("looking for handler-able requests")
  if (routerHost(url)) {
    if (url.includes(encodeURIComponent('ext+rc:'))) {
      return url.replace(encodeURIComponent('ext+rc:'), '');
    } else if (url.includes('ext+rc:')) {
      return url.replace('ext+rc:', '');
    }
  } else if (url.includes('ext+rc:')) {
    return url;
  }
  return false;
}

function trimHost(url) {
  let hostname = '';
  let prefix = '';
  if (url.indexOf('://') > -1) {
    prefix = url.substr(0, url.indexOf('://') + 3);
    hostname = url.split('/')[2];
  } else {
    hostname = url.split('/')[0];
  }
  let path = url.replace(prefix + hostname, '');
  console.log('(handler) path', prefix + hostname, path);
  return path;
}

var handlerSetup = function(requestDetails) {
  //console.log("checking protocol handler listener")
  let rwurl = identifyProtocolHandler(requestDetails.url);
  if (rwurl != false) {
    console.log('(handler) rewrite URL requested', rwurl);
    requestDetails.redirectUrl = rwurl;
    requestDetails.url = trimHost(rwurl);
    requestDetails.originUrl = trimHost(rwurl);
  }
  return requestDetails;
};

browser.webRequest.onBeforeRequest.addListener(
  handlerSetup,
  { urls: ['<all_urls>'] },
  ['blocking']
);