redirect-query.js

//********************************************************************************************************************************
// Description: HTTP redirection in a forward-proxy context. A forward-proxy is useful for filter connections
//              particularly outbound to the internet for clients sitting behind a firewall for example.
//              In this example below, any user HTTP request from clients results in a redirection
//              to the specified site (in this case a bland example.com site).  More sophistication can be added
//              like a login page for authenticating outbound/internet access and other IT policy enforcement.
 
"use strict";
 
var fpm = require('lrs/forwardProxyModule');
var redirectHost = 'www.example.com';
var redisLib = require("redis");
var redisClient = redisLib.createClient();
 
// Handler for client requests - this pulls out the host field value
function onClientReq(servReq, servResp, next) {
  // extract the full URL request from the header
  var requestedHost = servReq.headers.host || '';
  var query = url.parse(servReq.url)
  
  // Test if the URL request matches the redirection.
  // Forward the request along on such a match thereby preventing
  // a redirect loop.
  if(requestedHost == redirectHost) {
    next();
  }
  else {
    servResp.setHeader('Content-Type', 'text/html');
    servResp.writeHead(301, {'Location' : 'http://' + redirectHost, 'Server' : 'LineRate'});
    servResp.end();
    next();
  }
}
 
var onExists = function(fp) {
  fp.on('request', onClientReq);
};
 
redisClient.set("string key", "string val", redisLib.print);
redisClient.hset("hash key", "hashtest 1", "some value", redisLib.print);
redisClient.hset(["hash key", "hashtest 2", "some other value"], redisLib.print);
fpm.on('exist', 'fp1', onExists);