transformerRouter.js

function route(pathname, req, res, body) {
  console.log(
    "transformerRouter:route() About to route a request for " + pathname
  );

  try {
    // dynamically load the js file base on the url path
    var handler = require("." + pathname);
    var respToReturn = "Failed to process request";

    console.log("transformerRouter:route() selected handler: " + handler);

    // make sure we got a correct instantiation of the module
    if (typeof handler.post === "function") {
      // route to the right method in the module based on the HTTP action
      if (req.method.toLowerCase() == "get") {
        respToReturn = handler.get(req, res, body);
      } else if (req.method.toLowerCase() == "post") {
        respToReturn = handler.post(req, res, body);
      } else if (req.method.toLowerCase() == "put") {
        respToReturn = handler.put(req, res, body);
      } else if (req.method.toLowerCase() == "delete") {
        respToReturn = handler.delete(req, res, body);
      }

      console.log("transformerRouter:route() routed successfully");
      return respToReturn;
    }
  } catch (err) {
    console.log(
      "transformerRouter:route() exception instantiating handler: " + err.stack
    );
    throw err;
  }

  var errorMessage =
    "transformerRoute:route() No request handler found for " + pathname;
  console.log(errorMessage);

  throw new Error(errorMessage);
}

exports.route = route;