问如何在节点js中传递REST数据？

EN

const ipsum_gen = require("./generator.js");

let routes = app => {
  app.get("/", (req, res) => {
    res.status(200).send("Site is working!");
  });

  app.get("/ipsum", (req, res) => {
    let data = ipsum_gen.getAllParagraphs(1);
    res.status(200).send(data);
  });

  app.get("/ipsum/:num", (req, res) => {
    let data = [];
    let num = req.params.num;
    if (isFinite(num) && num > 0) {
      data = ipsum_gen.getAllParagraphs(num);
      res.status(200).send(data);
    }
    else {
      res.status(400).send({ message: "That is not a number." });
    }
  });
};