DEV Community 👩‍💻👨‍💻

Cover image for 75-Nodejs Course 2023: Break IV: Urls Functions
Hasan Zohdy
Hasan Zohdy

Posted on

75-Nodejs Course 2023: Break IV: Urls Functions

We were done with paths functions now let's move to another utility file, the urls

Why Urls

The purpose of this file that we are going to create is just to generate the urls for our project, so we can use it in our project easily.

Urls functions list

Now let's list our functions that we're going to use in our project.

  • url: Receives a relative path and returns the absolute url to it.
  • uploadsUrl: Receives a relative path to the uploads folder and returns the absolute url to it.
  • publicUrl: Receives a relative path to the public folder and returns the absolute url to it.

Now let's move to the implementation.

Implementation

Now create urls.ts file inside src/utils folder, and add the following code:

// src/utils/urls.ts

let baseUrl = ''

/**
 * Get full path for the given path
 */
export function url(path = "") {
  return baseUrl + path;
}

/**
 * Get uploads url
 */
export function uploadsUrl(path = "") {
  return url("/uploads/" + path);
}

/**
 * Get full path for the given path related to public route
 */
export function publicUrl(path = "") {
  return url("/public/" + path);
}
Enter fullscreen mode Exit fullscreen mode

So we just added a baseUrl variable that will hold the base url that were coming from the Fastify instance, and we added three functions, url, uploadsUrl and publicUrl that will return the absolute url to the given path.

Now let's update our createHttpApplication file to get the address from it.

But before this, let's create a function to set the baseUrl variable, so we can use it in our project.

// src/utils/urls.ts
let baseUrl = '';

/**
 * Set base url
 */
export function setBaseUrl(url: string) {
  baseUrl = url;
}

  // ..
Enter fullscreen mode Exit fullscreen mode

Now updating our createHttpApplication file:

// src/core/http/createHttpApplication.ts
import router from "core/router";
import { setBaseUrl } from "core/utils/urls";
import { httpConfig } from "./config";
import registerHttpPlugins from "./plugins";
import response from "./response";
import { getServer } from "./server";

export default async function createHttpApplication() {
  const server = getServer();

  await registerHttpPlugins();

  // call reset method on response object to response its state
  server.addHook("onResponse", response.reset.bind(response));

  router.scan(server);

  try {
    // 👇🏻 We can use the url of the server
    const baseUrl = await server.listen({
      port: httpConfig("port"),
      host: httpConfig("host"),
    });

    // update base url
    setBaseUrl(baseUrl);

    console.log(`Start browsing using ${baseUrl}`);
  } catch (err) {
    console.log(err);

    server.log.error(err);
    process.exit(1); // stop the process, exit with error
  }
}
Enter fullscreen mode Exit fullscreen mode

I just added a lien after listening to the server to set the base url and changed the const name from address to baseUrl to be more clear.

🎨 Conclusion

☕♨️ Buy me a Coffee ♨️☕

If you enjoy my articles and see it useful to you, you may buy me a coffee, it will help me to keep going and keep creating more content.

🚀 Project Repository

You can find the latest updates of this project on Github

😍 Join our community

Join our community on Discord to get help and support (Node Js 2023 Channel).

🎞️ Video Course (Arabic Voice)

If you want to learn this course in video format, you can find it on Youtube, the course is in Arabic language.

📚 Bonus Content 📚

You may have a look at these articles, it will definitely boost your knowledge and productivity.

General Topics

Packages & Libraries

React Js Packages

Courses (Articles)

Top comments (0)

50 CLI Tools You Can't Live Without

>> Check out this classic DEV post <<