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);
}
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;
}
// ..
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
}
}
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
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