HTTP endpoint (REST-API)

overview

Deal with raw HTTP requests and responses, on the client and on the server. This mimics the creation and use of a regular REST API.

The server API resembles the ExpressJS API.

We respond with JSON or HTML.

export const sayHello = onRequest((req, res) => {
    res.send("Hello from Firebase!")
})

options argument

const options = {
region: ""
cors: true,
}
export const sayHello = onRequest(options, (req, res) => {});

ExpressJS concepts and syntax

We may use middleware. Req and res objects have the shape of an expressJS req and res objects.

Build a REST request

This is not specific to firebase. From a web client, we may use fetch().

We may provide a payload and specify the method as POST.