Displaying “Hello world!” is a nonsense for this kind of plugin. We gather the weather data from a plugin API: MetaWeather.
We will create a route allowing us to fetch the weather for any city in the world.
Let’s check the API documentation first:
The route /api/location/search/?query=(query) allows us to fetch metadata about a city,
containing the woeid property, needed to fetch the weather of the city with the route
/api/location/(woeid).
Two API calls are needed: perfect example!
After installing Nodegate, let’s create a file index.js. We will require nodegate and
initialize it. We will also need the aggregator worker, let’s import it as well.
const nodegate = require('nodegate');
const gate = nodegate();
const { aggregate } = nodegate.workers;
Now we will create our first route, GET, with the name of the city on the path. The route object
needs three attributes: the method, the path, and the workflow. The workflow will then be processed
synchronously, using on each step a container generated from the request, and containing the
parameters and the body of the request.
gate.route({
method: 'get',
path: '/weather/:city',
workflow: [
],
});
Now we have to set the workflow of our route. The process is simple: we need to fetch the woeid
from the first route of the API, then to fetch the weather from the second one. On this example, we
will return all the collected data by using the aggregate worker twice.
gate.route({
method: 'get',
path: '/weather/:city',
workflow: [
aggregate('get', 'https://www.metaweather.com/api/location/search/?query={params.city}', 'search'),
aggregate('get', 'https://www.metaweather.com/api/location/{body.search.0.woeid}'),
],
});
Note that all the data contained on the container is accessible on the urls.
We finally just have to listen a port:
gate.listen(8080);
And to start our server by using your terminal:
$ node index.js
That’s it! Open your brower and try it out by typing on the url: http://localhost:8080/weather/paris
You should have a JSON with all the data we wanted!