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97 lines
2.2 KiB
Markdown
97 lines
2.2 KiB
Markdown
# Fetching external data
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This guide explains how to fetch data from an external service to use it in your app.
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In this example we will see how to daily fetch Docker pull count to store the result in your database.
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## Content Type settings
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First, we need to create a Content Type, in this example we will call it `hit` with a `date` and `count` attribute.
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Your Content Type should look like this:
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**Path —** `./api/hit/models/Hit.settings.json`
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```json
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{
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"connection": "default",
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"collectionName": "hits",
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"info": {
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"name": "hit",
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"description": ""
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},
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"options": {
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"increments": true,
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"timestamps": true,
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"comment": ""
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},
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"attributes": {
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"count": {
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"type": "integer"
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},
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"date": {
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"type": "date"
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}
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}
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}
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```
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## Fetch the data
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Now we will create a function that will be usable everywhere in your strapi application.
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**Path —** `./config/functions/docker.js`
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```js
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const axios = require('axios');
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module.exports = async () => {
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const { data } = await axios.get(
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'https://hub.docker.com/v2/repositories/strapi/strapi/'
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);
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console.log(data);
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};
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```
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`data` contains all the data received from the Docker Hub API. What we want here is to add the `pull_count` value in your database.
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## Create a `hit` entry
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let's programmatically create the entry.
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**Path —** `./config/functions/docker.js`
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```js
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const axios = require('axios');
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module.exports = async () => {
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const { data } = await axios.get(
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'https://hub.docker.com/v2/repositories/strapi/strapi/'
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);
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await strapi.query('hit').create({
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date: new Date(),
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count: data.pull_count,
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});
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};
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```
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With this code, everytime this function is called it will fetch the docker repo's data and insert the current `pull_count` with the corresponding date in your Strapi database.
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## Call the function
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Here is how to call the function in your application `strapi.config.functions.docker()`
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So let's execute this function everyday at 2am. For this we will use a [CRON tasks](../concepts/configurations.md#cron-tasks).
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**Path —** `./config/functions/cron.js`
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```js
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module.exports = {
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'0 2 * * *': () => {
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strapi.config.functions.docker();
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},
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};
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```
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