mirror of
https://github.com/fnproject/fn.git
synced 2022-10-28 21:29:17 +03:00
84 lines
2.3 KiB
Markdown
84 lines
2.3 KiB
Markdown
# Tutorial 1: NodeJS Function w/ Input (3 minutes)
|
|
|
|
This example will show you how to test and deploy Node code to Oracle Functions. It will also demonstrate passing data in through stdin.
|
|
|
|
### First, run the following commands:
|
|
|
|
```sh
|
|
# Initialize your function creating a func.yaml file
|
|
fn init --name hello-node
|
|
|
|
# Test your function.
|
|
# This will run inside a container exactly how it will on the server. It will also install and vendor dependencies from Gemfile
|
|
fn run
|
|
|
|
# Now try with an input
|
|
cat sample.payload.json | fn run
|
|
|
|
# Deploy your functions to the Oracle Functions server (default localhost:8080)
|
|
# This will create a route to your function as well
|
|
fn deploy --app myapp
|
|
```
|
|
### Now call your function:
|
|
|
|
```sh
|
|
curl http://localhost:8080/r/myapp/hello-node
|
|
```
|
|
|
|
Or call from a browser: [http://localhost:8080/r/myapp/hello-node](http://localhost:8080/r/myapp/hello-node)
|
|
|
|
And now with the JSON input:
|
|
|
|
```sh
|
|
curl -H "Content-Type: application/json" -X POST -d @sample.payload.json http://localhost:8080/r/myapp/hello-node
|
|
```
|
|
|
|
That's it! Our `fn deploy` packaged our function and sent it to the Oracle Functions server. Try editing `func.js`
|
|
and then doing another `fn deploy`.
|
|
|
|
### Note on Dependencies
|
|
|
|
Create a [package.json](https://docs.npmjs.com/getting-started/using-a-package.json) file in your functions directory. The CLI should pick that up and build in all
|
|
your dependencies on `fn run` and `fn deploy`.
|
|
|
|
For example, using the `package.json` file in this directory which includes the [request](https://www.npmjs.com/package/request) package, you can add this to func.js and it will work:
|
|
|
|
```js
|
|
var request = require('request');
|
|
request('http://www.google.com', function (error, response, body) {
|
|
if (!error && response.statusCode == 200) {
|
|
console.log(body) // Show the HTML for the Google homepage.
|
|
}
|
|
})
|
|
```
|
|
|
|
|
|
# In Review
|
|
|
|
1. We piped JSON data into the function at the command line
|
|
```sh
|
|
cat sample.payload.json | fn run
|
|
```
|
|
|
|
2. We received our function input through **stdin**
|
|
```node
|
|
obj = JSON.parse(fs.readFileSync('/dev/stdin').toString())
|
|
```
|
|
|
|
3. We wrote our output to **stdout**
|
|
```node
|
|
console.log
|
|
```
|
|
|
|
4. We sent **stderr** to the server logs
|
|
```node
|
|
console.error
|
|
```
|
|
|
|
|
|
# Next Up
|
|
## [Part 2: Input Parameters](../../params)
|
|
|
|
|
|
|