Tutorial 1: Go Function w/ Input (3 minutes)
This example will show you how to test and deploy Go (Golang) code to Fn. It will also demonstrate passing data in through stdin.
First, run the following commands:
# Initialize your function creating a func.yaml file fn init --name hello-go # Test your function. This will run inside a container exactly how it will on the server fn run # Now try with an input cat sample.payload.json | fn run # Deploy your functions to the Fn server (default localhost:8080) # This will create a route to your function as well fn deploy --app myapp
Now call your function:
Or call from a browser: http://localhost:8080/r/myapp/go
And now with the JSON input:
curl -H "Content-Type: application/json" -X POST -d @sample.payload.json http://localhost:8080/r/myapp/go
Note on Dependencies
In Go, simply put them all in the
We piped JSON data into the function at the command line
cat sample.payload.json | fn run
We received our function input through stdin
We wrote our output to stdout
We sent stderr to the server logs
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