Creating your first HTTP PUT method

Whenever we want to update a record that we have created earlier or want to create a new record if it does not exist, often termed an Upsert, then we go with the HTTP PUT method implementation, which we will cover in this recipe.

How to do it...

1. Install the github.com/gorilla/mux package using the go get command, as follows:

$ go get github.com/gorilla/mux

2. Create http-rest-put.go where we will define an additional route that supports the HTTP PUT method and a handler that either updates the employee details for the provided ID or adds an employee to the initial static array of employees; if the ID does not exist, marshal it to the JSON, and write it to an HTTP response stream, as follows...