Knative sticky revisions: example golang client

client.go

package main

import (
	"fmt"
	"net/http"
	"os"
)

const header = "Knative-Serving-Tag"

func main() {
	// 1st request, let Knative decide target revision
	req, err := http.NewRequest("GET", os.Args[1], nil)
	if err != nil {
		panic(err)
	}
	resp, err := http.DefaultClient.Do(req)
	if err != nil {
		panic(err)
	}
	if resp.StatusCode != 200 {
		panic(fmt.Errorf("unexpected status code: %v ", resp.StatusCode))
	}
	rev := resp.Header.Get(header)
	fmt.Println("request 1 was processed by revision", rev)

	// 2nd request, return to previously selected revision
	req, err = http.NewRequest("GET", os.Args[1], nil)
	req.Header.Set(header, rev)
	if err != nil {
		panic(err)
	}
	resp, err = http.DefaultClient.Do(req)
	if err != nil {
		panic(err)
	}
	rev = resp.Header.Get(header)
	fmt.Println("request 2 was processed by revision", rev)
}