serverless-shell-scripts/invoke.go

package main

import (
        "log"
        "net/http"
        "os"
        "os/exec"
)

func main() {
        http.HandleFunc("/", scriptHandler)

        // Determine port for HTTP service.
        port := os.Getenv("PORT")
        if port == "" {
                port = "8080"
                log.Printf("Defaulting to port %s", port)
        }

        // Start HTTP server.
        log.Printf("Listening on port %s", port)
        if err := http.ListenAndServe(":"+port, nil); err != nil {
                log.Fatal(err)
        }
}

func scriptHandler(w http.ResponseWriter, r *http.Request) {
        cmd := exec.CommandContext(r.Context(), "/bin/sh", "script.sh")
        cmd.Stderr = os.Stderr
        out, err := cmd.Output()
        if err != nil {
                w.WriteHeader(500)
        }
        log.Printf("Echo from script: %s", out)
        w.Write(out)
}