mirror of
https://github.com/cupcakearmy/master-thesis.git
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45 lines
821 B
Go
45 lines
821 B
Go
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package main
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import (
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"encoding/json"
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"fmt"
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"log"
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"net/http"
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"os"
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"os/exec"
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"strings"
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)
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var SERVICE = os.Getenv("SERVICE")
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func getIPs() []string {
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out, err := exec.Command("dig", "+short", "+search", SERVICE).Output()
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if err != nil {
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log.Fatal(err)
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return []string{}
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}
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trimmed := strings.TrimSpace(fmt.Sprintf("%s", out))
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if trimmed == "" {
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return []string{}
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} else {
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return strings.Split(trimmed, "\n")
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}
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}
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func main() {
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http.HandleFunc("/discoverable", func(w http.ResponseWriter, r *http.Request) {
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ips := getIPs()
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plain := r.URL.Query().Get("format") == "plain"
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if plain {
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fmt.Fprintf(w, "%s\n", strings.Join(ips, "\n"))
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} else {
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w.Header().Set("Content-Type", "application/json")
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json.NewEncoder(w).Encode(ips)
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}
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})
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log.Fatal(http.ListenAndServe(":42069", nil))
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}
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