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server.go
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server.go
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package main
import (
"encoding/json"
"fmt"
"github.com/civo/civogo"
log "github.com/sirupsen/logrus"
"net/http"
"os"
"strings"
)
type presentRequest struct {
Fqdn string `json:"fqdn"`
Value string `json:"value"`
}
func present(w http.ResponseWriter, r *http.Request) {
decoder := json.NewDecoder(r.Body)
var body presentRequest
err := decoder.Decode(&body)
if err != nil {
http.Error(w, fmt.Sprintf("%s", err), http.StatusBadRequest)
return
}
client, err := civogo.NewClient(
strings.TrimSpace(os.Getenv("CIVO_API_TOKEN")),
strings.TrimSpace(os.Getenv("CIVO_API_REGION")),
)
if err != nil {
log.Errorf("Couldn't get Civo client: %s", err)
http.Error(w, fmt.Sprintf("%s", err), http.StatusInternalServerError)
return
}
record := strings.Split(body.Fqdn, ".")[0]
zone := body.Fqdn[len(record)+1 : len(body.Fqdn)-1]
domain, err := client.GetDNSDomain(zone)
if err != nil {
log.Errorf("Couldn't get DNS zone: `%s`: %s", zone, err)
http.Error(w, fmt.Sprintf("%s", err), http.StatusNotFound)
return
}
config := &civogo.DNSRecordConfig{
Name: record,
Value: body.Value,
Type: civogo.DNSRecordTypeTXT,
Priority: 10,
TTL: 300,
}
_, err = client.CreateDNSRecord(domain.ID, config)
if err != nil {
log.Errorf("Failed to create DNS record `%s`: %s", record, err)
http.Error(w, fmt.Sprintf("%s", err), http.StatusBadRequest)
return
}
log.Infof("Successfully created DNS record `%s` in zone `%s`", record, zone)
}
func cleanup(w http.ResponseWriter, r *http.Request) {
decoder := json.NewDecoder(r.Body)
var body presentRequest
err := decoder.Decode(&body)
if err != nil {
http.Error(w, fmt.Sprintf("%s", err), http.StatusBadRequest)
return
}
client, err := civogo.NewClient(
strings.TrimSpace(os.Getenv("CIVO_API_TOKEN")),
strings.TrimSpace(os.Getenv("CIVO_API_REGION")),
)
if err != nil {
log.Errorf("Couldn't get Civo client: %s", err)
http.Error(w, fmt.Sprintf("%s", err), http.StatusInternalServerError)
return
}
record := strings.Split(body.Fqdn, ".")[0]
zone := body.Fqdn[len(record)+1 : len(body.Fqdn)-1]
domain, err := client.GetDNSDomain(zone)
if err != nil {
log.Errorf("Couldn't get DNS zone: `%s`: %s", zone, err)
http.Error(w, fmt.Sprintf("%s", err), http.StatusNotFound)
return
}
records, err := client.ListDNSRecords(domain.ID)
if err != nil {
log.Errorf("Couldn't get DNS records: %s", err)
http.Error(w, fmt.Sprintf("%s", err), http.StatusNotFound)
return
}
var existingRecord civogo.DNSRecord
for _, rec := range records {
if rec.Name == record && rec.Value == body.Value {
existingRecord = rec
}
}
res, err := client.DeleteDNSRecord(&existingRecord)
if err != nil {
log.Errorf("Couldn't delete DNS record `%s`: %s", record, err)
http.Error(w, fmt.Sprintf("%s", err), http.StatusInternalServerError)
return
}
if res.Result != "success" {
log.Errorf("Couldn't delete DNS record `%s`: %s", record, res)
http.Error(w, fmt.Sprintf("%s", err), http.StatusInternalServerError)
return
}
log.Infof("Successfully deleted DNS record `%s` from zone `%s`", record, zone)
}
func health(w http.ResponseWriter, r *http.Request) {
log.Infof("Health check OK")
}
func main() {
http.HandleFunc("/present", present)
http.HandleFunc("/cleanup", cleanup)
http.HandleFunc("/health", health)
http.ListenAndServe(":8080", nil)
}