mirror of
https://github.com/anaganisk/digitalocean-dynamic-dns-ip.git
synced 2024-08-30 17:42:10 +00:00
121 lines
3.4 KiB
Go
121 lines
3.4 KiB
Go
package main
|
|
|
|
import (
|
|
"bytes"
|
|
"encoding/json"
|
|
"io/ioutil"
|
|
"log"
|
|
"net/http"
|
|
"strconv"
|
|
|
|
homedir "github.com/mitchellh/go-homedir"
|
|
)
|
|
|
|
func checkError(err error) {
|
|
if err != nil {
|
|
log.Fatal(err)
|
|
}
|
|
}
|
|
|
|
// ClientConfig : configuration json
|
|
type ClientConfig struct {
|
|
APIKey string `json:"apiKey"`
|
|
Domains []Domain `json:"domains"`
|
|
}
|
|
|
|
// Domain : domains to be changed
|
|
type Domain struct {
|
|
Domain string `json:"domain"`
|
|
Records []DNSRecord `json:"records"`
|
|
}
|
|
|
|
// DNSRecord : Modifyiable DNS record
|
|
type DNSRecord struct {
|
|
ID int64 `json:"id"`
|
|
Name string `json:"name"`
|
|
Data string `json:"data"`
|
|
Type string `json:"type"`
|
|
}
|
|
|
|
// DOResponse : DigitalOcean DNS Records response.
|
|
type DOResponse struct {
|
|
DomainRecords []DNSRecord `json:"domain_records"`
|
|
}
|
|
|
|
//GetConfig : get configuration file ~/.digitalocean-dynamic-ip.json
|
|
func GetConfig() ClientConfig {
|
|
homeDirectory, err := homedir.Dir()
|
|
checkError(err)
|
|
getfile, err := ioutil.ReadFile(homeDirectory + "/.digitalocean-dynamic-ip.json")
|
|
checkError(err)
|
|
var config ClientConfig
|
|
json.Unmarshal(getfile, &config)
|
|
checkError(err)
|
|
return config
|
|
}
|
|
|
|
//CheckLocalIP : get current IP of server.
|
|
func CheckLocalIP() string {
|
|
currentIPRequest, err := http.Get("https://diagnostic.opendns.com/myip")
|
|
checkError(err)
|
|
defer currentIPRequest.Body.Close()
|
|
currentIPRequestParse, err := ioutil.ReadAll(currentIPRequest.Body)
|
|
checkError(err)
|
|
return string(currentIPRequestParse)
|
|
}
|
|
|
|
//GetDomainRecords : Get DNS records of current domain.
|
|
func GetDomainRecords(apiKey string, domain string) DOResponse {
|
|
client := &http.Client{}
|
|
request, err := http.NewRequest("GET",
|
|
"https://api.digitalocean.com/v2/domains/"+domain+"/records",
|
|
nil)
|
|
checkError(err)
|
|
request.Header.Add("Content-type", "Application/json")
|
|
request.Header.Add("Authorization", "Bearer "+apiKey)
|
|
response, err := client.Do(request)
|
|
checkError(err)
|
|
defer response.Body.Close()
|
|
body, err := ioutil.ReadAll(response.Body)
|
|
var jsonDOResponse DOResponse
|
|
e := json.Unmarshal(body, &jsonDOResponse)
|
|
checkError(e)
|
|
return jsonDOResponse
|
|
}
|
|
|
|
// UpdateRecords : Update DNS records of domain
|
|
func UpdateRecords(apiKey string, domain string, currentIP string, currentRecords DOResponse, toUpdateRecords []DNSRecord) {
|
|
for _, currentRecord := range currentRecords.DomainRecords {
|
|
for _, toUpdateRecord := range toUpdateRecords {
|
|
if toUpdateRecord.Name == currentRecord.Name && toUpdateRecord.Type == currentRecord.Type && currentIP != currentRecord.Data {
|
|
update := []byte(`{"type":"` + toUpdateRecord.Type + `","data":"` + currentIP + `"}`)
|
|
client := &http.Client{}
|
|
request, err := http.NewRequest("PUT",
|
|
"https://api.digitalocean.com/v2/domains/"+domain+"/records/"+strconv.FormatInt(int64(currentRecord.ID), 10),
|
|
bytes.NewBuffer(update))
|
|
checkError(err)
|
|
request.Header.Set("Content-Type", "application/json")
|
|
request.Header.Add("Authorization", "Bearer "+apiKey)
|
|
response, err := client.Do(request)
|
|
checkError(err)
|
|
defer response.Body.Close()
|
|
body, err := ioutil.ReadAll(response.Body)
|
|
log.Printf("DO update response for %s: %s\n", currentRecord.Name, string(body))
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
func main() {
|
|
config := GetConfig()
|
|
currentIP := CheckLocalIP()
|
|
|
|
for _, domains := range config.Domains {
|
|
domainName := domains.Domain
|
|
apiKey := config.APIKey
|
|
currentDomainRecords := GetDomainRecords(apiKey, domainName)
|
|
log.Println(domainName)
|
|
UpdateRecords(apiKey, domainName, currentIP, currentDomainRecords, domains.Records)
|
|
}
|
|
}
|