mirror of
https://github.com/taigrr/godns
synced 2025-01-18 04:03:25 -08:00
101 lines
2.7 KiB
Go
101 lines
2.7 KiB
Go
package google
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import (
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"fmt"
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"io/ioutil"
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"log"
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"net/http"
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"net/url"
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"runtime/debug"
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"strings"
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"time"
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"github.com/TimothyYe/godns"
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)
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var (
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// GoogleUrl the API address for Google Domains
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GoogleUrl = "https://domains.google.com/nic/update"
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)
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// Handler struct
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type Handler struct {
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Configuration *godns.Settings
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}
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// SetConfiguration pass dns settings and store it to handler instance
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func (handler *Handler) SetConfiguration(conf *godns.Settings) {
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handler.Configuration = conf
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}
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// DomainLoop the main logic loop
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func (handler *Handler) DomainLoop(domain *godns.Domain, panicChan chan<- godns.Domain) {
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defer func() {
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if err := recover(); err != nil {
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log.Printf("Recovered in %v: %v\n", err, debug.Stack())
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panicChan <- *domain
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}
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}()
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var lastIP string
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for {
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currentIP, err := godns.GetCurrentIP(handler.Configuration)
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if err != nil {
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log.Println("get_currentIP:", err)
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continue
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}
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log.Println("currentIP is:", currentIP)
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//check against locally cached IP, if no change, skip update
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if currentIP == lastIP {
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log.Printf("IP is the same as cached one. Skip update.\n")
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} else {
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lastIP = currentIP
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for _, subDomain := range domain.SubDomains {
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log.Printf("%s.%s Start to update record IP...\n", subDomain, domain.DomainName)
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handler.UpdateIP(domain.DomainName, subDomain, currentIP)
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// Send mail notification if notify is enabled
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if handler.Configuration.Notify.Enabled {
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log.Print("Sending notification to:", handler.Configuration.Notify.SendTo)
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if err := godns.SendNotify(handler.Configuration, fmt.Sprintf("%s.%s", subDomain, domain.DomainName), currentIP); err != nil {
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log.Println("Failed to send notification")
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}
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}
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}
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}
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// Sleep with interval
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log.Printf("Going to sleep, will start next checking in %d seconds...\r\n", handler.Configuration.Interval)
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time.Sleep(time.Second * time.Duration(handler.Configuration.Interval))
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}
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}
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// UpdateIP update subdomain with current IP
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func (handler *Handler) UpdateIP(domain, subDomain, currentIP string) {
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values := url.Values{}
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values.Add("hostname", fmt.Sprintf("%s.%s", subDomain, domain))
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values.Add("username:password", fmt.Sprintf("%s:%s", handler.Configuration.Email, handler.Configuration.Password))
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values.Add("myip", currentIP)
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client := godns.GetHttpClient(handler.Configuration)
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req, _ := http.NewRequest("POST", GoogleUrl, strings.NewReader(values.Encode()))
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resp, err := client.Do(req)
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if err != nil {
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log.Println("Request error...")
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log.Println("Err:", err.Error())
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} else {
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body, _ := ioutil.ReadAll(resp.Body)
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if resp.StatusCode == http.StatusOK {
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log.Println("Update IP success:", string(body))
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} else {
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log.Println("Update IP failed:", string(body))
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}
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}
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}
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