mirror of
https://github.com/taigrr/godns
synced 2025-01-18 04:03:25 -08:00
105 lines
2.8 KiB
Go
105 lines
2.8 KiB
Go
package duck
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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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"runtime/debug"
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"time"
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"github.com/TimothyYe/godns"
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"golang.org/x/net/proxy"
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)
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var (
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// DuckUrl the API address for Duck DNS
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DuckUrl = "https://www.duckdns.org/update?domains=%s&token=%s&ip=%s"
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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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client := &http.Client{}
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if handler.Configuration.Socks5Proxy != "" {
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log.Println("use socks5 proxy:" + handler.Configuration.Socks5Proxy)
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dialer, err := proxy.SOCKS5("tcp", handler.Configuration.Socks5Proxy, nil, proxy.Direct)
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if err != nil {
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log.Println("can't connect to the proxy:", err)
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return
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}
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httpTransport := &http.Transport{}
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client.Transport = httpTransport
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httpTransport.Dial = dialer.Dial
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}
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for _, subDomain := range domain.SubDomains {
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// update IP with HTTP GET request
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resp, err := client.Get(fmt.Sprintf(DuckUrl, subDomain, handler.Configuration.LoginToken, currentIP))
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if err != nil {
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// handle error
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log.Print("Failed to update sub domain:", subDomain)
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continue
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}
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defer resp.Body.Close()
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body, err := ioutil.ReadAll(resp.Body)
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if err != nil || string(body) != "OK" {
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// handle error
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log.Print("Failed to update sub domain:", subDomain, err.Error())
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continue
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} else {
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log.Print("IP updated to:", currentIP)
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}
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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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