.drone.yml

@@ -1,19 +0,0 @@
-kind: pipeline
-name: default
-steps:
-  - name: submodules
-    image: alpine/git
-    commands:
-      - git submodule update --init --recursive
-  - name: build-container
-    image: plugins/docker
-    settings:
-      repo: git.saintnet.tech/stryan/tildewatch
-      registry: git.saintnet.tech
-      password:
-        from_secret: build_pass
-      username:
-        from_secret: build_username
-      dockerfile: Containerfile
-      tags: latest
-      layers: true

.gitignore

@@ -1,3 +1,3 @@
 config.yaml
-env
+.envrc
 tildewatch

main.go

@@ -2,20 +2,15 @@ package main
 
 import (
 	"context"
-	"encoding/json"
+	"errors"
 	"fmt"
 	"net/http"
 	"os"
 	"os/signal"
 	"sync"
-	"time"
 
 	"github.com/charmbracelet/log"
-	"github.com/go-chi/chi/v5"
-	"github.com/go-chi/chi/v5/middleware"
-	"github.com/go-gandi/go-gandi"
 	"github.com/go-gandi/go-gandi/config"
-	"golang.org/x/exp/slices"
 	"gopkg.in/yaml.v2"
 )
 
@@ -52,34 +47,33 @@ func main() {
 	}
 
 	debug := os.Getenv("WATCH_DEBUG")
-	watchusers, err := loadConfig(file)
+	watchconf, err := loadConfig(file)
 	if err != nil {
 		log.Fatal(err)
 	}
-	for _, v := range watchusers.Users {
-		if v.Hostname == "" {
-			log.Fatal("bad config", "user", v)
-		}
-	}
 
 	conf := config.Config{
 		APIKey: apikey,
 	}
 
-	a := &Watch{
-		Tildes: make(map[string]Registration),
+	a := &Tilde{
 		debug:  debug != "",
 		domain: domain,
 		conf:   conf,
 	}
-	for _, v := range watchusers.Users {
-		a.Tildes[v.Secret] = Registration{
-			Domain: v.Hostname,
-			Update: false,
-			IPAddr: "",
+	for _, v := range watchconf.Users {
+		err := a.Add(&v)
+		if err != nil {
+			log.Fatal(err)
 		}
 	}
-	log.Info(a.Tildes)
+	for _, v := range watchconf.Hosts {
+		err := a.Add(&v)
+		if err != nil {
+			log.Fatal(err)
+		}
+	}
+	log.Info(a)
 	server := &http.Server{Addr: fmt.Sprintf("0.0.0.0:%v", port), Handler: a.server()}
 	var wg sync.WaitGroup
 	c := make(chan os.Signal, 1)
@@ -97,8 +91,8 @@ func main() {
 	wg.Add(1)
 	go func() {
 		err := server.ListenAndServe()
-		if err != nil {
-			log.Warn("error shutting down web server", "error", err)
+		if err != nil && !errors.Is(err, http.ErrServerClosed) {
+			log.Warn(err)
 		}
 		wg.Done()
 		log.Info("watch web server shutdown")
@@ -118,93 +112,3 @@ func main() {
 	wg.Wait()
 	log.Info("shut down")
 }
-
-func (watch *Watch) server() http.Handler {
-	r := chi.NewRouter()
-	r.Use(middleware.Logger)
-	r.Post("/submit", func(w http.ResponseWriter, r *http.Request) {
-		var payload Request
-		err := json.NewDecoder(r.Body).Decode(&payload)
-		if err != nil {
-			log.Warn("error parsing ip submission", "error", err)
-			w.WriteHeader(http.StatusBadRequest)
-			return
-		}
-		found := false
-		for i, v := range watch.Tildes {
-			if payload.Secret == i && v.IPAddr != payload.IPAddr {
-				cur := watch.Tildes[i]
-				watch.Tildes[i] = Registration{
-					IPAddr: payload.IPAddr,
-					Update: true,
-					Domain: cur.Domain,
-				}
-				found = true
-			}
-		}
-		if !found {
-			w.WriteHeader(http.StatusUnauthorized)
-		}
-		w.WriteHeader(http.StatusOK)
-	})
-	return r
-}
-
-func (watch *Watch) run(ctx context.Context) error {
-	ticker := time.NewTicker(5 * time.Second)
-	for {
-		select {
-		case <-ticker.C:
-			for i, v := range watch.Tildes {
-				if v.Update {
-					err := watch.runUpdate(i, v)
-					if err != nil {
-						log.Warn("error running update", "error", err)
-					}
-				}
-			}
-
-		case <-ctx.Done():
-			ticker.Stop()
-			return nil
-		}
-	}
-}
-
-func (watch *Watch) runUpdate(token string, reg Registration) error {
-	if reg.Domain == "" || reg.IPAddr == "" {
-		return fmt.Errorf("invalid registration for update %v: %v", reg.Domain, reg.IPAddr)
-	}
-	if watch.debug {
-		log.Info("would run updates", "subdomain", reg.Domain)
-		return nil
-	}
-	log.Info("updating registration", "subdomain", reg.Domain, "ip", reg.IPAddr)
-	dnsclient := gandi.NewLiveDNSClient(watch.conf)
-	log.Info("getting domain records", "domain", watch.domain, "subdomain", reg.Domain)
-	curr, err := dnsclient.GetDomainRecordsByName(watch.domain, reg.Domain)
-	if err != nil {
-		return fmt.Errorf("error getting domain records: %w", err)
-	}
-	if len(curr) == 0 {
-		log.Info("no records found for subdomain, not forcing creationg", "subdomain", reg.Domain)
-	}
-	for _, v := range curr {
-		if v.RrsetType == "A" {
-			if slices.Contains(v.RrsetValues, reg.IPAddr) {
-				log.Info("not updating, already set", "host", reg.Domain, "ip", reg.IPAddr)
-			} else {
-				_, err := dnsclient.UpdateDomainRecordByNameAndType(watch.domain, reg.Domain, "A", 900, []string{reg.IPAddr})
-				if err != nil {
-					return fmt.Errorf("error updating record %w", err)
-				}
-				log.Info("updating domain successfully", "subdomain", reg.Domain)
-			}
-			toUp := watch.Tildes[token]
-			toUp.Update = false
-			watch.Tildes[token] = toUp
-
-		}
-	}
-	return nil
-}

registration.go

@@ -0,0 +1,90 @@
+package main
+
+import (
+	"io"
+	"net/http"
+	"strings"
+
+	"github.com/go-gandi/go-gandi/config"
+)
+
+type Registration interface {
+	Valid() bool
+	Update(config.Config) (string, error)
+	HasSecret(string) bool
+	Domain() string
+	IP() string
+}
+
+type UserRegistration struct {
+	Subdomain string `yaml:"subdomain"`
+	Secret    string `yaml:"secret"`
+	ip        string
+	update    bool
+}
+
+func (u *UserRegistration) Valid() bool {
+	return u.Subdomain != "" && u.Secret != ""
+}
+
+func (u *UserRegistration) Update(c config.Config) (string, error) {
+	if u.update {
+		u.update = false
+		return u.ip, nil
+	}
+	return "", nil
+}
+
+func (u *UserRegistration) HasSecret(s string) bool {
+	return u.Secret == s
+}
+
+func (u *UserRegistration) Domain() string {
+	return u.Subdomain
+}
+
+func (u *UserRegistration) IP() string {
+	return u.ip
+}
+
+type HostRegistration struct {
+	Subdomain string `yaml:"subdomain"`
+	ipddr     string
+}
+
+func (h HostRegistration) Valid() bool {
+	return h.Subdomain != ""
+}
+
+func (h *HostRegistration) Update(_ config.Config) (string, error) {
+	resp, err := http.Get("icanhazip.com")
+	if err != nil {
+		return "", err
+	}
+
+	defer resp.Body.Close()
+
+	body, err := io.ReadAll(resp.Body)
+	if err != nil {
+		return "", err
+	}
+	var result string
+	dynip := strings.TrimSpace(string(body))
+	if dynip != h.ipddr {
+		h.ipddr = dynip
+		result = dynip
+	}
+	return result, nil
+}
+
+func (h *HostRegistration) HasSecret(_ string) bool {
+	return false
+}
+
+func (h *HostRegistration) Domain() string {
+	return h.Subdomain
+}
+
+func (h *HostRegistration) IP() string {
+	return h.ipddr
+}

tilde.go

@@ -0,0 +1,128 @@
+package main
+
+import (
+	"context"
+	"encoding/json"
+	"errors"
+	"fmt"
+	"net/http"
+	"slices"
+	"time"
+
+	"github.com/charmbracelet/log"
+	"github.com/go-chi/chi/v5"
+	"github.com/go-chi/chi/v5/middleware"
+	"github.com/go-gandi/go-gandi"
+	"github.com/go-gandi/go-gandi/config"
+)
+
+type Tilde struct {
+	regs  []Registration
+	debug bool
+
+	domain string
+	conf   config.Config
+}
+
+var errRegNotFound = errors.New("registration not found")
+
+func (t *Tilde) Add(r Registration) error {
+	if !r.Valid() {
+		return errors.New("invalid registration")
+	}
+	_, err := r.Update(t.conf)
+	if err != nil {
+		return err
+	}
+	t.regs = append(t.regs, r)
+	return nil
+}
+
+func (t *Tilde) UpdateReg(secret string, ip string) error {
+	index := slices.IndexFunc(t.regs, func(ele Registration) bool { return ele.HasSecret(secret) })
+	if index == -1 {
+		return errRegNotFound
+	}
+	reg, ok := t.regs[index].(*UserRegistration)
+	if !ok {
+		return errors.New("error getting user reg")
+	}
+	reg.ip = ip
+	return nil
+}
+
+func (t *Tilde) Sync(cnf config.Config) error {
+	for _, reg := range t.regs {
+		result, err := reg.Update(cnf)
+		if err != nil {
+			return err
+		}
+		if result != "" {
+			log.Info("updating registration", "subdomain", reg.Domain(), "ip", reg.IP())
+			dnsclient := gandi.NewLiveDNSClient(cnf)
+			log.Info("getting domain records")
+			curr, err := dnsclient.GetDomainRecordsByName(t.domain, reg.Domain())
+			if err != nil {
+				return fmt.Errorf("error getting domain records: %w", err)
+			}
+			if len(curr) == 0 {
+				log.Info("no records found for subdomain, not forcing creation", "subdomain", reg.Domain())
+			}
+			for _, v := range curr {
+				if v.RrsetType == "A" {
+					if slices.Contains(v.RrsetValues, reg.IP()) {
+						log.Info("not updating, already set", "host", reg.Domain(), "ip", reg.IP())
+					} else {
+						_, err := dnsclient.UpdateDomainRecordByNameAndType(t.domain, reg.Domain(), "A", 900, []string{reg.IP()})
+						if err != nil {
+							return fmt.Errorf("error updating record %w", err)
+						}
+						log.Info("updating domain successfully", "subdomain", reg.Domain())
+					}
+				}
+			}
+
+		}
+	}
+	return nil
+}
+
+func (watch *Tilde) server() http.Handler {
+	r := chi.NewRouter()
+	r.Use(middleware.Logger)
+	r.Post("/submit", func(w http.ResponseWriter, r *http.Request) {
+		var payload Request
+		err := json.NewDecoder(r.Body).Decode(&payload)
+		if err != nil {
+			log.Warn("error parsing ip submission", "error", err)
+			w.WriteHeader(http.StatusBadRequest)
+			return
+		}
+		err = watch.UpdateReg(payload.Secret, payload.IPAddr)
+		if err != nil {
+			if errors.Is(err, errRegNotFound) {
+				w.WriteHeader(http.StatusUnauthorized)
+			}
+			w.WriteHeader(http.StatusInternalServerError)
+			return
+		}
+		w.WriteHeader(http.StatusOK)
+	})
+	return r
+}
+
+func (watch *Tilde) run(ctx context.Context) error {
+	ticker := time.NewTicker(5 * time.Second)
+	for {
+		select {
+		case <-ticker.C:
+			err := watch.Sync(watch.conf)
+			if err != nil {
+				log.Warn(err)
+			}
+		case <-ctx.Done():
+			ticker.Stop()
+			return nil
+		}
+	}
+}

types.go

@@ -1,31 +1,11 @@
 package main
 
-import "github.com/go-gandi/go-gandi/config"
-
-type User struct {
-	Hostname string `yaml:"hostname"`
-	Secret   string `yaml:"secret"`
-}
-
 type Config struct {
-	Users []User `yaml:"users"`
+	Users []UserRegistration `yaml:"users"`
+	Hosts []HostRegistration `yaml:"hosts"`
 }
 
 type Request struct {
 	IPAddr string `json:"ipaddr"`
 	Secret string `json:"secret"`
 }
-
-type Registration struct {
-	IPAddr string
-	Domain string
-	Update bool
-}
-
-type Watch struct {
-	Tildes map[string]Registration
-	debug  bool
-
-	domain string
-	conf   config.Config
-}