chore: Initial commit

.env.example

@@ -0,0 +1,4 @@
+WORK_DIR=./.state/
+WATCH_DOMAINS=example.com
+NOTIFY_DISCORD_WEBHOOK=https://discord.com/api/webhooks/...
+NOTIFY_DISCORD_USER_ID=

.github/dependabot.yml

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+version: 2
+updates:
+  - package-ecosystem: "gomod"
+    directory: "/"
+    target-branch: "develop"
+    open-pull-requests-limit: 20
+    schedule:
+      interval: "daily"
+      time: "09:00"
+      timezone: "Europe/Berlin"
+  - package-ecosystem: "docker"
+    directory: "/"
+    target-branch: "develop"
+    open-pull-requests-limit: 20
+    schedule:
+      interval: "daily"
+      time: "09:00"
+      timezone: "Europe/Berlin"
+  - package-ecosystem: "github-actions"
+    directory: "/"
+    target-branch: "develop"
+    open-pull-requests-limit: 20
+    schedule:
+      interval: "daily"
+      time: "09:00"
+      timezone: "Europe/Berlin"

.github/workflows/docker.yml

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+name: Container Publish
+
+on:
+  push:
+    branches:
+      - "*"
+    tags:
+      - "*"
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v2
+
+      - name: Docker meta
+        id: meta
+        uses: docker/metadata-action@v3
+        with:
+          images: ghcr.io/${{ github.repository_owner }}/whois-watcher
+          tags: |
+            type=ref,event=branch
+            type=ref,event=pr
+            type=semver,pattern={{version}}
+            type=semver,pattern={{major}}.{{minor}},enable=${{ !startsWith(github.ref, 'refs/tags/0.0.') }}
+            type=semver,pattern={{major}},enable=${{ !startsWith(github.ref, 'refs/tags/0.') }}
+            type=raw,value=latest,enable=${{ github.ref == format('refs/heads/{0}', 'main') }}
+
+      - name: Login to GitHub Container Registry
+        uses: docker/login-action@v1
+        with:
+          registry: ghcr.io
+          username: ${{ github.repository_owner }}
+          password: ${{ github.token }}
+
+      - name: Build and push
+        uses: docker/build-push-action@v2
+        with:
+          context: ./
+          push: true
+          tags: ${{ steps.meta.outputs.tags }}
+          labels: ${{ steps.meta.outputs.labels }}

.gitignore

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+# Created by https://www.toptal.com/developers/gitignore/api/go,visualstudiocode,dotenv
+# Edit at https://www.toptal.com/developers/gitignore?templates=go,visualstudiocode,dotenv
+
+### dotenv ###
+.env
+
+### Go ###
+# If you prefer the allow list template instead of the deny list, see community template:
+# https://github.com/github/gitignore/blob/main/community/Golang/Go.AllowList.gitignore
+#
+# Binaries for programs and plugins
+*.exe
+*.exe~
+*.dll
+*.so
+*.dylib
+
+# Test binary, built with `go test -c`
+*.test
+
+# Output of the go coverage tool, specifically when used with LiteIDE
+*.out
+
+# Dependency directories (remove the comment below to include it)
+# vendor/
+
+# Go workspace file
+go.work
+
+### VisualStudioCode ###
+.vscode/*
+!.vscode/settings.json
+!.vscode/tasks.json
+!.vscode/launch.json
+!.vscode/extensions.json
+!.vscode/*.code-snippets
+
+# Local History for Visual Studio Code
+.history/
+
+# Built Visual Studio Code Extensions
+*.vsix
+
+### VisualStudioCode Patch ###
+# Ignore all local history of files
+.history
+.ionide
+
+# End of https://www.toptal.com/developers/gitignore/api/go,visualstudiocode,dotenv
+
+.state/

Dockerfile

@@ -0,0 +1,22 @@
+# Stage 1: Modules caching
+FROM golang:1.23 as modules
+COPY go.mod go.sum /modules/
+WORKDIR /modules
+RUN go mod download
+
+# Stage 2: Build
+FROM golang:1.23 as builder
+COPY --from=modules /go/pkg /go/pkg
+COPY . /workdir
+WORKDIR /workdir
+
+# Build your app
+RUN GOOS=linux GOARCH=amd64 go build -o /bin/whois-watcher
+
+# Stage 3: Final
+FROM ubuntu:jammy
+COPY --from=builder /go/bin/playwright /bin/whois-watcher /
+RUN apt-get update && apt-get install -y ca-certificates tzdata \
+    && rm -rf /var/lib/apt/lists/*
+
+CMD ["/whois-watcher"]

go.mod

@@ -0,0 +1,13 @@
+module github.com/nidotls/whois-watcher
+
+go 1.23.2
+
+require github.com/sirupsen/logrus v1.9.3
+
+require (
+	github.com/gtuk/discordwebhook v1.2.0 // indirect
+	github.com/joho/godotenv v1.5.1 // indirect
+	github.com/likexian/whois v1.15.5 // indirect
+	golang.org/x/net v0.30.0 // indirect
+	golang.org/x/sys v0.26.0 // indirect
+)

go.sum

@@ -0,0 +1,29 @@
+github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
+github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
+github.com/gtuk/discordwebhook v1.2.0 h1:7+gWPKSGyXjopu/6X9+oGbn0knTkDVXUM909+IXGZ/U=
+github.com/gtuk/discordwebhook v1.2.0/go.mod h1:U3LdXNJ1e0bx3MMe2a4mB1VBantPHOPly2jNd8ZWXec=
+github.com/joho/godotenv v1.5.1 h1:7eLL/+HRGLY0ldzfGMeQkb7vMd0as4CfYvUVzLqw0N0=
+github.com/joho/godotenv v1.5.1/go.mod h1:f4LDr5Voq0i2e/R5DDNOoa2zzDfwtkZa6DnEwAbqwq4=
+github.com/kr/pretty v0.1.0/go.mod h1:dAy3ld7l9f0ibDNOQOHHMYYIIbhfbHSm3C4ZsoJORNo=
+github.com/kr/pty v1.1.1/go.mod h1:pFQYn66WHrOpPYNljwOMqo10TkYh1fy3cYio2l3bCsQ=
+github.com/kr/text v0.1.0/go.mod h1:4Jbv+DJW3UT/LiOwJeYQe1efqtUx/iVham/4vfdArNI=
+github.com/likexian/whois v1.15.5 h1:gpPxyCTJtLtJDmakHCo//0ZjK/ocI01GCAd/WBJ2oH8=
+github.com/likexian/whois v1.15.5/go.mod h1:4b6o1QTCfjwrB5I3KeNQnn79QtuPUTsewsE+ys94I78=
+github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
+github.com/sergi/go-diff v1.3.1 h1:xkr+Oxo4BOQKmkn/B9eMK0g5Kg/983T9DqqPHwYqD+8=
+github.com/sergi/go-diff v1.3.1/go.mod h1:aMJSSKb2lpPvRNec0+w3fl7LP9IOFzdc9Pa4NFbPK1I=
+github.com/sirupsen/logrus v1.9.3 h1:dueUQJ1C2q9oE3F7wvmSGAaVtTmUizReu6fjN8uqzbQ=
+github.com/sirupsen/logrus v1.9.3/go.mod h1:naHLuLoDiP4jHNo9R0sCBMtWGeIprob74mVsIT4qYEQ=
+github.com/stretchr/objx v0.1.0/go.mod h1:HFkY916IF+rwdDfMAkV7OtwuqBVzrE8GR6GFx+wExME=
+github.com/stretchr/testify v1.4.0/go.mod h1:j7eGeouHqKxXV5pUuKE4zz7dFj8WfuZ+81PSLYec5m4=
+github.com/stretchr/testify v1.7.0/go.mod h1:6Fq8oRcR53rry900zMqJjRRixrwX3KX962/h/Wwjteg=
+golang.org/x/net v0.30.0 h1:AcW1SDZMkb8IpzCdQUaIq2sP4sZ4zw+55h6ynffypl4=
+golang.org/x/net v0.30.0/go.mod h1:2wGyMJ5iFasEhkwi13ChkO/t1ECNC4X4eBKkVFyYFlU=
+golang.org/x/sys v0.0.0-20220715151400-c0bba94af5f8/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
+golang.org/x/sys v0.26.0 h1:KHjCJyddX0LoSTb3J+vWpupP9p0oznkqVk/IfjymZbo=
+golang.org/x/sys v0.26.0/go.mod h1:/VUhepiaJMQUp4+oa/7Zr1D23ma6VTLIYjOOTFZPUcA=
+gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
+gopkg.in/check.v1 v1.0.0-20190902080502-41f04d3bba15/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
+gopkg.in/yaml.v2 v2.2.2/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
+gopkg.in/yaml.v2 v2.4.0/go.mod h1:RDklbk79AGWmwhnvt/jBztapEOGDOx6ZbXqjP6csGnQ=
+gopkg.in/yaml.v3 v3.0.0-20200313102051-9f266ea9e77c/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=

main.go

@@ -0,0 +1,153 @@
+package main
+
+import (
+	"errors"
+	"fmt"
+	"os"
+	"os/exec"
+	"path"
+	"strings"
+	"time"
+
+	"github.com/gtuk/discordwebhook"
+	"github.com/joho/godotenv"
+	"github.com/likexian/whois"
+	"github.com/sirupsen/logrus"
+)
+
+func main() {
+	_ = godotenv.Load()
+
+	workDir := os.Getenv("WORK_DIR")
+	if workDir == "" {
+		workDir = "/tmp/whois-watch"
+	}
+	domains := strings.Split(os.Getenv("WATCH_DOMAINS"), " ")
+
+	err := os.MkdirAll(workDir, 0755)
+	if err != nil {
+		logrus.Fatalf("create work dir error: %v", err)
+	}
+	err = os.MkdirAll(path.Join(workDir, "history"), 0755)
+	if err != nil {
+		logrus.Fatalf("create history work dir error: %v", err)
+	}
+
+	for {
+		run(workDir, domains)
+
+		time.Sleep(12 * time.Hour)
+	}
+}
+
+func run(workDir string, domains []string) {
+	for _, domain := range domains {
+		log := logrus.WithField("domain", domain)
+
+		result := whoisDomain(domain)
+
+		file, err := os.ReadFile(path.Join(workDir, fmt.Sprintf("%s.txt", domain)))
+		if err != nil {
+			if errors.Is(err, os.ErrNotExist) {
+				log.Infof("file not exist, create new file")
+			} else {
+				log.Errorf("read file error: %v", err)
+			}
+
+			err = os.WriteFile(path.Join(workDir, fmt.Sprintf("%s.txt", domain)), []byte(result), 0644)
+			if err != nil {
+				log.Errorf("write file error: %v", err)
+				continue
+			}
+			continue
+		}
+
+		err = os.WriteFile(path.Join(workDir, fmt.Sprintf("%s.txt", domain)), []byte(result), 0644)
+		if err != nil {
+			log.Errorf("write file error: %v", err)
+			continue
+		}
+
+		diff, err := diffLineByLine(string(file), result)
+		if err != nil {
+			log.Errorf("diff error: %v", err)
+			continue
+		}
+
+		if len(diff) == 0 {
+			log.Infof("whois result is same as before")
+			continue
+		}
+
+		log.Infof("whois result is different from before:")
+		for _, line := range strings.Split(diff, "\n") {
+			log.Infof("   %s", line)
+		}
+
+		content := "# Domain `" + domain + "` has been changed"
+		if os.Getenv("NOTIFY_DISCORD_USER_ID") != "" {
+			content += "\n\n<@" + os.Getenv("NOTIFY_DISCORD_USER_ID") + ">"
+		}
+		content += "\n\n```diff\n" + diff + "```"
+		message := discordwebhook.Message{
+			Content: &content,
+		}
+
+		err = discordwebhook.SendMessage(os.Getenv("NOTIFY_DISCORD_WEBHOOK"), message)
+		if err != nil {
+			log.Fatal(err)
+		}
+
+		err = os.WriteFile(path.Join(workDir, "history", fmt.Sprintf("%s.%d.diff", domain, time.Now().Unix())), []byte(diff), 0644)
+		if err != nil {
+			log.Errorf("write diff file error: %v", err)
+			continue
+		}
+	}
+}
+
+func diffLineByLine(from, to string) (string, error) {
+	workDir, err := os.MkdirTemp("", "diff")
+	defer os.RemoveAll(workDir)
+	if err != nil {
+		return "", err
+	}
+
+	fromFile := path.Join(workDir, "from.txt")
+	toFile := path.Join(workDir, "to.txt")
+
+	err = os.WriteFile(fromFile, []byte(from), 0644)
+	if err != nil {
+		return "", err
+	}
+	err = os.WriteFile(toFile, []byte(to), 0644)
+	if err != nil {
+		return "", err
+	}
+
+	cmd := exec.Command("diff", fromFile, toFile)
+	out, err := cmd.Output()
+	if err != nil && cmd.ProcessState.ExitCode() != 1 {
+		return "", err
+	}
+
+	return string(out), nil
+}
+
+func whoisDomain(domain string) string {
+	result, err := whois.Whois(domain)
+	if err != nil {
+		return err.Error()
+	}
+
+	lines := strings.Split(result, "\n")
+	result = ""
+	for _, line := range lines {
+		if strings.HasPrefix(line, "%") || strings.HasPrefix(line, ">>>") {
+			continue
+		}
+		result += line + "\n"
+	}
+
+	return result
+}