jbergner
753893c836
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584 lines
15 KiB
Go
584 lines
15 KiB
Go
package main
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import (
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"bufio"
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"context"
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"encoding/json"
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"fmt"
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"io"
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"log"
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"net"
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"net/http"
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"net/netip"
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"os"
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"path/filepath"
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"strings"
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"sync"
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"time"
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"github.com/prometheus/client_golang/prometheus"
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"github.com/prometheus/client_golang/prometheus/promhttp"
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"github.com/redis/go-redis/v9"
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)
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// Redis + Context
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var ctx = context.Background()
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var rdb = redis.NewClient(&redis.Options{
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Addr: "redis:6379",
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})
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// ──────────────────────────────────────────────────────────────────────────────
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// Helpers
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// ──────────────────────────────────────────────────────────────────────────────
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// ExportListJSON schreibt die Map als prettified JSON‑Datei.
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func ExportListJSON(path string, m map[string]string) error {
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f, err := os.Create(path)
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if err != nil {
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return err
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}
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defer f.Close()
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enc := json.NewEncoder(f)
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enc.SetIndent("", " ")
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return enc.Encode(m)
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}
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// ImportListJSON liest eine JSON‑Datei und gibt map[string]string zurück.
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func ImportListJSON(path string) (map[string]string, error) {
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f, err := os.Open(path)
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if err != nil {
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return nil, err
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}
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defer f.Close()
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var m map[string]string
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if err := json.NewDecoder(f).Decode(&m); err != nil {
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return nil, err
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}
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return m, nil
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}
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// URLs der Blocklisten
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var blocklistURLs = map[string]string{
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"bitwire": "https://raw.githubusercontent.com/bitwire-it/ipblocklist/refs/heads/main/ip-list.txt",
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}
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// Präfix-Cache
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type prefixCacheEntry struct {
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prefixes []netip.Prefix
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expireAt time.Time
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}
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var (
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prefixCache = map[string]prefixCacheEntry{}
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prefixCacheMu sync.Mutex
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)
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// Prometheus Metriken
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var (
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checkRequests = prometheus.NewCounter(prometheus.CounterOpts{
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Name: "ipcheck_requests_total",
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Help: "Total IP check requests",
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})
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checkBlocked = prometheus.NewCounter(prometheus.CounterOpts{
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Name: "ipcheck_blocked_total",
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Help: "Total blocked IPs",
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})
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checkWhitelist = prometheus.NewCounter(prometheus.CounterOpts{
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Name: "ipcheck_whitelisted_total",
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Help: "Total whitelisted IPs",
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})
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blocklistHashSizes = prometheus.NewGaugeVec(
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prometheus.GaugeOpts{
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Name: "ipcheck_blocklist_hash_size",
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Help: "Number of entries in each category",
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},
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[]string{"category"},
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)
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)
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func init() {
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prometheus.MustRegister(checkRequests, checkBlocked, checkWhitelist, blocklistHashSizes)
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}
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// Main
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func main() {
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// Import Blocklisten
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if err := importBlocklists(); err != nil {
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fmt.Println("Blocklisten-Import FEHLGESCHLAGEN:", err)
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return
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}
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// Server
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http.HandleFunc("/", handleGUI)
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http.HandleFunc("/download/", handleDownload)
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http.HandleFunc("/whitelist", handleWhitelist)
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http.HandleFunc("/check/", handleCheck)
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http.HandleFunc("/traefik", handleTraefik)
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http.Handle("/metrics", promhttp.Handler())
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go func() {
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ticker := time.NewTicker(10 * time.Second)
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defer ticker.Stop()
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for {
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updateBlocklistMetrics()
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<-ticker.C
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}
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}()
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fmt.Println("Server läuft auf :8080")
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http.ListenAndServe(":8080", nil)
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}
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func updateBlocklistMetrics() {
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for cat := range blocklistURLs {
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key := "bl:" + cat
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count, err := rdb.HLen(ctx, key).Result()
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if err != nil {
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fmt.Printf("❌ Redis HLen Error for %s: %v\n", key, err)
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continue
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}
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blocklistHashSizes.WithLabelValues(cat).Set(float64(count))
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}
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}
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type target struct {
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Name, URL string
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}
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func fetchAndSave(client *http.Client, t target, outDir string) error {
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fileName := filepath.Base(t.URL)
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if fileName == "" {
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fileName = strings.ReplaceAll(strings.ToLower(strings.ReplaceAll(t.Name, " ", "_")), "..", "")
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}
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dst := filepath.Join(outDir, fileName)
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log.Printf("Downloading %-40s → %s", t.Name, dst)
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resp, err := client.Get(t.URL)
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if err != nil {
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return err
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}
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defer resp.Body.Close()
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if resp.StatusCode != http.StatusOK {
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return fmt.Errorf("bad HTTP status: %s", resp.Status)
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}
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tmp := dst + ".part"
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f, err := os.Create(tmp)
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if err != nil {
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return err
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}
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if _, err := io.Copy(f, resp.Body); err != nil {
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f.Close()
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os.Remove(tmp)
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return err
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}
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f.Close()
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return os.Rename(tmp, dst)
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}
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// Import-Logik
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func importBlocklists() error {
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client := &http.Client{Timeout: 60 * time.Second}
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t := target{Name: "Catalog", URL: "http://importer:8080/lists.json"}
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if err := os.MkdirAll("./lists/", 0o755); err != nil {
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fmt.Println("creating output dir", err)
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}
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if err := fetchAndSave(client, t, "./lists/"); err != nil {
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log.Printf("ERROR %s → %v", t.URL, err)
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}
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blocklistURLs, _ = ImportListJSON("./lists/lists.json")
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var wg sync.WaitGroup
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errCh := make(chan error, len(blocklistURLs))
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for cat, url := range blocklistURLs {
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wg.Add(1)
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go func(c, u string) {
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defer wg.Done()
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if err := importCategory(c, u); err != nil {
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errCh <- fmt.Errorf("%s: %v", c, err)
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}
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}(cat, url)
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}
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wg.Wait()
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close(errCh)
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for err := range errCh {
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fmt.Println("❌", err)
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}
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if len(errCh) > 0 {
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return fmt.Errorf("Blocklisten-Import teilweise fehlgeschlagen")
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}
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fmt.Println("✅ Blocklisten-Import abgeschlossen")
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fmt.Println(blocklistURLs)
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blocklistURLs["flodpod"] = "null"
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return nil
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}
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func importCategory(cat, url string) error {
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fmt.Printf("⬇️ Lade %s (%s)\n", cat, url)
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resp, err := http.Get(url)
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if err != nil {
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return fmt.Errorf("HTTP-Fehler: %v", err)
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}
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defer resp.Body.Close()
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if resp.StatusCode != 200 {
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return fmt.Errorf("HTTP %d", resp.StatusCode)
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}
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scanner := bufio.NewScanner(resp.Body)
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pipe := rdb.Pipeline()
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count, batchCount := 0, 0
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const batchSize = 500
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for scanner.Scan() {
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line := strings.TrimSpace(scanner.Text())
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if line == "" || strings.HasPrefix(line, "#") {
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continue
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}
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prefix, valid := normalizePrefix(line)
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if !valid {
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fmt.Printf("⚠️ Ungültig %s: %s\n", cat, line)
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continue
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}
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pipe.HSet(ctx, "bl:"+cat, prefix, 1)
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count++
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batchCount++
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if batchCount >= batchSize {
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if _, err := pipe.Exec(ctx); err != nil {
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return fmt.Errorf("Redis-Fehler: %v", err)
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}
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batchCount = 0
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}
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if count%1000 == 0 {
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fmt.Printf("📈 [%s] %d Einträge\n", cat, count)
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}
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}
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if err := scanner.Err(); err != nil {
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return fmt.Errorf("lesefehler: %v", err)
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}
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if batchCount > 0 {
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if _, err := pipe.Exec(ctx); err != nil {
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return fmt.Errorf("Redis-Fehler final: %v", err)
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}
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}
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fmt.Printf("✅ [%s] %d Einträge importiert\n", cat, count)
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return nil
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}
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func normalizePrefix(s string) (string, bool) {
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if !strings.Contains(s, "/") {
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ip := net.ParseIP(s)
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if ip == nil {
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return "", false
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}
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if ip.To4() != nil {
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s += "/32"
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} else {
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s += "/128"
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}
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}
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s = strings.TrimSpace(s)
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_, err := netip.ParsePrefix(s)
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return s, err == nil
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}
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func handleWhitelist(w http.ResponseWriter, r *http.Request) {
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if r.Method != http.MethodPost {
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http.Error(w, "method not allowed", http.StatusMethodNotAllowed)
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return
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}
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var body struct {
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IP string `json:"ip"`
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}
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if err := json.NewDecoder(r.Body).Decode(&body); err != nil {
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http.Error(w, "bad request", http.StatusBadRequest)
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return
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}
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addr, err := netip.ParseAddr(body.IP)
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if err != nil {
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http.Error(w, "invalid IP", http.StatusBadRequest)
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return
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}
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key := "wl:" + addr.String()
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if err := rdb.Set(ctx, key, "1", 0).Err(); err != nil {
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http.Error(w, "redis error", http.StatusInternalServerError)
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return
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}
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// Optional: Cache leeren für die IP
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prefixCacheMu.Lock()
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defer prefixCacheMu.Unlock()
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// Kein spezifischer IP-Cache in deinem Design, aber hier könnte man Cache invalidieren falls nötig
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writeJSON(w, map[string]string{
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"status": "whitelisted",
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"ip": addr.String(),
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})
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}
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// Check-Handler
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func handleCheck(w http.ResponseWriter, r *http.Request) {
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checkRequests.Inc()
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ipStr := strings.TrimPrefix(r.URL.Path, "/check/")
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ip, err := netip.ParseAddr(ipStr)
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if err != nil {
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http.Error(w, "invalid IP", http.StatusBadRequest)
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return
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}
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var cats []string
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for a, _ := range blocklistURLs {
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cats = append(cats, a)
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}
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//cats := []string{"firehol", "bitwire", "RU", "CN"}
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matches, err := checkIP(ip, cats)
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if err != nil {
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http.Error(w, "server error", http.StatusInternalServerError)
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return
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}
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if len(matches) > 0 {
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checkBlocked.Inc()
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} else {
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wl, _ := rdb.Exists(ctx, "wl:"+ip.String()).Result()
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if wl > 0 {
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checkWhitelist.Inc()
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}
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}
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writeJSON(w, map[string]any{
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"ip": ip.String(),
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"blocked": len(matches) > 0,
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"categories": matches,
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})
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}
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// Check-Handler
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func handleTraefik(w http.ResponseWriter, r *http.Request) {
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checkRequests.Inc()
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ipStr := r.Header.Get("X-Forwarded-For")
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if ipStr == "" {
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ipStr = r.RemoteAddr
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}
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ip, err := netip.ParseAddr(ipStr)
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if err != nil {
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http.Error(w, "invalid IP", http.StatusBadRequest)
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return
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}
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var cats []string
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for a, _ := range blocklistURLs {
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cats = append(cats, a)
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}
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//cats := []string{"firehol", "bitwire", "RU", "CN"}
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matches, err := checkIP(ip, cats)
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if err != nil {
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http.Error(w, "server error", http.StatusInternalServerError)
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return
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}
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if len(matches) > 0 {
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checkBlocked.Inc()
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} else {
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wl, _ := rdb.Exists(ctx, "wl:"+ip.String()).Result()
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if wl > 0 {
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checkWhitelist.Inc()
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}
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}
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if len(matches) > 0 {
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http.Error(w, "blocked", http.StatusForbidden)
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return
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}
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w.WriteHeader(http.StatusOK)
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}
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// Check-Logik
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func checkIP(ip netip.Addr, cats []string) ([]string, error) {
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wl, err := rdb.Exists(ctx, "wl:"+ip.String()).Result()
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||
if err != nil {
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||
return nil, err
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}
|
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if wl > 0 {
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return []string{}, nil
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}
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matches := []string{}
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for _, cat := range cats {
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prefixes, err := loadCategoryPrefixes(cat)
|
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if err != nil {
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||
return nil, err
|
||
}
|
||
for _, pfx := range prefixes {
|
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if pfx.Contains(ip) {
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fmt.Printf("💡 MATCH: %s in %s (%s)\n", ip, cat, pfx)
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matches = append(matches, cat)
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break
|
||
}
|
||
}
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||
}
|
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return matches, nil
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||
}
|
||
|
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func loadCategoryPrefixes(cat string) ([]netip.Prefix, error) {
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||
prefixCacheMu.Lock()
|
||
defer prefixCacheMu.Unlock()
|
||
entry, ok := prefixCache[cat]
|
||
if ok && time.Now().Before(entry.expireAt) {
|
||
return entry.prefixes, nil
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||
}
|
||
keys, err := rdb.HKeys(ctx, "bl:"+cat).Result()
|
||
if err != nil {
|
||
return nil, err
|
||
}
|
||
var prefixes []netip.Prefix
|
||
for _, k := range keys {
|
||
k = strings.TrimSpace(k)
|
||
pfx, err := netip.ParsePrefix(k)
|
||
if err == nil {
|
||
prefixes = append(prefixes, pfx)
|
||
} else {
|
||
fmt.Printf("⚠️ Ungültiger Redis-Prefix %s: %s\n", cat, k)
|
||
}
|
||
}
|
||
prefixCache[cat] = prefixCacheEntry{
|
||
prefixes: prefixes,
|
||
expireAt: time.Now().Add(1 * time.Second),
|
||
}
|
||
return prefixes, nil
|
||
}
|
||
|
||
// JSON-Helfer
|
||
func writeJSON(w http.ResponseWriter, v any) {
|
||
w.Header().Set("Content-Type", "application/json")
|
||
_ = json.NewEncoder(w).Encode(v)
|
||
}
|
||
|
||
func handleDownload(w http.ResponseWriter, r *http.Request) {
|
||
cat := strings.TrimPrefix(r.URL.Path, "/download/")
|
||
if cat == "" {
|
||
http.Error(w, "category missing", http.StatusBadRequest)
|
||
return
|
||
}
|
||
|
||
// Prüfen, ob Kategorie existiert
|
||
if _, ok := blocklistURLs[cat]; !ok {
|
||
http.Error(w, "unknown category", http.StatusNotFound)
|
||
return
|
||
}
|
||
|
||
// Alle Einträge holen
|
||
keys, err := rdb.HKeys(ctx, "bl:"+cat).Result()
|
||
if err != nil {
|
||
http.Error(w, "redis error", http.StatusInternalServerError)
|
||
return
|
||
}
|
||
|
||
// Header für Download setzen
|
||
w.Header().Set("Content-Type", "text/plain; charset=utf-8")
|
||
w.Header().Set("Content-Disposition", fmt.Sprintf("attachment; filename=\"%s.txt\"", cat))
|
||
|
||
// Zeilenweise schreiben
|
||
for _, k := range keys {
|
||
_, _ = fmt.Fprintln(w, k)
|
||
}
|
||
}
|
||
|
||
func handleGUI(w http.ResponseWriter, r *http.Request) {
|
||
html := `
|
||
<!DOCTYPE html>
|
||
<html lang="de">
|
||
<head>
|
||
<meta charset="UTF-8">
|
||
<title>IP Checker GUI</title>
|
||
<style>
|
||
body { font-family: sans-serif; max-width: 1000px; margin: auto; padding: 2em; background: #f9fafb; }
|
||
h1 { font-size: 1.5em; margin-bottom: 1em; }
|
||
input, button { padding: 0.7em; margin: 0.3em 0; width: 100%; border-radius: 0.4em; border: 1px solid #ccc; box-sizing: border-box; }
|
||
button { background: #2563eb; color: white; border: none; cursor: pointer; }
|
||
button:hover { background: #1d4ed8; }
|
||
#result, #metrics, #history { background: white; border: 1px solid #ddd; padding: 1em; border-radius: 0.4em; margin-top: 1em; white-space: pre-wrap; }
|
||
</style>
|
||
</head>
|
||
<body>
|
||
<h1>IP Checker + Whitelist GUI</h1>
|
||
<input id="ipInput" type="text" placeholder="Enter IP-Address...">
|
||
<button onclick="checkIP()">Check IP</button>
|
||
<button onclick="whitelistIP()">Whitelist IP</button>
|
||
|
||
<h2>Ergebnis</h2>
|
||
<div id="result">No Request</div>
|
||
|
||
<h2>Check History</h2>
|
||
<div id="history">No history</div>
|
||
|
||
<h2>Prometheus Metrics</h2>
|
||
<div id="metrics">Loading...</div>
|
||
|
||
|
||
|
||
<script>
|
||
async function checkIP() {
|
||
const ip = document.getElementById('ipInput').value.trim();
|
||
if (!ip) { alert("Please enter IP!"); return; }
|
||
const res = await fetch('/check/' + ip);
|
||
const data = await res.json();
|
||
document.getElementById('result').innerText = JSON.stringify(data, null, 2);
|
||
addHistory(ip, data);
|
||
}
|
||
|
||
async function whitelistIP() {
|
||
const ip = document.getElementById('ipInput').value.trim();
|
||
if (!ip) { alert("Please enter IP!"); return; }
|
||
const res = await fetch('/whitelist', {
|
||
method: 'POST',
|
||
headers: {'Content-Type': 'application/json'},
|
||
body: JSON.stringify({ip})
|
||
});
|
||
const data = await res.json();
|
||
document.getElementById('result').innerText = JSON.stringify(data, null, 2);
|
||
addHistory(ip, data);
|
||
}
|
||
|
||
function addHistory(ip, data) {
|
||
let history = JSON.parse(localStorage.getItem('ipHistory') || '[]');
|
||
history.unshift({ip, data, ts: new Date().toLocaleString()});
|
||
if (history.length > 10) history = history.slice(0, 10);
|
||
localStorage.setItem('ipHistory', JSON.stringify(history));
|
||
renderHistory();
|
||
}
|
||
|
||
function renderHistory() {
|
||
let history = JSON.parse(localStorage.getItem('ipHistory') || '[]');
|
||
if (history.length === 0) {
|
||
document.getElementById('history').innerText = 'Nothing checked yet';
|
||
return;
|
||
}
|
||
document.getElementById('history').innerText = history.map(e =>
|
||
e.ts + ": " + e.ip + " → blocked=" + (e.data.blocked ? "yes" : "no") +
|
||
(e.data.categories ? " [" + e.data.categories.join(", ") + "]" : "")
|
||
).join("\n");
|
||
}
|
||
|
||
async function loadMetrics() {
|
||
const res = await fetch('/metrics');
|
||
const text = await res.text();
|
||
const lines = text.split('\n').filter(l => l.includes('ipcheck_'));
|
||
document.getElementById('metrics').innerText = lines.join('\n') || 'No Data';
|
||
}
|
||
|
||
renderHistory();
|
||
setInterval(loadMetrics, 3000);
|
||
loadMetrics();
|
||
</script>
|
||
</body>
|
||
</html>
|
||
`
|
||
w.Header().Set("Content-Type", "text/html; charset=utf-8")
|
||
_, _ = w.Write([]byte(html))
|
||
}
|