795 lines
23 KiB
Go
795 lines
23 KiB
Go
package main
|
||
|
||
import (
|
||
"bufio"
|
||
"context"
|
||
"encoding/json"
|
||
"fmt"
|
||
"io"
|
||
"log"
|
||
"net"
|
||
"net/http"
|
||
"net/netip"
|
||
"os"
|
||
"path/filepath"
|
||
"strings"
|
||
"sync"
|
||
"time"
|
||
|
||
"github.com/prometheus/client_golang/prometheus"
|
||
"github.com/prometheus/client_golang/prometheus/promhttp"
|
||
"github.com/redis/go-redis/v9"
|
||
)
|
||
|
||
// Redis + Context
|
||
var ctx = context.Background()
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||
|
||
// ──────────────────────────────────────────────────────────────────────────────
|
||
// Helpers
|
||
// ──────────────────────────────────────────────────────────────────────────────
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||
// ExportListJSON schreibt die Map als prettified JSON‑Datei.
|
||
func ExportListJSON(path string, m map[string]string) error {
|
||
f, err := os.Create(path)
|
||
if err != nil {
|
||
return err
|
||
}
|
||
defer f.Close()
|
||
enc := json.NewEncoder(f)
|
||
enc.SetIndent("", " ")
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||
return enc.Encode(m)
|
||
}
|
||
|
||
// ImportListJSON liest eine JSON‑Datei und gibt map[string]string zurück.
|
||
func ImportListJSON(path string) (map[string]string, error) {
|
||
f, err := os.Open(path)
|
||
if err != nil {
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||
return nil, err
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||
}
|
||
defer f.Close()
|
||
var m map[string]string
|
||
if err := json.NewDecoder(f).Decode(&m); err != nil {
|
||
return nil, err
|
||
}
|
||
return m, nil
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||
}
|
||
|
||
// URLs der Blocklisten
|
||
var blocklistURLs = map[string]string{
|
||
"bitwire": "https://raw.githubusercontent.com/bitwire-it/ipblocklist/refs/heads/main/ip-list.txt",
|
||
}
|
||
|
||
// Präfix-Cache
|
||
type prefixCacheEntry struct {
|
||
prefixes []netip.Prefix
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||
expireAt time.Time
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||
}
|
||
|
||
var (
|
||
prefixCache = map[string]prefixCacheEntry{}
|
||
prefixCacheMu sync.RWMutex
|
||
)
|
||
|
||
// Prometheus Metriken
|
||
var (
|
||
checkRequests = prometheus.NewCounter(prometheus.CounterOpts{
|
||
Name: "ipcheck_requests_total",
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||
Help: "Total IP check requests",
|
||
})
|
||
checkBlocked = prometheus.NewCounter(prometheus.CounterOpts{
|
||
Name: "ipcheck_blocked_total",
|
||
Help: "Total blocked IPs",
|
||
})
|
||
checkWhitelist = prometheus.NewCounter(prometheus.CounterOpts{
|
||
Name: "ipcheck_whitelisted_total",
|
||
Help: "Total whitelisted IPs",
|
||
})
|
||
blocklistHashSizes = prometheus.NewGaugeVec(
|
||
prometheus.GaugeOpts{
|
||
Name: "ipcheck_blocklist_hash_size",
|
||
Help: "Number of entries in each category",
|
||
},
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||
[]string{"category"},
|
||
)
|
||
)
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||
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||
func init() {
|
||
prometheus.MustRegister(checkRequests, checkBlocked, checkWhitelist, blocklistHashSizes)
|
||
}
|
||
|
||
// Main
|
||
func main() {
|
||
// Import Blocklisten
|
||
if err := importBlocklists(); err != nil {
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||
fmt.Println("Blocklisten-Import FEHLGESCHLAGEN:", err)
|
||
return
|
||
}
|
||
|
||
// Server
|
||
http.HandleFunc("/", handleGUI)
|
||
http.HandleFunc("/download/", handleDownload)
|
||
http.HandleFunc("/whitelist", handleWhitelist)
|
||
http.HandleFunc("/check/", handleCheck)
|
||
http.HandleFunc("/traefik", handleTraefik)
|
||
http.Handle("/metrics", promhttp.Handler())
|
||
|
||
go func() {
|
||
ticker := time.NewTicker(10 * time.Second)
|
||
defer ticker.Stop()
|
||
for {
|
||
updateBlocklistMetrics()
|
||
<-ticker.C
|
||
}
|
||
}()
|
||
|
||
fmt.Println("Server läuft auf :8080")
|
||
http.ListenAndServe(":8080", nil)
|
||
}
|
||
|
||
func clientIPFromHeaders(r *http.Request) (netip.Addr, error) {
|
||
if xff := r.Header.Get("X-Forwarded-For"); xff != "" {
|
||
parts := strings.Split(xff, ",")
|
||
s := strings.TrimSpace(parts[0])
|
||
if a, err := netip.ParseAddr(s); err == nil {
|
||
return a.Unmap(), nil
|
||
}
|
||
}
|
||
if xr := r.Header.Get("X-Real-Ip"); xr != "" {
|
||
if a, err := netip.ParseAddr(strings.TrimSpace(xr)); err == nil {
|
||
return a.Unmap(), nil
|
||
}
|
||
}
|
||
host, _, err := net.SplitHostPort(r.RemoteAddr)
|
||
if err == nil {
|
||
if a, err := netip.ParseAddr(host); err == nil {
|
||
return a.Unmap(), nil
|
||
}
|
||
}
|
||
return netip.Addr{}, fmt.Errorf("cannot determine client ip")
|
||
}
|
||
|
||
func updateBlocklistMetrics() {
|
||
var rdb = redis.NewClient(&redis.Options{
|
||
Addr: os.Getenv("REDIS_ADDR"),
|
||
DB: 0,
|
||
Username: os.Getenv("REDIS_USER"),
|
||
Password: os.Getenv("REDIS_PASS"),
|
||
})
|
||
for cat := range blocklistURLs {
|
||
key := "bl:" + cat
|
||
count, err := rdb.HLen(ctx, key).Result()
|
||
if err != nil {
|
||
fmt.Printf("❌ Redis HLen Error for %s: %v\n", key, err)
|
||
continue
|
||
}
|
||
blocklistHashSizes.WithLabelValues(cat).Set(float64(count))
|
||
}
|
||
}
|
||
|
||
type target struct {
|
||
Name, URL string
|
||
}
|
||
|
||
func fetchAndSave(client *http.Client, t target, outDir string) error {
|
||
fileName := filepath.Base(t.URL)
|
||
if fileName == "" {
|
||
fileName = strings.ReplaceAll(strings.ToLower(strings.ReplaceAll(t.Name, " ", "_")), "..", "")
|
||
}
|
||
dst := filepath.Join(outDir, fileName)
|
||
|
||
log.Printf("Downloading %-40s → %s", t.Name, dst)
|
||
resp, err := client.Get(t.URL)
|
||
if err != nil {
|
||
return err
|
||
}
|
||
defer resp.Body.Close()
|
||
|
||
if resp.StatusCode != http.StatusOK {
|
||
return fmt.Errorf("bad HTTP status: %s", resp.Status)
|
||
}
|
||
|
||
tmp := dst + ".part"
|
||
f, err := os.Create(tmp)
|
||
if err != nil {
|
||
return err
|
||
}
|
||
if _, err := io.Copy(f, resp.Body); err != nil {
|
||
f.Close()
|
||
os.Remove(tmp)
|
||
return err
|
||
}
|
||
f.Close()
|
||
return os.Rename(tmp, dst)
|
||
}
|
||
|
||
// Import-Logik
|
||
func importBlocklists() error {
|
||
client := &http.Client{Timeout: 60 * time.Second}
|
||
t := target{Name: "Catalog", URL: os.Getenv("FLOD_IMPORT_URL") + "/lists.json"}
|
||
if err := os.MkdirAll("./lists/", 0o755); err != nil {
|
||
fmt.Println("creating output dir", err)
|
||
}
|
||
if err := fetchAndSave(client, t, "./lists/"); err != nil {
|
||
log.Printf("ERROR %s → %v", t.URL, err)
|
||
}
|
||
blocklistURLs, _ = ImportListJSON("./lists/lists.json")
|
||
|
||
var wg sync.WaitGroup
|
||
errCh := make(chan error, len(blocklistURLs))
|
||
|
||
for cat, url := range blocklistURLs {
|
||
wg.Add(1)
|
||
go func(c, u string) {
|
||
defer wg.Done()
|
||
if err := importCategory(c, u); err != nil {
|
||
errCh <- fmt.Errorf("%s: %v", c, err)
|
||
}
|
||
}(cat, url)
|
||
}
|
||
|
||
wg.Wait()
|
||
close(errCh)
|
||
|
||
for err := range errCh {
|
||
fmt.Println("❌", err)
|
||
}
|
||
|
||
if len(errCh) > 0 {
|
||
return fmt.Errorf("Blocklisten-Import teilweise fehlgeschlagen")
|
||
}
|
||
fmt.Println("✅ Blocklisten-Import abgeschlossen")
|
||
fmt.Println(blocklistURLs)
|
||
blocklistURLs["flodpod"] = "null"
|
||
return nil
|
||
}
|
||
|
||
func importCategory(cat, url string) error {
|
||
var rdb = redis.NewClient(&redis.Options{
|
||
Addr: os.Getenv("REDIS_ADDR"),
|
||
DB: 0,
|
||
Username: os.Getenv("REDIS_USER"),
|
||
Password: os.Getenv("REDIS_PASS"),
|
||
})
|
||
fmt.Printf("⬇️ Lade %s (%s)\n", cat, url)
|
||
resp, err := http.Get(url)
|
||
if err != nil {
|
||
return fmt.Errorf("HTTP-Fehler: %v", err)
|
||
}
|
||
defer resp.Body.Close()
|
||
|
||
if resp.StatusCode != 200 {
|
||
return fmt.Errorf("HTTP %d", resp.StatusCode)
|
||
}
|
||
|
||
scanner := bufio.NewScanner(resp.Body)
|
||
pipe := rdb.Pipeline()
|
||
count, batchCount := 0, 0
|
||
const batchSize = 500
|
||
|
||
for scanner.Scan() {
|
||
line := strings.TrimSpace(scanner.Text())
|
||
if line == "" || strings.HasPrefix(line, "#") {
|
||
continue
|
||
}
|
||
prefix, valid := normalizePrefix(line)
|
||
if !valid {
|
||
fmt.Printf("⚠️ Ungültig %s: %s\n", cat, line)
|
||
continue
|
||
}
|
||
pipe.HSet(ctx, "bl:"+cat, prefix, 1)
|
||
count++
|
||
batchCount++
|
||
if batchCount >= batchSize {
|
||
if _, err := pipe.Exec(ctx); err != nil {
|
||
return fmt.Errorf("Redis-Fehler: %v", err)
|
||
}
|
||
batchCount = 0
|
||
}
|
||
if count%1000 == 0 {
|
||
fmt.Printf("📈 [%s] %d Einträge\n", cat, count)
|
||
}
|
||
}
|
||
if err := scanner.Err(); err != nil {
|
||
return fmt.Errorf("lesefehler: %v", err)
|
||
}
|
||
if batchCount > 0 {
|
||
if _, err := pipe.Exec(ctx); err != nil {
|
||
return fmt.Errorf("Redis-Fehler final: %v", err)
|
||
}
|
||
}
|
||
fmt.Printf("✅ [%s] %d Einträge importiert\n", cat, count)
|
||
return nil
|
||
}
|
||
|
||
func normalizePrefix(s string) (string, bool) {
|
||
if !strings.Contains(s, "/") {
|
||
ip := net.ParseIP(s)
|
||
if ip == nil {
|
||
return "", false
|
||
}
|
||
if ip.To4() != nil {
|
||
s += "/32"
|
||
} else {
|
||
s += "/128"
|
||
}
|
||
}
|
||
s = strings.TrimSpace(s)
|
||
_, err := netip.ParsePrefix(s)
|
||
return s, err == nil
|
||
}
|
||
|
||
func handleWhitelist(w http.ResponseWriter, r *http.Request) {
|
||
var rdb = redis.NewClient(&redis.Options{
|
||
Addr: os.Getenv("REDIS_ADDR"),
|
||
DB: 0,
|
||
Username: os.Getenv("REDIS_USER"),
|
||
Password: os.Getenv("REDIS_PASS"),
|
||
})
|
||
if r.Method != http.MethodPost {
|
||
http.Error(w, "method not allowed", http.StatusMethodNotAllowed)
|
||
return
|
||
}
|
||
|
||
var body struct {
|
||
IP string `json:"ip"`
|
||
}
|
||
if err := json.NewDecoder(r.Body).Decode(&body); err != nil {
|
||
http.Error(w, "bad request", http.StatusBadRequest)
|
||
return
|
||
}
|
||
|
||
addr, err := netip.ParseAddr(body.IP)
|
||
if err != nil {
|
||
http.Error(w, "invalid IP", http.StatusBadRequest)
|
||
return
|
||
}
|
||
|
||
key := "wl:" + addr.String()
|
||
if err := rdb.Set(ctx, key, "1", 0).Err(); err != nil {
|
||
http.Error(w, "redis error", http.StatusInternalServerError)
|
||
return
|
||
}
|
||
|
||
// Optional: Cache leeren für die IP
|
||
prefixCacheMu.Lock()
|
||
defer prefixCacheMu.Unlock()
|
||
// Kein spezifischer IP-Cache in deinem Design, aber hier könnte man Cache invalidieren falls nötig
|
||
|
||
writeJSON(w, map[string]string{
|
||
"status": "whitelisted",
|
||
"ip": addr.String(),
|
||
})
|
||
}
|
||
|
||
// Check-Handler
|
||
func handleCheck(w http.ResponseWriter, r *http.Request) {
|
||
var rdb = redis.NewClient(&redis.Options{
|
||
Addr: os.Getenv("REDIS_ADDR"),
|
||
DB: 0,
|
||
Username: os.Getenv("REDIS_USER"),
|
||
Password: os.Getenv("REDIS_PASS"),
|
||
})
|
||
checkRequests.Inc()
|
||
ipStr := strings.TrimPrefix(r.URL.Path, "/check/")
|
||
ip, err := netip.ParseAddr(ipStr)
|
||
if err != nil {
|
||
http.Error(w, "invalid IP", http.StatusBadRequest)
|
||
return
|
||
}
|
||
|
||
var cats []string
|
||
for a := range blocklistURLs {
|
||
cats = append(cats, a)
|
||
}
|
||
|
||
//cats := []string{"firehol", "bitwire", "RU", "CN"}
|
||
matches, err := checkIP(ip, cats)
|
||
if err != nil {
|
||
http.Error(w, "server error", http.StatusInternalServerError)
|
||
return
|
||
}
|
||
if len(matches) > 0 {
|
||
checkBlocked.Inc()
|
||
} else {
|
||
wl, _ := rdb.Exists(ctx, "wl:"+ip.String()).Result()
|
||
if wl > 0 {
|
||
checkWhitelist.Inc()
|
||
}
|
||
}
|
||
writeJSON(w, map[string]any{
|
||
"ip": ip.String(),
|
||
"blocked": len(matches) > 0,
|
||
"categories": matches,
|
||
})
|
||
}
|
||
|
||
// Check-Handler
|
||
func handleTraefik(w http.ResponseWriter, r *http.Request) {
|
||
rdb := redis.NewClient(&redis.Options{
|
||
Addr: os.Getenv("REDIS_ADDR"),
|
||
DB: 0,
|
||
Username: os.Getenv("REDIS_USER"),
|
||
Password: os.Getenv("REDIS_PASS"),
|
||
})
|
||
|
||
checkRequests.Inc()
|
||
|
||
ip, err := clientIPFromHeaders(r)
|
||
if err != nil {
|
||
http.Error(w, "invalid IP", http.StatusBadRequest)
|
||
return
|
||
}
|
||
|
||
// Kategorien dynamisch aus blocklistURLs
|
||
cats := make([]string, 0, len(blocklistURLs))
|
||
for c := range blocklistURLs {
|
||
cats = append(cats, c)
|
||
}
|
||
|
||
matches, err := checkIP(ip, cats)
|
||
if err != nil {
|
||
http.Error(w, "server error", http.StatusInternalServerError)
|
||
return
|
||
}
|
||
|
||
// Whitelist check (wie gehabt)
|
||
if len(matches) == 0 {
|
||
wl, _ := rdb.Exists(ctx, "wl:"+ip.String()).Result()
|
||
if wl > 0 {
|
||
checkWhitelist.Inc()
|
||
}
|
||
}
|
||
|
||
if len(matches) > 0 {
|
||
checkBlocked.Inc()
|
||
errorhtml(w, r)
|
||
//http.Error(w, "blocked", http.StatusTooManyRequests)
|
||
return
|
||
}
|
||
w.WriteHeader(http.StatusOK)
|
||
_, _ = w.Write([]byte("OK"))
|
||
}
|
||
|
||
// Check-Logik
|
||
func checkIP(ip netip.Addr, cats []string) ([]string, error) {
|
||
var rdb = redis.NewClient(&redis.Options{
|
||
Addr: os.Getenv("REDIS_ADDR"),
|
||
DB: 0,
|
||
Username: os.Getenv("REDIS_USER"),
|
||
Password: os.Getenv("REDIS_PASS"),
|
||
})
|
||
wl, err := rdb.Exists(ctx, "wl:"+ip.String()).Result()
|
||
if err != nil {
|
||
return nil, err
|
||
}
|
||
if wl > 0 {
|
||
return []string{}, nil
|
||
}
|
||
matches := []string{}
|
||
for _, cat := range cats {
|
||
prefixes, err := loadCategoryPrefixes(cat)
|
||
if err != nil {
|
||
return nil, err
|
||
}
|
||
for _, pfx := range prefixes {
|
||
if pfx.Contains(ip) {
|
||
fmt.Printf("💡 MATCH: %s in %s (%s)\n", ip, cat, pfx)
|
||
matches = append(matches, cat)
|
||
break
|
||
}
|
||
}
|
||
}
|
||
return matches, nil
|
||
}
|
||
|
||
func loadCategoryPrefixes(cat string) ([]netip.Prefix, error) {
|
||
var rdb = redis.NewClient(&redis.Options{
|
||
Addr: os.Getenv("REDIS_ADDR"),
|
||
DB: 0,
|
||
Username: os.Getenv("REDIS_USER"),
|
||
Password: os.Getenv("REDIS_PASS"),
|
||
})
|
||
prefixCacheMu.Lock()
|
||
defer prefixCacheMu.Unlock()
|
||
entry, ok := prefixCache[cat]
|
||
if ok && time.Now().Before(entry.expireAt) {
|
||
return entry.prefixes, nil
|
||
}
|
||
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(10 * time.Minute),
|
||
//Hier geändert von 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) {
|
||
var rdb = redis.NewClient(&redis.Options{
|
||
Addr: os.Getenv("REDIS_ADDR"),
|
||
DB: 0,
|
||
Username: os.Getenv("REDIS_USER"),
|
||
Password: os.Getenv("REDIS_PASS"),
|
||
})
|
||
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))
|
||
}
|
||
|
||
func errorhtml(w http.ResponseWriter, r *http.Request) {
|
||
html := `<!doctype html>
|
||
<html lang="de">
|
||
<head>
|
||
<meta charset="utf-8" />
|
||
<meta name="viewport" content="width=device-width, initial-scale=1" />
|
||
<title>Webserver ist nicht erreichbar - Fehler 521</title>
|
||
<style>
|
||
:root{
|
||
--bg:#f6f7f9;--text:#1f2937;--muted:#6b7280;--card:#ffffff;
|
||
--success:#22c55e;--danger:#ef4444;--accent:#2563eb;--border:#e5e7eb;
|
||
}
|
||
*{box-sizing:border-box}
|
||
html,body{height:100%}
|
||
body{margin:0;background:var(--bg);color:var(--text);font:16px/1.5 system-ui,-apple-system,Segoe UI,Roboto,Ubuntu,"Helvetica Neue",Arial}
|
||
.wrap{max-width:980px;margin:0 auto;padding:40px 16px 64px}
|
||
header{display:flex;align-items:center;gap:12px;flex-wrap:wrap;}
|
||
h1{font-size:clamp(24px,4vw,38px);font-weight:700;margin:0}
|
||
.pill{display:inline-flex;align-items:center;gap:8px;padding:6px 10px;border-radius:999px;border:1px solid var(--border);background:#fff;font-weight:600;font-size:14px;color:#111}
|
||
.pill small{font-weight:500;color:var(--muted)}
|
||
p.lead{margin:12px 0 24px;color:var(--muted)}
|
||
|
||
.grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:18px;margin-top:16px}
|
||
.node{background:var(--card);border:1px solid var(--border);border-radius:14px;padding:18px;display:flex;flex-direction:column;align-items:center;gap:10px;box-shadow:0 6px 18px rgba(0,0,0,.04)}
|
||
.icon{position:relative;width:104px;height:80px;display:grid;place-items:center}
|
||
.status{position:absolute;right:-8px;bottom:-8px;width:30px;height:30px;border-radius:999px;display:grid;place-items:center;color:#fff;font-weight:800;font-size:14px}
|
||
.status.ok{background:var(--success)}
|
||
.status.err{background:var(--danger)}
|
||
.node h3{margin:6px 0 0;font-size:16px}
|
||
.node .sub{margin:0;color:var(--muted);font-size:14px}
|
||
.node .state{margin:4px 0 0;font-weight:700}
|
||
.state.ok{color:var(--success)}
|
||
.state.err{color:var(--danger)}
|
||
|
||
.actions{margin-top:28px;display:flex;gap:12px;flex-wrap:wrap}
|
||
.btn{border:1px solid var(--border);background:#fff;font-weight:600;padding:10px 14px;border-radius:10px;cursor:pointer}
|
||
.btn.primary{background:var(--accent);border-color:var(--accent);color:#fff}
|
||
.meta{margin-top:24px;color:var(--muted);font-size:13px}
|
||
footer{margin-top:40px;color:var(--muted);font-size:13px}
|
||
|
||
/* Simple, friendly SVG look */
|
||
svg{display:block}
|
||
.dim{fill:#e5e7eb}
|
||
.stroke{stroke:#9ca3af}
|
||
</style>
|
||
</head>
|
||
<body>
|
||
<div class="wrap">
|
||
<header>
|
||
<h1>Webserver ist nicht erreichbar</h1>
|
||
<span class="pill">Fehlercode 521 <small>(Origin Server verweigert Verbindung)</small></span>
|
||
</header>
|
||
<p class="lead">
|
||
Dein Browser funktioniert, der Edge-Proxy ist erreichbar - aber der Origin-Server antwortet nicht oder die Verbindung wird verweigert.
|
||
</p>
|
||
|
||
<section class="grid" aria-label="Diagnose-Kette">
|
||
<!-- You / Browser -->
|
||
<article class="node" aria-label="Browser Status">
|
||
<div class="icon" aria-hidden="true">
|
||
<!-- Browser icon -->
|
||
<svg width="88" height="62" viewBox="0 0 88 62" xmlns="http://www.w3.org/2000/svg" role="img">
|
||
<rect x="1" y="6" width="86" height="55" rx="8" fill="#fff" stroke="#d1d5db"/>
|
||
<rect x="1" y="1" width="86" height="14" rx="8" fill="#f3f4f6" stroke="#d1d5db"/>
|
||
<circle cx="10" cy="8" r="2.5" fill="#ef4444"/>
|
||
<circle cx="18" cy="8" r="2.5" fill="#f59e0b"/>
|
||
<circle cx="26" cy="8" r="2.5" fill="#22c55e"/>
|
||
</svg>
|
||
<div class="status ok" title="Funktioniert">✓</div>
|
||
</div>
|
||
<h3>Du</h3>
|
||
<p class="sub">Browser</p>
|
||
<p class="state ok">Funktioniert</p>
|
||
</article>
|
||
|
||
<!-- Edge / Proxy -->
|
||
<article class="node" aria-label="Edge/Proxy Status">
|
||
<div class="icon" aria-hidden="true">
|
||
<!-- Cloud icon -->
|
||
<svg width="96" height="64" viewBox="0 0 96 64" xmlns="http://www.w3.org/2000/svg" role="img">
|
||
<path d="M33 44h32a14 14 0 0 0 0-28 18 18 0 0 0-34-5 16 16 0 0 0-4 31z" fill="#e5e7eb" stroke="#d1d5db"/>
|
||
</svg>
|
||
<div class="status ok" title="Funktioniert">✓</div>
|
||
</div>
|
||
<h3>Edge-Proxy</h3>
|
||
<p class="sub">Zwischenschicht</p>
|
||
<p class="state ok">Funktioniert</p>
|
||
</article>
|
||
|
||
<!-- Host / Origin -->
|
||
<article class="node" aria-label="Origin/Host Status">
|
||
<div class="icon" aria-hidden="true">
|
||
<!-- Server icon -->
|
||
<svg width="88" height="62" viewBox="0 0 88 62" xmlns="http://www.w3.org/2000/svg" role="img">
|
||
<rect x="6" y="10" width="76" height="18" rx="4" fill="#f3f4f6" stroke="#d1d5db"/>
|
||
<circle cx="16" cy="19" r="3" fill="#9ca3af"/>
|
||
<rect x="6" y="34" width="76" height="18" rx="4" fill="#f3f4f6" stroke="#d1d5db"/>
|
||
<circle cx="16" cy="43" r="3" fill="#9ca3af"/>
|
||
</svg>
|
||
<div class="status err" title="Fehler">✕</div>
|
||
</div>
|
||
<h3>Host</h3>
|
||
<p class="sub">Origin-Server</p>
|
||
<p class="state err">Fehler</p>
|
||
</article>
|
||
</section>
|
||
|
||
<div class="actions">
|
||
<button class="btn primary" onclick="location.reload()">Erneut versuchen</button>
|
||
<button class="btn" onclick="document.getElementById('details').toggleAttribute('open')">Details anzeigen</button>
|
||
</div>
|
||
|
||
<details id="details" class="meta">
|
||
<summary><strong>Technische Details</strong></summary>
|
||
<ul>
|
||
<li>Fehler: <strong>521</strong> - Origin verweigert die Verbindung (z. B. Firewall, blockierter Port, kein Dienst am Ziel).</li>
|
||
<li>Zeit: <span id="now">-</span></li>
|
||
</ul>
|
||
<p>Tipps: Prüfe, ob dein Backend erreichbar ist (TCP/443 oder 80), ob der Dienst läuft und ob eine Firewall/Fail2ban/Rate-Limit die Proxy-IP blockiert.</p>
|
||
</details>
|
||
|
||
<footer>
|
||
<span>Wenn das Problem fortbesteht, kontaktiere den Betreiber der Website.</span>
|
||
</footer>
|
||
</div>
|
||
|
||
<script>
|
||
// Kleine Komfortfunktionen für die Detailbox
|
||
(function(){
|
||
const now = new Date()
|
||
document.getElementById('now').textContent = now.toLocaleString()
|
||
// Client IP lässt sich hier ohne Backend nicht sauber ermitteln - Platzhalter
|
||
})()
|
||
</script>
|
||
</body>
|
||
</html>`
|
||
|
||
w.Header().Set("Content-Type", "text/html; charset=utf-8")
|
||
_, _ = w.Write([]byte(html))
|
||
}
|