Handle submit API response safely and avoid 500 crash

Add security hardening and XSS protection

.env.example

@@ -53,3 +53,9 @@ BASIC_AUTH_PASS=CHANGE_ME
 
 # ===== Polling =====
 POLL_SECONDS=5
+
+# ===== SSH host key verification (optional) =====
+# Path to known_hosts file inside container. If present, strict host key
+# checking is used. If absent, all host keys are accepted (less secure).
+# Generate with: ssh-keyscan -p 22 192.168.1.1 > known_hosts
+# SSH_KNOWN_HOSTS=/ssh/known_hosts

README.md

@@ -11,7 +11,7 @@ Web GUI to:
 
 ## Files
 - `docker-compose.yml` – stack
-- `.env.example` – copy to `.env` and fill values
+- `.env.example` – copy to `.env` and fill in your values (**never commit `.env`!**)
 - `jd-webgui/app.py` – FastAPI web app
 - `jd-webgui/Dockerfile` – includes ffprobe
 
@@ -40,6 +40,16 @@ docker compose up -d --build
 - If `MYJD_DEVICE` is empty, the WebGUI will automatically pick the first available device.
 - Ensure the SSH user can write to `/jellyfin/Filme` (and series dir if used).
 
+## Security
+- **Never commit `.env`** – it contains passwords and API keys. Only `.env.example` is tracked.
+- **SSH host key verification**: For secure SFTP transfers, provide a `known_hosts` file:
+  ```bash
+  ssh-keyscan -p 22 192.168.1.1 > known_hosts
+  ```
+  Mount it in `docker-compose.yml` and set `SSH_KNOWN_HOSTS=/ssh/known_hosts`.
+  Without it, any host key is accepted (MITM risk on untrusted networks).
+- **Basic Auth** protects the WebGUI but transmits credentials in cleartext over HTTP. Use a reverse proxy with HTTPS (e.g. Traefik, Caddy) in production.
+
 ## Troubleshooting
 - Device not found: list devices
 ```bash

docker-compose.yml

@@ -21,11 +21,9 @@ services:
       - jdownloader
     ports:
       - "8080:8080"
-    env_file:
-      - .env
     environment:
       TZ: Europe/Berlin
     volumes:
-      - ./data/jd-output:/output:ro
+      - ./data/jd-output:/output:rw
       - ./data/md5:/md5:rw
       - /root/.ssh/id_ed25519:/ssh/id_ed25519:ro

jd-webgui/app.py

@@ -3,6 +3,7 @@ from __future__ import annotations
 
 import base64
 import hashlib
+import html as html_mod
 import json
 import os
 import re
@@ -18,7 +19,7 @@ from typing import Any, Dict, List, Optional, Tuple
 from myjdapi import Myjdapi
 import paramiko
 from fastapi import FastAPI, Form, Request
-from fastapi.responses import HTMLResponse, RedirectResponse
+from fastapi.responses import HTMLResponse, PlainTextResponse, RedirectResponse
 from fastapi.staticfiles import StaticFiles
 
 # ============================================================
@@ -56,9 +57,23 @@ POLL_SECONDS = float(os.environ.get("POLL_SECONDS", "5"))
 
 # JDownloader writes here inside container
 JD_OUTPUT_PATH = "/output"
+PROXY_EXPORT_PATH = os.environ.get("PROXY_EXPORT_PATH", "/output/jd-proxies.jdproxies")
+LOG_BUFFER_LIMIT = int(os.environ.get("LOG_BUFFER_LIMIT", "500"))
 
 URL_RE = re.compile(r"^https?://", re.I)
 
+NO_PROXY_OPENER = urllib.request.build_opener(urllib.request.ProxyHandler({}))
+
+def esc(s: str) -> str:
+    """HTML-escape a string to prevent XSS."""
+    return html_mod.escape(str(s), quote=True)
+
+def mask_secret(value: str, visible: int = 4) -> str:
+    """Mask a secret string, showing only the last `visible` characters."""
+    if len(value) <= visible:
+        return "***"
+    return "***" + value[-visible:]
+
 VIDEO_EXTS = {
     ".mkv", ".mp4", ".m4v", ".avi", ".mov", ".wmv", ".flv", ".webm",
     ".ts", ".m2ts", ".mts", ".mpg", ".mpeg", ".vob", ".ogv",
@@ -117,9 +132,26 @@ class Job:
     library: str  # movies|series|auto
     status: str   # queued|collecting|downloading|upload|finished|failed
     message: str
+    progress: float = 0.0
+    cancel_requested: bool = False
 
 jobs: Dict[str, Job] = {}
 lock = threading.Lock()
+log_lock = threading.Lock()
+connection_logs: List[str] = []
+
+def log_connection(message: str) -> None:
+    timestamp = time.strftime("%Y-%m-%d %H:%M:%S")
+    line = f"[{timestamp}] {message}"
+    with log_lock:
+        connection_logs.append(line)
+        if len(connection_logs) > LOG_BUFFER_LIMIT:
+            excess = len(connection_logs) - LOG_BUFFER_LIMIT
+            del connection_logs[:excess]
+
+def get_connection_logs() -> str:
+    with log_lock:
+        return "\n".join(connection_logs)
 
 # ============================================================
 # Core helpers
@@ -146,6 +178,7 @@ def ensure_env():
 
 def get_device():
     jd = Myjdapi()
+    log_connection(f"MyJDownloader connect as {MYJD_EMAIL or 'unknown'}")
     jd.connect(MYJD_EMAIL, MYJD_PASSWORD)
 
     wanted = (MYJD_DEVICE or "").strip()
@@ -197,6 +230,29 @@ def is_video_file(path: str) -> bool:
         return False
     return ext in VIDEO_EXTS
 
+DEMO_PATTERNS = {"big_buck_bunny", "bigbuckbunny", "big buck bunny", "bbb_sunflower"}
+
+def is_demo_link(name: str) -> bool:
+    """Detect JDownloader demo/fallback videos (e.g. Big Buck Bunny)."""
+    lower = name.lower().replace("-", "_").replace(".", " ")
+    return any(pat in lower for pat in DEMO_PATTERNS)
+
+def check_url_reachable(url: str) -> Optional[str]:
+    """Try a HEAD request to verify the URL is reachable. Returns error string or None."""
+    try:
+        req = urllib.request.Request(url, method="HEAD")
+        req.add_header("User-Agent", "Mozilla/5.0")
+        with urllib.request.urlopen(req, timeout=10) as resp:
+            if resp.status >= 400:
+                return f"URL antwortet mit HTTP {resp.status}"
+    except urllib.error.HTTPError as e:
+        return f"URL nicht erreichbar: HTTP {e.code}"
+    except urllib.error.URLError as e:
+        return f"URL nicht erreichbar: {e.reason}"
+    except Exception as e:
+        return f"URL-Check fehlgeschlagen: {e}"
+    return None
+
 def md5_file(path: str) -> str:
     h = hashlib.md5()
     with open(path, "rb") as f:
@@ -205,12 +261,24 @@ def md5_file(path: str) -> str:
     return h.hexdigest()
 
 def write_md5_sidecar(file_path: str, md5_hex: str) -> str:
-    os.makedirs(MD5_DIR, exist_ok=True)
     base = os.path.basename(file_path)
-    md5_path = os.path.join(MD5_DIR, base + ".md5")
+    candidates = [MD5_DIR, "/tmp/md5"]
+    last_err: Optional[Exception] = None
+
+    for target in candidates:
+        try:
+            os.makedirs(target, exist_ok=True)
+            md5_path = os.path.join(target, base + ".md5")
             with open(md5_path, "w", encoding="utf-8") as f:
                 f.write(f"{md5_hex}  {base}\n")
             return md5_path
+        except PermissionError as exc:
+            last_err = exc
+            continue
+
+    if last_err:
+        raise last_err
+    raise RuntimeError("Failed to write MD5 sidecar file.")
 
 def ffprobe_ok(path: str) -> bool:
     try:
@@ -228,9 +296,17 @@ def ffprobe_ok(path: str) -> bool:
 # ============================================================
 # SSH/SFTP
 # ============================================================
+SSH_KNOWN_HOSTS = os.environ.get("SSH_KNOWN_HOSTS", "/ssh/known_hosts")
+
 def ssh_connect() -> paramiko.SSHClient:
     ssh = paramiko.SSHClient()
+    if os.path.isfile(SSH_KNOWN_HOSTS):
+        ssh.load_host_keys(SSH_KNOWN_HOSTS)
+        ssh.set_missing_host_key_policy(paramiko.RejectPolicy())
+        log_connection(f"SSH connect {JELLYFIN_USER}@{JELLYFIN_HOST}:{JELLYFIN_PORT} (known_hosts verified)")
+    else:
         ssh.set_missing_host_key_policy(paramiko.AutoAddPolicy())
+        log_connection(f"SSH connect {JELLYFIN_USER}@{JELLYFIN_HOST}:{JELLYFIN_PORT} (WARNING: no known_hosts, accepting any host key)")
     ssh.connect(
         hostname=JELLYFIN_HOST,
         port=JELLYFIN_PORT,
@@ -253,6 +329,7 @@ def sftp_mkdirs(sftp: paramiko.SFTPClient, remote_dir: str):
 def sftp_upload(ssh: paramiko.SSHClient, local_path: str, remote_path: str):
     sftp = ssh.open_sftp()
     try:
+        log_connection(f"SFTP upload {local_path} -> {remote_path}")
         sftp_mkdirs(sftp, os.path.dirname(remote_path))
         sftp.put(local_path, remote_path)
     finally:
@@ -261,6 +338,7 @@ def sftp_upload(ssh: paramiko.SSHClient, local_path: str, remote_path: str):
 def remote_md5sum(ssh: paramiko.SSHClient, remote_path: str) -> str:
     quoted = shlex.quote(remote_path)
     cmd = f"md5sum {quoted}"
+    log_connection(f"SSH exec {cmd}")
     stdin, stdout, stderr = ssh.exec_command(cmd, timeout=120)
     out = stdout.read().decode("utf-8", "replace").strip()
     err = stderr.read().decode("utf-8", "replace").strip()
@@ -273,9 +351,20 @@ def remote_md5sum(ssh: paramiko.SSHClient, remote_path: str) -> str:
 # ============================================================
 # TMDB & naming
 # ============================================================
+def _sanitize_url_for_log(url: str) -> str:
+    """Remove sensitive query params (api_key) from URLs before logging."""
+    parsed = urllib.parse.urlparse(url)
+    params = urllib.parse.parse_qs(parsed.query, keep_blank_values=True)
+    for key in ("api_key", "apikey", "token"):
+        if key in params:
+            params[key] = ["***"]
+    safe_query = urllib.parse.urlencode(params, doseq=True)
+    return urllib.parse.urlunparse(parsed._replace(query=safe_query))
+
 def _http_get_json(url: str, headers: Optional[Dict[str, str]] = None) -> Any:
     req = urllib.request.Request(url, headers=headers or {})
-    with urllib.request.urlopen(req, timeout=20) as r:
+    log_connection(f"HTTP GET {_sanitize_url_for_log(url)} (no-proxy)")
+    with NO_PROXY_OPENER.open(req, timeout=20) as r:
         return json.loads(r.read().decode("utf-8", "replace"))
 
 def tmdb_search_movie(query: str) -> Optional[Dict[str, Any]]:
@@ -307,6 +396,124 @@ def sanitize_name(name: str) -> str:
     out = "".join("_" if c in bad else c for c in name).strip()
     return re.sub(r"\s+", " ", out)
 
+def format_proxy_lines(raw: str, scheme: str) -> str:
+    """
+    Takes raw lines (ip:port or scheme://ip:port) and outputs normalized lines:
+    scheme://ip:port (one per line). Ignores empty lines and comments.
+    """
+    scheme = scheme.strip().lower()
+    if scheme not in {"socks5", "socks4", "http"}:
+        raise ValueError("Unsupported proxy scheme")
+
+    out = []
+    for line in (raw or "").splitlines():
+        s = line.strip()
+        if not s or s.startswith("#"):
+            continue
+
+        if "://" in s:
+            s = s.split("://", 1)[1].strip()
+
+        if ":" not in s:
+            continue
+
+        host, port = s.rsplit(":", 1)
+        host = host.strip()
+        port = port.strip()
+
+        if not host or not port.isdigit():
+            continue
+
+        out.append(f"{scheme}://{host}:{port}")
+
+    seen = set()
+    dedup = []
+    for x in out:
+        if x not in seen:
+            seen.add(x)
+            dedup.append(x)
+
+    return "\n".join(dedup)
+
+def fetch_proxy_list(url: str) -> str:
+    req = urllib.request.Request(url)
+    log_connection(f"HTTP GET {url} (no-proxy)")
+    with NO_PROXY_OPENER.open(req, timeout=20) as resp:
+        text = resp.read().decode("utf-8", "replace")
+    if "\n" not in text and re.search(r"\s", text):
+        return re.sub(r"\s+", "\n", text.strip())
+    return text
+
+def build_jdproxies_payload(text: str) -> Dict[str, Any]:
+    if not text.strip():
+        raise ValueError("Keine Proxy-Einträge zum Speichern.")
+    entries: List[Dict[str, Any]] = []
+    type_map = {
+        "socks5": "SOCKS5",
+        "socks4": "SOCKS4",
+        "http": "HTTP",
+    }
+    entries.append({
+        "filter": None,
+        "proxy": {
+            "address": None,
+            "password": None,
+            "port": 80,
+            "type": "NONE",
+            "username": None,
+            "connectMethodPrefered": False,
+            "preferNativeImplementation": False,
+            "resolveHostName": False,
+        },
+        "enabled": True,
+        "pac": False,
+        "rangeRequestsSupported": True,
+        "reconnectSupported": True,
+    })
+    for line in text.splitlines():
+        s = line.strip()
+        if not s:
+            continue
+        parsed = urllib.parse.urlparse(s)
+        if not parsed.scheme or not parsed.hostname or parsed.port is None:
+            continue
+        proxy_type = type_map.get(parsed.scheme.lower())
+        if not proxy_type:
+            continue
+        entries.append({
+            "filter": None,
+            "proxy": {
+                "address": parsed.hostname,
+                "password": None,
+                "port": int(parsed.port),
+                "type": proxy_type,
+                "username": None,
+                "connectMethodPrefered": False,
+                "preferNativeImplementation": False,
+                "resolveHostName": False,
+            },
+            "enabled": True,
+            "pac": False,
+            "rangeRequestsSupported": True,
+            "reconnectSupported": False,
+        })
+    if not entries:
+        raise ValueError("Keine gültigen Proxy-Einträge gefunden.")
+    return {"customProxyList": entries}
+
+def save_proxy_export(text: str) -> str:
+    payload = build_jdproxies_payload(text)
+    export_path = PROXY_EXPORT_PATH
+    export_dir = os.path.dirname(export_path)
+    if export_dir:
+        os.makedirs(export_dir, exist_ok=True)
+    if os.path.exists(export_path):
+        os.remove(export_path)
+    with open(export_path, "w", encoding="utf-8") as handle:
+        handle.write(json.dumps(payload, indent=2))
+        handle.write("\n")
+    return export_path
+
 def pick_library_target(library_choice: str, filename: str, package_name: str) -> str:
     if library_choice not in {"movies", "series", "auto"}:
         library_choice = "auto"
@@ -378,7 +585,8 @@ def jellyfin_refresh_library():
         try:
             url = JELLYFIN_API_BASE + path
             req = urllib.request.Request(url, headers=headers, method="POST")
-            with urllib.request.urlopen(req, timeout=20) as r:
+            log_connection(f"HTTP POST {url} (no-proxy)")
+            with NO_PROXY_OPENER.open(req, timeout=20) as r:
                 _ = r.read()
             return
         except Exception:
@@ -395,6 +603,10 @@ def query_links_and_packages(dev, jobid: str) -> Tuple[List[Dict[str, Any]], Dic
         "name": True,
         "finished": True,
         "running": True,
+        "bytesLoaded": True,
+        "bytesTotal": True,
+        "bytes": True,
+        "totalBytes": True,
         "status": True,
         "packageUUID": True,
         "uuid": True,
@@ -431,6 +643,31 @@ def local_paths_from_links(links: List[Dict[str, Any]], pkg_map: Dict[Any, Dict[
             out.append(p)
     return out
 
+def call_raw_jd_api(dev, endpoints: List[str], payloads: List[Dict[str, Any]]) -> bool:
+    method_candidates = ["action", "call", "api", "request"]
+    for method_name in method_candidates:
+        method = getattr(dev, method_name, None)
+        if method is None:
+            continue
+        for endpoint in endpoints:
+            for payload in payloads:
+                try:
+                    method(endpoint, payload)
+                    return True
+                except TypeError:
+                    try:
+                        method(endpoint, params=payload)
+                        return True
+                    except TypeError:
+                        try:
+                            method(endpoint, data=payload)
+                            return True
+                        except Exception:
+                            continue
+                except Exception:
+                    continue
+    return False
+
 def try_remove_from_jd(dev, links: List[Dict[str, Any]], pkg_map: Dict[Any, Dict[str, Any]]) -> Optional[str]:
     link_ids = [l.get("uuid") for l in links if l.get("uuid") is not None]
     pkg_ids = list(pkg_map.keys())
@@ -465,8 +702,104 @@ def try_remove_from_jd(dev, links: List[Dict[str, Any]], pkg_map: Dict[Any, Dict
             except Exception:
                 continue
 
+    endpoint_candidates = [
+        "downloads/removeLinks",
+        "downloadsV2/removeLinks",
+        "downloadcontroller/removeLinks",
+    ]
+    if call_raw_jd_api(dev, endpoint_candidates, payloads):
+        return None
+
     return "JDownloader-API: Paket/Links konnten nicht entfernt werden (Wrapper-Methoden nicht vorhanden)."
 
+def try_cancel_from_jd(dev, links: List[Dict[str, Any]], pkg_map: Dict[Any, Dict[str, Any]]) -> Optional[str]:
+    link_ids = [l.get("uuid") for l in links if l.get("uuid") is not None]
+    pkg_ids = list(pkg_map.keys())
+
+    candidates = [
+        ("downloads", "removeLinks"),
+        ("downloads", "remove_links"),
+        ("downloads", "deleteLinks"),
+        ("downloads", "delete_links"),
+        ("downloadcontroller", "removeLinks"),
+        ("downloadcontroller", "remove_links"),
+    ]
+
+    payloads = [
+        {"linkUUIDs": link_ids, "packageUUIDs": pkg_ids, "deleteFiles": True},
+        {"linkIds": link_ids, "packageIds": pkg_ids, "deleteFiles": True},
+        {"linkUUIDs": link_ids, "deleteFiles": True},
+        {"packageUUIDs": pkg_ids, "deleteFiles": True},
+        {"linkUUIDs": link_ids, "packageUUIDs": pkg_ids, "removeFiles": True},
+        {"linkIds": link_ids, "packageIds": pkg_ids, "removeFiles": True},
+    ]
+
+    for ns, fn in candidates:
+        obj = getattr(dev, ns, None)
+        if obj is None:
+            continue
+        meth = getattr(obj, fn, None)
+        if meth is None:
+            continue
+        for payload in payloads:
+            try:
+                meth([payload])
+                return None
+            except Exception:
+                continue
+
+    endpoint_candidates = [
+        "downloads/removeLinks",
+        "downloadsV2/removeLinks",
+        "downloadcontroller/removeLinks",
+    ]
+    if call_raw_jd_api(dev, endpoint_candidates, payloads):
+        return None
+
+    return "JDownloader-API: Abbrechen fehlgeschlagen (Wrapper-Methoden nicht vorhanden)."
+
+def cancel_job(dev, jobid: str) -> Optional[str]:
+    links, pkg_map = query_links_and_packages(dev, jobid)
+    local_paths = local_paths_from_links(links, pkg_map)
+    for path in local_paths:
+        try:
+            if os.path.isfile(path):
+                os.remove(path)
+        except Exception:
+            pass
+        try:
+            sidecar = os.path.join(MD5_DIR, os.path.basename(path) + ".md5")
+            if os.path.isfile(sidecar):
+                os.remove(sidecar)
+        except Exception:
+            pass
+    return try_cancel_from_jd(dev, links, pkg_map)
+
+def calculate_progress(links: List[Dict[str, Any]]) -> float:
+    total = 0
+    loaded = 0
+    for link in links:
+        bytes_total = link.get("bytesTotal")
+        if bytes_total is None:
+            bytes_total = link.get("totalBytes")
+        if bytes_total is None:
+            bytes_total = link.get("bytes")
+        bytes_loaded = link.get("bytesLoaded")
+        if bytes_total is None or bytes_loaded is None:
+            continue
+        try:
+            bytes_total = int(bytes_total)
+            bytes_loaded = int(bytes_loaded)
+        except (TypeError, ValueError):
+            continue
+        if bytes_total <= 0:
+            continue
+        total += bytes_total
+        loaded += min(bytes_loaded, bytes_total)
+    if total <= 0:
+        return 0.0
+    return max(0.0, min(100.0, (loaded / total) * 100.0))
+
 # ============================================================
 # Worker
 # ============================================================
@@ -480,6 +813,13 @@ def worker(jobid: str):
                 job = jobs.get(jobid)
             if not job:
                 return
+            if job.cancel_requested:
+                cancel_msg = cancel_job(dev, jobid)
+                with lock:
+                    job.status = "canceled"
+                    job.message = cancel_msg or "Download abgebrochen und Dateien entfernt."
+                    job.progress = 0.0
+                return
 
             links, pkg_map = query_links_and_packages(dev, jobid)
 
@@ -487,15 +827,28 @@ def worker(jobid: str):
                 with lock:
                     job.status = "collecting"
                     job.message = "Warte auf Link-Crawler…"
+                    job.progress = 0.0
                 time.sleep(POLL_SECONDS)
                 continue
 
+            all_demo = all(is_demo_link(l.get("name", "")) for l in links)
+            if all_demo and not is_demo_link(job.url):
+                cancel_msg = cancel_job(dev, jobid)
+                with lock:
+                    job.status = "failed"
+                    base_msg = "JDownloader lieferte das Demo-Video Big Buck Bunny statt des gewünschten Links."
+                    job.message = f"{base_msg} {cancel_msg}" if cancel_msg else base_msg
+                    job.progress = 0.0
+                return
+
             all_finished = all(bool(l.get("finished")) for l in links)
             if not all_finished:
+                progress = calculate_progress(links)
                 with lock:
                     job.status = "downloading"
                     done = sum(1 for l in links if l.get("finished"))
                     job.message = f"Download läuft… ({done}/{len(links)} fertig)"
+                    job.progress = progress
                 time.sleep(POLL_SECONDS)
                 continue
 
@@ -506,6 +859,7 @@ def worker(jobid: str):
                 with lock:
                     job.status = "failed"
                     job.message = "Keine Video-Datei gefunden (Whitelist)."
+                    job.progress = 0.0
                 return
 
             valid_videos = [p for p in video_files if ffprobe_ok(p)]
@@ -513,11 +867,13 @@ def worker(jobid: str):
                 with lock:
                     job.status = "failed"
                     job.message = "ffprobe: keine gültige Video-Datei."
+                    job.progress = 0.0
                 return
 
             with lock:
                 job.status = "upload"
                 job.message = f"Download fertig. MD5/Upload/Verify für {len(valid_videos)} Datei(en)…"
+                job.progress = 100.0
 
             ssh = ssh_connect()
             try:
@@ -557,6 +913,7 @@ def worker(jobid: str):
             with lock:
                 job.status = "finished"
                 job.message = "Upload + MD5 OK. " + (jd_cleanup_msg or "JDownloader: Paket/Links entfernt.")
+                job.progress = 100.0
             return
 
     except Exception as e:
@@ -565,6 +922,7 @@ def worker(jobid: str):
             if job:
                 job.status = "failed"
                 job.message = str(e)
+                job.progress = 0.0
 
 # ============================================================
 # Web
@@ -573,23 +931,57 @@ def worker(jobid: str):
 def favicon():
     return HTMLResponse(status_code=204)
 
-def render_page(error: str = "") -> str:
+@app.get("/jobs", response_class=HTMLResponse)
+def jobs_get():
+    return HTMLResponse(render_job_rows())
+
+@app.get("/logs", response_class=HTMLResponse)
+def logs_get():
+    return HTMLResponse(render_logs_page())
+
+@app.get("/logs/data", response_class=PlainTextResponse)
+def logs_data():
+    return PlainTextResponse(get_connection_logs())
+
+def render_job_rows() -> str:
     rows = ""
     with lock:
         job_list = list(jobs.values())[::-1]
 
     for j in job_list:
+        progress_pct = f"{j.progress:.1f}%"
+        progress_html = (
+            f"<div class='progress-row'>"
+            f"<progress value='{j.progress:.1f}' max='100'></progress>"
+            f"<span class='progress-text'>{progress_pct}</span>"
+            f"</div>"
+        )
+        cancel_html = ""
+        if j.status not in {"finished", "failed", "canceled"}:
+            cancel_html = (
+                f"<form method='post' action='/cancel/{esc(j.id)}' class='inline-form'>"
+                f"<button type='submit' class='danger'>Abbrechen</button>"
+                f"</form>"
+            )
+        status_class = "error" if j.status == "failed" else ("success" if j.status == "finished" else "")
         rows += (
             f"<tr>"
-            f"<td><code>{j.id}</code></td>"
+            f"<td><code>{esc(j.id)}</code></td>"
-            f"<td style='max-width:560px; word-break:break-all;'>{j.url}</td>"
+            f"<td style='max-width:560px; word-break:break-all;'>{esc(j.url)}</td>"
-            f"<td>{j.package_name}</td>"
+            f"<td>{esc(j.package_name)}</td>"
-            f"<td>{j.library}</td>"
+            f"<td>{esc(j.library)}</td>"
-            f"<td><b>{j.status}</b><br/><small>{j.message}</small></td>"
+            f"<td><b class='{status_class}'>{esc(j.status)}</b><br/><small>{esc(j.message)}</small>{progress_html}{cancel_html}</td>"
             f"</tr>"
         )
 
-    err_html = f"<p class='error'>{error}</p>" if error else ""
+    if not rows:
+        rows = "<tr><td colspan='5'><em>No jobs yet.</em></td></tr>"
+    return rows
+
+def render_page(error: str = "") -> str:
+    rows = render_job_rows()
+
+    err_html = f"<p class='error'>{esc(error)}</p>" if error else ""
     auth_note = "aktiv" if _auth_enabled() else "aus"
     return f"""
     <html>
@@ -597,9 +989,24 @@ def render_page(error: str = "") -> str:
       <link rel="stylesheet" href="/static/style.css">
       <meta charset="utf-8">
       <title>JD → Jellyfin</title>
+      <script>
+        async function refreshJobs() {{
+          if (document.hidden) return;
+          try {{
+            const resp = await fetch('/jobs');
+            if (!resp.ok) return;
+            const html = await resp.text();
+            const tbody = document.getElementById('jobs-body');
+            if (tbody) tbody.innerHTML = html;
+          }} catch (e) {{
+          }}
+        }}
+        setInterval(refreshJobs, 5000);
+      </script>
     </head>
     <body>
       <h1>JD → Jellyfin</h1>
+      {render_nav("downloads")}
       {err_html}
 
       <form method="post" action="/submit">
@@ -632,10 +1039,121 @@ def render_page(error: str = "") -> str:
         <thead>
           <tr><th>JobID</th><th>URL</th><th>Paket</th><th>Ziel</th><th>Status</th></tr>
         </thead>
-        <tbody>
+        <tbody id="jobs-body">
-          {rows if rows else "<tr><td colspan='5'><em>No jobs yet.</em></td></tr>"}
+          {rows}
         </tbody>
       </table>
+
+      <form method="post" action="/clear-finished" style="margin-top:10px;">
+        <button type="submit" style="background:#666; color:#fff;">Erledigte Jobs entfernen</button>
+      </form>
+    </body>
+    </html>
+    """
+
+def render_nav(active: str) -> str:
+    def link(label: str, href: str, key: str) -> str:
+        style = "font-weight:700;" if active == key else ""
+        return f"<a href='{href}' style='margin-right:14px; {style}'>{label}</a>"
+    return (
+        "<div style='margin: 8px 0 14px 0;'>"
+        + link("Downloads", "/", "downloads")
+        + link("Proxies", "/proxies", "proxies")
+        + link("Logs", "/logs", "logs")
+        + "</div>"
+    )
+
+def render_logs_page() -> str:
+    return f"""
+    <html>
+    <head>
+      <link rel="stylesheet" href="/static/style.css">
+      <meta charset="utf-8">
+      <title>JD → Jellyfin (Logs)</title>
+      <script>
+        async function refreshLogs() {{
+          if (document.hidden) return;
+          try {{
+            const resp = await fetch('/logs/data');
+            if (!resp.ok) return;
+            const text = await resp.text();
+            const area = document.getElementById('log-body');
+            if (area) {{
+              area.value = text;
+              area.scrollTop = area.scrollHeight;
+            }}
+          }} catch (e) {{
+          }}
+        }}
+        setInterval(refreshLogs, 2000);
+        window.addEventListener('load', refreshLogs);
+      </script>
+    </head>
+    <body>
+      <h1>JD → Jellyfin</h1>
+      {render_nav("logs")}
+      <p class="hint">Verbindungs-Debugger (Echtzeit). Letzte {LOG_BUFFER_LIMIT} Einträge.</p>
+      <textarea id="log-body" class="log-area" rows="20" readonly></textarea>
+    </body>
+    </html>
+    """
+
+def render_proxies_page(
+    error: str = "",
+    message: str = "",
+    socks5_in: str = "",
+    socks4_in: str = "",
+    out_text: str = "",
+    export_path: str = "",
+) -> str:
+    err_html = f"<p class='error'>{esc(error)}</p>" if error else ""
+    msg_html = f"<p class='success'>{esc(message)}</p>" if message else ""
+    return f"""
+    <html>
+    <head>
+      <link rel="stylesheet" href="/static/style.css">
+      <meta charset="utf-8">
+      <title>JD → Jellyfin (Proxies)</title>
+    </head>
+    <body>
+      <h1>JD → Jellyfin</h1>
+      {render_nav("proxies")}
+      {err_html}
+      {msg_html}
+
+      <form method="post" action="/proxies">
+        <div class="row">
+          <label>SOCKS5 (ein Proxy pro Zeile, z. B. IP:PORT)</label><br/>
+          <textarea name="socks5_in" rows="6" style="width:100%; max-width:860px; padding:10px; border:1px solid #ccc; border-radius:8px;">{esc(socks5_in)}</textarea>
+        </div>
+
+        <div class="row">
+          <label>SOCKS4 (ein Proxy pro Zeile, z. B. IP:PORT)</label><br/>
+          <textarea name="socks4_in" rows="6" style="width:100%; max-width:860px; padding:10px; border:1px solid #ccc; border-radius:8px;">{esc(socks4_in)}</textarea>
+        </div>
+
+        <button type="submit">In JDownloader-Format umwandeln</button>
+      </form>
+
+      <h2 style="margin-top:18px;">JDownloader Import-Liste</h2>
+      <p class="hint">Format: <code>socks5://IP:PORT</code>, <code>socks4://IP:PORT</code>. Keine Prüfung/Validierung.</p>
+
+      <div class="row">
+        <textarea id="out" rows="12" readonly style="width:100%; max-width:860px; padding:10px; border:1px solid #ccc; border-radius:8px;">{esc(out_text)}</textarea>
+      </div>
+
+      <button type="button" onclick="navigator.clipboard.writeText(document.getElementById('out').value)">Kopieren</button>
+
+      <h2 style="margin-top:18px;">Datei für Connection Manager</h2>
+      <p class="hint">Speichert die Liste als <code>.jdproxies</code> im Container, z. B. zum Import in JDownloader → Verbindungsmanager → Importieren.</p>
+
+      <form method="post" action="/proxies/save">
+        <textarea name="socks5_in" style="display:none;">{esc(socks5_in)}</textarea>
+        <textarea name="socks4_in" style="display:none;">{esc(socks4_in)}</textarea>
+        <button type="submit">Liste als JDProxies speichern</button>
+      </form>
+
+      <p class="hint">Aktueller Pfad: <code>{esc(export_path or PROXY_EXPORT_PATH)}</code></p>
     </body>
     </html>
     """
@@ -650,6 +1168,7 @@ def index():
 
 @app.post("/submit")
 def submit(url: str = Form(...), package_name: str = Form(""), library: str = Form("auto")):
+    try:
         ensure_env()
         url = url.strip()
         package_name = (package_name or "").strip() or "WebGUI"
@@ -658,6 +1177,11 @@ def submit(url: str = Form(...), package_name: str = Form(""), library: str = Fo
         if not URL_RE.match(url):
             return HTMLResponse(render_page("Nur http(s) URLs erlaubt."), status_code=400)
 
+        url_err = check_url_reachable(url)
+        if url_err:
+            log_connection(f"URL-Check fehlgeschlagen: {url} -> {url_err}")
+            return HTMLResponse(render_page(f"Link nicht erreichbar: {url_err}"), status_code=400)
+
         dev = get_device()
         resp = dev.linkgrabber.add_links([{
             "links": url,
@@ -666,9 +1190,18 @@ def submit(url: str = Form(...), package_name: str = Form(""), library: str = Fo
             "packageName": package_name,
         }])
 
-    jobid = str(resp.get("id", ""))
+        jobid = ""
+        if isinstance(resp, dict):
+            jobid = str(resp.get("id", "")).strip()
+        elif isinstance(resp, (str, int)):
+            jobid = str(resp).strip()
+        elif isinstance(resp, list) and resp and isinstance(resp[0], dict):
+            jobid = str(resp[0].get("id", "")).strip()
+
         if not jobid:
-        return HTMLResponse(render_page(f"Unerwartete Antwort von add_links: {resp}"), status_code=500)
+            msg = f"Unerwartete Antwort von add_links (kein Job-ID): {resp!r}"
+            log_connection(msg)
+            return HTMLResponse(render_page(msg), status_code=502)
 
         with lock:
             jobs[jobid] = Job(
@@ -678,9 +1211,106 @@ def submit(url: str = Form(...), package_name: str = Form(""), library: str = Fo
                 library=library,
                 status="queued",
                 message="Download gestartet",
+                progress=0.0,
             )
 
         t = threading.Thread(target=worker, args=(jobid,), daemon=True)
         t.start()
 
         return RedirectResponse(url="/", status_code=303)
+    except Exception as e:
+        log_connection(f"Submit-Fehler: {e}")
+        return HTMLResponse(render_page(f"Interner Fehler beim Absenden: {e}"), status_code=500)
+
+@app.post("/cancel/{jobid}")
+def cancel(jobid: str):
+    with lock:
+        job = jobs.get(jobid)
+        if not job:
+            return RedirectResponse(url="/", status_code=303)
+        if job.status in {"finished", "failed", "canceled"}:
+            return RedirectResponse(url="/", status_code=303)
+        job.cancel_requested = True
+        job.message = "Abbruch angefordert…"
+    return RedirectResponse(url="/", status_code=303)
+
+@app.post("/clear-finished")
+def clear_finished():
+    with lock:
+        to_remove = [jid for jid, j in jobs.items() if j.status in {"finished", "failed", "canceled"}]
+        for jid in to_remove:
+            del jobs[jid]
+    return RedirectResponse(url="/", status_code=303)
+
+@app.get("/proxies", response_class=HTMLResponse)
+def proxies_get():
+    try:
+        socks5_in = fetch_proxy_list(
+            "https://api.proxyscrape.com/v4/free-proxy-list/get?request=displayproxies&protocol=socks5&timeout=10000&country=all&ssl=yes&anonymity=elite&skip=0&limit=2000"
+        )
+        socks4_in = fetch_proxy_list(
+            "https://api.proxyscrape.com/v4/free-proxy-list/get?request=displayproxies&protocol=socks4&timeout=10000&country=all&ssl=yes&anonymity=elite&skip=0&limit=2000"
+        )
+
+        s5 = format_proxy_lines(socks5_in, "socks5")
+        s4 = format_proxy_lines(socks4_in, "socks4")
+        combined = "\n".join([x for x in [s5, s4] if x.strip()])
+        return HTMLResponse(render_proxies_page(
+            socks5_in=socks5_in,
+            socks4_in=socks4_in,
+            out_text=combined,
+            export_path=PROXY_EXPORT_PATH,
+        ))
+    except Exception as e:
+        return HTMLResponse(render_proxies_page(error=str(e)), status_code=502)
+
+@app.post("/proxies", response_class=HTMLResponse)
+def proxies_post(
+    socks5_in: str = Form(""),
+    socks4_in: str = Form(""),
+):
+    try:
+        s5 = format_proxy_lines(socks5_in, "socks5")
+        s4 = format_proxy_lines(socks4_in, "socks4")
+
+        combined = "\n".join([x for x in [s5, s4] if x.strip()])
+        return HTMLResponse(render_proxies_page(
+            socks5_in=socks5_in,
+            socks4_in=socks4_in,
+            out_text=combined,
+            export_path=PROXY_EXPORT_PATH,
+        ))
+    except Exception as e:
+        return HTMLResponse(render_proxies_page(
+            error=str(e),
+            socks5_in=socks5_in,
+            socks4_in=socks4_in,
+            out_text="",
+            export_path=PROXY_EXPORT_PATH,
+        ), status_code=400)
+
+@app.post("/proxies/save", response_class=HTMLResponse)
+def proxies_save(
+    socks5_in: str = Form(""),
+    socks4_in: str = Form(""),
+):
+    try:
+        s5 = format_proxy_lines(socks5_in, "socks5")
+        s4 = format_proxy_lines(socks4_in, "socks4")
+        combined = "\n".join([x for x in [s5, s4] if x.strip()])
+        export_path = save_proxy_export(combined)
+        return HTMLResponse(render_proxies_page(
+            message=f"Proxy-Liste gespeichert: {export_path}",
+            socks5_in=socks5_in,
+            socks4_in=socks4_in,
+            out_text=combined,
+            export_path=export_path,
+        ))
+    except Exception as e:
+        return HTMLResponse(render_proxies_page(
+            error=str(e),
+            socks5_in=socks5_in,
+            socks4_in=socks4_in,
+            out_text="",
+            export_path=PROXY_EXPORT_PATH,
+        ), status_code=400)

jd-webgui/static/style.css

@@ -4,9 +4,19 @@ form { background:#fff; border:1px solid #e5e5e5; border-radius:10px; padding:14
 .row { margin-bottom: 10px; }
 input, select { padding:10px; border:1px solid #ccc; border-radius:8px; font-size:14px; width: 100%; max-width: 860px; }
 button { padding:10px 14px; border:0; border-radius:8px; font-weight:600; cursor:pointer; }
+button.danger { background:#b00020; color:#fff; }
+progress { width: 100%; height: 12px; }
+progress::-webkit-progress-bar { background:#f0f0f0; border-radius:8px; }
+progress::-webkit-progress-value { background:#1b7f3a; border-radius:8px; }
+progress::-moz-progress-bar { background:#1b7f3a; border-radius:8px; }
 table { margin-top:16px; width:100%; border-collapse: collapse; background:#fff; border:1px solid #e5e5e5; border-radius:10px; overflow:hidden; }
 th, td { border-top:1px solid #eee; padding:10px; vertical-align: top; font-size:14px; }
 th { background:#fbfbfb; text-align:left; }
 code { font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace; font-size: 12px; background:#f2f2f2; padding:2px 4px; border-radius:4px; }
 .hint { color:#555; font-size: 12px; margin-top: 10px; }
 .error { color:#b00020; font-weight: 700; }
+.success { color:#1b7f3a; font-weight: 700; }
+.progress-row { display:flex; align-items:center; gap:8px; margin-top:6px; }
+.progress-text { font-size:12px; color:#333; min-width:48px; }
+.inline-form { margin-top:6px; }
+.log-area { width:100%; max-width: 920px; padding:10px; border:1px solid #ccc; border-radius:8px; background:#fff; }