first commit

backend/app/services/router_service.py

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+from datetime import datetime
+import io
+from pathlib import Path
+
+import paramiko
+from sqlalchemy.orm import Session
+
+from app.models.router import Router
+
+
+class RouterService:
+    def _load_pkey(self, ssh_key_str: str):
+        key_str = (ssh_key_str or "").strip()
+        key_buffer = io.StringIO(key_str)
+        loaders = [
+            paramiko.RSAKey.from_private_key,
+            paramiko.Ed25519Key.from_private_key,
+            paramiko.ECDSAKey.from_private_key,
+        ]
+        last_error = None
+        for loader in loaders:
+            key_buffer.seek(0)
+            try:
+                return loader(key_buffer)
+            except Exception as exc:
+                last_error = exc
+        raise ValueError("Failed to load SSH private key") from last_error
+
+    def _connect(self, router: Router, global_ssh_key: str | None = None):
+        client = paramiko.SSHClient()
+        client.set_missing_host_key_policy(paramiko.AutoAddPolicy())
+        key_source = router.ssh_key.strip() if router.ssh_key and router.ssh_key.strip() else (global_ssh_key or "")
+        if key_source:
+            pkey = self._load_pkey(key_source)
+            client.connect(router.host, port=router.port, username=router.ssh_user, pkey=pkey, timeout=10)
+        else:
+            client.connect(
+                router.host,
+                port=router.port,
+                username=router.ssh_user,
+                password=router.ssh_password,
+                timeout=10,
+                allow_agent=False,
+                look_for_keys=False,
+                banner_timeout=10,
+            )
+        return client
+
+    def export(self, router: Router, global_ssh_key: str | None = None) -> str:
+        client = self._connect(router, global_ssh_key)
+        _, stdout, _ = client.exec_command("/export")
+        output = stdout.read().decode("utf-8", errors="ignore")
+        client.close()
+        return output
+
+    def binary_backup(self, router: Router, backup_name: str, local_path: str, global_ssh_key: str | None = None) -> str:
+        client = self._connect(router, global_ssh_key)
+        _, stdout, _ = client.exec_command(f"/system backup save name={backup_name}")
+        stdout.channel.recv_exit_status()
+        sftp = client.open_sftp()
+        remote_file = f"{backup_name}.backup"
+        sftp.get(remote_file, local_path)
+        try:
+            sftp.remove(remote_file)
+        except Exception:
+            pass
+        sftp.close()
+        client.close()
+        return local_path
+
+    def upload_backup(self, router: Router, local_backup_path: str, global_ssh_key: str | None = None):
+        client = self._connect(router, global_ssh_key)
+        sftp = client.open_sftp()
+        target_name = Path(local_backup_path).name
+        sftp.put(local_backup_path, target_name)
+        sftp.close()
+        client.close()
+
+    def probe_connection(self, router: Router, global_ssh_key: str | None = None):
+        tested_at = datetime.utcnow()
+        try:
+            client = self._connect(router, global_ssh_key)
+            _, stdout, _ = client.exec_command("/system resource print without-paging")
+            resource_output = stdout.read().decode("utf-8", errors="ignore")
+            _, stdout, _ = client.exec_command("/system identity print")
+            identity_output = stdout.read().decode("utf-8", errors="ignore")
+            client.close()
+            model = "Unknown"
+            uptime = "Unknown"
+            hostname = "Unknown"
+            version = "Unknown"
+            for line in resource_output.splitlines():
+                if "board-name" in line:
+                    model = line.split(":", 1)[1].strip()
+                if "uptime" in line:
+                    uptime = line.split(":", 1)[1].strip()
+                if "version" in line:
+                    version = line.split(":", 1)[1].strip()
+            for line in identity_output.splitlines():
+                if "name" in line:
+                    hostname = line.split(":", 1)[1].strip()
+            return {
+                "success": True,
+                "tested_at": tested_at,
+                "model": model,
+                "uptime": uptime,
+                "hostname": hostname,
+                "version": version,
+                "error": None,
+            }
+        except Exception as exc:
+            return {
+                "success": False,
+                "tested_at": tested_at,
+                "model": "Unknown",
+                "uptime": "Unknown",
+                "hostname": router.name,
+                "version": None,
+                "error": str(exc),
+            }
+
+    def _store_connection_result(self, db: Session, router: Router, result: dict):
+        router.last_connection_status = result["success"]
+        router.last_connection_tested_at = result["tested_at"]
+        router.last_connection_error = result.get("error")
+        router.last_connection_hostname = result.get("hostname")
+        router.last_connection_model = result.get("model")
+        router.last_connection_version = result.get("version")
+        router.last_connection_uptime = result.get("uptime")
+        db.add(router)
+        db.commit()
+        db.refresh(router)
+        return result
+
+    def test_connection(self, db: Session, router: Router, global_ssh_key: str | None = None):
+        result = self.probe_connection(router, global_ssh_key)
+        return self._store_connection_result(db, router, result)
+
+
+router_service = RouterService()