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BanGUI/backend/app/routers/file_config.py
Lukas e15ad8fb62 Add filter write/create/delete and jail-filter assign endpoints (Task 2.2) 
- PUT /api/config/filters/{name}: updates failregex/ignoreregex/datepattern/
  journalmatch in filter.d/{name}.local; validates regex via re.compile();
  supports ?reload=true
- POST /api/config/filters: creates filter.d/{name}.local from FilterCreateRequest;
  returns 409 if file already exists
- DELETE /api/config/filters/{name}: deletes .local only; returns 409 for
  conf-only (readonly) filters
- POST /api/config/jails/{name}/filter: assigns filter to jail by writing
  'filter = {name}' to jail.d/{jail}.local; supports ?reload=true
- New models: FilterUpdateRequest, FilterCreateRequest, AssignFilterRequest
- New service helpers: _safe_filter_name, _validate_regex_patterns,
  _write_filter_local_sync, _set_jail_local_key_sync
- Fixed .local-only filter discovery in _parse_filters_sync (5-tuple return)
- Fixed get_filter extension stripping (.local is 6 chars not 5)
- Renamed file_config.py raw-write routes to /raw suffix
  (PUT /filters/{name}/raw, POST /filters/raw) to avoid routing conflicts
- Full service + router tests; all 930 tests pass
2026-03-13 18:13:03 +01:00

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"""File-based fail2ban configuration router.
Provides endpoints to list, view, edit, and create fail2ban configuration
files directly on the filesystem (``jail.d/``, ``filter.d/``, ``action.d/``).
Endpoints:
* ``GET /api/config/jail-files`` — list all jail config files
* ``GET /api/config/jail-files/{filename}`` — get one jail config file (with content)
* ``PUT /api/config/jail-files/{filename}`` — overwrite a jail config file
* ``PUT /api/config/jail-files/{filename}/enabled`` — enable/disable a jail config
* ``GET /api/config/filters/{name}/raw`` — get one filter file raw content
* ``PUT /api/config/filters/{name}/raw`` — update a filter file (raw content)
* ``POST /api/config/filters/raw`` — create a new filter file (raw content)
* ``GET /api/config/filters/{name}/parsed`` — parse a filter file into a structured model
* ``PUT /api/config/filters/{name}/parsed`` — update a filter file from a structured model
* ``GET /api/config/actions`` — list all action files
* ``GET /api/config/actions/{name}`` — get one action file (with content)
* ``PUT /api/config/actions/{name}`` — update an action file
* ``POST /api/config/actions`` — create a new action file
* ``GET /api/config/actions/{name}/parsed`` — parse an action file into a structured model
* ``PUT /api/config/actions/{name}/parsed`` — update an action file from a structured model
Note: ``GET /api/config/filters`` (enriched list) and
``GET /api/config/filters/{name}`` (full parsed detail) are handled by the
config router (``config.py``), which is registered first and therefore takes
precedence. Raw-content read/write variants are at ``/filters/{name}/raw``
and ``POST /filters/raw``.
"""
from __future__ import annotations
from typing import Annotated
from fastapi import APIRouter, HTTPException, Path, Request, status
from app.dependencies import AuthDep
from app.models.config import (
ActionConfig,
ActionConfigUpdate,
FilterConfig,
FilterConfigUpdate,
JailFileConfig,
JailFileConfigUpdate,
)
from app.models.file_config import (
ConfFileContent,
ConfFileCreateRequest,
ConfFilesResponse,
ConfFileUpdateRequest,
JailConfigFileContent,
JailConfigFileEnabledUpdate,
JailConfigFilesResponse,
)
from app.services import file_config_service
from app.services.file_config_service import (
ConfigDirError,
ConfigFileExistsError,
ConfigFileNameError,
ConfigFileNotFoundError,
ConfigFileWriteError,
)
router: APIRouter = APIRouter(prefix="/api/config", tags=["Config"])
# ---------------------------------------------------------------------------
# Path type aliases
# ---------------------------------------------------------------------------
_FilenamePath = Annotated[
str, Path(description="Config filename including extension (e.g. ``sshd.conf``).")
]
_NamePath = Annotated[
str, Path(description="Base name with or without extension (e.g. ``sshd`` or ``sshd.conf``).")
]
# ---------------------------------------------------------------------------
# Error helpers
# ---------------------------------------------------------------------------
def _not_found(filename: str) -> HTTPException:
return HTTPException(
status_code=status.HTTP_404_NOT_FOUND,
detail=f"Config file not found: {filename!r}",
)
def _bad_request(message: str) -> HTTPException:
return HTTPException(
status_code=status.HTTP_400_BAD_REQUEST,
detail=message,
)
def _conflict(filename: str) -> HTTPException:
return HTTPException(
status_code=status.HTTP_409_CONFLICT,
detail=f"Config file already exists: {filename!r}",
)
def _service_unavailable(message: str) -> HTTPException:
return HTTPException(
status_code=status.HTTP_503_SERVICE_UNAVAILABLE,
detail=message,
)
# ---------------------------------------------------------------------------
# Jail config file endpoints (Task 4a)
# ---------------------------------------------------------------------------
@router.get(
"/jail-files",
response_model=JailConfigFilesResponse,
summary="List all jail config files",
)
async def list_jail_config_files(
request: Request,
_auth: AuthDep,
) -> JailConfigFilesResponse:
"""Return metadata for every ``.conf`` and ``.local`` file in ``jail.d/``.
The ``enabled`` field reflects the value of the ``enabled`` key inside the
file (defaulting to ``true`` when the key is absent).
Args:
request: Incoming request (used for ``app.state.settings``).
_auth: Validated session — enforces authentication.
Returns:
:class:`~app.models.file_config.JailConfigFilesResponse`.
"""
config_dir: str = request.app.state.settings.fail2ban_config_dir
try:
return await file_config_service.list_jail_config_files(config_dir)
except ConfigDirError as exc:
raise _service_unavailable(str(exc)) from exc
@router.get(
"/jail-files/{filename}",
response_model=JailConfigFileContent,
summary="Return a single jail config file with its content",
)
async def get_jail_config_file(
request: Request,
_auth: AuthDep,
filename: _FilenamePath,
) -> JailConfigFileContent:
"""Return the metadata and raw content of one jail config file.
Args:
request: Incoming request.
_auth: Validated session.
filename: Filename including extension (e.g. ``sshd.conf``).
Returns:
:class:`~app.models.file_config.JailConfigFileContent`.
Raises:
HTTPException: 400 if *filename* is unsafe.
HTTPException: 404 if the file does not exist.
HTTPException: 503 if the config directory is unavailable.
"""
config_dir: str = request.app.state.settings.fail2ban_config_dir
try:
return await file_config_service.get_jail_config_file(config_dir, filename)
except ConfigFileNameError as exc:
raise _bad_request(str(exc)) from exc
except ConfigFileNotFoundError:
raise _not_found(filename) from None
except ConfigDirError as exc:
raise _service_unavailable(str(exc)) from exc
@router.put(
"/jail-files/{filename}",
status_code=status.HTTP_204_NO_CONTENT,
summary="Overwrite a jail.d config file with new raw content",
)
async def write_jail_config_file(
request: Request,
_auth: AuthDep,
filename: _FilenamePath,
body: ConfFileUpdateRequest,
) -> None:
"""Overwrite the raw content of an existing jail.d config file.
The change is written directly to disk. You must reload fail2ban
(``POST /api/config/reload``) separately for the change to take effect.
Args:
request: Incoming request.
_auth: Validated session.
filename: Filename of the jail config file (e.g. ``sshd.conf``).
body: New raw file content.
Raises:
HTTPException: 400 if *filename* is unsafe or content is invalid.
HTTPException: 404 if the file does not exist.
HTTPException: 503 if the config directory is unavailable.
"""
config_dir: str = request.app.state.settings.fail2ban_config_dir
try:
await file_config_service.write_jail_config_file(config_dir, filename, body)
except ConfigFileNameError as exc:
raise _bad_request(str(exc)) from exc
except ConfigFileNotFoundError:
raise _not_found(filename) from None
except ConfigFileWriteError as exc:
raise _bad_request(str(exc)) from exc
except ConfigDirError as exc:
raise _service_unavailable(str(exc)) from exc
@router.put(
"/jail-files/{filename}/enabled",
status_code=status.HTTP_204_NO_CONTENT,
summary="Enable or disable a jail configuration file",
)
async def set_jail_config_file_enabled(
request: Request,
_auth: AuthDep,
filename: _FilenamePath,
body: JailConfigFileEnabledUpdate,
) -> None:
"""Set the ``enabled = true/false`` key inside a jail config file.
The change modifies the file on disk. You must reload fail2ban
(``POST /api/config/reload``) separately for the change to take effect.
Args:
request: Incoming request.
_auth: Validated session.
filename: Filename of the jail config file (e.g. ``sshd.conf``).
body: New enabled state.
Raises:
HTTPException: 400 if *filename* is unsafe or the operation fails.
HTTPException: 404 if the file does not exist.
HTTPException: 503 if the config directory is unavailable.
"""
config_dir: str = request.app.state.settings.fail2ban_config_dir
try:
await file_config_service.set_jail_config_enabled(
config_dir, filename, body.enabled
)
except ConfigFileNameError as exc:
raise _bad_request(str(exc)) from exc
except ConfigFileNotFoundError:
raise _not_found(filename) from None
except ConfigFileWriteError as exc:
raise _bad_request(str(exc)) from exc
except ConfigDirError as exc:
raise _service_unavailable(str(exc)) from exc
@router.post(
"/jail-files",
response_model=ConfFileContent,
status_code=status.HTTP_201_CREATED,
summary="Create a new jail.d config file",
)
async def create_jail_config_file(
request: Request,
_auth: AuthDep,
body: ConfFileCreateRequest,
) -> ConfFileContent:
"""Create a new ``.conf`` file in ``jail.d/``.
Args:
request: Incoming request.
_auth: Validated session.
body: :class:`~app.models.file_config.ConfFileCreateRequest` with name and content.
Returns:
:class:`~app.models.file_config.ConfFileContent` with the created file metadata.
Raises:
HTTPException: 400 if the name is unsafe or the content exceeds the size limit.
HTTPException: 409 if a file with that name already exists.
HTTPException: 503 if the config directory is unavailable.
"""
config_dir: str = request.app.state.settings.fail2ban_config_dir
try:
filename = await file_config_service.create_jail_config_file(config_dir, body)
except ConfigFileNameError as exc:
raise _bad_request(str(exc)) from exc
except ConfigFileExistsError:
raise _conflict(body.name) from None
except ConfigFileWriteError as exc:
raise _bad_request(str(exc)) from exc
except ConfigDirError as exc:
raise _service_unavailable(str(exc)) from exc
return ConfFileContent(
name=body.name,
filename=filename,
content=body.content,
)
# ---------------------------------------------------------------------------
# Filter file endpoints (Task 4d)
# ---------------------------------------------------------------------------
@router.get(
"/filters/{name}/raw",
response_model=ConfFileContent,
summary="Return a filter definition file's raw content",
)
async def get_filter_file_raw(
request: Request,
_auth: AuthDep,
name: _NamePath,
) -> ConfFileContent:
"""Return the raw content of a filter definition file.
This endpoint provides direct access to the file bytes for the raw
config editor. For structured parsing with active/inactive status use
``GET /api/config/filters/{name}`` (served by the config router).
Args:
request: Incoming request.
_auth: Validated session.
name: Base name with or without extension (e.g. ``sshd`` or ``sshd.conf``).
Returns:
:class:`~app.models.file_config.ConfFileContent`.
Raises:
HTTPException: 400 if *name* is unsafe.
HTTPException: 404 if the file does not exist.
HTTPException: 503 if the config directory is unavailable.
"""
config_dir: str = request.app.state.settings.fail2ban_config_dir
try:
return await file_config_service.get_filter_file(config_dir, name)
except ConfigFileNameError as exc:
raise _bad_request(str(exc)) from exc
except ConfigFileNotFoundError:
raise _not_found(name) from None
except ConfigDirError as exc:
raise _service_unavailable(str(exc)) from exc
@router.put(
"/filters/{name}/raw",
status_code=status.HTTP_204_NO_CONTENT,
summary="Update a filter definition file (raw content)",
)
async def write_filter_file(
request: Request,
_auth: AuthDep,
name: _NamePath,
body: ConfFileUpdateRequest,
) -> None:
"""Overwrite the content of an existing filter definition file.
Args:
request: Incoming request.
_auth: Validated session.
name: Base name with or without extension.
body: New file content.
Raises:
HTTPException: 400 if *name* is unsafe or content exceeds the size limit.
HTTPException: 404 if the file does not exist.
HTTPException: 503 if the config directory is unavailable.
"""
config_dir: str = request.app.state.settings.fail2ban_config_dir
try:
await file_config_service.write_filter_file(config_dir, name, body)
except ConfigFileNameError as exc:
raise _bad_request(str(exc)) from exc
except ConfigFileNotFoundError:
raise _not_found(name) from None
except ConfigFileWriteError as exc:
raise _bad_request(str(exc)) from exc
except ConfigDirError as exc:
raise _service_unavailable(str(exc)) from exc
@router.post(
"/filters/raw",
status_code=status.HTTP_201_CREATED,
response_model=ConfFileContent,
summary="Create a new filter definition file (raw content)",
)
async def create_filter_file(
request: Request,
_auth: AuthDep,
body: ConfFileCreateRequest,
) -> ConfFileContent:
"""Create a new ``.conf`` file in ``filter.d/``.
Args:
request: Incoming request.
_auth: Validated session.
body: Name and initial content for the new file.
Returns:
The created :class:`~app.models.file_config.ConfFileContent`.
Raises:
HTTPException: 400 if *name* is invalid or content exceeds limit.
HTTPException: 409 if a file with that name already exists.
HTTPException: 503 if the config directory is unavailable.
"""
config_dir: str = request.app.state.settings.fail2ban_config_dir
try:
filename = await file_config_service.create_filter_file(config_dir, body)
except ConfigFileNameError as exc:
raise _bad_request(str(exc)) from exc
except ConfigFileExistsError:
raise _conflict(body.name) from None
except ConfigFileWriteError as exc:
raise _bad_request(str(exc)) from exc
except ConfigDirError as exc:
raise _service_unavailable(str(exc)) from exc
return ConfFileContent(
name=body.name,
filename=filename,
content=body.content,
)
# ---------------------------------------------------------------------------
# Action file endpoints (Task 4e)
# ---------------------------------------------------------------------------
@router.get(
"/actions",
response_model=ConfFilesResponse,
summary="List all action definition files",
)
async def list_action_files(
request: Request,
_auth: AuthDep,
) -> ConfFilesResponse:
"""Return a list of every ``.conf`` and ``.local`` file in ``action.d/``.
Args:
request: Incoming request.
_auth: Validated session.
Returns:
:class:`~app.models.file_config.ConfFilesResponse`.
"""
config_dir: str = request.app.state.settings.fail2ban_config_dir
try:
return await file_config_service.list_action_files(config_dir)
except ConfigDirError as exc:
raise _service_unavailable(str(exc)) from exc
@router.get(
"/actions/{name}",
response_model=ConfFileContent,
summary="Return an action definition file with its content",
)
async def get_action_file(
request: Request,
_auth: AuthDep,
name: _NamePath,
) -> ConfFileContent:
"""Return the content of an action definition file.
Args:
request: Incoming request.
_auth: Validated session.
name: Base name with or without extension.
Returns:
:class:`~app.models.file_config.ConfFileContent`.
Raises:
HTTPException: 400 if *name* is unsafe.
HTTPException: 404 if the file does not exist.
HTTPException: 503 if the config directory is unavailable.
"""
config_dir: str = request.app.state.settings.fail2ban_config_dir
try:
return await file_config_service.get_action_file(config_dir, name)
except ConfigFileNameError as exc:
raise _bad_request(str(exc)) from exc
except ConfigFileNotFoundError:
raise _not_found(name) from None
except ConfigDirError as exc:
raise _service_unavailable(str(exc)) from exc
@router.put(
"/actions/{name}",
status_code=status.HTTP_204_NO_CONTENT,
summary="Update an action definition file",
)
async def write_action_file(
request: Request,
_auth: AuthDep,
name: _NamePath,
body: ConfFileUpdateRequest,
) -> None:
"""Overwrite the content of an existing action definition file.
Args:
request: Incoming request.
_auth: Validated session.
name: Base name with or without extension.
body: New file content.
Raises:
HTTPException: 400 if *name* is unsafe or content exceeds the size limit.
HTTPException: 404 if the file does not exist.
HTTPException: 503 if the config directory is unavailable.
"""
config_dir: str = request.app.state.settings.fail2ban_config_dir
try:
await file_config_service.write_action_file(config_dir, name, body)
except ConfigFileNameError as exc:
raise _bad_request(str(exc)) from exc
except ConfigFileNotFoundError:
raise _not_found(name) from None
except ConfigFileWriteError as exc:
raise _bad_request(str(exc)) from exc
except ConfigDirError as exc:
raise _service_unavailable(str(exc)) from exc
@router.post(
"/actions",
status_code=status.HTTP_201_CREATED,
response_model=ConfFileContent,
summary="Create a new action definition file",
)
async def create_action_file(
request: Request,
_auth: AuthDep,
body: ConfFileCreateRequest,
) -> ConfFileContent:
"""Create a new ``.conf`` file in ``action.d/``.
Args:
request: Incoming request.
_auth: Validated session.
body: Name and initial content for the new file.
Returns:
The created :class:`~app.models.file_config.ConfFileContent`.
Raises:
HTTPException: 400 if *name* is invalid or content exceeds limit.
HTTPException: 409 if a file with that name already exists.
HTTPException: 503 if the config directory is unavailable.
"""
config_dir: str = request.app.state.settings.fail2ban_config_dir
try:
filename = await file_config_service.create_action_file(config_dir, body)
except ConfigFileNameError as exc:
raise _bad_request(str(exc)) from exc
except ConfigFileExistsError:
raise _conflict(body.name) from None
except ConfigFileWriteError as exc:
raise _bad_request(str(exc)) from exc
except ConfigDirError as exc:
raise _service_unavailable(str(exc)) from exc
return ConfFileContent(
name=body.name,
filename=filename,
content=body.content,
)
# ---------------------------------------------------------------------------
# Parsed filter endpoints (Task 2.1)
# ---------------------------------------------------------------------------
@router.get(
"/filters/{name}/parsed",
response_model=FilterConfig,
summary="Return a filter file parsed into a structured model",
)
async def get_parsed_filter(
request: Request,
_auth: AuthDep,
name: _NamePath,
) -> FilterConfig:
"""Parse a filter definition file and return its structured fields.
The file is read from ``filter.d/``, parsed as fail2ban INI format, and
returned as a :class:`~app.models.config.FilterConfig` JSON object. This
is the input model for the form-based filter editor (Task 2.3).
Args:
request: Incoming request.
_auth: Validated session.
name: Base name (e.g. ``sshd`` or ``sshd.conf``).
Returns:
:class:`~app.models.config.FilterConfig`.
Raises:
HTTPException: 400 if *name* is unsafe.
HTTPException: 404 if the file does not exist.
HTTPException: 503 if the config directory is unavailable.
"""
config_dir: str = request.app.state.settings.fail2ban_config_dir
try:
return await file_config_service.get_parsed_filter_file(config_dir, name)
except ConfigFileNameError as exc:
raise _bad_request(str(exc)) from exc
except ConfigFileNotFoundError:
raise _not_found(name) from None
except ConfigDirError as exc:
raise _service_unavailable(str(exc)) from exc
@router.put(
"/filters/{name}/parsed",
status_code=status.HTTP_204_NO_CONTENT,
summary="Update a filter file from a structured model",
)
async def update_parsed_filter(
request: Request,
_auth: AuthDep,
name: _NamePath,
body: FilterConfigUpdate,
) -> None:
"""Apply a partial structured update to a filter definition file.
Fields set to ``null`` in the request body are left unchanged. The file is
re-serialized to fail2ban INI format after merging.
Args:
request: Incoming request.
_auth: Validated session.
name: Base name of the filter to update.
body: Partial :class:`~app.models.config.FilterConfigUpdate`.
Raises:
HTTPException: 400 if *name* is unsafe or content exceeds the size limit.
HTTPException: 404 if the file does not exist.
HTTPException: 503 if the config directory is unavailable.
"""
config_dir: str = request.app.state.settings.fail2ban_config_dir
try:
await file_config_service.update_parsed_filter_file(config_dir, name, body)
except ConfigFileNameError as exc:
raise _bad_request(str(exc)) from exc
except ConfigFileNotFoundError:
raise _not_found(name) from None
except ConfigFileWriteError as exc:
raise _bad_request(str(exc)) from exc
except ConfigDirError as exc:
raise _service_unavailable(str(exc)) from exc
# ---------------------------------------------------------------------------
# Parsed action endpoints (Task 3.1)
# ---------------------------------------------------------------------------
@router.get(
"/actions/{name}/parsed",
response_model=ActionConfig,
summary="Return an action file parsed into a structured model",
)
async def get_parsed_action(
request: Request,
_auth: AuthDep,
name: _NamePath,
) -> ActionConfig:
"""Parse an action definition file and return its structured fields.
The file is read from ``action.d/``, parsed as fail2ban INI format, and
returned as a :class:`~app.models.config.ActionConfig` JSON object. This
is the input model for the form-based action editor (Task 3.3).
Args:
request: Incoming request.
_auth: Validated session.
name: Base name (e.g. ``iptables`` or ``iptables.conf``).
Returns:
:class:`~app.models.config.ActionConfig`.
Raises:
HTTPException: 400 if *name* is unsafe.
HTTPException: 404 if the file does not exist.
HTTPException: 503 if the config directory is unavailable.
"""
config_dir: str = request.app.state.settings.fail2ban_config_dir
try:
return await file_config_service.get_parsed_action_file(config_dir, name)
except ConfigFileNameError as exc:
raise _bad_request(str(exc)) from exc
except ConfigFileNotFoundError:
raise _not_found(name) from None
except ConfigDirError as exc:
raise _service_unavailable(str(exc)) from exc
@router.put(
"/actions/{name}/parsed",
status_code=status.HTTP_204_NO_CONTENT,
summary="Update an action file from a structured model",
)
async def update_parsed_action(
request: Request,
_auth: AuthDep,
name: _NamePath,
body: ActionConfigUpdate,
) -> None:
"""Apply a partial structured update to an action definition file.
Fields set to ``null`` in the request body are left unchanged. The file is
re-serialized to fail2ban INI format after merging.
Args:
request: Incoming request.
_auth: Validated session.
name: Base name of the action to update.
body: Partial :class:`~app.models.config.ActionConfigUpdate`.
Raises:
HTTPException: 400 if *name* is unsafe or content exceeds the size limit.
HTTPException: 404 if the file does not exist.
HTTPException: 503 if the config directory is unavailable.
"""
config_dir: str = request.app.state.settings.fail2ban_config_dir
try:
await file_config_service.update_parsed_action_file(config_dir, name, body)
except ConfigFileNameError as exc:
raise _bad_request(str(exc)) from exc
except ConfigFileNotFoundError:
raise _not_found(name) from None
except ConfigFileWriteError as exc:
raise _bad_request(str(exc)) from exc
except ConfigDirError as exc:
raise _service_unavailable(str(exc)) from exc
# ---------------------------------------------------------------------------
# Parsed jail file endpoints (Task 6.1)
# ---------------------------------------------------------------------------
@router.get(
"/jail-files/{filename}/parsed",
response_model=JailFileConfig,
summary="Return a jail.d file parsed into a structured model",
)
async def get_parsed_jail_file(
request: Request,
_auth: AuthDep,
filename: _NamePath,
) -> JailFileConfig:
"""Parse a jail.d config file and return its structured fields.
The file is read from ``jail.d/``, parsed as fail2ban INI format, and
returned as a :class:`~app.models.config.JailFileConfig` JSON object. This
is the input model for the form-based jail file editor (Task 6.2).
Args:
request: Incoming request.
_auth: Validated session.
filename: Filename including extension (e.g. ``sshd.conf``).
Returns:
:class:`~app.models.config.JailFileConfig`.
Raises:
HTTPException: 400 if *filename* is unsafe.
HTTPException: 404 if the file does not exist.
HTTPException: 503 if the config directory is unavailable.
"""
config_dir: str = request.app.state.settings.fail2ban_config_dir
try:
return await file_config_service.get_parsed_jail_file(config_dir, filename)
except ConfigFileNameError as exc:
raise _bad_request(str(exc)) from exc
except ConfigFileNotFoundError:
raise _not_found(filename) from None
except ConfigDirError as exc:
raise _service_unavailable(str(exc)) from exc
@router.put(
"/jail-files/{filename}/parsed",
status_code=status.HTTP_204_NO_CONTENT,
summary="Update a jail.d file from a structured model",
)
async def update_parsed_jail_file(
request: Request,
_auth: AuthDep,
filename: _NamePath,
body: JailFileConfigUpdate,
) -> None:
"""Apply a partial structured update to a jail.d config file.
Fields set to ``null`` in the request body are left unchanged. The file is
re-serialized to fail2ban INI format after merging.
Args:
request: Incoming request.
_auth: Validated session.
filename: Filename including extension (e.g. ``sshd.conf``).
body: Partial :class:`~app.models.config.JailFileConfigUpdate`.
Raises:
HTTPException: 400 if *filename* is unsafe or content exceeds size limit.
HTTPException: 404 if the file does not exist.
HTTPException: 503 if the config directory is unavailable.
"""
config_dir: str = request.app.state.settings.fail2ban_config_dir
try:
await file_config_service.update_parsed_jail_file(config_dir, filename, body)
except ConfigFileNameError as exc:
raise _bad_request(str(exc)) from exc
except ConfigFileNotFoundError:
raise _not_found(filename) from None
except ConfigFileWriteError as exc:
raise _bad_request(str(exc)) from exc
except ConfigDirError as exc:
raise _service_unavailable(str(exc)) from exc
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