"""FastAPI route handlers.""" import os import shutil import tempfile import time import traceback import uuid from pathlib import Path from fastapi import APIRouter, BackgroundTasks, Depends, HTTPException, Request from fastapi.responses import HTMLResponse, StreamingResponse from loguru import logger from config.settings import Settings from providers.common import get_user_facing_error_message from providers.exceptions import InvalidRequestError, ProviderError from .dependencies import get_provider_for_type, get_settings, require_api_key from .models.anthropic import MessagesRequest, TokenCountRequest from .models.responses import TokenCountResponse from .optimization_handlers import try_optimizations from .request_utils import get_token_count router = APIRouter() def _home_page_html(status_payload: dict[str, str]) -> str: """Render the home page HTML with the factory reset button.""" return f""" Claude Code Proxy

Claude Code Proxy

Server is running.

Status: {status_payload['status']} Provider: {status_payload['provider']} Model: {status_payload['model']}

""" def _clear_path(path: Path) -> int: """Best-effort removal of a file/directory path. Returns removed item count.""" if not path.exists(): return 0 try: if path.is_dir(): shutil.rmtree(path) else: path.unlink() return 1 except Exception as e: logger.warning("Failed to remove path {}: {}", path, e) return 0 def _clear_workspace_contents(workspace: Path) -> int: """Best-effort clear of workspace contents while preserving root directory.""" if not workspace.exists() or not workspace.is_dir(): return 0 removed = 0 for child in workspace.iterdir(): removed += _clear_path(child) return removed def _clear_runtime_state(settings: Settings) -> dict[str, int]: """Clear runtime caches/workspace data for a lightweight factory reset.""" removed = { "workspace_items": 0, "cache_dirs": 0, "pycache_dirs": 0, } workspace = Path(settings.claude_workspace).expanduser().resolve() removed["workspace_items"] = _clear_workspace_contents(workspace) cache_dirs = [ Path.home() / ".cache" / "huggingface", Path.home() / ".cache" / "uv", Path.home() / ".cache" / "pip", Path(tempfile.gettempdir()) / "huggingface", ] for cache_dir in cache_dirs: removed["cache_dirs"] += _clear_path(cache_dir) project_root = Path.cwd() for pycache_dir in project_root.rglob("__pycache__"): if ".venv" in pycache_dir.parts: continue removed["pycache_dirs"] += _clear_path(pycache_dir) return removed def _restart_process() -> None: """Terminate process so container orchestrator restarts the app.""" logger.warning("Factory reset requested: restarting process") time.sleep(1.0) os._exit(0) # ============================================================================= # Routes # ============================================================================= @router.post("/v1/messages") async def create_message( request_data: MessagesRequest, raw_request: Request, settings: Settings = Depends(get_settings), _auth=Depends(require_api_key), ): """Create a message (always streaming).""" try: if not request_data.messages: raise InvalidRequestError("messages cannot be empty") optimized = try_optimizations(request_data, settings) if optimized is not None: return optimized logger.debug("No optimization matched, routing to provider") # Resolve provider from the model-aware mapping provider_type = Settings.parse_provider_type( request_data.resolved_provider_model or settings.model ) provider = get_provider_for_type(provider_type) request_id = f"req_{uuid.uuid4().hex[:12]}" logger.info( "API_REQUEST: request_id={} model={} messages={}", request_id, request_data.model, len(request_data.messages), ) logger.debug("FULL_PAYLOAD [{}]: {}", request_id, request_data.model_dump()) input_tokens = get_token_count( request_data.messages, request_data.system, request_data.tools ) return StreamingResponse( provider.stream_response( request_data, input_tokens=input_tokens, request_id=request_id, ), media_type="text/event-stream", headers={ "X-Accel-Buffering": "no", "Cache-Control": "no-cache", "Connection": "keep-alive", }, ) except ProviderError: raise except Exception as e: logger.error(f"Error: {e!s}\n{traceback.format_exc()}") raise HTTPException( status_code=getattr(e, "status_code", 500), detail=get_user_facing_error_message(e), ) from e @router.post("/v1/messages/count_tokens") async def count_tokens(request_data: TokenCountRequest, _auth=Depends(require_api_key)): """Count tokens for a request.""" request_id = f"req_{uuid.uuid4().hex[:12]}" with logger.contextualize(request_id=request_id): try: tokens = get_token_count( request_data.messages, request_data.system, request_data.tools ) logger.info( "COUNT_TOKENS: request_id={} model={} messages={} input_tokens={}", request_id, getattr(request_data, "model", "unknown"), len(request_data.messages), tokens, ) return TokenCountResponse(input_tokens=tokens) except Exception as e: logger.error( "COUNT_TOKENS_ERROR: request_id={} error={}\n{}", request_id, get_user_facing_error_message(e), traceback.format_exc(), ) raise HTTPException( status_code=500, detail=get_user_facing_error_message(e) ) from e @router.get("/") async def root( request: Request, settings: Settings = Depends(get_settings), _auth=Depends(require_api_key), ): """Root endpoint (JSON for API clients, HTML for browsers).""" payload = { "status": "ok", "provider": settings.provider_type, "model": settings.model, } accept = request.headers.get("accept", "") if "__sign" in request.query_params or "text/html" in accept.lower(): return HTMLResponse(content=_home_page_html(payload)) return payload @router.get("/health") async def health(): """Health check endpoint.""" return {"status": "healthy"} @router.post("/stop") async def stop_cli(request: Request, _auth=Depends(require_api_key)): """Stop all CLI sessions and pending tasks.""" handler = getattr(request.app.state, "message_handler", None) if not handler: # Fallback if messaging not initialized cli_manager = getattr(request.app.state, "cli_manager", None) if cli_manager: await cli_manager.stop_all() logger.info("STOP_CLI: source=cli_manager cancelled_count=N/A") return {"status": "stopped", "source": "cli_manager"} raise HTTPException(status_code=503, detail="Messaging system not initialized") count = await handler.stop_all_tasks() logger.info("STOP_CLI: source=handler cancelled_count={}", count) return {"status": "stopped", "cancelled_count": count} @router.get("/admin/factory-reset", response_class=HTMLResponse) async def factory_reset_page(request: Request, _auth=Depends(require_api_key)): """Simple admin UI for one-click factory reset and restart.""" return """ Factory Reset

Factory Reset & Restart

Clears runtime cache and workspace data, then restarts this server.

""" @router.post("/admin/factory-reset") async def factory_reset( background_tasks: BackgroundTasks, settings: Settings = Depends(get_settings), _auth=Depends(require_api_key), ): """Clear runtime state and restart process (for Space maintenance).""" cleared = _clear_runtime_state(settings) background_tasks.add_task(_restart_process) return { "status": "restarting", "cleared": cleared, }