298 lines
12 KiB
Python
298 lines
12 KiB
Python
"""
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Subscription Middleware - Enforces subscription limits and feature access
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"""
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import re
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import json
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import structlog
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from fastapi import Request, Response, HTTPException
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from fastapi.responses import JSONResponse
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from starlette.middleware.base import BaseHTTPMiddleware
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import httpx
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from typing import Dict, Any, Optional
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import asyncio
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from app.core.config import settings
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logger = structlog.get_logger()
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class SubscriptionMiddleware(BaseHTTPMiddleware):
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"""Middleware to enforce subscription-based access control"""
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def __init__(self, app, tenant_service_url: str):
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super().__init__(app)
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self.tenant_service_url = tenant_service_url.rstrip('/')
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# Define route patterns that require subscription validation
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self.protected_routes = {
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# Analytics routes - require different levels based on actual app routes
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r'/api/v1/tenants/[^/]+/analytics/.*': {
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'feature': 'analytics',
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'minimum_level': 'basic' # Changed to basic to allow all tiers access to analytics
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},
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r'/api/v1/tenants/[^/]+/forecasts/.*': {
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'feature': 'analytics',
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'minimum_level': 'basic' # Changed to basic to allow all tiers access to forecasting
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},
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r'/api/v1/tenants/[^/]+/predictions/.*': {
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'feature': 'analytics',
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'minimum_level': 'basic' # Changed to basic to allow all tiers access to predictions
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},
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# Training and AI models - Now available to all tiers
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r'/api/v1/tenants/[^/]+/training/.*': {
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'feature': 'analytics',
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'minimum_level': 'basic' # Changed to basic to allow all tiers access to training
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},
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r'/api/v1/tenants/[^/]+/models/.*': {
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'feature': 'analytics',
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'minimum_level': 'basic' # Changed to basic to allow all tiers access to models
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},
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# Advanced production features - Professional+
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r'/api/v1/tenants/[^/]+/production/optimization/.*': {
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'feature': 'analytics',
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'minimum_level': 'basic'
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},
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# Enterprise-only features
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r'/api/v1/tenants/[^/]+/statistics.*': {
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'feature': 'analytics',
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'minimum_level': 'basic' # Advanced stats for Enterprise only
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}
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}
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async def dispatch(self, request: Request, call_next):
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"""Process the request and check subscription requirements"""
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# Skip subscription check for certain routes
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if self._should_skip_subscription_check(request):
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return await call_next(request)
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# Check if route requires subscription validation
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subscription_requirement = self._get_subscription_requirement(request.url.path)
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if not subscription_requirement:
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return await call_next(request)
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# Get tenant ID from request
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tenant_id = self._extract_tenant_id(request)
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if not tenant_id:
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return JSONResponse(
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status_code=400,
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content={
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"error": "subscription_validation_failed",
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"message": "Tenant ID required for subscription validation",
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"code": "MISSING_TENANT_ID"
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}
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)
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# Validate subscription
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validation_result = await self._validate_subscription(
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request,
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tenant_id,
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subscription_requirement['feature'],
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subscription_requirement['minimum_level']
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)
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if not validation_result['allowed']:
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return JSONResponse(
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status_code=403,
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content={
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"error": "subscription_required",
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"message": validation_result['message'],
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"code": "SUBSCRIPTION_UPGRADE_REQUIRED",
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"details": {
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"required_feature": subscription_requirement['feature'],
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"required_level": subscription_requirement['minimum_level'],
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"current_plan": validation_result.get('current_plan', 'unknown'),
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"upgrade_url": "/app/settings/profile"
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}
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}
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)
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# Subscription validation passed, continue with request
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response = await call_next(request)
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return response
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def _should_skip_subscription_check(self, request: Request) -> bool:
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"""Check if subscription validation should be skipped"""
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path = request.url.path
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method = request.method
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# Skip for health checks, auth, and public routes
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skip_patterns = [
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r'/health.*',
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r'/metrics.*',
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r'/api/v1/auth/.*',
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r'/api/v1/subscriptions/.*', # Subscription management itself
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r'/api/v1/tenants/[^/]+/members.*', # Basic tenant info
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r'/docs.*',
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r'/openapi\.json'
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]
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# Skip OPTIONS requests (CORS preflight)
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if method == "OPTIONS":
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return True
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for pattern in skip_patterns:
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if re.match(pattern, path):
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return True
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return False
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def _get_subscription_requirement(self, path: str) -> Optional[Dict[str, str]]:
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"""Get subscription requirement for a given path"""
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for pattern, requirement in self.protected_routes.items():
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if re.match(pattern, path):
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return requirement
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return None
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def _extract_tenant_id(self, request: Request) -> Optional[str]:
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"""Extract tenant ID from request"""
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# Try to get from URL path first
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path_match = re.search(r'/api/v1/tenants/([^/]+)/', request.url.path)
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if path_match:
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return path_match.group(1)
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# Try to get from headers
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tenant_id = request.headers.get('x-tenant-id')
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if tenant_id:
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return tenant_id
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# Try to get from user state (set by auth middleware)
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if hasattr(request.state, 'user') and request.state.user:
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return request.state.user.get('tenant_id')
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return None
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async def _validate_subscription(
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self,
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request: Request,
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tenant_id: str,
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feature: str,
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minimum_level: str
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) -> Dict[str, Any]:
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"""Validate subscription feature access using the same pattern as other gateway services"""
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try:
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# Use the same authentication pattern as gateway routes
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headers = dict(request.headers)
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headers.pop("host", None)
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# Add user context headers if available (same as _proxy_request)
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if hasattr(request.state, 'user') and request.state.user:
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user = request.state.user
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headers["x-user-id"] = str(user.get('user_id', ''))
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headers["x-user-email"] = str(user.get('email', ''))
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headers["x-user-role"] = str(user.get('role', 'user'))
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headers["x-user-full-name"] = str(user.get('full_name', ''))
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headers["x-tenant-id"] = str(user.get('tenant_id', ''))
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# Call tenant service to check subscription with gateway-appropriate timeout
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timeout_config = httpx.Timeout(
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connect=2.0, # Connection timeout - short for gateway
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read=10.0, # Read timeout
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write=2.0, # Write timeout
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pool=2.0 # Pool timeout
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)
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async with httpx.AsyncClient(timeout=timeout_config) as client:
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# Check feature access
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feature_response = await client.get(
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f"{settings.TENANT_SERVICE_URL}/api/v1/subscriptions/{tenant_id}/features/{feature}",
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headers=headers
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)
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if feature_response.status_code != 200:
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logger.warning(
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"Failed to check feature access",
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tenant_id=tenant_id,
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feature=feature,
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status_code=feature_response.status_code,
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response_text=feature_response.text,
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url=f"{settings.TENANT_SERVICE_URL}/api/v1/subscriptions/{tenant_id}/features/{feature}"
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)
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# Fail open for availability (let service handle detailed check if needed)
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return {
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'allowed': True,
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'message': 'Access granted (validation service unavailable)',
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'current_plan': 'unknown'
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}
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feature_data = feature_response.json()
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logger.info("Feature check response",
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tenant_id=tenant_id,
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feature=feature,
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response=feature_data)
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if not feature_data.get('has_feature'):
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return {
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'allowed': False,
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'message': f'Feature "{feature}" not available in your current plan',
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'current_plan': feature_data.get('plan', 'unknown')
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}
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# Check feature level if it's analytics
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if feature == 'analytics':
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feature_level = feature_data.get('feature_value', 'basic')
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if not self._check_analytics_level(feature_level, minimum_level):
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return {
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'allowed': False,
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'message': f'Analytics level "{minimum_level}" required. Current level: "{feature_level}"',
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'current_plan': feature_data.get('plan', 'unknown')
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}
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return {
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'allowed': True,
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'message': 'Access granted',
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'current_plan': feature_data.get('plan', 'unknown')
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}
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except asyncio.TimeoutError:
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logger.error(
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"Timeout validating subscription",
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tenant_id=tenant_id,
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feature=feature
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)
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# Fail open for availability (let service handle detailed check)
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return {
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'allowed': True,
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'message': 'Access granted (validation timeout)',
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'current_plan': 'unknown'
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}
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except httpx.RequestError as e:
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logger.error(
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"Request error validating subscription",
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tenant_id=tenant_id,
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feature=feature,
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error=str(e)
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)
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# Fail open for availability
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return {
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'allowed': True,
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'message': 'Access granted (validation service unavailable)',
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'current_plan': 'unknown'
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}
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except Exception as e:
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logger.error(
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"Subscription validation error",
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tenant_id=tenant_id,
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feature=feature,
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error=str(e)
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)
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# Fail open for availability (let service handle detailed check)
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return {
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'allowed': True,
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'message': 'Access granted (validation error)',
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'current_plan': 'unknown'
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}
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def _check_analytics_level(self, current_level: str, required_level: str) -> bool:
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"""Check if current analytics level meets the requirement"""
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level_hierarchy = {
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'basic': 1,
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'advanced': 2,
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'predictive': 3
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}
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current_rank = level_hierarchy.get(current_level, 0)
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required_rank = level_hierarchy.get(required_level, 0)
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return current_rank >= required_rank |