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c91c7db 3493993 c91c7db 3493993 c91c7db 3493993 c91c7db e1104b3 c91c7db 3493993 c91c7db 3493993 e1104b3 3493993 e1104b3 3493993 e1104b3 c91c7db | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 | from __future__ import annotations
import time
from typing import Any
from uuid import uuid4
from fastapi import Request
from fastapi.responses import JSONResponse
from starlette.middleware.base import BaseHTTPMiddleware, RequestResponseEndpoint
from starlette.responses import Response
from app.core.config import Settings
from app.core.logger import get_logger
from app.security.audit import AuditService
from app.security.context import AuthContext, auth_context, http_auth_applied
from app.security.errors import ForbiddenError, RateLimitError, UnauthorizedError
from app.security.policy import ScopePolicy
from app.security.rate_limit import APIKeyRateLimiter, RateLimitLease
from app.security.service import APIKeyService
logger = get_logger(__name__)
class APIKeyAuthenticationMiddleware(BaseHTTPMiddleware):
"""Authenticates, authorizes, rate-limits, and audits protected HTTP requests."""
def __init__(
self,
app: Any,
*,
settings: Settings,
api_keys: APIKeyService,
rate_limiter: APIKeyRateLimiter,
audit: AuditService,
) -> None:
super().__init__(app)
self.settings = settings
self.api_keys = api_keys
self.rate_limiter = rate_limiter
self.audit = audit
self.policy = ScopePolicy()
async def dispatch(self, request: Request, call_next: RequestResponseEndpoint) -> Response:
if not getattr(request.state, "request_id", None):
request.state.request_id = str(uuid4())
if not self.settings.auth_enabled or self.policy.is_public(request):
return await call_next(request)
started = time.monotonic()
context: AuthContext | None = None
lease: RateLimitLease | None = None
context_token = None
http_auth_token = None
response_code = 500
bytes_uploaded = self._content_length(request.headers.get("content-length"))
bytes_downloaded = 0
try:
api_key = self._bearer_token(request.headers.get("authorization"))
context = await self.api_keys.authenticate(api_key)
request.state.auth = context
context_token = auth_context.set(context)
required_scope = await self.policy.required_scope(request)
lease = await self.rate_limiter.acquire(
context,
is_job=self.policy.is_job(required_scope)
or request.url.path.startswith("/v1/projects/")
and "/renders" in request.url.path
and request.method == "POST",
is_upload=self.policy.is_upload(request, required_scope),
uploaded_bytes=bytes_uploaded,
)
if context.membership_role == "viewer" and required_scope not in {
"templates:read",
"operations:read",
"jobs:read",
"assets:read",
"mcp:read",
"system:read",
"social:accounts:read",
"social:posts:read",
"social:schedules:read",
"social:analytics:read",
"analytics:read",
"generation:providers:read",
"generation:requests:read",
"ai:read",
"copilot:read",
"projects:read",
"members:read",
"teams:read",
"projects:collaborate",
"comments:read",
"approvals:read",
}:
raise ForbiddenError
self.api_keys.authorize(context, required_scope)
await self._apply_social_rate_limit(request, context)
await self.api_keys.mark_used(context)
http_auth_token = http_auth_applied.set(True)
response = await call_next(request)
response_code = response.status_code
bytes_downloaded = self._content_length(response.headers.get("content-length"))
response.headers.setdefault("X-Request-ID", request.state.request_id)
return response
except UnauthorizedError:
response_code = 401
return self._error(
401,
"Unauthorized",
"Invalid or expired API key.",
request,
{"WWW-Authenticate": "Bearer"},
)
except ForbiddenError:
response_code = 403
response = self._error(403, "Forbidden", "Missing required scope.", request)
bytes_downloaded = len(response.body)
return response
except RateLimitError as exc:
response_code = 429
response = self._error(
429,
"Rate limit exceeded",
"Retry later.",
request,
{"Retry-After": str(exc.retry_after)},
)
bytes_downloaded = len(response.body)
return response
finally:
if lease is not None:
await lease.release()
if http_auth_token is not None:
http_auth_applied.reset(http_auth_token)
if context_token is not None:
auth_context.reset(context_token)
if context is not None:
elapsed_ms = max(0, round((time.monotonic() - started) * 1000))
await self._audit_request(
request,
context,
response_code,
elapsed_ms,
bytes_uploaded,
bytes_downloaded,
)
async def _apply_social_rate_limit(self, request: Request, context: AuthContext) -> None:
path = request.url.path
if path.startswith("/v1/analytics"):
category = "analytics_sync" if path.endswith(("/sync", "/cancel")) else "analytics_read"
limit = (
max(1, self.settings.social_analytics_requests_per_minute // 6)
if category == "analytics_sync"
else self.settings.social_analytics_requests_per_minute
)
await self.rate_limiter.acquire_category(
context,
category,
limit=limit,
window_seconds=60,
)
return
if not path.startswith("/v1/social"):
return
if "/analytics" in path:
await self.rate_limiter.acquire_category(
context,
"social_analytics",
limit=self.settings.social_analytics_requests_per_minute,
window_seconds=60,
)
elif path.endswith("/connect") or path.endswith("/callback") or path.endswith("/refresh"):
await self.rate_limiter.acquire_category(
context,
"social_oauth",
limit=self.settings.social_oauth_requests_per_hour,
window_seconds=3600,
)
elif path.endswith("/publish"):
await self.rate_limiter.acquire_category(
context,
"social_publish",
limit=self.settings.social_publish_requests_per_minute,
window_seconds=60,
)
elif path.endswith("/schedule"):
await self.rate_limiter.acquire_category(
context,
"social_schedule",
limit=self.settings.social_schedule_requests_per_minute,
window_seconds=60,
)
elif path.endswith("/reschedule"):
await self.rate_limiter.acquire_category(
context,
"social_schedule",
limit=self.settings.social_schedule_requests_per_minute,
window_seconds=60,
)
elif path.endswith("/bulk"):
await self.rate_limiter.acquire_category(
context,
"social_bulk",
limit=max(1, self.settings.social_schedule_requests_per_minute // 4),
window_seconds=60,
)
@staticmethod
def _bearer_token(header: str | None) -> str:
if not header:
raise UnauthorizedError
parts = header.strip().split()
if len(parts) != 2 or parts[0].casefold() != "bearer" or not parts[1]:
raise UnauthorizedError
return parts[1]
@staticmethod
def _content_length(value: str | None) -> int:
try:
return max(0, int(value or 0))
except ValueError:
return 0
@staticmethod
def _error(
status_code: int,
error: str,
message: str,
request: Request,
headers: dict[str, str] | None = None,
) -> JSONResponse:
response_headers = dict(headers or {})
request_id = getattr(request.state, "request_id", None)
if request_id:
response_headers["X-Request-ID"] = request_id
return JSONResponse(
{"error": error, "message": message},
status_code=status_code,
headers=response_headers,
)
def _client_ip(self, request: Request) -> str | None:
if self.settings.auth_trust_proxy_headers:
forwarded = request.headers.get("x-forwarded-for")
if forwarded:
return forwarded.split(",", 1)[0].strip()[:64]
return request.client.host[:64] if request.client else None
async def _audit_request(
self,
request: Request,
context: AuthContext,
response_code: int,
elapsed_ms: int,
bytes_uploaded: int,
bytes_downloaded: int,
) -> None:
data = {
"request_id": getattr(request.state, "request_id", "-"),
"api_key_id": context.api_key_id,
"key_name": context.key_name,
"ip_address": self._client_ip(request),
"user_agent": request.headers.get("user-agent", "")[:512] or None,
"endpoint": request.url.path,
"http_method": request.method,
"response_code": response_code,
"processing_time_ms": elapsed_ms,
"bytes_uploaded": bytes_uploaded,
"bytes_downloaded": bytes_downloaded,
}
try:
await self.audit.record(**data)
except Exception:
logger.exception(
"authentication audit persistence failed",
extra={"api_key_id": context.api_key_id},
)
logger.info("authenticated request", extra=data)
|