curo1305
0b92db87d1
StreamingResponse + forwarded content-length header was causing a content-length mismatch (chunked vs explicit length), which made axios reject the response even though doc-service had already saved the file. Switch to Response, strip content-length/content-type from forwarded response headers (FastAPI recalculates them correctly), and strip accept-encoding from forwarded requests to prevent decompression mismatches. Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
90 lines
2.6 KiB
Python
90 lines
2.6 KiB
Python
"""
|
|
Proxy all /api/documents/* requests to doc-service:8001/documents/*.
|
|
|
|
Uses a module-level AsyncClient for connection pooling.
|
|
Strips hop-by-hop headers that must not be forwarded.
|
|
"""
|
|
import os
|
|
|
|
import httpx
|
|
from fastapi import APIRouter, Depends, HTTPException, Request
|
|
from fastapi.responses import Response
|
|
|
|
from app.deps import get_current_user
|
|
from app.models.user import User
|
|
|
|
DOC_SERVICE_URL = os.environ.get("DOC_SERVICE_URL", "http://doc-service:8001")
|
|
|
|
_client = httpx.AsyncClient(base_url=DOC_SERVICE_URL, timeout=120.0)
|
|
|
|
router = APIRouter()
|
|
|
|
# Headers that must not be forwarded in either direction.
|
|
# Also strip accept-encoding so doc-service never compresses responses —
|
|
# httpx decompresses transparently but the content-encoding header would
|
|
# then mismatch the already-decompressed body we forward to the browser.
|
|
_HOP_BY_HOP = frozenset([
|
|
"connection",
|
|
"keep-alive",
|
|
"proxy-authenticate",
|
|
"proxy-authorization",
|
|
"te",
|
|
"trailers",
|
|
"transfer-encoding",
|
|
"upgrade",
|
|
"host",
|
|
"accept-encoding",
|
|
])
|
|
|
|
# Additional response headers we let FastAPI recalculate rather than forward.
|
|
# content-length is set automatically from the response body size.
|
|
# content-type is set via the media_type argument, so strip it from headers
|
|
# to avoid duplicates.
|
|
_STRIP_RESPONSE = frozenset([*_HOP_BY_HOP, "content-length", "content-type"])
|
|
|
|
|
|
def _forward_headers(request: Request, user_id: str) -> dict:
|
|
headers = {
|
|
k: v
|
|
for k, v in request.headers.items()
|
|
if k.lower() not in _HOP_BY_HOP
|
|
}
|
|
headers["x-user-id"] = user_id
|
|
return headers
|
|
|
|
|
|
@router.api_route("", methods=["GET", "POST"])
|
|
@router.api_route("/{path:path}", methods=["GET", "POST", "PUT", "PATCH", "DELETE"])
|
|
async def proxy_documents(
|
|
request: Request,
|
|
current_user: User = Depends(get_current_user),
|
|
path: str = "",
|
|
) -> Response:
|
|
url = f"/documents/{path}" if path else "/documents"
|
|
headers = _forward_headers(request, str(current_user.id))
|
|
body = await request.body()
|
|
|
|
try:
|
|
response = await _client.request(
|
|
method=request.method,
|
|
url=url,
|
|
headers=headers,
|
|
content=body,
|
|
params=dict(request.query_params),
|
|
)
|
|
except httpx.RequestError as exc:
|
|
raise HTTPException(status_code=502, detail=f"doc-service unreachable: {exc}")
|
|
|
|
resp_headers = {
|
|
k: v
|
|
for k, v in response.headers.items()
|
|
if k.lower() not in _STRIP_RESPONSE
|
|
}
|
|
|
|
return Response(
|
|
content=response.content,
|
|
status_code=response.status_code,
|
|
headers=resp_headers,
|
|
media_type=response.headers.get("content-type"),
|
|
)
|