Accept any multipart file field in /api/v1/extract

main.py

@@ -7,7 +7,7 @@ import uuid
 import time
 import asyncio
 from typing import Dict, Optional
-from fastapi import FastAPI, UploadFile, File, HTTPException, Depends, Header
+from fastapi import FastAPI, UploadFile, File, HTTPException, Depends, Header, Request
 from fastapi.staticfiles import StaticFiles
 from fastapi.responses import FileResponse, JSONResponse
 from fastapi.middleware.cors import CORSMiddleware
@@ -287,6 +287,7 @@ async def upload_and_process(file: UploadFile = File(...)):
 
 @app.post("/api/v1/extract", response_model=ProcessingResult, dependencies=[Depends(get_api_key)])
 async def synchronous_extract(
+    request: Request,
     file: Optional[UploadFile] = File(None),
     document: Optional[UploadFile] = File(None),
     upload: Optional[UploadFile] = File(None),
@@ -297,6 +298,16 @@ async def synchronous_extract(
     """
     # 1. Selection
     selected_file = file or document or upload
+    if not selected_file:
+        try:
+            form = await request.form()
+            for _, value in form.multi_items():
+                if isinstance(value, UploadFile) and value.filename:
+                    selected_file = value
+                    break
+        except Exception:
+            pass
+
     if not selected_file:
         raise HTTPException(
             status_code=400,