163 lines
5.4 KiB
Python
163 lines
5.4 KiB
Python
from fastapi import FastAPI, UploadFile, File, HTTPException, Request
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from fastapi.middleware.cors import CORSMiddleware
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from fastapi.responses import StreamingResponse, JSONResponse, PlainTextResponse
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from typing import List, Optional
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import io
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import os
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import asyncio
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import uvicorn
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from dotenv import load_dotenv
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load_dotenv()
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from complete_pipeline_adapter import process_images_to_rows,rows_to_csv_bytes
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app = FastAPI(
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title="Payment OCR Services API",
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description="FastAPI wrapper around the OCR pipeline (Google Vision + deskew + line grouping + extraction).",
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version="1.0.0",
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)
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# Concurrency/semaphore (optional but useful for OCR)
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MAX_CONCURRENCY = int(os.getenv("MAX_CONCURRENCY", "2"))
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semaphore = asyncio.Semaphore(MAX_CONCURRENCY)
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active_jobs = 0
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waiting_jobs = 0
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lock = asyncio.Lock()
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# CORS
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cors_origins = os.getenv("CORS_ORIGINS", "*")
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allow_origins = ["*"] if cors_origins.strip() == "*" else [o.strip() for o in cors_origins.split(",") if o.strip()]
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app.add_middleware(
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CORSMiddleware,
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allow_origins=allow_origins,
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allow_methods=["*"],
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allow_headers=["*"],
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)
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ALLOWED_EXTS = {".jpg", ".jpeg", ".png", ".tif", ".tiff", ".bmp"}
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# -------------------------------------------------
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# Health + status
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# -------------------------------------------------
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@app.get("/health", response_class=PlainTextResponse)
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def health():
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creds = os.environ.get("GOOGLE_APPLICATION_CREDENTIALS", "")
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return f"OK | GOOGLE_APPLICATION_CREDENTIALS set: {bool(creds)}"
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@app.get("/status")
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async def get_status():
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async with lock:
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return {
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"active_jobs": active_jobs,
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"queued_jobs": waiting_jobs,
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"max_concurrency": MAX_CONCURRENCY,
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"status": "busy" if active_jobs > 0 or waiting_jobs > 0 else "idle",
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}
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# -------------------------------------------------
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# Helpers
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# -------------------------------------------------
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def _validate_files(files: List[UploadFile]):
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if not files:
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raise HTTPException(status_code=400, detail="No files provided.")
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bad = [f.filename for f in files if os.path.splitext(f.filename or "")[1].lower() not in ALLOWED_EXTS]
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if bad:
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raise HTTPException(
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status_code=415,
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detail=f"Unsupported file types: {', '.join(bad)}. Allowed: {', '.join(sorted(ALLOWED_EXTS))}"
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)
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# -------------------------------------------------
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# Endpoints
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# -------------------------------------------------
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@app.post("/extract/json")
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async def extract_json(files: List[UploadFile] = File(...)):
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_validate_files(files)
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async with lock:
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global waiting_jobs
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waiting_jobs += 1
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async with semaphore:
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async with lock:
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waiting_jobs -= 1
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global active_jobs
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active_jobs += 1
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try:
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blobs = [await f.read() for f in files]
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names = [f.filename or "upload.bin" for f in files]
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rows = process_images_to_rows(blobs, names) # calls pipeline
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return JSONResponse(content={"rows": rows})
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except Exception as e:
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raise HTTPException(status_code=500, detail=f"Processing error: {e}")
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finally:
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async with lock:
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active_jobs -= 1
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@app.post("/extract/csvtext", response_class=PlainTextResponse)
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async def extract_csvtext(files: List[UploadFile] = File(...)):
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_validate_files(files)
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async with lock:
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global waiting_jobs
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waiting_jobs += 1
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async with semaphore:
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async with lock:
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waiting_jobs -= 1
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global active_jobs
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active_jobs += 1
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try:
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blobs = [await f.read() for f in files]
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names = [f.filename or "upload.bin" for f in files]
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rows = process_images_to_rows(blobs, names)
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csv_bytes = rows_to_csv_bytes(rows)
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return PlainTextResponse(csv_bytes.decode("utf-8"), media_type="text/csv")
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except Exception as e:
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raise HTTPException(status_code=500, detail=f"Processing error: {e}")
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finally:
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async with lock:
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active_jobs -= 1
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@app.post("/extract/csv")
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async def extract_csv(files: List[UploadFile] = File(...), filename: Optional[str] = None):
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_validate_files(files)
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async with lock:
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global waiting_jobs
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waiting_jobs += 1
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async with semaphore:
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async with lock:
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waiting_jobs -= 1
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global active_jobs
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active_jobs += 1
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try:
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blobs = [await f.read() for f in files]
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names = [f.filename or "upload.bin" for f in files]
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rows = process_images_to_rows(blobs, names)
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csv_bytes = rows_to_csv_bytes(rows)
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out_name = filename or "medical_billing_extract.csv"
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return StreamingResponse(
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io.BytesIO(csv_bytes),
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media_type="text/csv",
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headers={"Content-Disposition": f'attachment; filename="{out_name}"'}
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)
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except Exception as e:
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raise HTTPException(status_code=500, detail=f"Processing error: {e}")
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finally:
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async with lock:
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active_jobs -= 1
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# -------------------------------------------------
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# Entrypoint (same pattern as your selenium app)
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# -------------------------------------------------
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if __name__ == "__main__":
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host = os.getenv("HOST")
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port = int(os.getenv("PORT"))
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uvicorn.run(app, host=host, port=port)
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