65 lines
2.3 KiB
Python
65 lines
2.3 KiB
Python
from fastapi import FastAPI, UploadFile, File, Form, HTTPException
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from fastapi.responses import StreamingResponse, JSONResponse
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from core.renderer import ExcelRenderer
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import io
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import logging
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# Configure logging
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logging.basicConfig(level=logging.INFO)
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logger = logging.getLogger(__name__)
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app = FastAPI(
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title="Excel2Pic API",
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description="A lightweight service to convert Excel sheets to images.",
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version="0.1.0"
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)
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@app.post("/api/v1/convert", summary="Convert Excel to Image")
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async def convert_excel(
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file: UploadFile = File(..., description="The Excel file to convert"),
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sheet_name: str = Form(None, description="Name of the sheet to convert (optional, defaults to active sheet)"),
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scale: int = Form(3, description="Scaling factor for high-DPI rendering (default 3, best for mobile/retina screens)"),
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):
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"""
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Convert an uploaded Excel file to a PNG image.
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"""
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# Validation
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if not file.filename.endswith(('.xlsx', '.xls')):
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raise HTTPException(status_code=400, detail="Invalid file format. Please upload .xlsx or .xls file.")
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try:
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# Read file content
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contents = await file.read()
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# Initialize Renderer
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# Note: In a real deployment, font paths might come from env vars
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renderer = ExcelRenderer(contents)
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# Render
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# Use scale parameter
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image_bytes = renderer.render_to_bytes(sheet_name=sheet_name, scale=scale)
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# Return as streaming response
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# Handle Chinese filenames in Content-Disposition
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from urllib.parse import quote
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filename = file.filename.split('.')[0] + ".png"
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encoded_filename = quote(filename)
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return StreamingResponse(
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io.BytesIO(image_bytes),
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media_type="image/png",
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headers={"Content-Disposition": f"inline; filename*=utf-8''{encoded_filename}"}
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)
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except ValueError as ve:
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# Often raised when sheet name is not found
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logger.warning(f"Value Error: {str(ve)}")
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raise HTTPException(status_code=400, detail=str(ve))
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except Exception as e:
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logger.error(f"Internal Server Error: {str(e)}", exc_info=True)
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raise HTTPException(status_code=500, detail=f"An error occurred during conversion: {str(e)}")
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@app.get("/health", summary="Health Check")
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def health_check():
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return {"status": "ok"}
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