Uploading images in FastAPI post request causes 400 Bad Request [duplicate]

Question

I would like to get image via post request and then read it. I'm trying to do is this way:

import numpy as np from PIL import Image from fastapi import FastAPI, File, UploadFile, HTTPException, Depends app = FastAPI() @app.post("/predict_image") @logger.catch def predict_image(predict_image: UploadFile = File(...)): logger.info('predict_image POST request performed') try: pil_image = np.array(Image.open(predict_image.file)) except: raise HTTPException( status_code=HTTP_422_UNPROCESSABLE_ENTITY, detail="Unable to process file" ) pred = pil_image.shape logger.info('predict_image POST request performed, shape {}'.format(pred)) return {'input_shape': pred}

Calling post request returns INFO: 127.0.0.1:59364 - "POST /predict_image HTTP/1.1" 400 Bad Request

How to fix it?

UPD:

Example from official tutorial return same exception:

@app.post("/uploadfile/") async def create_upload_file(file: UploadFile = File(...)): return {"filename": file.filename}

Marcelo Trylesinski · Accepted Answer · 2020-06-17 16:55:04Z

5

You probably need to install python-multipart.

Just:

pip install python-multipart

answered Jun 17, 2020 at 16:55

Marcelo Trylesinski

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Comments

Rocketq · Accepted Answer · 2020-07-13 12:29:49Z

Fixed this way:

@app.post("/predict_image/") @logger.catch def make_inference(file: bytes = File(...)): try: pil_image = np.array(Image.open(BytesIO(file))) except: raise HTTPException( status_code=HTTP_422_UNPROCESSABLE_ENTITY, detail="Unable to process file" )

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