how to upload image file as binary to azure storage account in python

I have this code below which as of now does not upload image file that it receives from the client. It receives the image file as an UploadFile instance. I have read that using the read() method will convert the file to bytes and that way I will be able to upload, but that didn't work for me. Not sure that what I am doing wrong here.

async def resolve_fileUpload(_, info, file):
    print(f"File - {type(file)}")

    container_client = blob_service_client.get_container_client(
        '4160000000')
    if not container_client.exists():
        container_client.create_container()

    with open(file, "rb") as file:
        result = container_client.upload_blob(
            name='avatar', data=file.read())
    return {
        "status": 200,
        "error": "",
        "fileUrl": "www.test.com"
    }

Any help is greatly appreciated as I am stuck on this for days now.

I tried in my environment and got the below results.

You can follow the below code to achieve your goal to upload images to Azure blob storage.

demo.py

from fastapi import FastAPI, File, UploadFile
from azure.storage.blob import BlobServiceClient
from io import BytesIO

app = FastAPI()

# Initialize Azure Storage Blob Service Client
connection_string = "your-connection-string"
blob_service_client = BlobServiceClient.from_connection_string(connection_string)

@app.post("/upload")
async def resolve_fileUpload(file: UploadFile = File(...)):
    print(f"File - {type(file)}")

    container_client = blob_service_client.get_container_client('test')
    if not container_client.exists():
        container_client.create_container()

    file_bytes = await file.read()  # Read the file content as bytes

    with BytesIO(file_bytes) as byte_stream:
        result = container_client.upload_blob(name='avatar/avatar.jpg', data=byte_stream)

    return {
        "status": 200,
        "error": "",
        "fileUrl": "www.test.com"
    }

Install uvicorn using pip install uvicorn

Run the above file using uvicorn <yourpythonfilename>:app --reload

Once you execute with above command in your terminal you will get like below.

Now, create another python file test.py with the below code:

    import requests
    
    url = "http://127.0.0.1:8000/upload"
    files = {'file': open('path/to/file.jpg', 'rb')}
    response = requests.post(url, files=files)
    print(response.status_code, response.text)

Output:

Portal:

MS Docs indicate that upload_blob needs a file I/O object, not the actual bytes. From: https://learn.microsoft.com/en-us/azure/storage/blobs/storage-blob-upload-python#upload-a-block-blob-from-a-local-file-path

Try changing your code to just pass the Reader object, instead of the data.

with open(file, "rb") as file:
    result = container_client.upload_blob(
        name='avatar', data=file)