flask get uploaded file size

To get the uploaded file size in Flask, you can follow these steps:

  1. Import the necessary modules: In your Flask application, you'll need to import the Flask class and the request object from the flask module. The request object allows you to access the details of the current request.

  2. Create a route to handle the file upload: Use the @app.route decorator to create a route that will handle the file upload. This route should have the appropriate methods specified (e.g., POST).

  3. Access the uploaded file: Use the request.files attribute to access the uploaded file. This attribute provides a dictionary-like object that contains all the uploaded files. You can access a specific file using its name as the key.

  4. Get the file size: Use the content_length attribute of the uploaded file to get its size. This attribute returns the size of the file in bytes.

  5. Return the file size: You can return the file size as a response to the client or store it in a variable for further processing.

Here's an example code snippet that demonstrates these steps:

from flask import Flask, request

app = Flask(__name__)

@app.route('/upload', methods=['POST'])
def upload():
    uploaded_file = request.files['file']
    file_size = uploaded_file.content_length
    return f'The file size is {file_size} bytes.'

In this example, the upload function handles the file upload. It accesses the uploaded file using request.files['file'] and gets its size using uploaded_file.content_length. It then returns the file size as a response.

Remember to replace 'file' with the actual name of the file input field in your HTML form.

I hope this explanation helps! Let me know if you have any further questions.