How can I handle errors during file uploads in Flask?

How can I handle errors during file uploads in Flask?

You can handle errors in Flask file uploads by using try-except blocks and checking for specific conditions like file type.

What kind of errors should I be looking for?

Common errors include file size limits, unsupported file types, and issues with the upload directory permissions.

Can you show me a code example?

Sure! Here's a simple example:

from flask import Flask, request, flash

app = Flask(__name__)

@app.route('/upload', methods=['POST'])
def upload_file():
    if 'file' not in request.files:
        flash('No file part')
        return 'No file uploaded', 400
    file = request.files['file']
    if file.filename == '':
        flash('No selected file')
        return 'No file selected', 400
    # Add more error handling as needed
    return 'File uploaded successfully!'

What if I want to limit the file size?

You can set a maximum file size in your Flask configuration using app.config['MAX_CONTENT_LENGTH'] = 16 * 1024 * 1024 for a 16MB limit.