Uploading file in python flask
Question
I am trying to incorporate uploading a basic text/csv file on my web app which runs flask to handle http requests. I tried to follow the baby example in flasks documentation running on localhost here . But when I try this code on my page it seems to upload but then just hangs and in fact my flask server freezes and I have to close terminal to try again...Ctrl+C doesn't even work.
I execute run.py :
#!/usr/bin/env python
from app import app
if __name__ == '__main__':
app.run(host='0.0.0.0', port=5000, debug=False, use_reloader=False)
and app is a directory in the same directory where run.py is with the following __init__.py :
import os
from flask import Flask
from werkzeug import secure_filename
#Flask object initialization
#app flask object has to be created before importing views below
#because it calls "import app from app"
UPLOAD_FOLDER = '/csv/upload'
ALLOWED_EXTENSIONS = set(['txt', 'csv'])
app = Flask(__name__)
app.config['UPLOAD_FOLDER'] = UPLOAD_FOLDER
and here is my views.py file which has all my routes:
from flask import render_template, request, redirect, url_for
from app import app
import os
#File extension checking
def allowed_filename(filename):
return '.' in filename and filename.rsplit('.',1)[1] in ALLOWED_EXTENSIONS
@app.route('/', methods=['GET', 'POST'])
@app.route('/index.html', methods=['GET', 'POST'])
def index():
if request.method == 'POST':
submitted_file = request.files['file']
if submitted_file and allowed_filename(submitted_file):
filename = secure_filename(submitted_file.filename)
submitted_file.save(os.path.join(app.config['UPLOAD_FOLDER'], filename))
return redirect(url_for('uploaded_file', filename=filename))
return '''
<!doctype html>
<title>Upload new File</title>
<h1>Upload new File</h1>
<form action="" method=post enctype=multipart/form-data>
<p><input type=file name=file>
<input type=submit value=Upload>
</form>
'''
2 answers
solution1
2 ACCPTED 2015-06-23 21:06:14
The problem is that you're passing the wrong thing to allowed_filename() . You should be passing submitted_file.filename not submitted_file itself
solution2
0 2020-01-08 22:21:00
There's a library* to handle file uploads with Flask:
https://github.com/joegasewicz/flask-file-upload
- disclaimer - I'm the author.
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