I have a list of .zip files on S3 which is dynamically created and passed to flask view /download. My problem doesn't seem to be in looping through this list, but rather in returning a response so that all files from the list are downloaded to users computer. If I have a view return a response it only downloads the first file, as return closes the connection. I have tried a number of things and looked at similar issues (like this one: Boto3 to download all files from a S3 Bucket ), but so far had no luck in resolving this. I have also looked at streaming (as in here: http://flask.pocoo.org/docs/1.0/patterns/streaming/ ) and tried creating a subfunction which is a generator, but the same issue persists as I still have to pass a return value to View function - here is that last code example:
@app.route('/download', methods=['POST'])
def download():
download=[]
download = request.form.getlist('checked')
def generate(result):
s3_resource = boto3.resource('s3')
my_bucket = s3_resource.Bucket(S3_BUCKET)
d_object = my_bucket.Object(result).get()
yield d_object['Body'].read()
for filename in download:
return Response (generate(filename), mimetype='application/zip', headers={'Content-Disposition': 'attachment;filename=' + filename})
What would be the best way of doing this so that all the files are downloaded? Is there an easier way to pass a list to boto3 or any other flask module to download those files?
