Even if I uploaded HTML with boto3, it was not recognized as HTML

Event

When I access the HTML uploaded by boto3, which is a library for playing with aws, it becomes a file download.

Solution

import boto3

s3 = boto3.resource('s3')
s3.Bucket(<<bucket_name>>).upload_file(
  'file name',
  'file name',
  ExtraArgs={'ContentType': 'text/html', 'ACL': 'public-read'})

Specify ContentType text / html with ExtraArgs.