Why static filename extension "htm" won't parse but instead of downloaded

[kenjican]

 Static web service return send_file('path/filename.htm') . Open in Chrome or Firefox, the HTML page  does not be parsed but downloaded.  

 How do I configure microdot to make suffix 'htm' to be parsed ,not downloaded?

[paroxyste-0]

Hello, would you like to display the contents of the .htm file as an html page in your browser?

from microdot         import Microdot
from microdot.jinja   import Template

app = Microdot()
Template.initialize(template_dir='templates/')

@app.route('/')
def index(request):
    return Template('filename.htm')

Your file must be in templates/filename.htm

[kenjican]

Thank you~~ ,I'll try it and come back. It looks like a workable solution.

[kenjican]

from microdot import Microdot
from jinja import Template

app = Microdot()
Template.initialize(template_dir='/home/kenji/modules/ESP32/config/')

@app.route('/')
def index(request):
    return Template('index.htm')

app.run(port=8888, debug=True)

Code runs with no error in linux , open URL localhost:8888 in Chrome, but Chrome shows blank page and keep loading with no error message. 

in ESP32 micropython, the error message is ImportError: no module named 'jinja2' . mip.install('Jinja2') doesn't find Jinja2 package.

[miguelgrinberg]

The send_file() function does not recognize the htm extension, so it does not assign the correct content type to it. Try either using .html, or else giving the function an explicit content type:

send_file('file.htm", content_type="text/html")

[kenjican]

In ESP32 Micropython v1.23.0 :
.html works. The tiring thing is all the htm suffix have to revise to html. Add content_type is a better idea.
Thanks~