app.py

# Copyright 2014 Abid Hasan Mujtaba
# 
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
# 
#     http://www.apache.org/licenses/LICENSE-2.0
# 
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.

# Author: Abid H. Mujtaba
# Email: abid.naqvi83@gmail.com
# Date: 2014-02-15

"""
This application is meant to be run by uwsgi. It handles requests by returning a status code and HTML content which it
 generates using Jinja2 template:

 Source:

    http://kagerato.net/articles/software/libraries/jinja-quickstart.html
"""

import jinja2
import os


def application(env, start_response):
    
    ROOT_PATH = "CWD"       # These two values are filled in by an sed substitution on installation
    ROOT_URL = "HOST"


    MEDIA_PATH = ROOT_PATH + "/media"

    media = [f for f in os.listdir(MEDIA_PATH) if os.path.isfile( os.path.join(MEDIA_PATH, f) )]        # Get a (alphabetically) sorted list of all files (not folders) in the media folder
    media.sort()

    start_response('200 OK', [('Content-Type', 'text/html')])

    TEMPLATE_FILE = ROOT_PATH + "/index.html"        # Absolute Path to template
    MEDIA_URL_PATH = ROOT_URL + "/media/"

    templateLoader = jinja2.FileSystemLoader("/")        # We will be serving a template from the same folder as this script
    templateEnv = jinja2.Environment(loader=templateLoader, trim_blocks=True, lstrip_blocks=True)       # We pass in information for removing extraneous whitespace from the rendered text

    template = templateEnv.get_template(TEMPLATE_FILE)

    output = template.render({"media": media, "media_path": MEDIA_URL_PATH, "root_path": ROOT_PATH})

    return str(output)      # The output has to be explicitly cast as a string for this to work