created a simple sample

.gitignore

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+*~
+*.pyc
+.env
+env
+*.cfg
+*.log
+*.sock
+*.pid

config.cfg.sample

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+pages_root: 'data_sample'
+static_root: 'static'
+default_template: 'page.html'
+url_prefix: "/stuff"
+FLATPAGES_EXTENSION: ".md"
+FLATPAGES_AUTO_RELOAD: True

data/index.md

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+title: title

requirements.txt

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+flask
+Frozen-Flask
+config
+uwsgi
+gevent
+

run.py

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+from simple_sample import app,freezer
+import sys
+
+if __name__ == "__main__":
+    if len(sys.argv) > 1 and sys.argv[1] == "build":
+        freezer.freeze()
+    else:
+        app.run(host='0.0.0.0',port=4444, debug=True)
+

simple_sample.nginx.conf

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+server {
+	listen 80 default_server;
+	listen [::]:80 ;
+	index index.html index.htm index.nginx-debian.html;
+
+	server_name _;
+
+ 	root /var/www/html;
+
+    location / {   
+         include uwsgi_params;
+	 uwsgi_pass unix:///srv/simple_sample_flat_index/uwsgi.sock;
+                           
+}
+
+}

simple_sample.service

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+[Unit]
+Description=uWSGI Simple Sample for Flat Page with Index Default
+After=network.target
+
+[Service]
+User=www-data
+Group=www-data
+WorkingDirectory=/srv/simple_sample_flat_index
+Environment="PATH=/srv/simple_sample_flat_index/.env/bin"
+ExecStart=uwsgi --ini uwsgi.ini
+
+[Install]
+WantedBy=multi-user.target

simple_sample/__init__.py

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+"""
+This module is based on flask_flatpages and creates a website structure based on a file structure. 
+By default the .md extension creates a html website 
+"""
+import logging
+import sys
+from flask import Flask, Blueprint,render_template, send_from_directory,jsonify, url_for
+#from flask_flatpages import FlatPages, pygments_style_defs
+from flatpages_index import FlatPagesIndex
+from flask_frozen import Freezer
+from config import Config
+import os
+import re
+from flatpages_index.utils import  path_depth, page_to_link, page_to_link, file_to_link
+from functools import partial
+#from .flatpages import FileLists
+
+# This is the directory, required for absolute file paths
+package_directory = os.path.dirname(os.path.abspath(__file__))
+# Loading the config file 
+cfg = Config((os.path.join(package_directory, '../config.cfg')))
+
+# Loading constants from config file 
+FLATPAGES_AUTO_RELOAD = cfg.get("FLATPAGES_AUTO_RELOAD",True) # Default can be overwritten by config cfg
+FLATPAGES_EXTENSION = cfg.get("FLATPAGES_EXTENSION",".md") # Default can be overwritten by config cfg
+FLATPAGES_ROOT = os.path.abspath(cfg.pages_root)
+
+
+# Initialize application
+app = Flask(__name__)
+app.config.from_object(__name__)
+
+app.logger.setLevel(logging.DEBUG)
+# Initialize FlatPages Index
+#FlatPagesIndex.FLATPAGES_ROOT=FLATPAGES_ROOT
+flatpages = FlatPagesIndex(app)
+flatpages.get('index')
+
+app.logger.info('Initialize SimpleSample App')
+app.logger.info('flatpages loaded %d pages' % len(flatpages._pages))
+app.logger.info("Data directory is: %s" % flatpages.root)
+app.logger.info("Url prefix;: %s" % cfg.url_prefix)
+app.logger.info("Extensions: %s" % FLATPAGES_EXTENSION)
+
+
+
+
+
+
+freezer = Freezer(app)
+
+
+page_blueprint  = Blueprint('intern', __name__)
+
+@page_blueprint.route('/<path:name>/')
+@page_blueprint.route('/')
+def post(name='index'):
+    page = flatpages.get(name)
+    
+    if not page is None:
+        page.meta["has_img"]=page.meta.get('has_img',True)
+        page=page.load_linklists(partial(url_for,'intern.post'))
+        return render_template(page.meta["template"], post=page,
+                               pth=page.meta["dirpath"])
+
+    if os.path.exists(os.path.join(FLATPAGES_ROOT,name)):
+        return send_from_directory(FLATPAGES_ROOT,name)
+    else:
+        return send_from_directory('static',name)
+
+
+
+
+@page_blueprint.route('/<path:name>.json',strict_slashes=False)
+def postjson(name='index'):
+    page = flatpages.get(name)
+    if not page is None:
+        page.meta["has_img"]=page.meta.get('has_img',True)
+
+        page=page.load_linklists(partial(url_for,'intern.post'))
+        p=page.meta
+
+        p["html"]=page.html
+        return jsonify(page=p)
+    
+    if os.path.exists(u'{}/{}'.format(FLATPAGES_ROOT,path)):
+        return send_from_directory(FLATPAGES_ROOT,path)
+    else:
+        return send_from_directory('static',path)
+
+
+    
+app.register_blueprint(page_blueprint, url_prefix=cfg.url_prefix,static_folder='static')
+app.add_url_rule('%s/<path:name>' % cfg.url_prefix,'page', post)

simple_sample/templates/layout.html

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+{# -*-jinja2-*- #}
+<html>
+  <head></head>
+  <LINK href="https://stackpath.bootstrapcdn.com/bootstrap/4.4.1/css/bootstrap.min.css" rel="stylesheet" type="text/css">
+<body>
+<div class="container">
+  <div class="row">
+    <div class="col-12">
+      <nav class="breadcrumb" style="background-color: #FFF">
+{% for b in post.breadcrumbs %}
+<a href="{#url_for('page',name=b.path)#}{{b.url}}" class="breadcrumb-item">{{b.title}} </a>
+{% endfor %}
+
+      </nav>
+
+      {% block content %}
+      {% endblock %}
+
+
+    </div>
+  </div>
+</div>
+
+</body>
+</html>

simple_sample/templates/page.html

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+{# -*-jinja2-*- #}
+{% extends "layout.html" %}
+{% block content %}
+
+<h1>{{post.title}}</h1>
+{{post.date}}
+{% if post.sub_index_pages | length > 0 %}
+<hr/>
+<b id="up_head"> Unterseiten:  </b>
+<ul class="nav flex-column flex-sm-row " labeledby="up_head">
+  {% for d in post.sub_index_pages %}
+  <li class="nav-item">
+    <a href="{{d.url}}" class="nav-link">
+      <h6> {{d.title}} <small class="text-muted">{{d.desc}} </small> </h6>
+    </a>
+  </li>
+  {% endfor %}
+</ul>
+{% endif %}
+
+{{ post.helloworld() }}
+{{ post.html|safe }}
+
+
+{% if post.sub_pages |length > 0 %}
+<ul class="nav flex-column flex-sm-row" labeledby="inf_head">
+  {% for d in post.sub_pages %}
+    <li class="nav-item">
+      <a href="{{d.url}}" class="nav-link  text-info">
+	<h6> {{d.title}} <small class="text-muted">{{d.desc}} </small>
+	</h6>
+    </a>
+      
+    </li>
+  {% endfor %}
+</ul>
+{% endif %}
+
+{% if post.list_files |length > 0 %}
+
+<hr/>
+
+<b id="inf_head">Files:</b>
+<ul>
+  {% for d in post.list_files %}
+    <li>
+      <a href="{{d.url}}">{{d}} </a>
+    </li>
+  {% endfor %}
+</ul>
+{% endif %}
+
+{% endblock %}

uwsgi.ini

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+[uwsgi]
+# User and group www-data on debian
+uid = 33
+gid = 33
+master = true
+# No. of processes can be increased
+processes = 7
+chown-socket =www-data:www-data
+virtualenv = /srv/simple_sample_flat_index/.env
+pythonpath = /srv/simple_sample_flat_index/
+#pidfile = /srv/simple_sample_flat_index/uwsgi.pid
+#socket = /srv/simple_sample_flat_index/uwsgi.sock
+pidfile=/var/run/simple_sample.pid
+socket = /var/run/simple_sample.sock
+chmod-socket = 666
+module = simple_sample
+callable= app
+wsgi-file = run.py
+logdate = true
+#logger = file:/srv/simple_sample_flat_index/uwsgi.log
+loglevel = debug
+gevent = 100
+vacuum=true
+plugins=python3,logfile