update readme

Author: mattmakai

README.md

@@ -7,6 +7,7 @@ Posts and associated code:
 
 |Post|Code Directory|Notes|
 |---|---|---|
+|[How to Provision Ubuntu 16.04 Linux Servers on Linode](https://www.fullstackpython.com/blog/provision-ubuntu-linux-servers-linode.html)|No code for this post.||
 |[Creating Bar Chart Visuals with Bokeh, Bottle and Python 3](https://www.fullstackpython.com/blog/python-bottle-bokeh-bar-charts.html)|[bar-charts-bokeh-bottle-python-3](https://github.com/fullstackpython/blog-code-examples/tree/master/bar-charts-bokeh-bottle-python-3)||
 |[How to Add Hosted Monitoring to Flask Web Applications](https://www.fullstackpython.com/blog/hosted-monitoring-flask-web-apps.html)|[monitor-flask-apps](https://github.com/fullstackpython/blog-code-examples/tree/master/monitor-flask-apps)||
 |[Responsive Bar Charts with Bokeh, Flask and Python 3](https://www.fullstackpython.com/blog/responsive-bar-charts-bokeh-flask-python-3.html)|[bar-charts-bokeh-flask-python-3](https://github.com/fullstackpython/blog-code-examples/tree/master/bar-charts-bokeh-flask-python-3)||

monitor-python-bottle-apps/app.py

@@ -0,0 +1,38 @@
+import os
+import re
+import rollbar
+import rollbar.contrib.flask
+from flask import Flask, render_template, Response
+from flask import got_request_exception
+from werkzeug.exceptions import NotFound
+
+
+app = Flask(__name__)
+MIN_PAGE_NAME_LENGTH = 2
+
+
+@app.before_first_request
+def add_monitoring():
+    rollbar.init(os.environ.get('ROLLBAR_SECRET'))
+    ## delete the next line if you dont want this event anymore
+    rollbar.report_message('Rollbar is configured correctly')
+    got_request_exception.connect(rollbar.contrib.flask.report_exception, app)
+
+
+@app.route("/<string:page>/")
+def show_page(page):
+    try:
+        valid_length = len(page) >= MIN_PAGE_NAME_LENGTH
+        valid_name = re.match('^[a-z]+$', page.lower()) is not None
+        if valid_length and valid_name:
+            return render_template("{}.html".format(page))
+        else:
+            msg = "Sorry, couldn't find page with name {}".format(page)
+            raise NotFound(msg)
+    except:
+        rollbar.report_exc_info()
+        return Response("404 Not Found")
+
+
+if __name__ == "__main__":
+    app.run(debug=True)

monitor-python-bottle-apps/requirements.txt

@@ -0,0 +1,3 @@
+blinker==1.4
+Flask==0.12.2
+rollbar==0.13.12

monitor-python-bottle-apps/template.env

@@ -0,0 +1,2 @@
+# Rollbar token, found in project settings
+export ROLLBAR_SECRET=''