What a freezing day is like if you build a sitemap and update time by time manually. Or paying for a recurring monthly subscription for just a second work one-off is not a smart decision as well.

If you are looking for a better way like the feeling of eating better marbling beef meat, this piece is here for you. This article is going to talk about developing dynamic sitemap xml for your Flask App. Let’s go!

Table of Contents: Flask App Dynamic Sitemap XML Tutorial

• Python Packages: urlparse, render_template, make_response
• Parse the Top Level Domain
• Static URL List
• Dynamic URL List
• Sitemap XML template
• Customize the response header
• Full Python Script of Dynamic Sitemap XML
• FAQ

Python Packages: urlparse, render_template, make_response

As usual, we need to skeletonize the fundamental functions. Here is the list of packages needed in developing tasted and incredible dynamic sitemap xml

• from urllib.parse import urlparse
• From flask import render_templte, make_response

In a moment, I would go through more details about what each package is for in this dish.

Parse the top domain of the App

First thing first, spotting the top level domain address is indispensable before ruling mapping the URLs. For better tasting the favor, here we need the urlparse. Below is a sample as follow:

 host_components = urlparse(request.host_url)

 host_base = host_components.scheme + "://" + host_components.netloc

Static URL List

Before generating each URL, we need to separate static and dynamic urls because some of the routes are set by variables.

We need to create a static URL list and rule what type of static URLs would be added to the list. Here are the code sample as follows:

 static_urls = list()

 for rule in app.url_map.iter_rules():

 if not str(rule).startswith("/inactive"):

 if "GET" in rule.methods and len(rule.arguments) == 0:

 url = {

 "loc": f"{host_base}{str(rule)}"

 }

 static_urls.append(url)

Cooking this dish needs the Flask in-built methods which are url_map, startswith

Dynamic URL List

For fetching the variable URL path, we could set up a set of data in Mongo in advance and call them in the function. Here is the code sample:

 dynamic_urls = list()

 dynamicURL variable = db.sample.find({})

Sitemap XML template

To capture the dynamic datafeed from the server side, we need to use Jinja2 in the front-end html template. Here is the code sample:

{% for url in static_urls %}

<url>

 <loc>{{ url["loc"] }}</loc>

</url>

{% endfor %}

{% for url in dynamic_urls %}

<url>

 <loc>{{ url["loc"] }}</loc>

</url>

{% endfor %}

Customize the response header

Last but not least, we need to customise the sitemap xml header that is different from other routes. For customising the header, we can use make_response

 response = make_response(xml_sitemap)

 response.headers["Content-Type"] = "application/xml"

Full Python Script of Dynamic Sitemap XML

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