6- Boost Your Flask App's Performance with Static Files

·

4 min read

As a developer, you always strive to optimize your Flask application's performance. One effective way to achieve this is by leveraging static files such as images, JavaScript, and CSS. In this article, we'll take a detailed look at how to create and utilize static files to enhance your Flask app's performance. By the end of this article, you'll have a better understanding of how to create new folders, Python, HTML, and CSS files, and load background images to create stunning web pages that load quickly.

Create new folders:

First, create a directory called "static" in your project directory using the command prompt:

mkdir C:\Users\gardi\flask-tutorial\static

Inside the "static" folder, create a "style" folder for styling the page and an "img" folder for images using the command prompt:

mkdir C:\Users\gardi\flask-tutorial\static\style
mkdir C:\Users\gardi\flask-tutorial\static\img

Create Python, HTML, and CSS files

Create a Python file to render the index template and save it as "static.py":

from flask import Flask, render_template
app = Flask(__name__)

@app.route("/")
def index():
   return render_template("index.html")

if name == '__main__':
   app.run(debug = True)

Then create index.html

<!doctype html>
<html lang="en">
<head>
    <meta charset="utf-8">
    <title>CS304: Flask</title>
    <link rel="stylesheet" type="text/css" 
          href="{{ url_for('static', filename='style.css') }}">
</head>
<body>

    <h1>Using Static File</h1>

    </body>
</html>

This sentence code defines the link of the style file:

    <link rel="stylesheet" type="text/css" 
          href="{{ url_for('static', filename='style.css') }}">

Create css style file:

Create a CSS file inside the "static/style" folder for styling your pages and save it as "style.css":

html { font-family: sans-serif; background: #eee; padding: 1rem; }
body { max-width: 960px; margin: 0 auto; background: white; }
h1 { font-family: serif; color: #377ba8; margin: 1rem 0; }
a { color: #377ba8; }
hr { border: none; border-top: 1px solid lightgray; }
nav { background: lightgray; display: flex; align-items: center; padding: 0 0.5rem; }
nav h1 { flex: auto; margin: 0; }
nav h1 a { text-decoration: none; padding: 0.25rem 0.5rem; }
nav ul  { display: flex; list-style: none; margin: 0; padding: 0; }
nav ul li a, nav ul li span, header .action { display: block; padding: 0.5rem; }
.content { padding: 0 1rem 1rem; }
.content > header { border-bottom: 1px solid lightgray; display: flex; align-items: flex-end; }
.content > header h1 { flex: auto; margin: 1rem 0 0.25rem 0; }
.flash { margin: 1em 0; padding: 1em; background: #cae6f6; border: 1px solid #377ba8; }
.post > header { display: flex; align-items: flex-end; font-size: 0.85em; }
.post > header > div:first-of-type { flex: auto; }
.post > header h1 { font-size: 1.5em; margin-bottom: 0; }
.post .about { color: slategray; font-style: italic; }
.post .body { white-space: pre-line; }
.content:last-child { margin-bottom: 0; }
.content form { margin: 1em 0; display: flex; flex-direction: column; }
.content label { font-weight: bold; margin-bottom: 0.5em; }
.content input, .content textarea { margin-bottom: 1em; }
.content textarea { min-height: 12em; resize: vertical; }
input.danger { color: #cc2f2e; }
input[type=submit] { align-self: start; min-width: 10em; }

Run the "static.py" script in the command prompt:

python static.py

Next, open your internet browser and navigate to:

localhost:5000

Your styled web page should now be displayed as follows:

Adding a background image

To add a background image, place an image in the "img" directory and name it "background.jpg". Then, insert the following code in the index template:

<img src= "{{ url_for("static", filename= "img/background.jpg") }}">

The updated index file should look like this:

<html lang="en">

<head>

    <meta charset="utf-8">

    <title>CS304: Flask</title>

    <link rel="stylesheet" type="text/css"

          href="{{ url_for('static', filename='style.css') }}">

</head>

<body>

<img src= "{{ url_for("static", filename= "img/background.jpg") }}">

    </body>

</html>

Finally, reload the web page to view the background image:

In conclusion, utilizing static files such as images, JavaScript, and CSS is an effective way to optimize the performance of Flask applications. By following the steps outlined in this article, developers can create and utilize static files to enhance their Flask app's performance and create stunning web pages that load quickly. Creating new folders, Python, HTML, and CSS files, and loading background images are all ways to improve the performance of Flask applications.

* If you like the content, please SUBSCRIBE to my channel for the future content

Did you find this article valuable?

Support Azad Rasul by becoming a sponsor. Any amount is appreciated!