Ex.05 Design a Website for Server Side Processing

Date:14/10/25

AIM:

To design a website to calculate the power of a lamp filament in an incandescent bulb in the server side.

FORMULA:

P = I²R
P --> Power (in watts)
 I --> Intensity
 R --> Resistance

DESIGN STEPS:

Step 1:

Clone the repository from GitHub.

Step 2:

Create Django Admin project.

Step 3:

Create a New App under the Django Admin project.

Step 4:

Create python programs for views and urls to perform server side processing.

Step 5:

Create a HTML file to implement form based input and output.

Step 6:

Publish the website in the given URL.

PROGRAM :

''' math.html

<title>Power Calculator</title> <style> body { background-color: red; font-family: Arial, sans-serif; text-align: center; }

.container { background-color: blue; border: 5px dashed green; width: 400px; padding: 30px; margin: 100px auto; color: white; border-radius: 10px; }

h1 { color: pink; }

input[type="text"] { width: 100px; padding: 5px; margin-left: 10px; }

input[type="submit"] { padding: 5px 15px; background-color: white; border: none; cursor: pointer; font-weight: bold; }

input[type="submit"]:hover { background-color: lightgray; }

</style>

Incandescent Bulb Power Calculator

<form method="post">
    {% csrf_token %}
    <label for="current">Current (I) in Amps:</label>
    <input type="text" id="current" name="current" required><br><br>

    <label for="resistance">Resistance (R) in Ohms:</label>
    <input type="text" id="resistance" name="resistance" required><br><br>

    <input type="submit" value="Calculate Power">
</form>

{% if result is not None %}
    <h2>Power (P) = {{ result }} Watts</h2>
{% endif %}

{% if error %}
    <p style="color: red;">{{ error }}</p>
{% endif %}

views.py from django.shortcuts import render

def calculate_power(request): result = None error = None

if request.method == 'POST':
    try:
        current = float(request.POST.get('current'))
        resistance = float(request.POST.get('resistance'))
        power = (current ** 2) * resistance
        result = round(power, 2)
    except (ValueError, TypeError):
        error = "Invalid input. Please enter valid numbers."

return render(request, 'mathapp/math.html', {'result': result, 'error': error})

urls.py from django.urls import path from . import views

urlpatterns = [ path('', views.calculate_power, name='calculate_power'), ] from django.contrib import admin from django.urls import path, include

urlpatterns = [ path('admin/', admin.site.urls), path('', include('mathapp.urls')), ] '''

SERVER SIDE PROCESSING:

HOMEPAGE:

RESULT:

The program for performing server side processing is completed successfully.