Server-Side Scripting/Requests/Python (FastAPI)
routers/lesson3.py edit
# Converts a Fahrenheit temperature to Celsius using a GET request and
# converts a Celsius temperature to Fahrenheit using a POST request.
#
# References:
# https://www.mathsisfun.com/temperature-conversion.html
# https://fastapi.tiangolo.com/tutorial/query-params/
# https://fastapi.tiangolo.com/tutorial/request-forms/
from fastapi import APIRouter, Request
from fastapi.responses import HTMLResponse
from fastapi.templating import Jinja2Templates
router = APIRouter(prefix="/lesson3")
templates = Jinja2Templates(directory="templates")
@router.get("/", response_class=HTMLResponse)
async def get_lesson3(request: Request):
parameters = dict(request.query_params)
try:
fahrenheit = float(parameters["fahrenheit"])
celsius = (fahrenheit - 32) * 5 / 9
result = f"{fahrenheit:0.1f}° Fahrenheit is {celsius:0.1f}° Celsius"
except:
result = ""
return templates.TemplateResponse(
"lesson3.html",
{
"request": request,
"fahrenheit": result
}
)
@router.post("/", response_class=HTMLResponse)
async def post_lesson3(request: Request):
form = dict(await request.form())
try:
celsius = float(form["celsius"])
fahrenheit = celsius * 9 / 5 + 32
result = f"{celsius:0.1f}° Celsius is {fahrenheit:0.1f}° Fahrenheit"
except:
result = ""
return templates.TemplateResponse(
"lesson3.html",
{
"request": request,
"celsius": result
}
)
templates/lesson3.html edit
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Lesson 3</title>
<link rel="stylesheet" href="{{url_for('static', path='/styles.css')}}">
<style>
p {
min-height: 1em;
}
</style>
</head>
<body>
<form method="GET">
<p>
<label for="fahrenheit">Enter Fahrenheit temperature:</label>
<input type="text" id="fahrenheit" name="fahrenheit">
<input type="submit" value="Submit">
</p>
<p>
<output>{{fahrenheit}}</output>
</p>
</form>
<form method="POST">
<p>
<label for="celsius">Enter Celsius temperature:</label>
<input type="text" id="celsius" name="celsius">
<input type="submit" value="Submit">
</p>
<p>
<output>{{celsius}}</output>
</p>
</form>
</body>
</html>
Try It edit
See Server-Side Scripting/Routes and Templates/Python (FastAPI) to create a test environment.