Create a URL shortener API using FastAPI and Python

 

Hi 🙂🖐

Today i will share with you how to Create a URL shortener API using FastAPI and Python.

I will use simple ways as much as I can.

I will use JSON as a database file; you can use anything else if you want; it's up to you. I prefer using JSON because it's very easy to use and setup.

Now lit's create a JOSN file

{
    "urls" : [

    ]
}

We didn't add the number of clicks because I wanted to make it simple and easy, and counting the number of clicks requires more advanced things, like adding admins, users, and API keys.

Now i will create the API 😎

from fastapi import FastAPI
from fastapi.responses import RedirectResponse
from secrets import token_urlsafe
from pydantic import BaseModel


import json
import validators

app = FastAPI()

database = json.load(open('database.json', 'r'))

class Url(BaseModel):
    url : str

@app.get('/')
def home():
    return {'msg': 'Welcome in My API :)'}


@app.post('/short_url')
def short_url(url : Url):
    if validators.url(url.url):
        url_id = token_urlsafe(5)
        shorted_url = f'http://127.0.0.1:8000/{url_id}'
        database['urls'].append({
            'url_id': url_id,
            'short_url': shorted_url,
            'target_url': url.url
        })


        json.dump(database, open('database.json', 'w'), indent = 4)


        return {'msg': 'done', 'url': shorted_url}

    return {'msg': 'Invalled url'}


@app.get('/{_id}')
def get_target_url(_id: str):
    for url in database['urls']:
        if url['url_id'] == _id:
            return RedirectResponse(url['target_url'])

    return {'msg': 'Url not found :('}

Test the API

import requests

data = {
    'url': 'https://dev.to/amr2018/create-quotes-api-using-fastapi-and-python-f12'
}

res = requests.post('http://127.0.0.1:8000/short_url', json=data)

print(res.json())

result

{'msg': 'done', 'url': 'http://127.0.0.1:8000/z4aKmMU'}

Open this url : http://127.0.0.1:8000/z4aKmMU

result

Now we're done 🤗

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Get the code from dev.to