Please provide steps to implement url shortener via Azure CLI.

Hi Sharma, Ritika,

Thanks for reaching out to Microsoft Q&A,

Follow below steps to implement url shortener via Azure CLI.

• Create a Python Azure function app and a table named "shortlinks" in Storage account linked to function app
• Create a Python Azure function and use below code to implement urlshortner.

import azure.functions as func

import logging

import hashlib

import os

import json

from azure.data.tables import TableServiceClient, UpdateMode

app = func.FunctionApp(http_auth_level=func.AuthLevel.ANONYMOUS)

    TABLE_NAME = "shortlinks"

    CONN_STR = "<Connectionstring of storage account linked to function app>"

    

@app.route(route="{shortcode}", methods=["GET", "POST"])

def url_shortener(req: func.HttpRequest) -> func.HttpResponse:

    logging.info("URL Shortener function received a request.")

    # Initialize Table storage client

    service = TableServiceClient.from_connection_string(conn_str=CONN_STR)

    table_client = service.create_table_if_not_exists(table_name=TABLE_NAME)

    # shorten a URL

    if req.method == "POST":

        try:

            req_body = req.get_json()

            long_url = req_body.get("url")

            if not long_url:

                return func.HttpResponse(

                    json.dumps({"error": "Missing 'url' field"}),

                    status_code=400,

                    mimetype="application/json"

                )

        except ValueError:

            return func.HttpResponse(

                json.dumps({"error": "Invalid JSON body"}),

                status_code=400,

                mimetype="application/json"

            )

        # Generating short code

        short_code = hashlib.md5(long_url.encode()).hexdigest()[:6]

        # Store mapping in Table Storage

        table_client.upsert_entity({

            "PartitionKey": "shortlinks",

            "RowKey": short_code,

            "long_url": long_url

        }, mode=UpdateMode.REPLACE)

        # Returning short URL

        host = req.headers.get("host", "localhost")

        short_url = f"https://{host}/{short_code}"

        return func.HttpResponse(

            json.dumps({"short_url": short_url}),

            status_code=200,

            mimetype="application/json"

        )

    # Redirect to long URL using short code

    elif req.method == "GET":

        shortcode = req.route_params.get("shortcode")

        try:

            entity = table_client.get_entity(partition_key="shortlinks", row_key=shortcode)

            return func.HttpResponse(

                status_code=302,

                headers={"Location": entity["long_url"]}

            )

        except:

            return func.HttpResponse(

                json.dumps({"error": "Short URL not found"}),

                status_code=404,

                mimetype="application/json"

            )

requirements.txt:

azure-functions

azure-data-tables

• Install the modules by running the command pip install -r requirements.txt.
• Run the function locally.
• Zip your function code and use below command to deploy the function using Azure CLI.

az functionapp deployment source config-zip \

   -g <resource_group> \

   -n <function_app_name> \

   --src <zip_file_path>

• Or you can deploy the function using function core tools command

func azure functionapp publish functionappname

• Open deployed function under functionapp=>overview, click Test/Run, replace {short code} with test and provide your url as Json input {"url":"https://www.microsoft.com"}

Run the function by selecting Post request.

• You will get an url with shortcode as output.

• Copy the shortcode and add it to your function url https://pravufn.azurewebsites.net/api/d696f9. You can run the short url directly in browser, it'll redirect to the url.

Hope it helps!

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If you have any other questions, let me know in the "comments" and I would be happy to help you.