[SOLVED] How to make a simple POST function with flask?

How to make a simple POST function with flask?

I made a local service to learn flask and trying to write some get/post functions. I have no problem with GET but POST just confused me a bit. What I want to do is when some user send his name as POST request service will return as "Hello name". I made some research but everything I saw was so complicated and full of json. I do not want to use json because I just send a string and return a string. Can you guys just help me with that and tell me how can I test that post request on curl? Thanks in advance!

Edit: I tried to write my data in json format as

data = { "name" : " "}

and tried to post like

@app.route("/f",methods=['POST'])
def f():
    request_data = request.get_json()
    myName = request_data['name']
    return (str(myName))

but did not work.

Solution

Step 1: Install Flask

pip3 install flask

Step 2: Create a file app.py with:

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

@app.route('/', methods = ['POST'])
def data():
    rq = request.form

    return 'Hello ' + rq.get('name', 'No name')

Step 3: Start Flask

export FLASK_APP=hello.py
flask run

Step 4: Call the app with cURL

curl -X POST http://127.0.0.1:5000/ -d "name=Bob"

Hello Bob

Json alternative:

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

@app.route('/', methods = ['POST'])
def data():
    rq = request.get_json()

    return 'Hello ' + rq.get('name', 'No name')

Then the cURL would be:

curl -X POST http://127.0.0.1:5000/ \
  -H "Content-Type: application/json" \
  -d '{"name": "Bob"}'

Hello Bob