How to Get POSTed JSON in Flask?

JSON is a data-interchange format like xml does. It is easy for humans to read and write, and it is also easy for machines to parse and generate. Flask framework provides a simple way to send JSON data.

Step 1: Create a folder containing the data you want to send.

For example, the following dictionary contains the name, age, and city of a person:

data = {
    "name": "John",
    "age": 30,
    "city": "New York"
}

Step 2: Use the jsonify() function provided by Flask to convert the data to JSON format and send it as a response.

The json.dumps function takes a dictionary as its argument and returns a response object with the JSON representation of the dictionary. For example, the following code sends the JSON data in the data dictionary as a response:

from flask import Flask, json

app = Flask(__name__)

@app.route('/json')
def send_json():
    data = {
        "name": "John",
        "age": 30,
        "city": "New York"
    }
    return json.dumps(data)

if __name__ == '__main__':
    app.run()

Step 3: Test the application.

You can test the application by opening a web browser and navigating to the following URL:

http://localhost:5000/json

If the application is working correctly, you should see the JSON data in the web browser.

Here is an example of the JSON data that you should see:

{
    "name": "John",
    "age": 30,
    "city": "New York"
}