How to make my post api to be able to send data as parameter in python

Question

I have this code:

from flask import (
    Flask,
    render_template
)

import SocketServer
import SimpleHTTPServer
import re

app = Flask(__name__, template_folder="templates")


@app.route('/index', methods=['GET'])
def index():
    return 'Welcome'


@app.route('/write_text_to_file', methods=['POST'])
def write_text_to_file():
    f = open("str.txt", "w+")
    f.write("hello world")
    f.close()


if __name__ == '__main__':

    app.run(debug=True)

EDIT: MY API includes one functionality which is writing a string to local file system by creating this file. What I want to achieve is to be able to pass a string as part of the api request which could be any string and to write the accepted string into a file, now I'm using hard-coded string which get the job done but I want to achieve the ability to send strings dynamically when using this api to write to file.

You can extract data from the URL as well as the request body by accessing the `request` object. See http://flask.pocoo.org/docs/1.0/quickstart/#the-request-object for details. — Sven Rusch, Dec 05 '18 at 09:30
can you explain your problem step by step? do you want to send data in post request to another route or what?? and where do you want to send the data? — Nihal, Dec 05 '18 at 10:00
from which route do you want to send data and where? please mention all that in your question. — Nihal, Dec 05 '18 at 10:04

Nihal · Accepted Answer · 2018-12-05T12:34:22.957

1

Try this:

In postman i posted the string in body as raw. then you can get data using request.data which will be of byte type so you have to use request.data.decode("utf-8")

@app.route('/write_text_to_file', methods=['POST'])
def write_text_to_file():
    if request.method == 'POST':
        print(type(request.data))
        data = request.data.decode("utf-8")
        f = open("str.txt", "w+")
        f.write(data)
        f.close()
    return ''

edited Dec 05 '18 at 12:34

answered Dec 05 '18 at 10:14

Nihal

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is this what you want ? @tupac shakur – Nihal Dec 05 '18 at 10:15
And if I want to use 'post' I mean building my api as 'post' and not 'get'? – tupac shakur Dec 05 '18 at 10:20
how are you using this route? and what are you sending with post request? – Nihal Dec 05 '18 at 10:28
I'm using it as follows: localhost:5000/write_text_to_file (now I did it using postman) and I would like to be able to send data in the body of the request api. – tupac shakur Dec 05 '18 at 10:42
check my answer now – Nihal Dec 05 '18 at 11:12
When I used postman and changing my code to your suggestion i was getting internal server error this is my request : localhost:5000/write_to_text_file and I added in raw section a simple string 'hello' when I sent it I was getting error code 500. – tupac shakur Dec 05 '18 at 12:31
because you have to return something. but more important thing is are you able to get data into your file – Nihal Dec 05 '18 at 12:34
OK now if I want to be able to test it and to pass a string value from the end user how can I do it? – tupac shakur Dec 05 '18 at 12:51
see i have updated my answer – Nihal Dec 05 '18 at 12:51
from HTML do you want to send? – Nihal Dec 05 '18 at 12:52
making a unittest in python which asks for an input from the user and send it as the body of the post request – tupac shakur Dec 05 '18 at 12:52
may be you should ask different question about that, i don't know the correct way – Nihal Dec 05 '18 at 13:05

How to make my post api to be able to send data as parameter in python

1 Answers1