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How to use Requsts to send arguments in url, POST data, JSON data or file to Flask

This code will display different data from requests to show how flask get them.

from flask import Flask, request

app = Flask(__name__)

@app.route("/", methods=['GET', 'POST'])
def index():
    print('args:', request.args)
    print('form:', request.form)
    print('json:', request.json)
    print('data:', request.data)
    return ''

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

Send as args in url - params=

import requests

data = {'text': 'Hello', 'value': 100}

r = requests.get('http://localhost:5000/', params=data)
#r = requests.post('http://localhost:5000/', params=data)

Result:

args: ImmutableMultiDict([('text', 'Hello'), ('value', '100')])
form: ImmutableMultiDict([])
json: None
data: b''
files: ImmutableMultiDict([])

params= is used mostly with get() but it can be used also in post()

Send as form data - data=

import requests

data = {'text': 'Hello', 'value': 100}

#r = requests.get('http://localhost:5000/', data=data)
r = requests.post('http://localhost:5000/', data=data)

Result:

args: ImmutableMultiDict([])
form: ImmutableMultiDict([('text', 'Hello'), ('value', '100')])
json: None
data: b''
files: ImmutableMultiDict([])

data= is used mostly with post() but it can be used also in get()

Send as JSON data - json=

import requests

data = {'text': 'Hello', 'value': 100}

#r = requests.get('http://localhost:5000/', json=data)
r = requests.post('http://localhost:5000/', json=data)

Result:

args: ImmutableMultiDict([])
form: ImmutableMultiDict([])
json: {'text': 'Hello', 'value': 100}
data: b'{"text": "Hello", "value": 100}'
files: ImmutableMultiDict([])

json= is used mostly with post() but it can be used also in get()

Send as files data - files=

import requests

data = {'text': 'Hello', 'value': 100}

#r = requests.get('http://localhost:5000/', files=data)
r = requests.post('http://localhost:5000/', files=data)

Result:

args: ImmutableMultiDict([])
form: ImmutableMultiDict([])
json: None
data: b''
files: ImmutableMultiDict([('text', <FileStorage: 'text' (None)>), ('value', <FileStorage: 'value' (None)>)])

files= is used mostly with post() but it can be used also in get()

You can see data also if you display request's body

import requests

data = {'text': 'Hello', 'value': 100}

r = requests.post('https://httpbin.org/post', data=data)
print('form:', r.request.body)

r = requests.post('https://httpbin.org/post', json=data)
print('json:', r.request.body)

r = requests.post('https://httpbin.org/post', files=data)
print('file:', r.request.body)

Result:

form: text=Hello&value=100
json: b'{"text": "Hello", "value": 100}'
file: b'--2a0f189d55cfce27736cb0ce44d8621b\r\nContent-Disposition: form-data; name="text"; filename="text"\r\n\r\nHello\r\n--2a0f189d55cfce27736cb0ce44d8621b\r\nContent-Disposition: form-data; name="value"; filename="value"\r\n\r\n100\r\n--2a0f189d55cfce27736cb0ce44d8621b--\r\n'
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