How to send urlencoded parameters in POST request in python

Question

I’m trying to deploy my production ready code to Heroku to test it. Unfortunately, it is not taking JSON data so we converted into x-www-form-urlencoded.

params = urllib.parse.quote_plus(json.dumps({
    'grant_type': 'X',
    'username': 'Y',
    'password': 'Z'
}))
r = requests.post(URL, data=params)
print(params)

It is showing an error in this line as I guess data=params is not in proper format.

Is there any way to POST the urlencoded parameters to an API?

Asked By: Abhinav Anand

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Source

Answer 1

You don’t need to explicitly encode it, simply pass your dict to data argument and it will be encoded automatically.

>>> r = requests.post(URL, data = {'key':'value'})

From the official documentation:

Typically, you want to send some form-encoded data — much like an HTML
form. To do this, simply pass a dictionary to the data argument. Your
dictionary of data will automatically be form-encoded when the request
is made

Answered By: Abhinav Srivastava

Answer 2

Just to an important thing to note is that for nested json data you will need to convert the nested json object to string.

data = { 'key1': 'value',
         'key2': {
                'nested_key1': 'nested_value1',
                'nested_key2': 123
         }

       }

The dictionary needs to be transformed in this format

inner_dictionary = {
                'nested_key1': 'nested_value1',
                'nested_key2': 123
         }


data = { 'key1': 'value',
         'key2': json.dumps(inner_dictionary)

       }

r = requests.post(URL, data = data)

Answered By: Vallie

Answer 3

Set the Content-Type header to application/x-www-form-urlencoded.

headers = {'Content-Type': 'application/x-www-form-urlencoded'}
r = requests.post(URL, data=params, headers=headers)

Answered By: Rainbow Fossil

How to send urlencoded parameters in POST request in python

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