Error in micro-python doing a POST using "urequests"

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Posts: 1
Joined: Tue Sep 11, 2018 11:05 am

Error in micro-python doing a POST using "urequests"

Post by jarain78 » Tue Sep 11, 2018 11:10 am

Hello everybody, I have a problem, I'm trying to send a wav file using the "urequests" library, but I can't do it. The micro-piton returns the following error:

TypeError: object with buffer protocol required

Any one knows how I can solve this?.

This is my code:

url = "http://server_addres/wav_file"
fin ='/sd/temp.wav', 'rb')

file_to_send= {'file': ubinascii.b2a_base64(fin)}
header={"content-type":"audio/wav", 'file': ubinascii.b2a_base64(fin)}

# data=file_to_send,

r =, headers=header)
print (r.text)



Posts: 380
Joined: Wed Apr 08, 2015 5:19 am

Re: Error in micro-python doing a POST using "urequests"

Post by SpotlightKid » Tue Sep 11, 2018 12:25 pm

Your code contains several errors:

* You're trying to encode the file-object fin via binascii.b2sa_base64. You probably meant to encode the filename.
* It's the line with the assignment to file_to_send which therefor fails.
* The same error is in the next line, but, anyways, the filename does not belong into the "Content-Type" header. I believe, if you want to pass a filename, you have to use a multipart body and set a "Content-Disposition" header on the part containing the file.
* You need to pass the the request body with the data argument.
* I don't see the need to use Base64 encoding at all.

Code: Select all

data = open("foo.wav", 'rb').read()
headers = {'Content-type': "audio/wav"}
r =, data=data, headers=headers)

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