Help with photos module and http post?

mikael

@inzel, ok, thanks. Can you share the relevant piece of the actual code where you are trying to upload the image?

inzel

The code is basically what I put in my original post. I have tried many many different things but havent been saving my code each time as I havent fully understood the modules. I guess I should just comment it all out in the future instead of deleting it. My main question is how I could take the image obtained from photos.capture_image() and then base64 encode it and send it in POST data.

If you have any thoughts on that I would love to hear about it :) Or if you have any thoughts on another way of accomplising the same task that would be great as well.

Thank you in advance!

-inzel

JonB

so, did you try the bytesio code, followed by b64encode? Post that completed attempt, then we can work from there. You might need to pass that through .decode('ascii') after that. you might need json= instead of data=.

I found a complete python api:

https://github.com/ffmmjj/kairos-face-sdk-python/blob/master/kairos_face/enroll.py

which uses those two other modifications I mentioned (they read the file directly, but the important thing is just getting the bytes out into b64encode)

inzel

@JonB

Thanks for the info. I have tried both of those but will again and post my results.

Thanks!

cvp

@inzel Perhaps reading here could help.
See pyimgur/init.py upload_image
This module allows to post an image to imgur, using base64...

inzel

@JonB

I am trying to use bytesio and base64 but cant get past the img.save line:

import photos
import requests
import io
import base64

#img = photos.capture_image()

with io.BytesIO() as output:
	img = photos.capture_image()
	img.save(output)
	contents = output.getvalue()
	image = base64.b64encode(contents)

url = "https://api.kairos.com/enroll```

Error is:

Traceback (most recent call last):
  File "/private/var/mobile/Containers/Shared/AppGroup/2D8E43AB-E263-4AE8-9F57-E62CCC11779D/Pythonista3/Documents/Kairos/kairos_upload.py", line 10, in <module>
    img.save(output)
  File "/var/containers/Bundle/Application/3C9A09E3-8A1E-49E7-956B-A8E46A817D5A/Pythonista3.app/Frameworks/Py2Kit.framework/pylib/site-packages/PIL/Image.py", line 1697, in save
    format = EXTENSION[ext]
KeyError

Appears that the save function requires me to have an extension. I then tried another angle and am getting a new error:

img = photos.capture_image()
contents = io.BytesIO(img)
binary_data = contents.getvalue()
image = base64.b64encode(binary_data)```

Error is:

Traceback (most recent call last):
File "/private/var/mobile/Containers/Shared/AppGroup/2D8E43AB-E263-4AE8-9F57-E62CCC11779D/Pythonista3/Documents/Kairos/kairos_upload.py", line 8, in <module>
contents = io.BytesIO(img)
TypeError: 'Image' does not have the buffer interface

inzel

@cvp Thanks! I will look in to that as well

cvp

@inzel if tu save a PIL image to a variable, you have to specify the format

img.save(output,'JPG')

inzel

@cvp

I tried that as well as:

img.save(output, format = ‘JPG’)

And I get errors each time:

img.save(output, ‘JPG’) :

Traceback (most recent call last):
File "/private/var/mobile/Containers/Shared/AppGroup/2D8E43AB-E263-4AE8-9F57-E62CCC11779D/Pythonista3/Documents/Kairos/kairos_upload.py", line 9, in <module>
img.save(output,'JPG')
File "/var/containers/Bundle/Application/3C9A09E3-8A1E-49E7-956B-A8E46A817D5A/Pythonista3.app/Frameworks/Py2Kit.framework/pylib/site-packages/PIL/Image.py", line 1704, in save
save_handler = SAVE[format.upper()]
KeyError: 'JPG'

img.save(output, format = ‘JPG’) :

Traceback (most recent call last):
File "/private/var/mobile/Containers/Shared/AppGroup/2D8E43AB-E263-4AE8-9F57-E62CCC11779D/Pythonista3/Documents/Kairos/kairos_upload.py", line 9, in <module>
img.save(output, format = 'JPG')
File "/var/containers/Bundle/Application/3C9A09E3-8A1E-49E7-956B-A8E46A817D5A/Pythonista3.app/Frameworks/Py2Kit.framework/pylib/site-packages/PIL/Image.py", line 1704, in save
save_handler = SAVE[format.upper()]
KeyError: 'JPG'

Maybe my syntax is wrong?

cvp

@inzel sorry img.save(output,'JPEG') is ok

inzel

@cvp

Ah perfect. That part works now.

with io.BytesIO() as output:
	img = photos.capture_image()
	img.save(output,'JPEG')
	contents = output.getvalue()
	image = base64.b64encode(contents)

I feel we are very close. I believe the final step now is determining the proper syntax to POST the payload. This would be much easier if I was able to use wireshark or another packet capture tool to see how the POST looks as its being sent but I cant do that on my iPad. This is what I am trying for my payload line but the syntax is incorrect:

payload = '{'"image": + image + "',"' + '\n' + '"subject_id": "test" + ","' + '\n' + '"gallery_name": "test"'}'

I need it to look like this when its sent:

{
“image”: image,
“subject_id”: “test”,
“gallery_name”:”test”
}

My apologies for all the new guy questions. I really appreciate all the help you guys have provided me so far. Im learning...

inzel

I got it to work!

import photos
import requests
import io
import base64
import json

with io.BytesIO() as output:
	img = photos.capture_image()
	img.save(output,'JPEG')
	contents = output.getvalue()
	image = base64.b64encode(contents)
	
url = "https://api.kairos.com/enroll"

values = {
	'image': image,
	'subject_id': 'test',
	'gallery_name': 'test'
}

headers = {
	'Content-Type': 'application/json',
	'app_id': '*********',
	'app_key': '*************************'
}

request = requests.post(url, data=json.dumps(values), headers=headers)
response = request.content

print(response)```

Thanks everyone!

cvp

@inzel 👍🍾

inzel

I decided to clean it up a bit and use some functions. I havent added my comments yet but here is a fully working solution:

import photos
import requests
import io
import base64
import json

img = photos.capture_image()

def getPhoto():
	with io.BytesIO() as output:
		img.save(output, 'JPEG')
		contents = output.getvalue()
		image = base64.b64encode(contents)	
	return image

def enrollPhoto():
	subject_id = raw_input("Hello, What is your name: ? ")
	print("Thank you " + subject_id + "." + " Analyzing...")
	image = getPhoto()
	url = "https://api.kairos.com/enroll"
	values = {
		'image': image,
		'subject_id': subject_id,
		'gallery_name': subject_id
	}
	headers = {
		'Content-Type': 'application/json',
		'app_id': '***********',
		'app_key': '****************************'
	}	
	r = requests.post(url, data=json.dumps(values), headers = headers)
	parsed_json = json.loads(r.content)
	attr = parsed_json['images'][0]['attributes']
	img.show()
	print(json.dumps(attr, indent=2))

enrollPhoto()

Just need to put in your actual app_id and app_key. Should work right away. My next step will be getting a simple interface built and then comparing the pic of the user to existing pics of the same user to determine whether or not they gain access. Something like that anyways. Turned out to be a fun endeavor!

JonB

fwiw, requests lets you use req.json() rather than json.loads(req.contents). also, you can use json=values instead of json.dumps(values) in the request.

Vincekok

@inzel this is great. I am learning to use Kairos as well and I will try this out!

Thanks!

inzel

I just came back to this project and I get an error!

r = requests.post(url, data=json.dumps(values), headers = headers)

Object of type 'bytes' is not JSON serializable

I havent made any changes so I cant imagine why this is suddenly happening.

Any thoughts?

inzel

@Vincekok Thank you!

JonB

Have you switched to py3 interpreter from py2, or vice versa?

inzel

Hey JonB!

Yes I have done that. Its really odd as this was working. Could it be because I went to the iPadOS beta?