Crypto Smart Camera: Uploading motion captures

note.py

import json
import re
import requests

class Note(object):
    def __init__(self,
        host=None,
        title='',
        body='',
        profile='',
        frame=BytesIO(),
        frames=BytesIO(),
        user_email=None,
        user_token=None):

        self.profile = profile
        self.host = host
        self.title = title
        self.body = body
        self.frame = frame
        self.frames = frames
        self.user_email = user_email
        self.user_token = user_token

    # http://picamera.readthedocs.io/en/release-1.12/recipes2.html#custom-outputs
    def write(self, stream):
        self.frames += stream

    def flush(self):
        self.create_note()

    def get_presigned_post(self):
        get_presigned_post_url = self.host +
            '/notes/new.json?user_email=' + self.user_email +
            '&user_token=' + self.user_token

        response = requests.get(get_presigned_post_url)
        presigned_post_json = json.loads(response.text)
        form_data = presigned_post_json['s3']['form-data']
        url = presigned_post_json['s3']['url']
        return url, form_data

    def form_object_files(self):
        file_data = self.frame.getvalue()

        if(len(frame) > 0):
            filename = 'test.jpg'
            mime_type = 'image/jpeg'
        else:
            file_data = self.frames.getvalue()
            filename = 'test.mp4'
            mime_type = 'video/mp4'

        { 'file': (filename, file_data, mime_type) }


    def post_file(self, url, form_data):
        response = requests.post(url, files=self.form_object_files(), data=form_data)
        url_re = 'http[s]?://(?:[a-zA-Z]|[0-9]|[$-_@.&+]|[!*\(\),]|(?:%[0-9a-fA-F][0-9a-fA-F]))+'
        return re.findall(url_re, response.text)[0].split('<')[0]

    def create_note(self, file_url=None, profile=''):
        print("[INFO] getting presigned request...")
        url, form_data = self.get_presigned_post()
        print("[INFO] uploading file...")
        file_url = self.post_file(url, form_data)
        form_data = {
            'note[title]': self.title,
            'note[body]': self.body + ' ' + profile,
            'note[file_url]': file_url,
            'user_email': self.user_email,
            'user_token': self.user_token
        }
        print("[INFO] creating note...")
        response = requests.post(self.host + '/notes', data=form_data)