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import base64 |
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import os |
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import pickle |
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import time |
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import uuid |
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from hashlib import sha256 |
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from multiprocessing import Process, Queue |
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import cv2 |
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import numpy |
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from skimage.metrics import structural_similarity |
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from .browser import BrowserRender, BrowserAgent |
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""" |
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Copyright (c) 2020 Star Inc.(https://starinc.xyz) |
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This Source Code Form is subject to the terms of the Mozilla Public |
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License, v. 2.0. If a copy of the MPL was not distributed with this |
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file, You can obtain one at http://mozilla.org/MPL/2.0/. |
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""" |
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class Image: |
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""" |
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Handle images for PageView |
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""" |
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def __init__(self, pbp_handle): |
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self.capture_handle = WebCapture(pbp_handle.cfg["WebCapture"]) |
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self.data_control = pbp_handle.data_control |
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async def capture(self, url: str): |
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""" |
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Capture Web Page by URL |
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:param url: URL to capture |
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:return: string hashed and NumPy Array |
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""" |
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cache_file = "{}.png".format( |
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uuid.uuid5(uuid.NAMESPACE_URL, url).hex |
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) |
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layout_path = self.capture_handle.get_page_image( |
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target_url=url, |
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output_image=cache_file |
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) |
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image_num_array = None |
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count, timeout = 0, 5 |
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while image_num_array is None: |
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assert count < timeout, "Timeout while reading image_num_array" |
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image_num_array = self.capture_handle.image_object(layout_path) |
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time.sleep(1) |
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count += 1 |
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hash_object = sha256(image_num_array) |
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self.capture_handle.delete_page_image(cache_file) |
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return hash_object.hexdigest(), image_num_array |
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async def signature(self, hex_digest: str): |
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""" |
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Match PageView signature from database |
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:param hex_digest: string hashed |
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:return: URL or NoneType |
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""" |
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return self.data_control.find_page_by_view_signature(hex_digest) |
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async def rank(self, target_num_array: str): |
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""" |
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To rank URL not registered if it same/similar to someone in trustlist. |
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:param target_num_array: NumPy Array |
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:return: URLs that similar to the target |
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""" |
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q = Queue() |
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thread = None |
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def _compare(sample: dict): |
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""" |
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Child function, rank sample of URL with samples in trustlist |
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:param sample: NumPy Array |
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:return: |
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""" |
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origin_sample = self.capture_handle.image_object_from_b64( |
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sample["target_view_narray"].encode("utf-8") |
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) |
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q.put([ |
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sample["url"], |
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self.capture_handle.image_compare( |
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target_num_array, |
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origin_sample |
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) |
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]) |
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trust_samples = self.data_control.get_view_narray_from_trustlist() |
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for record in trust_samples: |
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thread = Process( |
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target=_compare, |
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args=(record,) |
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) |
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thread.start() |
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if thread: |
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thread.join() |
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for _ in trust_samples: |
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yield q.get() |
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class WebCapture: |
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""" |
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To take screenshot for PBP. |
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""" |
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def __init__(self, config: dict): |
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self.capture_browser = config["capture_browser"] |
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self.cache_path = config["cache_path"] |
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self.browser = config["capture_type"] |
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if not os.path.exists(self.cache_path): |
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os.makedirs(self.cache_path) |
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@staticmethod |
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def __set_browser_simulation(type_id: str): |
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""" |
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Set Browser Simulation by ID |
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:param type_id: Type ID |
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:return: class object |
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""" |
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return { |
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'1': BrowserRender, |
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'2': BrowserAgent |
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}[type_id] |
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def get_page_image(self, target_url: str, output_image: str = 'out.png'): |
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""" |
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To get the image of the URL you provided |
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:param target_url: The target URL |
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:param output_image: Output path (optional) |
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:return: bool |
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""" |
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layout_path = os.path.join(self.cache_path, output_image) |
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simulation = self.__set_browser_simulation(self.browser)(self.capture_browser) |
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if os.path.isfile(layout_path): |
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os.remove(layout_path) |
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simulation.capture(target_url, layout_path) |
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simulation.close() |
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return layout_path |
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def delete_page_image(self, output_image: str = 'out.png'): |
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""" |
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To delete the image of the URL you provided |
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:param output_image: Output path (optional) |
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:return: bool |
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""" |
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layout_path = os.path.join(self.cache_path, output_image) |
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if os.path.isfile(layout_path): |
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os.remove(layout_path) |
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@staticmethod |
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def image_object(path: str): |
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""" |
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Create NumPy Array |
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:param path: The Image Path |
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:return: NumPy Array |
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""" |
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return cv2.imread(path, 0) |
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@staticmethod |
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def image_object_from_b64(b64_string: bytes): |
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""" |
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Import NumPy Array by base64 |
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:param b64_string: base64 NumPy Array dumped |
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:return: NumPy Array |
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""" |
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string = base64.b64decode(b64_string) |
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return pickle.loads(string) |
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@staticmethod |
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def image_compare(img1: numpy.numarray, img2: numpy.numarray): |
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""" |
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To compare image using structural similarity index |
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:param img1: Image object |
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:param img2: Image object |
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:return: float of the similar lever |
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""" |
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return structural_similarity(img1, img2, multichannel=True) |
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star-inc /
pbp-analytics
