├── .gitignore ├── LICENSE ├── README.rst ├── captchaMiddleware ├── __init__.py ├── middleware.py ├── solver.py └── tests │ ├── Captcha_eotjcochkq.jpg │ ├── testImage.py │ ├── testPage.html │ └── testParser.py ├── requirements.txt └── setup.py /.gitignore: -------------------------------------------------------------------------------- 1 | .eggs/ 2 | *.egg-info/ 3 | build/ 4 | dist/ 5 | *.pyc 6 | env/ 7 | .idea/ 8 | 9 | -------------------------------------------------------------------------------- /LICENSE: -------------------------------------------------------------------------------- 1 | GNU GENERAL PUBLIC LICENSE 2 | Version 3, 29 June 2007 3 | 4 | Copyright (C) 2007 Free Software Foundation, Inc. 5 | Everyone is permitted to copy and distribute verbatim copies 6 | of this license document, but changing it is not allowed. 7 | 8 | Preamble 9 | 10 | The GNU General Public License is a free, copyleft license for 11 | software and other kinds of works. 12 | 13 | The licenses for most software and other practical works are designed 14 | to take away your freedom to share and change the works. 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Interpretation of Sections 15 and 16. 613 | 614 | If the disclaimer of warranty and limitation of liability provided 615 | above cannot be given local legal effect according to their terms, 616 | reviewing courts shall apply local law that most closely approximates 617 | an absolute waiver of all civil liability in connection with the 618 | Program, unless a warranty or assumption of liability accompanies a 619 | copy of the Program in return for a fee. 620 | 621 | END OF TERMS AND CONDITIONS 622 | 623 | How to Apply These Terms to Your New Programs 624 | 625 | If you develop a new program, and you want it to be of the greatest 626 | possible use to the public, the best way to achieve this is to make it 627 | free software which everyone can redistribute and change under these terms. 628 | 629 | To do so, attach the following notices to the program. It is safest 630 | to attach them to the start of each source file to most effectively 631 | state the exclusion of warranty; and each file should have at least 632 | the "copyright" line and a pointer to where the full notice is found. 633 | 634 | {one line to give the program's name and a brief idea of what it does.} 635 | Copyright (C) {year} {name of author} 636 | 637 | This program is free software: you can redistribute it and/or modify 638 | it under the terms of the GNU General Public License as published by 639 | the Free Software Foundation, either version 3 of the License, or 640 | (at your option) any later version. 641 | 642 | This program is distributed in the hope that it will be useful, 643 | but WITHOUT ANY WARRANTY; without even the implied warranty of 644 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 645 | GNU General Public License for more details. 646 | 647 | You should have received a copy of the GNU General Public License 648 | along with this program. If not, see . 649 | 650 | Also add information on how to contact you by electronic and paper mail. 651 | 652 | If the program does terminal interaction, make it output a short 653 | notice like this when it starts in an interactive mode: 654 | 655 | {project} Copyright (C) {year} {fullname} 656 | This program comes with ABSOLUTELY NO WARRANTY; for details type `show w'. 657 | This is free software, and you are welcome to redistribute it 658 | under certain conditions; type `show c' for details. 659 | 660 | The hypothetical commands `show w' and `show c' should show the appropriate 661 | parts of the General Public License. Of course, your program's commands 662 | might be different; for a GUI interface, you would use an "about box". 663 | 664 | You should also get your employer (if you work as a programmer) or school, 665 | if any, to sign a "copyright disclaimer" for the program, if necessary. 666 | For more information on this, and how to apply and follow the GNU GPL, see 667 | . 668 | 669 | The GNU General Public License does not permit incorporating your program 670 | into proprietary programs. If your program is a subroutine library, you 671 | may consider it more useful to permit linking proprietary applications with 672 | the library. If this is what you want to do, use the GNU Lesser General 673 | Public License instead of this License. But first, please read 674 | . 675 | -------------------------------------------------------------------------------- /README.rst: -------------------------------------------------------------------------------- 1 | .. image:: https://media.giphy.com/media/S0hxMGYFhEMzm/giphy.gif 2 | :alt: I must be a robot then 3 | 4 | captchaMiddleware 5 | ===================== 6 | 7 | Checks for a CAPTCHA test and tries solving it. This is open-source so as to prevent slaves from 8 | being forced to solve CAPTCHA tests. 9 | 10 | Installation 11 | ------------ 12 | Note that this program relies on `Tesseract v4 13 | `_, which is available on Ubuntu 18.04. 14 | 15 | Install Tesseract and the language file 16 | 17 | :: 18 | 19 | sudo apt-get install tesseract-ocr 20 | sudo mkdir /usr/local/share/tessdata 21 | wget https://github.com/tesseract-ocr/tessdata/raw/4.00/eng.traineddata 22 | sudo mv eng.traineddata /usr/local/share/tessdata 23 | sudo chmod a+w /usr/local/share/tessdata/eng.traineddata 24 | export TESSDATA_PREFIX=/usr/local/share/tessdata 25 | which tesseract 26 | 27 | Make sure to include the `TESSDATA_PREFIX` in your bash profile. 28 | 29 | Install Pillow in Python to substitute for PIL 30 | 31 | :: 32 | 33 | pip install pillow 34 | 35 | Install captchaMiddleware 36 | 37 | :: 38 | 39 | python setup.py test 40 | python setup.py install 41 | 42 | If the tests fail, test your tesseract installation: 43 | 44 | :: 45 | 46 | tesseract "unknown letter 0.jpg" prediction --psm 10 --oem 0 47 | 48 | 49 | Configuration 50 | ------------- 51 | 52 | Include this in the Downloader Middleware 53 | 54 | :: 55 | 56 | DOWNLOADER_MIDDLEWARES = { 57 | … 58 | 'captchaMiddleware.middleware.CaptchaMiddleware':500 59 | } 60 | 61 | 62 | 63 | In your spider, set a meta key to prevent trying the tests too many times: 64 | :: 65 | 66 | from captchaMiddleware.middleware import RETRY_KEY 67 | … 68 | def start_requests(self): 69 | … 70 | for url in urls: 71 | yield scrapy.Request(url=url, callback=self.parse, 72 | errback=self.errorHandler, meta={RETRY_KEY:0}) 73 | -------------------------------------------------------------------------------- /captchaMiddleware/__init__.py: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/owen9825/captcha-middleware/7100370825e516dd6d06be9da2359e5b7dae3aab/captchaMiddleware/__init__.py -------------------------------------------------------------------------------- /captchaMiddleware/middleware.py: -------------------------------------------------------------------------------- 1 | # -*- coding: utf-8 -*- 2 | 3 | import logging 4 | import locale 5 | from scrapy.http import FormRequest 6 | from scrapy.exceptions import IgnoreRequest 7 | from captchaMiddleware.solver import solveCaptcha 8 | from bs4 import BeautifulSoup 9 | 10 | logger = logging.getLogger(__name__) 11 | 12 | KEYWORDS = {"en": ["characters", "type"]} 13 | RETRY_KEY = 'captcha_retries' 14 | 15 | 16 | class CaptchaMiddleware(object): 17 | """Checks a page for a CAPTCHA test and, if present, submits a solution for it""" 18 | MAX_CAPTCHA_ATTEMPTS = 3 19 | 20 | def containsCaptchaKeywords(self, text): 21 | # Check that the form mentions something about CAPTCHA 22 | language, encoding = locale.getlocale(category=locale.LC_MESSAGES) 23 | if language is None: 24 | language = KEYWORDS.keys()[0]; # Must be American 25 | if language[0:2] in KEYWORDS.keys(): 26 | for keyword in KEYWORDS[language[0:2]]: 27 | if keyword in text.lower(): 28 | return True 29 | return False 30 | else: 31 | logger.warning("CAPTCHA keywords have not been set for this locale.") 32 | return None 33 | 34 | def findCaptchaUrl(self, page): 35 | soup = BeautifulSoup(page, 'lxml') 36 | images = soup.find_all("img") 37 | forms = soup.find_all("form") 38 | if len(forms) != 1 or len(images) == 0: 39 | # Assert that a CAPTCHA page only has one form: the CAPTCHA form 40 | # Assert that the CAPTCHA image is tagged as 41 | return None 42 | if not self.containsCaptchaKeywords(forms[0].text): 43 | return None 44 | possibleImages = [] 45 | for image in images: 46 | if image in forms[0].descendants: 47 | possibleImages.append(image) 48 | if len(possibleImages) > 1: 49 | # todo: use NLP on the URLs or something. Amazon writes "Captcha" there 50 | logger.error("To do: resolve ambiguity when multiple images appear \ 51 | in the CAPTCHA form. Maybe this wasn't a CAPTCHA form.") 52 | return None 53 | elif len(possibleImages) == 0: 54 | logger.warning("Unable to find an image in the CAPTCHA form. Maybe \ 55 | this wasn't a CAPTCHA form.") 56 | return None 57 | # Now grab the URL from the only possible img 58 | imgUrl = possibleImages[0]["src"] 59 | return imgUrl 60 | 61 | def findCaptchaField(self, page): 62 | soup = BeautifulSoup(page, 'lxml') 63 | forms = soup.find_all("form") 64 | if len(forms) != 1: 65 | logger.debug("Unable to find a form on this page.") 66 | return None 67 | formFields = forms[0].find_all("input") 68 | possibleFields = list(filter(lambda field: field["type"] != "hidden", formFields)) 69 | if len(possibleFields) > 1: 70 | logger.error("Ambiguity when finding form field for CAPTCHA.") 71 | # Maybe we could use NLP to decide 72 | return None 73 | elif len(possibleFields) == 0: 74 | logger.error("Unable to find CAPTCHA form field.") 75 | return None 76 | else: 77 | return possibleFields[0]["name"] 78 | 79 | def process_response(self, request, response, spider): 80 | captchaUrl = self.findCaptchaUrl(response.text) 81 | if captchaUrl is None: 82 | return response; # No CAPTCHA is present 83 | elif request.meta.get(RETRY_KEY, self.MAX_CAPTCHA_ATTEMPTS) == self.MAX_CAPTCHA_ATTEMPTS: 84 | logger.warning("Too many CAPTCHA attempts; surrendering.") 85 | raise IgnoreRequest 86 | captchaSolution = solveCaptcha(imgUrl=captchaUrl, brazen=True) 87 | if captchaSolution is None: 88 | logger.error("CAPTCHA page detected, but no solution was proposed.") 89 | raise IgnoreRequest 90 | # Return a request to submit the captcha 91 | logger.info("Submitting solution %s for CAPTCHA at %s", captchaSolution, captchaUrl) 92 | formRequest = FormRequest.from_response( 93 | response, formnumber=0, formdata={self.findCaptchaField(response.text):captchaSolution}) 94 | formRequest.meta[RETRY_KEY] = request.meta.get('captcha_retries', 0) + 1 95 | return formRequest 96 | -------------------------------------------------------------------------------- /captchaMiddleware/solver.py: -------------------------------------------------------------------------------- 1 | # -*- coding: utf-8 -*- 2 | 3 | from PIL import Image, ImageFilter 4 | from pytesseract import image_to_string 5 | try: 6 | from urllib.request import urlopen 7 | except ImportError: 8 | from urllib2 import urlopen 9 | import numpy as np 10 | import scipy.misc 11 | from string import ascii_uppercase 12 | import random 13 | import logging 14 | import cv2 15 | import imutils 16 | 17 | VOCABULARY = list(filter(lambda letter: letter != "O", ascii_uppercase)) 18 | 19 | UNSHARP_FILTER = ImageFilter.UnsharpMask(radius=3, threshold=1) 20 | CAPTCHA_LENGTH = 6 21 | THRESHOLD = 255 - 30 22 | 23 | 24 | logger = logging.getLogger(__name__) 25 | 26 | 27 | def isPossible(captchaSolution): 28 | """Amazon always uses 6 uppercase Latin letters with no accents""" 29 | if len(captchaSolution) == CAPTCHA_LENGTH: 30 | for letter in captchaSolution: 31 | if letter not in VOCABULARY: 32 | return False 33 | return True 34 | return False 35 | 36 | 37 | def adjustSuggestion(input): 38 | input = input.upper() 39 | if len(input) > CAPTCHA_LENGTH: 40 | # All letters will be filtered for eligibility later. For now though, preserve as much as 41 | # possible 42 | input = filter(lambda letter: letter in VOCABULARY, input) 43 | while len(input) > CAPTCHA_LENGTH: 44 | cutLocation = random.randint(0, len(input)-1) 45 | input = input[0:cutLocation] + input[cutLocation+1:] 46 | while len(input) < CAPTCHA_LENGTH: 47 | # Throw in extra, random characters 48 | insLocation = random.randint(0, len(input)) 49 | input = input[0:insLocation] + random.choice(VOCABULARY) + input[insLocation:] 50 | result = "" 51 | # Filter letters for eligibility 52 | for letter in input: 53 | if letter in VOCABULARY: 54 | result += letter 55 | else: 56 | result += random.choice(VOCABULARY) 57 | return result 58 | 59 | 60 | def adjustAngle(angle): 61 | """Adjust an angle to something more reasonable""" 62 | if angle < 0: 63 | if abs(angle+90) < abs(angle): 64 | # rotated too far 65 | return angle + 90; 66 | else: 67 | return angle; 68 | else: 69 | if abs(angle-90) < angle: 70 | # rotated too far 71 | return angle - 90; 72 | else: 73 | return angle; 74 | 75 | 76 | def solveCaptcha(imgUrl, brazen=False): 77 | result = applyOcr(imgUrl); 78 | if isPossible(result): 79 | return result; 80 | elif brazen: 81 | # Guess something 82 | result = adjustSuggestion(result); 83 | logger.debug("CAPTCHA was adjusted to %s", result); 84 | return result; 85 | else: 86 | return None; 87 | 88 | 89 | def applyOcr(imgUrl): 90 | """ 91 | Open an image and read its letters. 92 | :param imgUrl: The URL for a CAPTCHA image. 93 | :return: The string in the imgae. 94 | """ 95 | response = urlopen("file://" + imgUrl) 96 | img = np.asarray(bytearray(response.read()), dtype="uint8") 97 | gray_img = cv2.imdecode(img, cv2.IMREAD_GRAYSCALE) 98 | # if it's black on white: 99 | gray_img = 255 - gray_img 100 | _, mask = cv2.threshold(gray_img, THRESHOLD, 255, cv2.THRESH_BINARY) 101 | mask, contours, hierarchy = cv2.findContours(mask, cv2.RETR_EXTERNAL, cv2.CHAIN_APPROX_SIMPLE) 102 | letters = {} # x coordinate ↦ predicted letter 103 | for c, contour in enumerate(contours): 104 | rect = cv2.minAreaRect(contour) # Find a rotated bounding box 105 | # rect is a tuple: ((corner 1, corner2), angle) 106 | angle = adjustAngle(rect[-1]) 107 | # Draw this contour 108 | letter_mask = np.zeros(mask.shape, dtype="uint8") 109 | letter_mask = cv2.drawContours(letter_mask, [contour], contourIdx=0, color=255, 110 | thickness=-1) 111 | segmented_img = cv2.bitwise_and(gray_img, gray_img, mask=letter_mask) # Applying mask 112 | dark_spun = imutils.rotate_bound(segmented_img, -angle) 113 | """ 114 | We could crop the letter, but Tesseract doesn't seem to like such tight margins. 115 | brightPixels = cv2.findNonZero(dark_spun) 116 | x, y, width, height = cv2.boundingRect(brightPixels) 117 | cropped = darkSpun[y:y+height, x:x+width] 118 | """ 119 | colored = cv2.cvtColor(dark_spun, cv2.COLOR_GRAY2RGB) 120 | colored = 255 - colored 121 | pil_image = Image.fromarray(colored) 122 | char_result = image_to_string(pil_image, config="--psm 10 --oem 0") 123 | if char_result is not None and len(char_result) > 0: 124 | moments = cv2.moments(contour) 125 | xCentre = int(moments["m10"]/moments["m00"]) 126 | while xCentre in letters: 127 | xCentre += 1 # Avoid key clash 128 | letters[xCentre] = char_result.upper() 129 | if logger.getEffectiveLevel() <= logging.DEBUG: 130 | scipy.misc.imsave(char_result + ".jpg", pil_image) 131 | else: 132 | logger.debug("No result for character %d", c) 133 | if logger.getEffectiveLevel() <= logging.DEBUG: 134 | scipy.misc.imsave("unknown letter {c}.jpg".format(c=c), pil_image) 135 | # Adjust letters based on X axis 136 | word_solution = "" 137 | for xCentre in sorted(letters.keys()): 138 | word_solution += letters[xCentre] 139 | logger.debug("OCR saw %s", word_solution) 140 | return word_solution 141 | -------------------------------------------------------------------------------- /captchaMiddleware/tests/Captcha_eotjcochkq.jpg: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/owen9825/captcha-middleware/7100370825e516dd6d06be9da2359e5b7dae3aab/captchaMiddleware/tests/Captcha_eotjcochkq.jpg -------------------------------------------------------------------------------- /captchaMiddleware/tests/testImage.py: -------------------------------------------------------------------------------- 1 | # -*- coding: utf-8 -*- 2 | 3 | from captchaMiddleware.solver import * 4 | from unittest import TestCase 5 | import os 6 | import logging 7 | 8 | TEST_PAGE = os.path.join(os.path.dirname(__file__), 'testPage.html') 9 | TEST_IMAGE = os.path.join(os.path.dirname(__file__), "Captcha_eotjcochkq.jpg") 10 | logger = logging.getLogger() 11 | logger.setLevel(logging.INFO) 12 | 13 | 14 | class ImageTest(TestCase): 15 | 16 | def test_Adjustment(self): 17 | suggestion = "ABCDE" 18 | adjusted = adjustSuggestion(suggestion) 19 | self.assertTrue(len(adjusted) > len(suggestion)) 20 | self.assertTrue(len(adjusted) == CAPTCHA_LENGTH) 21 | return 22 | 23 | def test_ImageSolving(self): 24 | logging.info("Opening test image from %s", TEST_IMAGE) 25 | solution = applyOcr(TEST_IMAGE) 26 | self.assertTrue(solution == "TAFPLH") 27 | return 28 | -------------------------------------------------------------------------------- /captchaMiddleware/tests/testPage.html: -------------------------------------------------------------------------------- 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | Robot Check 11 | 12 | 13 | 26 | 27 | 28 | 29 | 33 | 34 | 37 |
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121 | 128 | 129 | 130 | 131 | -------------------------------------------------------------------------------- /captchaMiddleware/tests/testParser.py: -------------------------------------------------------------------------------- 1 | # -*- coding: utf-8 -*- 2 | 3 | from captchaMiddleware.middleware import CaptchaMiddleware 4 | import locale 5 | from unittest import TestCase 6 | import os 7 | 8 | TEST_PAGE = os.path.join(os.path.dirname(__file__), 'testPage.html') 9 | TEST_URL = "https://images-na.ssl-images-amazon.com/captcha/fmvtfjch/Captcha_eotjcochkq.jpg" 10 | 11 | 12 | class ParsingTest(TestCase): 13 | 14 | def openTestPage(self): 15 | # Todo: spam Amazon until we get a CAPTCHA, then download that page 16 | testPage = open(TEST_PAGE) 17 | locale.setlocale(locale.LC_ALL, 'en_US.UTF-8') 18 | return testPage 19 | 20 | def testFormSearch(self): 21 | sampleMiddleware = CaptchaMiddleware() 22 | captchaField = sampleMiddleware.findCaptchaField(self.openTestPage()) 23 | self.assertTrue(captchaField == "field-keywords") 24 | return 25 | 26 | def testUrlSearch(self): 27 | sampleMiddleware = CaptchaMiddleware() 28 | captchaUrl = sampleMiddleware.findCaptchaUrl(self.openTestPage()) 29 | self.assertTrue(captchaUrl == TEST_URL) 30 | return -------------------------------------------------------------------------------- /requirements.txt: -------------------------------------------------------------------------------- 1 | appdirs>=1.4.3 2 | asn1crypto>=0.22.0 3 | attrs>=17.1.0 4 | Automat>=0.6.0 5 | beautifulsoup4>=4.6.0 6 | bs4>=0.0.1 7 | cffi>=1.10.0 8 | constantly>=15.1.0 9 | cryptography 10 | cssselect==1.0.1 11 | imutils>=0.4.3 12 | lxml 13 | numpy>=1.12.1 14 | olefile 15 | opencv-python==4.2.0.32 16 | packaging 17 | parsel 18 | Pillow>=4.1.1 19 | pyasn1 20 | pyasn1-modules 21 | pycparser 22 | PyDispatcher 23 | pyOpenSSL>=17.5.0 24 | pytesseract>=0.1.6 25 | queuelib 26 | scipy==1.1.0 27 | Scrapy>=1.4.0 28 | service-identity 29 | six 30 | Twisted 31 | w3lib 32 | zope.interface 33 | -------------------------------------------------------------------------------- /setup.py: -------------------------------------------------------------------------------- 1 | from setuptools import setup 2 | 3 | setup( 4 | name='captchaMiddleware', 5 | version='1.0.0', 6 | description='Check for a CAPTCHA test and try solving it', 7 | long_description=open('README.rst').read(), 8 | keywords='scrapy web-scraping captcha amazon ocr', 9 | license='New BSD License', 10 | author="Owen Miller", 11 | author_email='owen9825@gmail.com', 12 | url='kokociel.com', 13 | classifiers=[ 14 | 'Development Status :: 5 - Production/Stable', 15 | 'Framework :: Scrapy', 16 | 'Intended Audience :: Developers', 17 | 'License :: OSI Approved :: BSD License', 18 | 'Programming Language :: Python', 19 | 'Framework :: Scrapy', 20 | 'Topic :: Software Development :: Libraries :: Python Modules', 21 | 'Topic :: Scientific/Engineering :: Image Recognition', 22 | 'Topic :: Internet :: WWW/HTTP', 23 | ], 24 | packages=[ 25 | 'captchaMiddleware', 26 | ], 27 | install_requires=[ 28 | 'pytesseract', 29 | 'numpy', 30 | 'scipy', 31 | 'scrapy', 32 | 'bs4', 33 | 'opencv-python', 34 | 'imutils' 35 | ], 36 | test_suite='nose.collector', 37 | tests_require=['nose'] 38 | ) 39 | --------------------------------------------------------------------------------