【VSRC唯科普】简易图像识别与文字处理（第11/14篇）

#?encoding=utf8
import?time
from?urllib.request?import?urlretrieve
import?subprocess
from?selenium?import?webdriver

driver?=?webdriver.Chrome(executable_path='C:\chromedriver.exe')
driver.get(
????"https://www.amazon.com/War-Peace-Leo-Nikolayevich-Tolstoy/dp/1427030200"
)
time.sleep(2)

ele?=?driver.find_element_by_id('sitbLogoImg')
driver.execute_script("arguments[0].click();",?ele)
time.sleep(5)

imageList?=?set()
while?"pointer"?in?driver.find_element_by_id('sitbReaderRightPageTurner').get_attribute("style"):
????driver.find_element_by_id("sitbReaderRightPageTurner").click()
????time.sleep(2)
????pages?=?driver.find_elements_by_xpath("//div[@class='pageImage']/div/img")
????for?page?in?pages:
????????image?=?page.get_attribute("src")
????????imageList.add(image)
????????if?len(imageList)?>?3:??
????????????break
driver.quit()

for?image?in?sorted(imageList):
????urlretrieve(image,"page.jpg")
????p?=?subprocess.Popen(["D:\\Program?Files\\Tesseract-OCR\\tesseract.exe","page.jpg","page"],stdout=subprocess.PIPE,stderr=subprocess.PIPE)
????p.wait()
????f?=?open("page.txt","r")
????print?(f.read())

我们通过一个在线的带验证码的评论表单 http://www.pythonscraping.com/humans-only ，来演示如何使用机器人破解验证码。

实现代码如下：

#?encoding=utf8
from?urllib.request?import?urlretrieve
from?urllib.request?import?urlopen
from?bs4?import?BeautifulSoup
import?subprocess
import?requests
from?PIL?import?Image
from?PIL?import?ImageOps


def?cleanImage(imagePath):
????image?=?Image.open(imagePath)
????image?=?image.point(lambda?x:?0?if?x?<143?else?255)
????borderImage?=?ImageOps.expand(image,?border=20,?fill='white')
????borderImage.save(imagePath)


html?=?urlopen('http://www.pythonscraping.com/humans-only')
bsObj?=?BeautifulSoup(html,"html.parser")

imageLocation?=?bsObj.find("img",{'title':"Image?CAPTCHA"})["src"]
formBuildId?=?bsObj.find("input",{"name":"form_build_id"})["value"]
captchaSid?=?bsObj.find("input",{"name":"captcha_sid"})["value"]
captchaToken?=?bsObj.find("input",{"name":"captcha_token"})["value"]

captchaUrl?=?"http://pythonscraping.com"+imageLocation
urlretrieve(captchaUrl,"captcha.jpg")
cleanImage("captcha.jpg")
p?=?subprocess.Popen(["D:\\Program?Files\\Tesseract-OCR\\tesseract.exe","captcha.jpg","captcha"],stdout=subprocess.PIPE,stderr=subprocess.PIPE)
p.wait()
f?=?open("captcha.txt","r")

captchaResponse?=?f.read().replace("?","").replace("\n","")
print?("Captcha?solution?attempt:?"+captchaResponse)

if?len(captchaResponse)?==?5:
????params?=?{"captcha_token":captchaToken,"captcha_sid":captchaSid,
??????????????"form_id":"comment_node_page_form","form_build_id":formBuildId,
??????????????"captcha_response":captchaResponse,"name":"Ryan?Mitchell",
??????????????"subject":"I?come?to?seek?the?Grail",
??????????????"comment_body[und][0][value]":
??????????????"...and?I?am?definitely?not?a?bot"}
????r?=?requests.post?("http://www.pythonscraping.com/comment/reply/10",data=params)
????responseObj?=?BeautifulSoup(r.text)
????if?responseObj.find("div",{"class":"messages"})?is?not?None:
????????print(responseObj.find("div",{"class":"messages"}).get_text())
????else:
????????print?("There?was?a?problem?reading?the?CAPTCHA?correctly!")

1、https://www.w3school.com.cn/xpath/xpath_intro.asp