This article mainly introduces the relevant information on identifying verification codes in python. This is a basic introductory tutorial for learning python. The introduction in the article is very detailed. A complete sample code is also given at the end of the article. Friends who need it can refer to it. , let’s take a look below.
Preface
Verification code? Can I crack it too?
I won’t say much about the introduction of verification codes. Various verification codes appear from time to time in people’s lives. As a student, the one you come into contact with most every day is the system of the Academic Affairs Office. Verification code, such as the following verification code:
Identification method
Simulated login has complicated steps. Here we ignore other operations and are only responsible for returning an answer string based on the input verification code picture.
We know that the verification code will make the picture colorful in order to create interference, and we first need to remove these interferences. This step requires continuous experimentation, enhancing the color of the picture, increasing the contrast, etc. can help.
After various operations on the pictures, I finally found a more perfect solution for removing interference. It can be seen that after removing the interference, under optimal circumstances, we will get a very pure black and white character picture. There are four characters in a picture. It is impossible to recognize all four characters at once. The picture needs to be cropped so that each small picture has only one character, and then each picture is recognized separately.
num_6=[ 0,0,0,0,0,0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0,0,0,0,0,0, 0,0,0,0,0,1,1,0,0,0,0,0,0, 0,0,0,0,1,1,1,0,0,0,0,0,0, 0,0,0,1,1,1,0,0,0,0,0,0,0, 0,0,0,1,1,0,0,0,0,0,0,0,0, 0,0,1,1,0,0,0,0,0,0,0,0,0, 0,0,1,1,0,0,0,0,0,0,0,0,0, 0,1,1,1,1,1,1,1,0,0,0,0,0, 0,1,1,1,1,1,1,1,1,0,0,0,0, 0,1,1,0,0,0,0,1,1,1,0,0,0, 0,1,1,0,0,0,0,0,1,1,0,0,0, 0,1,1,0,0,0,0,0,1,1,0,0,0, 0,1,1,1,0,0,0,1,1,1,0,0,0, 0,0,1,1,1,1,1,1,1,0,0,0,0, 0,0,0,1,1,1,1,1,0,0,0,0,0, 0,0,0,0,0,0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0,0,0,0,0,0, ]
Sample code
# -*- coding: utf-8 -*
import sys
reload(sys)
sys.setdefaultencoding( "utf-8" )
import re
import requests
import io
import os
import json
from PIL import Image
from PIL import ImageEnhance
from bs4 import BeautifulSoup
import mdata
class Student:
def init(self, user,password):
self.user = str(user)
self.password = str(password)
self.s = requests.Session()
def login(self):
url = "http://202.118.31.197/ACTIONLOGON.APPPROCESS?mode=4"
res = self.s.get(url).text
imageUrl = 'http://202.118.31.197/'+re.findall('<img src="(.+?)" width="55"',res)[0]
im = Image.open(io.BytesIO(self.s.get(imageUrl).content))
enhancer = ImageEnhance.Contrast(im)
im = enhancer.enhance(7)
x,y = im.size
for i in range(y):
for j in range(x):
if (im.getpixel((j,i))!=(0,0,0)):
im.putpixel((j,i),(255,255,255))
num = [6,19,32,45]
verifyCode = ""
for i in range(4):
a = im.crop((num[i],0,num[i]+13,20))
l=[]
x,y = a.size
for i in range(y):
for j in range(x):
if (a.getpixel((j,i))==(0,0,0)):
l.append(1)
else:
l.append(0)
his=0
chrr="";
for i in mdata.data:
r=0;
for j in range(260):
if(l[j]==mdata.data[i][j]):
r+=1
if(r>his):
his=r
chrr=i
verifyCode+=chrr
# print "辅助输入验证码完毕:",verifyCode
data= {
'WebUserNO':str(self.user),
'Password':str(self.password),
'Agnomen':verifyCode,
}
url = "http://202.118.31.197/ACTIONLOGON.APPPROCESS?mode=4"
t = self.s.post(url,data=data).text
if re.findall("images/Logout2",t)==[]:
l = '[0,"'+re.findall('alert((.+?));',t)[1][1][2:-2]+'"]'+" "+self.user+" "+self.password+"\n"
# print l
# return '[0,"'+re.findall('alert((.+?));',t)[1][1][2:-2]+'"]'
return [False,l]
else:
l = '登录成功 '+re.findall('! (.+?) ',t)[0]+" "+self.user+" "+self.password+"\n"
# print l
return [True,l]
def getInfo(self):
imageUrl = 'http://202.118.31.197/ACTIONDSPUSERPHOTO.APPPROCESS'
data = self.s.get('http://202.118.31.197/ACTIONQUERYBASESTUDENTINFO.APPPROCESS?mode＝3').text #学籍信息
data = BeautifulSoup(data,"lxml")
q = data.find_all("table",attrs={'align':"left"})
a = []
for i in q[0]:
if type(i)==type(q[0]) :
for j in i :
if type(j) ==type(i):
a.append(j.text)
for i in q[1]:
if type(i)==type(q[1]) :
for j in i :
if type(j) ==type(i):
a.append(j.text)
data = {}
for i in range(1,len(a),2):
data[a[i-1]]=a[i]
# data['照片'] = io.BytesIO(self.s.get(imageUrl).content)
return json.dumps(data)
def getPic(self):
imageUrl = 'http://202.118.31.197/ACTIONDSPUSERPHOTO.APPPROCESS'
pic = Image.open(io.BytesIO(self.s.get(imageUrl).content))
return pic
def getScore(self):
score = self.s.get('http://202.118.31.197/ACTIONQUERYSTUDENTSCORE.APPPROCESS').text #成绩单
score = BeautifulSoup(score, "lxml")
q = score.find_all(attrs={'height':"36"})[0]
point = q.text
print point[point.find('平均学分绩点'):]
table = score.html.body.table
people = table.find_all(attrs={'height' : '36'})[0].string
r = table.find_all('table',attrs={'align' : 'left'})[0].find_all('tr')
subject = []
lesson = []
for i in r[0]:
if type(r[0])==type(i):
subject.append(i.string)
for i in r:
k=0
temp = {}
for j in i:
if type(r[0])==type(j):
temp[subject[k]] = j.string
k+=1
lesson.append(temp)
lesson.pop()
lesson.pop(0)
return json.dumps(lesson)
def logoff(self):
return self.s.get('http://202.118.31.197/ACTIONLOGOUT.APPPROCESS').text
if name == "main":
a = Student(20150000,20150000)
r = a.login()
print r[1]
if r[0]:
r = json.loads(a.getScore())
for i in r:
for j in i:
print i[j],
print
q = json.loads(a.getInfo())
for i in q:
print i,q[i]
a.getPic().show()
a.logoff()Object-oriented video tutorial
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