python爬虫之获取验证码登陆

#--coding:utf-8#author:wuhao##这里我演示的就是本人所在学校的教育系统#import urllib.requestimport urllib.parseimport reimport shutilimport http.cookiejar

class LoginJust():    def __init__(self,url,url1,url2,header,account,pwd):        self.url=url        self.url1=url1        self.url2=url2        self.header=header        self.account=account        self.pwd=pwd        return

#创建opener，包含header信息和cookie    def CreateOpener(self):        #实例化cookie对象        cookie=http.cookiejar.CookieJar()        #创建一个cookie处理器        CookieHandle=urllib.request.HTTPCookieProcessor(cookie)        #创建带有cookie的opener        opener=urllib.request.build_opener(CookieHandle)        #传入header        head=[]        for key,value in self.header.items():            elem=(key,value)            head.append(elem)        opener.open(self.url)        return opener

#获取验证码图片，并保存到本地    def getImage(self,opener):        path = "imageCode_1.jpg"        # 带cookie和header        img = opener.open(self.url2)        with open(path, "wb") as f:            shutil.copyfileobj(img, f)        #print(os.stat(path).st_size, ‘characters copied‘)        return

#获取后台发送来的字符串    def getResponse(self,opener):        getReponse = opener.open(self.url1)        #        gRResult = getReponse.read().decode("utf-8")        return gRResult

#获取post所需的encoded参数    def achieveCode(self,response):        # scode、sxh是response中得来        scode = response.split("#")[0]        sxh = response.split("#")[1]        # userAccount、userPassword        userAccount = self.account        userPassword =self.pwd        code = userAccount + "%%%" + userPassword        # 最终需要获取的post的数据        encode = ""        # 进行账号密码加密，获取code的值        i = 0        while (i < len(code)):            if i < 20:                encode = encode + code[i:i + 1] + scode[0:int(sxh[i])]                # print(str(i)+"_encode:"+encode)                scode = scode[int(sxh[i]):len(scode)]                # print(str(i)+"_scode:"+scode)            else:                encode = encode + code[i:len(code)]                # print(str(i)+"_here_encode"+encode)                i = len(code)            i = i + 1        return encode

#判断登陆是否成功    def IsLoginS(self,encoded):#验证码的值        codeValue=input("请输入验证码：")        data={"useDogCode":"","encoded":encoded,"RANDOMCODE":codeValue}#把data转换为post的数据格式        postData=urllib.parse.urlencode(data)        result=opener.open(self.url,postData.encode("utf-8"))        Result=result.read().decode("utf-8")        regex=re.compile(r"1440407133")        #print(type(regex.search(Result)))        if regex.search(Result)!=None:            return True        else:            print("Someting Error happened:登陆失败")        return False

#再次请求验证码

# 需要post的网址的URLurl = "http://jwgl.just.edu.cn:8080/Logon.do?method=logon"# 获取后台数据的网址url1 = "http://jwgl.just.edu.cn:8080/Logon.do?method=logon&flag=sess"# 获取验证码图片的地址url2 = "http://jwgl.just.edu.cn:8080/verifycode.servlet"#headerheader=\    {        "User-Agent":"Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/56.0.2924.87 Safari/537.36",        "Referer":"http://jwgl.just.edu.cn:8080/Logon.do?method=logon",        "Host":"jwgl.just.edu.cn:8080",        "Connection":"keep-alive",        "Accept":"text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,*/*;q=0.8",        "Accept-Encoding":"gzip, deflate",        "Accept-Language":"zh-CN,zh;q=0.8",        "Upgrade-Insecure-Requests":"1",        "Cache-Control":"max-age=0",    }account=input("请输入用户名：")pwd=input("请输入密码：")#实例化对象lj=LoginJust(url,url1,url2,header,account,pwd)opener=lj.CreateOpener()lj.getImage(opener)encoded=lj.achieveCode(lj.getResponse(opener))if lj.IsLoginS(encoded):    print("登陆成功")

运行结果