# import requests

#

# response = requests.get('http://127.0.0.1:8080/manager/html', auth=('tomcat', 'tomcat'))

# print(response.content.decode())

import base64

import re

import urllib.request

from urllib.error import HTTPError

class BasicAuth(object):

    def __init__(self, username, password, realm=''):

        auth_str = f"{username}:{password}"

        encode = base64.standard_b64encode(auth_str.encode()).decode()

        auth_str = f'Basic {encode}'

        self.auth = auth_str

        self.realm = realm

    def open(self, url):

        request = urllib.request.Request(url)

        try:

            response = urllib.request.urlopen(request)

            return response

        except HTTPError as e:

            auth_type = e.headers['www-authenticate']

            auth_str = re.compile(

                '(?P<schema>\w*)\s*realm=[\'"](?P<realm>[^\'"]*)[\'"]',

                re.IGNORECASE)

            match_ = auth_str.match(auth_type)

            if match_:

                match = match_.groupdict()

                schema = match.get('schema')

                if schema.lower() == 'basic':

                    request.add_header("Authorization", self.auth)

                    try:

                        response = urllib.request.urlopen(request)

                        print(response.read().decode())

                        return response

                    except HTTPError as e:

                        print(e.headers)

# base = BasicAuth('tomcat', 'tomcat')

# base.open('http://127.0.0.1:8080/manager/html')

basic_auth = urllib.request.HTTPPasswordMgrWithDefaultRealm()

basic_auth.add_password(None, 'http://127.0.0.1:8080/manager/html', 'tomcat', 'tomcat')

handler = urllib.request.HTTPBasicAuthHandler(basic_auth)

opener = urllib.request.build_opener(handler)

urllib.request.install_opener(opener)

response = urllib.request.urlopen('http://127.0.0.1:8080/manager/html')

print(response.read().decode())