
from telnetlib import Telnet

def httpRequest(host,pfad="/",port=80):
    connection = Telnet(host,port)
    connection.write(bytes("GET {} HTTP/1.1\r\n".format(pfad),"utf-8"))
    connection.write(bytes("Host: {}\r\n".format(host),"utf-8"))
    connection.write(b"Connection: close\r\n")
    connection.write(b"\r\n")
    head, body = connection.read_all().split(b"\r\n\r\n",1)
    return head.decode("utf-8"), body.decode("utf-8")

head, body = httpRequest("www.pro-air.de")
print(head)
print("----"*10)
print(body[:2000])

HTTP/1.1 200 OK
Date: Wed, 19 Dec 2018 19:01:13 GMT
Server: Apache/1.3.39 (Unix) mod_gzip/1.3.26.1a PHP/4.4.8 FrontPage/5.0.2.2635 mod_ssl/2.8.30 OpenSSL/1.0.2a
Last-Modified: Tue, 10 Oct 2017 07:58:43 GMT
ETag: "e892c-4f-59dc7db3"
Accept-Ranges: bytes
Content-Length: 79
Connection: close
Content-Type: text/html
----------------------------------------
<meta http-equiv="refresh" content="0;url=http://pro-air.de/proair/index.html">


head, body = httpRequest("pro-air.de",pfad="/proair/index.html")
print(head)
print("----"*10)
print(body[:2000])

HTTP/1.1 200 OK
Date: Wed, 19 Dec 2018 19:01:14 GMT
Server: Apache/1.3.39 (Unix) mod_gzip/1.3.26.1a PHP/4.4.8 FrontPage/5.0.2.2635 mod_ssl/2.8.30 OpenSSL/1.0.2a
Last-Modified: Mon, 14 May 2018 09:25:55 GMT
ETag: "e7697a-f61c-5af95623"
Accept-Ranges: bytes
Content-Length: 63004
Connection: close
Content-Type: text/html
----------------------------------------
<!DOCTYPE html>
	<html lang="de" dir="ltr">
		<head>
        
        	<meta charset="UTF-8">
            
			<script>var themeHasJQuery = !!window.jQuery;</script>
			<script type="text/javascript" src="./assets/js/jquery.js"></script>
			<script>window._$ = jQuery.noConflict(themeHasJQuery);</script>

			<link rel="stylesheet" href="./assets/css/bootstrap.css" media="screen" />

			<script type="text/javascript" src="./assets/js/bootstrap.min.js"></script>
            <!--[if lte IE 9]>
            <link rel="stylesheet" href="./assets/css/layout.ie.css">
            <script src="./assets/js/layout.ie.js"></script>
            <![endif]-->

			<link class="" href='http://fonts.googleapis.com/css?family=Open+Sans:300,300italic,regular,italic,600,600italic,700,700italic,800,800italic&subset=latin' 
            rel='stylesheet' type='text/css'>
			<script type="text/javascript" src="./assets/js/layout.core.js"></script>

			<script src="./assets/js/CloudZoom.js"></script>

			<link rel="stylesheet" href="./assets/css/style.css">
            <link rel="stylesheet" type="text/css" href="assets/css/MyFontsWebfontsKit.css">

			<script src="./assets/js/script.js"></script>
            
            <link href="./assets/css/letitsnow.css" rel="stylesheet">
            <script src="./assets/js/modernizr.min.js"></script>

			

            <title>pro air Medienagentur GmbH</title>
            <meta name="title" content="pro air Medienagentur GmbH Augsburg"/>
            <meta name="description" content="Full-Service-Werbeagentur! Mit uns stehen Sie im Mittelpunkt! Wir arbeiten in der City von Augsburg. Da, wo das Leben pulsiert. "/> 
            <meta name="keywords" content="pro air Medienagentur GmbH, Mediaplanung, Eventservice, Messeservice, Imagefilm, Radiospot, TV-Spot, Kinospot, Aussenwerbung, Augsburg"/>
            <meta name="author" content="pro air Medienagentur GmbH | 020779"/>
            <meta name="robots" content="INDEX, FOLLOW"/>


from socket import gethostbyname
ip1 = gethostbyname("www.pro-air.de")
print(ip1)
ip2 = gethostbyname("pro-air.de")
print(ip2)

80.82.223.105
80.82.223.105


from socket import gethostbyaddr
rs1 = gethostbyaddr(ip1)
print(rs1)
rs2 = gethostbyaddr(ip2)
print(rs2)

('mailserver.uranus11.de', [], ['80.82.223.105'])
('mailserver.uranus11.de', [], ['80.82.223.105'])


count = body.lower().count("<img ")
count += body.lower().count("<link ")
count += body.lower().count("<script ")
print(count)

54


from html.parser import HTMLParser

class MyHTMLParser(HTMLParser):
    
    def __init__(self):
        super().__init__()
        self.count = 0

    def handle_starttag(self, tag, attrs):
        if tag in ["img","script"]:
            for attr in attrs:
                if attr[0].lower() == "src":
                    self.count += 1
        elif tag == "link":
            for attr in attrs:
                if attr[0].lower() == "href":
                    self.count += 1

parser = MyHTMLParser()
parser.feed(body)
print(parser.count)

52


from telnetlib import Telnet

connection = Telnet("smtp.hs-augsburg.de",25)

response = connection.read_until(b'\r\n')
print("\tS: {}".format(response.decode('utf-8')))
send = b"HELO meinRechner\r\n"
connection.write(send)
print("C: {}".format(send.decode('utf-8')))

response = connection.read_until(b'\r\n')
print("\tS: {}".format(response.decode('utf-8')))
send = b"MAIL FROM: <test@test.de>\r\n"
connection.write(send)
print("C: {}".format(send.decode('utf-8')))

response = connection.read_until(b'\r\n')
print("\tS: {}".format(response.decode('utf-8')))
send = b"RCPT TO: <nik.klever@hs-augsburg.de>\r\n"
connection.write(send)
print("C: {}".format(send.decode('utf-8')))

response = connection.read_until(b'\r\n')
print("\tS: {}".format(response.decode('utf-8')))
send = b"RCPT TO: <stefan.koenig@hs-augsburg.de>\r\n"
connection.write(send)
print("C: {}".format(send.decode('utf-8')))

response = connection.read_until(b'\r\n')
print("\tS: {}".format(response.decode('utf-8')))
send = b"RCPT TO: <nik@hs-augsburg.de>\r\n"
connection.write(send)
print("C: {}".format(send.decode('utf-8')))

response = connection.read_until(b'\r\n')
print("\tS: {}".format(response.decode('utf-8')))
send = b"DATA\r\n"
connection.write(send)
print("C: {}".format(send.decode('utf-8')))

response = connection.read_until(b'\r\n')
print("\tS: {}".format(response.decode('utf-8')))
send = b"""From: test@test.de
To: nik.klever@hs-augsburg.de
Cc: stefan.koenig@hs-augsburg.de, nik@hs-augsburg.de
Message-Id: <0456798A824341.B856AF0056@test.de>
Content-Type: text/plain
Subject: [ia3netzdata-onlinetest] MatrNr 12345678

Hallo,

dies ist eine Testmail

Nik"""
connection.write(send)
connection.write(b"\r\n.\r\n")
print("C: {}".format(send.decode('utf-8')))

response = connection.read_until(b'\r\n')
print("\tS: {}".format(response.decode('utf-8')))
send = b"QUIT\r\n"
connection.write(send)
print("C: {}".format(send.decode('utf-8')))

	S: 220 fly2.rz.hs-augsburg.de ESMTP Postfix

C: HELO meinRechner

	S: 250 fly2.rz.hs-augsburg.de

C: MAIL FROM: <test@test.de>

	S: 250 2.1.0 Ok

C: RCPT TO: <nik.klever@hs-augsburg.de>

	S: 250 2.1.5 Ok

C: RCPT TO: <stefan.koenig@hs-augsburg.de>

	S: 250 2.1.5 Ok

C: RCPT TO: <nik@hs-augsburg.de>

	S: 550 5.1.1 <nik@hs-augsburg.de>: Recipient address rejected: User unknown in virtual alias table

C: DATA

	S: 354 End data with <CR><LF>.<CR><LF>

C: From: test@test.de
To: nik.klever@hs-augsburg.de
Cc: stefan.koenig@hs-augsburg.de, nik@hs-augsburg.de
Message-Id: <0456798A824341.B856AF0056@test.de>
Content-Type: text/plain
Subject: [ia3netzdata-onlinetest] MatrNr 12345678

Hallo,

dies ist eine Testmail

Nik
	S: 250 2.0.0 Ok: queued as EBB4A120A66

C: QUIT


# Import smtplib for the actual sending function
import smtplib

# Import the email modules we'll need
from email.message import EmailMessage

text = """
Ich hoffe, die EMail kommt an 

Viele Grüße
"""

msg = EmailMessage()
msg.set_content(text)


me = "meineEMail@adresse.de"
you = "nik.klever@hs-augsburg.de"
cc = "stefan.koenig@hs-augsburg.de"

msg['Subject'] = "[ia3netzdata-onlinetest] MatrNr 12345678"
msg['From'] = me
msg['To'] = you
msg['Cc'] = cc

# Send the message via our own SMTP server.
s = smtplib.SMTP('smtp.hs-augsburg.de')
s.send_message(msg, me, [you, cc])
s.quit()

(221, b'2.0.0 Bye')


%%writefile flaskserver.py
from flask import Flask, request, render_template_string
app = Flask(__name__)

template = """<html>
    <head>
    <title>Index Seite</title>
  <style type="text/css">
.even { background-color:#ffffff; }
.odd { background-color:#e0e0e0; }
  </style>
    </head>
<body>
    <h2>Request Header</h2>
    <ul>
{% for hdr in headers %}
      <li class =  "{{loop.cycle('odd','even')}}"> {{ hdr }} </li>
{% endfor %}
    </ul>

    <h2>WSGI Umgebung</h2>
    <ul>
{% for item in environ %}
      <li class =  "{{loop.cycle('odd','even')}}"> {{ item }}: {{ environ[item] }} </li>
{% endfor %}
    </ul>

</body>
    </html>"""

@app.route("/")
def index():
    headers = request.headers
    environ = request.environ
    app.logger.info(headers)
    return render_template_string(template,headers=headers,environ=environ)

if __name__ == "__main__":
    app.run(host="0.0.0.0",port=8499)

Writing flaskserver.py


head, body = httpRequest("127.0.0.1",port=8499)
print(head)
print("----"*10)
print(body[:2000])

HTTP/1.0 200 OK
Content-Type: text/html; charset=utf-8
Content-Length: 1847
Server: Werkzeug/0.14.1 Python/3.6.6
Date: Wed, 19 Dec 2018 19:01:41 GMT
----------------------------------------
<html>
    <head>
    <title>Index Seite</title>
  <style type="text/css">
.even { background-color:#ffffff; }
.odd { background-color:#e0e0e0; }
  </style>
    </head>
<body>
    <h2>Request Header</h2>
    <ul>

      <li class =  "odd"> (&#39;Host&#39;, &#39;127.0.0.1&#39;) </li>

      <li class =  "even"> (&#39;Connection&#39;, &#39;close&#39;) </li>

    </ul>

    <h2>WSGI Umgebung</h2>
    <ul>

      <li class =  "odd"> wsgi.version: (1, 0) </li>

      <li class =  "even"> wsgi.url_scheme: http </li>

      <li class =  "odd"> wsgi.input: &lt;_io.BufferedReader name=5&gt; </li>

      <li class =  "even"> wsgi.errors: &lt;_io.TextIOWrapper name=&#39;&lt;stderr&gt;&#39; mode=&#39;w&#39; encoding=&#39;UTF-8&#39;&gt; </li>

      <li class =  "odd"> wsgi.multithread: True </li>

      <li class =  "even"> wsgi.multiprocess: False </li>

      <li class =  "odd"> wsgi.run_once: False </li>

      <li class =  "even"> werkzeug.server.shutdown: &lt;function WSGIRequestHandler.make_environ.&lt;locals&gt;.shutdown_server at 0x7effbb9af1e0&gt; </li>

      <li class =  "odd"> SERVER_SOFTWARE: Werkzeug/0.14.1 </li>

      <li class =  "even"> REQUEST_METHOD: GET </li>

      <li class =  "odd"> SCRIPT_NAME:  </li>

      <li class =  "even"> PATH_INFO: / </li>

      <li class =  "odd"> QUERY_STRING:  </li>

      <li class =  "even"> REMOTE_ADDR: 127.0.0.1 </li>

      <li class =  "odd"> REMOTE_PORT: 55292 </li>

      <li class =  "even"> SERVER_NAME: 0.0.0.0 </li>

      <li class =  "odd"> SERVER_PORT: 8499 </li>

      <li class =  "even"> SERVER_PROTOCOL: HTTP/1.1 </li>

      <li class =  "odd"> HTTP_HOST: 127.0.0.1 </li>

      <li class =  "even"> HTTP_CONNECTION: close </li>

      <li class =  "odd"> werkzeug.request: &lt;Request &#39;http://127.0.0.1/&#39; [GET]&gt; </li>

    </ul>

</body>
    </html>


from urllib.request import urlopen

req = urlopen("http://127.0.0.1:8499")
resp = req.read()
print(resp.decode("utf-8"))

<html>
    <head>
    <title>Index Seite</title>
  <style type="text/css">
.even { background-color:#ffffff; }
.odd { background-color:#e0e0e0; }
  </style>
    </head>
<body>
    <h2>Request Header</h2>
    <ul>

      <li class =  "odd"> (&#39;Accept-Encoding&#39;, &#39;identity&#39;) </li>

      <li class =  "even"> (&#39;Host&#39;, &#39;127.0.0.1:8499&#39;) </li>

      <li class =  "odd"> (&#39;User-Agent&#39;, &#39;Python-urllib/3.6&#39;) </li>

      <li class =  "even"> (&#39;Connection&#39;, &#39;close&#39;) </li>

    </ul>

    <h2>WSGI Umgebung</h2>
    <ul>

      <li class =  "odd"> wsgi.version: (1, 0) </li>

      <li class =  "even"> wsgi.url_scheme: http </li>

      <li class =  "odd"> wsgi.input: &lt;_io.BufferedReader name=5&gt; </li>

      <li class =  "even"> wsgi.errors: &lt;_io.TextIOWrapper name=&#39;&lt;stderr&gt;&#39; mode=&#39;w&#39; encoding=&#39;UTF-8&#39;&gt; </li>

      <li class =  "odd"> wsgi.multithread: True </li>

      <li class =  "even"> wsgi.multiprocess: False </li>

      <li class =  "odd"> wsgi.run_once: False </li>

      <li class =  "even"> werkzeug.server.shutdown: &lt;function WSGIRequestHandler.make_environ.&lt;locals&gt;.shutdown_server at 0x7effbb9be158&gt; </li>

      <li class =  "odd"> SERVER_SOFTWARE: Werkzeug/0.14.1 </li>

      <li class =  "even"> REQUEST_METHOD: GET </li>

      <li class =  "odd"> SCRIPT_NAME:  </li>

      <li class =  "even"> PATH_INFO: / </li>

      <li class =  "odd"> QUERY_STRING:  </li>

      <li class =  "even"> REMOTE_ADDR: 127.0.0.1 </li>

      <li class =  "odd"> REMOTE_PORT: 55294 </li>

      <li class =  "even"> SERVER_NAME: 0.0.0.0 </li>

      <li class =  "odd"> SERVER_PORT: 8499 </li>

      <li class =  "even"> SERVER_PROTOCOL: HTTP/1.1 </li>

      <li class =  "odd"> HTTP_ACCEPT_ENCODING: identity </li>

      <li class =  "even"> HTTP_HOST: 127.0.0.1:8499 </li>

      <li class =  "odd"> HTTP_USER_AGENT: Python-urllib/3.6 </li>

      <li class =  "even"> HTTP_CONNECTION: close </li>

      <li class =  "odd"> werkzeug.request: &lt;Request &#39;http://127.0.0.1:8499/&#39; [GET]&gt; </li>

    </ul>

</body>
    </html>


%%HTML

<html>
    <head>
    <title>Index Seite</title>
  <style type="text/css">
.even { background-color:#ffffff; }
.odd { background-color:#e0e0e0; }
  </style>
    </head>
<body>
    <h2>Request Header</h2>
    <ul>

      <li class =  "odd"> (&#39;Host&#39;, &#39;klever.hs-augsburg.de:8499&#39;) </li>

      <li class =  "even"> (&#39;Connection&#39;, &#39;keep-alive&#39;) </li>

      <li class =  "odd"> (&#39;Upgrade-Insecure-Requests&#39;, &#39;1&#39;) </li>

      <li class =  "even"> (&#39;User-Agent&#39;, &#39;Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/71.0.3578.98 Safari/537.36&#39;) </li>

      <li class =  "odd"> (&#39;Accept&#39;, &#39;text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,image/apng,*/*;q=0.8&#39;) </li>

      <li class =  "even"> (&#39;Accept-Encoding&#39;, &#39;gzip, deflate&#39;) </li>

      <li class =  "odd"> (&#39;Accept-Language&#39;, &#39;de-DE,de;q=0.9,en-US;q=0.8,en;q=0.7&#39;) </li>

      <li class =  "even"> (&#39;Cookie&#39;, &#39;_xsrf=2|39b777d8|5640bccf50685dea32d11ffefef4dc50|1539243857; _ga=GA1.2.2097609113.1541753547&#39;) </li>

    </ul>

    <h2>WSGI Umgebung</h2>
    <ul>

      <li class =  "odd"> wsgi.version: (1, 0) </li>

      <li class =  "even"> wsgi.url_scheme: http </li>

      <li class =  "odd"> wsgi.input: &lt;_io.BufferedReader name=5&gt; </li>

      <li class =  "even"> wsgi.errors: &lt;_io.TextIOWrapper name=&#39;&lt;stderr&gt;&#39; mode=&#39;w&#39; encoding=&#39;UTF-8&#39;&gt; </li>

      <li class =  "odd"> wsgi.multithread: True </li>

      <li class =  "even"> wsgi.multiprocess: False </li>

      <li class =  "odd"> wsgi.run_once: False </li>

      <li class =  "even"> werkzeug.server.shutdown: &lt;function WSGIRequestHandler.make_environ.&lt;locals&gt;.shutdown_server at 0x7effbb9be1e0&gt; </li>

      <li class =  "odd"> SERVER_SOFTWARE: Werkzeug/0.14.1 </li>

      <li class =  "even"> REQUEST_METHOD: GET </li>

      <li class =  "odd"> SCRIPT_NAME:  </li>

      <li class =  "even"> PATH_INFO: / </li>

      <li class =  "odd"> QUERY_STRING:  </li>

      <li class =  "even"> REMOTE_ADDR: 62.216.204.79 </li>

      <li class =  "odd"> REMOTE_PORT: 6776 </li>

      <li class =  "even"> SERVER_NAME: 0.0.0.0 </li>

      <li class =  "odd"> SERVER_PORT: 8499 </li>

      <li class =  "even"> SERVER_PROTOCOL: HTTP/1.1 </li>

      <li class =  "odd"> HTTP_HOST: klever.hs-augsburg.de:8499 </li>

      <li class =  "even"> HTTP_CONNECTION: keep-alive </li>

      <li class =  "odd"> HTTP_UPGRADE_INSECURE_REQUESTS: 1 </li>

      <li class =  "even"> HTTP_USER_AGENT: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/71.0.3578.98 Safari/537.36 </li>

      <li class =  "odd"> HTTP_ACCEPT: text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,image/apng,*/*;q=0.8 </li>

      <li class =  "even"> HTTP_ACCEPT_ENCODING: gzip, deflate </li>

      <li class =  "odd"> HTTP_ACCEPT_LANGUAGE: de-DE,de;q=0.9,en-US;q=0.8,en;q=0.7 </li>

      <li class =  "even"> HTTP_COOKIE: _xsrf=2|39b777d8|5640bccf50685dea32d11ffefef4dc50|1539243857; _ga=GA1.2.2097609113.1541753547 </li>

      <li class =  "odd"> werkzeug.request: &lt;Request &#39;http://klever.hs-augsburg.de:8499/&#39; [GET]&gt; </li>

    </ul>

</body>
    </html>

10. Jupyter Notebook¶

Musterlösung - Online Probe Prüfung¶

Hinweis zur Prüfung:¶

Viel Erfolg !¶

Aufgabe 1 - Herunterladen einer Webseite mittels HTTP und der Bibliothek telnetlib¶

Teilfrage 1¶

Teilfrage 2¶

Teilfrage 3¶

Teilfrage 4¶

Teilfrage 5¶

Teilfrage 6¶

Aufgabe 2 - E-Mail¶

Teilfrage 1 - E-Mail mit SMTP mittels der Bibliothek telnetlib verschicken¶

Teilfrage 2 - E-Mail mit SMTP mittels der Bibliothek smtplib verschicken¶

Aufgabe 3 - Erstellen eines Flask-Webservers¶

Hinweis zu Flask und Jupyter¶

Host- und Portnummer¶

Teilfrage 1¶

Teilfrage 2¶

Teilfrage 3¶

Teilfrage 4¶

Teilfrage 5¶