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‎assignments/teachers/week01/answers/echo_client.py‎

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import socket
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import sys
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# Create a TCP/IP socket
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sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
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# Connect the socket to the port where the server is listening
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server_address = ('localhost', 10000)
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print >>sys.stderr, 'connecting to %s port %s' % server_address
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sock.connect(server_address)
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try:
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# Send data
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message = 'This is the message. It will be repeated.'
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print >>sys.stderr, 'sending "%s"' % message
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sock.sendall(message)
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# Look for the response
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amount_received = 0
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amount_expected = len(message)
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while amount_received < amount_expected:
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data = sock.recv(16)
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amount_received += len(data)
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print >>sys.stderr, 'received "%s"' % data
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finally:
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print >>sys.stderr, 'closing socket'
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sock.close()

‎assignments/teachers/week01/answers/echo_server.py‎

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import socket
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import sys
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# Create a TCP/IP socket
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sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
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# Bind the socket to the port
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server_address = ('localhost', 10000)
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print >>sys.stderr, 'starting up on %s port %s' % server_address
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sock.bind(server_address)
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# Listen for incoming connections
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sock.listen(1)
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try:
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while True:
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# Wait for a connection
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print >>sys.stderr, 'waiting for a connection'
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connection, client_address = sock.accept()
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try:
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print >>sys.stderr, 'connection from', client_address
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# Receive the data in small chunks and retransmit it
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while True:
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data = connection.recv(16)
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print >>sys.stderr, 'received "%s"' % data
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if data:
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print >>sys.stderr, 'sending data back to the client'
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connection.sendall(data)
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else:
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print >>sys.stderr, 'no more data from', client_address
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break
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finally:
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# Clean up the connection
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connection.close()
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except KeyboardInterrupt:
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sock.close()
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sys.exit(0)

‎assignments/week02/athome/assignment.txt‎

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Complete your HTTP Web Server. Accomplish as many of the following goals as
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you are able:
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* If you were unable to complete the first five steps in class, circle back
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and finish them
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* Complete the 'Bonus point' parts from the first five steps, if you haven't
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already done so
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* Format your directory listing as HTML
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* In the HTML directory listing, make the files clickable links
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* Add a new, dynamic endpoint. If the URI /time-page is requested, return an
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HTML page with the current time displayed.

‎assignments/week02/lab/echo_server.py‎

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#!/usr/bin/env python
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import socket
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host = '' # listen on all connections (WiFi, etc)
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port = 50000
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backlog = 5 # how many connections can we stack up
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size = 1024 # number of bytes to receive at once
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## create the socket
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s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
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# set an option to tell the OS to re-use the socket
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s.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1)
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# the bind makes it a server
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s.bind( (host,port) )
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s.listen(backlog)
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while True: # keep looking for new connections forever
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client, address = s.accept() # look for a connection
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data = client.recv(size)
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if data: # if the connection was closed there would be no data
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print "received: %s, sending it back"%data
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client.send(data)
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client.close()

‎assignments/week02/lab/tiny_html.html‎

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<html>
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<body>
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<h1>This is a header</h1>
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<p>
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and this is some regular text
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</p>
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<p>
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and some more
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</p>
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</body>
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</html>

‎assignments/week02/lab/web/a_web_page.html‎

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<!DOCTYPE html>
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<html>
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<body>
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<h1>My First Heading</h1>
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<p>My first paragraph.</p>
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</body>
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</html>
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‎assignments/week02/lab/web/images/JPEG_example.jpg‎

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‎assignments/week02/lab/web/images/Sample_Scene_Balls.jpg‎

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‎assignments/week02/lab/web/images/sample_1.png‎

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‎assignments/week02/lab/web/make_time.py‎

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#!/usr/bin/env python
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"""
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make_time.py
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simple script that returns and HTML page with the current time
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"""
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import datetime
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time_str = datetime.datetime.now().isoformat()
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html = """
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<http>
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<body>
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<h2> The time is: </h2>
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<p> %s <p>
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</body>
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</http>
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"""% time_str
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print html
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