1 files changed, 0 insertions, 152 deletions
diff --git a/Demo/sockets/ftp.py b/Demo/sockets/ftp.py
deleted file mode 100644
index 5ea99c7..0000000
--- a/Demo/sockets/ftp.py
+++ /dev/null
@@ -1,152 +0,0 @@
-# A simple FTP client.
-#
-# The information to write this program was gathered from RFC 959,
-# but this is not a complete implementation!  Yet it shows how a simple
-# FTP client can be built, and you are welcome to extend it to suit
-# it to your needs...
-#
-# How it works (assuming you've read the RFC):
-#
-# User commands are passed uninterpreted to the server.  However, the
-# user never needs to send a PORT command.  Rather, the client opens a
-# port right away and sends the appropriate PORT command to the server.
-# When a response code 150 is received, this port is used to receive
-# the data (which is written to stdout in this version), and when the
-# data is exhausted, a new port is opened and a corresponding PORT
-# command sent.  In order to avoid errors when reusing ports quickly
-# (and because there is no s.getsockname() method in Python yet) we
-# cycle through a number of ports in the 50000 range.
-
-
-import sys, posix, string
-from socket import *
-
-
-BUFSIZE = 1024
-
-# Default port numbers used by the FTP protocol.
-#
-FTP_PORT = 21
-FTP_DATA_PORT = FTP_PORT - 1
-
-# Change the data port to something not needing root permissions.
-#
-FTP_DATA_PORT = FTP_DATA_PORT + 50000
-
-
-# Main program (called at the end of this file).
-#
-def main():
-    hostname = sys.argv[1]
-    control(hostname)
-
-
-# Control process (user interface and user protocol interpreter).
-#
-def control(hostname):
-    #
-    # Create control connection
-    #
-    s = socket(AF_INET, SOCK_STREAM)
-    s.connect((hostname, FTP_PORT))
-    f = s.makefile('r') # Reading the replies is easier from a file...
-    #
-    # Control loop
-    #
-    r = None
-    while 1:
-        code = getreply(f)
-        if code in ('221', 'EOF'): break
-        if code == '150':
-            getdata(r)
-            code = getreply(f)
-            r = None
-        if not r:
-            r = newdataport(s, f)
-        cmd = getcommand()
-        if not cmd: break
-        s.send(cmd + '\r\n')
-
-
-# Create a new data port and send a PORT command to the server for it.
-# (Cycle through a number of ports to avoid problems with reusing
-# a port within a short time.)
-#
-nextport = 0
-#
-def newdataport(s, f):
-    global nextport
-    port = nextport + FTP_DATA_PORT
-    nextport = (nextport+1) % 16
-    r = socket(AF_INET, SOCK_STREAM)
-    r.bind((gethostbyname(gethostname()), port))
-    r.listen(1)
-    sendportcmd(s, f, port)
-    return r
-
-
-# Send an appropriate port command.
-#
-def sendportcmd(s, f, port):
-    hostname = gethostname()
-    hostaddr = gethostbyname(hostname)
-    hbytes = string.splitfields(hostaddr, '.')
-    pbytes = [repr(port//256), repr(port%256)]
-    bytes = hbytes + pbytes
-    cmd = 'PORT ' + string.joinfields(bytes, ',')
-    s.send(cmd + '\r\n')
-    code = getreply(f)
-
-
-# Process an ftp reply and return the 3-digit reply code (as a string).
-# The reply should be a line of text starting with a 3-digit number.
-# If the 4th char is '-', it is a multi-line reply and is
-# terminate by a line starting with the same 3-digit number.
-# Any text while receiving the reply is echoed to the file.
-#
-def getreply(f):
-    line = f.readline()
-    if not line: return 'EOF'
-    print(line, end=' ')
-    code = line[:3]
-    if line[3:4] == '-':
-        while 1:
-            line = f.readline()
-            if not line: break # Really an error
-            print(line, end=' ')
-            if line[:3] == code and line[3:4] != '-': break
-    return code
-
-
-# Get the data from the data connection.
-#
-def getdata(r):
-    print('(accepting data connection)')
-    conn, host = r.accept()
-    print('(data connection accepted)')
-    while 1:
-        data = conn.recv(BUFSIZE)
-        if not data: break
-        sys.stdout.write(data)
-    print('(end of data connection)')
-
-def raw_input(prompt):
-    sys.stdout.write(prompt)
-    sys.stdout.flush()
-    return sys.stdin.readline()
-
-# Get a command from the user.
-#
-def getcommand():
-    try:
-        while 1:
-            line = input('ftp.py> ')
-            if line: return line
-    except EOFError:
-        return ''
-
-
-# Call the main program.
-#
-if __name__ == '__main__':
-    main()