--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/symbian-qemu-0.9.1-12/python-2.6.1/Demo/sockets/ftp.py	Fri Jul 31 15:01:17 2009 +0100
@@ -0,0 +1,146 @@
+# 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,
+    code = line[:3]
+    if line[3:4] == '-':
+        while 1:
+            line = f.readline()
+            if not line: break # Really an error
+            print line,
+            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)'
+
+# Get a command from the user.
+#
+def getcommand():
+    try:
+        while 1:
+            line = raw_input('ftp.py> ')
+            if line: return line
+    except EOFError:
+        return ''
+
+
+# Call the main program.
+#
+main()