14 files changed, 650 insertions, 654 deletions

diff --git a/Demo/sockets/broadcast.py b/Demo/sockets/broadcast.py
index 010162c..6d2b1e8 100755
--- a/Demo/sockets/broadcast.py
+++ b/Demo/sockets/broadcast.py
@@ -10,8 +10,6 @@ s.bind(('', 0))
 s.setsockopt(SOL_SOCKET, SO_BROADCAST, 1)
 
 while 1:
-	data = repr(time.time()) + '\n'
-	s.sendto(data, ('<broadcast>', MYPORT))
-	time.sleep(2)
-
-	
+    data = repr(time.time()) + '\n'
+    s.sendto(data, ('<broadcast>', MYPORT))
+    time.sleep(2)
diff --git a/Demo/sockets/echosvr.py b/Demo/sockets/echosvr.py
index a37f9c2..f8a9623 100755
--- a/Demo/sockets/echosvr.py
+++ b/Demo/sockets/echosvr.py
@@ -13,19 +13,19 @@ ECHO_PORT = 50000 + 7
 BUFSIZE = 1024
 
 def main():
-	if len(sys.argv) > 1:
-		port = int(eval(sys.argv[1]))
-	else:
-		port = ECHO_PORT
-	s = socket(AF_INET, SOCK_STREAM)
-	s.bind(('', port))
-	s.listen(1)
-	conn, (remotehost, remoteport) = s.accept()
-	print 'connected by', remotehost, remoteport
-	while 1:
-		data = conn.recv(BUFSIZE)
-		if not data:
-			break
-		conn.send(data)
+    if len(sys.argv) > 1:
+        port = int(eval(sys.argv[1]))
+    else:
+        port = ECHO_PORT
+    s = socket(AF_INET, SOCK_STREAM)
+    s.bind(('', port))
+    s.listen(1)
+    conn, (remotehost, remoteport) = s.accept()
+    print 'connected by', remotehost, remoteport
+    while 1:
+        data = conn.recv(BUFSIZE)
+        if not data:
+            break
+        conn.send(data)
 
 main()
diff --git a/Demo/sockets/finger.py b/Demo/sockets/finger.py
index 0c2baed..e8b9ed2 100755
--- a/Demo/sockets/finger.py
+++ b/Demo/sockets/finger.py
@@ -22,35 +22,35 @@ FINGER_PORT = 79
 # Output goes directly to stdout (although this can be changed).
 #
 def finger(host, args):
-	s = socket(AF_INET, SOCK_STREAM)
-	s.connect((host, FINGER_PORT))
-	s.send(args + '\n')
-	while 1:
-		buf = s.recv(1024)
-		if not buf: break
-		sys.stdout.write(buf)
-	sys.stdout.flush()
+    s = socket(AF_INET, SOCK_STREAM)
+    s.connect((host, FINGER_PORT))
+    s.send(args + '\n')
+    while 1:
+        buf = s.recv(1024)
+        if not buf: break
+        sys.stdout.write(buf)
+    sys.stdout.flush()
 
 
 # Main function: argument parsing.
 #
 def main():
-	options = ''
-	i = 1
-	while i < len(sys.argv) and sys.argv[i][:1] == '-':
-		options = options + sys.argv[i] + ' '
-		i = i+1
-	args = sys.argv[i:]
-	if not args:
-		args = ['']
-	for arg in args:
-		if '@' in arg:
-			at = string.index(arg, '@')
-			host = arg[at+1:]
-			arg = arg[:at]
-		else:
-			host = ''
-		finger(host, options + arg)
+    options = ''
+    i = 1
+    while i < len(sys.argv) and sys.argv[i][:1] == '-':
+        options = options + sys.argv[i] + ' '
+        i = i+1
+    args = sys.argv[i:]
+    if not args:
+        args = ['']
+    for arg in args:
+        if '@' in arg:
+            at = string.index(arg, '@')
+            host = arg[at+1:]
+            arg = arg[:at]
+        else:
+            host = ''
+        finger(host, options + arg)
 
 
 # Call the main function.
diff --git a/Demo/sockets/ftp.py b/Demo/sockets/ftp.py
index 9e1d5a1..6e9282a 100755
--- a/Demo/sockets/ftp.py
+++ b/Demo/sockets/ftp.py
@@ -37,35 +37,35 @@ FTP_DATA_PORT = FTP_DATA_PORT + 50000
 # Main program (called at the end of this file).
 #
 def main():
-	hostname = sys.argv[1]
-	control(hostname)
+    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 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.
@@ -75,27 +75,27 @@ def control(hostname):
 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
+    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)
+    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).
@@ -105,40 +105,40 @@ def sendportcmd(s, f, port):
 # 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
+    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)'
+    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 ''
+    try:
+        while 1:
+            line = raw_input('ftp.py> ')
+            if line: return line
+    except EOFError:
+        return ''
 
 
 # Call the main program.
diff --git a/Demo/sockets/gopher.py b/Demo/sockets/gopher.py
index 4e1cb30..cd76659 100755
--- a/Demo/sockets/gopher.py
+++ b/Demo/sockets/gopher.py
@@ -30,8 +30,8 @@ T_SOUND     = 's'
 
 # Dictionary mapping types to strings
 typename = {'0': '<TEXT>', '1': '<DIR>', '2': '<CSO>', '3': '<ERROR>', \
-	'4': '<BINHEX>', '5': '<DOS>', '6': '<UUENCODE>', '7': '<SEARCH>', \
-	'8': '<TELNET>', '9': '<BINARY>', '+': '<REDUNDANT>', 's': '<SOUND>'}
+        '4': '<BINHEX>', '5': '<DOS>', '6': '<UUENCODE>', '7': '<SEARCH>', \
+        '8': '<TELNET>', '9': '<BINARY>', '+': '<REDUNDANT>', 's': '<SOUND>'}
 
 # Oft-used characters and strings
 CRLF = '\r\n'
@@ -39,309 +39,309 @@ TAB = '\t'
 
 # Open a TCP connection to a given host and port
 def open_socket(host, port):
-	if not port:
-		port = DEF_PORT
-	elif type(port) == type(''):
-		port = string.atoi(port)
-	s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
-	s.connect((host, port))
-	return s
+    if not port:
+        port = DEF_PORT
+    elif type(port) == type(''):
+        port = string.atoi(port)
+    s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
+    s.connect((host, port))
+    return s
 
 # Send a selector to a given host and port, return a file with the reply
 def send_request(selector, host, port):
-	s = open_socket(host, port)
-	s.send(selector + CRLF)
-	s.shutdown(1)
-	return s.makefile('r')
+    s = open_socket(host, port)
+    s.send(selector + CRLF)
+    s.shutdown(1)
+    return s.makefile('r')
 
 # Get a menu in the form of a list of entries
 def get_menu(selector, host, port):
-	f = send_request(selector, host, port)
-	list = []
-	while 1:
-		line = f.readline()
-		if not line:
-			print '(Unexpected EOF from server)'
-			break
-		if line[-2:] == CRLF:
-			line = line[:-2]
-		elif line[-1:] in CRLF:
-			line = line[:-1]
-		if line == '.':
-			break
-		if not line:
-			print '(Empty line from server)'
-			continue
-		typechar = line[0]
-		parts = string.splitfields(line[1:], TAB)
-		if len(parts) < 4:
-			print '(Bad line from server: %r)' % (line,)
-			continue
-		if len(parts) > 4:
-			print '(Extra info from server: %r)' % (parts[4:],)
-		parts.insert(0, typechar)
-		list.append(parts)
-	f.close()
-	return list
+    f = send_request(selector, host, port)
+    list = []
+    while 1:
+        line = f.readline()
+        if not line:
+            print '(Unexpected EOF from server)'
+            break
+        if line[-2:] == CRLF:
+            line = line[:-2]
+        elif line[-1:] in CRLF:
+            line = line[:-1]
+        if line == '.':
+            break
+        if not line:
+            print '(Empty line from server)'
+            continue
+        typechar = line[0]
+        parts = string.splitfields(line[1:], TAB)
+        if len(parts) < 4:
+            print '(Bad line from server: %r)' % (line,)
+            continue
+        if len(parts) > 4:
+            print '(Extra info from server: %r)' % (parts[4:],)
+        parts.insert(0, typechar)
+        list.append(parts)
+    f.close()
+    return list
 
 # Get a text file as a list of lines, with trailing CRLF stripped
 def get_textfile(selector, host, port):
-	list = []
-	get_alt_textfile(selector, host, port, list.append)
-	return list
+    list = []
+    get_alt_textfile(selector, host, port, list.append)
+    return list
 
 # Get a text file and pass each line to a function, with trailing CRLF stripped
 def get_alt_textfile(selector, host, port, func):
-	f = send_request(selector, host, port)
-	while 1:
-		line = f.readline()
-		if not line:
-			print '(Unexpected EOF from server)'
-			break
-		if line[-2:] == CRLF:
-			line = line[:-2]
-		elif line[-1:] in CRLF:
-			line = line[:-1]
-		if line == '.':
-			break
-		if line[:2] == '..':
-			line = line[1:]
-		func(line)
-	f.close()
+    f = send_request(selector, host, port)
+    while 1:
+        line = f.readline()
+        if not line:
+            print '(Unexpected EOF from server)'
+            break
+        if line[-2:] == CRLF:
+            line = line[:-2]
+        elif line[-1:] in CRLF:
+            line = line[:-1]
+        if line == '.':
+            break
+        if line[:2] == '..':
+            line = line[1:]
+        func(line)
+    f.close()
 
 # Get a binary file as one solid data block
 def get_binary(selector, host, port):
-	f = send_request(selector, host, port)
-	data = f.read()
-	f.close()
-	return data
+    f = send_request(selector, host, port)
+    data = f.read()
+    f.close()
+    return data
 
 # Get a binary file and pass each block to a function
 def get_alt_binary(selector, host, port, func, blocksize):
-	f = send_request(selector, host, port)
-	while 1:
-		data = f.read(blocksize)
-		if not data:
-			break
-		func(data)
+    f = send_request(selector, host, port)
+    while 1:
+        data = f.read(blocksize)
+        if not data:
+            break
+        func(data)
 
 # A *very* simple interactive browser
 
 # Browser main command, has default arguments
 def browser(*args):
-	selector = DEF_SELECTOR
-	host = DEF_HOST
-	port = DEF_PORT
-	n = len(args)
-	if n > 0 and args[0]:
-		selector = args[0]
-	if n > 1 and args[1]:
-		host = args[1]
-	if n > 2 and args[2]:
-		port = args[2]
-	if n > 3:
-		raise RuntimeError, 'too many args'
-	try:
-		browse_menu(selector, host, port)
-	except socket.error, msg:
-		print 'Socket error:', msg
-		sys.exit(1)
-	except KeyboardInterrupt:
-		print '\n[Goodbye]'
+    selector = DEF_SELECTOR
+    host = DEF_HOST
+    port = DEF_PORT
+    n = len(args)
+    if n > 0 and args[0]:
+        selector = args[0]
+    if n > 1 and args[1]:
+        host = args[1]
+    if n > 2 and args[2]:
+        port = args[2]
+    if n > 3:
+        raise RuntimeError, 'too many args'
+    try:
+        browse_menu(selector, host, port)
+    except socket.error, msg:
+        print 'Socket error:', msg
+        sys.exit(1)
+    except KeyboardInterrupt:
+        print '\n[Goodbye]'
 
 # Browse a menu
 def browse_menu(selector, host, port):
-	list = get_menu(selector, host, port)
-	while 1:
-		print '----- MENU -----'
-		print 'Selector:', repr(selector)
-		print 'Host:', host, ' Port:', port
-		print
-		for i in range(len(list)):
-			item = list[i]
-			typechar, description = item[0], item[1]
-			print string.rjust(repr(i+1), 3) + ':', description,
-			if typename.has_key(typechar):
-				print typename[typechar]
-			else:
-				print '<TYPE=' + repr(typechar) + '>'
-		print
-		while 1:
-			try:
-				str = raw_input('Choice [CR == up a level]: ')
-			except EOFError:
-				print
-				return
-			if not str:
-				return
-			try:
-				choice = string.atoi(str)
-			except string.atoi_error:
-				print 'Choice must be a number; try again:'
-				continue
-			if not 0 < choice <= len(list):
-				print 'Choice out of range; try again:'
-				continue
-			break
-		item = list[choice-1]
-		typechar = item[0]
-		[i_selector, i_host, i_port] = item[2:5]
-		if typebrowser.has_key(typechar):
-			browserfunc = typebrowser[typechar]
-			try:
-				browserfunc(i_selector, i_host, i_port)
-			except (IOError, socket.error):
-				print '***', sys.exc_type, ':', sys.exc_value
-		else:
-			print 'Unsupported object type'
+    list = get_menu(selector, host, port)
+    while 1:
+        print '----- MENU -----'
+        print 'Selector:', repr(selector)
+        print 'Host:', host, ' Port:', port
+        print
+        for i in range(len(list)):
+            item = list[i]
+            typechar, description = item[0], item[1]
+            print string.rjust(repr(i+1), 3) + ':', description,
+            if typename.has_key(typechar):
+                print typename[typechar]
+            else:
+                print '<TYPE=' + repr(typechar) + '>'
+        print
+        while 1:
+            try:
+                str = raw_input('Choice [CR == up a level]: ')
+            except EOFError:
+                print
+                return
+            if not str:
+                return
+            try:
+                choice = string.atoi(str)
+            except string.atoi_error:
+                print 'Choice must be a number; try again:'
+                continue
+            if not 0 < choice <= len(list):
+                print 'Choice out of range; try again:'
+                continue
+            break
+        item = list[choice-1]
+        typechar = item[0]
+        [i_selector, i_host, i_port] = item[2:5]
+        if typebrowser.has_key(typechar):
+            browserfunc = typebrowser[typechar]
+            try:
+                browserfunc(i_selector, i_host, i_port)
+            except (IOError, socket.error):
+                print '***', sys.exc_type, ':', sys.exc_value
+        else:
+            print 'Unsupported object type'
 
 # Browse a text file
 def browse_textfile(selector, host, port):
-	x = None
-	try:
-		p = os.popen('${PAGER-more}', 'w')
-		x = SaveLines(p)
-		get_alt_textfile(selector, host, port, x.writeln)
-	except IOError, msg:
-		print 'IOError:', msg
-	if x:
-		x.close()
-	f = open_savefile()
-	if not f:
-		return
-	x = SaveLines(f)
-	try:
-		get_alt_textfile(selector, host, port, x.writeln)
-		print 'Done.'
-	except IOError, msg:
-		print 'IOError:', msg
-	x.close()
+    x = None
+    try:
+        p = os.popen('${PAGER-more}', 'w')
+        x = SaveLines(p)
+        get_alt_textfile(selector, host, port, x.writeln)
+    except IOError, msg:
+        print 'IOError:', msg
+    if x:
+        x.close()
+    f = open_savefile()
+    if not f:
+        return
+    x = SaveLines(f)
+    try:
+        get_alt_textfile(selector, host, port, x.writeln)
+        print 'Done.'
+    except IOError, msg:
+        print 'IOError:', msg
+    x.close()
 
 # Browse a search index
 def browse_search(selector, host, port):
-	while 1:
-		print '----- SEARCH -----'
-		print 'Selector:', repr(selector)
-		print 'Host:', host, ' Port:', port
-		print
-		try:
-			query = raw_input('Query [CR == up a level]: ')
-		except EOFError:
-			print
-			break
-		query = string.strip(query)
-		if not query:
-			break
-		if '\t' in query:
-			print 'Sorry, queries cannot contain tabs'
-			continue
-		browse_menu(selector + TAB + query, host, port)
+    while 1:
+        print '----- SEARCH -----'
+        print 'Selector:', repr(selector)
+        print 'Host:', host, ' Port:', port
+        print
+        try:
+            query = raw_input('Query [CR == up a level]: ')
+        except EOFError:
+            print
+            break
+        query = string.strip(query)
+        if not query:
+            break
+        if '\t' in query:
+            print 'Sorry, queries cannot contain tabs'
+            continue
+        browse_menu(selector + TAB + query, host, port)
 
 # "Browse" telnet-based information, i.e. open a telnet session
 def browse_telnet(selector, host, port):
-	if selector:
-		print 'Log in as', repr(selector)
-	if type(port) <> type(''):
-		port = repr(port)
-	sts = os.system('set -x; exec telnet ' + host + ' ' + port)
-	if sts:
-		print 'Exit status:', sts
+    if selector:
+        print 'Log in as', repr(selector)
+    if type(port) <> type(''):
+        port = repr(port)
+    sts = os.system('set -x; exec telnet ' + host + ' ' + port)
+    if sts:
+        print 'Exit status:', sts
 
 # "Browse" a binary file, i.e. save it to a file
 def browse_binary(selector, host, port):
-	f = open_savefile()
-	if not f:
-		return
-	x = SaveWithProgress(f)
-	get_alt_binary(selector, host, port, x.write, 8*1024)
-	x.close()
+    f = open_savefile()
+    if not f:
+        return
+    x = SaveWithProgress(f)
+    get_alt_binary(selector, host, port, x.write, 8*1024)
+    x.close()
 
 # "Browse" a sound file, i.e. play it or save it
 def browse_sound(selector, host, port):
-	browse_binary(selector, host, port)
+    browse_binary(selector, host, port)
 
 # Dictionary mapping types to browser functions
 typebrowser = {'0': browse_textfile, '1': browse_menu, \
-	'4': browse_binary, '5': browse_binary, '6': browse_textfile, \
-	'7': browse_search, \
-	'8': browse_telnet, '9': browse_binary, 's': browse_sound}
+        '4': browse_binary, '5': browse_binary, '6': browse_textfile, \
+        '7': browse_search, \
+        '8': browse_telnet, '9': browse_binary, 's': browse_sound}
 
 # Class used to save lines, appending a newline to each line
 class SaveLines:
-	def __init__(self, f):
-		self.f = f
-	def writeln(self, line):
-		self.f.write(line + '\n')
-	def close(self):
-		sts = self.f.close()
-		if sts:
-			print 'Exit status:', sts
+    def __init__(self, f):
+        self.f = f
+    def writeln(self, line):
+        self.f.write(line + '\n')
+    def close(self):
+        sts = self.f.close()
+        if sts:
+            print 'Exit status:', sts
 
 # Class used to save data while showing progress
 class SaveWithProgress:
-	def __init__(self, f):
-		self.f = f
-	def write(self, data):
-		sys.stdout.write('#')
-		sys.stdout.flush()
-		self.f.write(data)
-	def close(self):
-		print
-		sts = self.f.close()
-		if sts:
-			print 'Exit status:', sts
+    def __init__(self, f):
+        self.f = f
+    def write(self, data):
+        sys.stdout.write('#')
+        sys.stdout.flush()
+        self.f.write(data)
+    def close(self):
+        print
+        sts = self.f.close()
+        if sts:
+            print 'Exit status:', sts
 
 # Ask for and open a save file, or return None if not to save
 def open_savefile():
-	try:
-		savefile = raw_input( \
-	    'Save as file [CR == don\'t save; |pipeline or ~user/... OK]: ')
-	except EOFError:
-		print
-		return None
-	savefile = string.strip(savefile)
-	if not savefile:
-		return None
-	if savefile[0] == '|':
-		cmd = string.strip(savefile[1:])
-		try:
-			p = os.popen(cmd, 'w')
-		except IOError, msg:
-			print repr(cmd), ':', msg
-			return None
-		print 'Piping through', repr(cmd), '...'
-		return p
-	if savefile[0] == '~':
-		savefile = os.path.expanduser(savefile)
-	try:
-		f = open(savefile, 'w')
-	except IOError, msg:
-		print repr(savefile), ':', msg
-		return None
-	print 'Saving to', repr(savefile), '...'
-	return f
+    try:
+        savefile = raw_input( \
+    'Save as file [CR == don\'t save; |pipeline or ~user/... OK]: ')
+    except EOFError:
+        print
+        return None
+    savefile = string.strip(savefile)
+    if not savefile:
+        return None
+    if savefile[0] == '|':
+        cmd = string.strip(savefile[1:])
+        try:
+            p = os.popen(cmd, 'w')
+        except IOError, msg:
+            print repr(cmd), ':', msg
+            return None
+        print 'Piping through', repr(cmd), '...'
+        return p
+    if savefile[0] == '~':
+        savefile = os.path.expanduser(savefile)
+    try:
+        f = open(savefile, 'w')
+    except IOError, msg:
+        print repr(savefile), ':', msg
+        return None
+    print 'Saving to', repr(savefile), '...'
+    return f
 
 # Test program
 def test():
-	if sys.argv[4:]:
-		print 'usage: gopher [ [selector] host [port] ]'
-		sys.exit(2)
-	elif sys.argv[3:]:
-		browser(sys.argv[1], sys.argv[2], sys.argv[3])
-	elif sys.argv[2:]:
-		try:
-			port = string.atoi(sys.argv[2])
-			selector = ''
-			host = sys.argv[1]
-		except string.atoi_error:
-			selector = sys.argv[1]
-			host = sys.argv[2]
-			port = ''
-		browser(selector, host, port)
-	elif sys.argv[1:]:
-		browser('', sys.argv[1])
-	else:
-		browser()
+    if sys.argv[4:]:
+        print 'usage: gopher [ [selector] host [port] ]'
+        sys.exit(2)
+    elif sys.argv[3:]:
+        browser(sys.argv[1], sys.argv[2], sys.argv[3])
+    elif sys.argv[2:]:
+        try:
+            port = string.atoi(sys.argv[2])
+            selector = ''
+            host = sys.argv[1]
+        except string.atoi_error:
+            selector = sys.argv[1]
+            host = sys.argv[2]
+            port = ''
+        browser(selector, host, port)
+    elif sys.argv[1:]:
+        browser('', sys.argv[1])
+    else:
+        browser()
 
 # Call the test program as a main program
 test()
diff --git a/Demo/sockets/mcast.py b/Demo/sockets/mcast.py
index 71bcc75..122dad7 100755
--- a/Demo/sockets/mcast.py
+++ b/Demo/sockets/mcast.py
@@ -19,76 +19,76 @@ from socket import *
 
 # Main program
 def main():
-	flags = sys.argv[1:]
-	#
-	if flags:
-		sender(flags[0])
-	else:
-		receiver()
+    flags = sys.argv[1:]
+    #
+    if flags:
+        sender(flags[0])
+    else:
+        receiver()
 
 
 # Sender subroutine (only one per local area network)
 def sender(flag):
-	s = socket(AF_INET, SOCK_DGRAM)
-	if flag == '-b':
-		s.setsockopt(SOL_SOCKET, SO_BROADCAST, 1)
-		mygroup = '<broadcast>'
-	else:
-		mygroup = MYGROUP
-		ttl = struct.pack('b', 1)		# Time-to-live
-		s.setsockopt(IPPROTO_IP, IP_MULTICAST_TTL, ttl)
-	while 1:
-		data = repr(time.time())
-##		data = data + (1400 - len(data)) * '\0'
-		s.sendto(data, (mygroup, MYPORT))
-		time.sleep(1)
+    s = socket(AF_INET, SOCK_DGRAM)
+    if flag == '-b':
+        s.setsockopt(SOL_SOCKET, SO_BROADCAST, 1)
+        mygroup = '<broadcast>'
+    else:
+        mygroup = MYGROUP
+        ttl = struct.pack('b', 1)               # Time-to-live
+        s.setsockopt(IPPROTO_IP, IP_MULTICAST_TTL, ttl)
+    while 1:
+        data = repr(time.time())
+##              data = data + (1400 - len(data)) * '\0'
+        s.sendto(data, (mygroup, MYPORT))
+        time.sleep(1)
 
 
 # Receiver subroutine (as many as you like)
 def receiver():
-	# Open and initialize the socket
-	s = openmcastsock(MYGROUP, MYPORT)
-	#
-	# Loop, printing any data we receive
-	while 1:
-		data, sender = s.recvfrom(1500)
-		while data[-1:] == '\0': data = data[:-1] # Strip trailing \0's
-		print sender, ':', repr(data)
+    # Open and initialize the socket
+    s = openmcastsock(MYGROUP, MYPORT)
+    #
+    # Loop, printing any data we receive
+    while 1:
+        data, sender = s.recvfrom(1500)
+        while data[-1:] == '\0': data = data[:-1] # Strip trailing \0's
+        print sender, ':', repr(data)
 
 
 # Open a UDP socket, bind it to a port and select a multicast group
 def openmcastsock(group, port):
-	# Import modules used only here
-	import string
-	import struct
-	#
-	# Create a socket
-	s = socket(AF_INET, SOCK_DGRAM)
-	#
-	# Allow multiple copies of this program on one machine
-	# (not strictly needed)
-	s.setsockopt(SOL_SOCKET, SO_REUSEADDR, 1)
-	#
-	# Bind it to the port
-	s.bind(('', port))
-	#
-	# Look up multicast group address in name server
-	# (doesn't hurt if it is already in ddd.ddd.ddd.ddd format)
-	group = gethostbyname(group)
-	#
-	# Construct binary group address
-	bytes = map(int, string.split(group, "."))
-	grpaddr = 0
-	for byte in bytes: grpaddr = (grpaddr << 8) | byte
-	#
-	# Construct struct mreq from grpaddr and ifaddr
-	ifaddr = INADDR_ANY
-	mreq = struct.pack('ll', htonl(grpaddr), htonl(ifaddr))
-	#
-	# Add group membership
-	s.setsockopt(IPPROTO_IP, IP_ADD_MEMBERSHIP, mreq)
-	#
-	return s
+    # Import modules used only here
+    import string
+    import struct
+    #
+    # Create a socket
+    s = socket(AF_INET, SOCK_DGRAM)
+    #
+    # Allow multiple copies of this program on one machine
+    # (not strictly needed)
+    s.setsockopt(SOL_SOCKET, SO_REUSEADDR, 1)
+    #
+    # Bind it to the port
+    s.bind(('', port))
+    #
+    # Look up multicast group address in name server
+    # (doesn't hurt if it is already in ddd.ddd.ddd.ddd format)
+    group = gethostbyname(group)
+    #
+    # Construct binary group address
+    bytes = map(int, string.split(group, "."))
+    grpaddr = 0
+    for byte in bytes: grpaddr = (grpaddr << 8) | byte
+    #
+    # Construct struct mreq from grpaddr and ifaddr
+    ifaddr = INADDR_ANY
+    mreq = struct.pack('ll', htonl(grpaddr), htonl(ifaddr))
+    #
+    # Add group membership
+    s.setsockopt(IPPROTO_IP, IP_ADD_MEMBERSHIP, mreq)
+    #
+    return s
 
 
 main()
diff --git a/Demo/sockets/radio.py b/Demo/sockets/radio.py
index b68a4ec..fa4ce75 100755
--- a/Demo/sockets/radio.py
+++ b/Demo/sockets/radio.py
@@ -9,6 +9,6 @@ s = socket(AF_INET, SOCK_DGRAM)
 s.bind(('', MYPORT))
 
 while 1:
-	data, wherefrom = s.recvfrom(1500, 0)
-	sys.stderr.write(repr(wherefrom) + '\n')
-	sys.stdout.write(data)
+    data, wherefrom = s.recvfrom(1500, 0)
+    sys.stderr.write(repr(wherefrom) + '\n')
+    sys.stdout.write(data)
diff --git a/Demo/sockets/rpython.py b/Demo/sockets/rpython.py
index 77b2a7a..8333d39 100755
--- a/Demo/sockets/rpython.py
+++ b/Demo/sockets/rpython.py
@@ -11,25 +11,25 @@ PORT = 4127
 BUFSIZE = 1024
 
 def main():
-	if len(sys.argv) < 3:
-		print "usage: rpython host command"
-		sys.exit(2)
-	host = sys.argv[1]
-	port = PORT
-	i = string.find(host, ':')
-	if i >= 0:
-		port = string.atoi(port[i+1:])
-		host = host[:i]
-	command = string.join(sys.argv[2:])
-	s = socket(AF_INET, SOCK_STREAM)
-	s.connect((host, port))
-	s.send(command)
-	s.shutdown(1)
-	reply = ''
-	while 1:
-		data = s.recv(BUFSIZE)
-		if not data: break
-		reply = reply + data
-	print reply,
+    if len(sys.argv) < 3:
+        print "usage: rpython host command"
+        sys.exit(2)
+    host = sys.argv[1]
+    port = PORT
+    i = string.find(host, ':')
+    if i >= 0:
+        port = string.atoi(port[i+1:])
+        host = host[:i]
+    command = string.join(sys.argv[2:])
+    s = socket(AF_INET, SOCK_STREAM)
+    s.connect((host, port))
+    s.send(command)
+    s.shutdown(1)
+    reply = ''
+    while 1:
+        data = s.recv(BUFSIZE)
+        if not data: break
+        reply = reply + data
+    print reply,
 
 main()
diff --git a/Demo/sockets/rpythond.py b/Demo/sockets/rpythond.py
index 1109a99..81397d6 100755
--- a/Demo/sockets/rpythond.py
+++ b/Demo/sockets/rpythond.py
@@ -14,39 +14,39 @@ PORT = 4127
 BUFSIZE = 1024
 
 def main():
-	if len(sys.argv) > 1:
-		port = int(eval(sys.argv[1]))
-	else:
-		port = PORT
-	s = socket(AF_INET, SOCK_STREAM)
-	s.bind(('', port))
-	s.listen(1)
-	while 1:
-		conn, (remotehost, remoteport) = s.accept()
-		print 'connected by', remotehost, remoteport
-		request = ''
-		while 1:
-			data = conn.recv(BUFSIZE)
-			if not data:
-				break
-			request = request + data
-		reply = execute(request)
-		conn.send(reply)
-		conn.close()
+    if len(sys.argv) > 1:
+        port = int(eval(sys.argv[1]))
+    else:
+        port = PORT
+    s = socket(AF_INET, SOCK_STREAM)
+    s.bind(('', port))
+    s.listen(1)
+    while 1:
+        conn, (remotehost, remoteport) = s.accept()
+        print 'connected by', remotehost, remoteport
+        request = ''
+        while 1:
+            data = conn.recv(BUFSIZE)
+            if not data:
+                break
+            request = request + data
+        reply = execute(request)
+        conn.send(reply)
+        conn.close()
 
 def execute(request):
-	stdout = sys.stdout
-	stderr = sys.stderr
-	sys.stdout = sys.stderr = fakefile = StringIO.StringIO()
-	try:
-		try:
-			exec request in {}, {}
-		except:
-			print
-			traceback.print_exc(100)
-	finally:
-		sys.stderr = stderr
-		sys.stdout = stdout
-	return fakefile.getvalue()
+    stdout = sys.stdout
+    stderr = sys.stderr
+    sys.stdout = sys.stderr = fakefile = StringIO.StringIO()
+    try:
+        try:
+            exec request in {}, {}
+        except:
+            print
+            traceback.print_exc(100)
+    finally:
+        sys.stderr = stderr
+        sys.stdout = stdout
+    return fakefile.getvalue()
 
 main()
diff --git a/Demo/sockets/telnet.py b/Demo/sockets/telnet.py
index d86cbeb..d50c37f 100755
--- a/Demo/sockets/telnet.py
+++ b/Demo/sockets/telnet.py
@@ -20,90 +20,90 @@ BUFSIZE = 1024
 
 # Telnet protocol characters
 
-IAC  = chr(255)	# Interpret as command
+IAC  = chr(255) # Interpret as command
 DONT = chr(254)
 DO   = chr(253)
 WONT = chr(252)
 WILL = chr(251)
 
 def main():
-	host = sys.argv[1]
-	try:
-		hostaddr = gethostbyname(host)
-	except error:
-		sys.stderr.write(sys.argv[1] + ': bad host name\n')
-		sys.exit(2)
-	#
-	if len(sys.argv) > 2:
-		servname = sys.argv[2]
-	else:
-		servname = 'telnet'
-	#
-	if '0' <= servname[:1] <= '9':
-		port = eval(servname)
-	else:
-		try:
-			port = getservbyname(servname, 'tcp')
-		except error:
-			sys.stderr.write(servname + ': bad tcp service name\n')
-			sys.exit(2)
-	#
-	s = socket(AF_INET, SOCK_STREAM)
-	#
-	try:
-		s.connect((host, port))
-	except error, msg:
-		sys.stderr.write('connect failed: ' + repr(msg) + '\n')
-		sys.exit(1)
-	#
-	pid = posix.fork()
-	#
-	if pid == 0:
-		# child -- read stdin, write socket
-		while 1:
-			line = sys.stdin.readline()
-			s.send(line)
-	else:
-		# parent -- read socket, write stdout
-		iac = 0		# Interpret next char as command
-		opt = ''	# Interpret next char as option
-		while 1:
-			data = s.recv(BUFSIZE)
-			if not data:
-				# EOF; kill child and exit
-				sys.stderr.write( '(Closed by remote host)\n')
-				posix.kill(pid, 9)
-				sys.exit(1)
-			cleandata = ''
-			for c in data:
-				if opt:
-					print ord(c)
-					s.send(opt + c)
-					opt = ''
-				elif iac:
-					iac = 0
-					if c == IAC:
-						cleandata = cleandata + c
-					elif c in (DO, DONT):
-						if c == DO: print '(DO)',
-						else: print '(DONT)',
-						opt = IAC + WONT
-					elif c in (WILL, WONT):
-						if c == WILL: print '(WILL)',
-						else: print '(WONT)',
-						opt = IAC + DONT
-					else:
-						print '(command)', ord(c)
-				elif c == IAC:
-					iac = 1
-					print '(IAC)',
-				else:
-					cleandata = cleandata + c
-			sys.stdout.write(cleandata)
-			sys.stdout.flush()
+    host = sys.argv[1]
+    try:
+        hostaddr = gethostbyname(host)
+    except error:
+        sys.stderr.write(sys.argv[1] + ': bad host name\n')
+        sys.exit(2)
+    #
+    if len(sys.argv) > 2:
+        servname = sys.argv[2]
+    else:
+        servname = 'telnet'
+    #
+    if '0' <= servname[:1] <= '9':
+        port = eval(servname)
+    else:
+        try:
+            port = getservbyname(servname, 'tcp')
+        except error:
+            sys.stderr.write(servname + ': bad tcp service name\n')
+            sys.exit(2)
+    #
+    s = socket(AF_INET, SOCK_STREAM)
+    #
+    try:
+        s.connect((host, port))
+    except error, msg:
+        sys.stderr.write('connect failed: ' + repr(msg) + '\n')
+        sys.exit(1)
+    #
+    pid = posix.fork()
+    #
+    if pid == 0:
+        # child -- read stdin, write socket
+        while 1:
+            line = sys.stdin.readline()
+            s.send(line)
+    else:
+        # parent -- read socket, write stdout
+        iac = 0         # Interpret next char as command
+        opt = ''        # Interpret next char as option
+        while 1:
+            data = s.recv(BUFSIZE)
+            if not data:
+                # EOF; kill child and exit
+                sys.stderr.write( '(Closed by remote host)\n')
+                posix.kill(pid, 9)
+                sys.exit(1)
+            cleandata = ''
+            for c in data:
+                if opt:
+                    print ord(c)
+                    s.send(opt + c)
+                    opt = ''
+                elif iac:
+                    iac = 0
+                    if c == IAC:
+                        cleandata = cleandata + c
+                    elif c in (DO, DONT):
+                        if c == DO: print '(DO)',
+                        else: print '(DONT)',
+                        opt = IAC + WONT
+                    elif c in (WILL, WONT):
+                        if c == WILL: print '(WILL)',
+                        else: print '(WONT)',
+                        opt = IAC + DONT
+                    else:
+                        print '(command)', ord(c)
+                elif c == IAC:
+                    iac = 1
+                    print '(IAC)',
+                else:
+                    cleandata = cleandata + c
+            sys.stdout.write(cleandata)
+            sys.stdout.flush()
 
 
 try:
-	main()
+    main()
 except KeyboardInterrupt:
-	pass
+    pass
diff --git a/Demo/sockets/throughput.py b/Demo/sockets/throughput.py
index fa250e7..b8df1f3 100755
--- a/Demo/sockets/throughput.py
+++ b/Demo/sockets/throughput.py
@@ -3,8 +3,8 @@
 # Test network throughput.
 #
 # Usage:
-# 1) on host_A: throughput -s [port]			# start a server
-# 2) on host_B: throughput -c  count host_A [port]	# start a client
+# 1) on host_A: throughput -s [port]                    # start a server
+# 2) on host_B: throughput -c  count host_A [port]      # start a client
 #
 # The server will service multiple clients until it is killed.
 #
@@ -21,73 +21,73 @@ BUFSIZE = 1024
 
 
 def main():
-	if len(sys.argv) < 2:
-		usage()
-	if sys.argv[1] == '-s':
-		server()
-	elif sys.argv[1] == '-c':
-		client()
-	else:
-		usage()
+    if len(sys.argv) < 2:
+        usage()
+    if sys.argv[1] == '-s':
+        server()
+    elif sys.argv[1] == '-c':
+        client()
+    else:
+        usage()
 
 
 def usage():
-	sys.stdout = sys.stderr
-	print 'Usage:    (on host_A) throughput -s [port]'
-	print 'and then: (on host_B) throughput -c count host_A [port]'
-	sys.exit(2)
+    sys.stdout = sys.stderr
+    print 'Usage:    (on host_A) throughput -s [port]'
+    print 'and then: (on host_B) throughput -c count host_A [port]'
+    sys.exit(2)
 
 
 def server():
-	if len(sys.argv) > 2:
-		port = eval(sys.argv[2])
-	else:
-		port = MY_PORT
-	s = socket(AF_INET, SOCK_STREAM)
-	s.bind(('', port))
-	s.listen(1)
-	print 'Server ready...'
-	while 1:
-		conn, (host, remoteport) = s.accept()
-		while 1:
-			data = conn.recv(BUFSIZE)
-			if not data:
-				break
-			del data
-		conn.send('OK\n')
-		conn.close()
-		print 'Done with', host, 'port', remoteport
+    if len(sys.argv) > 2:
+        port = eval(sys.argv[2])
+    else:
+        port = MY_PORT
+    s = socket(AF_INET, SOCK_STREAM)
+    s.bind(('', port))
+    s.listen(1)
+    print 'Server ready...'
+    while 1:
+        conn, (host, remoteport) = s.accept()
+        while 1:
+            data = conn.recv(BUFSIZE)
+            if not data:
+                break
+            del data
+        conn.send('OK\n')
+        conn.close()
+        print 'Done with', host, 'port', remoteport
 
 
 def client():
-	if len(sys.argv) < 4:
-		usage()
-	count = int(eval(sys.argv[2]))
-	host = sys.argv[3]
-	if len(sys.argv) > 4:
-		port = eval(sys.argv[4])
-	else:
-		port = MY_PORT
-	testdata = 'x' * (BUFSIZE-1) + '\n'
-	t1 = time.time()
-	s = socket(AF_INET, SOCK_STREAM)
-	t2 = time.time()
-	s.connect((host, port))
-	t3 = time.time()
-	i = 0
-	while i < count:
-		i = i+1
-		s.send(testdata)
-	s.shutdown(1) # Send EOF
-	t4 = time.time()
-	data = s.recv(BUFSIZE)
-	t5 = time.time()
-	print data
-	print 'Raw timers:', t1, t2, t3, t4, t5
-	print 'Intervals:', t2-t1, t3-t2, t4-t3, t5-t4
-	print 'Total:', t5-t1
-	print 'Throughput:', round((BUFSIZE*count*0.001) / (t5-t1), 3),
-	print 'K/sec.'
+    if len(sys.argv) < 4:
+        usage()
+    count = int(eval(sys.argv[2]))
+    host = sys.argv[3]
+    if len(sys.argv) > 4:
+        port = eval(sys.argv[4])
+    else:
+        port = MY_PORT
+    testdata = 'x' * (BUFSIZE-1) + '\n'
+    t1 = time.time()
+    s = socket(AF_INET, SOCK_STREAM)
+    t2 = time.time()
+    s.connect((host, port))
+    t3 = time.time()
+    i = 0
+    while i < count:
+        i = i+1
+        s.send(testdata)
+    s.shutdown(1) # Send EOF
+    t4 = time.time()
+    data = s.recv(BUFSIZE)
+    t5 = time.time()
+    print data
+    print 'Raw timers:', t1, t2, t3, t4, t5
+    print 'Intervals:', t2-t1, t3-t2, t4-t3, t5-t4
+    print 'Total:', t5-t1
+    print 'Throughput:', round((BUFSIZE*count*0.001) / (t5-t1), 3),
+    print 'K/sec.'
 
 
 main()
diff --git a/Demo/sockets/udpecho.py b/Demo/sockets/udpecho.py
index 720cfe1..5181c82 100755
--- a/Demo/sockets/udpecho.py
+++ b/Demo/sockets/udpecho.py
@@ -12,52 +12,52 @@ ECHO_PORT = 50000 + 7
 BUFSIZE = 1024
 
 def main():
-	if len(sys.argv) < 2:
-		usage()
-	if sys.argv[1] == '-s':
-		server()
-	elif sys.argv[1] == '-c':
-		client()
-	else:
-		usage()
+    if len(sys.argv) < 2:
+        usage()
+    if sys.argv[1] == '-s':
+        server()
+    elif sys.argv[1] == '-c':
+        client()
+    else:
+        usage()
 
 def usage():
-	sys.stdout = sys.stderr
-	print 'Usage: udpecho -s [port]            (server)'
-	print 'or:    udpecho -c host [port] <file (client)'
-	sys.exit(2)
+    sys.stdout = sys.stderr
+    print 'Usage: udpecho -s [port]            (server)'
+    print 'or:    udpecho -c host [port] <file (client)'
+    sys.exit(2)
 
 def server():
-	if len(sys.argv) > 2:
-		port = eval(sys.argv[2])
-	else:
-		port = ECHO_PORT
-	s = socket(AF_INET, SOCK_DGRAM)
-	s.bind(('', port))
-	print 'udp echo server ready'
-	while 1:
-		data, addr = s.recvfrom(BUFSIZE)
-		print 'server received %r from %r' % (data, addr)
-		s.sendto(data, addr)
+    if len(sys.argv) > 2:
+        port = eval(sys.argv[2])
+    else:
+        port = ECHO_PORT
+    s = socket(AF_INET, SOCK_DGRAM)
+    s.bind(('', port))
+    print 'udp echo server ready'
+    while 1:
+        data, addr = s.recvfrom(BUFSIZE)
+        print 'server received %r from %r' % (data, addr)
+        s.sendto(data, addr)
 
 def client():
-	if len(sys.argv) < 3:
-		usage()
-	host = sys.argv[2]
-	if len(sys.argv) > 3:
-		port = eval(sys.argv[3])
-	else:
-		port = ECHO_PORT
-	addr = host, port
-	s = socket(AF_INET, SOCK_DGRAM)
-	s.bind(('', 0))
-	print 'udp echo client ready, reading stdin'
-	while 1:
-		line = sys.stdin.readline()
-		if not line:
-			break
-		s.sendto(line, addr)
-		data, fromaddr = s.recvfrom(BUFSIZE)
-		print 'client received %r from %r' % (data, fromaddr)
+    if len(sys.argv) < 3:
+        usage()
+    host = sys.argv[2]
+    if len(sys.argv) > 3:
+        port = eval(sys.argv[3])
+    else:
+        port = ECHO_PORT
+    addr = host, port
+    s = socket(AF_INET, SOCK_DGRAM)
+    s.bind(('', 0))
+    print 'udp echo client ready, reading stdin'
+    while 1:
+        line = sys.stdin.readline()
+        if not line:
+            break
+        s.sendto(line, addr)
+        data, fromaddr = s.recvfrom(BUFSIZE)
+        print 'client received %r from %r' % (data, fromaddr)
 
 main()
diff --git a/Demo/sockets/unicast.py b/Demo/sockets/unicast.py
index 0a30f35..dd15e3c 100644
--- a/Demo/sockets/unicast.py
+++ b/Demo/sockets/unicast.py
@@ -9,8 +9,6 @@ s = socket(AF_INET, SOCK_DGRAM)
 s.bind(('', 0))
 
 while 1:
-	data = repr(time.time()) + '\n'
-	s.sendto(data, ('', MYPORT))
-	time.sleep(2)
-
-	
+    data = repr(time.time()) + '\n'
+    s.sendto(data, ('', MYPORT))
+    time.sleep(2)
diff --git a/Demo/sockets/unixserver.py b/Demo/sockets/unixserver.py
index d4425f0..5eccabb 100644
--- a/Demo/sockets/unixserver.py
+++ b/Demo/sockets/unixserver.py
@@ -2,7 +2,7 @@
 # Piet van Oostrum
 import os
 from socket import *
-FILE = 'blabla'             
+FILE = 'blabla'
 s = socket(AF_UNIX, SOCK_STREAM)
 s.bind(FILE)
 print 'Sock name is: ['+s.getsockname()+']'