Second Life viewer sources 1.23.0-RC

6 files changed, 561 insertions, 21 deletions

diff --git a/linden/indra/lib/python/indra/base/config.py b/linden/indra/lib/python/indra/base/config.py
index d6866fd..adafa29 100644
--- a/linden/indra/lib/python/indra/base/config.py
+++ b/linden/indra/lib/python/indra/base/config.py
@@ -27,6 +27,7 @@ $/LicenseInfo$
 """
 
 import copy
+import errno
 import os
 import traceback
 import time
@@ -62,6 +63,8 @@ class IndraConfig(object):
         self._load()
 
     def _load(self):
+        # if you initialize the IndraConfig with None, no attempt
+        # is made to load any files
         if self._indra_config_file is None:
             return
 
@@ -164,22 +167,36 @@ class IndraConfig(object):
         """
         return copy.deepcopy(self._combined_dict)
 
-def load(indra_xml_file = None):
+def load(config_xml_file = None):
     global _g_config
 
-    if indra_xml_file is None:
+    load_default_files = config_xml_file is None
+    if load_default_files:
         ## going from:
         ## "/opt/linden/indra/lib/python/indra/base/config.py"
         ## to:
         ## "/opt/linden/etc/indra.xml"
-        indra_xml_file = realpath(
+        config_xml_file = realpath(
             dirname(realpath(__file__)) + "../../../../../../etc/indra.xml")
 
     try:
-        _g_config = IndraConfig(indra_xml_file)
+        _g_config = IndraConfig(config_xml_file)
     except IOError:
-        # indra.xml was not openable, so let's initialize with an empty dict
-        # some code relies on config behaving this way
+        # Failure to load passed in file
+        # or indra.xml default file
+        if load_default_files:
+            try:
+                config_xml_file = realpath(
+                    dirname(realpath(__file__)) + "../../../../../../etc/globals.xml")
+                _g_config = IndraConfig(config_xml_file)
+                return
+            except IOError:
+                # Failure to load globals.xml
+                # fall to code below
+                pass
+
+        # Either failed to load passed in file
+        # or failed to load all default files
         _g_config = IndraConfig(None)
 
 def dump(indra_xml_file, indra_cfg = None, update_in_mem=False):
diff --git a/linden/indra/lib/python/indra/base/llsd.py b/linden/indra/lib/python/indra/base/llsd.py
index 4a575fc..9534d59 100644
--- a/linden/indra/lib/python/indra/base/llsd.py
+++ b/linden/indra/lib/python/indra/base/llsd.py
@@ -28,6 +28,7 @@ $/LicenseInfo$
 
 import datetime
 import base64
+import string
 import struct
 import time
 import types
@@ -36,10 +37,13 @@ import re
 from indra.util.fastest_elementtree import ElementTreeError, fromstring
 from indra.base import lluuid
 
-try:
-    import cllsd
-except ImportError:
-    cllsd = None
+# cllsd.c in server/server-1.25 has memory leaks,
+#   so disabling cllsd for now
+#try:
+#    import cllsd
+#except ImportError:
+#    cllsd = None
+cllsd = None
 
 int_regex = re.compile(r"[-+]?\d+")
 real_regex = re.compile(r"[-+]?(\d+(\.\d*)?|\d*\.\d+)([eE][-+]?\d+)?")
@@ -126,6 +130,7 @@ def date_to_python(node):
     if not val:
         val = "1970-01-01T00:00:00Z"
     return parse_datestr(val)
+    
 
 def uri_to_python(node):
     val = node.text or ''
@@ -936,6 +941,7 @@ def parse_notation(something):
 
 def parse(something):
     try:
+        something = string.lstrip(something)   #remove any pre-trailing whitespace
         if something.startswith('<?llsd/binary?>'):
             return parse_binary(something)
         # This should be better.
diff --git a/linden/indra/lib/python/indra/ipc/servicebuilder.py b/linden/indra/lib/python/indra/ipc/servicebuilder.py
index b5872de..04ccee7 100644
--- a/linden/indra/lib/python/indra/ipc/servicebuilder.py
+++ b/linden/indra/lib/python/indra/ipc/servicebuilder.py
@@ -51,12 +51,10 @@ def build(name, context={}, **kwargs):
      > servicebuilder.build('version-manager-version', context, version='1.18.1.2')
        'http://int.util.vaak.lindenlab.com/channel/Second%20Life%20Release/1.18.1.2'
     """
-    context = context.copy()  # shouldn't modify the caller's dictionary
-    context.update(kwargs)
     global _g_builder
     if _g_builder is None:
         _g_builder = ServiceBuilder()
-    return _g_builder.buildServiceURL(name, context)
+    return _g_builder.buildServiceURL(name, context, **kwargs)
 
 class ServiceBuilder(object):
     def __init__(self, services_definition = services_config):
@@ -81,13 +79,36 @@ class ServiceBuilder(object):
             else:
                 self.builders[service['name']] = service_builder
 
-    def buildServiceURL(self, name, context):
+    def buildServiceURL(self, name, context={}, **kwargs):
         """\
         @brief given the environment on construction, return a service URL.
         @param name The name of the service.
         @param context A dict of name value lookups for the service.
+        @param kwargs Any keyword arguments are treated as members of the
+            context, this allows you to be all 31337 by writing shit like:
+            servicebuilder.build('name', param=value)
         @returns Returns the 
         """
+        context = context.copy()  # shouldn't modify the caller's dictionary
+        context.update(kwargs)
         base_url = config.get('services-base-url')
         svc_path = russ.format(self.builders[name], context)
         return base_url + svc_path
+
+
+def on_in(query_name, host_key, schema_key):
+    """\
+    @brief Constructs an on/in snippet (for running named queries)
+    from a schema name and two keys referencing values stored in
+    indra.xml.
+
+    @param query_name Name of the query.
+    @param host_key Logical name of destination host.  Will be
+        looked up in indra.xml.
+    @param schema_key Logical name of destination schema.  Will
+        be looked up in indra.xml.
+    """
+    host_name = config.get(host_key)
+    schema_name = config.get(schema_key)
+    return '/'.join( ('on', host_name, 'in', schema_name, query_name.lstrip('/')) )
+
diff --git a/linden/indra/lib/python/indra/util/llmanifest.py b/linden/indra/lib/python/indra/util/llmanifest.py
index 12e33f2..59c84e5 100644
--- a/linden/indra/lib/python/indra/util/llmanifest.py
+++ b/linden/indra/lib/python/indra/util/llmanifest.py
@@ -452,7 +452,7 @@ class LLManifest(object):
             # *TODO is this gonna be useful?
             print "Cleaning up " + c
 
-    def process_file(self, src, dst, strip=False):
+    def process_file(self, src, dst):
         if self.includes(src, dst):
 #            print src, "=>", dst
             for action in self.actions:
@@ -460,7 +460,7 @@ class LLManifest(object):
                 method = getattr(self, methodname, None)
                 if method is not None:
                     method(src, dst)
-            self.file_list.append([src, dst, strip])
+            self.file_list.append([src, dst])
             return 1
         else:
             sys.stdout.write(" (excluding %r, %r)" % (src, dst))
@@ -607,7 +607,7 @@ class LLManifest(object):
             d = src_re.sub(d_template, s.replace('\\', '/'))
             yield os.path.normpath(s), os.path.normpath(d)
 
-    def path(self, src, dst=None, strip=False):
+    def path(self, src, dst=None):
         sys.stdout.write("Processing %s => %s ... " % (src, dst))
         sys.stdout.flush()
         if src == None:
@@ -622,7 +622,7 @@ class LLManifest(object):
             if self.wildcard_pattern.search(src):
                 for s,d in self.expand_globs(src, dst):
                     assert(s != d)
-                    count += self.process_file(s, d, strip)
+                    count += self.process_file(s, d)
             else:
                 # if we're specifying a single path (not a glob),
                 # we should error out if it doesn't exist
@@ -631,7 +631,7 @@ class LLManifest(object):
                 if os.path.isdir(src):
                     count += self.process_directory(src, dst)
                 else:
-                    count += self.process_file(src, dst, strip)
+                    count += self.process_file(src, dst)
             return count
         try:
             count = try_path(os.path.join(self.get_src_prefix(), src))
diff --git a/linden/indra/lib/python/indra/util/named_query.py b/linden/indra/lib/python/indra/util/named_query.py
index cbde2d9..688a520 100644
--- a/linden/indra/lib/python/indra/util/named_query.py
+++ b/linden/indra/lib/python/indra/util/named_query.py
@@ -47,6 +47,8 @@ except NameError:
 from indra.base import llsd
 from indra.base import config
 
+DEBUG = False
+
 NQ_FILE_SUFFIX = config.get('named-query-file-suffix', '.nq')
 NQ_FILE_SUFFIX_LEN  = len(NQ_FILE_SUFFIX)
 
@@ -63,7 +65,9 @@ def _init_g_named_manager(sql_dir = None):
 
     # extra fallback directory in case config doesn't return what we want
     if sql_dir is None:
-        sql_dir = os.path.join(os.path.dirname(__file__), "..", "..", "..", "..", "web", "dataservice", "sql")
+        sql_dir = os.path.abspath(
+            os.path.join(
+            os.path.realpath(os.path.dirname(__file__)), "..", "..", "..", "..", "web", "dataservice", "sql"))
 
     global _g_named_manager
     _g_named_manager = NamedQueryManager(
@@ -188,6 +192,16 @@ class NamedQuery(object):
         ready them for use in LIKE statements"""
         if sql:
             #print >>sys.stderr, "sql:",sql
+            
+            # This first sub is to properly escape any % signs that
+            # are meant to be literally passed through to mysql in the
+            # query.  It leaves any %'s that are used for
+            # like-expressions.
+            expr = re.compile("(?<=[^a-zA-Z0-9_-])%(?=[^:])")
+            sql = expr.sub('%%', sql)
+
+            # This should tackle the rest of the %'s in the query, by
+            # converting them to LIKE clauses.
             expr = re.compile("(%?):([a-zA-Z][a-zA-Z0-9_-]*)%")
             sql = expr.sub(self._prepare_like, sql)
             expr = re.compile("#:([a-zA-Z][a-zA-Z0-9_-]*)")
@@ -339,7 +353,8 @@ class NamedQuery(object):
             cursor = connection.cursor()
         
         statement = self.sql(connection, params)
-        #print "SQL:", statement
+        if DEBUG:
+            print "SQL:", statement
         rows = cursor.execute(statement)
         
         # *NOTE: the expect_rows argument is a very cheesy way to get some
diff --git a/linden/indra/lib/python/uuid.py b/linden/indra/lib/python/uuid.py
new file mode 100644
index 0000000..48dac84
--- /dev/null
+++ b/linden/indra/lib/python/uuid.py
@@ -0,0 +1,481 @@
+r"""UUID objects (universally unique identifiers) according to RFC 4122.
+
+This module provides immutable UUID objects (class UUID) and the functions
+uuid1(), uuid3(), uuid4(), uuid5() for generating version 1, 3, 4, and 5
+UUIDs as specified in RFC 4122.
+
+If all you want is a unique ID, you should probably call uuid1() or uuid4().
+Note that uuid1() may compromise privacy since it creates a UUID containing
+the computer's network address.  uuid4() creates a random UUID.
+
+Typical usage:
+
+    >>> import uuid
+
+    # make a UUID based on the host ID and current time
+    >>> uuid.uuid1()
+    UUID('a8098c1a-f86e-11da-bd1a-00112444be1e')
+
+    # make a UUID using an MD5 hash of a namespace UUID and a name
+    >>> uuid.uuid3(uuid.NAMESPACE_DNS, 'python.org')
+    UUID('6fa459ea-ee8a-3ca4-894e-db77e160355e')
+
+    # make a random UUID
+    >>> uuid.uuid4()
+    UUID('16fd2706-8baf-433b-82eb-8c7fada847da')
+
+    # make a UUID using a SHA-1 hash of a namespace UUID and a name
+    >>> uuid.uuid5(uuid.NAMESPACE_DNS, 'python.org')
+    UUID('886313e1-3b8a-5372-9b90-0c9aee199e5d')
+
+    # make a UUID from a string of hex digits (braces and hyphens ignored)
+    >>> x = uuid.UUID('{00010203-0405-0607-0809-0a0b0c0d0e0f}')
+
+    # convert a UUID to a string of hex digits in standard form
+    >>> str(x)
+    '00010203-0405-0607-0809-0a0b0c0d0e0f'
+
+    # get the raw 16 bytes of the UUID
+    >>> x.bytes
+    '\x00\x01\x02\x03\x04\x05\x06\x07\x08\t\n\x0b\x0c\r\x0e\x0f'
+
+    # make a UUID from a 16-byte string
+    >>> uuid.UUID(bytes=x.bytes)
+    UUID('00010203-0405-0607-0809-0a0b0c0d0e0f')
+
+This module works with Python 2.3 or higher."""
+
+__author__ = 'Ka-Ping Yee <ping@zesty.ca>'
+__date__ = '$Date: 2006/06/12 23:15:40 $'.split()[1].replace('/', '-')
+__version__ = '$Revision: 1.30 $'.split()[1]
+
+RESERVED_NCS, RFC_4122, RESERVED_MICROSOFT, RESERVED_FUTURE = [
+    'reserved for NCS compatibility', 'specified in RFC 4122',
+    'reserved for Microsoft compatibility', 'reserved for future definition']
+
+class UUID(object):
+    """Instances of the UUID class represent UUIDs as specified in RFC 4122.
+    UUID objects are immutable, hashable, and usable as dictionary keys.
+    Converting a UUID to a string with str() yields something in the form
+    '12345678-1234-1234-1234-123456789abc'.  The UUID constructor accepts
+    four possible forms: a similar string of hexadecimal digits, or a
+    string of 16 raw bytes as an argument named 'bytes', or a tuple of
+    six integer fields (with 32-bit, 16-bit, 16-bit, 8-bit, 8-bit, and
+    48-bit values respectively) as an argument named 'fields', or a single
+    128-bit integer as an argument named 'int'.
+    
+    UUIDs have these read-only attributes:
+
+        bytes       the UUID as a 16-byte string
+
+        fields      a tuple of the six integer fields of the UUID,
+                    which are also available as six individual attributes
+                    and two derived attributes:
+
+            time_low                the first 32 bits of the UUID
+            time_mid                the next 16 bits of the UUID
+            time_hi_version         the next 16 bits of the UUID
+            clock_seq_hi_variant    the next 8 bits of the UUID
+            clock_seq_low           the next 8 bits of the UUID
+            node                    the last 48 bits of the UUID
+
+            time                    the 60-bit timestamp
+            clock_seq               the 14-bit sequence number
+
+        hex         the UUID as a 32-character hexadecimal string
+
+        int         the UUID as a 128-bit integer
+
+        urn         the UUID as a URN as specified in RFC 4122
+
+        variant     the UUID variant (one of the constants RESERVED_NCS,
+                    RFC_4122, RESERVED_MICROSOFT, or RESERVED_FUTURE)
+
+        version     the UUID version number (1 through 5, meaningful only
+                    when the variant is RFC_4122)
+    """
+
+    def __init__(self, hex=None, bytes=None, fields=None, int=None,
+                       version=None):
+        r"""Create a UUID from either a string of 32 hexadecimal digits,
+        a string of 16 bytes as the 'bytes' argument, a tuple of six
+        integers (32-bit time_low, 16-bit time_mid, 16-bit time_hi_version,
+        8-bit clock_seq_hi_variant, 8-bit clock_seq_low, 48-bit node) as
+        the 'fields' argument, or a single 128-bit integer as the 'int'
+        argument.  When a string of hex digits is given, curly braces,
+        hyphens, and a URN prefix are all optional.  For example, these
+        expressions all yield the same UUID:
+
+        UUID('{12345678-1234-5678-1234-567812345678}')
+        UUID('12345678123456781234567812345678')
+        UUID('urn:uuid:12345678-1234-5678-1234-567812345678')
+        UUID(bytes='\x12\x34\x56\x78'*4)
+        UUID(fields=(0x12345678, 0x1234, 0x5678, 0x12, 0x34, 0x567812345678))
+        UUID(int=0x12345678123456781234567812345678)
+
+        Exactly one of 'hex', 'bytes', 'fields', or 'int' must be given.
+        The 'version' argument is optional; if given, the resulting UUID
+        will have its variant and version number set according to RFC 4122,
+        overriding bits in the given 'hex', 'bytes', 'fields', or 'int'.
+        """
+
+        if [hex, bytes, fields, int].count(None) != 3:
+            raise TypeError('need just one of hex, bytes, fields, or int')
+        if hex is not None:
+            hex = hex.replace('urn:', '').replace('uuid:', '')
+            hex = hex.strip('{}').replace('-', '')
+            if len(hex) != 32:
+                raise ValueError('badly formed hexadecimal UUID string')
+            int = long(hex, 16)
+        if bytes is not None:
+            if len(bytes) != 16:
+                raise ValueError('bytes is not a 16-char string')
+            int = long(('%02x'*16) % tuple(map(ord, bytes)), 16)
+        if fields is not None:
+            if len(fields) != 6:
+                raise ValueError('fields is not a 6-tuple')
+            (time_low, time_mid, time_hi_version,
+             clock_seq_hi_variant, clock_seq_low, node) = fields
+            if not 0 <= time_low < 1<<32L:
+                raise ValueError('field 1 out of range (need a 32-bit value)')
+            if not 0 <= time_mid < 1<<16L:
+                raise ValueError('field 2 out of range (need a 16-bit value)')
+            if not 0 <= time_hi_version < 1<<16L:
+                raise ValueError('field 3 out of range (need a 16-bit value)')
+            if not 0 <= clock_seq_hi_variant < 1<<8L:
+                raise ValueError('field 4 out of range (need an 8-bit value)')
+            if not 0 <= clock_seq_low < 1<<8L:
+                raise ValueError('field 5 out of range (need an 8-bit value)')
+            if not 0 <= node < 1<<48L:
+                raise ValueError('field 6 out of range (need a 48-bit value)')
+            clock_seq = (clock_seq_hi_variant << 8L) | clock_seq_low
+            int = ((time_low << 96L) | (time_mid << 80L) |
+                   (time_hi_version << 64L) | (clock_seq << 48L) | node)
+        if int is not None:
+            if not 0 <= int < 1<<128L:
+                raise ValueError('int is out of range (need a 128-bit value)')
+        if version is not None:
+            if not 1 <= version <= 5:
+                raise ValueError('illegal version number')
+            # Set the variant to RFC 4122.
+            int &= ~(0xc000 << 48L)
+            int |= 0x8000 << 48L
+            # Set the version number.
+            int &= ~(0xf000 << 64L)
+            int |= version << 76L
+        self.__dict__['int'] = int
+
+    def __cmp__(self, other):
+        if isinstance(other, UUID):
+            return cmp(self.int, other.int)
+        return NotImplemented
+
+    def __hash__(self):
+        return hash(self.int)
+
+    def __int__(self):
+        return self.int
+
+    def __repr__(self):
+        return 'UUID(%r)' % str(self)
+
+    def __setattr__(self, name, value):
+        raise TypeError('UUID objects are immutable')
+
+    def __str__(self):
+        hex = '%032x' % self.int
+        return '%s-%s-%s-%s-%s' % (
+            hex[:8], hex[8:12], hex[12:16], hex[16:20], hex[20:])
+
+    def get_bytes(self):
+        bytes = ''
+        for shift in range(0, 128, 8):
+            bytes = chr((self.int >> shift) & 0xff) + bytes
+        return bytes
+
+    bytes = property(get_bytes)
+
+    def get_fields(self):
+        return (self.time_low, self.time_mid, self.time_hi_version,
+                self.clock_seq_hi_variant, self.clock_seq_low, self.node)
+
+    fields = property(get_fields)
+
+    def get_time_low(self):
+        return self.int >> 96L
+   
+    time_low = property(get_time_low)
+
+    def get_time_mid(self):
+        return (self.int >> 80L) & 0xffff
+
+    time_mid = property(get_time_mid)
+
+    def get_time_hi_version(self):
+        return (self.int >> 64L) & 0xffff
+    
+    time_hi_version = property(get_time_hi_version)
+
+    def get_clock_seq_hi_variant(self):
+        return (self.int >> 56L) & 0xff
+
+    clock_seq_hi_variant = property(get_clock_seq_hi_variant)
+    
+    def get_clock_seq_low(self):
+        return (self.int >> 48L) & 0xff
+
+    clock_seq_low = property(get_clock_seq_low)
+
+    def get_time(self):
+        return (((self.time_hi_version & 0x0fffL) << 48L) |
+                (self.time_mid << 32L) | self.time_low)
+
+    time = property(get_time)
+
+    def get_clock_seq(self):
+        return (((self.clock_seq_hi_variant & 0x3fL) << 8L) |
+                self.clock_seq_low)
+
+    clock_seq = property(get_clock_seq)
+    
+    def get_node(self):
+        return self.int & 0xffffffffffff
+
+    node = property(get_node)
+
+    def get_hex(self):
+        return '%032x' % self.int
+
+    hex = property(get_hex)
+
+    def get_urn(self):
+        return 'urn:uuid:' + str(self)
+
+    urn = property(get_urn)
+
+    def get_variant(self):
+        if not self.int & (0x8000 << 48L):
+            return RESERVED_NCS
+        elif not self.int & (0x4000 << 48L):
+            return RFC_4122
+        elif not self.int & (0x2000 << 48L):
+            return RESERVED_MICROSOFT
+        else:
+            return RESERVED_FUTURE
+
+    variant = property(get_variant)
+
+    def get_version(self):
+        # The version bits are only meaningful for RFC 4122 UUIDs.
+        if self.variant == RFC_4122:
+            return int((self.int >> 76L) & 0xf)
+
+    version = property(get_version)
+
+def _ifconfig_getnode():
+    """Get the hardware address on Unix by running ifconfig."""
+    import os
+    for dir in ['', '/sbin/', '/usr/sbin']:
+        try:
+            path = os.path.join(dir, 'ifconfig')
+            if os.path.exists(path):
+                pipe = os.popen(path)
+            else:
+                continue
+        except IOError:
+            continue
+        for line in pipe:
+            words = line.lower().split()
+            for i in range(len(words)):
+                if words[i] in ['hwaddr', 'ether']:
+                    return int(words[i + 1].replace(':', ''), 16)
+
+def _ipconfig_getnode():
+    """Get the hardware address on Windows by running ipconfig.exe."""
+    import os, re
+    dirs = ['', r'c:\windows\system32', r'c:\winnt\system32']
+    try:
+        import ctypes
+        buffer = ctypes.create_string_buffer(300)
+        ctypes.windll.kernel32.GetSystemDirectoryA(buffer, 300)
+        dirs.insert(0, buffer.value.decode('mbcs'))
+    except:
+        pass
+    for dir in dirs:
+        try:
+            pipe = os.popen(os.path.join(dir, 'ipconfig') + ' /all')
+        except IOError:
+            continue
+        for line in pipe:
+            value = line.split(':')[-1].strip().lower()
+            if re.match('([0-9a-f][0-9a-f]-){5}[0-9a-f][0-9a-f]', value):
+                return int(value.replace('-', ''), 16)
+
+def _netbios_getnode():
+    """Get the hardware address on Windows using NetBIOS calls.
+    See http://support.microsoft.com/kb/118623 for details."""
+    import win32wnet, netbios
+    ncb = netbios.NCB()
+    ncb.Command = netbios.NCBENUM
+    ncb.Buffer = adapters = netbios.LANA_ENUM()
+    adapters._pack()
+    if win32wnet.Netbios(ncb) != 0:
+        return
+    adapters._unpack()
+    for i in range(adapters.length):
+        ncb.Reset()
+        ncb.Command = netbios.NCBRESET
+        ncb.Lana_num = ord(adapters.lana[i])
+        if win32wnet.Netbios(ncb) != 0:
+            continue
+        ncb.Reset()
+        ncb.Command = netbios.NCBASTAT
+        ncb.Lana_num = ord(adapters.lana[i])
+        ncb.Callname = '*'.ljust(16)
+        ncb.Buffer = status = netbios.ADAPTER_STATUS()
+        if win32wnet.Netbios(ncb) != 0:
+            continue
+        status._unpack()
+        bytes = map(ord, status.adapter_address)
+        return ((bytes[0]<<40L) + (bytes[1]<<32L) + (bytes[2]<<24L) +
+                (bytes[3]<<16L) + (bytes[4]<<8L) + bytes[5])
+
+# Thanks to Thomas Heller for ctypes and for his help with its use here.
+
+# If ctypes is available, use it to find system routines for UUID generation.
+_uuid_generate_random = _uuid_generate_time = _UuidCreate = None
+try:
+    import ctypes, ctypes.util
+    _buffer = ctypes.create_string_buffer(16)
+
+    # The uuid_generate_* routines are provided by libuuid on at least
+    # Linux and FreeBSD, and provided by libc on Mac OS X.
+    for libname in ['uuid', 'c']:
+        try:
+            lib = ctypes.CDLL(ctypes.util.find_library(libname))
+        except:
+            continue
+        if hasattr(lib, 'uuid_generate_random'):
+            _uuid_generate_random = lib.uuid_generate_random
+        if hasattr(lib, 'uuid_generate_time'):
+            _uuid_generate_time = lib.uuid_generate_time
+
+    # On Windows prior to 2000, UuidCreate gives a UUID containing the
+    # hardware address.  On Windows 2000 and later, UuidCreate makes a
+    # random UUID and UuidCreateSequential gives a UUID containing the
+    # hardware address.  These routines are provided by the RPC runtime.
+    try:
+        lib = ctypes.windll.rpcrt4
+    except:
+        lib = None
+    _UuidCreate = getattr(lib, 'UuidCreateSequential',
+                          getattr(lib, 'UuidCreate', None))
+except:
+    pass
+
+def _unixdll_getnode():
+    """Get the hardware address on Unix using ctypes."""
+    _uuid_generate_time(_buffer)
+    return UUID(bytes=_buffer.raw).node
+
+def _windll_getnode():
+    """Get the hardware address on Windows using ctypes."""
+    if _UuidCreate(_buffer) == 0:
+        return UUID(bytes=_buffer.raw).node
+
+def _random_getnode():
+    """Get a random node ID, with eighth bit set as suggested by RFC 4122."""
+    import random
+    return random.randrange(0, 1<<48L) | 0x010000000000L
+
+_node = None
+
+def getnode():
+    """Get the hardware address as a 48-bit integer.  The first time this
+    runs, it may launch a separate program, which could be quite slow.  If
+    all attempts to obtain the hardware address fail, we choose a random
+    48-bit number with its eighth bit set to 1 as recommended in RFC 4122."""
+
+    global _node
+    if _node is not None:
+        return _node
+
+    import sys
+    if sys.platform == 'win32':
+        getters = [_windll_getnode, _netbios_getnode, _ipconfig_getnode]
+    else:
+        getters = [_unixdll_getnode, _ifconfig_getnode]
+
+    for getter in getters + [_random_getnode]:
+        try:
+            _node = getter()
+        except:
+            continue
+        if _node is not None:
+            return _node
+
+def uuid1(node=None, clock_seq=None):
+    """Generate a UUID from a host ID, sequence number, and the current time.
+    If 'node' is not given, getnode() is used to obtain the hardware
+    address.  If 'clock_seq' is given, it is used as the sequence number;
+    otherwise a random 14-bit sequence number is chosen."""
+
+    # When the system provides a version-1 UUID generator, use it (but don't
+    # use UuidCreate here because its UUIDs don't conform to RFC 4122).
+    if _uuid_generate_time and node is clock_seq is None:
+        _uuid_generate_time(_buffer)
+        return UUID(bytes=_buffer.raw)
+
+    import time
+    nanoseconds = int(time.time() * 1e9)
+    # 0x01b21dd213814000 is the number of 100-ns intervals between the
+    # UUID epoch 1582-10-15 00:00:00 and the Unix epoch 1970-01-01 00:00:00.
+    timestamp = int(nanoseconds/100) + 0x01b21dd213814000L
+    if clock_seq is None:
+        import random
+        clock_seq = random.randrange(1<<14L) # instead of stable storage
+    time_low = timestamp & 0xffffffffL
+    time_mid = (timestamp >> 32L) & 0xffffL
+    time_hi_version = (timestamp >> 48L) & 0x0fffL
+    clock_seq_low = clock_seq & 0xffL
+    clock_seq_hi_variant = (clock_seq >> 8L) & 0x3fL
+    if node is None:
+        node = getnode()
+    return UUID(fields=(time_low, time_mid, time_hi_version,
+                        clock_seq_hi_variant, clock_seq_low, node), version=1)
+
+def uuid3(namespace, name):
+    """Generate a UUID from the MD5 hash of a namespace UUID and a name."""
+    import md5
+    hash = md5.md5(namespace.bytes + name).digest()
+    return UUID(bytes=hash[:16], version=3)
+
+def uuid4():
+    """Generate a random UUID."""
+
+    # When the system provides a version-4 UUID generator, use it.
+    if _uuid_generate_random:
+        _uuid_generate_random(_buffer)
+        return UUID(bytes=_buffer.raw)
+
+    # Otherwise, get randomness from urandom or the 'random' module.
+    try:
+        import os
+        return UUID(bytes=os.urandom(16), version=4)
+    except:
+        import random
+        bytes = [chr(random.randrange(256)) for i in range(16)]
+        return UUID(bytes=bytes, version=4)
+
+def uuid5(namespace, name):
+    """Generate a UUID from the SHA-1 hash of a namespace UUID and a name."""
+    import sha
+    hash = sha.sha(namespace.bytes + name).digest()
+    return UUID(bytes=hash[:16], version=5)
+
+# The following standard UUIDs are for use with uuid3() or uuid5().
+
+NAMESPACE_DNS = UUID('6ba7b810-9dad-11d1-80b4-00c04fd430c8')
+NAMESPACE_URL = UUID('6ba7b811-9dad-11d1-80b4-00c04fd430c8')
+NAMESPACE_OID = UUID('6ba7b812-9dad-11d1-80b4-00c04fd430c8')
+NAMESPACE_X500 = UUID('6ba7b814-9dad-11d1-80b4-00c04fd430c8')