Add the sleekxmpp library (will be added as a submodule later)

3 files changed, 215 insertions, 0 deletions

diff --git a/sleekxmpp/xmlstream/tostring/__init__.py b/sleekxmpp/xmlstream/tostring/__init__.py
new file mode 100644
index 0000000..5852cba
--- /dev/null
+++ b/sleekxmpp/xmlstream/tostring/__init__.py
@@ -0,0 +1,19 @@
+"""
+    SleekXMPP: The Sleek XMPP Library
+    Copyright (C) 2010  Nathanael C. Fritz
+    This file is part of SleekXMPP.
+
+    See the file LICENSE for copying permission.
+"""
+
+import sys
+
+# Import the correct tostring and xml_escape functions based on the Python
+# version in order to properly handle Unicode.
+
+if sys.version_info < (3, 0):
+    from sleekxmpp.xmlstream.tostring.tostring26 import tostring, xml_escape
+else:
+    from sleekxmpp.xmlstream.tostring.tostring import tostring, xml_escape
+
+__all__ = ['tostring', 'xml_escape']
diff --git a/sleekxmpp/xmlstream/tostring/tostring.py b/sleekxmpp/xmlstream/tostring/tostring.py
new file mode 100644
index 0000000..d8f5c5b
--- /dev/null
+++ b/sleekxmpp/xmlstream/tostring/tostring.py
@@ -0,0 +1,95 @@
+"""
+    SleekXMPP: The Sleek XMPP Library
+    Copyright (C) 2010  Nathanael C. Fritz
+    This file is part of SleekXMPP.
+
+    See the file LICENSE for copying permission.
+"""
+
+
+def tostring(xml=None, xmlns='', stanza_ns='', stream=None, outbuffer=''):
+    """
+    Serialize an XML object to a Unicode string.
+
+    If namespaces are provided using xmlns or stanza_ns, then elements
+    that use those namespaces will not include the xmlns attribute in
+    the output.
+
+    Arguments:
+        xml       -- The XML object to serialize. If the value is None,
+                     then the XML object contained in this stanza
+                     object will be used.
+        xmlns     -- Optional namespace of an element wrapping the XML
+                     object.
+        stanza_ns -- The namespace of the stanza object that contains
+                     the XML object.
+        stream    -- The XML stream that generated the XML object.
+        outbuffer -- Optional buffer for storing serializations during
+                     recursive calls.
+    """
+    # Add previous results to the start of the output.
+    output = [outbuffer]
+
+    # Extract the element's tag name.
+    tag_name = xml.tag.split('}', 1)[-1]
+
+    # Extract the element's namespace if it is defined.
+    if '}' in xml.tag:
+        tag_xmlns = xml.tag.split('}', 1)[0][1:]
+    else:
+        tag_xmlns = ''
+
+    # Output the tag name and derived namespace of the element.
+    namespace = ''
+    if tag_xmlns not in ['', xmlns, stanza_ns]:
+        namespace = ' xmlns="%s"' % tag_xmlns
+        if stream and tag_xmlns in stream.namespace_map:
+            mapped_namespace = stream.namespace_map[tag_xmlns]
+            if mapped_namespace:
+                tag_name = "%s:%s" % (mapped_namespace, tag_name)
+    output.append("<%s" % tag_name)
+    output.append(namespace)
+
+    # Output escaped attribute values.
+    for attrib, value in xml.attrib.items():
+        if '{' not in attrib:
+            value = xml_escape(value)
+            output.append(' %s="%s"' % (attrib, value))
+
+    if len(xml) or xml.text:
+        # If there are additional child elements to serialize.
+        output.append(">")
+        if xml.text:
+            output.append(xml_escape(xml.text))
+        if len(xml):
+            for child in xml.getchildren():
+                output.append(tostring(child, tag_xmlns, stanza_ns, stream))
+        output.append("</%s>" % tag_name)
+    elif xml.text:
+        # If we only have text content.
+        output.append(">%s</%s>" % (xml_escape(xml.text), tag_name))
+    else:
+        # Empty element.
+        output.append(" />")
+    if xml.tail:
+        # If there is additional text after the element.
+        output.append(xml_escape(xml.tail))
+    return ''.join(output)
+
+
+def xml_escape(text):
+    """
+    Convert special characters in XML to escape sequences.
+
+    Arguments:
+        text -- The XML text to convert.
+    """
+    text = list(text)
+    escapes = {'&': '&amp;',
+               '<': '&lt;',
+               '>': '&gt;',
+               "'": '&apos;',
+               '"': '&quot;'}
+    for i, c in enumerate(text):
+        text[i] = escapes.get(c, c)
+    return ''.join(text)
diff --git a/sleekxmpp/xmlstream/tostring/tostring26.py b/sleekxmpp/xmlstream/tostring/tostring26.py
new file mode 100644
index 0000000..0ee432c
--- /dev/null
+++ b/sleekxmpp/xmlstream/tostring/tostring26.py
@@ -0,0 +1,101 @@
+"""
+    SleekXMPP: The Sleek XMPP Library
+    Copyright (C) 2010  Nathanael C. Fritz
+    This file is part of SleekXMPP.
+
+    See the file LICENSE for copying permission.
+"""
+
+from __future__ import unicode_literals
+import types
+
+
+def tostring(xml=None, xmlns='', stanza_ns='', stream=None, outbuffer=''):
+    """
+    Serialize an XML object to a Unicode string.
+
+    If namespaces are provided using xmlns or stanza_ns, then elements
+    that use those namespaces will not include the xmlns attribute in
+    the output.
+
+    Arguments:
+        xml       -- The XML object to serialize. If the value is None,
+                     then the XML object contained in this stanza
+                     object will be used.
+        xmlns     -- Optional namespace of an element wrapping the XML
+                     object.
+        stanza_ns -- The namespace of the stanza object that contains
+                     the XML object.
+        stream    -- The XML stream that generated the XML object.
+        outbuffer -- Optional buffer for storing serializations during
+                     recursive calls.
+    """
+    # Add previous results to the start of the output.
+    output = [outbuffer]
+
+    # Extract the element's tag name.
+    tag_name = xml.tag.split('}', 1)[-1]
+
+    # Extract the element's namespace if it is defined.
+    if '}' in xml.tag:
+        tag_xmlns = xml.tag.split('}', 1)[0][1:]
+    else:
+        tag_xmlns = u''
+
+    # Output the tag name and derived namespace of the element.
+    namespace = u''
+    if tag_xmlns not in ['', xmlns, stanza_ns]:
+        namespace = u' xmlns="%s"' % tag_xmlns
+        if stream and tag_xmlns in stream.namespace_map:
+            mapped_namespace = stream.namespace_map[tag_xmlns]
+            if mapped_namespace:
+                tag_name = u"%s:%s" % (mapped_namespace, tag_name)
+    output.append(u"<%s" % tag_name)
+    output.append(namespace)
+
+    # Output escaped attribute values.
+    for attrib, value in xml.attrib.items():
+        if '{' not in attrib:
+            value = xml_escape(value)
+            output.append(u' %s="%s"' % (attrib, value))
+
+    if len(xml) or xml.text:
+        # If there are additional child elements to serialize.
+        output.append(u">")
+        if xml.text:
+            output.append(xml_escape(xml.text))
+        if len(xml):
+            for child in xml.getchildren():
+                output.append(tostring(child, tag_xmlns, stanza_ns, stream))
+        output.append(u"</%s>" % tag_name)
+    elif xml.text:
+        # If we only have text content.
+        output.append(u">%s</%s>" % (xml_escape(xml.text), tag_name))
+    else:
+        # Empty element.
+        output.append(u" />")
+    if xml.tail:
+        # If there is additional text after the element.
+        output.append(xml_escape(xml.tail))
+    return u''.join(output)
+
+
+def xml_escape(text):
+    """
+    Convert special characters in XML to escape sequences.
+
+    Arguments:
+        text -- The XML text to convert.
+    """
+    if type(text) != types.UnicodeType:
+        text = list(unicode(text, 'utf-8', 'ignore'))
+    else:
+        text = list(text)
+    escapes = {u'&': u'&amp;',
+               u'<': u'&lt;',
+               u'>': u'&gt;',
+               u"'": u'&apos;',
+               u'"': u'&quot;'}
+    for i, c in enumerate(text):
+        text[i] = escapes.get(c, c)
+    return u''.join(text)