Added xml dependencies that should run on uPy. Start nextcloud code.

ElementTree.py

@@ -0,0 +1,132 @@
+# This file is part of the standard library of Pycopy project, minimalist
+# and lightweight Python implementation.
+#
+# https://github.com/pfalcon/pycopy
+# https://github.com/pfalcon/pycopy-lib
+#
+# The MIT License (MIT)
+#
+# Copyright (c) 2018-2020 Paul Sokolovsky
+#
+# Permission is hereby granted, free of charge, to any person obtaining a copy
+# of this software and associated documentation files (the "Software"), to deal
+# in the Software without restriction, including without limitation the rights
+# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+# copies of the Software, and to permit persons to whom the Software is
+# furnished to do so, subject to the following conditions:
+#
+# The above copyright notice and this permission notice shall be included in
+# all copies or substantial portions of the Software.
+#
+# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+# THE SOFTWARE.
+
+import io
+import xmltok2
+
+
+class ParseError(Exception):
+    pass
+
+
+class Element:
+
+    def __init__(self):
+        self.tag = None
+        self.attrib = {}
+        self.text = None
+        self.tail = None
+        self._children = []
+
+    def __getitem__(self, i):
+        return self._children[i]
+
+    def __len__(self):
+        return len(self._children)
+
+    def append(self, el):
+        self._children.append(el)
+
+    def get(self, key, default=None):
+        return self.attrib.get(key, default)
+
+    def set(self, key, value):
+        self.attrib[key] = value
+
+    def write(self, file):
+        assert self.tag is not None
+        file.write("<%s" % self.tag)
+        for k, v in self.attrib.items():
+            file.write(' {}="{}"'.format(k, v))
+        file.write(">")
+        if self.text is not None:
+            file.write(self.text)
+        for t in self._children:
+            t.write(file)
+        file.write("</%s>" % self.tag)
+        if self.tail is not None:
+            file.write(self.tail)
+
+
+class ElementTree:
+
+    def __init__(self, root):
+        self.root = root
+
+    def getroot(self):
+        return self.root
+
+    def write(self, file):
+        self.root.write(file)
+        file.write("\n")
+
+
+def parse_el(stream):
+    stack = []
+    root = None
+    last = None
+
+    for ev in xmltok2.tokenize(stream):
+        typ = ev[0]
+
+        if typ == xmltok2.START_TAG:
+            el = Element()
+            el.tag = ev[2]
+            if not stack:
+                root = el
+            else:
+                stack[-1]._children.append(el)
+            stack.append(el)
+            last = None
+
+        elif typ == xmltok2.ATTR:
+            # Ignore attrs of processing instructions
+            if stack:
+                stack[-1].attrib[ev[2]] = ev[3]
+
+        elif typ == xmltok2.TEXT:
+            if last is None:
+                stack[-1].text = ev[1]
+            else:
+                last.tail = ev[1]
+
+        elif typ == xmltok2.END_TAG:
+            if stack[-1].tag != ev[2]:
+                raise ParseError("mismatched tag: /%s (expected: /%s)" % (ev[1][1], stack[-1].tag))
+            last = stack.pop()
+
+    return root
+
+
+def parse(source):
+    return ElementTree(parse_el(source))
+
+
+def fromstring(data):
+    buf = io.StringIO(data)
+    return parse_el(buf)