| """plistlib.py -- a tool to generate and parse MacOSX .plist files. |
| |
| The PropertList (.plist) file format is a simple XML pickle supporting |
| basic object types, like dictionaries, lists, numbers and strings. |
| Usually the top level object is a dictionary. |
| |
| To write out a plist file, use the writePlist(rootObject, pathOrFile) |
| function. 'rootObject' is the top level object, 'pathOrFile' is a |
| filename or a (writable) file object. |
| |
| To parse a plist from a file, use the readPlist(pathOrFile) function, |
| with a file name or a (readable) file object as the only argument. It |
| returns the top level object (again, usually a dictionary). |
| |
| To work with plist data in bytes objects, you can use readPlistFromBytes() |
| and writePlistToBytes(). |
| |
| Values can be strings, integers, floats, booleans, tuples, lists, |
| dictionaries, Data or datetime.datetime objects. String values (including |
| dictionary keys) may be unicode strings -- they will be written out as |
| UTF-8. |
| |
| The <data> plist type is supported through the Data class. This is a |
| thin wrapper around a Python bytes object. |
| |
| Generate Plist example: |
| |
| pl = dict( |
| aString="Doodah", |
| aList=["A", "B", 12, 32.1, [1, 2, 3]], |
| aFloat = 0.1, |
| anInt = 728, |
| aDict=dict( |
| anotherString="<hello & hi there!>", |
| aUnicodeValue=u'M\xe4ssig, Ma\xdf', |
| aTrueValue=True, |
| aFalseValue=False, |
| ), |
| someData = Data(b"<binary gunk>"), |
| someMoreData = Data(b"<lots of binary gunk>" * 10), |
| aDate = datetime.datetime.fromtimestamp(time.mktime(time.gmtime())), |
| ) |
| # unicode keys are possible, but a little awkward to use: |
| pl[u'\xc5benraa'] = "That was a unicode key." |
| writePlist(pl, fileName) |
| |
| Parse Plist example: |
| |
| pl = readPlist(pathOrFile) |
| print pl["aKey"] |
| """ |
| |
| |
| __all__ = [ |
| "readPlist", "writePlist", "readPlistFromBytes", "writePlistToBytes", |
| "Plist", "Data", "Dict" |
| ] |
| # Note: the Plist and Dict classes have been deprecated. |
| |
| import binascii |
| import datetime |
| from io import BytesIO |
| import re |
| |
| |
| def readPlist(pathOrFile): |
| """Read a .plist file. 'pathOrFile' may either be a file name or a |
| (readable) file object. Return the unpacked root object (which |
| usually is a dictionary). |
| """ |
| didOpen = False |
| if isinstance(pathOrFile, str): |
| pathOrFile = open(pathOrFile, 'rb') |
| didOpen = True |
| p = PlistParser() |
| rootObject = p.parse(pathOrFile) |
| if didOpen: |
| pathOrFile.close() |
| return rootObject |
| |
| |
| def writePlist(rootObject, pathOrFile): |
| """Write 'rootObject' to a .plist file. 'pathOrFile' may either be a |
| file name or a (writable) file object. |
| """ |
| didOpen = False |
| if isinstance(pathOrFile, str): |
| pathOrFile = open(pathOrFile, 'wb') |
| didOpen = True |
| writer = PlistWriter(pathOrFile) |
| writer.writeln("<plist version=\"1.0\">") |
| writer.writeValue(rootObject) |
| writer.writeln("</plist>") |
| if didOpen: |
| pathOrFile.close() |
| |
| |
| def readPlistFromBytes(data): |
| """Read a plist data from a bytes object. Return the root object. |
| """ |
| return readPlist(BytesIO(data)) |
| |
| |
| def writePlistToBytes(rootObject): |
| """Return 'rootObject' as a plist-formatted bytes object. |
| """ |
| f = BytesIO() |
| writePlist(rootObject, f) |
| return f.getvalue() |
| |
| |
| class DumbXMLWriter: |
| def __init__(self, file, indentLevel=0, indent="\t"): |
| self.file = file |
| self.stack = [] |
| self.indentLevel = indentLevel |
| self.indent = indent |
| |
| def beginElement(self, element): |
| self.stack.append(element) |
| self.writeln("<%s>" % element) |
| self.indentLevel += 1 |
| |
| def endElement(self, element): |
| assert self.indentLevel > 0 |
| assert self.stack.pop() == element |
| self.indentLevel -= 1 |
| self.writeln("</%s>" % element) |
| |
| def simpleElement(self, element, value=None): |
| if value is not None: |
| value = _escape(value) |
| self.writeln("<%s>%s</%s>" % (element, value, element)) |
| else: |
| self.writeln("<%s/>" % element) |
| |
| def writeln(self, line): |
| if line: |
| # plist has fixed encoding of utf-8 |
| if isinstance(line, str): |
| line = line.encode('utf-8') |
| self.file.write(self.indentLevel * self.indent) |
| self.file.write(line) |
| self.file.write(b'\n') |
| |
| |
| # Contents should conform to a subset of ISO 8601 |
| # (in particular, YYYY '-' MM '-' DD 'T' HH ':' MM ':' SS 'Z'. Smaller units may be omitted with |
| # a loss of precision) |
| _dateParser = re.compile(r"(?P<year>\d\d\d\d)(?:-(?P<month>\d\d)(?:-(?P<day>\d\d)(?:T(?P<hour>\d\d)(?::(?P<minute>\d\d)(?::(?P<second>\d\d))?)?)?)?)?Z") |
| |
| def _dateFromString(s): |
| order = ('year', 'month', 'day', 'hour', 'minute', 'second') |
| gd = _dateParser.match(s).groupdict() |
| lst = [] |
| for key in order: |
| val = gd[key] |
| if val is None: |
| break |
| lst.append(int(val)) |
| return datetime.datetime(*lst) |
| |
| def _dateToString(d): |
| return '%04d-%02d-%02dT%02d:%02d:%02dZ' % ( |
| d.year, d.month, d.day, |
| d.hour, d.minute, d.second |
| ) |
| |
| |
| # Regex to find any control chars, except for \t \n and \r |
| _controlCharPat = re.compile( |
| r"[\x00\x01\x02\x03\x04\x05\x06\x07\x08\x0b\x0c\x0e\x0f" |
| r"\x10\x11\x12\x13\x14\x15\x16\x17\x18\x19\x1a\x1b\x1c\x1d\x1e\x1f]") |
| |
| def _escape(text): |
| m = _controlCharPat.search(text) |
| if m is not None: |
| raise ValueError("strings can't contains control characters; " |
| "use plistlib.Data instead") |
| text = text.replace("\r\n", "\n") # convert DOS line endings |
| text = text.replace("\r", "\n") # convert Mac line endings |
| text = text.replace("&", "&") # escape '&' |
| text = text.replace("<", "<") # escape '<' |
| text = text.replace(">", ">") # escape '>' |
| return text |
| |
| |
| PLISTHEADER = b"""\ |
| <?xml version="1.0" encoding="UTF-8"?> |
| <!DOCTYPE plist PUBLIC "-//Apple Computer//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd"> |
| """ |
| |
| class PlistWriter(DumbXMLWriter): |
| |
| def __init__(self, file, indentLevel=0, indent=b"\t", writeHeader=1): |
| if writeHeader: |
| file.write(PLISTHEADER) |
| DumbXMLWriter.__init__(self, file, indentLevel, indent) |
| |
| def writeValue(self, value): |
| if isinstance(value, str): |
| self.simpleElement("string", value) |
| elif isinstance(value, bool): |
| # must switch for bool before int, as bool is a |
| # subclass of int... |
| if value: |
| self.simpleElement("true") |
| else: |
| self.simpleElement("false") |
| elif isinstance(value, int): |
| self.simpleElement("integer", "%d" % value) |
| elif isinstance(value, float): |
| self.simpleElement("real", repr(value)) |
| elif isinstance(value, dict): |
| self.writeDict(value) |
| elif isinstance(value, Data): |
| self.writeData(value) |
| elif isinstance(value, datetime.datetime): |
| self.simpleElement("date", _dateToString(value)) |
| elif isinstance(value, (tuple, list)): |
| self.writeArray(value) |
| else: |
| raise TypeError("unsuported type: %s" % type(value)) |
| |
| def writeData(self, data): |
| self.beginElement("data") |
| self.indentLevel -= 1 |
| maxlinelength = 76 - len(self.indent.replace(b"\t", b" " * 8) * |
| self.indentLevel) |
| for line in data.asBase64(maxlinelength).split(b"\n"): |
| if line: |
| self.writeln(line) |
| self.indentLevel += 1 |
| self.endElement("data") |
| |
| def writeDict(self, d): |
| self.beginElement("dict") |
| items = sorted(d.items()) |
| for key, value in items: |
| if not isinstance(key, str): |
| raise TypeError("keys must be strings") |
| self.simpleElement("key", key) |
| self.writeValue(value) |
| self.endElement("dict") |
| |
| def writeArray(self, array): |
| self.beginElement("array") |
| for value in array: |
| self.writeValue(value) |
| self.endElement("array") |
| |
| |
| class _InternalDict(dict): |
| |
| # This class is needed while Dict is scheduled for deprecation: |
| # we only need to warn when a *user* instantiates Dict or when |
| # the "attribute notation for dict keys" is used. |
| |
| def __getattr__(self, attr): |
| try: |
| value = self[attr] |
| except KeyError: |
| raise AttributeError(attr) |
| from warnings import warn |
| warn("Attribute access from plist dicts is deprecated, use d[key] " |
| "notation instead", PendingDeprecationWarning) |
| return value |
| |
| def __setattr__(self, attr, value): |
| from warnings import warn |
| warn("Attribute access from plist dicts is deprecated, use d[key] " |
| "notation instead", PendingDeprecationWarning) |
| self[attr] = value |
| |
| def __delattr__(self, attr): |
| try: |
| del self[attr] |
| except KeyError: |
| raise AttributeError(attr) |
| from warnings import warn |
| warn("Attribute access from plist dicts is deprecated, use d[key] " |
| "notation instead", PendingDeprecationWarning) |
| |
| class Dict(_InternalDict): |
| |
| def __init__(self, **kwargs): |
| from warnings import warn |
| warn("The plistlib.Dict class is deprecated, use builtin dict instead", |
| PendingDeprecationWarning) |
| super().__init__(**kwargs) |
| |
| |
| class Plist(_InternalDict): |
| |
| """This class has been deprecated. Use readPlist() and writePlist() |
| functions instead, together with regular dict objects. |
| """ |
| |
| def __init__(self, **kwargs): |
| from warnings import warn |
| warn("The Plist class is deprecated, use the readPlist() and " |
| "writePlist() functions instead", PendingDeprecationWarning) |
| super().__init__(**kwargs) |
| |
| def fromFile(cls, pathOrFile): |
| """Deprecated. Use the readPlist() function instead.""" |
| rootObject = readPlist(pathOrFile) |
| plist = cls() |
| plist.update(rootObject) |
| return plist |
| fromFile = classmethod(fromFile) |
| |
| def write(self, pathOrFile): |
| """Deprecated. Use the writePlist() function instead.""" |
| writePlist(self, pathOrFile) |
| |
| |
| def _encodeBase64(s, maxlinelength=76): |
| # copied from base64.encodestring(), with added maxlinelength argument |
| maxbinsize = (maxlinelength//4)*3 |
| pieces = [] |
| for i in range(0, len(s), maxbinsize): |
| chunk = s[i : i + maxbinsize] |
| pieces.append(binascii.b2a_base64(chunk)) |
| return b''.join(pieces) |
| |
| class Data: |
| |
| """Wrapper for binary data.""" |
| |
| def __init__(self, data): |
| if not isinstance(data, bytes): |
| raise TypeError("data must be as bytes") |
| self.data = data |
| |
| @classmethod |
| def fromBase64(cls, data): |
| # base64.decodestring just calls binascii.a2b_base64; |
| # it seems overkill to use both base64 and binascii. |
| return cls(binascii.a2b_base64(data)) |
| |
| def asBase64(self, maxlinelength=76): |
| return _encodeBase64(self.data, maxlinelength) |
| |
| def __eq__(self, other): |
| if isinstance(other, self.__class__): |
| return self.data == other.data |
| elif isinstance(other, str): |
| return self.data == other |
| else: |
| return id(self) == id(other) |
| |
| def __repr__(self): |
| return "%s(%s)" % (self.__class__.__name__, repr(self.data)) |
| |
| |
| class PlistParser: |
| |
| def __init__(self): |
| self.stack = [] |
| self.currentKey = None |
| self.root = None |
| |
| def parse(self, fileobj): |
| from xml.parsers.expat import ParserCreate |
| parser = ParserCreate() |
| parser.StartElementHandler = self.handleBeginElement |
| parser.EndElementHandler = self.handleEndElement |
| parser.CharacterDataHandler = self.handleData |
| parser.ParseFile(fileobj) |
| return self.root |
| |
| def handleBeginElement(self, element, attrs): |
| self.data = [] |
| handler = getattr(self, "begin_" + element, None) |
| if handler is not None: |
| handler(attrs) |
| |
| def handleEndElement(self, element): |
| handler = getattr(self, "end_" + element, None) |
| if handler is not None: |
| handler() |
| |
| def handleData(self, data): |
| self.data.append(data) |
| |
| def addObject(self, value): |
| if self.currentKey is not None: |
| self.stack[-1][self.currentKey] = value |
| self.currentKey = None |
| elif not self.stack: |
| # this is the root object |
| self.root = value |
| else: |
| self.stack[-1].append(value) |
| |
| def getData(self): |
| data = ''.join(self.data) |
| self.data = [] |
| return data |
| |
| # element handlers |
| |
| def begin_dict(self, attrs): |
| d = _InternalDict() |
| self.addObject(d) |
| self.stack.append(d) |
| def end_dict(self): |
| self.stack.pop() |
| |
| def end_key(self): |
| self.currentKey = self.getData() |
| |
| def begin_array(self, attrs): |
| a = [] |
| self.addObject(a) |
| self.stack.append(a) |
| def end_array(self): |
| self.stack.pop() |
| |
| def end_true(self): |
| self.addObject(True) |
| def end_false(self): |
| self.addObject(False) |
| def end_integer(self): |
| self.addObject(int(self.getData())) |
| def end_real(self): |
| self.addObject(float(self.getData())) |
| def end_string(self): |
| self.addObject(self.getData()) |
| def end_data(self): |
| self.addObject(Data.fromBase64(self.getData().encode("utf-8"))) |
| def end_date(self): |
| self.addObject(_dateFromString(self.getData())) |