mirror of https://github.com/python/cpython
395 lines
12 KiB
Python
395 lines
12 KiB
Python
"""plistlib.py -- a tool to generate and parse MacOSX .plist files.
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The PropertList (.plist) file format is a simple XML pickle supporting
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basic object types, like dictionaries, lists, numbers and strings.
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Usually the top level object is a dictionary.
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To write out a plist file, use the writePlist(rootObject, pathOrFile)
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function. 'rootObject' is the top level object, 'pathOrFile' is a
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filename or a (writable) file object.
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To parse a plist from a file, use the readPlist(pathOrFile)
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function, with a file name or a (readable) file object as the only
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argument. It returns the top level object (usually a dictionary).
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Values can be strings, integers, floats, booleans, tuples, lists,
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dictionaries, Data or Date objects. String values (including dictionary
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keys) may be unicode strings -- they will be written out as UTF-8.
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This module exports a class named Dict(), which allows you to easily
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construct (nested) dicts using keyword arguments as well as accessing
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values with attribute notation, where d.foo is equivalent to d["foo"].
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Regular dictionaries work, too.
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The <data> plist type is supported through the Data class. This is a
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thin wrapper around a Python string.
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The <date> plist data has (limited) support through the Date class.
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(Warning: Dates are only supported if the PyXML package is installed.)
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Generate Plist example:
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pl = Dict(
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aString="Doodah",
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aList=["A", "B", 12, 32.1, [1, 2, 3]],
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aFloat = 0.1,
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anInt = 728,
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aDict=Dict(
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anotherString="<hello & hi there!>",
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aUnicodeValue=u'M\xe4ssig, Ma\xdf',
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aTrueValue=True,
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aFalseValue=False,
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),
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someData = Data("<binary gunk>"),
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someMoreData = Data("<lots of binary gunk>" * 10),
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aDate = Date(time.mktime(time.gmtime())),
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)
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# unicode keys are possible, but a little awkward to use:
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pl[u'\xc5benraa'] = "That was a unicode key."
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writePlist(pl, fileName)
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Parse Plist example:
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pl = readPlist(pathOrFile)
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print pl.aKey # same as pl["aKey"]
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"""
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__all__ = ["readPlist", "writePlist", "Plist", "Data", "Date", "Dict"]
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# Note: the Plist class has been deprecated.
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def readPlist(pathOrFile):
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"""Read a .plist file. 'pathOrFile' may either be a file name or a
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(readable) file object. Return the unpacked root object (which
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usually is a dictionary).
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"""
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didOpen = 0
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if isinstance(pathOrFile, (str, unicode)):
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pathOrFile = open(pathOrFile)
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didOpen = 1
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p = PlistParser()
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rootObject = p.parse(pathOrFile)
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if didOpen:
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pathOrFile.close()
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return rootObject
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def writePlist(rootObject, pathOrFile):
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"""Write 'rootObject' to a .plist file. 'pathOrFile' may either be a
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file name or a (writable) file object.
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"""
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didOpen = 0
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if isinstance(pathOrFile, (str, unicode)):
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pathOrFile = open(pathOrFile, "w")
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didOpen = 1
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writer = PlistWriter(pathOrFile)
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writer.writeln("<plist version=\"1.0\">")
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writer.writeValue(rootObject)
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writer.writeln("</plist>")
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if didOpen:
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pathOrFile.close()
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class DumbXMLWriter:
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def __init__(self, file, indentLevel=0, indent="\t"):
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self.file = file
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self.stack = []
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self.indentLevel = indentLevel
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self.indent = indent
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def beginElement(self, element):
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self.stack.append(element)
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self.writeln("<%s>" % element)
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self.indentLevel += 1
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def endElement(self, element):
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assert self.indentLevel > 0
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assert self.stack.pop() == element
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self.indentLevel -= 1
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self.writeln("</%s>" % element)
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def simpleElement(self, element, value=None):
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if value is not None:
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value = _escapeAndEncode(value)
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self.writeln("<%s>%s</%s>" % (element, value, element))
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else:
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self.writeln("<%s/>" % element)
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def writeln(self, line):
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if line:
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self.file.write(self.indentLevel * self.indent + line + "\n")
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else:
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self.file.write("\n")
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import re
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# Regex to strip all control chars, but for \t \n \r and \f
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_controlStripper = re.compile(r"[\x00\x01\x02\x03\x04\x05\x06\x07\x08\x0b\x0e\x0f"
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"\x10\x11\x12\x13\x14\x15\x16\x17\x18\x19\x1a\x1b\x1c\x1d\x1e\x1f]")
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def _escapeAndEncode(text):
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text = text.replace("\r\n", "\n") # convert DOS line endings
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text = text.replace("\r", "\n") # convert Mac line endings
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text = text.replace("&", "&") # escape '&'
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text = text.replace("<", "<") # escape '<'
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text = _controlStripper.sub("?", text) # replace control chars with '?'
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return text.encode("utf-8") # encode as UTF-8
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PLISTHEADER = """\
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<?xml version="1.0" encoding="UTF-8"?>
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<!DOCTYPE plist PUBLIC "-//Apple Computer//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
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"""
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class PlistWriter(DumbXMLWriter):
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def __init__(self, file, indentLevel=0, indent="\t", writeHeader=1):
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if writeHeader:
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file.write(PLISTHEADER)
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DumbXMLWriter.__init__(self, file, indentLevel, indent)
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def writeValue(self, value):
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if isinstance(value, (str, unicode)):
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self.simpleElement("string", value)
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elif isinstance(value, bool):
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# must switch for bool before int, as bool is a
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# subclass of int...
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if value:
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self.simpleElement("true")
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else:
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self.simpleElement("false")
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elif isinstance(value, int):
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self.simpleElement("integer", str(value))
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elif isinstance(value, float):
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# should perhaps use repr() for better precision?
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self.simpleElement("real", str(value))
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elif isinstance(value, dict):
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self.writeDict(value)
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elif isinstance(value, Data):
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self.writeData(value)
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elif isinstance(value, Date):
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self.simpleElement("date", value.toString())
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elif isinstance(value, (tuple, list)):
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self.writeArray(value)
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else:
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raise TypeError("unsuported type: %s" % type(value))
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def writeData(self, data):
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self.beginElement("data")
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for line in data.asBase64().split("\n"):
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if line:
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self.writeln(line)
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self.endElement("data")
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def writeDict(self, d):
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self.beginElement("dict")
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items = d.items()
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items.sort()
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for key, value in items:
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if not isinstance(key, (str, unicode)):
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raise TypeError("keys must be strings")
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self.simpleElement("key", key)
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self.writeValue(value)
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self.endElement("dict")
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def writeArray(self, array):
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self.beginElement("array")
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for value in array:
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self.writeValue(value)
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self.endElement("array")
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class Dict(dict):
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"""Convenience dictionary subclass: it allows dict construction using
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keyword arguments (just like dict() in 2.3) as well as attribute notation
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to retrieve values, making d.foo equivalent to d["foo"].
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"""
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def __new__(cls, **kwargs):
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self = dict.__new__(cls)
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self.update(kwargs)
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return self
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def __init__(self, **kwargs):
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self.update(kwargs)
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def __getattr__(self, attr):
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try:
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value = self[attr]
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except KeyError:
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raise AttributeError, attr
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return value
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def __setattr__(self, attr, value):
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self[attr] = value
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def __delattr__(self, attr):
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try:
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del self[attr]
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except KeyError:
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raise AttributeError, attr
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class Plist(Dict):
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"""This class has been deprecated! Use the Dict with readPlist() and
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writePlist() functions instead.
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"""
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def fromFile(cls, pathOrFile):
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"""Deprecated! Use the readPlist() function instead."""
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rootObject = readPlist(pathOrFile)
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plist = cls()
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plist.update(rootObject)
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return plist
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fromFile = classmethod(fromFile)
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def write(self, pathOrFile):
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"""Deprecated! Use the writePlist() function instead."""
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writePlist(self, pathOrFile)
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class Data:
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"""Wrapper for binary data."""
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def __init__(self, data):
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self.data = data
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def fromBase64(cls, data):
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import base64
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return cls(base64.decodestring(data))
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fromBase64 = classmethod(fromBase64)
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def asBase64(self):
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import base64
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return base64.encodestring(self.data)
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def __cmp__(self, other):
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if isinstance(other, self.__class__):
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return cmp(self.data, other.data)
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elif isinstance(other, str):
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return cmp(self.data, other)
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else:
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return cmp(id(self), id(other))
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def __repr__(self):
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return "%s(%s)" % (self.__class__.__name__, repr(self.data))
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class Date:
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"""Primitive date wrapper, uses time floats internally, is agnostic
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about time zones.
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"""
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def __init__(self, date):
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if isinstance(date, str):
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from xml.utils.iso8601 import parse
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date = parse(date)
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self.date = date
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def toString(self):
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from xml.utils.iso8601 import tostring
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return tostring(self.date)
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def __cmp__(self, other):
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if isinstance(other, self.__class__):
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return cmp(self.date, other.date)
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elif isinstance(other, (int, float)):
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return cmp(self.date, other)
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else:
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return cmp(id(self), id(other))
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def __repr__(self):
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return "%s(%s)" % (self.__class__.__name__, repr(self.toString()))
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class PlistParser:
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def __init__(self):
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self.stack = []
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self.currentKey = None
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self.root = None
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def parse(self, file):
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from xml.parsers.expat import ParserCreate
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parser = ParserCreate()
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parser.StartElementHandler = self.handleBeginElement
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parser.EndElementHandler = self.handleEndElement
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parser.CharacterDataHandler = self.handleData
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parser.ParseFile(file)
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return self.root
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def handleBeginElement(self, element, attrs):
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self.data = []
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handler = getattr(self, "begin_" + element, None)
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if handler is not None:
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handler(attrs)
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def handleEndElement(self, element):
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handler = getattr(self, "end_" + element, None)
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if handler is not None:
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handler()
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def handleData(self, data):
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self.data.append(data)
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def addObject(self, value):
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if self.currentKey is not None:
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self.stack[-1][self.currentKey] = value
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self.currentKey = None
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elif not self.stack:
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# this is the root object
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self.root = value
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else:
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self.stack[-1].append(value)
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def getData(self):
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data = "".join(self.data)
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try:
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data = data.encode("ascii")
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except UnicodeError:
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pass
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self.data = []
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return data
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# element handlers
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def begin_dict(self, attrs):
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d = Dict()
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self.addObject(d)
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self.stack.append(d)
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def end_dict(self):
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self.stack.pop()
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def end_key(self):
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self.currentKey = self.getData()
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def begin_array(self, attrs):
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a = []
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self.addObject(a)
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self.stack.append(a)
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def end_array(self):
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self.stack.pop()
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def end_true(self):
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self.addObject(True)
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def end_false(self):
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self.addObject(False)
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def end_integer(self):
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self.addObject(int(self.getData()))
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def end_real(self):
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self.addObject(float(self.getData()))
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def end_string(self):
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self.addObject(self.getData())
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def end_data(self):
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self.addObject(Data.fromBase64(self.getData()))
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def end_date(self):
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self.addObject(Date(self.getData()))
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