def parse(xml, filename):
"""Parse the XML description of a VM image into a data structure. Returns
an object of class Image. BASE should be the directory where the disk
image files for this image can be found"""
class ErrorHandler:
def __init__(self):
self.msg = ""
def handler(self, ignore, s):
self.msg += s
error = ErrorHandler()
libxml2.registerErrorHandler(error.handler, None)
try:
try:
doc = libxml2.readMemory(xml, len(xml),
None, None,
libxml2.XML_PARSE_NOBLANKS)
except (libxml2.parserError, libxml2.treeError), e:
raise ParserException("%s\n%s" % (e, error.msg))
finally:
libxml2.registerErrorHandler(None, None)
try:
root = doc.getRootElement()
if root.name != "image":
raise ParserException(_("Root element is not 'image'"))
image = Image(root, filename=filename)
finally:
doc.freeDoc()
return image
def parse_node_helper(xml, root_name, callback, exec_class=ValueError):
"""
Parse the passed XML, expecting root as root_name, and pass the
root node to callback
"""
class ErrorHandler:
def __init__(self):
self.msg = ""
def handler(self, ignore, s):
self.msg += s
error = ErrorHandler()
libxml2.registerErrorHandler(error.handler, None)
try:
try:
doc = libxml2.readMemory(xml, len(xml),
None, None,
libxml2.XML_PARSE_NOBLANKS)
except (libxml2.parserError, libxml2.treeError), e:
raise exec_class("%s\n%s" % (e, error.msg))
finally:
libxml2.registerErrorHandler(None, None)
ret = None
try:
root = doc.getRootElement()
if root.name != root_name:
raise ValueError("Root element is not '%s'" % root_name)
ret = callback(root)
finally:
doc.freeDoc()
return ret
def parse_node_helper(xml, root_name, callback, exec_class=ValueError):
"""
Parse the passed XML, expecting root as root_name, and pass the
root node to callback
"""
class ErrorHandler:
def __init__(self):
self.msg = ""
def handler(self, ignore, s):
self.msg += s
error = ErrorHandler()
libxml2.registerErrorHandler(error.handler, None)
try:
try:
doc = libxml2.readMemory(xml, len(xml),
None, None,
libxml2.XML_PARSE_NOBLANKS)
except (libxml2.parserError, libxml2.treeError), e:
raise exec_class("%s\n%s" % (e, error.msg))
finally:
libxml2.registerErrorHandler(None, None)
ret = None
try:
root = doc.getRootElement()
if root.name != root_name:
raise ValueError("Root element is not '%s'" % root_name)
ret = callback(root)
finally:
doc.freeDoc()
return ret
def parse(xml, filename):
"""Parse the XML description of a VM image into a data structure. Returns
an object of class Image. BASE should be the directory where the disk
image files for this image can be found"""
class ErrorHandler:
def __init__(self):
self.msg = ""
def handler(self, ignore, s):
self.msg += s
error = ErrorHandler()
libxml2.registerErrorHandler(error.handler, None)
try:
try:
doc = libxml2.readMemory(xml, len(xml),
None, None,
libxml2.XML_PARSE_NOBLANKS)
except (libxml2.parserError, libxml2.treeError), e:
raise ParserException("%s\n%s" % (e, error.msg))
finally:
libxml2.registerErrorHandler(None, None)
try:
root = doc.getRootElement()
if root.name != "image":
raise ParserException(_("Root element is not 'image'"))
image = Image(root, filename=filename)
finally:
doc.freeDoc()
return image
def __init__ (self, db_file = None):
"""Create a UserDatabase object.
@db_file: an (optional) path which specifes the location
of the database file. If not specified, the default
location of /etc/desktop-profiles/users.xml is used.
"""
if db_file is None:
file = os.path.join (config.PROFILESDIR, "users.xml")
elif db_file[0] != '/':
file = os.path.join (config.PROFILESDIR, db_file)
else:
file = db_file
self.file = file;
self.modified = 0
dprint("New UserDatabase(%s) object\n" % self.file)
try:
self.doc = libxml2.readFile(file, None, libxml2.XML_PARSE_NOBLANKS)
# Process XInclude statements
self.doc.xincludeProcess()
except:
# TODO add fallback to last good database
dprint("failed to parse %s falling back to default conf\n" %
self.file)
self.doc = None
if self.doc == None:
self.doc = libxml2.readMemory(defaultConf, len(defaultConf),
None, None,
libxml2.XML_PARSE_NOBLANKS);
def apply_sheet_data(sheet, data):
doc = libxml2.readMemory(data,
len(data),
'',
'',
options=libxml2.XML_PARSE_NONET)
return _apply_sheet_doc(sheet, doc)
def __init__ (self, db_file = None):
"""Create a SystemDatabase object.
@db_file: a mandatory path which specifes the location
of the database file. If only a file is specified, the
directory /etc/sabayon is used.
"""
if db_file is None:
raise SystemDatabaseException(_("No database file provided"))
elif db_file[0] != '/':
file = os.path.join (config.CONFIGDIR, db_file)
else:
file = db_file
self.file = file
self.xmlquery = None
self.nodes = None # nodes from the XML file for LDAP usage.
self.modified = 0
dprint("New UserDatabase(%s) object\n" % self.file)
try:
self.doc = libxml2.readFile(file, None, libxml2.XML_PARSE_NOBLANKS)
# Process XInclude statements
self.doc.xincludeProcess()
except:
# TODO add fallback to last good database
dprint("failed to parse %s falling back to default conf\n" %
self.file)
self.doc = None
if self.doc == None:
self.doc = libxml2.readMemory(defaultConf, len(defaultConf),
None, None,
libxml2.XML_PARSE_NOBLANKS)
def _apply_sheet_doc(sheet, doc):
styledoc = libxml2.readMemory(sheet,
len(sheet),
'',
'',
options=libxml2.XML_PARSE_NONET)
style = libxslt.parseStylesheetDoc(styledoc)
result = style.applyStylesheet(doc, None)
res = ""
try:
res = style.saveResultToString(result)
except Exception as err:
# print("saveResultToString got exception: %s"%err)
pass
style.freeStylesheet()
doc.freeDoc()
result.freeDoc()
return res
def __read_metadata (self):
if not self.metadata is None:
return
if not os.path.exists (self.path):
dprint ("Profile file '%s' doesn't exist", self.path)
self.metadata = self.__create_empty_metadata_doc ()
self.needs_saving = True
return
dprint ("Reading metadata from '%s'", self.path)
try:
self.zip = zipfile.ZipFile (self.path, "r")
except:
raise ProfileStorageException (_("Failed to read file '%s': %s") %
(self.path, sys.exc_info()[1]))
try:
blob = self.zip.read ("metadata")
doc = libxml2.readMemory (blob, len (blob),
"metadata",
None,
libxml2.XML_PARSE_NOBLANKS)
except:
raise ProfileStorageException (_("Failed to read metadata from '%s': %s") %
(self.path, sys.exc_info()[1]))
root = doc.getRootElement ()
if not root or root.name != "metadata":
doc.freeDoc ()
raise ProfileStorageException (_("Invalid metadata section in '%s': %s") %
(self.path, sys.exc_info()[1]))
self.metadata = doc
if len (root.xpathEval ("directories")) == 0:
root.newChild (None, "directories", None)
if len (root.xpathEval ("files")) == 0:
root.newChild (None, "files", None)
