Autotest: Design and implement a system of managing RPM devices.
Created the rpm_control_system folder in site_utils. rpm_controller.py
will interact directly with our 2 different RPM device types.
The abstract class RPMController implements queueing different requests
as well as processing the requests serially.
The subclasses implement device specific code for interacting with the
different devices.
dli.py and BeautifulSoup.py are third party libraries that we will be
leaving here in order to make the RPM Integration System independent
from autotest.
BUG=chromium-os:30955
TEST=Simple Integration Tests in 'rpm_controller.py'. Along with
unittests to check successful/unsuccessful cases.
Change-Id: I6d570646b1e37b2a1a3eb96293768b177b92afd2
Reviewed-on: https://gerrit.chromium.org/gerrit/25433
Reviewed-by: Chris Sosa <sosa@chromium.org>
Commit-Ready: Simran Basi <sbasi@google.com>
Tested-by: Simran Basi <sbasi@google.com>
diff --git a/site_utils/rpm_control_system/BeautifulSoup.py b/site_utils/rpm_control_system/BeautifulSoup.py
new file mode 100644
index 0000000..7278215
--- /dev/null
+++ b/site_utils/rpm_control_system/BeautifulSoup.py
@@ -0,0 +1,2017 @@
+"""Beautiful Soup
+Elixir and Tonic
+"The Screen-Scraper's Friend"
+http://www.crummy.com/software/BeautifulSoup/
+
+Beautiful Soup parses a (possibly invalid) XML or HTML document into a
+tree representation. It provides methods and Pythonic idioms that make
+it easy to navigate, search, and modify the tree.
+
+A well-formed XML/HTML document yields a well-formed data
+structure. An ill-formed XML/HTML document yields a correspondingly
+ill-formed data structure. If your document is only locally
+well-formed, you can use this library to find and process the
+well-formed part of it.
+
+Beautiful Soup works with Python 2.2 and up. It has no external
+dependencies, but you'll have more success at converting data to UTF-8
+if you also install these three packages:
+
+* chardet, for auto-detecting character encodings
+ http://chardet.feedparser.org/
+* cjkcodecs and iconv_codec, which add more encodings to the ones supported
+ by stock Python.
+ http://cjkpython.i18n.org/
+
+Beautiful Soup defines classes for two main parsing strategies:
+
+ * BeautifulStoneSoup, for parsing XML, SGML, or your domain-specific
+ language that kind of looks like XML.
+
+ * BeautifulSoup, for parsing run-of-the-mill HTML code, be it valid
+ or invalid. This class has web browser-like heuristics for
+ obtaining a sensible parse tree in the face of common HTML errors.
+
+Beautiful Soup also defines a class (UnicodeDammit) for autodetecting
+the encoding of an HTML or XML document, and converting it to
+Unicode. Much of this code is taken from Mark Pilgrim's Universal Feed Parser.
+
+For more than you ever wanted to know about Beautiful Soup, see the
+documentation:
+http://www.crummy.com/software/BeautifulSoup/documentation.html
+
+Here, have some legalese:
+
+Copyright (c) 2004-2010, Leonard Richardson
+
+All rights reserved.
+
+Redistribution and use in source and binary forms, with or without
+modification, are permitted provided that the following conditions are
+met:
+
+ * Redistributions of source code must retain the above copyright
+ notice, this list of conditions and the following disclaimer.
+
+ * Redistributions in binary form must reproduce the above
+ copyright notice, this list of conditions and the following
+ disclaimer in the documentation and/or other materials provided
+ with the distribution.
+
+ * Neither the name of the the Beautiful Soup Consortium and All
+ Night Kosher Bakery nor the names of its contributors may be
+ used to endorse or promote products derived from this software
+ without specific prior written permission.
+
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
+CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
+PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
+LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
+NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE, DAMMIT.
+
+"""
+from __future__ import generators
+
+__author__ = "Leonard Richardson (leonardr@segfault.org)"
+__version__ = "3.2.1"
+__copyright__ = "Copyright (c) 2004-2012 Leonard Richardson"
+__license__ = "New-style BSD"
+
+from sgmllib import SGMLParser, SGMLParseError
+import codecs
+import markupbase
+import types
+import re
+import sgmllib
+try:
+ from htmlentitydefs import name2codepoint
+except ImportError:
+ name2codepoint = {}
+try:
+ set
+except NameError:
+ from sets import Set as set
+
+#These hacks make Beautiful Soup able to parse XML with namespaces
+sgmllib.tagfind = re.compile('[a-zA-Z][-_.:a-zA-Z0-9]*')
+markupbase._declname_match = re.compile(r'[a-zA-Z][-_.:a-zA-Z0-9]*\s*').match
+
+DEFAULT_OUTPUT_ENCODING = "utf-8"
+
+def _match_css_class(str):
+ """Build a RE to match the given CSS class."""
+ return re.compile(r"(^|.*\s)%s($|\s)" % str)
+
+# First, the classes that represent markup elements.
+
+class PageElement(object):
+ """Contains the navigational information for some part of the page
+ (either a tag or a piece of text)"""
+
+ def _invert(h):
+ "Cheap function to invert a hash."
+ i = {}
+ for k,v in h.items():
+ i[v] = k
+ return i
+
+ XML_ENTITIES_TO_SPECIAL_CHARS = { "apos" : "'",
+ "quot" : '"',
+ "amp" : "&",
+ "lt" : "<",
+ "gt" : ">" }
+
+ XML_SPECIAL_CHARS_TO_ENTITIES = _invert(XML_ENTITIES_TO_SPECIAL_CHARS)
+
+ def setup(self, parent=None, previous=None):
+ """Sets up the initial relations between this element and
+ other elements."""
+ self.parent = parent
+ self.previous = previous
+ self.next = None
+ self.previousSibling = None
+ self.nextSibling = None
+ if self.parent and self.parent.contents:
+ self.previousSibling = self.parent.contents[-1]
+ self.previousSibling.nextSibling = self
+
+ def replaceWith(self, replaceWith):
+ oldParent = self.parent
+ myIndex = self.parent.index(self)
+ if hasattr(replaceWith, "parent")\
+ and replaceWith.parent is self.parent:
+ # We're replacing this element with one of its siblings.
+ index = replaceWith.parent.index(replaceWith)
+ if index and index < myIndex:
+ # Furthermore, it comes before this element. That
+ # means that when we extract it, the index of this
+ # element will change.
+ myIndex = myIndex - 1
+ self.extract()
+ oldParent.insert(myIndex, replaceWith)
+
+ def replaceWithChildren(self):
+ myParent = self.parent
+ myIndex = self.parent.index(self)
+ self.extract()
+ reversedChildren = list(self.contents)
+ reversedChildren.reverse()
+ for child in reversedChildren:
+ myParent.insert(myIndex, child)
+
+ def extract(self):
+ """Destructively rips this element out of the tree."""
+ if self.parent:
+ try:
+ del self.parent.contents[self.parent.index(self)]
+ except ValueError:
+ pass
+
+ #Find the two elements that would be next to each other if
+ #this element (and any children) hadn't been parsed. Connect
+ #the two.
+ lastChild = self._lastRecursiveChild()
+ nextElement = lastChild.next
+
+ if self.previous:
+ self.previous.next = nextElement
+ if nextElement:
+ nextElement.previous = self.previous
+ self.previous = None
+ lastChild.next = None
+
+ self.parent = None
+ if self.previousSibling:
+ self.previousSibling.nextSibling = self.nextSibling
+ if self.nextSibling:
+ self.nextSibling.previousSibling = self.previousSibling
+ self.previousSibling = self.nextSibling = None
+ return self
+
+ def _lastRecursiveChild(self):
+ "Finds the last element beneath this object to be parsed."
+ lastChild = self
+ while hasattr(lastChild, 'contents') and lastChild.contents:
+ lastChild = lastChild.contents[-1]
+ return lastChild
+
+ def insert(self, position, newChild):
+ if isinstance(newChild, basestring) \
+ and not isinstance(newChild, NavigableString):
+ newChild = NavigableString(newChild)
+
+ position = min(position, len(self.contents))
+ if hasattr(newChild, 'parent') and newChild.parent is not None:
+ # We're 'inserting' an element that's already one
+ # of this object's children.
+ if newChild.parent is self:
+ index = self.index(newChild)
+ if index > position:
+ # Furthermore we're moving it further down the
+ # list of this object's children. That means that
+ # when we extract this element, our target index
+ # will jump down one.
+ position = position - 1
+ newChild.extract()
+
+ newChild.parent = self
+ previousChild = None
+ if position == 0:
+ newChild.previousSibling = None
+ newChild.previous = self
+ else:
+ previousChild = self.contents[position-1]
+ newChild.previousSibling = previousChild
+ newChild.previousSibling.nextSibling = newChild
+ newChild.previous = previousChild._lastRecursiveChild()
+ if newChild.previous:
+ newChild.previous.next = newChild
+
+ newChildsLastElement = newChild._lastRecursiveChild()
+
+ if position >= len(self.contents):
+ newChild.nextSibling = None
+
+ parent = self
+ parentsNextSibling = None
+ while not parentsNextSibling:
+ parentsNextSibling = parent.nextSibling
+ parent = parent.parent
+ if not parent: # This is the last element in the document.
+ break
+ if parentsNextSibling:
+ newChildsLastElement.next = parentsNextSibling
+ else:
+ newChildsLastElement.next = None
+ else:
+ nextChild = self.contents[position]
+ newChild.nextSibling = nextChild
+ if newChild.nextSibling:
+ newChild.nextSibling.previousSibling = newChild
+ newChildsLastElement.next = nextChild
+
+ if newChildsLastElement.next:
+ newChildsLastElement.next.previous = newChildsLastElement
+ self.contents.insert(position, newChild)
+
+ def append(self, tag):
+ """Appends the given tag to the contents of this tag."""
+ self.insert(len(self.contents), tag)
+
+ def findNext(self, name=None, attrs={}, text=None, **kwargs):
+ """Returns the first item that matches the given criteria and
+ appears after this Tag in the document."""
+ return self._findOne(self.findAllNext, name, attrs, text, **kwargs)
+
+ def findAllNext(self, name=None, attrs={}, text=None, limit=None,
+ **kwargs):
+ """Returns all items that match the given criteria and appear
+ after this Tag in the document."""
+ return self._findAll(name, attrs, text, limit, self.nextGenerator,
+ **kwargs)
+
+ def findNextSibling(self, name=None, attrs={}, text=None, **kwargs):
+ """Returns the closest sibling to this Tag that matches the
+ given criteria and appears after this Tag in the document."""
+ return self._findOne(self.findNextSiblings, name, attrs, text,
+ **kwargs)
+
+ def findNextSiblings(self, name=None, attrs={}, text=None, limit=None,
+ **kwargs):
+ """Returns the siblings of this Tag that match the given
+ criteria and appear after this Tag in the document."""
+ return self._findAll(name, attrs, text, limit,
+ self.nextSiblingGenerator, **kwargs)
+ fetchNextSiblings = findNextSiblings # Compatibility with pre-3.x
+
+ def findPrevious(self, name=None, attrs={}, text=None, **kwargs):
+ """Returns the first item that matches the given criteria and
+ appears before this Tag in the document."""
+ return self._findOne(self.findAllPrevious, name, attrs, text, **kwargs)
+
+ def findAllPrevious(self, name=None, attrs={}, text=None, limit=None,
+ **kwargs):
+ """Returns all items that match the given criteria and appear
+ before this Tag in the document."""
+ return self._findAll(name, attrs, text, limit, self.previousGenerator,
+ **kwargs)
+ fetchPrevious = findAllPrevious # Compatibility with pre-3.x
+
+ def findPreviousSibling(self, name=None, attrs={}, text=None, **kwargs):
+ """Returns the closest sibling to this Tag that matches the
+ given criteria and appears before this Tag in the document."""
+ return self._findOne(self.findPreviousSiblings, name, attrs, text,
+ **kwargs)
+
+ def findPreviousSiblings(self, name=None, attrs={}, text=None,
+ limit=None, **kwargs):
+ """Returns the siblings of this Tag that match the given
+ criteria and appear before this Tag in the document."""
+ return self._findAll(name, attrs, text, limit,
+ self.previousSiblingGenerator, **kwargs)
+ fetchPreviousSiblings = findPreviousSiblings # Compatibility with pre-3.x
+
+ def findParent(self, name=None, attrs={}, **kwargs):
+ """Returns the closest parent of this Tag that matches the given
+ criteria."""
+ # NOTE: We can't use _findOne because findParents takes a different
+ # set of arguments.
+ r = None
+ l = self.findParents(name, attrs, 1)
+ if l:
+ r = l[0]
+ return r
+
+ def findParents(self, name=None, attrs={}, limit=None, **kwargs):
+ """Returns the parents of this Tag that match the given
+ criteria."""
+
+ return self._findAll(name, attrs, None, limit, self.parentGenerator,
+ **kwargs)
+ fetchParents = findParents # Compatibility with pre-3.x
+
+ #These methods do the real heavy lifting.
+
+ def _findOne(self, method, name, attrs, text, **kwargs):
+ r = None
+ l = method(name, attrs, text, 1, **kwargs)
+ if l:
+ r = l[0]
+ return r
+
+ def _findAll(self, name, attrs, text, limit, generator, **kwargs):
+ "Iterates over a generator looking for things that match."
+
+ if isinstance(name, SoupStrainer):
+ strainer = name
+ # (Possibly) special case some findAll*(...) searches
+ elif text is None and not limit and not attrs and not kwargs:
+ # findAll*(True)
+ if name is True:
+ return [element for element in generator()
+ if isinstance(element, Tag)]
+ # findAll*('tag-name')
+ elif isinstance(name, basestring):
+ return [element for element in generator()
+ if isinstance(element, Tag) and
+ element.name == name]
+ else:
+ strainer = SoupStrainer(name, attrs, text, **kwargs)
+ # Build a SoupStrainer
+ else:
+ strainer = SoupStrainer(name, attrs, text, **kwargs)
+ results = ResultSet(strainer)
+ g = generator()
+ while True:
+ try:
+ i = g.next()
+ except StopIteration:
+ break
+ if i:
+ found = strainer.search(i)
+ if found:
+ results.append(found)
+ if limit and len(results) >= limit:
+ break
+ return results
+
+ #These Generators can be used to navigate starting from both
+ #NavigableStrings and Tags.
+ def nextGenerator(self):
+ i = self
+ while i is not None:
+ i = i.next
+ yield i
+
+ def nextSiblingGenerator(self):
+ i = self
+ while i is not None:
+ i = i.nextSibling
+ yield i
+
+ def previousGenerator(self):
+ i = self
+ while i is not None:
+ i = i.previous
+ yield i
+
+ def previousSiblingGenerator(self):
+ i = self
+ while i is not None:
+ i = i.previousSibling
+ yield i
+
+ def parentGenerator(self):
+ i = self
+ while i is not None:
+ i = i.parent
+ yield i
+
+ # Utility methods
+ def substituteEncoding(self, str, encoding=None):
+ encoding = encoding or "utf-8"
+ return str.replace("%SOUP-ENCODING%", encoding)
+
+ def toEncoding(self, s, encoding=None):
+ """Encodes an object to a string in some encoding, or to Unicode.
+ ."""
+ if isinstance(s, unicode):
+ if encoding:
+ s = s.encode(encoding)
+ elif isinstance(s, str):
+ if encoding:
+ s = s.encode(encoding)
+ else:
+ s = unicode(s)
+ else:
+ if encoding:
+ s = self.toEncoding(str(s), encoding)
+ else:
+ s = unicode(s)
+ return s
+
+ BARE_AMPERSAND_OR_BRACKET = re.compile("([<>]|"
+ + "&(?!#\d+;|#x[0-9a-fA-F]+;|\w+;)"
+ + ")")
+
+ def _sub_entity(self, x):
+ """Used with a regular expression to substitute the
+ appropriate XML entity for an XML special character."""
+ return "&" + self.XML_SPECIAL_CHARS_TO_ENTITIES[x.group(0)[0]] + ";"
+
+
+class NavigableString(unicode, PageElement):
+
+ def __new__(cls, value):
+ """Create a new NavigableString.
+
+ When unpickling a NavigableString, this method is called with
+ the string in DEFAULT_OUTPUT_ENCODING. That encoding needs to be
+ passed in to the superclass's __new__ or the superclass won't know
+ how to handle non-ASCII characters.
+ """
+ if isinstance(value, unicode):
+ return unicode.__new__(cls, value)
+ return unicode.__new__(cls, value, DEFAULT_OUTPUT_ENCODING)
+
+ def __getnewargs__(self):
+ return (NavigableString.__str__(self),)
+
+ def __getattr__(self, attr):
+ """text.string gives you text. This is for backwards
+ compatibility for Navigable*String, but for CData* it lets you
+ get the string without the CData wrapper."""
+ if attr == 'string':
+ return self
+ else:
+ raise AttributeError, "'%s' object has no attribute '%s'" % (self.__class__.__name__, attr)
+
+ def __unicode__(self):
+ return str(self).decode(DEFAULT_OUTPUT_ENCODING)
+
+ def __str__(self, encoding=DEFAULT_OUTPUT_ENCODING):
+ # Substitute outgoing XML entities.
+ data = self.BARE_AMPERSAND_OR_BRACKET.sub(self._sub_entity, self)
+ if encoding:
+ return data.encode(encoding)
+ else:
+ return data
+
+class CData(NavigableString):
+
+ def __str__(self, encoding=DEFAULT_OUTPUT_ENCODING):
+ return "<![CDATA[%s]]>" % NavigableString.__str__(self, encoding)
+
+class ProcessingInstruction(NavigableString):
+ def __str__(self, encoding=DEFAULT_OUTPUT_ENCODING):
+ output = self
+ if "%SOUP-ENCODING%" in output:
+ output = self.substituteEncoding(output, encoding)
+ return "<?%s?>" % self.toEncoding(output, encoding)
+
+class Comment(NavigableString):
+ def __str__(self, encoding=DEFAULT_OUTPUT_ENCODING):
+ return "<!--%s-->" % NavigableString.__str__(self, encoding)
+
+class Declaration(NavigableString):
+ def __str__(self, encoding=DEFAULT_OUTPUT_ENCODING):
+ return "<!%s>" % NavigableString.__str__(self, encoding)
+
+class Tag(PageElement):
+
+ """Represents a found HTML tag with its attributes and contents."""
+
+ def _convertEntities(self, match):
+ """Used in a call to re.sub to replace HTML, XML, and numeric
+ entities with the appropriate Unicode characters. If HTML
+ entities are being converted, any unrecognized entities are
+ escaped."""
+ x = match.group(1)
+ if self.convertHTMLEntities and x in name2codepoint:
+ return unichr(name2codepoint[x])
+ elif x in self.XML_ENTITIES_TO_SPECIAL_CHARS:
+ if self.convertXMLEntities:
+ return self.XML_ENTITIES_TO_SPECIAL_CHARS[x]
+ else:
+ return u'&%s;' % x
+ elif len(x) > 0 and x[0] == '#':
+ # Handle numeric entities
+ if len(x) > 1 and x[1] == 'x':
+ return unichr(int(x[2:], 16))
+ else:
+ return unichr(int(x[1:]))
+
+ elif self.escapeUnrecognizedEntities:
+ return u'&%s;' % x
+ else:
+ return u'&%s;' % x
+
+ def __init__(self, parser, name, attrs=None, parent=None,
+ previous=None):
+ "Basic constructor."
+
+ # We don't actually store the parser object: that lets extracted
+ # chunks be garbage-collected
+ self.parserClass = parser.__class__
+ self.isSelfClosing = parser.isSelfClosingTag(name)
+ self.name = name
+ if attrs is None:
+ attrs = []
+ elif isinstance(attrs, dict):
+ attrs = attrs.items()
+ self.attrs = attrs
+ self.contents = []
+ self.setup(parent, previous)
+ self.hidden = False
+ self.containsSubstitutions = False
+ self.convertHTMLEntities = parser.convertHTMLEntities
+ self.convertXMLEntities = parser.convertXMLEntities
+ self.escapeUnrecognizedEntities = parser.escapeUnrecognizedEntities
+
+ # Convert any HTML, XML, or numeric entities in the attribute values.
+ convert = lambda(k, val): (k,
+ re.sub("&(#\d+|#x[0-9a-fA-F]+|\w+);",
+ self._convertEntities,
+ val))
+ self.attrs = map(convert, self.attrs)
+
+ def getString(self):
+ if (len(self.contents) == 1
+ and isinstance(self.contents[0], NavigableString)):
+ return self.contents[0]
+
+ def setString(self, string):
+ """Replace the contents of the tag with a string"""
+ self.clear()
+ self.append(string)
+
+ string = property(getString, setString)
+
+ def getText(self, separator=u""):
+ if not len(self.contents):
+ return u""
+ stopNode = self._lastRecursiveChild().next
+ strings = []
+ current = self.contents[0]
+ while current is not stopNode:
+ if isinstance(current, NavigableString):
+ strings.append(current.strip())
+ current = current.next
+ return separator.join(strings)
+
+ text = property(getText)
+
+ def get(self, key, default=None):
+ """Returns the value of the 'key' attribute for the tag, or
+ the value given for 'default' if it doesn't have that
+ attribute."""
+ return self._getAttrMap().get(key, default)
+
+ def clear(self):
+ """Extract all children."""
+ for child in self.contents[:]:
+ child.extract()
+
+ def index(self, element):
+ for i, child in enumerate(self.contents):
+ if child is element:
+ return i
+ raise ValueError("Tag.index: element not in tag")
+
+ def has_key(self, key):
+ return self._getAttrMap().has_key(key)
+
+ def __getitem__(self, key):
+ """tag[key] returns the value of the 'key' attribute for the tag,
+ and throws an exception if it's not there."""
+ return self._getAttrMap()[key]
+
+ def __iter__(self):
+ "Iterating over a tag iterates over its contents."
+ return iter(self.contents)
+
+ def __len__(self):
+ "The length of a tag is the length of its list of contents."
+ return len(self.contents)
+
+ def __contains__(self, x):
+ return x in self.contents
+
+ def __nonzero__(self):
+ "A tag is non-None even if it has no contents."
+ return True
+
+ def __setitem__(self, key, value):
+ """Setting tag[key] sets the value of the 'key' attribute for the
+ tag."""
+ self._getAttrMap()
+ self.attrMap[key] = value
+ found = False
+ for i in range(0, len(self.attrs)):
+ if self.attrs[i][0] == key:
+ self.attrs[i] = (key, value)
+ found = True
+ if not found:
+ self.attrs.append((key, value))
+ self._getAttrMap()[key] = value
+
+ def __delitem__(self, key):
+ "Deleting tag[key] deletes all 'key' attributes for the tag."
+ for item in self.attrs:
+ if item[0] == key:
+ self.attrs.remove(item)
+ #We don't break because bad HTML can define the same
+ #attribute multiple times.
+ self._getAttrMap()
+ if self.attrMap.has_key(key):
+ del self.attrMap[key]
+
+ def __call__(self, *args, **kwargs):
+ """Calling a tag like a function is the same as calling its
+ findAll() method. Eg. tag('a') returns a list of all the A tags
+ found within this tag."""
+ return apply(self.findAll, args, kwargs)
+
+ def __getattr__(self, tag):
+ #print "Getattr %s.%s" % (self.__class__, tag)
+ if len(tag) > 3 and tag.rfind('Tag') == len(tag)-3:
+ return self.find(tag[:-3])
+ elif tag.find('__') != 0:
+ return self.find(tag)
+ raise AttributeError, "'%s' object has no attribute '%s'" % (self.__class__, tag)
+
+ def __eq__(self, other):
+ """Returns true iff this tag has the same name, the same attributes,
+ and the same contents (recursively) as the given tag.
+
+ NOTE: right now this will return false if two tags have the
+ same attributes in a different order. Should this be fixed?"""
+ if other is self:
+ return True
+ if not hasattr(other, 'name') or not hasattr(other, 'attrs') or not hasattr(other, 'contents') or self.name != other.name or self.attrs != other.attrs or len(self) != len(other):
+ return False
+ for i in range(0, len(self.contents)):
+ if self.contents[i] != other.contents[i]:
+ return False
+ return True
+
+ def __ne__(self, other):
+ """Returns true iff this tag is not identical to the other tag,
+ as defined in __eq__."""
+ return not self == other
+
+ def __repr__(self, encoding=DEFAULT_OUTPUT_ENCODING):
+ """Renders this tag as a string."""
+ return self.__str__(encoding)
+
+ def __unicode__(self):
+ return self.__str__(None)
+
+ def __str__(self, encoding=DEFAULT_OUTPUT_ENCODING,
+ prettyPrint=False, indentLevel=0):
+ """Returns a string or Unicode representation of this tag and
+ its contents. To get Unicode, pass None for encoding.
+
+ NOTE: since Python's HTML parser consumes whitespace, this
+ method is not certain to reproduce the whitespace present in
+ the original string."""
+
+ encodedName = self.toEncoding(self.name, encoding)
+
+ attrs = []
+ if self.attrs:
+ for key, val in self.attrs:
+ fmt = '%s="%s"'
+ if isinstance(val, basestring):
+ if self.containsSubstitutions and '%SOUP-ENCODING%' in val:
+ val = self.substituteEncoding(val, encoding)
+
+ # The attribute value either:
+ #
+ # * Contains no embedded double quotes or single quotes.
+ # No problem: we enclose it in double quotes.
+ # * Contains embedded single quotes. No problem:
+ # double quotes work here too.
+ # * Contains embedded double quotes. No problem:
+ # we enclose it in single quotes.
+ # * Embeds both single _and_ double quotes. This
+ # can't happen naturally, but it can happen if
+ # you modify an attribute value after parsing
+ # the document. Now we have a bit of a
+ # problem. We solve it by enclosing the
+ # attribute in single quotes, and escaping any
+ # embedded single quotes to XML entities.
+ if '"' in val:
+ fmt = "%s='%s'"
+ if "'" in val:
+ # TODO: replace with apos when
+ # appropriate.
+ val = val.replace("'", "&squot;")
+
+ # Now we're okay w/r/t quotes. But the attribute
+ # value might also contain angle brackets, or
+ # ampersands that aren't part of entities. We need
+ # to escape those to XML entities too.
+ val = self.BARE_AMPERSAND_OR_BRACKET.sub(self._sub_entity, val)
+
+ attrs.append(fmt % (self.toEncoding(key, encoding),
+ self.toEncoding(val, encoding)))
+ close = ''
+ closeTag = ''
+ if self.isSelfClosing:
+ close = ' /'
+ else:
+ closeTag = '</%s>' % encodedName
+
+ indentTag, indentContents = 0, 0
+ if prettyPrint:
+ indentTag = indentLevel
+ space = (' ' * (indentTag-1))
+ indentContents = indentTag + 1
+ contents = self.renderContents(encoding, prettyPrint, indentContents)
+ if self.hidden:
+ s = contents
+ else:
+ s = []
+ attributeString = ''
+ if attrs:
+ attributeString = ' ' + ' '.join(attrs)
+ if prettyPrint:
+ s.append(space)
+ s.append('<%s%s%s>' % (encodedName, attributeString, close))
+ if prettyPrint:
+ s.append("\n")
+ s.append(contents)
+ if prettyPrint and contents and contents[-1] != "\n":
+ s.append("\n")
+ if prettyPrint and closeTag:
+ s.append(space)
+ s.append(closeTag)
+ if prettyPrint and closeTag and self.nextSibling:
+ s.append("\n")
+ s = ''.join(s)
+ return s
+
+ def decompose(self):
+ """Recursively destroys the contents of this tree."""
+ self.extract()
+ if len(self.contents) == 0:
+ return
+ current = self.contents[0]
+ while current is not None:
+ next = current.next
+ if isinstance(current, Tag):
+ del current.contents[:]
+ current.parent = None
+ current.previous = None
+ current.previousSibling = None
+ current.next = None
+ current.nextSibling = None
+ current = next
+
+ def prettify(self, encoding=DEFAULT_OUTPUT_ENCODING):
+ return self.__str__(encoding, True)
+
+ def renderContents(self, encoding=DEFAULT_OUTPUT_ENCODING,
+ prettyPrint=False, indentLevel=0):
+ """Renders the contents of this tag as a string in the given
+ encoding. If encoding is None, returns a Unicode string.."""
+ s=[]
+ for c in self:
+ text = None
+ if isinstance(c, NavigableString):
+ text = c.__str__(encoding)
+ elif isinstance(c, Tag):
+ s.append(c.__str__(encoding, prettyPrint, indentLevel))
+ if text and prettyPrint:
+ text = text.strip()
+ if text:
+ if prettyPrint:
+ s.append(" " * (indentLevel-1))
+ s.append(text)
+ if prettyPrint:
+ s.append("\n")
+ return ''.join(s)
+
+ #Soup methods
+
+ def find(self, name=None, attrs={}, recursive=True, text=None,
+ **kwargs):
+ """Return only the first child of this Tag matching the given
+ criteria."""
+ r = None
+ l = self.findAll(name, attrs, recursive, text, 1, **kwargs)
+ if l:
+ r = l[0]
+ return r
+ findChild = find
+
+ def findAll(self, name=None, attrs={}, recursive=True, text=None,
+ limit=None, **kwargs):
+ """Extracts a list of Tag objects that match the given
+ criteria. You can specify the name of the Tag and any
+ attributes you want the Tag to have.
+
+ The value of a key-value pair in the 'attrs' map can be a
+ string, a list of strings, a regular expression object, or a
+ callable that takes a string and returns whether or not the
+ string matches for some custom definition of 'matches'. The
+ same is true of the tag name."""
+ generator = self.recursiveChildGenerator
+ if not recursive:
+ generator = self.childGenerator
+ return self._findAll(name, attrs, text, limit, generator, **kwargs)
+ findChildren = findAll
+
+ # Pre-3.x compatibility methods
+ first = find
+ fetch = findAll
+
+ def fetchText(self, text=None, recursive=True, limit=None):
+ return self.findAll(text=text, recursive=recursive, limit=limit)
+
+ def firstText(self, text=None, recursive=True):
+ return self.find(text=text, recursive=recursive)
+
+ #Private methods
+
+ def _getAttrMap(self):
+ """Initializes a map representation of this tag's attributes,
+ if not already initialized."""
+ if not getattr(self, 'attrMap'):
+ self.attrMap = {}
+ for (key, value) in self.attrs:
+ self.attrMap[key] = value
+ return self.attrMap
+
+ #Generator methods
+ def childGenerator(self):
+ # Just use the iterator from the contents
+ return iter(self.contents)
+
+ def recursiveChildGenerator(self):
+ if not len(self.contents):
+ raise StopIteration
+ stopNode = self._lastRecursiveChild().next
+ current = self.contents[0]
+ while current is not stopNode:
+ yield current
+ current = current.next
+
+
+# Next, a couple classes to represent queries and their results.
+class SoupStrainer:
+ """Encapsulates a number of ways of matching a markup element (tag or
+ text)."""
+
+ def __init__(self, name=None, attrs={}, text=None, **kwargs):
+ self.name = name
+ if isinstance(attrs, basestring):
+ kwargs['class'] = _match_css_class(attrs)
+ attrs = None
+ if kwargs:
+ if attrs:
+ attrs = attrs.copy()
+ attrs.update(kwargs)
+ else:
+ attrs = kwargs
+ self.attrs = attrs
+ self.text = text
+
+ def __str__(self):
+ if self.text:
+ return self.text
+ else:
+ return "%s|%s" % (self.name, self.attrs)
+
+ def searchTag(self, markupName=None, markupAttrs={}):
+ found = None
+ markup = None
+ if isinstance(markupName, Tag):
+ markup = markupName
+ markupAttrs = markup
+ callFunctionWithTagData = callable(self.name) \
+ and not isinstance(markupName, Tag)
+
+ if (not self.name) \
+ or callFunctionWithTagData \
+ or (markup and self._matches(markup, self.name)) \
+ or (not markup and self._matches(markupName, self.name)):
+ if callFunctionWithTagData:
+ match = self.name(markupName, markupAttrs)
+ else:
+ match = True
+ markupAttrMap = None
+ for attr, matchAgainst in self.attrs.items():
+ if not markupAttrMap:
+ if hasattr(markupAttrs, 'get'):
+ markupAttrMap = markupAttrs
+ else:
+ markupAttrMap = {}
+ for k,v in markupAttrs:
+ markupAttrMap[k] = v
+ attrValue = markupAttrMap.get(attr)
+ if not self._matches(attrValue, matchAgainst):
+ match = False
+ break
+ if match:
+ if markup:
+ found = markup
+ else:
+ found = markupName
+ return found
+
+ def search(self, markup):
+ #print 'looking for %s in %s' % (self, markup)
+ found = None
+ # If given a list of items, scan it for a text element that
+ # matches.
+ if hasattr(markup, "__iter__") \
+ and not isinstance(markup, Tag):
+ for element in markup:
+ if isinstance(element, NavigableString) \
+ and self.search(element):
+ found = element
+ break
+ # If it's a Tag, make sure its name or attributes match.
+ # Don't bother with Tags if we're searching for text.
+ elif isinstance(markup, Tag):
+ if not self.text:
+ found = self.searchTag(markup)
+ # If it's text, make sure the text matches.
+ elif isinstance(markup, NavigableString) or \
+ isinstance(markup, basestring):
+ if self._matches(markup, self.text):
+ found = markup
+ else:
+ raise Exception, "I don't know how to match against a %s" \
+ % markup.__class__
+ return found
+
+ def _matches(self, markup, matchAgainst):
+ #print "Matching %s against %s" % (markup, matchAgainst)
+ result = False
+ if matchAgainst is True:
+ result = markup is not None
+ elif callable(matchAgainst):
+ result = matchAgainst(markup)
+ else:
+ #Custom match methods take the tag as an argument, but all
+ #other ways of matching match the tag name as a string.
+ if isinstance(markup, Tag):
+ markup = markup.name
+ if markup and not isinstance(markup, basestring):
+ markup = unicode(markup)
+ #Now we know that chunk is either a string, or None.
+ if hasattr(matchAgainst, 'match'):
+ # It's a regexp object.
+ result = markup and matchAgainst.search(markup)
+ elif hasattr(matchAgainst, '__iter__'): # list-like
+ result = markup in matchAgainst
+ elif hasattr(matchAgainst, 'items'):
+ result = markup.has_key(matchAgainst)
+ elif matchAgainst and isinstance(markup, basestring):
+ if isinstance(markup, unicode):
+ matchAgainst = unicode(matchAgainst)
+ else:
+ matchAgainst = str(matchAgainst)
+
+ if not result:
+ result = matchAgainst == markup
+ return result
+
+class ResultSet(list):
+ """A ResultSet is just a list that keeps track of the SoupStrainer
+ that created it."""
+ def __init__(self, source):
+ list.__init__([])
+ self.source = source
+
+# Now, some helper functions.
+
+def buildTagMap(default, *args):
+ """Turns a list of maps, lists, or scalars into a single map.
+ Used to build the SELF_CLOSING_TAGS, NESTABLE_TAGS, and
+ NESTING_RESET_TAGS maps out of lists and partial maps."""
+ built = {}
+ for portion in args:
+ if hasattr(portion, 'items'):
+ #It's a map. Merge it.
+ for k,v in portion.items():
+ built[k] = v
+ elif hasattr(portion, '__iter__'): # is a list
+ #It's a list. Map each item to the default.
+ for k in portion:
+ built[k] = default
+ else:
+ #It's a scalar. Map it to the default.
+ built[portion] = default
+ return built
+
+# Now, the parser classes.
+
+class BeautifulStoneSoup(Tag, SGMLParser):
+
+ """This class contains the basic parser and search code. It defines
+ a parser that knows nothing about tag behavior except for the
+ following:
+
+ You can't close a tag without closing all the tags it encloses.
+ That is, "<foo><bar></foo>" actually means
+ "<foo><bar></bar></foo>".
+
+ [Another possible explanation is "<foo><bar /></foo>", but since
+ this class defines no SELF_CLOSING_TAGS, it will never use that
+ explanation.]
+
+ This class is useful for parsing XML or made-up markup languages,
+ or when BeautifulSoup makes an assumption counter to what you were
+ expecting."""
+
+ SELF_CLOSING_TAGS = {}
+ NESTABLE_TAGS = {}
+ RESET_NESTING_TAGS = {}
+ QUOTE_TAGS = {}
+ PRESERVE_WHITESPACE_TAGS = []
+
+ MARKUP_MASSAGE = [(re.compile('(<[^<>]*)/>'),
+ lambda x: x.group(1) + ' />'),
+ (re.compile('<!\s+([^<>]*)>'),
+ lambda x: '<!' + x.group(1) + '>')
+ ]
+
+ ROOT_TAG_NAME = u'[document]'
+
+ HTML_ENTITIES = "html"
+ XML_ENTITIES = "xml"
+ XHTML_ENTITIES = "xhtml"
+ # TODO: This only exists for backwards-compatibility
+ ALL_ENTITIES = XHTML_ENTITIES
+
+ # Used when determining whether a text node is all whitespace and
+ # can be replaced with a single space. A text node that contains
+ # fancy Unicode spaces (usually non-breaking) should be left
+ # alone.
+ STRIP_ASCII_SPACES = { 9: None, 10: None, 12: None, 13: None, 32: None, }
+
+ def __init__(self, markup="", parseOnlyThese=None, fromEncoding=None,
+ markupMassage=True, smartQuotesTo=XML_ENTITIES,
+ convertEntities=None, selfClosingTags=None, isHTML=False):
+ """The Soup object is initialized as the 'root tag', and the
+ provided markup (which can be a string or a file-like object)
+ is fed into the underlying parser.
+
+ sgmllib will process most bad HTML, and the BeautifulSoup
+ class has some tricks for dealing with some HTML that kills
+ sgmllib, but Beautiful Soup can nonetheless choke or lose data
+ if your data uses self-closing tags or declarations
+ incorrectly.
+
+ By default, Beautiful Soup uses regexes to sanitize input,
+ avoiding the vast majority of these problems. If the problems
+ don't apply to you, pass in False for markupMassage, and
+ you'll get better performance.
+
+ The default parser massage techniques fix the two most common
+ instances of invalid HTML that choke sgmllib:
+
+ <br/> (No space between name of closing tag and tag close)
+ <! --Comment--> (Extraneous whitespace in declaration)
+
+ You can pass in a custom list of (RE object, replace method)
+ tuples to get Beautiful Soup to scrub your input the way you
+ want."""
+
+ self.parseOnlyThese = parseOnlyThese
+ self.fromEncoding = fromEncoding
+ self.smartQuotesTo = smartQuotesTo
+ self.convertEntities = convertEntities
+ # Set the rules for how we'll deal with the entities we
+ # encounter
+ if self.convertEntities:
+ # It doesn't make sense to convert encoded characters to
+ # entities even while you're converting entities to Unicode.
+ # Just convert it all to Unicode.
+ self.smartQuotesTo = None
+ if convertEntities == self.HTML_ENTITIES:
+ self.convertXMLEntities = False
+ self.convertHTMLEntities = True
+ self.escapeUnrecognizedEntities = True
+ elif convertEntities == self.XHTML_ENTITIES:
+ self.convertXMLEntities = True
+ self.convertHTMLEntities = True
+ self.escapeUnrecognizedEntities = False
+ elif convertEntities == self.XML_ENTITIES:
+ self.convertXMLEntities = True
+ self.convertHTMLEntities = False
+ self.escapeUnrecognizedEntities = False
+ else:
+ self.convertXMLEntities = False
+ self.convertHTMLEntities = False
+ self.escapeUnrecognizedEntities = False
+
+ self.instanceSelfClosingTags = buildTagMap(None, selfClosingTags)
+ SGMLParser.__init__(self)
+
+ if hasattr(markup, 'read'): # It's a file-type object.
+ markup = markup.read()
+ self.markup = markup
+ self.markupMassage = markupMassage
+ try:
+ self._feed(isHTML=isHTML)
+ except StopParsing:
+ pass
+ self.markup = None # The markup can now be GCed
+
+ def convert_charref(self, name):
+ """This method fixes a bug in Python's SGMLParser."""
+ try:
+ n = int(name)
+ except ValueError:
+ return
+ if not 0 <= n <= 127 : # ASCII ends at 127, not 255
+ return
+ return self.convert_codepoint(n)
+
+ def _feed(self, inDocumentEncoding=None, isHTML=False):
+ # Convert the document to Unicode.
+ markup = self.markup
+ if isinstance(markup, unicode):
+ if not hasattr(self, 'originalEncoding'):
+ self.originalEncoding = None
+ else:
+ dammit = UnicodeDammit\
+ (markup, [self.fromEncoding, inDocumentEncoding],
+ smartQuotesTo=self.smartQuotesTo, isHTML=isHTML)
+ markup = dammit.unicode
+ self.originalEncoding = dammit.originalEncoding
+ self.declaredHTMLEncoding = dammit.declaredHTMLEncoding
+ if markup:
+ if self.markupMassage:
+ if not hasattr(self.markupMassage, "__iter__"):
+ self.markupMassage = self.MARKUP_MASSAGE
+ for fix, m in self.markupMassage:
+ markup = fix.sub(m, markup)
+ # TODO: We get rid of markupMassage so that the
+ # soup object can be deepcopied later on. Some
+ # Python installations can't copy regexes. If anyone
+ # was relying on the existence of markupMassage, this
+ # might cause problems.
+ del(self.markupMassage)
+ self.reset()
+
+ SGMLParser.feed(self, markup)
+ # Close out any unfinished strings and close all the open tags.
+ self.endData()
+ while self.currentTag.name != self.ROOT_TAG_NAME:
+ self.popTag()
+
+ def __getattr__(self, methodName):
+ """This method routes method call requests to either the SGMLParser
+ superclass or the Tag superclass, depending on the method name."""
+ #print "__getattr__ called on %s.%s" % (self.__class__, methodName)
+
+ if methodName.startswith('start_') or methodName.startswith('end_') \
+ or methodName.startswith('do_'):
+ return SGMLParser.__getattr__(self, methodName)
+ elif not methodName.startswith('__'):
+ return Tag.__getattr__(self, methodName)
+ else:
+ raise AttributeError
+
+ def isSelfClosingTag(self, name):
+ """Returns true iff the given string is the name of a
+ self-closing tag according to this parser."""
+ return self.SELF_CLOSING_TAGS.has_key(name) \
+ or self.instanceSelfClosingTags.has_key(name)
+
+ def reset(self):
+ Tag.__init__(self, self, self.ROOT_TAG_NAME)
+ self.hidden = 1
+ SGMLParser.reset(self)
+ self.currentData = []
+ self.currentTag = None
+ self.tagStack = []
+ self.quoteStack = []
+ self.pushTag(self)
+
+ def popTag(self):
+ tag = self.tagStack.pop()
+
+ #print "Pop", tag.name
+ if self.tagStack:
+ self.currentTag = self.tagStack[-1]
+ return self.currentTag
+
+ def pushTag(self, tag):
+ #print "Push", tag.name
+ if self.currentTag:
+ self.currentTag.contents.append(tag)
+ self.tagStack.append(tag)
+ self.currentTag = self.tagStack[-1]
+
+ def endData(self, containerClass=NavigableString):
+ if self.currentData:
+ currentData = u''.join(self.currentData)
+ if (currentData.translate(self.STRIP_ASCII_SPACES) == '' and
+ not set([tag.name for tag in self.tagStack]).intersection(
+ self.PRESERVE_WHITESPACE_TAGS)):
+ if '\n' in currentData:
+ currentData = '\n'
+ else:
+ currentData = ' '
+ self.currentData = []
+ if self.parseOnlyThese and len(self.tagStack) <= 1 and \
+ (not self.parseOnlyThese.text or \
+ not self.parseOnlyThese.search(currentData)):
+ return
+ o = containerClass(currentData)
+ o.setup(self.currentTag, self.previous)
+ if self.previous:
+ self.previous.next = o
+ self.previous = o
+ self.currentTag.contents.append(o)
+
+
+ def _popToTag(self, name, inclusivePop=True):
+ """Pops the tag stack up to and including the most recent
+ instance of the given tag. If inclusivePop is false, pops the tag
+ stack up to but *not* including the most recent instqance of
+ the given tag."""
+ #print "Popping to %s" % name
+ if name == self.ROOT_TAG_NAME:
+ return
+
+ numPops = 0
+ mostRecentTag = None
+ for i in range(len(self.tagStack)-1, 0, -1):
+ if name == self.tagStack[i].name:
+ numPops = len(self.tagStack)-i
+ break
+ if not inclusivePop:
+ numPops = numPops - 1
+
+ for i in range(0, numPops):
+ mostRecentTag = self.popTag()
+ return mostRecentTag
+
+ def _smartPop(self, name):
+
+ """We need to pop up to the previous tag of this type, unless
+ one of this tag's nesting reset triggers comes between this
+ tag and the previous tag of this type, OR unless this tag is a
+ generic nesting trigger and another generic nesting trigger
+ comes between this tag and the previous tag of this type.
+
+ Examples:
+ <p>Foo<b>Bar *<p>* should pop to 'p', not 'b'.
+ <p>Foo<table>Bar *<p>* should pop to 'table', not 'p'.
+ <p>Foo<table><tr>Bar *<p>* should pop to 'tr', not 'p'.
+
+ <li><ul><li> *<li>* should pop to 'ul', not the first 'li'.
+ <tr><table><tr> *<tr>* should pop to 'table', not the first 'tr'
+ <td><tr><td> *<td>* should pop to 'tr', not the first 'td'
+ """
+
+ nestingResetTriggers = self.NESTABLE_TAGS.get(name)
+ isNestable = nestingResetTriggers != None
+ isResetNesting = self.RESET_NESTING_TAGS.has_key(name)
+ popTo = None
+ inclusive = True
+ for i in range(len(self.tagStack)-1, 0, -1):
+ p = self.tagStack[i]
+ if (not p or p.name == name) and not isNestable:
+ #Non-nestable tags get popped to the top or to their
+ #last occurance.
+ popTo = name
+ break
+ if (nestingResetTriggers is not None
+ and p.name in nestingResetTriggers) \
+ or (nestingResetTriggers is None and isResetNesting
+ and self.RESET_NESTING_TAGS.has_key(p.name)):
+
+ #If we encounter one of the nesting reset triggers
+ #peculiar to this tag, or we encounter another tag
+ #that causes nesting to reset, pop up to but not
+ #including that tag.
+ popTo = p.name
+ inclusive = False
+ break
+ p = p.parent
+ if popTo:
+ self._popToTag(popTo, inclusive)
+
+ def unknown_starttag(self, name, attrs, selfClosing=0):
+ #print "Start tag %s: %s" % (name, attrs)
+ if self.quoteStack:
+ #This is not a real tag.
+ #print "<%s> is not real!" % name
+ attrs = ''.join([' %s="%s"' % (x, y) for x, y in attrs])
+ self.handle_data('<%s%s>' % (name, attrs))
+ return
+ self.endData()
+
+ if not self.isSelfClosingTag(name) and not selfClosing:
+ self._smartPop(name)
+
+ if self.parseOnlyThese and len(self.tagStack) <= 1 \
+ and (self.parseOnlyThese.text or not self.parseOnlyThese.searchTag(name, attrs)):
+ return
+
+ tag = Tag(self, name, attrs, self.currentTag, self.previous)
+ if self.previous:
+ self.previous.next = tag
+ self.previous = tag
+ self.pushTag(tag)
+ if selfClosing or self.isSelfClosingTag(name):
+ self.popTag()
+ if name in self.QUOTE_TAGS:
+ #print "Beginning quote (%s)" % name
+ self.quoteStack.append(name)
+ self.literal = 1
+ return tag
+
+ def unknown_endtag(self, name):
+ #print "End tag %s" % name
+ if self.quoteStack and self.quoteStack[-1] != name:
+ #This is not a real end tag.
+ #print "</%s> is not real!" % name
+ self.handle_data('</%s>' % name)
+ return
+ self.endData()
+ self._popToTag(name)
+ if self.quoteStack and self.quoteStack[-1] == name:
+ self.quoteStack.pop()
+ self.literal = (len(self.quoteStack) > 0)
+
+ def handle_data(self, data):
+ self.currentData.append(data)
+
+ def _toStringSubclass(self, text, subclass):
+ """Adds a certain piece of text to the tree as a NavigableString
+ subclass."""
+ self.endData()
+ self.handle_data(text)
+ self.endData(subclass)
+
+ def handle_pi(self, text):
+ """Handle a processing instruction as a ProcessingInstruction
+ object, possibly one with a %SOUP-ENCODING% slot into which an
+ encoding will be plugged later."""
+ if text[:3] == "xml":
+ text = u"xml version='1.0' encoding='%SOUP-ENCODING%'"
+ self._toStringSubclass(text, ProcessingInstruction)
+
+ def handle_comment(self, text):
+ "Handle comments as Comment objects."
+ self._toStringSubclass(text, Comment)
+
+ def handle_charref(self, ref):
+ "Handle character references as data."
+ if self.convertEntities:
+ data = unichr(int(ref))
+ else:
+ data = '&#%s;' % ref
+ self.handle_data(data)
+
+ def handle_entityref(self, ref):
+ """Handle entity references as data, possibly converting known
+ HTML and/or XML entity references to the corresponding Unicode
+ characters."""
+ data = None
+ if self.convertHTMLEntities:
+ try:
+ data = unichr(name2codepoint[ref])
+ except KeyError:
+ pass
+
+ if not data and self.convertXMLEntities:
+ data = self.XML_ENTITIES_TO_SPECIAL_CHARS.get(ref)
+
+ if not data and self.convertHTMLEntities and \
+ not self.XML_ENTITIES_TO_SPECIAL_CHARS.get(ref):
+ # TODO: We've got a problem here. We're told this is
+ # an entity reference, but it's not an XML entity
+ # reference or an HTML entity reference. Nonetheless,
+ # the logical thing to do is to pass it through as an
+ # unrecognized entity reference.
+ #
+ # Except: when the input is "&carol;" this function
+ # will be called with input "carol". When the input is
+ # "AT&T", this function will be called with input
+ # "T". We have no way of knowing whether a semicolon
+ # was present originally, so we don't know whether
+ # this is an unknown entity or just a misplaced
+ # ampersand.
+ #
+ # The more common case is a misplaced ampersand, so I
+ # escape the ampersand and omit the trailing semicolon.
+ data = "&%s" % ref
+ if not data:
+ # This case is different from the one above, because we
+ # haven't already gone through a supposedly comprehensive
+ # mapping of entities to Unicode characters. We might not
+ # have gone through any mapping at all. So the chances are
+ # very high that this is a real entity, and not a
+ # misplaced ampersand.
+ data = "&%s;" % ref
+ self.handle_data(data)
+
+ def handle_decl(self, data):
+ "Handle DOCTYPEs and the like as Declaration objects."
+ self._toStringSubclass(data, Declaration)
+
+ def parse_declaration(self, i):
+ """Treat a bogus SGML declaration as raw data. Treat a CDATA
+ declaration as a CData object."""
+ j = None
+ if self.rawdata[i:i+9] == '<![CDATA[':
+ k = self.rawdata.find(']]>', i)
+ if k == -1:
+ k = len(self.rawdata)
+ data = self.rawdata[i+9:k]
+ j = k+3
+ self._toStringSubclass(data, CData)
+ else:
+ try:
+ j = SGMLParser.parse_declaration(self, i)
+ except SGMLParseError:
+ toHandle = self.rawdata[i:]
+ self.handle_data(toHandle)
+ j = i + len(toHandle)
+ return j
+
+class BeautifulSoup(BeautifulStoneSoup):
+
+ """This parser knows the following facts about HTML:
+
+ * Some tags have no closing tag and should be interpreted as being
+ closed as soon as they are encountered.
+
+ * The text inside some tags (ie. 'script') may contain tags which
+ are not really part of the document and which should be parsed
+ as text, not tags. If you want to parse the text as tags, you can
+ always fetch it and parse it explicitly.
+
+ * Tag nesting rules:
+
+ Most tags can't be nested at all. For instance, the occurance of
+ a <p> tag should implicitly close the previous <p> tag.
+
+ <p>Para1<p>Para2
+ should be transformed into:
+ <p>Para1</p><p>Para2
+
+ Some tags can be nested arbitrarily. For instance, the occurance
+ of a <blockquote> tag should _not_ implicitly close the previous
+ <blockquote> tag.
+
+ Alice said: <blockquote>Bob said: <blockquote>Blah
+ should NOT be transformed into:
+ Alice said: <blockquote>Bob said: </blockquote><blockquote>Blah
+
+ Some tags can be nested, but the nesting is reset by the
+ interposition of other tags. For instance, a <tr> tag should
+ implicitly close the previous <tr> tag within the same <table>,
+ but not close a <tr> tag in another table.
+
+ <table><tr>Blah<tr>Blah
+ should be transformed into:
+ <table><tr>Blah</tr><tr>Blah
+ but,
+ <tr>Blah<table><tr>Blah
+ should NOT be transformed into
+ <tr>Blah<table></tr><tr>Blah
+
+ Differing assumptions about tag nesting rules are a major source
+ of problems with the BeautifulSoup class. If BeautifulSoup is not
+ treating as nestable a tag your page author treats as nestable,
+ try ICantBelieveItsBeautifulSoup, MinimalSoup, or
+ BeautifulStoneSoup before writing your own subclass."""
+
+ def __init__(self, *args, **kwargs):
+ if not kwargs.has_key('smartQuotesTo'):
+ kwargs['smartQuotesTo'] = self.HTML_ENTITIES
+ kwargs['isHTML'] = True
+ BeautifulStoneSoup.__init__(self, *args, **kwargs)
+
+ SELF_CLOSING_TAGS = buildTagMap(None,
+ ('br' , 'hr', 'input', 'img', 'meta',
+ 'spacer', 'link', 'frame', 'base', 'col'))
+
+ PRESERVE_WHITESPACE_TAGS = set(['pre', 'textarea'])
+
+ QUOTE_TAGS = {'script' : None, 'textarea' : None}
+
+ #According to the HTML standard, each of these inline tags can
+ #contain another tag of the same type. Furthermore, it's common
+ #to actually use these tags this way.
+ NESTABLE_INLINE_TAGS = ('span', 'font', 'q', 'object', 'bdo', 'sub', 'sup',
+ 'center')
+
+ #According to the HTML standard, these block tags can contain
+ #another tag of the same type. Furthermore, it's common
+ #to actually use these tags this way.
+ NESTABLE_BLOCK_TAGS = ('blockquote', 'div', 'fieldset', 'ins', 'del')
+
+ #Lists can contain other lists, but there are restrictions.
+ NESTABLE_LIST_TAGS = { 'ol' : [],
+ 'ul' : [],
+ 'li' : ['ul', 'ol'],
+ 'dl' : [],
+ 'dd' : ['dl'],
+ 'dt' : ['dl'] }
+
+ #Tables can contain other tables, but there are restrictions.
+ NESTABLE_TABLE_TAGS = {'table' : [],
+ 'tr' : ['table', 'tbody', 'tfoot', 'thead'],
+ 'td' : ['tr'],
+ 'th' : ['tr'],
+ 'thead' : ['table'],
+ 'tbody' : ['table'],
+ 'tfoot' : ['table'],
+ }
+
+ NON_NESTABLE_BLOCK_TAGS = ('address', 'form', 'p', 'pre')
+
+ #If one of these tags is encountered, all tags up to the next tag of
+ #this type are popped.
+ RESET_NESTING_TAGS = buildTagMap(None, NESTABLE_BLOCK_TAGS, 'noscript',
+ NON_NESTABLE_BLOCK_TAGS,
+ NESTABLE_LIST_TAGS,
+ NESTABLE_TABLE_TAGS)
+
+ NESTABLE_TAGS = buildTagMap([], NESTABLE_INLINE_TAGS, NESTABLE_BLOCK_TAGS,
+ NESTABLE_LIST_TAGS, NESTABLE_TABLE_TAGS)
+
+ # Used to detect the charset in a META tag; see start_meta
+ CHARSET_RE = re.compile("((^|;)\s*charset=)([^;]*)", re.M)
+
+ def start_meta(self, attrs):
+ """Beautiful Soup can detect a charset included in a META tag,
+ try to convert the document to that charset, and re-parse the
+ document from the beginning."""
+ httpEquiv = None
+ contentType = None
+ contentTypeIndex = None
+ tagNeedsEncodingSubstitution = False
+
+ for i in range(0, len(attrs)):
+ key, value = attrs[i]
+ key = key.lower()
+ if key == 'http-equiv':
+ httpEquiv = value
+ elif key == 'content':
+ contentType = value
+ contentTypeIndex = i
+
+ if httpEquiv and contentType: # It's an interesting meta tag.
+ match = self.CHARSET_RE.search(contentType)
+ if match:
+ if (self.declaredHTMLEncoding is not None or
+ self.originalEncoding == self.fromEncoding):
+ # An HTML encoding was sniffed while converting
+ # the document to Unicode, or an HTML encoding was
+ # sniffed during a previous pass through the
+ # document, or an encoding was specified
+ # explicitly and it worked. Rewrite the meta tag.
+ def rewrite(match):
+ return match.group(1) + "%SOUP-ENCODING%"
+ newAttr = self.CHARSET_RE.sub(rewrite, contentType)
+ attrs[contentTypeIndex] = (attrs[contentTypeIndex][0],
+ newAttr)
+ tagNeedsEncodingSubstitution = True
+ else:
+ # This is our first pass through the document.
+ # Go through it again with the encoding information.
+ newCharset = match.group(3)
+ if newCharset and newCharset != self.originalEncoding:
+ self.declaredHTMLEncoding = newCharset
+ self._feed(self.declaredHTMLEncoding)
+ raise StopParsing
+ pass
+ tag = self.unknown_starttag("meta", attrs)
+ if tag and tagNeedsEncodingSubstitution:
+ tag.containsSubstitutions = True
+
+class StopParsing(Exception):
+ pass
+
+class ICantBelieveItsBeautifulSoup(BeautifulSoup):
+
+ """The BeautifulSoup class is oriented towards skipping over
+ common HTML errors like unclosed tags. However, sometimes it makes
+ errors of its own. For instance, consider this fragment:
+
+ <b>Foo<b>Bar</b></b>
+
+ This is perfectly valid (if bizarre) HTML. However, the
+ BeautifulSoup class will implicitly close the first b tag when it
+ encounters the second 'b'. It will think the author wrote
+ "<b>Foo<b>Bar", and didn't close the first 'b' tag, because
+ there's no real-world reason to bold something that's already
+ bold. When it encounters '</b></b>' it will close two more 'b'
+ tags, for a grand total of three tags closed instead of two. This
+ can throw off the rest of your document structure. The same is
+ true of a number of other tags, listed below.
+
+ It's much more common for someone to forget to close a 'b' tag
+ than to actually use nested 'b' tags, and the BeautifulSoup class
+ handles the common case. This class handles the not-co-common
+ case: where you can't believe someone wrote what they did, but
+ it's valid HTML and BeautifulSoup screwed up by assuming it
+ wouldn't be."""
+
+ I_CANT_BELIEVE_THEYRE_NESTABLE_INLINE_TAGS = \
+ ('em', 'big', 'i', 'small', 'tt', 'abbr', 'acronym', 'strong',
+ 'cite', 'code', 'dfn', 'kbd', 'samp', 'strong', 'var', 'b',
+ 'big')
+
+ I_CANT_BELIEVE_THEYRE_NESTABLE_BLOCK_TAGS = ('noscript',)
+
+ NESTABLE_TAGS = buildTagMap([], BeautifulSoup.NESTABLE_TAGS,
+ I_CANT_BELIEVE_THEYRE_NESTABLE_BLOCK_TAGS,
+ I_CANT_BELIEVE_THEYRE_NESTABLE_INLINE_TAGS)
+
+class MinimalSoup(BeautifulSoup):
+ """The MinimalSoup class is for parsing HTML that contains
+ pathologically bad markup. It makes no assumptions about tag
+ nesting, but it does know which tags are self-closing, that
+ <script> tags contain Javascript and should not be parsed, that
+ META tags may contain encoding information, and so on.
+
+ This also makes it better for subclassing than BeautifulStoneSoup
+ or BeautifulSoup."""
+
+ RESET_NESTING_TAGS = buildTagMap('noscript')
+ NESTABLE_TAGS = {}
+
+class BeautifulSOAP(BeautifulStoneSoup):
+ """This class will push a tag with only a single string child into
+ the tag's parent as an attribute. The attribute's name is the tag
+ name, and the value is the string child. An example should give
+ the flavor of the change:
+
+ <foo><bar>baz</bar></foo>
+ =>
+ <foo bar="baz"><bar>baz</bar></foo>
+
+ You can then access fooTag['bar'] instead of fooTag.barTag.string.
+
+ This is, of course, useful for scraping structures that tend to
+ use subelements instead of attributes, such as SOAP messages. Note
+ that it modifies its input, so don't print the modified version
+ out.
+
+ I'm not sure how many people really want to use this class; let me
+ know if you do. Mainly I like the name."""
+
+ def popTag(self):
+ if len(self.tagStack) > 1:
+ tag = self.tagStack[-1]
+ parent = self.tagStack[-2]
+ parent._getAttrMap()
+ if (isinstance(tag, Tag) and len(tag.contents) == 1 and
+ isinstance(tag.contents[0], NavigableString) and
+ not parent.attrMap.has_key(tag.name)):
+ parent[tag.name] = tag.contents[0]
+ BeautifulStoneSoup.popTag(self)
+
+#Enterprise class names! It has come to our attention that some people
+#think the names of the Beautiful Soup parser classes are too silly
+#and "unprofessional" for use in enterprise screen-scraping. We feel
+#your pain! For such-minded folk, the Beautiful Soup Consortium And
+#All-Night Kosher Bakery recommends renaming this file to
+#"RobustParser.py" (or, in cases of extreme enterprisiness,
+#"RobustParserBeanInterface.class") and using the following
+#enterprise-friendly class aliases:
+class RobustXMLParser(BeautifulStoneSoup):
+ pass
+class RobustHTMLParser(BeautifulSoup):
+ pass
+class RobustWackAssHTMLParser(ICantBelieveItsBeautifulSoup):
+ pass
+class RobustInsanelyWackAssHTMLParser(MinimalSoup):
+ pass
+class SimplifyingSOAPParser(BeautifulSOAP):
+ pass
+
+######################################################
+#
+# Bonus library: Unicode, Dammit
+#
+# This class forces XML data into a standard format (usually to UTF-8
+# or Unicode). It is heavily based on code from Mark Pilgrim's
+# Universal Feed Parser. It does not rewrite the XML or HTML to
+# reflect a new encoding: that happens in BeautifulStoneSoup.handle_pi
+# (XML) and BeautifulSoup.start_meta (HTML).
+
+# Autodetects character encodings.
+# Download from http://chardet.feedparser.org/
+try:
+ import chardet
+# import chardet.constants
+# chardet.constants._debug = 1
+except ImportError:
+ chardet = None
+
+# cjkcodecs and iconv_codec make Python know about more character encodings.
+# Both are available from http://cjkpython.i18n.org/
+# They're built in if you use Python 2.4.
+try:
+ import cjkcodecs.aliases
+except ImportError:
+ pass
+try:
+ import iconv_codec
+except ImportError:
+ pass
+
+class UnicodeDammit:
+ """A class for detecting the encoding of a *ML document and
+ converting it to a Unicode string. If the source encoding is
+ windows-1252, can replace MS smart quotes with their HTML or XML
+ equivalents."""
+
+ # This dictionary maps commonly seen values for "charset" in HTML
+ # meta tags to the corresponding Python codec names. It only covers
+ # values that aren't in Python's aliases and can't be determined
+ # by the heuristics in find_codec.
+ CHARSET_ALIASES = { "macintosh" : "mac-roman",
+ "x-sjis" : "shift-jis" }
+
+ def __init__(self, markup, overrideEncodings=[],
+ smartQuotesTo='xml', isHTML=False):
+ self.declaredHTMLEncoding = None
+ self.markup, documentEncoding, sniffedEncoding = \
+ self._detectEncoding(markup, isHTML)
+ self.smartQuotesTo = smartQuotesTo
+ self.triedEncodings = []
+ if markup == '' or isinstance(markup, unicode):
+ self.originalEncoding = None
+ self.unicode = unicode(markup)
+ return
+
+ u = None
+ for proposedEncoding in overrideEncodings:
+ u = self._convertFrom(proposedEncoding)
+ if u: break
+ if not u:
+ for proposedEncoding in (documentEncoding, sniffedEncoding):
+ u = self._convertFrom(proposedEncoding)
+ if u: break
+
+ # If no luck and we have auto-detection library, try that:
+ if not u and chardet and not isinstance(self.markup, unicode):
+ u = self._convertFrom(chardet.detect(self.markup)['encoding'])
+
+ # As a last resort, try utf-8 and windows-1252:
+ if not u:
+ for proposed_encoding in ("utf-8", "windows-1252"):
+ u = self._convertFrom(proposed_encoding)
+ if u: break
+
+ self.unicode = u
+ if not u: self.originalEncoding = None
+
+ def _subMSChar(self, orig):
+ """Changes a MS smart quote character to an XML or HTML
+ entity."""
+ sub = self.MS_CHARS.get(orig)
+ if isinstance(sub, tuple):
+ if self.smartQuotesTo == 'xml':
+ sub = '&#x%s;' % sub[1]
+ else:
+ sub = '&%s;' % sub[0]
+ return sub
+
+ def _convertFrom(self, proposed):
+ proposed = self.find_codec(proposed)
+ if not proposed or proposed in self.triedEncodings:
+ return None
+ self.triedEncodings.append(proposed)
+ markup = self.markup
+
+ # Convert smart quotes to HTML if coming from an encoding
+ # that might have them.
+ if self.smartQuotesTo and proposed.lower() in("windows-1252",
+ "iso-8859-1",
+ "iso-8859-2"):
+ markup = re.compile("([\x80-\x9f])").sub \
+ (lambda(x): self._subMSChar(x.group(1)),
+ markup)
+
+ try:
+ # print "Trying to convert document to %s" % proposed
+ u = self._toUnicode(markup, proposed)
+ self.markup = u
+ self.originalEncoding = proposed
+ except Exception, e:
+ # print "That didn't work!"
+ # print e
+ return None
+ #print "Correct encoding: %s" % proposed
+ return self.markup
+
+ def _toUnicode(self, data, encoding):
+ '''Given a string and its encoding, decodes the string into Unicode.
+ %encoding is a string recognized by encodings.aliases'''
+
+ # strip Byte Order Mark (if present)
+ if (len(data) >= 4) and (data[:2] == '\xfe\xff') \
+ and (data[2:4] != '\x00\x00'):
+ encoding = 'utf-16be'
+ data = data[2:]
+ elif (len(data) >= 4) and (data[:2] == '\xff\xfe') \
+ and (data[2:4] != '\x00\x00'):
+ encoding = 'utf-16le'
+ data = data[2:]
+ elif data[:3] == '\xef\xbb\xbf':
+ encoding = 'utf-8'
+ data = data[3:]
+ elif data[:4] == '\x00\x00\xfe\xff':
+ encoding = 'utf-32be'
+ data = data[4:]
+ elif data[:4] == '\xff\xfe\x00\x00':
+ encoding = 'utf-32le'
+ data = data[4:]
+ newdata = unicode(data, encoding)
+ return newdata
+
+ def _detectEncoding(self, xml_data, isHTML=False):
+ """Given a document, tries to detect its XML encoding."""
+ xml_encoding = sniffed_xml_encoding = None
+ try:
+ if xml_data[:4] == '\x4c\x6f\xa7\x94':
+ # EBCDIC
+ xml_data = self._ebcdic_to_ascii(xml_data)
+ elif xml_data[:4] == '\x00\x3c\x00\x3f':
+ # UTF-16BE
+ sniffed_xml_encoding = 'utf-16be'
+ xml_data = unicode(xml_data, 'utf-16be').encode('utf-8')
+ elif (len(xml_data) >= 4) and (xml_data[:2] == '\xfe\xff') \
+ and (xml_data[2:4] != '\x00\x00'):
+ # UTF-16BE with BOM
+ sniffed_xml_encoding = 'utf-16be'
+ xml_data = unicode(xml_data[2:], 'utf-16be').encode('utf-8')
+ elif xml_data[:4] == '\x3c\x00\x3f\x00':
+ # UTF-16LE
+ sniffed_xml_encoding = 'utf-16le'
+ xml_data = unicode(xml_data, 'utf-16le').encode('utf-8')
+ elif (len(xml_data) >= 4) and (xml_data[:2] == '\xff\xfe') and \
+ (xml_data[2:4] != '\x00\x00'):
+ # UTF-16LE with BOM
+ sniffed_xml_encoding = 'utf-16le'
+ xml_data = unicode(xml_data[2:], 'utf-16le').encode('utf-8')
+ elif xml_data[:4] == '\x00\x00\x00\x3c':
+ # UTF-32BE
+ sniffed_xml_encoding = 'utf-32be'
+ xml_data = unicode(xml_data, 'utf-32be').encode('utf-8')
+ elif xml_data[:4] == '\x3c\x00\x00\x00':
+ # UTF-32LE
+ sniffed_xml_encoding = 'utf-32le'
+ xml_data = unicode(xml_data, 'utf-32le').encode('utf-8')
+ elif xml_data[:4] == '\x00\x00\xfe\xff':
+ # UTF-32BE with BOM
+ sniffed_xml_encoding = 'utf-32be'
+ xml_data = unicode(xml_data[4:], 'utf-32be').encode('utf-8')
+ elif xml_data[:4] == '\xff\xfe\x00\x00':
+ # UTF-32LE with BOM
+ sniffed_xml_encoding = 'utf-32le'
+ xml_data = unicode(xml_data[4:], 'utf-32le').encode('utf-8')
+ elif xml_data[:3] == '\xef\xbb\xbf':
+ # UTF-8 with BOM
+ sniffed_xml_encoding = 'utf-8'
+ xml_data = unicode(xml_data[3:], 'utf-8').encode('utf-8')
+ else:
+ sniffed_xml_encoding = 'ascii'
+ pass
+ except:
+ xml_encoding_match = None
+ xml_encoding_match = re.compile(
+ '^<\?.*encoding=[\'"](.*?)[\'"].*\?>').match(xml_data)
+ if not xml_encoding_match and isHTML:
+ regexp = re.compile('<\s*meta[^>]+charset=([^>]*?)[;\'">]', re.I)
+ xml_encoding_match = regexp.search(xml_data)
+ if xml_encoding_match is not None:
+ xml_encoding = xml_encoding_match.groups()[0].lower()
+ if isHTML:
+ self.declaredHTMLEncoding = xml_encoding
+ if sniffed_xml_encoding and \
+ (xml_encoding in ('iso-10646-ucs-2', 'ucs-2', 'csunicode',
+ 'iso-10646-ucs-4', 'ucs-4', 'csucs4',
+ 'utf-16', 'utf-32', 'utf_16', 'utf_32',
+ 'utf16', 'u16')):
+ xml_encoding = sniffed_xml_encoding
+ return xml_data, xml_encoding, sniffed_xml_encoding
+
+
+ def find_codec(self, charset):
+ return self._codec(self.CHARSET_ALIASES.get(charset, charset)) \
+ or (charset and self._codec(charset.replace("-", ""))) \
+ or (charset and self._codec(charset.replace("-", "_"))) \
+ or charset
+
+ def _codec(self, charset):
+ if not charset: return charset
+ codec = None
+ try:
+ codecs.lookup(charset)
+ codec = charset
+ except (LookupError, ValueError):
+ pass
+ return codec
+
+ EBCDIC_TO_ASCII_MAP = None
+ def _ebcdic_to_ascii(self, s):
+ c = self.__class__
+ if not c.EBCDIC_TO_ASCII_MAP:
+ emap = (0,1,2,3,156,9,134,127,151,141,142,11,12,13,14,15,
+ 16,17,18,19,157,133,8,135,24,25,146,143,28,29,30,31,
+ 128,129,130,131,132,10,23,27,136,137,138,139,140,5,6,7,
+ 144,145,22,147,148,149,150,4,152,153,154,155,20,21,158,26,
+ 32,160,161,162,163,164,165,166,167,168,91,46,60,40,43,33,
+ 38,169,170,171,172,173,174,175,176,177,93,36,42,41,59,94,
+ 45,47,178,179,180,181,182,183,184,185,124,44,37,95,62,63,
+ 186,187,188,189,190,191,192,193,194,96,58,35,64,39,61,34,
+ 195,97,98,99,100,101,102,103,104,105,196,197,198,199,200,
+ 201,202,106,107,108,109,110,111,112,113,114,203,204,205,
+ 206,207,208,209,126,115,116,117,118,119,120,121,122,210,
+ 211,212,213,214,215,216,217,218,219,220,221,222,223,224,
+ 225,226,227,228,229,230,231,123,65,66,67,68,69,70,71,72,
+ 73,232,233,234,235,236,237,125,74,75,76,77,78,79,80,81,
+ 82,238,239,240,241,242,243,92,159,83,84,85,86,87,88,89,
+ 90,244,245,246,247,248,249,48,49,50,51,52,53,54,55,56,57,
+ 250,251,252,253,254,255)
+ import string
+ c.EBCDIC_TO_ASCII_MAP = string.maketrans( \
+ ''.join(map(chr, range(256))), ''.join(map(chr, emap)))
+ return s.translate(c.EBCDIC_TO_ASCII_MAP)
+
+ MS_CHARS = { '\x80' : ('euro', '20AC'),
+ '\x81' : ' ',
+ '\x82' : ('sbquo', '201A'),
+ '\x83' : ('fnof', '192'),
+ '\x84' : ('bdquo', '201E'),
+ '\x85' : ('hellip', '2026'),
+ '\x86' : ('dagger', '2020'),
+ '\x87' : ('Dagger', '2021'),
+ '\x88' : ('circ', '2C6'),
+ '\x89' : ('permil', '2030'),
+ '\x8A' : ('Scaron', '160'),
+ '\x8B' : ('lsaquo', '2039'),
+ '\x8C' : ('OElig', '152'),
+ '\x8D' : '?',
+ '\x8E' : ('#x17D', '17D'),
+ '\x8F' : '?',
+ '\x90' : '?',
+ '\x91' : ('lsquo', '2018'),
+ '\x92' : ('rsquo', '2019'),
+ '\x93' : ('ldquo', '201C'),
+ '\x94' : ('rdquo', '201D'),
+ '\x95' : ('bull', '2022'),
+ '\x96' : ('ndash', '2013'),
+ '\x97' : ('mdash', '2014'),
+ '\x98' : ('tilde', '2DC'),
+ '\x99' : ('trade', '2122'),
+ '\x9a' : ('scaron', '161'),
+ '\x9b' : ('rsaquo', '203A'),
+ '\x9c' : ('oelig', '153'),
+ '\x9d' : '?',
+ '\x9e' : ('#x17E', '17E'),
+ '\x9f' : ('Yuml', ''),}
+
+#######################################################################
+
+
+#By default, act as an HTML pretty-printer.
+if __name__ == '__main__':
+ import sys
+ soup = BeautifulSoup(sys.stdin)
+ print soup.prettify()
diff --git a/site_utils/rpm_control_system/__init__.py b/site_utils/rpm_control_system/__init__.py
new file mode 100644
index 0000000..e69de29
--- /dev/null
+++ b/site_utils/rpm_control_system/__init__.py
diff --git a/site_utils/rpm_control_system/dli.py b/site_utils/rpm_control_system/dli.py
new file mode 100644
index 0000000..e7a2f70
--- /dev/null
+++ b/site_utils/rpm_control_system/dli.py
@@ -0,0 +1,109 @@
+#!/usr/bin/python
+import time,re,pycurl,BeautifulSoup,optparse
+
+###############################################################
+# Digital Loggers Web Power Switch management
+###############################################################
+# Version: 0.01
+# Description: This is both a module and a script
+#
+# The module provides a python class named
+# DLIPower that allows managing the web power
+# switch from python programs.
+#
+# When run as a script this acts as a command
+# line utilty to manage the DLI Power switch.
+# Author: Dwight Hubbard d@dhub.me
+# Copyright: This module may be used for any use personal
+# or commercial as long as the author and copyright
+# notice are included in full.
+###############################################################
+
+# Global settings
+# Timeout in seconds
+TIMEOUT=5
+
+class powerswitch:
+ """ Manage the DLI Web power switch """
+ def __init__(self,userid='admin',password='4321',hostname='192.168.0.100'):
+ self.userid=userid
+ self.password=password
+ self.hostname=hostname
+ self.contents=''
+ def verify(self):
+ """ Verify we can reach the switch, returns true if ok """
+ return self.geturl()
+ def body_callback(self,buf):
+ self.contents=self.contents+buf
+ def geturl(self,url='index.htm') :
+ self.contents=''
+ curl = pycurl.Curl()
+ curl.setopt(curl.TIMEOUT,TIMEOUT)
+ curl.setopt(curl.URL, 'http://%s:%s@%s/%s' % (self.userid,self.password,self.hostname,url))
+ curl.setopt(curl.WRITEFUNCTION, self.body_callback)
+ try:
+ curl.perform()
+ curl.close()
+ except pycurl.error:
+ return None
+ return self.contents
+ def off(self,outlet=0):
+ """ Turn off a power to an outlet """
+ self.geturl(url= 'outlet?%d=OFF' % outlet)
+ def on(self,outlet=0):
+ """ Turn on power to an outlet """
+ self.geturl(url= 'outlet?%d=ON' % outlet)
+ def statuslist(self):
+ """ Return the status of all outlets in a list,
+ each item will contain 3 itmes plugnumber, hostname and state """
+ outlets=[]
+ url=self.geturl('index.htm')
+ if not url:
+ return None
+ soup=BeautifulSoup.BeautifulSoup(url)
+ try:
+ powertable=soup.findAll('table')[5]
+ except IndexError:
+ return None
+ for temp in powertable.findAll('tr')[2:]:
+ columns=temp.findAll('td')
+ plugnumber=columns[0].string
+ hostname=columns[1].string
+ state=columns[2].find('font').string
+ outlets.append([int(plugnumber),hostname,state])
+ return outlets
+ def printstatus(self):
+ """ Print the status off all the outlets as a table to stdout """
+ if not self.statuslist():
+ print "Unable to communicte to the Web power switch at %s" % self.hostname
+ return None
+ print 'Outlet\t%-15.15s\tState' % 'Hostname'
+ for item in self.statuslist():
+ print '%d\t%-15.15s\t%s' % (item[0],item[1],item[2])
+ def status(self,outlet=1):
+ """ Return the status of an outlet, returned value will be one of: On, Off, Unknown """
+ outlets=self.statuslist()
+ if outlet:
+ for plug in outlets:
+ if plug[0] == outlet:
+ return plug[2]
+ return 'Unknown'
+
+if __name__ == "__main__":
+ parser = optparse.OptionParser()
+ parser.add_option('--hostname',dest='hostname',default="192.168.0.100")
+ parser.add_option('--user', dest='user', default="admin")
+ parser.add_option('--password',dest='password',default="4321")
+ (options, args) = parser.parse_args()
+
+ switch=powerswitch(userid=options.user,password=options.password,hostname=options.hostname)
+ if len(args):
+ if len(args) == 2:
+ if args[0].lower() in ['on','poweron']:
+ switch.on(int(args[1]))
+ if args[0].lower() in ['off','poweroff']:
+ switch.off(int(args[1]))
+ if args[0].lower() in ['status']:
+ print switch.status(int(args[1]))
+ else:
+ switch.printstatus()
diff --git a/site_utils/rpm_control_system/rpm_config.ini b/site_utils/rpm_control_system/rpm_config.ini
new file mode 100644
index 0000000..62b0016
--- /dev/null
+++ b/site_utils/rpm_control_system/rpm_config.ini
@@ -0,0 +1,13 @@
+[CROS]
+# The zone that all Chrome OS devices are in if they are in a lab.
+dns_zone: mtv.corp.google.com
+
+[SENTRY]
+# Access information for Sentry Based Devices.
+username: admn
+password: admn
+
+[WEBPOWERED]
+# Access information for Web Powered Devices.
+username: admin
+password: 1234
diff --git a/site_utils/rpm_control_system/rpm_controller.py b/site_utils/rpm_control_system/rpm_controller.py
new file mode 100644
index 0000000..736708f
--- /dev/null
+++ b/site_utils/rpm_control_system/rpm_controller.py
@@ -0,0 +1,339 @@
+# Copyright (c) 2012 The Chromium OS Authors. All rights reserved.
+# Use of this source code is governed by a BSD-style license that can be
+# found in the LICENSE file.
+
+import ConfigParser
+import logging
+import pexpect
+import Queue
+import threading
+import time
+
+import dli
+
+
+# Format Appears as: [Date] [Time] - [Msg Level] - [Message]
+LOGGING_FORMAT = '%(asctime)s - %(levelname)s - %(message)s'
+CONFIG_FILE = 'rpm_config.ini'
+CONFIG = ConfigParser.ConfigParser()
+CONFIG.read(CONFIG_FILE)
+
+
+class RPMController(object):
+ """
+ This abstract class implements RPM request queueing and
+ processes queued requests.
+
+ The actual interaction with the RPM device will be implemented
+ by the RPM specific subclasses.
+
+ It assumes that you know the RPM hostname and that the DUT is on
+ the specified RPM.
+
+ Implementation details:
+ This is an abstract class, subclasses must implement the methods
+ listed here. You must not instantiate this class but should
+ instantiate one of those leaf subclasses.
+
+ @var hostname: hostname for this rpm device.
+ @var is_running_lock: lock used to control access to _running.
+ @var request_queue: queue used to store requested outlet state changes.
+ @var queue_lock: lock used to control access to request_queue.
+ @var _running: boolean value to represent if this controller is currently
+ looping over queued requests.
+ """
+
+
+ def __init__(self, rpm_hostname):
+ """
+ RPMController Constructor.
+ To be called by subclasses.
+
+ @param rpm_hostname: hostname of rpm device to be controlled.
+ """
+ dns_zone = CONFIG.get('CROS', 'dns_zone')
+ self.hostname = '.'.join([rpm_hostname, dns_zone])
+ self.request_queue = Queue.Queue()
+ self._running = False
+ self.is_running_lock = threading.Lock()
+
+
+ def _start_processing_requests(self):
+ """
+ Check if there is a thread processing requests.
+ If not start one.
+ """
+ with self.is_running_lock:
+ if not self._running:
+ self._running = True
+ self._running_thread = threading.Thread(target=self._run)
+ self._running_thread.start()
+
+
+ def _stop_processing_requests(self):
+ """
+ Called if the request request_queue is empty.
+ Set running status to false.
+ """
+ with self.is_running_lock:
+ logging.debug('Request queue is empty. RPM Controller for %s'
+ ' is terminating.', self.hostname)
+ self._running = False
+ if not self.request_queue.empty():
+ # This can occur if an item was pushed into the queue after we
+ # exited the while-check and before the _stop_processing_requests
+ # call was made. Therefore we need to start processing again.
+ self._start_processing_requests()
+
+
+ def _run(self):
+ """
+ Processes all queued up requests for this RPM Controller.
+ Callers should first request_queue up atleast one request and if this
+ RPM Controller is not running then call run.
+
+ Caller can either simply call run but then they will be blocked or
+ can instantiate a new thread to process all queued up requests.
+ For example:
+ threading.Thread(target=rpm_controller.run).start()
+
+ Requests are in the format of:
+ [dut_hostname, new_state, condition_var, result]
+ Run will set the result with the correct value.
+ """
+ while not self.request_queue.empty():
+ request = self.request_queue.get()
+ result = self.set_power_state(request['dut'], request['new_state'])
+ if not result:
+ logging.error('Request to change %s to state %s failed.',
+ request['dut'], request['new_state'])
+ # Put result inside the result Queue to allow the caller to resume.
+ request['result_queue'].put(result)
+ self._stop_processing_requests()
+
+
+ def queue_request(self, dut_hostname, new_state):
+ """
+ Queues up a requested state change for a DUT's outlet.
+
+ Requests are in the format of:
+ [dut_hostname, new_state, condition_var, result]
+ Run will set the result with the correct value.
+
+ @param dut_hostname: hostname of DUT whose outlet we want to change.
+ @param new_state: ON/OFF/CYCLE - state or action we want to perform on
+ the outlet.
+ """
+ request = {}
+ request['dut'] = dut_hostname
+ request['new_state'] = new_state
+ # Reserve a spot for the result to be stored.
+ request['result_queue'] = Queue.Queue()
+ # Place in request_queue
+ self.request_queue.put(request)
+ self._start_processing_requests()
+ # Block until the request is processed.
+ result = request['result_queue'].get(block=True)
+ return result
+
+
+ def set_power_state(self, dut_hostname, new_state):
+ """
+ Set the state of the dut's outlet on this RPM.
+ To be implemented by the subclasses.
+
+ @param dut_hostname: hostname of DUT whose outlet we want to change.
+ @param new_state: ON/OFF/CYCLE - state or action we want to perform on
+ the outlet.
+
+ @return: True if the attempt to change power state was successful,
+ False otherwise.
+ """
+ raise NotImplementedError('Abstract class. Subclasses should implement '
+ 'set_power_state().')
+
+
+ def type(self):
+ """
+ Get the type of RPM device we are interacting with.
+ To be implemented by the subclasses.
+
+ @return: string representation of RPM device type.
+ """
+ raise NotImplementedError('Abstract class. Subclasses should implement '
+ 'type().')
+
+
+class SentryRPMController(RPMController):
+ """
+ This class implements power control for Sentry Switched CDU
+ http://www.servertech.com/products/switched-pdus/
+
+ Example usage:
+ rpm = SentrySwitchedCDU('chromeos-rack1-rpm1')
+ rpm.queue_request('chromeos-rack1-host1', 'ON')
+
+ @var _username: username used to access device.
+ @var _password: password used to access device.
+ @var _ssh_mock: mocked ssh interface used for testing.
+ """
+
+
+ DEVICE_PROMPT = 'Switched CDU:'
+ SSH_LOGIN_CMD = 'ssh -l %s -o StrictHostKeyChecking=no ' \
+ '-o UserKnownHostsFile=/dev/null %s'
+ PASSWORD_PROMPT = 'Password:'
+ SET_STATE_CMD = '%s %s'
+ SUCCESS_MSG = 'Command successful'
+ LOGOUT_CMD = 'logout'
+
+
+ def __init__(self, hostname, ssh_mock=None):
+ super(SentryRPMController, self).__init__(hostname)
+ self._username = CONFIG.get('SENTRY', 'username')
+ self._password = CONFIG.get('SENTRY', 'password')
+ self._ssh_mock = ssh_mock
+
+
+ def set_power_state(self, dut_hostname, new_state):
+ logging.debug("Setting outlet for DUT: %s to state: %s",
+ dut_hostname, new_state)
+ result = True
+ cmd = SentryRPMController.SSH_LOGIN_CMD % (self._username,
+ self.hostname)
+ if not self._ssh_mock: # For testing purposes.
+ ssh = pexpect.spawn(cmd)
+ else:
+ ssh = self._ssh_mock
+ ssh.expect(SentryRPMController.PASSWORD_PROMPT, timeout=60)
+ ssh.sendline(self._password)
+ ssh.expect(SentryRPMController.DEVICE_PROMPT, timeout=60)
+ ssh.sendline(SentryRPMController.SET_STATE_CMD % (new_state,
+ dut_hostname))
+ try:
+ ssh.expect(SentryRPMController.SUCCESS_MSG, timeout=60)
+ except pexpect.TIMEOUT:
+ logging.error('Request to change outlet for DUT: %s to new '
+ 'state %s timed out.', dut_hostname, new_state)
+ result = False
+ finally:
+ ssh.sendline(SentryRPMController.LOGOUT_CMD)
+ return result
+
+
+ def type(self):
+ return 'Sentry'
+
+
+class WebPoweredRPMController(RPMController):
+ """
+ This class implements RPMController for the Web Powered units
+ produced by Digital Loggers Inc.
+
+ @var _rpm: dli.powerswitch instance used to interact with RPM.
+ """
+
+
+ CYCLE_SLEEP_TIME = 5
+
+
+ def __init__(self, hostname, powerswitch=None):
+ username = CONFIG.get('WEBPOWERED', 'username')
+ password = CONFIG.get('WEBPOWERED', 'password')
+ super(WebPoweredRPMController, self).__init__(hostname)
+ if not powerswitch:
+ self._rpm = dli.powerswitch(hostname=self.hostname, userid=username,
+ password=password)
+ else:
+ # Should only be used in unit_testing
+ self._rpm = powerswitch
+
+
+ def _get_outlet_value_and_state(self, dut_hostname):
+ """
+ Look up the outlet and state for a given hostname on the RPM.
+
+ @param dut_hostname: hostname of DUT whose outlet we want to lookup.
+
+ @return [outlet, state]: the outlet number as well as its current state.
+ """
+ status_list = self._rpm.statuslist()
+ for outlet, hostname, state in status_list:
+ if hostname == dut_hostname:
+ return outlet, state
+ return None
+
+
+ def set_power_state(self, dut_hostname, new_state):
+ outlet_and_state = self._get_outlet_value_and_state(dut_hostname)
+ if not outlet_and_state:
+ logging.error('DUT %s is not on rpm %s',
+ dut_hostname, self.hostname)
+ return False
+ outlet, state = outlet_and_state
+ expected_state = new_state
+ if new_state == 'CYCLE':
+ logging.debug('Beginning Power Cycle for DUT: %s',
+ dut_hostname)
+ self._rpm.off(outlet)
+ logging.debug('Outlet for DUT: %s set to OFF', dut_hostname)
+ # Pause for 5 seconds before restoring power.
+ time.sleep(WebPoweredRPMController.CYCLE_SLEEP_TIME)
+ self._rpm.on(outlet)
+ logging.debug('Outlet for DUT: %s set to ON', dut_hostname)
+ expected_state = 'ON'
+ if new_state == 'OFF':
+ self._rpm.off(outlet)
+ logging.debug('Outlet for DUT: %s set to OFF', dut_hostname)
+ if new_state == 'ON':
+ self._rpm.on(outlet)
+ logging.debug('Outlet for DUT: %s set to ON', dut_hostname)
+ # Lookup the final state of the outlet
+ return self._is_plug_state(dut_hostname, expected_state)
+
+
+ def _is_plug_state(self, dut_hostname, expected_state):
+ outlet, state = self._get_outlet_value_and_state(dut_hostname)
+ if expected_state not in state:
+ logging.error('Outlet for DUT: %s did not change to new state'
+ ' %s', dut_hostname, expected_state)
+ return False
+ return True
+
+
+ def type(self):
+ return 'Webpowered'
+
+
+def test_in_order_requests():
+ """Simple integration testing."""
+ rpm = WebPoweredRPMController('chromeos-rack8e-rpm1')
+ rpm.queue_request('chromeos-rack8e-hostbs1', 'OFF')
+ rpm.queue_request('chromeos-rack8e-hostbs2', 'OFF')
+ rpm.queue_request('chromeos-rack8e-hostbs3', 'CYCLE')
+
+
+def test_parrallel_webrequests():
+ """Simple integration testing."""
+ rpm = WebPoweredRPMController('chromeos-rack8e-rpm1')
+ threading.Thread(target=rpm.queue_request,
+ args=('chromeos-rack8e-hostbs1', 'ON')).start()
+ threading.Thread(target=rpm.queue_request,
+ args=('chromeos-rack8e-hostbs2', 'ON')).start()
+
+
+def test_parrallel_sshrequests():
+ """Simple integration testing."""
+ rpm = SentryRPMController('chromeos-rack1-rpm1')
+ threading.Thread(target=rpm.queue_request,
+ args=('chromeos-rack1-hostbs1', 'OFF')).start()
+ threading.Thread(target=rpm.queue_request,
+ args=('chromeos-rack1-hostbs2', 'ON')).start()
+
+
+if __name__ == '__main__':
+ logging.basicConfig(level=logging.DEBUG, format=LOGGING_FORMAT)
+ test_in_order_requests()
+ test_parrallel_webrequests()
+ test_parrallel_sshrequests()
+
diff --git a/site_utils/rpm_control_system/rpm_controller_unittest.py b/site_utils/rpm_control_system/rpm_controller_unittest.py
new file mode 100644
index 0000000..deeab7d
--- /dev/null
+++ b/site_utils/rpm_control_system/rpm_controller_unittest.py
@@ -0,0 +1,110 @@
+# Copyright (c) 2012 The Chromium OS Authors. All rights reserved.
+# Use of this source code is governed by a BSD-style license that can be
+# found in the LICENSE file.
+
+import logging
+import mox
+import pexpect
+import time
+
+import dli
+
+import rpm_controller
+
+
+class TestSentryRPMController(mox.MoxTestBase):
+
+
+ def setUp(self):
+ super(TestSentryRPMController, self).setUp()
+ self.ssh = self.mox.CreateMock(pexpect.spawn)
+ self.rpm = rpm_controller.SentryRPMController('chromeos-rack1-host8',
+ self.ssh)
+
+
+ def testSuccessfullyChangeOutlet(self):
+ """Should return True if change was successful."""
+ prompt = 'Switched CDU:'
+ password = 'admn'
+ dut_hostname = 'chromos-rack1-host8'
+ new_state = 'ON'
+ self.ssh.expect('Password:', timeout=60)
+ self.ssh.sendline(password)
+ self.ssh.expect(prompt, timeout=60)
+ self.ssh.sendline('%s %s' % (new_state, dut_hostname))
+ self.ssh.expect('Command successful', timeout=60)
+ self.ssh.sendline('logout')
+ self.mox.ReplayAll()
+ self.assertTrue(self.rpm.queue_request(dut_hostname, new_state))
+ self.mox.VerifyAll()
+
+
+ def testUnsuccessfullyChangeOutlet(self):
+ """Should return False if change was unsuccessful."""
+ prompt = 'Switched CDU:'
+ password = 'admn'
+ dut_hostname = 'chromos-rack1-host8'
+ new_state = 'ON'
+ self.ssh.expect('Password:', timeout=60)
+ self.ssh.sendline(password)
+ self.ssh.expect(prompt, timeout=60)
+ self.ssh.sendline('%s %s' % (new_state, dut_hostname))
+ self.ssh.expect('Command successful',
+ timeout=60).AndRaise(pexpect.TIMEOUT('Timed Out'))
+ self.ssh.sendline('logout')
+ self.mox.ReplayAll()
+ self.assertFalse(self.rpm.queue_request(dut_hostname, new_state))
+ self.mox.VerifyAll()
+
+
+class TestWebPoweredRPMController(mox.MoxTestBase):
+
+
+ def setUp(self):
+ super(TestWebPoweredRPMController, self).setUp()
+ self.dli_ps = self.mox.CreateMock(dli.powerswitch)
+ hostname = 'chromeos-rack8a-rpm1'
+ self.web_rpm = rpm_controller.WebPoweredRPMController(hostname,
+ self.dli_ps)
+ outlet = 8
+ dut = 'chromeos-rack8a-host8'
+ # Outlet statuses are in the format "u'ON'"
+ initial_state = 'u\'ON\''
+ self.test_status_list_initial = [[outlet, dut, initial_state]]
+
+
+ def testSuccessfullyChangeOutlet(self):
+ """Should return True if change was successful."""
+ test_status_list_final = [[8,'chromeos-rack8a-host8','u\'OFF\'']]
+ self.dli_ps.statuslist().AndReturn(self.test_status_list_initial)
+ self.dli_ps.off(8)
+ self.dli_ps.statuslist().AndReturn(test_status_list_final)
+ self.mox.ReplayAll()
+ self.assertTrue(self.web_rpm.queue_request('chromeos-rack8a-host8',
+ 'OFF'))
+ self.mox.VerifyAll()
+
+
+ def testUnsuccessfullyChangeOutlet(self):
+ """Should return False if Outlet State does not change."""
+ test_status_list_final = [[8,'chromeos-rack8a-host8','u\'ON\'']]
+ self.dli_ps.statuslist().AndReturn(self.test_status_list_initial)
+ self.dli_ps.off(8)
+ self.dli_ps.statuslist().AndReturn(test_status_list_final)
+ self.mox.ReplayAll()
+ self.assertFalse(self.web_rpm.queue_request('chromeos-rack8a-host8',
+ 'OFF'))
+ self.mox.VerifyAll()
+
+
+ def testDutNotOnRPM(self):
+ """Should return False if DUT hostname is not on the RPM device."""
+ self.dli_ps.statuslist().AndReturn(self.test_status_list_initial)
+ self.mox.ReplayAll()
+ self.assertFalse(self.web_rpm.queue_request('chromeos-rack8a-host1',
+ 'OFF'))
+ self.mox.VerifyAll()
+
+
+if __name__ == "__main__":
+ unittest.main()