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439 lines
15 KiB
Python
439 lines
15 KiB
Python
import htmlentitydefs
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import pprint
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import re
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import sgmllib
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import unittest
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from test import test_support
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class EventCollector(sgmllib.SGMLParser):
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def __init__(self):
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self.events = []
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self.append = self.events.append
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sgmllib.SGMLParser.__init__(self)
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def get_events(self):
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# Normalize the list of events so that buffer artefacts don't
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# separate runs of contiguous characters.
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L = []
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prevtype = None
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for event in self.events:
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type = event[0]
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if type == prevtype == "data":
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L[-1] = ("data", L[-1][1] + event[1])
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else:
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L.append(event)
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prevtype = type
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self.events = L
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return L
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# structure markup
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def unknown_starttag(self, tag, attrs):
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self.append(("starttag", tag, attrs))
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def unknown_endtag(self, tag):
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self.append(("endtag", tag))
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# all other markup
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def handle_comment(self, data):
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self.append(("comment", data))
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def handle_charref(self, data):
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self.append(("charref", data))
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def handle_data(self, data):
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self.append(("data", data))
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def handle_decl(self, decl):
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self.append(("decl", decl))
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def handle_entityref(self, data):
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self.append(("entityref", data))
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def handle_pi(self, data):
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self.append(("pi", data))
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def unknown_decl(self, decl):
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self.append(("unknown decl", decl))
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class CDATAEventCollector(EventCollector):
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def start_cdata(self, attrs):
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self.append(("starttag", "cdata", attrs))
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self.setliteral()
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class HTMLEntityCollector(EventCollector):
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entity_or_charref = re.compile('(?:&([a-zA-Z][-.a-zA-Z0-9]*)'
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'|&#(x[0-9a-zA-Z]+|[0-9]+))(;?)')
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def convert_charref(self, name):
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self.append(("charref", "convert", name))
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if name[0] != "x":
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return EventCollector.convert_charref(self, name)
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def convert_codepoint(self, codepoint):
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self.append(("codepoint", "convert", codepoint))
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EventCollector.convert_codepoint(self, codepoint)
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def convert_entityref(self, name):
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self.append(("entityref", "convert", name))
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return EventCollector.convert_entityref(self, name)
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# These to record that they were called, then pass the call along
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# to the default implementation so that it's actions can be
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# recorded.
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def handle_charref(self, data):
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self.append(("charref", data))
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sgmllib.SGMLParser.handle_charref(self, data)
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def handle_entityref(self, data):
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self.append(("entityref", data))
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sgmllib.SGMLParser.handle_entityref(self, data)
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class SGMLParserTestCase(unittest.TestCase):
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collector = EventCollector
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def get_events(self, source):
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parser = self.collector()
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try:
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for s in source:
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parser.feed(s)
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parser.close()
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except:
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#self.events = parser.events
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raise
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return parser.get_events()
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def check_events(self, source, expected_events):
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try:
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events = self.get_events(source)
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except:
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import sys
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#print >>sys.stderr, pprint.pformat(self.events)
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raise
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if events != expected_events:
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self.fail("received events did not match expected events\n"
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"Expected:\n" + pprint.pformat(expected_events) +
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"\nReceived:\n" + pprint.pformat(events))
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def check_parse_error(self, source):
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parser = EventCollector()
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try:
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parser.feed(source)
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parser.close()
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except sgmllib.SGMLParseError:
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pass
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else:
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self.fail("expected SGMLParseError for %r\nReceived:\n%s"
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% (source, pprint.pformat(parser.get_events())))
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def test_doctype_decl_internal(self):
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inside = """\
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DOCTYPE html PUBLIC '-//W3C//DTD HTML 4.01//EN'
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SYSTEM 'http://www.w3.org/TR/html401/strict.dtd' [
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<!ELEMENT html - O EMPTY>
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<!ATTLIST html
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version CDATA #IMPLIED
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profile CDATA 'DublinCore'>
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<!NOTATION datatype SYSTEM 'http://xml.python.org/notations/python-module'>
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<!ENTITY myEntity 'internal parsed entity'>
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<!ENTITY anEntity SYSTEM 'http://xml.python.org/entities/something.xml'>
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<!ENTITY % paramEntity 'name|name|name'>
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%paramEntity;
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<!-- comment -->
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]"""
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self.check_events(["<!%s>" % inside], [
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("decl", inside),
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])
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def test_doctype_decl_external(self):
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inside = "DOCTYPE html PUBLIC '-//W3C//DTD HTML 4.01//EN'"
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self.check_events("<!%s>" % inside, [
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("decl", inside),
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])
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def test_underscore_in_attrname(self):
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# SF bug #436621
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"""Make sure attribute names with underscores are accepted"""
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self.check_events("<a has_under _under>", [
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("starttag", "a", [("has_under", "has_under"),
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("_under", "_under")]),
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])
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def test_underscore_in_tagname(self):
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# SF bug #436621
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"""Make sure tag names with underscores are accepted"""
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self.check_events("<has_under></has_under>", [
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("starttag", "has_under", []),
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("endtag", "has_under"),
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])
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def test_quotes_in_unquoted_attrs(self):
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# SF bug #436621
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"""Be sure quotes in unquoted attributes are made part of the value"""
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self.check_events("<a href=foo'bar\"baz>", [
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("starttag", "a", [("href", "foo'bar\"baz")]),
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])
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def test_xhtml_empty_tag(self):
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"""Handling of XHTML-style empty start tags"""
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self.check_events("<br />text<i></i>", [
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("starttag", "br", []),
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("data", "text"),
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("starttag", "i", []),
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("endtag", "i"),
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])
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def test_processing_instruction_only(self):
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self.check_events("<?processing instruction>", [
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("pi", "processing instruction"),
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])
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def test_bad_nesting(self):
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self.check_events("<a><b></a></b>", [
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("starttag", "a", []),
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("starttag", "b", []),
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("endtag", "a"),
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("endtag", "b"),
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])
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def test_bare_ampersands(self):
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self.check_events("this text & contains & ampersands &", [
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("data", "this text & contains & ampersands &"),
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])
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def test_bare_pointy_brackets(self):
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self.check_events("this < text > contains < bare>pointy< brackets", [
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("data", "this < text > contains < bare>pointy< brackets"),
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])
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def test_attr_syntax(self):
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output = [
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("starttag", "a", [("b", "v"), ("c", "v"), ("d", "v"), ("e", "e")])
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]
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self.check_events("""<a b='v' c="v" d=v e>""", output)
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self.check_events("""<a b = 'v' c = "v" d = v e>""", output)
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self.check_events("""<a\nb\n=\n'v'\nc\n=\n"v"\nd\n=\nv\ne>""", output)
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self.check_events("""<a\tb\t=\t'v'\tc\t=\t"v"\td\t=\tv\te>""", output)
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def test_attr_values(self):
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self.check_events("""<a b='xxx\n\txxx' c="yyy\t\nyyy" d='\txyz\n'>""",
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[("starttag", "a", [("b", "xxx\n\txxx"),
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("c", "yyy\t\nyyy"),
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("d", "\txyz\n")])
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])
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self.check_events("""<a b='' c="">""", [
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("starttag", "a", [("b", ""), ("c", "")]),
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])
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# URL construction stuff from RFC 1808:
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safe = "$-_.+"
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extra = "!*'(),"
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reserved = ";/?:@&="
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url = "http://example.com:8080/path/to/file?%s%s%s" % (
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safe, extra, reserved)
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self.check_events("""<e a=%s>""" % url, [
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("starttag", "e", [("a", url)]),
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])
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# Regression test for SF patch #669683.
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self.check_events("<e a=rgb(1,2,3)>", [
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("starttag", "e", [("a", "rgb(1,2,3)")]),
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])
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def test_attr_values_entities(self):
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"""Substitution of entities and charrefs in attribute values"""
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# SF bug #1452246
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self.check_events("""<a b=< c=<> d=<-> e='< '
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f="&xxx;" g=' !' h='Ǵ'
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i='x?a=b&c=d;'
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j='&#42;' k='&#42;'>""",
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[("starttag", "a", [("b", "<"),
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("c", "<>"),
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("d", "<->"),
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("e", "< "),
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("f", "&xxx;"),
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("g", " !"),
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("h", "Ǵ"),
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("i", "x?a=b&c=d;"),
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("j", "*"),
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("k", "*"),
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])])
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def test_convert_overrides(self):
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# This checks that the character and entity reference
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# conversion helpers are called at the documented times. No
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# attempt is made to really change what the parser accepts.
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#
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self.collector = HTMLEntityCollector
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self.check_events(('<a title="“test”">foo</a>'
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'&foobar;*'), [
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('entityref', 'convert', 'ldquo'),
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('charref', 'convert', 'x201d'),
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('starttag', 'a', [('title', '“test”')]),
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('data', 'foo'),
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('endtag', 'a'),
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('entityref', 'foobar'),
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('entityref', 'convert', 'foobar'),
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('charref', '42'),
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('charref', 'convert', '42'),
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('codepoint', 'convert', 42),
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])
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def test_attr_funky_names(self):
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self.check_events("""<a a.b='v' c:d=v e-f=v>""", [
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("starttag", "a", [("a.b", "v"), ("c:d", "v"), ("e-f", "v")]),
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])
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def test_attr_value_ip6_url(self):
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# http://www.python.org/sf/853506
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self.check_events(("<a href='http://[1080::8:800:200C:417A]/'>"
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"<a href=http://[1080::8:800:200C:417A]/>"), [
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("starttag", "a", [("href", "http://[1080::8:800:200C:417A]/")]),
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("starttag", "a", [("href", "http://[1080::8:800:200C:417A]/")]),
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])
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def test_illegal_declarations(self):
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s = 'abc<!spacer type="block" height="25">def'
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self.check_events(s, [
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("data", "abc"),
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("unknown decl", 'spacer type="block" height="25"'),
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("data", "def"),
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])
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def test_weird_starttags(self):
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self.check_events("<a<a>", [
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("starttag", "a", []),
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("starttag", "a", []),
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])
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self.check_events("</a<a>", [
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("endtag", "a"),
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("starttag", "a", []),
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])
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def test_declaration_junk_chars(self):
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self.check_parse_error("<!DOCTYPE foo $ >")
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def test_get_starttag_text(self):
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s = """<foobar \n one="1"\ttwo=2 >"""
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self.check_events(s, [
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("starttag", "foobar", [("one", "1"), ("two", "2")]),
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])
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def test_cdata_content(self):
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s = ("<cdata> <!-- not a comment --> ¬-an-entity-ref; </cdata>"
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"<notcdata> <!-- comment --> </notcdata>")
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self.collector = CDATAEventCollector
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self.check_events(s, [
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("starttag", "cdata", []),
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("data", " <!-- not a comment --> ¬-an-entity-ref; "),
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("endtag", "cdata"),
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("starttag", "notcdata", []),
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("data", " "),
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("comment", " comment "),
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("data", " "),
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("endtag", "notcdata"),
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])
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s = """<cdata> <not a='start tag'> </cdata>"""
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self.check_events(s, [
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("starttag", "cdata", []),
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("data", " <not a='start tag'> "),
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("endtag", "cdata"),
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])
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def test_illegal_declarations(self):
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s = 'abc<!spacer type="block" height="25">def'
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self.check_events(s, [
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("data", "abc"),
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("unknown decl", 'spacer type="block" height="25"'),
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("data", "def"),
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])
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def test_enumerated_attr_type(self):
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s = "<!DOCTYPE doc [<!ATTLIST doc attr (a | b) >]>"
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self.check_events(s, [
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('decl', 'DOCTYPE doc [<!ATTLIST doc attr (a | b) >]'),
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])
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def test_read_chunks(self):
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# SF bug #1541697, this caused sgml parser to hang
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# Just verify this code doesn't cause a hang.
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CHUNK = 1024 # increasing this to 8212 makes the problem go away
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f = open(test_support.findfile('sgml_input.html'), encoding="latin-1")
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fp = sgmllib.SGMLParser()
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while 1:
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data = f.read(CHUNK)
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fp.feed(data)
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if len(data) != CHUNK:
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break
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# XXX These tests have been disabled by prefixing their names with
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# an underscore. The first two exercise outstanding bugs in the
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# sgmllib module, and the third exhibits questionable behavior
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# that needs to be carefully considered before changing it.
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def _test_starttag_end_boundary(self):
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self.check_events("<a b='<'>", [("starttag", "a", [("b", "<")])])
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self.check_events("<a b='>'>", [("starttag", "a", [("b", ">")])])
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def _test_buffer_artefacts(self):
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output = [("starttag", "a", [("b", "<")])]
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self.check_events(["<a b='<'>"], output)
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self.check_events(["<a ", "b='<'>"], output)
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self.check_events(["<a b", "='<'>"], output)
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self.check_events(["<a b=", "'<'>"], output)
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self.check_events(["<a b='<", "'>"], output)
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self.check_events(["<a b='<'", ">"], output)
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output = [("starttag", "a", [("b", ">")])]
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self.check_events(["<a b='>'>"], output)
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self.check_events(["<a ", "b='>'>"], output)
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self.check_events(["<a b", "='>'>"], output)
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self.check_events(["<a b=", "'>'>"], output)
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self.check_events(["<a b='>", "'>"], output)
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self.check_events(["<a b='>'", ">"], output)
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output = [("comment", "abc")]
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self.check_events(["", "<!--abc-->"], output)
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self.check_events(["<", "!--abc-->"], output)
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self.check_events(["<!", "--abc-->"], output)
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self.check_events(["<!-", "-abc-->"], output)
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self.check_events(["<!--", "abc-->"], output)
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self.check_events(["<!--a", "bc-->"], output)
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self.check_events(["<!--ab", "c-->"], output)
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self.check_events(["<!--abc", "-->"], output)
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self.check_events(["<!--abc-", "->"], output)
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self.check_events(["<!--abc--", ">"], output)
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self.check_events(["<!--abc-->", ""], output)
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def _test_starttag_junk_chars(self):
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self.check_parse_error("<")
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self.check_parse_error("<>")
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self.check_parse_error("</$>")
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self.check_parse_error("</")
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self.check_parse_error("</a")
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self.check_parse_error("<$")
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self.check_parse_error("<$>")
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self.check_parse_error("<!")
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self.check_parse_error("<a $>")
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self.check_parse_error("<a")
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self.check_parse_error("<a foo='bar'")
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self.check_parse_error("<a foo='bar")
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self.check_parse_error("<a foo='>'")
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self.check_parse_error("<a foo='>")
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self.check_parse_error("<a foo=>")
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def test_main():
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test_support.run_unittest(SGMLParserTestCase)
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if __name__ == "__main__":
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test_main()
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