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