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-rw-r--r--Lib/sgmllib.py550
1 files changed, 275 insertions, 275 deletions
diff --git a/Lib/sgmllib.py b/Lib/sgmllib.py
index 8baf519..035e891 100644
--- a/Lib/sgmllib.py
+++ b/Lib/sgmllib.py
@@ -16,9 +16,9 @@ import string
interesting = re.compile('[&<]')
incomplete = re.compile('&([a-zA-Z][a-zA-Z0-9]*|#[0-9]*)?|'
- '<([a-zA-Z][^<>]*|'
- '/([a-zA-Z][^<>]*)?|'
- '![^<>]*)?')
+ '<([a-zA-Z][^<>]*|'
+ '/([a-zA-Z][^<>]*)?|'
+ '![^<>]*)?')
entityref = re.compile('&([a-zA-Z][a-zA-Z0-9]*)[^a-zA-Z0-9]')
charref = re.compile('&#([0-9]+)[^0-9]')
@@ -53,300 +53,300 @@ class SGMLParser:
# Interface -- initialize and reset this instance
def __init__(self, verbose=0):
- self.verbose = verbose
- self.reset()
+ self.verbose = verbose
+ self.reset()
# Interface -- reset this instance. Loses all unprocessed data
def reset(self):
- self.rawdata = ''
- self.stack = []
- self.lasttag = '???'
- self.nomoretags = 0
- self.literal = 0
+ self.rawdata = ''
+ self.stack = []
+ self.lasttag = '???'
+ self.nomoretags = 0
+ self.literal = 0
# For derived classes only -- enter literal mode (CDATA) till EOF
def setnomoretags(self):
- self.nomoretags = self.literal = 1
+ self.nomoretags = self.literal = 1
# For derived classes only -- enter literal mode (CDATA)
def setliteral(self, *args):
- self.literal = 1
+ self.literal = 1
# Interface -- feed some data to the parser. Call this as
# often as you want, with as little or as much text as you
# want (may include '\n'). (This just saves the text, all the
# processing is done by goahead().)
def feed(self, data):
- self.rawdata = self.rawdata + data
- self.goahead(0)
+ self.rawdata = self.rawdata + data
+ self.goahead(0)
# Interface -- handle the remaining data
def close(self):
- self.goahead(1)
+ self.goahead(1)
# Internal -- handle data as far as reasonable. May leave state
# and data to be processed by a subsequent call. If 'end' is
# true, force handling all data as if followed by EOF marker.
def goahead(self, end):
- rawdata = self.rawdata
- i = 0
- n = len(rawdata)
- while i < n:
- if self.nomoretags:
- self.handle_data(rawdata[i:n])
- i = n
- break
- match = interesting.search(rawdata, i)
- if match: j = match.start(0)
- else: j = n
- if i < j: self.handle_data(rawdata[i:j])
- i = j
- if i == n: break
- if rawdata[i] == '<':
- if starttagopen.match(rawdata, i):
- if self.literal:
- self.handle_data(rawdata[i])
- i = i+1
- continue
- k = self.parse_starttag(i)
- if k < 0: break
- i = k
- continue
- if endtagopen.match(rawdata, i):
- k = self.parse_endtag(i)
- if k < 0: break
- i = k
- self.literal = 0
- continue
- if commentopen.match(rawdata, i):
- if self.literal:
- self.handle_data(rawdata[i])
- i = i+1
- continue
- k = self.parse_comment(i)
- if k < 0: break
- i = i+k
- continue
- match = special.match(rawdata, i)
- if match:
- if self.literal:
- self.handle_data(rawdata[i])
- i = i+1
- continue
- i = match.end(0)
- continue
- elif rawdata[i] == '&':
- match = charref.match(rawdata, i)
- if match:
- name = match.group(1)
- self.handle_charref(name)
- i = match.end(0)
- if rawdata[i-1] != ';': i = i-1
- continue
- match = entityref.match(rawdata, i)
- if match:
- name = match.group(1)
- self.handle_entityref(name)
- i = match.end(0)
- if rawdata[i-1] != ';': i = i-1
- continue
- else:
- raise RuntimeError, 'neither < nor & ??'
- # We get here only if incomplete matches but
- # nothing else
- match = incomplete.match(rawdata, i)
- if not match:
- self.handle_data(rawdata[i])
- i = i+1
- continue
- j = match.end(0)
- if j == n:
- break # Really incomplete
- self.handle_data(rawdata[i:j])
- i = j
- # end while
- if end and i < n:
- self.handle_data(rawdata[i:n])
- i = n
- self.rawdata = rawdata[i:]
- # XXX if end: check for empty stack
+ rawdata = self.rawdata
+ i = 0
+ n = len(rawdata)
+ while i < n:
+ if self.nomoretags:
+ self.handle_data(rawdata[i:n])
+ i = n
+ break
+ match = interesting.search(rawdata, i)
+ if match: j = match.start(0)
+ else: j = n
+ if i < j: self.handle_data(rawdata[i:j])
+ i = j
+ if i == n: break
+ if rawdata[i] == '<':
+ if starttagopen.match(rawdata, i):
+ if self.literal:
+ self.handle_data(rawdata[i])
+ i = i+1
+ continue
+ k = self.parse_starttag(i)
+ if k < 0: break
+ i = k
+ continue
+ if endtagopen.match(rawdata, i):
+ k = self.parse_endtag(i)
+ if k < 0: break
+ i = k
+ self.literal = 0
+ continue
+ if commentopen.match(rawdata, i):
+ if self.literal:
+ self.handle_data(rawdata[i])
+ i = i+1
+ continue
+ k = self.parse_comment(i)
+ if k < 0: break
+ i = i+k
+ continue
+ match = special.match(rawdata, i)
+ if match:
+ if self.literal:
+ self.handle_data(rawdata[i])
+ i = i+1
+ continue
+ i = match.end(0)
+ continue
+ elif rawdata[i] == '&':
+ match = charref.match(rawdata, i)
+ if match:
+ name = match.group(1)
+ self.handle_charref(name)
+ i = match.end(0)
+ if rawdata[i-1] != ';': i = i-1
+ continue
+ match = entityref.match(rawdata, i)
+ if match:
+ name = match.group(1)
+ self.handle_entityref(name)
+ i = match.end(0)
+ if rawdata[i-1] != ';': i = i-1
+ continue
+ else:
+ raise RuntimeError, 'neither < nor & ??'
+ # We get here only if incomplete matches but
+ # nothing else
+ match = incomplete.match(rawdata, i)
+ if not match:
+ self.handle_data(rawdata[i])
+ i = i+1
+ continue
+ j = match.end(0)
+ if j == n:
+ break # Really incomplete
+ self.handle_data(rawdata[i:j])
+ i = j
+ # end while
+ if end and i < n:
+ self.handle_data(rawdata[i:n])
+ i = n
+ self.rawdata = rawdata[i:]
+ # XXX if end: check for empty stack
# Internal -- parse comment, return length or -1 if not terminated
def parse_comment(self, i):
- rawdata = self.rawdata
- if rawdata[i:i+4] <> '<!--':
- raise RuntimeError, 'unexpected call to handle_comment'
- match = commentclose.search(rawdata, i+4)
- if not match:
- return -1
- j = match.start(0)
- self.handle_comment(rawdata[i+4: j])
- j = match.end(0)
- return j-i
+ rawdata = self.rawdata
+ if rawdata[i:i+4] <> '<!--':
+ raise RuntimeError, 'unexpected call to handle_comment'
+ match = commentclose.search(rawdata, i+4)
+ if not match:
+ return -1
+ j = match.start(0)
+ self.handle_comment(rawdata[i+4: j])
+ j = match.end(0)
+ return j-i
# Internal -- handle starttag, return length or -1 if not terminated
def parse_starttag(self, i):
- rawdata = self.rawdata
- if shorttagopen.match(rawdata, i):
- # SGML shorthand: <tag/data/ == <tag>data</tag>
- # XXX Can data contain &... (entity or char refs)?
- # XXX Can data contain < or > (tag characters)?
- # XXX Can there be whitespace before the first /?
- match = shorttag.match(rawdata, i)
- if not match:
- return -1
- tag, data = match.group(1, 2)
- tag = string.lower(tag)
- self.finish_shorttag(tag, data)
- k = match.end(0)
- return k
- # XXX The following should skip matching quotes (' or ")
- match = endbracket.search(rawdata, i+1)
- if not match:
- return -1
- j = match.start(0)
- # Now parse the data between i+1 and j into a tag and attrs
- attrs = []
- if rawdata[i:i+2] == '<>':
- # SGML shorthand: <> == <last open tag seen>
- k = j
- tag = self.lasttag
- else:
- match = tagfind.match(rawdata, i+1)
- if not match:
- raise RuntimeError, 'unexpected call to parse_starttag'
- k = match.end(0)
- tag = string.lower(rawdata[i+1:k])
- self.lasttag = tag
- while k < j:
- match = attrfind.match(rawdata, k)
- if not match: break
- attrname, rest, attrvalue = match.group(1, 2, 3)
- if not rest:
- attrvalue = attrname
- elif attrvalue[:1] == '\'' == attrvalue[-1:] or \
- attrvalue[:1] == '"' == attrvalue[-1:]:
- attrvalue = attrvalue[1:-1]
- attrs.append((string.lower(attrname), attrvalue))
- k = match.end(0)
- if rawdata[j] == '>':
- j = j+1
- self.finish_starttag(tag, attrs)
- return j
+ rawdata = self.rawdata
+ if shorttagopen.match(rawdata, i):
+ # SGML shorthand: <tag/data/ == <tag>data</tag>
+ # XXX Can data contain &... (entity or char refs)?
+ # XXX Can data contain < or > (tag characters)?
+ # XXX Can there be whitespace before the first /?
+ match = shorttag.match(rawdata, i)
+ if not match:
+ return -1
+ tag, data = match.group(1, 2)
+ tag = string.lower(tag)
+ self.finish_shorttag(tag, data)
+ k = match.end(0)
+ return k
+ # XXX The following should skip matching quotes (' or ")
+ match = endbracket.search(rawdata, i+1)
+ if not match:
+ return -1
+ j = match.start(0)
+ # Now parse the data between i+1 and j into a tag and attrs
+ attrs = []
+ if rawdata[i:i+2] == '<>':
+ # SGML shorthand: <> == <last open tag seen>
+ k = j
+ tag = self.lasttag
+ else:
+ match = tagfind.match(rawdata, i+1)
+ if not match:
+ raise RuntimeError, 'unexpected call to parse_starttag'
+ k = match.end(0)
+ tag = string.lower(rawdata[i+1:k])
+ self.lasttag = tag
+ while k < j:
+ match = attrfind.match(rawdata, k)
+ if not match: break
+ attrname, rest, attrvalue = match.group(1, 2, 3)
+ if not rest:
+ attrvalue = attrname
+ elif attrvalue[:1] == '\'' == attrvalue[-1:] or \
+ attrvalue[:1] == '"' == attrvalue[-1:]:
+ attrvalue = attrvalue[1:-1]
+ attrs.append((string.lower(attrname), attrvalue))
+ k = match.end(0)
+ if rawdata[j] == '>':
+ j = j+1
+ self.finish_starttag(tag, attrs)
+ return j
# Internal -- parse endtag
def parse_endtag(self, i):
- rawdata = self.rawdata
- match = endbracket.search(rawdata, i+1)
- if not match:
- return -1
- j = match.start(0)
- tag = string.lower(string.strip(rawdata[i+2:j]))
- if rawdata[j] == '>':
- j = j+1
- self.finish_endtag(tag)
- return j
+ rawdata = self.rawdata
+ match = endbracket.search(rawdata, i+1)
+ if not match:
+ return -1
+ j = match.start(0)
+ tag = string.lower(string.strip(rawdata[i+2:j]))
+ if rawdata[j] == '>':
+ j = j+1
+ self.finish_endtag(tag)
+ return j
# Internal -- finish parsing of <tag/data/ (same as <tag>data</tag>)
def finish_shorttag(self, tag, data):
- self.finish_starttag(tag, [])
- self.handle_data(data)
- self.finish_endtag(tag)
+ self.finish_starttag(tag, [])
+ self.handle_data(data)
+ self.finish_endtag(tag)
# Internal -- finish processing of start tag
# Return -1 for unknown tag, 0 for open-only tag, 1 for balanced tag
def finish_starttag(self, tag, attrs):
- try:
- method = getattr(self, 'start_' + tag)
- except AttributeError:
- try:
- method = getattr(self, 'do_' + tag)
- except AttributeError:
- self.unknown_starttag(tag, attrs)
- return -1
- else:
- self.handle_starttag(tag, method, attrs)
- return 0
- else:
- self.stack.append(tag)
- self.handle_starttag(tag, method, attrs)
- return 1
+ try:
+ method = getattr(self, 'start_' + tag)
+ except AttributeError:
+ try:
+ method = getattr(self, 'do_' + tag)
+ except AttributeError:
+ self.unknown_starttag(tag, attrs)
+ return -1
+ else:
+ self.handle_starttag(tag, method, attrs)
+ return 0
+ else:
+ self.stack.append(tag)
+ self.handle_starttag(tag, method, attrs)
+ return 1
# Internal -- finish processing of end tag
def finish_endtag(self, tag):
- if not tag:
- found = len(self.stack) - 1
- if found < 0:
- self.unknown_endtag(tag)
- return
- else:
- if tag not in self.stack:
- try:
- method = getattr(self, 'end_' + tag)
- except AttributeError:
- self.unknown_endtag(tag)
- return
- found = len(self.stack)
- for i in range(found):
- if self.stack[i] == tag: found = i
- while len(self.stack) > found:
- tag = self.stack[-1]
- try:
- method = getattr(self, 'end_' + tag)
- except AttributeError:
- method = None
- if method:
- self.handle_endtag(tag, method)
- else:
- self.unknown_endtag(tag)
- del self.stack[-1]
+ if not tag:
+ found = len(self.stack) - 1
+ if found < 0:
+ self.unknown_endtag(tag)
+ return
+ else:
+ if tag not in self.stack:
+ try:
+ method = getattr(self, 'end_' + tag)
+ except AttributeError:
+ self.unknown_endtag(tag)
+ return
+ found = len(self.stack)
+ for i in range(found):
+ if self.stack[i] == tag: found = i
+ while len(self.stack) > found:
+ tag = self.stack[-1]
+ try:
+ method = getattr(self, 'end_' + tag)
+ except AttributeError:
+ method = None
+ if method:
+ self.handle_endtag(tag, method)
+ else:
+ self.unknown_endtag(tag)
+ del self.stack[-1]
# Overridable -- handle start tag
def handle_starttag(self, tag, method, attrs):
- method(attrs)
+ method(attrs)
# Overridable -- handle end tag
def handle_endtag(self, tag, method):
- method()
+ method()
# Example -- report an unbalanced </...> tag.
def report_unbalanced(self, tag):
- if self.verbose:
- print '*** Unbalanced </' + tag + '>'
- print '*** Stack:', self.stack
+ if self.verbose:
+ print '*** Unbalanced </' + tag + '>'
+ print '*** Stack:', self.stack
# Example -- handle character reference, no need to override
def handle_charref(self, name):
- try:
- n = string.atoi(name)
- except string.atoi_error:
- self.unknown_charref(name)
- return
- if not 0 <= n <= 255:
- self.unknown_charref(name)
- return
- self.handle_data(chr(n))
+ try:
+ n = string.atoi(name)
+ except string.atoi_error:
+ self.unknown_charref(name)
+ return
+ if not 0 <= n <= 255:
+ self.unknown_charref(name)
+ return
+ self.handle_data(chr(n))
# Definition of entities -- derived classes may override
entitydefs = \
- {'lt': '<', 'gt': '>', 'amp': '&', 'quot': '"', 'apos': '\''}
+ {'lt': '<', 'gt': '>', 'amp': '&', 'quot': '"', 'apos': '\''}
# Example -- handle entity reference, no need to override
def handle_entityref(self, name):
- table = self.entitydefs
- if table.has_key(name):
- self.handle_data(table[name])
- else:
- self.unknown_entityref(name)
- return
+ table = self.entitydefs
+ if table.has_key(name):
+ self.handle_data(table[name])
+ else:
+ self.unknown_entityref(name)
+ return
# Example -- handle data, should be overridden
def handle_data(self, data):
- pass
+ pass
# Example -- handle comment, could be overridden
def handle_comment(self, data):
- pass
+ pass
# To be overridden -- handlers for unknown objects
def unknown_starttag(self, tag, attrs): pass
@@ -358,87 +358,87 @@ class SGMLParser:
class TestSGMLParser(SGMLParser):
def __init__(self, verbose=0):
- self.testdata = ""
- SGMLParser.__init__(self, verbose)
+ self.testdata = ""
+ SGMLParser.__init__(self, verbose)
def handle_data(self, data):
- self.testdata = self.testdata + data
- if len(`self.testdata`) >= 70:
- self.flush()
+ self.testdata = self.testdata + data
+ if len(`self.testdata`) >= 70:
+ self.flush()
def flush(self):
- data = self.testdata
- if data:
- self.testdata = ""
- print 'data:', `data`
+ data = self.testdata
+ if data:
+ self.testdata = ""
+ print 'data:', `data`
def handle_comment(self, data):
- self.flush()
- r = `data`
- if len(r) > 68:
- r = r[:32] + '...' + r[-32:]
- print 'comment:', r
+ self.flush()
+ r = `data`
+ if len(r) > 68:
+ r = r[:32] + '...' + r[-32:]
+ print 'comment:', r
def unknown_starttag(self, tag, attrs):
- self.flush()
- if not attrs:
- print 'start tag: <' + tag + '>'
- else:
- print 'start tag: <' + tag,
- for name, value in attrs:
- print name + '=' + '"' + value + '"',
- print '>'
+ self.flush()
+ if not attrs:
+ print 'start tag: <' + tag + '>'
+ else:
+ print 'start tag: <' + tag,
+ for name, value in attrs:
+ print name + '=' + '"' + value + '"',
+ print '>'
def unknown_endtag(self, tag):
- self.flush()
- print 'end tag: </' + tag + '>'
+ self.flush()
+ print 'end tag: </' + tag + '>'
def unknown_entityref(self, ref):
- self.flush()
- print '*** unknown entity ref: &' + ref + ';'
+ self.flush()
+ print '*** unknown entity ref: &' + ref + ';'
def unknown_charref(self, ref):
- self.flush()
- print '*** unknown char ref: &#' + ref + ';'
+ self.flush()
+ print '*** unknown char ref: &#' + ref + ';'
def close(self):
- SGMLParser.close(self)
- self.flush()
+ SGMLParser.close(self)
+ self.flush()
def test(args = None):
import sys
if not args:
- args = sys.argv[1:]
+ args = sys.argv[1:]
if args and args[0] == '-s':
- args = args[1:]
- klass = SGMLParser
+ args = args[1:]
+ klass = SGMLParser
else:
- klass = TestSGMLParser
+ klass = TestSGMLParser
if args:
- file = args[0]
+ file = args[0]
else:
- file = 'test.html'
+ file = 'test.html'
if file == '-':
- f = sys.stdin
+ f = sys.stdin
else:
- try:
- f = open(file, 'r')
- except IOError, msg:
- print file, ":", msg
- sys.exit(1)
+ try:
+ f = open(file, 'r')
+ except IOError, msg:
+ print file, ":", msg
+ sys.exit(1)
data = f.read()
if f is not sys.stdin:
- f.close()
+ f.close()
x = klass()
for c in data:
- x.feed(c)
+ x.feed(c)
x.close()
generated by cgit v0.12 at 2024-11-24 13:57:54 (GMT)