X-Git-Url: https://git.phdru.name/?a=blobdiff_plain;f=Robots%2Fparse_html.py;h=5e8061c793e307b0fad3d1163bf3b122884d185c;hb=c26ca363d27b778a96f7d292dabd5258f307b693;hp=350ad789b5fa34592db37ce6e097de98e8b8dd6a;hpb=62977582003da9f434cd4fd377837935b6f0520c;p=bookmarks_db.git diff --git a/Robots/parse_html.py b/Robots/parse_html.py index 350ad78..5e8061c 100755 --- a/Robots/parse_html.py +++ b/Robots/parse_html.py @@ -1,137 +1,164 @@ -#! /usr/local/bin/python -O +#! /usr/bin/env python """ - HTML Parser + HTML Parsers wrapper - Written by BroytMann. Copyright (C) 1997-2005 PhiloSoft Design + Written by Broytman. Copyright (C) 1997-2010 PhiloSoft Design """ +import codecs -import sys -current_charset = sys.getdefaultencoding() -if current_charset == "ascii": - try: - import locale - except ImportError: - pass - else: - current_charset = locale.getpreferredencoding() -current_charset = current_charset.replace("windows-", "cp").lower() +universal_charset = "utf-8" DEFAULT_CHARSET = "cp1251" # Stupid default for Russian Cyrillic - -from HTMLParser import HTMLParseError -from m_lib.net.www.html import HTMLParser as _HTMLParser - - -class HTMLHeadDone(Exception): pass - - -class HTMLParser(_HTMLParser): - def __init__(self, charset=None): - _HTMLParser.__init__(self) - self.charset = charset - self.meta_charset = 0 - self.title = '' - self.refresh = '' - - def end_head(self): - raise HTMLHeadDone() - - - def do_meta(self, attrs): - http_equiv = "" - content = "" - - for attrname, value in attrs: - if value: - value = value.strip() - if attrname == 'http-equiv': - http_equiv = value.lower() - elif attrname == 'content': - content = value - - if (not self.charset) and (http_equiv == "content-type"): - try: - # extract charset from "text/html; foo; charset=UTF-8; bar;" - self.charset = content.lower().split('charset=')[1].split(';')[0] - self.meta_charset = 1 # Remember that the charset was retrieved from - # META tag, not from the Content-Type header - except IndexError: - pass - - if http_equiv == "refresh": - self.refresh = content - - - def start_title(self, attrs): - self.accumulator = '' - - def end_title(self): - if not self.title: # use only the first title - self.title = self.accumulator +parsers = [] + +try: + from parse_html_lxml import parse_html +except ImportError: + pass +else: + parsers.append(parse_html) + +try: + import parse_html_beautifulsoup + parse_html_beautifulsoup.DEFAULT_CHARSET = DEFAULT_CHARSET +except ImportError: + pass +else: + parsers.append(parse_html_beautifulsoup.parse_html) + +try: + from parse_html_htmlparser import parse_html +except ImportError: + pass +else: + parsers.append(parse_html) + +try: + import parse_html_html5 +except ImportError: + pass +else: + parsers.append(parse_html_html5.parse_html) import re -entity_re = re.compile("(&#[0-9]+;)") +from htmlentitydefs import name2codepoint + +entity_re = re.compile("(&\w+;)") +num_entity_re = re.compile("(&#[0-9]+;)") def recode_entities(title, charset): output = [] for part in entity_re.split(title): - if entity_re.match(part): - part = unichr(int(part[2:-1])).encode(charset, "replace") + if part not in ("&", "<", ">", """) and \ + entity_re.match(part): + _part = name2codepoint.get(part[1:-1], None) + if _part is not None: + part = unichr(_part).encode(charset) + output.append(part) + title = ''.join(output) + + output = [] + for part in num_entity_re.split(title): + if num_entity_re.match(part): + try: + part = unichr(int(part[2:-1])).encode(charset) + except UnicodeEncodeError: + pass # Leave the entity as is output.append(part) return ''.join(output) def parse_html(filename, charset=None, log=None): - infile = open(filename, 'r') - parser = HTMLParser(charset) + if not parsers: + return None - for line in infile: + if charset: try: - parser.feed(line) - except (HTMLParseError, HTMLHeadDone): + codecs.lookup(charset) # In case of unknown charset... + except (ValueError, LookupError): + charset = None # ...try charset from HTML + + charsets = [universal_charset, DEFAULT_CHARSET] + if charset: + charset = charset.lower().replace("windows-", "cp") + if charset in charsets: + charsets.remove(charset) + charsets.insert(0, charset) + + for p in parsers: + parser = None + for c in charsets: + try: + parser = p(filename, c, log) + break + except UnicodeEncodeError: + pass + if parser: break + else: + if log: log("Parser %s.%s failed, trying next one." % (p.__module__, p.__name__)) - infile.close() + if not parser: + return None - try: - parser.close() - except (HTMLParseError, HTMLHeadDone): - pass - - title = parser.title - - if not parser.charset: + converted_title = title = parser.title + if title and (not parser.charset): try: unicode(title, "ascii") except UnicodeDecodeError: parser.charset = DEFAULT_CHARSET if parser.charset: - parser.charset = parser.charset.replace("windows-", "cp").lower() + parser.charset = parser.charset.lower().replace("windows-", "cp") - if parser.charset and (parser.charset <> current_charset): + if title and parser.charset and ( + (parser.charset <> universal_charset) or + ((not charset) or (charset <> parser.charset))): try: if parser.meta_charset: if log: log(" META charset : %s" % parser.charset) - else: - if log: log(" charset : %s" % parser.charset) + elif (not charset) or (charset <> parser.charset): + if log: log(" guessed charset: %s" % parser.charset) + if log: log(" current charset: %s" % universal_charset) if log: log(" title : %s" % title) - title = unicode(title, parser.charset, "replace").encode(current_charset, "replace") - if log: log(" current charset: %s" % current_charset) - if log: log(" converted title: %s" % title) + if parser.charset <> universal_charset: + try: + converted_title = unicode(title, parser.charset).encode(universal_charset) + except UnicodeError: + if log: log(" incorrect conversion from %s, converting from %s" % (parser.charset, DEFAULT_CHARSET)) + converted_title = unicode(title, DEFAULT_CHARSET, "replace").encode(universal_charset, "replace") + parser.charset = DEFAULT_CHARSET + if log and (converted_title <> title): log(" converted title: %s" % converted_title) except LookupError: - if log: log(" unknown charset: `%s' or `%s'" % (parser.charset, current_charset)) - - parser.title = recode_entities(title, current_charset) + if log: log(" unknown charset: '%s'" % parser.charset) + else: + if log: log(" title : %s" % title) + + if title: + final_title = recode_entities(converted_title, universal_charset) + parts = [s.strip() for s in final_title.replace('\r', '').split('\n')] + final_title = ' '.join([s for s in parts if s]) + if log and (final_title <> converted_title): log(" final title : %s" % final_title) + parser.title = final_title return parser if __name__ == '__main__': import sys - parser = parse_html(sys.argv[1]) - print parser.charset - print parser.title - print parser.refresh + + l = len(sys.argv) + if l == 3: + filename = sys.argv[1] + charset = sys.argv[2] + elif l == 2: + filename = sys.argv[1] + charset = universal_charset + else: + sys.exit("Usage: %s filename [charset]" % sys.argv[0]) + + parser = parse_html(filename, charset, log=lambda s: sys.stdout.write(s + '\n')) + print " refresh:", parser.refresh + print " icon :", parser.icon