├── .gitignore ├── AUTHORS ├── HISTORICAL ├── LICENSE ├── MANIFEST.in ├── README.md ├── README.rst ├── bin ├── query └── readability ├── boilerpipy ├── __init__.py ├── common.py ├── compat.py ├── error.py └── expressions.py └── setup.py /.gitignore: -------------------------------------------------------------------------------- 1 | *.pyc 2 | *~ 3 | build 4 | boilerpipy.egg-info 5 | dist -------------------------------------------------------------------------------- /AUTHORS: -------------------------------------------------------------------------------- 1 | List of Authors: 2 | ================= 3 | 1. Sharmila Gopirajan - sharmila.gopirajan@gmail.com (Original Author) 4 | 2. Harshavardhana - harsha@harshavardhana.net (Current Maintainer/Author) 5 | -------------------------------------------------------------------------------- /HISTORICAL: -------------------------------------------------------------------------------- 1 | Hi Sharmila, 2 | 3 | This email is about reaching out to you to get maintainer ship of your project 4 | on readability, to a newly revamped code base on github.com written by me. 5 | 6 | The project i am referring to is --> https://code.google.com/p/decruft/ 7 | 8 | I am writing down the AUTHOR file and README.md you as the Original Author, 9 | but i request your consent that i will move forward to maintain this project 10 | in the long run and changing the copyright to my own needs. 11 | 12 | While i have sufficiently improved upon your project -> to support the new 13 | readability.js codebase and also a complete restructuring of the project. Also 14 | adding new techniques to improve upon accuracy in terms of readability 15 | applied on various corpus of websites. 16 | 17 | This repo will also have other changes from boilerpipe project - 18 | https://code.google.com/p/boilerpipe/ which is written in java. 19 | I am planning to write the whole project into Python which will 20 | succeed your work. 21 | 22 | Let me know if this is acceptable for ownership change and also 23 | Copyright change, feel free to visit 24 | https://github.com/harshavardhana/boilerpipy and poke around. 25 | 26 | Thank you :-) 27 | 28 | -Harsha -------------------------------------------------------------------------------- /LICENSE: -------------------------------------------------------------------------------- 1 | 2 | Apache License 3 | Version 2.0, January 2004 4 | http://www.apache.org/licenses/ 5 | 6 | TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION 7 | 8 | 1. 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-------------------------------------------------------------------------------- 1 | include LICENSE 2 | include README.md 3 | include AUTHORS -------------------------------------------------------------------------------- /README.md: -------------------------------------------------------------------------------- 1 | Boilerpipy 2 | ====== 3 | 4 | Readability/Boilerpipe extractor in Python, closest port to latest Arc90's readability.js - 1.7.1 5 | 6 | Copyright (C) 2012 Harshavardhana - Current Maintainer/Author 7 | 8 | Licensed under the Apache License, Version 2.0 (the "License"); 9 | you may not use this file except in compliance with the License. 10 | You may obtain a copy of the License at 11 | 12 | http://www.apache.org/licenses/LICENSE-2.0 13 | 14 | Unless required by applicable law or agreed to in writing, software 15 | distributed under the License is distributed on an "AS IS" BASIS, 16 | WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 17 | See the License for the specific language governing permissions and 18 | limitations under the License. 19 | 20 | [![Downloads](https://img.shields.io/pypi/dm/boilerpipy.svg)](https://pypi.python.org/pypi/boilerpipy/) 21 | [![Version](https://img.shields.io/pypi/v/boilerpipy.svg)](https://pypi.python.org/pypi/boilerpipy/) 22 | [![License](https://img.shields.io/pypi/l/boilerpipy.svg)](https://pypi.python.org/pypi/boilerpipy/) 23 | 24 | -------------------------------------------------------------------------------- /README.rst: -------------------------------------------------------------------------------- 1 | Boilerpipy 2 | ====== 3 | 4 | Readability/Boilerpipe extractor in Python, closest port to latest Arc90's readability.js - 1.7.1 5 | 6 | Copyright (C) 2012 Harshavardhana - Current Maintainer/Author 7 | 8 | Licensed under the Apache License, Version 2.0 (the "License"); 9 | you may not use this file except in compliance with the License. 10 | You may obtain a copy of the License at 11 | 12 | http://www.apache.org/licenses/LICENSE-2.0 13 | 14 | Unless required by applicable law or agreed to in writing, software 15 | distributed under the License is distributed on an "AS IS" BASIS, 16 | WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 17 | See the License for the specific language governing permissions and 18 | limitations under the License. 19 | -------------------------------------------------------------------------------- /bin/query: -------------------------------------------------------------------------------- 1 | #!/usr/bin/env python 2 | import sys 3 | import logging 4 | import chardet 5 | 6 | 7 | from optparse import OptionParser 8 | 9 | from boilerpipy import (Extractor, isvalidhtml, 10 | compat_urllib_request) 11 | 12 | def main(): 13 | parser = OptionParser(usage="%prog: [options] [file]") 14 | parser.add_option('-u', '--url', help="use URL instead of a local file") 15 | parser.add_option('-q', '--query', help="query should be a string") 16 | parser.add_option('-d', help="enable debug", action="store_true", default=False, dest="debug") 17 | (options, args) = parser.parse_args() 18 | 19 | if not (options.url and options.query): 20 | parser.print_help() 21 | sys.exit(1) 22 | 23 | loglevel = logging.INFO 24 | if options.debug: 25 | loglevel = logging.DEBUG 26 | 27 | url = None 28 | if options.url: 29 | if not isvalidhtml(options.url): 30 | print "Unrecognized URL, please provide a content-type of text/html" 31 | sys.exit(255) 32 | 33 | url = compat_urllib_request.urlopen(options.url) 34 | try: 35 | content = url.read() 36 | try: 37 | enc = chardet.detect(content)['encoding'] 38 | content = content.decode(enc) 39 | except: 40 | pass 41 | out = Extractor(content, tag=options.query, loglevel=loglevel).query() 42 | if out is None: 43 | raise 44 | 45 | print out 46 | 47 | except Exception as err: 48 | print "Error in printing the extracted html () %s" % err 49 | 50 | finally: 51 | url.close() 52 | 53 | if __name__ == '__main__': 54 | main() 55 | -------------------------------------------------------------------------------- /bin/readability: -------------------------------------------------------------------------------- 1 | #!/usr/bin/env python 2 | import sys 3 | import logging 4 | import chardet 5 | 6 | from optparse import OptionParser 7 | 8 | from boilerpipy import (Extractor, isvalidhtml, 9 | compat_urllib_request) 10 | 11 | def main(): 12 | parser = OptionParser(usage="%prog: [options] [file]") 13 | parser.add_option('-u', '--url', help="use URL instead of a local file") 14 | parser.add_option('-d', help="enable debug", action="store_true", 15 | default=False, dest="debug") 16 | (options, args) = parser.parse_args() 17 | 18 | if not options.url: 19 | parser.print_help() 20 | sys.exit(1) 21 | 22 | loglevel = logging.INFO 23 | if options.debug: 24 | loglevel = logging.DEBUG 25 | 26 | url = None 27 | if options.url: 28 | if not isvalidhtml(options.url): 29 | print ("Unrecognized URL, please provide a content-type of text/html") 30 | sys.exit(255) 31 | 32 | url = compat_urllib_request.urlopen(options.url) 33 | try: 34 | content = url.read() 35 | try: 36 | enc = chardet.detect(content)['encoding'] 37 | content = content.decode(enc) 38 | except: 39 | pass 40 | out = Extractor(content, loglevel=loglevel).extracted() 41 | if out is None: 42 | raise 43 | print (out.encode('utf-8','ignore')) 44 | 45 | except Exception as err: 46 | print ("Error in printing the extracted html () %s" % err) 47 | 48 | finally: 49 | url.close() 50 | 51 | if __name__ == '__main__': 52 | main() 53 | -------------------------------------------------------------------------------- /boilerpipy/__init__.py: -------------------------------------------------------------------------------- 1 | # -*- coding: utf-8 -*- 2 | import re 3 | import sys 4 | 5 | from collections import defaultdict 6 | 7 | from lxml.etree import (tostring, tounicode, ParserError, 8 | iterwalk, XMLSyntaxError) 9 | from lxml.html.clean import Cleaner 10 | import lxml.html as html 11 | 12 | from .expressions import * 13 | from .common import * 14 | from .error import * 15 | from .compat import * 16 | 17 | import logging 18 | FORMAT = '%(asctime)-15s %(message)s' 19 | logging.basicConfig(format=FORMAT, datefmt='%Y-%m-%d %H:%M:%S') 20 | logger = logging.getLogger('extractor') 21 | # Default 22 | logger.setLevel(logging.INFO) 23 | __version__ = "0.2.2" 24 | __license__ = "Apache 2.0" 25 | 26 | def setLogLevel(level): 27 | if not isinstance(level, int): 28 | raise ValueError 29 | logger.setLevel(level) 30 | 31 | class Extractor: 32 | def __init__(self, input, notify=None, tag=None, **options): 33 | self.input = input 34 | self.options = defaultdict(lambda: None) 35 | for k, v in list(options.items()): 36 | self.options[k] = v 37 | self.notify = notify or logger.debug 38 | self.html = None 39 | self.TEXT_LENGTH_THRESHOLD = 25 40 | self.RETRY_LENGTH = 250 41 | if 'loglevel' in options: 42 | setLogLevel(self.options['loglevel']) 43 | self.tag = tag 44 | 45 | def normalize_html(self, force=False): 46 | # Use lxml 'Cleaner' class to normalize html to a feasible value 47 | if force or self.html is None: 48 | cleaner = Cleaner(scripts=True, javascript=True, comments=True, 49 | style=True, links=True, meta=False, 50 | add_nofollow=False, page_structure=False, 51 | processing_instructions=True, embedded=False, 52 | frames=False, forms=False, annoying_tags=False, 53 | remove_tags=None, remove_unknown_tags=False, 54 | safe_attrs_only=False) 55 | if isinstance(self.input, COMPAT_STR): 56 | # Work around: ValueError: Unicode strings with encoding 57 | # declaration are not supported by lxml 58 | self.input = self.input.encode('utf-8') 59 | self.input = self.input.replace(b'\r', b'') 60 | self.html = parse(cleaner.clean_html(self.input), 61 | self.options['url'], notify=self.notify) 62 | return self.html 63 | 64 | def content(self): 65 | return get_body(self.normalize_html()) 66 | 67 | def title(self): 68 | return get_title(self.normalize_html()) 69 | 70 | def query(self): 71 | if self.tag is None: 72 | raise ValueError('Please provide tag value before calling this function') 73 | 74 | return get_queried_tags(self.normalize_html(), self.tag) 75 | 76 | def extracted(self): 77 | try: 78 | single_pass = True 79 | while True: 80 | self.normalize_html(True) 81 | [i.drop_tree() for i in self.tags(self.html, 'script', 82 | 'style', 'noscript')] 83 | 84 | if single_pass: 85 | self.remove_unlikely_nodes() 86 | 87 | self.transform_misused_divs_into_paragraphs() 88 | nodes = self.score_paragraphs(self.options.get('min_text_length', 89 | self.TEXT_LENGTH_THRESHOLD)) 90 | 91 | best_node = self.select_best_node(nodes) 92 | if best_node: 93 | article = self.get_article(nodes, best_node) 94 | else: 95 | if single_pass: 96 | single_pass = False 97 | logger.info("Ended up stripping too much - going for a safer parsing scheme") 98 | # try again 99 | continue 100 | else: 101 | logger.info("Ruthless and simple parsing did not work. Returning unprocessed raw html") 102 | if self.html.find('body') is not None: 103 | article = self.html.find('body') 104 | else: 105 | article = self.html 106 | 107 | content_scores = [] 108 | 109 | for x in nodes: 110 | if nodes[x]['content_score'] < 0: 111 | continue 112 | content_scores.append(nodes[x]['content_score']) 113 | 114 | cleaned_article = self.sanitize(article, nodes) 115 | at_acceptable_length = len(cleaned_article) >= self.RETRY_LENGTH 116 | 117 | if single_pass and not at_acceptable_length: 118 | single_pass = False 119 | continue # try again 120 | else: 121 | return cleaned_article 122 | except ParserError as e: 123 | logger.info('error getting summary: %s' % e) 124 | return None 125 | 126 | except XMLSyntaxError as e: 127 | logger.info('error getting summary: %s' % e) 128 | return None 129 | 130 | except: 131 | logger.info('unexpected error: %s' % sys.exc_info()[0]) 132 | return None 133 | 134 | def get_article(self, nodes, best_node): 135 | # Now that we have the top node, look through its siblings for content that might also be related. 136 | # Things like preambles, content split by ads that we removed, etc. 137 | 138 | sibling_score_threshold = max([10, best_node['content_score'] * 0.2]) 139 | output = parse("
") 140 | for sibling in best_node['elem'].getparent().getchildren(): 141 | append = False 142 | if sibling is best_node['elem']: 143 | append = True 144 | sibling_key = sibling 145 | if sibling_key in nodes and nodes[sibling_key]['content_score'] >= sibling_score_threshold: 146 | append = True 147 | 148 | if sibling.tag == "p": 149 | link_density = self.get_link_density(sibling) 150 | node_content = sibling.text or "" 151 | node_length = len(node_content) 152 | 153 | if node_length > 80 and link_density < 0.25: 154 | append = True 155 | elif node_length < 80 and link_density == 0 and re.search(r'\.( |$)', node_content): 156 | append = True 157 | 158 | if append: 159 | output.append(sibling) 160 | if output is not None: output.append(best_node['elem']) 161 | return output 162 | 163 | def select_best_node(self, nodes): 164 | sorted_nodes = sorted(list(nodes.values()), 165 | key=lambda x: x['content_score'], reverse=True) 166 | logger.debug("Top 5 nodes:") 167 | for node in sorted_nodes[:5]: 168 | elem = node['elem'] 169 | logger.debug("Node %s with score %s '%s...'" % (describe(elem), 170 | node['content_score'], 171 | snippet(elem))) 172 | 173 | if len(sorted_nodes) == 0: 174 | return None 175 | best_node = sorted_nodes[0] 176 | logger.debug("Best node %s with score %s" % (describe(best_node['elem']), 177 | best_node['content_score'])) 178 | return best_node 179 | 180 | def get_link_density(self, elem): 181 | link_length = len("".join([i.text_content() or "" for i in elem.findall(".//a")])) 182 | text_length = len(elem.text_content()) 183 | return float(link_length) / max(text_length, 1) 184 | 185 | def score_paragraphs(self, min_text_length): 186 | nodes = {} 187 | logger.debug(str([describe(node) for node in self.tags(self.html, 188 | "div")])) 189 | elems = self.tags(self.html, "div", "p", "td", 'li', "a") 190 | 191 | for elem in elems: 192 | parent_node = elem.getparent() 193 | grand_parent_node = parent_node.getparent() 194 | elem_key = elem 195 | parent_key = parent_node 196 | grand_parent_key = grand_parent_node 197 | 198 | inner_text = elem.text_content() 199 | 200 | # If this paragraph is less than 25 characters, don't even count it. 201 | if (not inner_text) or len(inner_text) < min_text_length: 202 | continue 203 | 204 | if parent_key not in nodes: 205 | nodes[parent_key] = self.score_node(parent_node) 206 | if grand_parent_node is not None and grand_parent_key not in nodes: 207 | nodes[grand_parent_key] = self.score_node(grand_parent_node) 208 | 209 | content_score = 1 210 | content_score += len(inner_text.split(',')) 211 | content_score += min([(len(inner_text) / 100), 3]) 212 | if elem not in nodes: 213 | nodes[elem_key] = self.score_node(elem) 214 | nodes[elem_key]['content_score'] += content_score 215 | nodes[parent_key]['content_score'] += content_score 216 | if grand_parent_node is not None: 217 | nodes[grand_parent_key]['content_score'] += content_score / 2.0 218 | 219 | # Scale the final nodes score based on link density. Good content should have a 220 | # relatively small link density (5% or less) and be mostly unaffected by this operation. 221 | for elem, node in list(nodes.items()): 222 | link_density = self.get_link_density(elem) 223 | node['content_score'] *= (1 - link_density) 224 | if node['content_score'] > 0: 225 | logger.debug("node %s scored %s" 226 | "(linkd: %s) '%s'" % (describe(elem), 227 | node['content_score'], 228 | link_density, 229 | snippet(elem, 30))) 230 | 231 | return nodes 232 | 233 | def class_weight(self, e): 234 | weight = 0 235 | if e.get('class', None): 236 | if REGEXPS.get('negative').search(e.get('class')): 237 | weight -= 25 238 | 239 | if REGEXPS.get('positive').search(e.get('class')): 240 | weight += 25 241 | 242 | if e.get('id', None): 243 | if REGEXPS.get('negative').search(e.get('id')): 244 | weight -= 25 245 | 246 | if REGEXPS.get('positive').search(e.get('id')): 247 | weight += 25 248 | 249 | return weight 250 | 251 | def score_node(self, elem): 252 | content_score = self.class_weight(elem) 253 | tag = elem.tag.lower() 254 | if tag == "div": 255 | content_score += 5 256 | elif tag == "blockquote": 257 | content_score += 3 258 | elif tag == "form": 259 | content_score -= 3 260 | elif tag == "th": 261 | content_score -= 5 262 | return {'content_score': content_score, 'elem': elem} 263 | 264 | def remove_unlikely_nodes(self): 265 | remove_list = [] 266 | context = iterwalk(self.html) 267 | for action, elem in context: 268 | s = "%s%s" % (elem.get('class', ''), elem.get('id', '')) 269 | if REGEXPS['unlikelyNodes'].search(s) and (not REGEXPS['okMaybeItsANode'].search(s)) and elem.tag != 'body': 270 | logger.debug("Removing unlikely node - %s" % s) 271 | remove_list.append(elem) 272 | [e.drop_tree() for e in remove_list if e.tag != 'html'] 273 | 274 | def transform_misused_divs_into_paragraphs(self): 275 | for elem in self.html.iter(): 276 | if elem.tag.lower() == "div": 277 | # transform
s that do not contain other block elements into

s 278 | if not REGEXPS['divToPElements'].search(COMPAT_STR(''.join(map(tounicode, list(elem))))): 279 | logger.debug("Altering div(#%s.%s) to p" % (elem.get('id', ''), 280 | elem.get('class', ''))) 281 | elem.tag = "p" 282 | 283 | def tags(self, node, *tag_names): 284 | for tag_name in tag_names: 285 | for e in node.findall('.//%s' %tag_name): 286 | yield e 287 | 288 | def sanitize(self, node, nodes): 289 | for header in self.tags(node, "h1", "h2", "h3", "h4", "h5", "h6"): 290 | if self.class_weight(header) < 0 or self.get_link_density(header) > 0.33: header.drop_tree() 291 | 292 | for elem in self.tags(node, "form"): 293 | elem.drop_tree() 294 | allowed = {} 295 | # Conditionally clean s,
    s, and
    s 296 | for el in self.tags(node, "table", "ul", "div"): 297 | if el in allowed: 298 | continue 299 | weight = self.class_weight(el) 300 | el_key = el 301 | if el_key in nodes: 302 | content_score = nodes[el_key]['content_score'] 303 | else: 304 | content_score = 0 305 | 306 | tag = el.tag 307 | if weight + content_score < 0: 308 | el.drop_tree() 309 | logger.debug("Conditionally cleaned %s with weight %s and content score %s because score + content score was less than zero." % 310 | (describe(el), weight, content_score)) 311 | elif len(el.text_content().split(",")) < 10: 312 | counts = {} 313 | for kind in ['p', 'img', 'li', 'a', 'embed', 'input', 'iframe']: 314 | counts[kind] = len(el.findall('.//%s' % kind)) 315 | counts["li"] -= 100 316 | 317 | content_length = len(el.text_content()) # Count the text length excluding any surrounding whitespace 318 | link_density = self.get_link_density(el) 319 | parent_node = el.getparent() 320 | if parent_node is not None: 321 | if parent_node in nodes: 322 | content_score = nodes[parent_node]['content_score'] 323 | else: 324 | content_score = 0 325 | pweight = self.class_weight(parent_node) + content_score 326 | pname = parent_node.tag 327 | else: 328 | pweight = 0 329 | pname = "no parent" 330 | to_remove = False 331 | reason = "" 332 | 333 | if counts["p"] and counts["img"] > counts["p"]: 334 | reason = "too many images" 335 | to_remove = True 336 | elif counts["li"] > counts["p"] and tag != "ul" and tag != "ol": 337 | reason = "more
  • s than

    s" 338 | to_remove = True 339 | elif counts["input"] > (counts["p"] / 3): 340 | reason = "less than 3x

    s than s" 341 | to_remove = True 342 | elif content_length < (self.options.get('min_text_length', 343 | self.TEXT_LENGTH_THRESHOLD)) and (counts["img"] == 0): 344 | reason = "too short a content length without a single image" 345 | to_remove = True 346 | elif weight < 25 and link_density > 0.2: 347 | reason = "too many links for its weight less than 25 (#{weight})" 348 | to_remove = True 349 | elif weight >= 25 and link_density > 0.5: 350 | reason = "too many links for its weight (#{weight})" 351 | to_remove = True 352 | elif el.tag.lower() == "embed": 353 | if not REGEXPS.get('videos').search(el.get('src')): 354 | to_remove = True 355 | elif el.tag.lower() == "iframe": 356 | if not REGEXPS.get('videos').search(el.get('src')): 357 | to_remove = True 358 | elif (counts["embed"] == 1 and content_length < 75) or counts["embed"] > 2: 359 | reason = "s with too short a content length, or too many s" 360 | to_remove = True 361 | elif (counts["iframe"] == 1 and content_length < 75) or counts["iframe"] > 2: 362 | reason = "