| 1 |
# Check Interwiki Links |
| 2 |
# by iritscen@yahoo.com |
| 3 |
# Looks at each link on a page (or all the pages in a category) which uses a registered |
| 4 |
# interwiki prefix and loads the linked page, verifying that it exists and that any section |
| 5 |
# link, if present, is valid as well. The output will use the word "ERROR" when it cannot |
| 6 |
# validate the interwiki link. |
| 7 |
# Recommended viewing width: |
| 8 |
# |---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---| |
| 9 |
|
| 10 |
import bs4 |
| 11 |
import pywikibot |
| 12 |
import re |
| 13 |
import requests # for listing members with dir() when debugging |
| 14 |
|
| 15 |
from bs4 import BeautifulSoup |
| 16 |
from pywikibot import pagegenerators |
| 17 |
from pywikibot.bot import QuitKeyboardInterrupt |
| 18 |
from pywikibot.comms.http import fetch |
| 19 |
from pywikibot.specialbots import UploadRobot |
| 20 |
from pywikibot.tools.formatter import color_format |
| 21 |
from urllib.parse import urljoin |
| 22 |
|
| 23 |
class IWLink: |
| 24 |
def __init__(self, iw_prefix, prefix_url, full_url, page_name, page_slug, curl_response): |
| 25 |
self.iw_prefix = iw_prefix # e.g. "wp" |
| 26 |
self.prefix_url = prefix_url # e.g. "https://en.wikipedia.org/wiki/" |
| 27 |
self.full_url = full_url # e.g. "https://en.wikipedia.org/wiki/Easter_egg" |
| 28 |
self.page_name = page_name # "Easter egg" |
| 29 |
self.page_slug = page_slug # "Easter_egg" |
| 30 |
self.curl_response = curl_response # a class defined in the Requests library |
| 31 |
|
| 32 |
# Parallel arrays based on https://wiki.oni2.net/Special:Interwiki |
| 33 |
interwiki_prefixes = ('acronym', 'cache', 'commons', 'dictionary', 'google', 'metawikimedia', 'mw', 'wikibooks', 'wikidata', 'wikimedia', 'wikinews', 'wikipedia', 'wikiquote', 'wikisource', 'wikispecies', 'wikiversity', 'wikivoyage', 'wikt', 'wiktionary', 'wp') |
| 34 |
|
| 35 |
interwiki_urls = ('http://www.acronymfinder.com/~/search/af.aspx?string=exact&Acronym=', 'http://www.google.com/search?q=cache:', 'https://commons.wikimedia.org/wiki/', 'http://www.dict.org/bin/Dict?Database=*&Form=Dict1&Strategy=*&Query=', 'http://www.google.com/search?q=', 'https://meta.wikimedia.org/wiki/', 'https://www.mediawiki.org/wiki/', 'https://en.wikibooks.org/wiki/', 'https://www.wikidata.org/wiki/', 'https://foundation.wikimedia.org/wiki/', 'https://en.wikinews.org/wiki/', 'https://en.wikipedia.org/wiki/', 'https://en.wikiquote.org/wiki/', 'https://wikisource.org/wiki/', 'https://species.wikimedia.org/wiki/', 'https://en.wikiversity.org/wiki/', 'https://en.wikivoyage.org/wiki/', 'https://en.wiktionary.org/wiki/', 'https://en.wiktionary.org/wiki/', 'https://en.wikipedia.org/wiki/') |
| 36 |
|
| 37 |
# Initialize globals |
| 38 |
debug = 0 |
| 39 |
pages_checked = 0 |
| 40 |
iw_found = 0 |
| 41 |
errors_issued = 0 |
| 42 |
unintended_redirects_found = 0 |
| 43 |
name_printed = 0 |
| 44 |
|
| 45 |
# Prints the name of a page on which something occurred, if it has not been printed before |
| 46 |
def possibly_print(page_name): |
| 47 |
global debug |
| 48 |
global name_printed |
| 49 |
|
| 50 |
if not name_printed and not debug: |
| 51 |
pywikibot.stdout('') |
| 52 |
pywikibot.stdout('From page "{}":'.format(page_name)) |
| 53 |
name_printed = 1 |
| 54 |
|
| 55 |
# Search a page for the section specified in the link |
| 56 |
def find_section(the_link, print_result): |
| 57 |
global errors_issued |
| 58 |
|
| 59 |
# Isolate section link |
| 60 |
target_page_name, anchor_name = the_link.page_slug.split('#') |
| 61 |
target_page_name_human = target_page_name.replace('_', ' ') |
| 62 |
|
| 63 |
# Convert dot-notation hex entities to proper characters |
| 64 |
replacements = [(r'\.22', '"'), (r'\.27', "'"), (r'\.28', '('), (r'\.29', ')')] |
| 65 |
for pattern, replacement in replacements: |
| 66 |
anchor_name = re.sub(pattern, replacement, anchor_name) |
| 67 |
|
| 68 |
# Read linked page to see if it really has this anchor link |
| 69 |
soup = BeautifulSoup(the_link.curl_response.text, 'html.parser') |
| 70 |
tags_to_search = ['span', 'div', 'h2', 'h3', 'h4'] |
| 71 |
found_section = False |
| 72 |
for tag_name in tags_to_search: |
| 73 |
for the_tag in soup.find_all(tag_name): |
| 74 |
if the_tag.get('id') == anchor_name: |
| 75 |
found_section = True |
| 76 |
break |
| 77 |
if found_section: |
| 78 |
break |
| 79 |
|
| 80 |
# Tell user what we found |
| 81 |
if found_section == False: |
| 82 |
possibly_print(the_link.page_name) |
| 83 |
pywikibot.stdout(' ERROR: Could not find section "{0}" on {1} page "{2}".'.format(anchor_name, the_link.iw_prefix, target_page_name_human)) |
| 84 |
errors_issued = errors_issued + 1 |
| 85 |
elif print_result == True: |
| 86 |
pywikibot.stdout(' The section "{0}" was found on {1} page "{2}".'.format(anchor_name, the_link.iw_prefix, target_page_name_human)) |
| 87 |
|
| 88 |
# For a link that redirected us to another page, extract the name of the target page from |
| 89 |
# the target page's source |
| 90 |
def find_canonical_link(the_link): |
| 91 |
# Extract link from this markup which contains name of redirected-to page: |
| 92 |
# <link rel="canonical" href="https://en.wikipedia.org/wiki/Page_name"/> |
| 93 |
canonical_name = the_link.curl_response.text.split('<link rel="canonical" href="')[-1] |
| 94 |
prefix_length = len(the_link.prefix_url) |
| 95 |
canonical_name = canonical_name[prefix_length:] |
| 96 |
tag_end = canonical_name.find('">') |
| 97 |
|
| 98 |
if tag_end == -1: |
| 99 |
pywikibot.stdout(' ERROR: The {0} link "{1}" is a redirect page, but this script could not isolate the target page name.'.format(the_link.iw_prefix, the_link.page_slug)) |
| 100 |
errors_issued = errors_issued + 1 |
| 101 |
else: |
| 102 |
canonical_name = canonical_name[:tag_end] |
| 103 |
if len(canonical_name) > 100: |
| 104 |
# Certain things can cause the trim to fail; report error and avoid slamming the |
| 105 |
# output with massive page source from a failed trim |
| 106 |
pywikibot.stdout(' ERROR: The {0} link "{1}" is a redirect to "{2}…" (string overflow).'.format(the_link.iw_prefix, the_link.page_slug, canonical_name[:100])) |
| 107 |
errors_issued = errors_issued + 1 |
| 108 |
else: |
| 109 |
canonical_name = canonical_name.replace('_', ' ') |
| 110 |
if '#' in the_link.page_slug: |
| 111 |
_, anchor_name = the_link.page_slug.split('#') |
| 112 |
pywikibot.stdout(' The {0} link "{1}" is a redirect to "{2}#{3}", which is a valid page. Checking for section on that page….'.format(the_link.iw_prefix, the_link.page_slug, canonical_name, anchor_name)) |
| 113 |
the_link.page_slug = the_link.page_slug.replace(the_link.page_name, canonical_name) # update page slug so that find_section() uses the right page name in its messages |
| 114 |
find_section(the_link, True) |
| 115 |
else: |
| 116 |
pywikibot.stdout(' The {0} link "{1}" is a redirect to "{2}", which is a valid page.'.format(the_link.iw_prefix, the_link.page_slug, canonical_name)) |
| 117 |
|
| 118 |
# Test an interwiki link and look for a section link if applicable |
| 119 |
def test_interwiki_link(the_link): |
| 120 |
global errors_issued |
| 121 |
global unintended_redirects_found |
| 122 |
|
| 123 |
the_link.curl_response = fetch(the_link.full_url) |
| 124 |
|
| 125 |
# One way we tell that a redirect occurred is by checking fetch's history, as it |
| 126 |
# automatically follows redirects. This will catch formal redirects which come from pages |
| 127 |
# such as Special:PermanentLink. |
| 128 |
if the_link.curl_response.history != []: |
| 129 |
possibly_print(the_link.page_name) |
| 130 |
|
| 131 |
# If linked page is in all caps, e.g. WP:BEANS, it's likely a deliberate use of a redirect |
| 132 |
if the_link.page_slug.startswith('WP:') and the_link.page_slug == the_link.page_slug.upper(): |
| 133 |
pywikibot.stdout(' Got redirection code "{0}" for {1} link "{2}". This appears to be a deliberate use of a Wikipedia shortcut. Checking the target page….'.format(the_link.curl_response.history[0], the_link.iw_prefix, the_link.page_slug)) |
| 134 |
find_canonical_link(the_link) |
| 135 |
else: |
| 136 |
permalink1 = 'Special:PermanentLink/'.lower() |
| 137 |
permalink2 = 'Special:Permalink/'.lower() |
| 138 |
page_slug_lower = the_link.page_slug.lower() |
| 139 |
if page_slug_lower.startswith(permalink1) or page_slug_lower.startswith(permalink2): |
| 140 |
pywikibot.stdout(' Got redirection code "{0}" for {1} permanent revision link "{2}". Checking the target page….'.format(the_link.curl_response.history[0], the_link.iw_prefix, the_link.page_slug)) |
| 141 |
find_canonical_link(the_link) |
| 142 |
else: |
| 143 |
pywikibot.stdout(' ERROR: Unrecognized type of redirection (code "{0}") for {1} link "{2}". You should check the link manually.'.format(the_link.curl_response.history[0], the_link.iw_prefix, the_link.page_slug)) |
| 144 |
errors_issued = errors_issued + 1 |
| 145 |
elif the_link.curl_response.status_code != 200: |
| 146 |
possibly_print(the_link.page_name) |
| 147 |
pywikibot.stdout(' ERROR: Got response code {0} for {1} link "{2}". The page may not exist.'.format(the_link.curl_response.status_code, the_link.iw_prefix, the_link.page_slug)) |
| 148 |
errors_issued = errors_issued + 1 |
| 149 |
# However the usual way that a redirect occurs is that MediaWiki redirects us sneakily |
| 150 |
# using JavaScript, while returning code OK 200 as if the link was correct; this happens |
| 151 |
# when a redirect page is accessed. We must detect these soft redirects by looking at the |
| 152 |
# page source to find the redirect note inserted at the top of the page for the reader. |
| 153 |
elif 'Redirected from <a' in the_link.curl_response.text: |
| 154 |
unintended_redirects_found = unintended_redirects_found + 1 |
| 155 |
possibly_print(the_link.page_name) |
| 156 |
pywikibot.stdout(' WARNING: Got silently redirected by {0} link "{1}". Checking the target page….'.format(the_link.iw_prefix, the_link.page_slug)) |
| 157 |
find_canonical_link(the_link) |
| 158 |
elif '#' in the_link.page_slug: |
| 159 |
find_section(the_link, False) |
| 160 |
|
| 161 |
# Searches the given page text for interwiki links |
| 162 |
def scan_for_interwiki_links(page_text, page_name): |
| 163 |
global debug |
| 164 |
global pages_checked |
| 165 |
global iw_found |
| 166 |
global name_printed |
| 167 |
pages_checked = pages_checked + 1 |
| 168 |
cur_prefix = 0 |
| 169 |
name_printed = 0 |
| 170 |
|
| 171 |
for prefix in interwiki_prefixes: |
| 172 |
# Isolate strings that start with "[[prefix:" and end with "|" or "]" |
| 173 |
iw_link = r"\[\[" + prefix + r":[^|\]]*(\||\])" |
| 174 |
for match in re.finditer(iw_link, page_text): |
| 175 |
the_link = IWLink(prefix, interwiki_urls[cur_prefix], "", page_name, "", "") |
| 176 |
|
| 177 |
# Extract just the page title from this regex match |
| 178 |
s = match.start() + 2 + len(the_link.iw_prefix) + 1 |
| 179 |
e = match.end() - 1 |
| 180 |
|
| 181 |
# Commonly we use spaces instead of underscores, so fix that before querying |
| 182 |
the_link.page_slug = page_text[s:e].replace(' ', '_') |
| 183 |
|
| 184 |
# But use spaces for title when printing it |
| 185 |
page_title_human = the_link.page_slug.replace('_', ' ') |
| 186 |
if debug: pywikibot.stdout(' Validating {0} link "{1}"'.format(the_link.iw_prefix, page_title_human)) |
| 187 |
iw_found = iw_found + 1 |
| 188 |
|
| 189 |
# Construct full URL for the particular wiki |
| 190 |
the_link.full_url = the_link.prefix_url + the_link.page_slug |
| 191 |
|
| 192 |
# Adjust URL if this is a foreign-language WP link |
| 193 |
if re.match("^[a-zA-Z]{2}:", the_link.page_slug): |
| 194 |
lang_code = the_link.page_slug[0:2] + "." |
| 195 |
# "wp:" is the Wikipedia: namespace, not a language |
| 196 |
if lang_code != "wp." and lang_code != "WP.": |
| 197 |
the_link.full_url = the_link.full_url.replace('en.', lang_code) |
| 198 |
the_link.full_url = the_link.full_url.replace(the_link.page_slug[0:3], '') |
| 199 |
|
| 200 |
# Test the URL |
| 201 |
test_interwiki_link(the_link) |
| 202 |
cur_prefix = cur_prefix + 1 |
| 203 |
|
| 204 |
# Print a wrap-up message |
| 205 |
def print_summary(): |
| 206 |
global pages_checked |
| 207 |
global iw_found |
| 208 |
global errors_issued |
| 209 |
global unintended_redirects_found |
| 210 |
|
| 211 |
page_str = "pages" |
| 212 |
if pages_checked == 1: |
| 213 |
page_str = "page" |
| 214 |
|
| 215 |
link_str = "links" |
| 216 |
if iw_found == 1: |
| 217 |
link_str = "link" |
| 218 |
|
| 219 |
pywikibot.stdout('Checked {0} {1} and found {2} interwiki {3}.'.format(pages_checked, page_str, iw_found, link_str)) |
| 220 |
|
| 221 |
error_str = "errors were" |
| 222 |
if errors_issued == 1: |
| 223 |
error_str = "error was" |
| 224 |
|
| 225 |
pywikibot.stdout('{0} {1} encountered in validating these links.'.format(errors_issued, error_str)) |
| 226 |
|
| 227 |
warning_str = "likely-unintended redirects were" |
| 228 |
if unintended_redirects_found == 1: |
| 229 |
warning_str = "likely-unintended redirect was" |
| 230 |
|
| 231 |
pywikibot.stdout('{0} {1} encountered in validating these links.'.format(unintended_redirects_found, warning_str)) |
| 232 |
|
| 233 |
# Main function |
| 234 |
def main(*args): |
| 235 |
global debug |
| 236 |
search_cat = '' |
| 237 |
search_page = '' |
| 238 |
|
| 239 |
# Process arguments |
| 240 |
local_args = pywikibot.handle_args(args) |
| 241 |
for arg in local_args: |
| 242 |
if arg.startswith('-cat:'): |
| 243 |
search_cat = arg[5:] |
| 244 |
elif arg.startswith('-page:'): |
| 245 |
search_page = arg[6:] |
| 246 |
elif arg == '-dbg': |
| 247 |
debug = 1 |
| 248 |
else: |
| 249 |
pywikibot.stdout('Unknown argument "{}". Exiting.'.format(arg)) |
| 250 |
return |
| 251 |
|
| 252 |
#pywikibot.stdout('The members of the requests.models.Response class are:') |
| 253 |
#pywikibot.stdout(format(dir(requests.models.Response))) |
| 254 |
#return |
| 255 |
|
| 256 |
# Check specified page or loop through specified category and check all pages |
| 257 |
site = pywikibot.Site() |
| 258 |
if search_cat != '': |
| 259 |
cat_obj = pywikibot.Category(site, search_cat) |
| 260 |
generator = pagegenerators.CategorizedPageGenerator(cat_obj, recurse=True) |
| 261 |
for page in pagegenerators.PreloadingGenerator(generator, 100): |
| 262 |
if debug: pywikibot.stdout('Checking page "{}"'.format(page.title())) |
| 263 |
scan_for_interwiki_links(page.text, page.title()) |
| 264 |
elif search_page != '': |
| 265 |
page = pywikibot.Page(site, search_page) |
| 266 |
if debug: pywikibot.stdout('Checking page "{}"'.format(page.title())) |
| 267 |
scan_for_interwiki_links(page.text, page.title()) |
| 268 |
|
| 269 |
# Print the results |
| 270 |
print_summary() |
| 271 |
|
| 272 |
if __name__ == '__main__': |
| 273 |
main() |
