序幕

安装了反XSS浏览器扩展程序后，Stack Snippets突然停止在整个Stack Exchange网络上正常工作。我再也无法从Stack Overflow中学到东西，无法查看有关用户体验的工作演示，而且最糟糕的是，无法在Programming Puzzles和Code Golf上测试JavaScript答案！拼命地寻找一种补救方法，并在设置中找到一个小的输入框，其中可以放置一个正则表达式。我无法将所有Stack Exchange网站都放在一个小盒子中，因此我寻求帮助。这就是那个问题。

任务

您的任务是创建一个匹配所有Stack Exchange网站URL的正则表达式，而不匹配不属于Stack Overflow Inc.的任何域。

您的正则表达式必须将所有URL与以下部分匹配：

• protocol：这将是http://或https://。

• domain：这将是此列表中的一项：

  stackoverflow.com
  www.stackoverflow.com
  facebook.stackoverflow.com
  serverfault.com
  superuser.com
  meta.stackexchange.com
  webapps.stackexchange.com
  nothingtoinstall.com
  meta.webapps.stackexchange.com
  meta.nothingtoinstall.com
  gaming.stackexchange.com
  arqade.com
  thearqade.com
  meta.gaming.stackexchange.com
  meta.arqade.com
  meta.thearqade.com
  webmasters.stackexchange.com
  webmaster.stackexchange.com
  meta.webmasters.stackexchange.com
  meta.webmaster.stackexchange.com
  cooking.stackexchange.com
  seasonedadvice.com
  meta.cooking.stackexchange.com
  meta.seasonedadvice.com
  gamedev.stackexchange.com
  meta.gamedev.stackexchange.com
  photo.stackexchange.com
  photography.stackexchange.com
  photos.stackexchange.com
  meta.photo.stackexchange.com
  meta.photography.stackexchange.com
  meta.photos.stackexchange.com
  stats.stackexchange.com
  statistics.stackexchange.com
  crossvalidated.com
  meta.stats.stackexchange.com
  meta.statistics.stackexchange.com
  math.stackexchange.com
  maths.stackexchange.com
  mathematics.stackexchange.com
  meta.math.stackexchange.com
  diy.stackexchange.com
  meta.diy.stackexchange.com
  meta.superuser.com
  meta.serverfault.com
  gis.stackexchange.com
  meta.gis.stackexchange.com
  tex.stackexchange.com
  meta.tex.stackexchange.com
  askubuntu.com
  ubuntu.stackexchange.com
  meta.askubuntu.com
  meta.ubuntu.stackexchange.com
  money.stackexchange.com
  basicallymoney.com
  www.basicallymoney.com
  meta.money.stackexchange.com
  english.stackexchange.com
  elu.stackexchange.com
  meta.english.stackexchange.com
  stackapps.com
  ux.stackexchange.com
  ui.stackexchange.com
  meta.ux.stackexchange.com
  meta.ui.stackexchange.com
  unix.stackexchange.com
  linux.stackexchange.com
  meta.unix.stackexchange.com
  meta.linux.stackexchange.com
  wordpress.stackexchange.com
  meta.wordpress.stackexchange.com
  cstheory.stackexchange.com
  meta.cstheory.stackexchange.com
  apple.stackexchange.com
  askdifferent.com
  meta.apple.stackexchange.com
  rpg.stackexchange.com
  meta.rpg.stackexchange.com
  bicycles.stackexchange.com
  bicycle.stackexchange.com
  cycling.stackexchange.com
  bikes.stackexchange.com
  meta.bicycles.stackexchange.com
  meta.bicycle.stackexchange.com
  programmers.stackexchange.com
  programmer.stackexchange.com
  meta.programmers.stackexchange.com
  electronics.stackexchange.com
  chiphacker.com
  www.chiphacker.com
  meta.electronics.stackexchange.com
  android.stackexchange.com
  meta.android.stackexchange.com
  boardgames.stackexchange.com
  boardgame.stackexchange.com
  meta.boardgames.stackexchange.com
  physics.stackexchange.com
  meta.physics.stackexchange.com
  homebrew.stackexchange.com
  homebrewing.stackexchange.com
  brewadvice.com
  meta.homebrew.stackexchange.com
  meta.homebrewing.stackexchange.com
  security.stackexchange.com
  itsecurity.stackexchange.com
  meta.security.stackexchange.com
  meta.itsecurity.stackexchange.com
  writers.stackexchange.com
  writer.stackexchange.com
  writing.stackexchange.com
  meta.writers.stackexchange.com
  video.stackexchange.com
  avp.stackexchange.com
  meta.video.stackexchange.com
  meta.avp.stackexchange.com
  graphicdesign.stackexchange.com
  graphicsdesign.stackexchange.com
  graphicdesigns.stackexchange.com
  meta.graphicdesign.stackexchange.com
  dba.stackexchange.com
  meta.dba.stackexchange.com
  scifi.stackexchange.com
  sciencefiction.stackexchange.com
  fantasy.stackexchange.com
  meta.scifi.stackexchange.com
  codereview.stackexchange.com
  meta.codereview.stackexchange.com
  codegolf.stackexchange.com
  meta.codegolf.stackexchange.com
  quant.stackexchange.com
  meta.quant.stackexchange.com
  pm.stackexchange.com
  meta.pm.stackexchange.com
  skeptics.stackexchange.com
  skeptic.stackexchange.com
  skepticexchange.com
  meta.skeptics.stackexchange.com
  fitness.stackexchange.com
  meta.fitness.stackexchange.com
  drupal.stackexchange.com
  meta.drupal.stackexchange.com
  mechanics.stackexchange.com
  garage.stackexchange.com
  meta.mechanics.stackexchange.com
  meta.garage.stackexchange.com
  parenting.stackexchange.com
  meta.parenting.stackexchange.com
  sharepoint.stackexchange.com
  sharepointoverflow.com
  www.sharepointoverflow.com
  meta.sharepoint.stackexchange.com
  music.stackexchange.com
  guitars.stackexchange.com
  guitar.stackexchange.com
  meta.music.stackexchange.com
  sqa.stackexchange.com
  meta.sqa.stackexchange.com
  judaism.stackexchange.com
  mi.yodeya.com
  yodeya.com
  yodeya.stackexchange.com
  miyodeya.com
  meta.judaism.stackexchange.com
  german.stackexchange.com
  deutsch.stackexchange.com
  meta.german.stackexchange.com
  japanese.stackexchange.com
  meta.japanese.stackexchange.com
  philosophy.stackexchange.com
  meta.philosophy.stackexchange.com
  gardening.stackexchange.com
  landscaping.stackexchange.com
  meta.gardening.stackexchange.com
  travel.stackexchange.com
  meta.travel.stackexchange.com
  productivity.stackexchange.com
  meta.productivity.stackexchange.com
  crypto.stackexchange.com
  cryptography.stackexchange.com
  meta.crypto.stackexchange.com
  meta.cryptography.stackexchange.com
  dsp.stackexchange.com
  signals.stackexchange.com
  meta.dsp.stackexchange.com
  french.stackexchange.com
  meta.french.stackexchange.com
  christianity.stackexchange.com
  meta.christianity.stackexchange.com
  bitcoin.stackexchange.com
  meta.bitcoin.stackexchange.com
  linguistics.stackexchange.com
  linguist.stackexchange.com
  meta.linguistics.stackexchange.com
  hermeneutics.stackexchange.com
  meta.hermeneutics.stackexchange.com
  history.stackexchange.com
  meta.history.stackexchange.com
  bricks.stackexchange.com
  meta.bricks.stackexchange.com
  spanish.stackexchange.com
  espanol.stackexchange.com
  meta.spanish.stackexchange.com
  scicomp.stackexchange.com
  meta.scicomp.stackexchange.com
  movies.stackexchange.com
  meta.movies.stackexchange.com
  chinese.stackexchange.com
  meta.chinese.stackexchange.com
  biology.stackexchange.com
  meta.biology.stackexchange.com
  poker.stackexchange.com
  meta.poker.stackexchange.com
  mathematica.stackexchange.com
  meta.mathematica.stackexchange.com
  cogsci.stackexchange.com
  meta.cogsci.stackexchange.com
  outdoors.stackexchange.com
  meta.outdoors.stackexchange.com
  martialarts.stackexchange.com
  meta.martialarts.stackexchange.com
  sports.stackexchange.com
  meta.sports.stackexchange.com
  academia.stackexchange.com
  academics.stackexchange.com
  meta.academia.stackexchange.com
  cs.stackexchange.com
  computerscience.stackexchange.com
  meta.cs.stackexchange.com
  workplace.stackexchange.com
  meta.workplace.stackexchange.com
  windowsphone.stackexchange.com
  meta.windowsphone.stackexchange.com
  chemistry.stackexchange.com
  meta.chemistry.stackexchange.com
  chess.stackexchange.com
  meta.chess.stackexchange.com
  raspberrypi.stackexchange.com
  meta.raspberrypi.stackexchange.com
  russian.stackexchange.com
  meta.russian.stackexchange.com
  islam.stackexchange.com
  meta.islam.stackexchange.com
  salesforce.stackexchange.com
  meta.salesforce.stackexchange.com
  patents.stackexchange.com
  askpatents.com
  askpatents.stackexchange.com
  meta.patents.stackexchange.com
  meta.askpatents.com
  meta.askpatents.stackexchange.com
  genealogy.stackexchange.com
  meta.genealogy.stackexchange.com
  robotics.stackexchange.com
  meta.robotics.stackexchange.com
  expressionengine.stackexchange.com
  meta.expressionengine.stackexchange.com
  politics.stackexchange.com
  meta.politics.stackexchange.com
  anime.stackexchange.com
  meta.anime.stackexchange.com
  magento.stackexchange.com
  meta.magento.stackexchange.com
  ell.stackexchange.com
  meta.ell.stackexchange.com
  sustainability.stackexchange.com
  meta.sustainability.stackexchange.com
  tridion.stackexchange.com
  meta.tridion.stackexchange.com
  reverseengineering.stackexchange.com
  meta.reverseengineering.stackexchange.com
  networkengineering.stackexchange.com
  meta.networkengineering.stackexchange.com
  opendata.stackexchange.com
  meta.opendata.stackexchange.com
  freelancing.stackexchange.com
  meta.freelancing.stackexchange.com
  blender.stackexchange.com
  meta.blender.stackexchange.com
  mathoverflow.net
  mathoverflow.stackexchange.com
  mathoverflow.com
  meta.mathoverflow.net
  space.stackexchange.com
  thefinalfrontier.stackexchange.com
  meta.space.stackexchange.com
  sound.stackexchange.com
  socialsounddesign.com
  sounddesign.stackexchange.com
  meta.sound.stackexchange.com
  astronomy.stackexchange.com
  meta.astronomy.stackexchange.com
  tor.stackexchange.com
  meta.tor.stackexchange.com
  pets.stackexchange.com
  meta.pets.stackexchange.com
  ham.stackexchange.com
  meta.ham.stackexchange.com
  italian.stackexchange.com
  meta.italian.stackexchange.com
  pt.stackoverflow.com
  br.stackoverflow.com
  stackoverflow.com.br
  meta.pt.stackoverflow.com
  meta.br.stackoverflow.com
  aviation.stackexchange.com
  meta.aviation.stackexchange.com
  ebooks.stackexchange.com
  meta.ebooks.stackexchange.com
  alcohol.stackexchange.com
  beer.stackexchange.com
  dranks.stackexchange.com
  meta.alcohol.stackexchange.com
  meta.beer.stackexchange.com
  softwarerecs.stackexchange.com
  meta.softwarerecs.stackexchange.com
  arduino.stackexchange.com
  meta.arduino.stackexchange.com
  cs50.stackexchange.com
  meta.cs50.stackexchange.com
  expatriates.stackexchange.com
  expats.stackexchange.com
  meta.expatriates.stackexchange.com
  matheducators.stackexchange.com
  meta.matheducators.stackexchange.com
  meta.stackoverflow.com
  earthscience.stackexchange.com
  meta.earthscience.stackexchange.com
  joomla.stackexchange.com
  meta.joomla.stackexchange.com
  datascience.stackexchange.com
  meta.datascience.stackexchange.com
  puzzling.stackexchange.com
  meta.puzzling.stackexchange.com
  craftcms.stackexchange.com
  meta.craftcms.stackexchange.com
  buddhism.stackexchange.com
  meta.buddhism.stackexchange.com
  hinduism.stackexchange.com
  meta.hinduism.stackexchange.com
  communitybuilding.stackexchange.com
  moderator.stackexchange.com
  moderators.stackexchange.com
  meta.communitybuilding.stackexchange.com
  meta.moderators.stackexchange.com
  startups.stackexchange.com
  meta.startups.stackexchange.com
  worldbuilding.stackexchange.com
  meta.worldbuilding.stackexchange.com
  ja.stackoverflow.com
  jp.stackoverflow.com
  meta.ja.stackoverflow.com
  emacs.stackexchange.com
  meta.emacs.stackexchange.com
  hsm.stackexchange.com
  meta.hsm.stackexchange.com
  economics.stackexchange.com
  meta.economics.stackexchange.com
  lifehacks.stackexchange.com
  meta.lifehacks.stackexchange.com
  engineering.stackexchange.com
  meta.engineering.stackexchange.com
  coffee.stackexchange.com
  meta.coffee.stackexchange.com
  vi.stackexchange.com
  vim.stackexchange.com
  meta.vi.stackexchange.com
  musicfans.stackexchange.com
  meta.musicfans.stackexchange.com
  woodworking.stackexchange.com
  meta.woodworking.stackexchange.com
  civicrm.stackexchange.com
  meta.civicrm.stackexchange.com
  health.stackexchange.com
  meta.health.stackexchange.com
  ru.stackoverflow.com
  hashcode.ru
  stackoverflow.ru
  meta.ru.stackoverflow.com
  meta.hashcode.ru
  rus.stackexchange.com
  russ.hashcode.ru
  russ.stackexchange.com
  meta.rus.stackexchange.com
  mythology.stackexchange.com
  meta.mythology.stackexchange.com
  law.stackexchange.com
  meta.law.stackexchange.com
  opensource.stackexchange.com
  meta.opensource.stackexchange.com
  elementaryos.stackexchange.com
  meta.elementaryos.stackexchange.com
  portuguese.stackexchange.com
  meta.portuguese.stackexchange.com
  computergraphics.stackexchange.com
  meta.computergraphics.stackexchange.com
  hardwarerecs.stackexchange.com
  meta.hardwarerecs.stackexchange.com
  es.stackoverflow.com
  meta.es.stackoverflow.com
  3dprinting.stackexchange.com
  threedprinting.stackexchange.com
  meta.3dprinting.stackexchange.com
  ethereum.stackexchange.com
  meta.ethereum.stackexchange.com
  latin.stackexchange.com
  meta.latin.stackexchange.com
  languagelearning.stackexchange.com
  meta.languagelearning.stackexchange.com
  retrocomputing.stackexchange.com
  meta.retrocomputing.stackexchange.com
  crafts.stackexchange.com
  meta.crafts.stackexchange.com
  korean.stackexchange.com
  meta.korean.stackexchange.com
  monero.stackexchange.com
  meta.monero.stackexchange.com
  ai.stackexchange.com
  meta.ai.stackexchange.com
  esperanto.stackexchange.com
  meta.esperanto.stackexchange.com
  sitecore.stackexchange.com
  meta.sitecore.stackexchange.com
  

• page：这将是空字符串，/或/后跟任何字符串

将URL通过附加创建的字符串protocol，domain并page给对方，在这个顺序。

测试用例

您的正则表达式必须匹配：

/codegolf//
http://retrocomputing.stackexchange.com
https://facebook.stackoverflow.com/questions/1234
http://meta.nothingtoinstall.com/thisisa404.php?file=command.com

您的正则表达式不能匹配：

http//codegolf.stackexchange.com/
https://meta.stackoverflow.com.fakesite.dodgy/cgi-bin/virus.cgi?vector=apt
file://www.stackoverflow.com/
http://ripoff.com/stackoverflow.com/q/1234/

您的正则表达式可能符合：

http://panda.stackexchange.com/
https://www.meta.codegolf.stackexchange.com
http://alpha.beta.charlie.delta.chiphacker.com
https://stackexchange.com/sites/

因为它们归Stack Exchange Inc.所有，因此不会受到XSS攻击。

这是一个代码高尔夫球挑战，因此最短的正则表达式将获胜！

337个 336 333 327字节

^https?://([^/]+\.)*(stackoverflow\.(com(\.br)?|ru)|mathoverflow\.(com|net)|hashcode\.ru|((the)?arqade|chiphacker|(mi)?yodeya|ask(ubuntu|different|patents)|(seasoned|brew)advice|s(erverfault|(tack|keptic)exchange|uperuser|tackapps|harepointoverflow|ocialsounddesign)|nothingtoinstall|crossvalidated|basicallymoney)\.com)(/.*)?$

不使用任何花哨的正则表达式功能，因此它可以在任何正则表达式中使用。

359348字节

https?:\/\/(([^/]+\.)*((stack(overflow|apps|exchange)|ask(ubuntu|different|patents)|(the)?arqade|serverfault|superuser|nothingtoinstall|(seasoned|brew)advice|crossvalidated|basicallymoney|chiphacker|skepticexchange|(sharepoint|math)overflow|(mi)?yodea|socialsounddesign)\.com)|(stackoverflow(\.com\.br|\.ru)|hashcode\.ru|mathoverflow\.net))(\/.*)?$

测试出来的regexr

2179 2092 1966字节

https?:\/\/((((www|facebook|jp|(meta\.?)?(es|ru|ja|pt|br)?)\.)?stackoverflow\.com)|(stackoverflow\.(ru|com\.br))|(((russ|meta)\.)?hashcode\.ru)|(crossvalidated|socialsounddesign|mathoverflow|(mi\.?)?yodeya|(www\.)?(sharepointoverflow|basicallymoney)|skepticexchange|brewadvice|(www\.)?chiphacker|ask(different|ubuntu)|stackapps|(meta\.)?(nothingtoinstall|arqade|thearqade|seasonedadvice|superuser|serverfault|ask(ubuntu|patents)))\.com|((meta\.)?mathoverflow\.net)|(((meta\.)?((3|three)dprinting|(ask)?patents|(community|world)building|(econo|acade)mics|(it)?security|(reverse|network)?engineering|a(cademia|i|lcohol|ndroid|nime|pple|rduino|stronomy|viation|vp)|b((e|lend)er|i(cycles?|kes|ology|tcoin)|oardgames?|ricks|uddhism)|c(h(emistry|ess|inese|ristianity)|ivicrm|o(de(review|golf)|ffee|gsci|mputer(science|graphics)|oking)|r(aftcms|afts|ypto(graphy)?)|s(50)?|stheory)|d(ba|eutsch|iy|ranks|rupal|sp)|(earth|data)science|e(books|l(ectronics|ementaryos|l|u)|macs|nglish|spanol|speranto|thereum|xp(at(s|riates)|ressionengine))|f(antasy|itness|re(elancing|nch))|g(a(medev|ming|rage|rdening)|erman|enealogy|is|raphics?designs?|uitars?)|h(am|ealth|ermeneutics|induism|istory|omebrew(ing)?|sm)|(hard|soft)warerecs|islam|italian|j(apanese|oomla|udaism)|korean|l(a((ndscap|nguagelearn)ing|tin|w)|i(fehacks|nguist(ics)?|nux|))|m(a(gento|rtialarts|th(educators|ematica|ematics|s|overflow)?)|eta|echanics|o(derators?|nero|ney|vies)|usic(fans)?|ythology)|o(pen(data|source)|utdoors)|(cycl|parent|retrocomput)ing|p(ets|h(ilosophy|oto(graphy|s)?|ysics)|m|o(ker|litics|rtuguese)|roductivity|rogrammers?|uzzling)|quant|r(aspberrypi|obotics|pg|us(s|sian)?)|s(alesforce|ci(comp|encefiction|fi)|harepoint|ignals|itecore|keptics?|ound(design)?|p(ace|anish|orts)|qa|tartups|tat(s|istics)|ustainability)|t(ex|hefinalfrontier|or|ravel|ridion)|u(buntu|i|nix|x)|vi(deo|m)?|w(eb(apps|masters?)|indowsphone|o(odworking|rdpress|rkplace)|rit(ers?|ing))|(yodeya)))\.stackexchange\.com))(\/|$)

完全匹配列出的域，没有其他匹配项。我手动完成了大部分压缩操作。我花了这么多时间对此感到有些尴尬。

142个 140 334字节

#^https?:\/\/([^\/]*\.)?(hashcode\.ru|mathoverflow\.(com|net)|stackoverflow\.(ru|com(\.br)?)|((stack|skeptic)exchange|stackapps|ask(different|patents|ubuntu)|(brew|seasoned)advice|(the)?arqade|basicallymoney|chiphacker|crossvalidated|nothingtoinstall|serverfault|sharepointoverflow|socialsounddesign|superuser|(mi)?yodeya)\.com)(/|$)#

• 匹配指定二级域上的所有内容，路径或无路径
• 用途#作为分隔符所以/不需要逃逸（保存两个字节）
• 手动压缩