Support captcha solving services.

package.json

@@ -21,6 +21,7 @@
     "chromeStoreID": "ohnjgmpcibpbafdlkimncjhflgedgpam",
     "recaptchaKey": "6Ldp2bsSAAAAAAJ5uyx_lx34lJeEpTLVkP5k04qc",
     "youtubeAPIKey": "AIzaSyB5_zaen_-46Uhz1xGR-lz1YoUMHqCD6CE",
+    "captchaServiceLinks": [["captcha.guru", "https://captcha.guru/en/regen/?ref=104127"], ["2captcha", "https://2captcha.com?from=7935487"]],
     "distBranch": "gh-pages",
     "includes_only": [
       "*://boards.4chan.org/*",

src/General/Settings.coffee

@@ -555,7 +555,7 @@ Settings =
       $.id('lastarchivecheck').textContent = 'never'
 
     items = {}
-    for name in ['archiveLists', 'archiveAutoUpdate', 'captchaLanguage', 'boardnav', 'time', 'timeLocale', 'backlink', 'pastedname', 'fileInfo', 'QR.personas', 'favicon', 'usercss', 'customCooldown', 'jsWhitelist']
+    for name in ['archiveLists', 'archiveAutoUpdate', 'captchaLanguage', 'captchaServiceDomain', 'boardnav', 'time', 'timeLocale', 'backlink', 'pastedname', 'fileInfo', 'QR.personas', 'favicon', 'usercss', 'customCooldown', 'jsWhitelist']
       items[name] = Conf[name]
       input = inputs[name]
       event = if name in ['archiveLists', 'archiveAutoUpdate', 'QR.personas', 'favicon', 'usercss'] then 'change' else 'input'
@@ -571,6 +571,11 @@ Settings =
           Settings[key].call input
       return
 
+    $.on inputs['captchaServiceKey'], 'input', Settings.captchaServiceKey
+    $.get 'captchaServiceKey', Conf['captchaServiceKey'], ({captchaServiceKey}) ->
+      Conf['captchaServiceKey'] = captchaServiceKey
+      Settings.captchaServiceDomainList()
+
     interval  = inputs['Interval']
     customCSS = inputs['Custom CSS']
     applyCSS  = $ '#apply-css', section
@@ -702,6 +707,31 @@ Settings =
       Conf['selectedArchives'] = selectedArchives
       Redirect.selectArchives()
 
+  captchaServiceDomain: ->
+    $.get 'captchaServiceKey', Conf['captchaServiceKey'], ({captchaServiceKey}) =>
+      keyInput = $('[name=captchaServiceKey]')
+      keyInput.value = captchaServiceKey[@value.trim()] or ''
+      keyInput.disabled = !@value.trim()
+
+  captchaServiceKey: ->
+    domain = Conf['captchaServiceDomain']
+    value = @value.trim()
+    Conf['captchaServiceKey'][domain] = value
+    $.get 'captchaServiceKey', Conf['captchaServiceKey'], ({captchaServiceKey}) ->
+      captchaServiceKey[domain] = value
+      delete captchaServiceKey[domain] unless value or (domain of Config['captchaServiceKey'][0])
+      Conf['captchaServiceKey'] = captchaServiceKey
+      $.set 'captchaServiceKey', captchaServiceKey
+      Settings.captchaServiceDomainList()
+
+  captchaServiceDomainList: ->
+    list = $.id 'list-captchaServiceDomain'
+    $.rmAll list
+    for domain of Conf['captchaServiceKey']
+      $.add list, $.el 'option',
+        textContent: domain
+    return
+
   boardnav: ->
     Header.generateBoardList @value
 

src/General/Settings/Advanced.html

@@ -25,6 +25,20 @@
   <div><input name="captchaLanguage" class="field" spellcheck="false"></div>
 </fieldset>
 
+<fieldset>
+  <legend>Captcha Solving Service</legend>
+  <div>
+    Supported services include 
+    <%= meta.captchaServiceLinks.map(function(x) {return '<a href="' + x[1] + '" target="_blank">' + x[0] + '</a>'}).join(', ') %>, 
+    and any other service implementing the 2captcha API.<br>
+    Leave blank to disable.
+  <div>
+    Domain: <input name="captchaServiceDomain" class="field" spellcheck="false" list="list-captchaServiceDomain"> 
+    API Key: <input name="captchaServiceKey" class="field" spellcheck="false">
+    <datalist id="list-captchaServiceDomain"></datalist>
+  </div>
+</fieldset>
+
 <fieldset>
   <legend>Custom Board Navigation</legend>
   <div><textarea hidden name="boardnav" class="field" spellcheck="false"></textarea></div>

src/Posting/Captcha.service.coffee

@@ -0,0 +1,76 @@
+Captcha.service =
+  init: ->
+    Conf['captchaServiceDomain'] = ''
+    $.on d, 'LoadCaptcha',              @loadCaptcha.bind(@)
+    $.on d, 'AbortCaptcha SaveCaptcha', @abortCaptcha.bind(@)
+    $.on d, 'RequestCaptcha',           @requestCaptcha.bind(@)
+
+  isEnabled: ->
+    Conf['captchaServiceDomain'] and /\S/.test(Conf['captchaServiceDomain'])
+
+  loadCaptcha: (e) ->
+    return unless @isEnabled()
+    e.preventDefault() if !@pending or @aborted
+
+  abortCaptcha: ->
+    @aborted = true if @pending
+
+  requestCaptcha: (e) ->
+    return unless @isEnabled()
+    return if e.defaultPrevented
+    if @pending and @aborted
+      @aborted = false
+      return
+    return if @pending
+    @pending = true
+    @aborted = false
+    e.preventDefault()
+    key = Conf['captchaServiceKey'][Conf['captchaServiceDomain']]
+    return @noCaptcha 'API key not set' unless key and /\S/.test(key)
+    url = "#{Conf['captchaServiceDomain']}/in.php?key=#{encodeURIComponent key}&method=userrecaptcha&googlekey=<%= meta.recaptchaKey %>&pageurl=https://boards.4channel.org/v/"
+    @req = CrossOrigin.ajax url,
+      responseType: 'text'
+      onloadend: =>
+        response = @req.response or ''
+        parts = response.split('|')
+        if parts[0] is 'OK'
+          @requestID = parts[1]
+          @interval = setInterval @poll.bind(@), 5 * $.SECOND
+        else
+          @noCaptcha()
+
+  poll: ->
+    key = Conf['captchaServiceKey'][Conf['captchaServiceDomain']]
+    return @noCaptcha 'API key not set' unless key and /\S/.test(key)
+    url = "#{Conf['captchaServiceDomain']}/res.php?key=#{encodeURIComponent key}&action=get&id=#{encodeURIComponent @requestID}"
+    @req = CrossOrigin.ajax url,
+      responseType: 'text'
+      onloadend: =>
+        return unless @req.status
+        response = @req.response or ''
+        parts = response.split('|')
+        if parts[0] is 'CAPCHA_NOT_READY'
+          # pass
+        else if parts[0] is 'OK'
+          clearInterval @interval
+          @saveCaptcha parts[1]
+        else
+          clearInterval @interval
+          @noCaptcha()
+
+  noCaptcha: (error) ->
+    @pending = false
+    return if @aborted
+    error = if @req.status is 200
+      @req.response
+    else if @req.status
+      "#{@req.statusText} (#{@req.status})"
+    else
+      'Connection Error'
+    error = "Failed to retrieve captcha: #{error}"
+    $.event 'NoCaptcha', {error}
+
+  saveCaptcha: (response) ->
+    @pending = false
+    timeout = Date.now() + Captcha.v2.lifetime
+    $.event 'SaveCaptcha', {response, timeout}

src/config/Config.coffee

@@ -1154,3 +1154,9 @@ Config =
     'updater.position':        'bottom: 0px; left: 0px;'
     'thread-watcher.position': 'top: 50px; left: 0px;'
     'qr.position':             'top: 50px; right: 0px;'
+
+  captchaServiceDomain: ''
+  captchaServiceKey: [{
+    'https://api.captcha.guru': ''
+    'https://2captcha.com':     ''
+  }]

src/main/Main.coffee

@@ -551,6 +551,7 @@ Main =
     ['Reply Hiding Buttons',      PostHiding]
     ['Recursive',                 Recursive]
     ['Strike-through Quotes',     QuoteStrikeThrough]
+    ['Captcha Solving Service',   Captcha.service]
     ['Quick Reply Personas',      QR.persona]
     ['Quick Reply',               QR]
     ['Cooldown',                  QR.cooldown]