[enh] oa_doi_rewrite plugin broadens doai_rewrite

searx/plugins/__init__.py

 
 logger = logger.getChild('plugins')
 
-from searx.plugins import (doai_rewrite,
+from searx.plugins import (oa_doi_rewrite,
                            https_rewrite,
                            infinite_scroll,
                            open_results_on_new_tab,
 
 
 plugins = PluginStore()
-plugins.register(doai_rewrite)
+plugins.register(oa_doi_rewrite)
 plugins.register(https_rewrite)
 plugins.register(infinite_scroll)
 plugins.register(open_results_on_new_tab)

searx/plugins/doai_rewrite.py → searx/plugins/oa_doi_rewrite.py

 from flask_babel import gettext
 import re
 from searx.url_utils import urlparse, parse_qsl
+from flask import request
+from searx import settings
+
 
 regex = re.compile(r'10\.\d{4,9}/[^\s]+')
 
-name = gettext('DOAI rewrite')
+name = gettext('Open Access DOI rewrite')
 description = gettext('Avoid paywalls by redirecting to open-access versions of publications when available')
 default_on = False
 preference_section = 'privacy'
 
+doi_resolvers = settings['doi_resolvers']
+
 
 def extract_doi(url):
     match = regex.search(url.path)
     return None
 
 
+def get_doi_resolver():
+    doi_resolvers = settings['doi_resolvers']
+    doi_resolver = request.args.get('doi_resolver', request.preferences.get_value('doi_resolver'))[0]
+    if doi_resolver not in doi_resolvers:
+        doi_resolvers = settings['default_doi_resolver']
+    return doi_resolvers[doi_resolver]
+
+
 def on_result(request, search, result):
     doi = extract_doi(result['parsed_url'])
     if doi and len(doi) < 50:
         for suffix in ('/', '.pdf', '/full', '/meta', '/abstract'):
             if doi.endswith(suffix):
                 doi = doi[:-len(suffix)]
-        result['url'] = 'http://doai.io/' + doi
+        result['url'] = get_doi_resolver() + doi
         result['parsed_url'] = urlparse(result['url'])
     return True

searx/preferences.py

 LANGUAGE_CODES.append('all')
 DISABLED = 0
 ENABLED = 1
+DOI_RESOLVERS = [r for r in settings['doi_resolvers'].keys()]
 
 
 class MissingArgumentException(Exception):
                                    'results_on_new_tab': MapSetting(False, map={'0': False,
                                                                                 '1': True,
                                                                                 'False': False,
-                                                                                'True': True})}
+                                                                                'True': True}),
+                                   'doi_resolver': MultipleChoiceSetting(['oadoi.org'], choices=DOI_RESOLVERS),
+                                   }
 
         self.engines = EnginesSetting('engines', choices=engines)
         self.plugins = PluginsSetting('plugins', choices=plugins)

searx/settings.yml

     tr : Türkçe (Turkish)
     uk : українська мова (Ukrainian)
     zh : 中文 (Chinese)
+
+doi_resolvers :
+  oadoi.org : 'https://oadoi.org/'
+  doi.org : 'https://doi.org/'
+  doai.io  : 'http://doai.io/'
+
+default_doi_resolver : 'oadoi.org'

searx/templates/oscar/preferences.html

                             </div>
                         </div>
                         {% endfor %}
+                        <div class="panel panel-default">
+                            <div class="panel-heading">
+                                <h3 class="panel-title">{{ _('OA DOI rewrite') }}</h3>
+                            </div>
+                            <div class="panel-body">
+                                <div class="col-xs-6 col-sm-4 col-md-6">{{ _('Avoid paywalls by redirecting to open-access versions of publications when available') }}</div>
+                                <div class="col-xs-6 col-sm-4 col-md-6">
+                                    <select class="form-control" id='doi_resolver' name='doi_resolver'>
+                                        {% for doi_resolver_name,doi_resolver_url in doi_resolvers.items() %}
+                                        <option value="{{ doi_resolver_name }}" {% if doi_resolver_name == current_doi_resolver %}selected="selected"{% endif %}>
+                                                {{ doi_resolver_name }} - {{ doi_resolver_url }}
+                                        </option>
+                                         {% endfor %}
+                                     </select>
+                                </div>
+                            </div>
+                        </div>
                     </div>
                 </fieldset>
             </div>

searx/webapp.py

     return locale
 
 
+def get_doi_resolver():
+    doi_resolvers = settings['doi_resolvers']
+    doi_resolver = request.args.get('doi_resolver', request.preferences.get_value('doi_resolver'))[0]
+    if doi_resolver not in doi_resolvers:
+        doi_resolvers = settings['default_doi_resolver']
+    return doi_resolver
+
+
 # code-highlighter
 @app.template_filter('code_highlighter')
 def code_highlighter(codelines, language=None):
                   shortcuts={y: x for x, y in engine_shortcuts.items()},
                   themes=themes,
                   plugins=plugins,
+                  doi_resolvers=settings['doi_resolvers'],
+                  current_doi_resolver=get_doi_resolver(),
                   allowed_plugins=allowed_plugins,
                   theme=get_current_theme_name(),
                   preferences_url_params=request.preferences.get_as_url_params(),
                     'autocomplete': settings['search']['autocomplete'],
                     'safe_search': settings['search']['safe_search'],
                     'default_theme': settings['ui']['default_theme'],
-                    'version': VERSION_STRING})
+                    'version': VERSION_STRING,
+                    'doi_resolvers': [r for r in search['doi_resolvers']],
+                    'default_doi_resolver': settings['default_doi_resolver'],
+                    })
 
 
 @app.errorhandler(404)