[enh] add safesearch functionality

2 = strict
1 = moderate
0 = none

searx/engines/bing_images.py

 # engine dependent config
 categories = ['images']
 paging = True
+safesearch = True
 
 # search-url
 base_url = 'https://www.bing.com/'
 search_string = 'images/search?{query}&count=10&first={offset}'
 thumb_url = "http://ts1.mm.bing.net/th?id={ihk}"
 
+# safesearch definitions
+safesearch_types = {2: 'STRICT',
+                    1: 'DEMOTE',
+                    0: 'OFF'}
 
 # do search-request
 def request(query, params):
         offset=offset)
 
     params['cookies']['SRCHHPGUSR'] = \
-        'NEWWND=0&NRSLT=-1&SRCHLANG=' + language.split('-')[0]
+        'NEWWND=0&NRSLT=-1&SRCHLANG=' + language.split('-')[0] +\
+        '&ADLT=' + safesearch_types.get(params['safesearch'], 'DEMOTE')
 
     params['url'] = base_url + search_path
 

searx/engines/blekko_images.py

 # engine dependent config
 categories = ['images']
 paging = True
+safesearch = True
 
 # search-url
 base_url = 'https://blekko.com'
 search_url = '/api/images?{query}&c={c}'
 
+# safesearch definitions
+safesearch_types = {2: '1',
+                    1: '',
+                    0: '0'}
 
 # do search-request
 def request(query, params):
     if params['pageno'] != 1:
         params['url'] += '&page={pageno}'.format(pageno=(params['pageno']-1))
 
+    # let Blekko know we wan't have profiling
+    params['cookies']['tag_lesslogging'] = '1'
+
+    # parse safesearch argument
+    params['cookies']['safesearch'] = safesearch_types.get(params['safesearch'], '')
+
     return params
 
 

searx/search.py

             request_params['started'] = time()
             request_params['pageno'] = self.pageno
             request_params['language'] = self.lang
+            try:
+                # 0 = None, 1 = Moderate, 2 = Strict
+                request_params['safesearch'] = int(request.cookies.get('safesearch', 1))
+            except ValueError:
+                request_params['safesearch'] = 1
 
             # update request parameters dependent on
             # search-engine (contained in engines folder)

searx/templates/courgette/preferences.html

         </p>
     </fieldset>
     <fieldset>
+        <legend>{{ _('SafeSearch') }}</legend>
+        <p>
+            <select name='safesearch'>
+                <option value="2" {% if safesearch == '2' %}selected="selected"{% endif %}>{{ _('Strict') }}</option>
+                <option value="1" {% if safesearch == '1' %}selected="selected"{% endif %}>{{ _('Moderate') }}</option>
+                <option value="0" {% if safesearch == '0' %}selected="selected"{% endif %}>{{ _('None') }}</option>
+            </select>
+        </p>
+    </fieldset>
+    <fieldset>
         <legend>{{ _('Themes') }}</legend>
         <p>
             <select name="theme">

searx/templates/default/preferences.html

         </p>
     </fieldset>
     <fieldset>
+        <legend>{{ _('SafeSearch') }}</legend>
+        <p>
+        <select name='safesearch'>
+            <option value="2" {% if safesearch == '2' %}selected="selected"{% endif %}>{{ _('Strict') }}</option>
+            <option value="1" {% if safesearch == '1' %}selected="selected"{% endif %}>{{ _('Moderate') }}</option>
+            <option value="0" {% if safesearch == '0' %}selected="selected"{% endif %}>{{ _('None') }}</option>
+        </select>
+        </p>
+    </fieldset>
+    <fieldset>
         <legend>{{ _('Themes') }}</legend>
         <p>
         <select name="theme">

searx/templates/oscar/preferences.html

                     <span class="col-sm-5 col-md-6 help-block">{{ _('Change how forms are submited, <a href="http://en.wikipedia.org/wiki/Hypertext_Transfer_Protocol#Request_methods" rel="external">learn more about request methods</a>') }}</span>
                 </div>
                 <div class="row form-group">
+                    <label class="col-sm-3 col-md-2">{{ _('SafeSearch') }}</label>
+                    <div class="col-sm-4 col-md-4">
+                        <select class="form-control" name='safesearch'>
+                            <option value="2" {% if safesearch == '2' %}selected="selected"{% endif %}>{{ _('Strict') }}</option>
+                            <option value="1" {% if safesearch == '1' %}selected="selected"{% endif %}>{{ _('Moderate') }}</option>
+                            <option value="0" {% if safesearch == '0' %}selected="selected"{% endif %}>{{ _('None') }}</option>
+                        </select>
+                    </div>
+                    <span class="col-sm-5 col-md-6 help-block">{{ _('Filter explicite content') }}</span>
+                </div>
+                <div class="row form-group">
                     <label class="col-sm-3 col-md-2">{{ _('Themes') }}</label>
                     <div class="col-sm-4 col-md-4">
                         <select class="form-control" name="theme">

searx/webapp.py

 
     kwargs['method'] = request.cookies.get('method', 'POST')
 
+    kwargs['safesearch'] = request.cookies.get('safesearch', '1')
+
     # override url_for function in templates
     kwargs['url_for'] = url_for_theme
 
     Settings that are going to be saved as cookies."""
     lang = None
     image_proxy = request.cookies.get('image_proxy', settings['server'].get('image_proxy'))
+    try:
+        savesearch = int(request.cookies.get('savesearch', 1))
+    except ValueError:
+        savesearch = 1
 
     if request.cookies.get('language')\
        and request.cookies['language'] in (x[0] for x in language_codes):
         locale = None
         autocomplete = ''
         method = 'POST'
+        safesearch = '1'
+
         for pd_name, pd in request.form.items():
             if pd_name.startswith('category_'):
                 category = pd_name[9:]
                 lang = pd
             elif pd_name == 'method':
                 method = pd
+            elif pd_name == 'safesearch':
+                safesearch = pd
             elif pd_name.startswith('engine_'):
                 if pd_name.find('__') > -1:
                     engine_name, category = pd_name.replace('engine_', '', 1).split('__', 1)
             )
 
         resp.set_cookie('method', method, max_age=cookie_max_age)
+        
+        resp.set_cookie('safesearch', safesearch, max_age=cookie_max_age)
 
         resp.set_cookie('image_proxy', image_proxy, max_age=cookie_max_age)