Merge pull request #1700 from kvch/intro-offline-engines

Initialize support for offline engines

searx/engines/__init__.py

@@ -27,7 +27,7 @@ from json import loads
 from requests import get
 from searx import settings
 from searx import logger
-from searx.utils import load_module, match_language
+from searx.utils import load_module, match_language, get_engine_from_settings
 
 
 logger = logger.getChild('engines')
@@ -53,7 +53,8 @@ engine_default_args = {'paging': False,
                        'disabled': False,
                        'suspend_end_time': 0,
                        'continuous_errors': 0,
-                       'time_range_support': False}
+                       'time_range_support': False,
+                       'offline': False}
 
 
 def load_engine(engine_data):
@@ -128,14 +129,16 @@ def load_engine(engine_data):
     engine.stats = {
         'result_count': 0,
         'search_count': 0,
-        'page_load_time': 0,
-        'page_load_count': 0,
         'engine_time': 0,
         'engine_time_count': 0,
         'score_count': 0,
         'errors': 0
     }
 
+    if not engine.offline:
+        engine.stats['page_load_time'] = 0
+        engine.stats['page_load_count'] = 0
+
     for category_name in engine.categories:
         categories.setdefault(category_name, []).append(engine)
 
@@ -173,11 +176,6 @@ def get_engines_stats():
         results_num = \
             engine.stats['result_count'] / float(engine.stats['search_count'])
 
-        if engine.stats['page_load_count'] != 0:
-            load_times = engine.stats['page_load_time'] / float(engine.stats['page_load_count'])  # noqa
-        else:
-            load_times = 0
-
         if engine.stats['engine_time_count'] != 0:
             this_engine_time = engine.stats['engine_time'] / float(engine.stats['engine_time_count'])  # noqa
         else:
@@ -189,14 +187,19 @@ def get_engines_stats():
         else:
             score = score_per_result = 0.0
 
-        max_pageload = max(load_times, max_pageload)
+        if not engine.offline:
+            load_times = 0
+            if engine.stats['page_load_count'] != 0:
+                load_times = engine.stats['page_load_time'] / float(engine.stats['page_load_count'])  # noqa
+            max_pageload = max(load_times, max_pageload)
+            pageloads.append({'avg': load_times, 'name': engine.name})
+
         max_engine_times = max(this_engine_time, max_engine_times)
         max_results = max(results_num, max_results)
         max_score = max(score, max_score)
         max_score_per_result = max(score_per_result, max_score_per_result)
         max_errors = max(max_errors, engine.stats['errors'])
 
-        pageloads.append({'avg': load_times, 'name': engine.name})
         engine_times.append({'avg': this_engine_time, 'name': engine.name})
         results.append({'avg': results_num, 'name': engine.name})
         scores.append({'avg': score, 'name': engine.name})
@@ -255,7 +258,7 @@ def initialize_engines(engine_list):
     load_engines(engine_list)
 
     def engine_init(engine_name, init_fn):
-        init_fn()
+        init_fn(get_engine_from_settings(engine_name))
         logger.debug('%s engine: Initialized', engine_name)
 
     for engine_name, engine in engines.items():

searx/engines/soundcloud.py

@@ -66,7 +66,7 @@ def get_client_id():
     return ""
 
 
-def init():
+def init(engine_settings=None):
     global guest_client_id
     # api-key
     guest_client_id = get_client_id()

searx/engines/wolframalpha_noapi.py

@@ -55,7 +55,7 @@ def obtain_token():
     return token
 
 
-def init():
+def init(engine_settings=None):
     obtain_token()
 
 

searx/plugins/https_rewrite.py

@@ -225,6 +225,9 @@ def https_url_rewrite(result):
 
 
 def on_result(request, search, result):
+    if 'parsed_url' not in result:
+        return True
+
     if result['parsed_url'].scheme == 'http':
         https_url_rewrite(result)
     return True

searx/plugins/oa_doi_rewrite.py

@@ -35,6 +35,9 @@ def get_doi_resolver(args, preference_doi_resolver):
 
 
 def on_result(request, search, result):
+    if 'parsed_url' not in result:
+        return True
+
     doi = extract_doi(result['parsed_url'])
     if doi and len(doi) < 50:
         for suffix in ('/', '.pdf', '/full', '/meta', '/abstract'):

searx/plugins/tracker_url_remover.py

@@ -30,6 +30,9 @@ preference_section = 'privacy'
 
 
 def on_result(request, search, result):
+    if 'parsed_url' not in result:
+        return True
+
     query = result['parsed_url'].query
 
     if query == "":

searx/results.py

@@ -197,6 +197,13 @@ class ResultContainer(object):
             self.infoboxes.append(infobox)
 
     def _merge_result(self, result, position):
+        if 'url' in result:
+            self.__merge_url_result(result, position)
+            return
+
+        self.__merge_result_no_url(result, position)
+
+    def __merge_url_result(self, result, position):
         result['parsed_url'] = urlparse(result['url'])
 
         # if the result has no scheme, use http as default
@@ -210,51 +217,60 @@ class ResultContainer(object):
         if result.get('content'):
             result['content'] = WHITESPACE_REGEX.sub(' ', result['content'])
 
-        # check for duplicates
-        duplicated = False
+        duplicated = self.__find_duplicated_http_result(result)
+        if duplicated:
+            self.__merge_duplicated_http_result(duplicated, result, position)
+            return
+
+        # if there is no duplicate found, append result
+        result['positions'] = [position]
+        with RLock():
+            self._merged_results.append(result)
+
+    def __find_duplicated_http_result(self, result):
         result_template = result.get('template')
         for merged_result in self._merged_results:
+            if 'parsed_url' not in merged_result:
+                continue
             if compare_urls(result['parsed_url'], merged_result['parsed_url'])\
                and result_template == merged_result.get('template'):
                 if result_template != 'images.html':
                     # not an image, same template, same url : it's a duplicate
-                    duplicated = merged_result
-                    break
+                    return merged_result
                 else:
                     # it's an image
                     # it's a duplicate if the parsed_url, template and img_src are differents
                     if result.get('img_src', '') == merged_result.get('img_src', ''):
-                        duplicated = merged_result
-                        break
+                        return merged_result
+        return None
 
-        # merge duplicates together
-        if duplicated:
-            # using content with more text
-            if result_content_len(result.get('content', '')) >\
-                    result_content_len(duplicated.get('content', '')):
-                duplicated['content'] = result['content']
+    def __merge_duplicated_http_result(self, duplicated, result, position):
+        # using content with more text
+        if result_content_len(result.get('content', '')) >\
+                result_content_len(duplicated.get('content', '')):
+            duplicated['content'] = result['content']
 
-            # merge all result's parameters not found in duplicate
-            for key in result.keys():
-                if not duplicated.get(key):
-                    duplicated[key] = result.get(key)
+        # merge all result's parameters not found in duplicate
+        for key in result.keys():
+            if not duplicated.get(key):
+                duplicated[key] = result.get(key)
 
-            # add the new position
-            duplicated['positions'].append(position)
+        # add the new position
+        duplicated['positions'].append(position)
 
-            # add engine to list of result-engines
-            duplicated['engines'].add(result['engine'])
+        # add engine to list of result-engines
+        duplicated['engines'].add(result['engine'])
 
-            # using https if possible
-            if duplicated['parsed_url'].scheme != 'https' and result['parsed_url'].scheme == 'https':
-                duplicated['url'] = result['parsed_url'].geturl()
-                duplicated['parsed_url'] = result['parsed_url']
+        # using https if possible
+        if duplicated['parsed_url'].scheme != 'https' and result['parsed_url'].scheme == 'https':
+            duplicated['url'] = result['parsed_url'].geturl()
+            duplicated['parsed_url'] = result['parsed_url']
 
-        # if there is no duplicate found, append result
-        else:
-            result['positions'] = [position]
-            with RLock():
-                self._merged_results.append(result)
+    def __merge_result_no_url(self, result, position):
+        result['engines'] = set([result['engine']])
+        result['positions'] = [position]
+        with RLock():
+            self._merged_results.append(result)
 
     def order_results(self):
         for result in self._merged_results:

searx/search.py

@@ -77,7 +77,7 @@ def send_http_request(engine, request_params):
     return req(request_params['url'], **request_args)
 
 
-def search_one_request(engine, query, request_params):
+def search_one_http_request(engine, query, request_params):
     # update request parameters dependent on
     # search-engine (contained in engines folder)
     engine.request(query, request_params)
@@ -97,7 +97,53 @@ def search_one_request(engine, query, request_params):
     return engine.response(response)
 
 
+def search_one_offline_request(engine, query, request_params):
+    return engine.search(query, request_params)
+
+
 def search_one_request_safe(engine_name, query, request_params, result_container, start_time, timeout_limit):
+    if engines[engine_name].offline:
+        return search_one_offline_request_safe(engine_name, query, request_params, result_container, start_time, timeout_limit)  # noqa
+    return search_one_http_request_safe(engine_name, query, request_params, result_container, start_time, timeout_limit)
+
+
+def search_one_offline_request_safe(engine_name, query, request_params, result_container, start_time, timeout_limit):
+    engine = engines[engine_name]
+
+    try:
+        search_results = search_one_offline_request(engine, query, request_params)
+
+        if search_results:
+            result_container.extend(engine_name, search_results)
+
+            engine_time = time() - start_time
+            result_container.add_timing(engine_name, engine_time, engine_time)
+            with threading.RLock():
+                engine.stats['engine_time'] += engine_time
+                engine.stats['engine_time_count'] += 1
+
+    except ValueError as e:
+        record_offline_engine_stats_on_error(engine, result_container, start_time)
+        logger.exception('engine {0} : invalid input : {1}'.format(engine_name, e))
+    except Exception as e:
+        record_offline_engine_stats_on_error(engine, result_container, start_time)
+
+        result_container.add_unresponsive_engine((
+            engine_name,
+            u'{0}: {1}'.format(gettext('unexpected crash'), e),
+        ))
+        logger.exception('engine {0} : exception : {1}'.format(engine_name, e))
+
+
+def record_offline_engine_stats_on_error(engine, result_container, start_time):
+    engine_time = time() - start_time
+    result_container.add_timing(engine.name, engine_time, engine_time)
+
+    with threading.RLock():
+        engine.stats['errors'] += 1
+
+
+def search_one_http_request_safe(engine_name, query, request_params, result_container, start_time, timeout_limit):
     # set timeout for all HTTP requests
     requests_lib.set_timeout_for_thread(timeout_limit, start_time=start_time)
     # reset the HTTP total time
@@ -111,7 +157,7 @@ def search_one_request_safe(engine_name, query, request_params, result_container
 
     try:
         # send requests and parse the results
-        search_results = search_one_request(engine, query, request_params)
+        search_results = search_one_http_request(engine, query, request_params)
 
         # check if the engine accepted the request
         if search_results is not None:
@@ -427,19 +473,21 @@ class Search(object):
                 continue
 
             # set default request parameters
-            request_params = default_request_params()
-            request_params['headers']['User-Agent'] = user_agent
-            request_params['category'] = selected_engine['category']
-            request_params['pageno'] = search_query.pageno
+            request_params = {}
+            if not engine.offline:
+                request_params = default_request_params()
+                request_params['headers']['User-Agent'] = user_agent
 
-            if hasattr(engine, 'language') and engine.language:
-                request_params['language'] = engine.language
-            else:
-                request_params['language'] = search_query.lang
+                if hasattr(engine, 'language') and engine.language:
+                    request_params['language'] = engine.language
+                else:
+                    request_params['language'] = search_query.lang
 
-            # 0 = None, 1 = Moderate, 2 = Strict
-            request_params['safesearch'] = search_query.safesearch
-            request_params['time_range'] = search_query.time_range
+                request_params['safesearch'] = search_query.safesearch
+                request_params['time_range'] = search_query.time_range
+
+            request_params['category'] = selected_engine['category']
+            request_params['pageno'] = search_query.pageno
 
             # append request to list
             requests.append((selected_engine['name'], search_query.query, request_params))

searx/static/themes/courgette/css/style.css

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\ No newline at end of file
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searx/static/themes/courgette/less/style.less

@@ -325,6 +325,10 @@ a {
 	font-size: 0.9em;
 }
 
+.result .engines {
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+}
+
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searx/static/themes/legacy/css/style.css

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\ No newline at end of file

searx/static/themes/legacy/less/style.less

@@ -376,6 +376,10 @@ table {
 	width: 100%;
 }
 
+.result-table {
+    margin-bottom: 10px;
+}
+
 td {
 	padding: 0 4px;
 }

searx/templates/courgette/result_templates/key-value.html

+<div class="result">
+<table>
+    {% for key, value in result.items() %}
+    {% if key in ['engine', 'engines', 'template', 'score', 'category', 'positions'] %}
+        {% continue %}
+    {% endif %}
+    <tr>
+        <td><b>{{ key|upper }}</b>: {{ value|safe }}</td>
+    </tr>
+    {% endfor %}
+</table>
+<p class="engines">{{ result.engines|join(', ') }}</p>
+</div>

searx/templates/legacy/result_templates/key-value.html

+<table class="result-table">
+    {% for key, value in result.items() %}
+    {% if key in ['engine', 'engines', 'template', 'score', 'category', 'positions'] %}
+        {% continue %}
+    {% endif %}
+    <tr>
+        <td><b>{{ key|upper }}</b>: {{ value|safe }}</td>
+    </tr>
+    {% endfor %}
+    <tr>
+        <td><b>ENGINES</b>: {{ result.engines|join(', ') }}</td>
+    </tr>
+</table>

searx/templates/oscar/macros.html

@@ -14,7 +14,7 @@
 
 <!-- Draw result header -->
 {% macro result_header(result, favicons) -%}
-<h4 class="result_header">{% if result.engine~".png" in favicons %}{{ draw_favicon(result.engine) }} {% endif %}{{ result_link(result.url, result.title|safe) }}</h4>
+<h4 class="result_header">{% if result.engine~".png" in favicons %}{{ draw_favicon(result.engine) }} {% endif %}{% if result.url %}{{ result_link(result.url, result.title|safe) }}{% else %}{{ result.title|safe}}{% endif %}</h4>
 {%- endmacro %}
 
 <!-- Draw result sub header -->
@@ -31,12 +31,16 @@
     {% for engine in result.engines %}
         <span class="label label-default">{{ engine }}</span>
     {% endfor %}
+    {% if result.url %}
     <small>{{ result_link("https://web.archive.org/web/" + result.url, icon('link') + _('cached'), "text-info") }}</small>
+    {% endif %}
     {% if proxify %}
     <small>{{ result_link(proxify(result.url), icon('sort') + _('proxied'), "text-info") }}</small>
     {% endif %}
 </div>
+{% if result.pretty_url %}
 <div class="external-link">{{ result.pretty_url }}</div>
+{% endif %}
 {%- endmacro %}
 
 <!-- Draw result footer -->
@@ -45,11 +49,15 @@
     {% for engine in result.engines %}
         <span class="label label-default">{{ engine }}</span>
     {% endfor %}
+    {% if result.url %}
     <small>{{ result_link("https://web.archive.org/web/" + result.url, icon('link') + _('cached'), "text-info") }}</small>
+    {% endif %}
     {% if proxify %}
     <small>{{ result_link(proxify(result.url), icon('sort') + _('proxied'), "text-info") }}</small>
     {% endif %}
+    {% if result.pretty_url %}
     <div class="external-link">{{ result.pretty_url }}</div>
+    {% endif %}
 {%- endmacro %}
 
 {% macro preferences_item_header(info, label, rtl) -%}

searx/templates/oscar/result_templates/key-value.html

+{% from 'oscar/macros.html' import result_footer, result_footer_rtl with context %}
+<div class="panel panel-default">
+<table class="table table-responsive table-bordered table-condensed">
+    {% for key, value in result.items() %}
+    {% if key in ['engine', 'engines', 'template', 'score', 'category', 'positions'] %}
+        {% continue %}
+    {% endif %}
+    <tr>
+        <td><b>{{ key|upper }}</b>: {{ value }}</td>
+    </tr>
+    {% endfor %}
+</table>
+
+{% if rtl %}
+{{ result_footer_rtl(result) }}
+{% else %}
+{{ result_footer(result) }}
+{% endif %}
+</div>

searx/templates/simple/result_templates/key-value.html

+<table>
+    {% for key, value in result.items() %}
+    {% if key in ['engine', 'engines', 'template', 'score', 'category', 'positions'] %}
+        {% continue %}
+    {% endif %}
+    <tr>
+        <td><b>{{ key|upper }}</b>: {{ value }}</td>
+    </tr>
+    {% endfor %}
+</table>
+<div class="engines">{% for engine in result.engines %}<span>{{ engine }}</span>{% endfor %}</div>{{- '' -}}

searx/utils.py

@@ -435,3 +435,18 @@ def ecma_unescape(s):
     # "%20" becomes " ", "%F3" becomes "ó"
     s = ecma_unescape2_re.sub(lambda e: unichr(int(e.group(1), 16)), s)
     return s
+
+
+def get_engine_from_settings(name):
+    """Return engine configuration from settings.yml of a given engine name"""
+
+    if 'engines' not in settings:
+        return {}
+
+    for engine in settings['engines']:
+        if 'name' not in engine:
+            continue
+        if name == engine['name']:
+            return engine
+
+    return {}

searx/webapp.py

@@ -124,6 +124,7 @@ app = Flask(
 
 app.jinja_env.trim_blocks = True
 app.jinja_env.lstrip_blocks = True
+app.jinja_env.add_extension('jinja2.ext.loopcontrols')
 app.secret_key = settings['server']['secret_key']
 
 if not searx_debug \
@@ -538,14 +539,16 @@ def index():
         if output_format == 'html':
             if 'content' in result and result['content']:
                 result['content'] = highlight_content(escape(result['content'][:1024]), search_query.query)
-            result['title'] = highlight_content(escape(result['title'] or u''), search_query.query)
+            if 'title' in result and result['title']:
+                result['title'] = highlight_content(escape(result['title'] or u''), search_query.query)
         else:
             if result.get('content'):
                 result['content'] = html_to_text(result['content']).strip()
             # removing html content and whitespace duplications
             result['title'] = ' '.join(html_to_text(result['title']).strip().split())
 
-        result['pretty_url'] = prettify_url(result['url'])
+        if 'url' in result:
+            result['pretty_url'] = prettify_url(result['url'])
 
         # TODO, check if timezone is calculated right
         if 'publishedDate' in result: