[enh] Add timeout limit per request (#1640)

The new url parameter "timeout_limit" set timeout limit defined in second.
Example "timeout_limit=1.5" means the timeout limit is 1.5 seconds.

In addition, the query can start with <[number] to set the timeout limit.

For number between 0 and 99, the unit is the second :
Example: "<30 searx" means the timeout limit is 3 seconds

For number above 100, the unit is the millisecond:
Example: "<850 searx" means the timeout is 850 milliseconds.

In addition, there is a new optional setting: outgoing.max_request_timeout.
If not set, the user timeout can't go above searx configuration (as before: the max timeout of selected engine for a query).

If the value is set, the user can set a timeout between 0 and max_request_timeout using
<[number] or timeout_limit query parameter.

Related to #1077
Updated version of PR #1413 from @isj-privacore

4 files changed, 16 insertions, 3 deletions

diff --git a/searx/templates/oscar/results.html b/searx/templates/oscar/results.html
index f712e5779..ce557daf9 100644
--- a/searx/templates/oscar/results.html
+++ b/searx/templates/oscar/results.html
@@ -5,6 +5,7 @@
     <input type="hidden" name="pageno" value="{{ pageno }}" />

     <input type="hidden" name="time_range" value="{{ time_range }}" />

     <input type="hidden" name="language" value="{{ current_language }}" />

+    <input type="hidden" name="timeout_limit" value="{{ timeout_limit }}" />

 {%- endmacro %}

 {%- macro search_url() %}{{ base_url }}?q={{ q|urlencode }}{% if selected_categories %}&amp;categories={{ selected_categories|join(",") | replace(' ','+') }}{% endif %}{% if pageno > 1 %}&amp;pageno={{ pageno }}{% endif %}{% if time_range %}&amp;time_range={{ time_range }}{% endif %}{% if current_language != 'all' %}&amp;language={{ current_language }}{% endif %}{% endmacro -%}

 

diff --git a/searx/templates/simple/infobox.html b/searx/templates/simple/infobox.html
index d99806ac4..50b568919 100644
--- a/searx/templates/simple/infobox.html
+++ b/searx/templates/simple/infobox.html
@@ -36,6 +36,11 @@
       {% for suggestion in topic.suggestions %}
       <form method="{{ method or 'POST' }}" action="{{ url_for('index') }}">
         <input type="hidden" name="q" value="{{ suggestion }}">
+        <input type="hidden" name="time_range" value="{{ time_range }}">
+        <input type="hidden" name="language" value="{{ current_language }}">
+        <input type="hidden" name="safesearch" value="{{ safesearch }}">
+        <input type="hidden" name="theme" value="{{ theme }}">
+        {% if timeout_limit %}<input type="hidden" name="timeout_limit" value="{{ timeout_limit|e }}" >{% endif %}
         <input type="submit" value="{{ suggestion }}" />
       </form>
       {% endfor %}
diff --git a/searx/templates/simple/results.html b/searx/templates/simple/results.html
index a8e899e57..770eebe81 100644
--- a/searx/templates/simple/results.html
+++ b/searx/templates/simple/results.html
@@ -51,9 +51,11 @@
             {% for suggestion in suggestions %}
             <form method="{{ method or 'POST' }}" action="{{ url_for('index') }}">
               <input type="hidden" name="q" value="{{ suggestion.url }}">
+              <input type="hidden" name="time_range" value="{{ time_range }}">
               <input type="hidden" name="language" value="{{ current_language }}">
               <input type="hidden" name="safesearch" value="{{ safesearch }}">
               <input type="hidden" name="theme" value="{{ theme }}">
+              {% if timeout_limit %}<input type="hidden" name="timeout_limit" value="{{ timeout_limit|e }}" >{% endif %}
               <input type="submit" class="suggestion" value="&bull; {{ suggestion.title }}">
             </form>
             {% endfor %}
@@ -63,7 +65,7 @@
 
         <div id="search_url">
             <h4 class="title">{{ _('Search URL') }} :</h4>
-            <div class="selectable_url"><pre>{{ base_url }}?q={{ q|urlencode }}&amp;language={{ current_language }}&amp;time_range={{ time_range }}&amp;safesearch={{ safesearch }}{% if pageno > 1 %}&amp;pageno={{ pageno }}{% endif %}{% if selected_categories %}&amp;categories={{ selected_categories|join(",") | replace(' ','+') }}{% endif %}</pre></div>
+            <div class="selectable_url"><pre>{{ base_url }}?q={{ q|urlencode }}&amp;language={{ current_language }}&amp;time_range={{ time_range }}&amp;safesearch={{ safesearch }}{% if pageno > 1 %}&amp;pageno={{ pageno }}{% endif %}{% if selected_categories %}&amp;categories={{ selected_categories|join(",") | replace(' ','+') }}{% endif %}{% if timeout_limit %}&amp;timeout_limit={{ timeout_limit|urlencode }}{% endif %}</pre></div>
         </div>
         <div id="apis">
           <h4 class="title">{{ _('Download results') }}</h4>
@@ -79,6 +81,7 @@
               <input type="hidden" name="language" value="{{ current_language }}">
               <input type="hidden" name="safesearch" value="{{ safesearch }}">
               <input type="hidden" name="format" value="{{ output_type }}">
+              {% if timeout_limit %}<input type="hidden" name="timeout_limit" value="{{ timeout_limit|e }}" >{% endif %}
               <input type="submit" value="{{ output_type }}">
             </form>
 	  </div>
@@ -97,6 +100,7 @@
           <input type="hidden" name="language" value="{{ current_language }}">
           <input type="hidden" name="safesearch" value="{{ safesearch }}">
           <input type="hidden" name="theme" value="{{ theme }}">
+          {% if timeout_limit %}<input type="hidden" name="timeout_limit" value="{{ timeout_limit }}" >{% endif %}
           <input type="submit" value="{{ correction }}">
 	</form>
       </div>
@@ -134,7 +138,8 @@
                   <input type="hidden" name="language" value="{{ current_language }}" >
                   <input type="hidden" name="safesearch" value="{{ safesearch }}" >
                   <input type="hidden" name="theme" value="{{ theme }}" >
-		  <button type="submit">{{ icon_small('chevron-left') }} {{ _('previous page') }}</button>
+                  {% if timeout_limit %}<input type="hidden" name="timeout_limit" value="{{ timeout_limit|e }}" >{% endif %}
+                  <button type="submit">{{ icon_small('chevron-left') }} {{ _('previous page') }}</button>
                 </div>
             </form>
         {% endif %}
@@ -149,7 +154,8 @@
               <input type="hidden" name="language" value="{{ current_language }}" >
               <input type="hidden" name="safesearch" value="{{ safesearch }}" >
               <input type="hidden" name="theme" value="{{ theme }}" >
-	       <button type="submit">{{ _('next page') }} {{ icon_small('chevron-right') }}</button>
+              {% if timeout_limit %}<input type="hidden" name="timeout_limit" value="{{ timeout_limit|e }}" >{% endif %}
+              <button type="submit">{{ _('next page') }} {{ icon_small('chevron-right') }}</button>
             </div>
         </form>
     </nav>
diff --git a/searx/templates/simple/search.html b/searx/templates/simple/search.html
index 9c4a99b68..e9023b420 100644
--- a/searx/templates/simple/search.html
+++ b/searx/templates/simple/search.html
@@ -14,4 +14,5 @@
   {% include 'simple/categories.html' %}
   <input type="hidden" name="safesearch" value="{{ safesearch }}" >
   <input type="hidden" name="theme" value="{{ theme }}" >
+  {% if timeout_limit %}<input type="hidden" name="timeout_limit" value="{{ timeout_limit|e }}" >{% endif %}
 </form>