Add nginx path_prefix in proxy_pass (#871)

* Add path_prefix field for nginx plugin
* Add path_prefix ngninx plugin
* Update Nginx.xml
* Update location.xml
* Update index.volt
* Update SettingsController.php
* review comments

www/nginx/src/opnsense/mvc/app/controllers/OPNsense/Nginx/Api/SettingsController.php

@@ -147,7 +147,7 @@ class SettingsController extends ApiMutableModelControllerBase
     // Location
     public function searchlocationAction()
     {
-        return $this->searchBase('location', array('description','urlpattern', 'matchtype', 'enable_secrules', 'force_https'));
+        return $this->searchBase('location', array('description','urlpattern', 'path_prefix', 'matchtype', 'enable_secrules', 'force_https'));
     }
 
     public function getlocationAction($uuid = null)

www/nginx/src/opnsense/mvc/app/controllers/OPNsense/Nginx/forms/location.xml

@@ -61,6 +61,12 @@
     <style>selectpicker</style>
     <help>Select an upstream to proxy to or connect via FastCGI if chosen.</help>
   </field>
+  <field>
+    <id>location.path_prefix</id>
+    <label>Path Prefix</label>
+    <type>text</type>
+    <help>Define an optional path prefix for this location. It will be prepended to the path so http://www.example.com/index.php will be sent to http://www.example.com/app/index.php on your upstream if you choose "/app" as path prefix.</help>
+  </field>
   <field>
     <id>location.cache_path</id>
     <label>Cache: Directory</label>

www/nginx/src/opnsense/mvc/app/models/OPNsense/Nginx/Nginx.xml

@@ -205,6 +205,10 @@
         <Required>N</Required>
         <multiple>N</multiple>
       </upstream>
+      <path_prefix type="TextField">
+        <Required>N</Required>
+        <mask>/^[^" \t]+$/</mask>
+      </path_prefix>
       <cache_path type="ModelRelationField">
         <Model>
           <template>

www/nginx/src/opnsense/mvc/app/views/OPNsense/Nginx/index.volt

@@ -188,6 +188,7 @@ $( document ).ready(function() {
             <tr>
                 <th data-column-id="description" data-type="string" data-sortable="true"  data-visible="true">{{ lang._('Description') }}</th>
                 <th data-column-id="urlpattern" data-type="string" data-sortable="true"  data-visible="true">{{ lang._('URL Pattern') }}</th>
+                <th data-column-id="path_prefix" data-type="string" data-sortable="true"  data-visible="true">{{ lang._('URL Path Prefix') }}</th>
                 <th data-column-id="matchtype" data-type="string" data-sortable="true"  data-visible="true">{{ lang._('Match Type') }}</th>
                 <th data-column-id="enable_secrules" data-type="boolean" data-sortable="true"  data-visible="true">{{ lang._('WAF Enabled') }}</th>
                 <th data-column-id="force_https" data-type="boolean" data-sortable="true"  data-visible="true">{{ lang._('Force HTTPS') }}</th>

www/nginx/src/opnsense/service/templates/OPNsense/Nginx/location.conf

@@ -107,8 +107,11 @@ location {{ location.matchtype }} {{ location.urlpattern }} {
     proxy_cache_revalidate {% if location.cache_revalidate is defined and location.cache_revalidate == '1' %}on{% else %}off{% endif %};
     proxy_cache_methods GET HEAD{% if location.cache_methods is defined and location.cache_methods != '' %} {{ location.cache_methods.replace(',', ' ') }}{% endif %};
 {% endif %}
-
+{% if location.path_prefix is defined and location.path_prefix != '' %}   
+    proxy_pass http{% if upstream.tls_enable == '1' %}s{% endif %}://upstream{{ location.upstream.replace('-','') }}{{ location.path_prefix }};
+{% else %}
     proxy_pass http{% if upstream.tls_enable == '1' %}s{% endif %}://upstream{{ location.upstream.replace('-','') }};
+{% endif %}
 {%   if upstream.tls_enable == '1' %}
 {%     if upstream.tls_client_certificate is defined and upstream.tls_client_certificate != '' %}
     proxy_ssl_certificate_key /usr/local/etc/nginx/key/{{ upstream.tls_client_certificate }}.key;