2 files changed, 69 insertions, 0 deletions
diff --git a/searx/plugins/__init__.py b/searx/plugins/__init__.py
new file mode 100644
index 000000000..1cc232560
--- /dev/null
+++ b/searx/plugins/__init__.py
@@ -0,0 +1,48 @@
+from searx.plugins import self_ip
+from searx import logger
+from sys import exit
+
+logger = logger.getChild('plugins')
+
+required_attrs = (('name', str),
+                  ('description', str),
+                  ('default_on', bool))
+
+
+class Plugin():
+    default_on = False
+    name = 'Default plugin'
+    description = 'Default plugin description'
+
+
+class PluginStore():
+
+    def __init__(self):
+        self.plugins = []
+
+    def __iter__(self):
+        for plugin in self.plugins:
+            yield plugin
+
+    def register(self, *plugins):
+        for plugin in plugins:
+            for plugin_attr, plugin_attr_type in required_attrs:
+                if not hasattr(plugin, plugin_attr) or not isinstance(getattr(plugin, plugin_attr), plugin_attr_type):
+                    logger.critical('missing attribute "{0}", cannot load plugin: {1}'.format(plugin_attr, plugin))
+                    exit(3)
+            plugin.id = plugin.name.replace(' ', '_')
+            self.plugins.append(plugin)
+
+    def call(self, plugin_type, request, *args, **kwargs):
+        ret = True
+        for plugin in request.user_plugins:
+            if hasattr(plugin, plugin_type):
+                ret = getattr(plugin, plugin_type)(request, *args, **kwargs)
+                if not ret:
+                    break
+
+        return ret
+
+
+plugins = PluginStore()
+plugins.register(self_ip)
diff --git a/searx/plugins/self_ip.py b/searx/plugins/self_ip.py
new file mode 100644
index 000000000..0353be79a
--- /dev/null
+++ b/searx/plugins/self_ip.py
@@ -0,0 +1,21 @@
+from flask.ext.babel import gettext
+name = "Self IP"
+description = gettext('Display your source IP address if the query expression is "ip"')
+default_on = True
+
+
+# attach callback to the pre search hook
+#  request: flask request object
+#  ctx: the whole local context of the pre search hook
+def pre_search(request, ctx):
+    if ctx['search'].query == 'ip':
+        x_forwarded_for = request.headers.getlist("X-Forwarded-For")
+        if x_forwarded_for:
+            ip = x_forwarded_for[0]
+        else:
+            ip = request.remote_addr
+        ctx['search'].answers.clear()
+        ctx['search'].answers.add(ip)
+        # return False prevents exeecution of the original block
+        return False
+    return True