enforce running multi-input on the proxy

Now, multi-input storlet(with 'X-Storlet-Extra-Resources') runs
on object-server side.
but it causes that specified extra resources get ignored,
as current object-server does not support X-Storlet-Extra-Resources.

This patch forces multi-input storlet to run on proxy-server side.

Change-Id: I7fc2e72c3f39b5461f502ef314d0aba5686aa3f7
Closes-Bug: #1657044

storlets/swift_middleware/handlers/base.py

@@ -307,7 +307,8 @@ class StorletBaseHandler(object):
         r = self.request.headers['X-Storlet-Range']
         return len(Range(r).ranges) > 1
 
-    def _has_run_on_proxy_header(self):
+    @property
+    def has_run_on_proxy_header(self):
         """
         Check whether there is a header mandating storlet execution on proxy
 
@@ -320,9 +321,23 @@ class StorletBaseHandler(object):
             return True
         return False
 
+    @property
+    def has_extra_resources_header(self):
+        """
+        Check whether the client specifies multi input storlet execution.
+
+        If the request contains 'X-Storlet-Extra-Resources' header,
+        Storlets gathers multiple object data into the place, which
+        currently should happen in proxy-server.
+
+        :return: Whether the request contains X-Storlet-Extra-Resources header
+        """
+        return 'X-Storlet-Extra-Resources' in self.request.headers
+
     @property
     def execute_on_proxy(self):
-        return (self._has_run_on_proxy_header() or
+        return (self.has_run_on_proxy_header or
+                self.has_extra_resources_header or
                 self.storlet_execute_on_proxy)
 
     @property

tests/functional/java/test_multiinput_storlet.py

@@ -19,9 +19,10 @@ import unittest
 from hashlib import md5
 
 
-class TestMultiInputStorletOnProxy(StorletJavaFunctionalTest):
+class TestMultiInputStorlet(StorletJavaFunctionalTest):
     def setUp(self):
-        super(TestMultiInputStorletOnProxy, self).setUp(
+        self.additional_headers = {}
+        super(TestMultiInputStorlet, self).setUp(
             storlet_dir='MultiInputStorlet',
             storlet_name='multiinputstorlet-1.0.jar',
             storlet_main='org.openstack.storlet.multiinput.MultiInputStorlet',
@@ -45,6 +46,7 @@ class TestMultiInputStorletOnProxy(StorletJavaFunctionalTest):
             '/%s/%s' % (self.container, obj2),
             'X-Storlet-Run-On-Proxy': ''
         }
+        headers.update(self.additional_headers)
 
         resp_headers, resp_content = c.get_object(
             self.url, self.token, self.container, obj,
@@ -72,6 +74,7 @@ class TestMultiInputStorletOnProxy(StorletJavaFunctionalTest):
             'X-Storlet-Extra-Resources':
             '/%s/%s' % (self.container, obj2),
         }
+        headers.update(self.additional_headers)
 
         expected_string = '0123456789abcdefghijklmnopqr'
         etag = c.put_object(
@@ -90,5 +93,11 @@ class TestMultiInputStorletOnProxy(StorletJavaFunctionalTest):
         self.assertEqual('value2', resp_headers['x-object-meta-key2'])
 
 
+class TestMultiInputStorletOnProxy(TestMultiInputStorlet):
+    def setUp(self):
+        super(TestMultiInputStorletOnProxy, self).setUp()
+        self.additional_headers = {'X-Storlet-Run-On-Proxy': ''}
+
+
 if __name__ == '__main__':
     unittest.main()

tests/unit/swift_middleware/handlers/test_proxy.py

@@ -182,7 +182,6 @@ class TestStorletMiddlewareProxy(BaseTestStorletMiddleware):
 
         with storlet_enabled():
             headers = {'X-Run-Storlet': 'Storlet-1.0.jar',
-                       'X-Storlet-Run-On-Proxy': '',
                        'X-Storlet-Extra-Resources': '/c2/o2'}
             resp = self.get_request_response(target, 'GET', headers=headers)
             self.assertEqual('200 OK', resp.status)