sendfile support

When a sendfile library is available, expose it via wsgi.file_wrapper.
This support spans both asynchronous and forkpool.

1 files changed, 13 insertions, 7 deletions

diff --git a/wsgitools/scgi/forkpool.py b/wsgitools/scgi/forkpool.py
index aa316d1..cdd50f0 100644
--- a/wsgitools/scgi/forkpool.py
+++ b/wsgitools/scgi/forkpool.py
@@ -12,7 +12,7 @@ import sys
 import errno
 import signal
 
-from wsgitools.scgi import _convert_environ
+from wsgitools.scgi import _convert_environ, FileWrapper
 
 if sys.version_info[0] >= 3:
     def exc_info_for_raise(exc_info):
@@ -444,13 +444,19 @@ class SCGIServer:
         result = self.wsgiapp(environ, start_response)
         assert hasattr(result, "__iter__")
 
-        assert response_head[0] is not None
-        result_iter = iter(result)
-        for data in result_iter:
-            assert isinstance(data, str)
-            dumbsend(data)
-        if response_head[0] != True:
+        if isinstance(result, FileWrapper) and result.can_transfer():
             sendheaders()
+            sent = 1
+            while sent > 0:
+                sent = result.transfer(con)
+        else:
+            assert response_head[0] is not None
+            result_iter = iter(result)
+            for data in result_iter:
+                assert isinstance(data, str)
+                dumbsend(data)
+            if response_head[0] != True:
+                sendheaders()
         if hasattr(result, "close"):
             result.close()
         sfw.close()