added some assertions

2 files changed, 6 insertions, 0 deletions

diff --git a/wsgitools/scgi/asynchronous.py b/wsgitools/scgi/asynchronous.py
index 9510b4d..ff226de 100644
--- a/wsgitools/scgi/asynchronous.py
+++ b/wsgitools/scgi/asynchronous.py
@@ -130,6 +130,8 @@ class SCGIConnection(asyncore.dispatcher):
                 self.inbuff = ""
 
     def start_response(self, status, headers, exc_info=None):
+        assert isinstance(status, str)
+        assert isinstance(headers, list)
         if exc_info:
             if self.outheaders == True:
                 try:
diff --git a/wsgitools/scgi/forkpool.py b/wsgitools/scgi/forkpool.py
index 1ff2bee..6476458 100644
--- a/wsgitools/scgi/forkpool.py
+++ b/wsgitools/scgi/forkpool.py
@@ -85,6 +85,7 @@ class SCGIServer:
         maxworkers is the maximum number of workers that can be spawned on demand
         maxrequests is the number of requests a worker processes before dying
         """
+        assert hasattr(error, "write")
         self.wsgiapp = wsgiapp
         self.port = port
         self.interface = interface
@@ -217,7 +218,10 @@ class SCGIServer:
             "wsgi.multithread": False,
             "wsgi.multiprocess": True,
             "wsgi.run_once": False})
+
         result = self.wsgiapp(environ, start_response)
+        assert hasattr(result, "__iter__")
+
         for data in result:
             con.send(data)
         if hasattr(result, "close"):