fix more bytes related issues not covered by test.py

 * applications returned errors as str instead of bytes
 * filters documentation updated with bytes
 * various filters expecting str where bytes are passed
 * escape_string also needs to use bytes.isalnum instead of str.isalnum
 * middlewares injecting str where bytes are expected

1 files changed, 4 insertions, 4 deletions

diff --git a/wsgitools/middlewares.py b/wsgitools/middlewares.py
index 725deb1..4061d3b 100644
--- a/wsgitools/middlewares.py
+++ b/wsgitools/middlewares.py
@@ -33,7 +33,7 @@ class SubdirMiddleware:
     def __call__(self, environ, start_response):
         """wsgi interface
         @type environ: {str: str}
-        @rtype: gen([str])
+        @rtype: gen([bytes])
         """
         assert isinstance(environ, dict)
         app = None
@@ -65,7 +65,7 @@ class NoWriteCallableMiddleware:
     def __call__(self, environ, start_response):
         """wsgi interface
         @type environ: {str, str}
-        @rtype: gen([str])
+        @rtype: gen([bytes])
         """
         assert isinstance(environ, dict)
         todo = [None]
@@ -89,7 +89,7 @@ class NoWriteCallableMiddleware:
         ret = self.app(environ, modified_start_response)
         assert hasattr(ret, "__iter__")
 
-        first = ""
+        first = b""
         if not isinstance(ret, list):
             ret = iter(ret)
             stopped = False
@@ -171,7 +171,7 @@ class ContentLengthMiddleware:
             return ret
 
         ret = iter(ret)
-        first = ""
+        first = b""
         stopped = False
         while not (first or stopped):
             try: