1 files changed, 19 insertions, 0 deletions
diff --git a/wsgitools/internal.py b/wsgitools/internal.py
new file mode 100644
index 0000000..c4f1da1
--- /dev/null
+++ b/wsgitools/internal.py
@@ -0,0 +1,19 @@
+if bytes is str:
+    def bytes2str(bstr):
+        assert isinstance(bstr, bytes)
+        return bstr
+    def str2bytes(sstr):
+        assert isinstance(sstr, str)
+        return sstr
+    def textopen(filename, mode):
+        return open(filename, mode)
+else:
+    def bytes2str(bstr):
+        assert isinstance(bstr, bytes)
+        return bstr.decode("iso-8859-1") # always successful
+    def str2bytes(sstr):
+        assert isinstance(sstr, str)
+        return sstr.encode("iso-8859-1") # might fail, but spec says it doesn't
+    def textopen(filename, mode):
+        # We use the same encoding as for all wsgi strings here.
+        return open(filename, mode, encoding="iso-8859-1")