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-rw-r--r--libmproxy/protocol2/root_context.py2
1 files changed, 1 insertions, 1 deletions
diff --git a/libmproxy/protocol2/root_context.py b/libmproxy/protocol2/root_context.py
index 9b18f0aa..d0c62be4 100644
--- a/libmproxy/protocol2/root_context.py
+++ b/libmproxy/protocol2/root_context.py
@@ -41,7 +41,7 @@ class RootContext(object):
d = top_layer.client_conn.rfile.peek(3)
is_ascii = (
len(d) == 3 and
- all(x in string.ascii_uppercase for x in d)
+ all(x in string.ascii_letters for x in d) # better be safe here and don't expect uppercase...
)
d = top_layer.client_conn.rfile.peek(len(HTTP2Protocol.CLIENT_CONNECTION_PREFACE))