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Diffstat (limited to 'libmproxy/protocol2/tls.py')
| -rw-r--r-- | libmproxy/protocol2/tls.py | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/libmproxy/protocol2/tls.py b/libmproxy/protocol2/tls.py index ce684eb9..7ef0ad8c 100644 --- a/libmproxy/protocol2/tls.py +++ b/libmproxy/protocol2/tls.py @@ -162,7 +162,10 @@ class TlsLayer(Layer): # If the server only supports spdy (next to http/1.1), it may select that # and mitmproxy would enter TCP passthrough mode, which we want to avoid. deprecated_http2_variant = lambda x: x.startswith("h2-") or x.startswith("spdy") - alpn = filter(lambda x: not deprecated_http2_variant(x), self.client_alpn_protocols) + if self.client_alpn_protocols: + alpn = filter(lambda x: not deprecated_http2_variant(x), self.client_alpn_protocols) + else: + alpn = None self.server_conn.establish_ssl( self.config.clientcerts, |