Github user shinrich commented on the issue:
https://github.com/apache/trafficserver/pull/1271
Yes, this looks like the correct change to me. We should be checking that
there is more data on the ua_buffer_reader. In this case, there should always
be data on the ua_raw_buffer_reader, so we will be incorrectly blind tunneling
GET requests without keep alive enabled. (I think).
We only want to flip to tunnel mode if there is data after the already
parsed header which would be reflected by the ua_buffer_reader.
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