Only set HTTP1 when HTTP/2 Prior Knowledge flag is false in buf curl
#4036
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edaniels
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@emcfarlane tagging you on this since you'll probably have the most context. Thanks! |
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LGTM @edaniels |
doriable
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Oct 7, 2025
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Thank you for putting up the fix, left a comment with a suggested change!
doriable
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This looks reasonable to me, before approving, I'm going to let @emcfarlane a chance to go over this as well. |
doriable
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Oct 8, 2025
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doriable
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Approving and merging, thank you!
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As of v1.57.2, calling
~/go/bin/buf curl -vvvvvv --debug --http2-prior-knowledge --protocol grpc http://127.0.0.1:55555 --list-methodswould result in the TLS handshake hanging. After bisecting down to v1.57.1 being the first bad tag, I found the regression here 2d0ab7a#diff-05c240e5d4191f595d5b747c112c314cf14ee4d77505cee99aac9500eed39527L1135-R1144. I think there are lacking test cases for the buf curl command (unless you have some other acceptance test suite internally), so this was an easy miss. With this, we should be back to insecurely calling gRPC server methods 8).