[coro_http]update and fix #890

Job	Run time
ubuntu_clang (Release, OFF, ON)	5m 29s
ubuntu_clang (Release, OFF, OFF)	5m 5s
ubuntu_clang (Debug, OFF, ON)	4m 49s
ubuntu_clang (Debug, OFF, OFF)	4m 45s
ubuntu_clang_for_liburing (Release, OFF, ON)	3m 12s
ubuntu_clang_for_liburing (Debug, OFF, ON)	3m 3s
ubuntu_clang_pb (Release, OFF, ON)	2m 40s
ubuntu_clang_pb (Release, OFF, OFF)	2m 38s
ubuntu_clang_pb (Debug, OFF, ON)	2m 32s
ubuntu_clang_pb (Debug, OFF, OFF)	2m 25s
ubuntu_clang10 (Release)	2m 25s
ubuntu_clang10 (Debug)	1m 47s
	40m 50s

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