prefer to use r#type and simplify code

[zh-jq]

No description provided.

[codecov]

Codecov Report

Attention: Patch coverage is 53.84615% with 66 lines in your changes missing coverage. Please review.

Project coverage is 55.06%. Comparing base (6ef967f) to head (b4a6fa7).
Report is 1 commits behind head on master.

Files with missing lines	Patch %	Lines
g3proxy/src/serve/dummy_close/server.rs	0.00%	5 Missing ⚠️
g3proxy/src/serve/plain_quic_port/mod.rs	0.00%	4 Missing ⚠️
g3proxy/src/serve/tcp_tproxy/server.rs	0.00%	4 Missing ⚠️
g3proxy/src/escape/comply_audit/mod.rs	0.00%	2 Missing ⚠️
g3proxy/src/escape/divert_tcp/mod.rs	0.00%	2 Missing ⚠️
g3proxy/src/escape/dummy_deny/mod.rs	0.00%	2 Missing ⚠️
g3proxy/src/escape/route_client/mod.rs	0.00%	2 Missing ⚠️
g3proxy/src/escape/route_mapping/mod.rs	0.00%	2 Missing ⚠️
g3proxy/src/serve/http_proxy/server.rs	50.00%	2 Missing ⚠️
g3proxy/src/serve/http_rproxy/server.rs	50.00%	2 Missing ⚠️
... and 31 more

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #664      +/-   ##
==========================================
- Coverage   55.08%   55.06%   -0.03%     
==========================================
  Files        1194     1194              
  Lines      111081   111004      -77     
==========================================
- Hits        61188    61119      -69     
+ Misses      49893    49885       -8     

Flag	Coverage Δ
g3bench	33.52% <0.00%> (ø)
g3proxy	53.92% <53.84%> (-0.03%)	⬇️
lib	25.86% <0.00%> (ø)

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