polish trace

[tydhot]

What this PR does:

Which issue(s) this PR fixes:

Fixes #

Special notes for your reviewer:

Does this PR introduce a user-facing change?:

[codecov-commenter]

Codecov Report

Merging #257 (ca37b8b) into develop (32e944a) will increase coverage by 0.24%.
The diff coverage is 0.00%.

@@             Coverage Diff             @@
##           develop     #257      +/-   ##
===========================================
+ Coverage    39.51%   39.75%   +0.24%     
===========================================
  Files           50       50              
  Lines         2584     2568      -16     
===========================================
  Hits          1021     1021              
+ Misses        1452     1436      -16     
  Partials       111      111              

Impacted Files	Coverage Δ
pkg/client/http/http.go	42.16% <0.00%> (-1.05%)	⬇️
pkg/context/http/util.go	0.00% <ø> (ø)

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[ztelur]

because some legacy issue of code, should the change of pkg/client/http/http.go also apply to filter/http/httpproxy/routerfilter.go too ?

[tydhot]

because some legacy issue of code, should the change of pkg/client/http/http.go also apply to filter/http/httpproxy/routerfilter.go too ?

In this PR, I just optimize the trace code in the existing project. Idk why filter/http/httpproxy/routerfilter.go didn't have any trace code. Maybe should it add in this file?

[xiaoliu10]

拆分import 块 分为 语言的, 本项目的, 外部引用的

[mark4z]

There are a tool to fix it,see "tools" in dubbo-go profile

[tydhot]

got it