Optimize log print and make ws requests different from other restful requests.

[little-cui]

No description provided.

[coveralls]

Coverage increased (+0.1%) to 71.925% when pulling 0f3bfd1 on little-cui:master into bf3b910 on ServiceComb:master.

[codecov-io]

Codecov Report

Merging #204 into master will increase coverage by 0.02%.
The diff coverage is n/a.

@@            Coverage Diff            @@
##           master    #204      +/-   ##
=========================================
+ Coverage   68.17%   68.2%   +0.02%     
=========================================
  Files          17      17              
  Lines        3570    3570              
=========================================
+ Hits         2434    2435       +1     
  Misses        963     963              
+ Partials      173     172       -1

Impacted Files	Coverage Δ
server/service/tag.go	74.41% <0%> (+0.58%)	⬆️

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