Fix Rest protocol

[Patrick0308]

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-io]

Codecov Report

Merging #387 into feature/rest will decrease coverage by 0.12%.
The diff coverage is n/a.

@@               Coverage Diff                @@
##           feature/rest     #387      +/-   ##
================================================
- Coverage          66.9%   66.78%   -0.13%     
================================================
  Files               158      158              
  Lines              8230     8230              
================================================
- Hits               5506     5496      -10     
- Misses             2200     2209       +9     
- Partials            524      525       +1

Impacted Files	Coverage Δ
common/extension/rest_server.go	0% <ø> (ø)	⬆️
common/extension/rest_config_reader.go	0% <ø> (ø)	⬆️
common/extension/rest_client.go	0% <ø> (ø)	⬆️
config_center/nacos/facade.go	37.5% <0%> (-25%)	⬇️
config_center/nacos/client.go	55.55% <0%> (-1.71%)	⬇️

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