fix isue #2976, to be compatible with bad response type definition for strict route function

[gqcn]

No description provided.

[codecov-commenter]

Codecov Report

Patch coverage: 100.00% and project coverage change: +0.26% 🎉

Comparison is base (5219c5c) 79.08% compared to head (7619287) 79.34%.
Report is 5 commits behind head on master.

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Additional details and impacted files

@@            Coverage Diff             @@
##           master    #2977      +/-   ##
==========================================
+ Coverage   79.08%   79.34%   +0.26%     
==========================================
  Files         643      643              
  Lines       52744    52815      +71     
==========================================
+ Hits        41710    41906     +196     
+ Misses       8952     8824     -128     
- Partials     2082     2085       +3     

Flag	Coverage Δ
go-1.18-386	79.42% <100.00%> (?)
go-1.18-amd64	79.42% <100.00%> (+0.33%)	⬆️
go-1.19-386	79.31% <100.00%> (+0.32%)	⬆️
go-1.19-amd64	79.32% <100.00%> (+0.27%)	⬆️
go-1.20-386	79.29% <100.00%> (?)
go-1.20-amd64	79.42% <100.00%> (+0.26%)	⬆️
go-1.21-386	79.38% <100.00%> (+0.29%)	⬆️
go-1.21-amd64	79.43% <100.00%> (+0.33%)	⬆️

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Files Changed	Coverage Δ
net/ghttp/ghttp_server_service_handler.go	64.23% <100.00%> (+0.97%)	⬆️

... and 48 files with indirect coverage changes

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[WankkoRee]

还原了 #2850 ，所以我认为没问题。