Fix redirectSlash bug

[thinkerou]

fixes #2959 fixes #2282 fixes #2211

code from https://github.com/julienschmidt/httprouter/pull/342

please review @appleboy thanks!

[codecov[bot]]

Codecov Report

Merging #3227 (3b8c932) into master (12b55b4) will increase coverage by 0.16%. The diff coverage is 100.00%.

@@            Coverage Diff             @@
##           master    #3227      +/-   ##
==========================================
+ Coverage   98.22%   98.38%   +0.16%     
==========================================
  Files          43       43              
  Lines        3148     3153       +5     
==========================================
+ Hits         3092     3102      +10     
+ Misses         44       38       -6     
- Partials       12       13       +1     

Flag	Coverage Δ
go-1.14	?
go-1.15	98.38% <100.00%> (+0.32%)	:arrow_up:
go-1.16	98.35% <100.00%> (+0.32%)	:arrow_up:
go-1.17	98.28% <100.00%> (+0.32%)	:arrow_up:
go-1.18	98.28% <100.00%> (+0.32%)	:arrow_up:
macos-latest	98.38% <100.00%> (+0.16%)	:arrow_up:
nomsgpack	98.35% <100.00%> (+0.16%)	:arrow_up:
ubuntu-latest	98.38% <100.00%> (+0.16%)	:arrow_up:

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ
tree.go	100.00% <100.00%> (ø)
debug.go	91.66% <0.00%> (-8.34%)	:arrow_down:
context.go	98.46% <0.00%> (+1.70%)	:arrow_up:

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[thinkerou]

please review @appleboy thanks!

[delameter]

hope this will be merged soon, our team is having difficulties in a production environment because of this bug

[appleboy]

@thinkerou maybe create a new tag for a bug fix?

[dkoszkul]

@thinkerou, @appleboy our team is also waiting for this fix. Creating new version would be very helpful. Thanks

[thinkerou]

@thinkerou maybe create a new tag for a bug fix?

yes 👍

[dhawton]

Also waiting on this.

[appleboy]

we will release the feature in v1.8.2

[appleboy]

@thinkerou See the milestone: https://github.com/gin-gonic/gin/milestone/23

[appleboy]

https://github.com/gin-gonic/gin/releases/tag/v1.8.2