[raju-mechatronics]

Summary

Adds two new methods to Context that expose which handler in the chain called Abort(), enabling better observability and conditional logic in middleware.

New API

// AbortedByHandler returns the HandlerFunc that called Abort(), or nil if not aborted by a handler.
func (c *Context) AbortedByHandler() HandlerFunc

// AbortedBy returns the name of the handler that called Abort(), or "" if not applicable.
func (c *Context) AbortedBy() string

Behavior

• First-abort-wins: if Abort() is called multiple times, only the first caller is recorded.
• Returns nil/"" when the context was not aborted
• Copy() preserves the tracked abort origin.
• reset() clears it on context reuse.

Use Cases

// Logging
func Logger() gin.HandlerFunc {
    return func(c *gin.Context) {
        c.Next()
        if c.IsAborted() {
            log.Printf("request aborted by: %s", c.AbortedBy())
        }
    }
}

// Observability
span.SetAttribute("gin.aborted_by", c.AbortedBy())

// Conditional error handling
if c.IsAborted() && c.AbortedBy() == "authMiddleware" {
    // handle auth rejections differently
}

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 98.65%. Comparing base (0f09c3a) to head (6063f34).

Additional details and impacted files

@@           Coverage Diff           @@
##           master    #4701   +/-   ##
=======================================
  Coverage   98.65%   98.65%           
=======================================
  Files          48       48           
  Lines        3188     3201   +13     
=======================================
+ Hits         3145     3158   +13     
  Misses         43       43           

Flag	Coverage Δ
--ldflags="-checklinkname=0" -tags sonic	98.64% <100.00%> (+<0.01%)	⬆️
-tags go_json	98.58% <100.00%> (+<0.01%)	⬆️
-tags nomsgpack	98.63% <100.00%> (+<0.01%)	⬆️
go-1.26	98.34% <100.00%> (+<0.01%)	⬆️
go-1.27	98.67% <100.00%> (+<0.01%)	⬆️
macos-latest	98.65% <100.00%> (+<0.01%)	⬆️
ubuntu-latest	98.65% <100.00%> (+<0.01%)	⬆️

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[FarmerChillax]

// Observability
span.SetAttribute("gin.aborted_by", c.AbortedBy())

same to add this to otel-gin?

[raju-mechatronics]

// Observability
span.SetAttribute("gin.aborted_by", c.AbortedBy())

same to add this to otel-gin?

Good point. Let's see if this PR merges first.

[raju-mechatronics]

@appleboy can you please take a look at it?