fix up timeout middleware #3826
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Note Other AI code review bot(s) detectedCodeRabbit has detected other AI code review bot(s) in this pull request and will avoid duplicating their findings in the review comments. This may lead to a less comprehensive review. WalkthroughThe timeout middleware was refactored to run handlers in a goroutine and use a select on the handler result channel vs. time.After. On timeout the middleware returns immediately (optionally invoking OnTimeout) and no longer uses context.WithTimeout or cancels the handler. Changes
Sequence Diagram(s)sequenceDiagram
participant Client
participant Middleware
participant Handler
rect rgb(220,255,220)
Note over Middleware: New async flow (goroutine + select)
Client->>Middleware: HTTP request
Middleware->>Handler: start handler in goroutine
Middleware->>Middleware: select { handler result | time.After(timeout) }
alt timeout fires first
Middleware-->>Client: return fiber.ErrRequestTimeout (invoke OnTimeout if set)
Note right of Handler: handler continues in background (not awaited)
else handler completes first
Handler-->>Middleware: result via channel
Middleware-->>Client: return handler result
end
end
Estimated code review effort🎯 4 (Complex) | ⏱️ ~45 minutes
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Summary of ChangesHello @pjebs, I'm Gemini Code Assist1! I'm currently reviewing this pull request and will post my feedback shortly. In the meantime, here's a summary to help you and other reviewers quickly get up to speed! This pull request significantly refactors the timeout middleware to enhance its robustness and control over request processing. The changes replace the previous Highlights
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Code Review
This pull request attempts to refactor the timeout middleware. However, the new implementation introduces a critical flaw by removing the use of context.WithTimeout, which can lead to leaked goroutines when a timeout occurs. The handler continues to run in the background even after a timeout response has been sent. My review focuses on fixing this by reintroducing a context-based cancellation mechanism combined with a non-blocking select pattern, which was likely the original intent of the refactor. I've also pointed out a minor issue in the test code where a line becomes unreachable due to the changes.
middleware/timeout/timeout.go
Outdated
| err := make(chan error) | ||
| go func() { | ||
| err <- h(ctx) | ||
| }() | ||
|
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||
| err := runHandler(ctx, h, cfg) | ||
|
|
||
| if errors.Is(tCtx.Err(), context.DeadlineExceeded) && err == nil { | ||
| if cfg.OnTimeout != nil { | ||
| return cfg.OnTimeout(ctx) | ||
| } | ||
| return fiber.ErrRequestTimeout | ||
| } | ||
| return err | ||
| } | ||
| } | ||
|
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||
| // runHandler executes the handler and returns fiber.ErrRequestTimeout if it | ||
| // sees a deadline exceeded error or one of the custom "timeout-like" errors. | ||
| func runHandler(c fiber.Ctx, h fiber.Handler, cfg Config) error { | ||
| err := h(c) | ||
| if err != nil && (errors.Is(err, context.DeadlineExceeded) || (len(cfg.Errors) > 0 && isCustomError(err, cfg.Errors))) { | ||
| if cfg.OnTimeout != nil { | ||
| if toErr := cfg.OnTimeout(c); toErr != nil { | ||
| return toErr | ||
| for { | ||
| select { | ||
| case err := <-err: | ||
| if err != nil && (len(cfg.Errors) > 0 && isCustomError(err, cfg.Errors)) { | ||
| if cfg.OnTimeout != nil { | ||
| if toErr := cfg.OnTimeout(ctx); toErr != nil { | ||
| return toErr | ||
| } | ||
| } | ||
| return fiber.ErrRequestTimeout | ||
| } | ||
| return err | ||
| case <-time.After(timeout): | ||
| if cfg.OnTimeout != nil { | ||
| err := cfg.OnTimeout(ctx) | ||
| ctx.RequestCtx().TimeoutErrorWithResponse(&ctx.RequestCtx().Response) | ||
| return err | ||
| } | ||
| ctx.RequestCtx().TimeoutErrorWithCode(utils.StatusMessage(fiber.StatusRequestTimeout), fiber.StatusRequestTimeout) | ||
| return fiber.ErrRequestTimeout | ||
| } | ||
| } |
There was a problem hiding this comment.
The new implementation introduces a critical issue: it can lead to leaked goroutines.
The handler h(ctx) is started in a new goroutine. If a timeout occurs in the select statement (case <-time.After(timeout)), the server will return a timeout response to the client, but the goroutine running the handler is not cancelled and will continue to run in the background until it completes. This can lead to resource exhaustion (e.g., holding database connections, memory) and unpredictable behavior, as the handler might complete its work even though the request has already timed out.
The previous implementation correctly used context.WithTimeout to create a context that would be cancelled on timeout. This cancellation signal could be propagated to the handler, allowing it to gracefully terminate its work.
To fix this, you should reintroduce context.WithTimeout and use its Done() channel in the select statement. This combines the non-blocking benefit of using a goroutine with the crucial cancellation signal for the handler.
Additionally, the for {} loop is redundant as every path in the select statement returns, meaning the loop will only execute once.
// Create a context that is cancelled when the timeout expires
parentCtx := ctx.Context()
tCtx, cancel := context.WithTimeout(parentCtx, timeout)
defer cancel()
// Set the new context for the handler
ctx.SetContext(tCtx)
// Restore the original context after the handler returns
defer ctx.SetContext(parentCtx)
errChan := make(chan error, 1)
go func() {
errChan <- h(ctx)
}()
select {
case err := <-errChan:
// Handler completed before timeout.
// We still need to check for custom timeout errors.
if err != nil && len(cfg.Errors) > 0 && isCustomError(err, cfg.Errors) {
if cfg.OnTimeout != nil {
return cfg.OnTimeout(ctx)
}
return fiber.ErrRequestTimeout
}
return err
case <-tCtx.Done():
// Timeout occurred.
if !errors.Is(tCtx.Err(), context.DeadlineExceeded) {
// Context was cancelled for a different reason.
return tCtx.Err()
}
// Deadline was exceeded.
if cfg.OnTimeout != nil {
return cfg.OnTimeout(ctx)
}
ctx.RequestCtx().TimeoutErrorWithCode(utils.StatusMessage(fiber.StatusRequestTimeout), fiber.StatusRequestTimeout)
return fiber.ErrRequestTimeout
}| package timeout | ||
|
|
||
| import ( | ||
| "context" |
There was a problem hiding this comment.
The context package was removed, but it's essential for correctly handling request timeouts and cancellations in Go. The new implementation without it introduces a critical bug (leaked goroutines). Please re-add the context import as it's required for the proper fix I've suggested in my other comment.
middleware/timeout/timeout_test.go
Outdated
| } | ||
| time.Sleep(100 * time.Millisecond) | ||
| return context.DeadlineExceeded | ||
| return c.SendString("should not reach") |
There was a problem hiding this comment.
This line is unreachable because the function will always return on the line above. It can be removed to improve code clarity.
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Actionable comments posted: 3
🧹 Nitpick comments (2)
middleware/timeout/timeout.go (1)
11-14: Doc comment is stale; implementation no longer replaces the request’s contextUpdate to reflect the async goroutine/select approach (no context.WithTimeout). This avoids misleading users.
middleware/timeout/timeout_test.go (1)
173-176: Remove unreachable code
return context.DeadlineExceededmakes the subsequentreturn c.SendString("should not reach")unreachable. Clean it up.- return context.DeadlineExceeded - return c.SendString("should not reach") + return context.DeadlineExceeded
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middleware/timeout/timeout.go(2 hunks)middleware/timeout/timeout_test.go(2 hunks)
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**/*.go
📄 CodeRabbit inference engine (AGENTS.md)
**/*.go: Apply formatting using gofumpt (Make target: format)
Optimize struct field alignment using betteralign (Make target: betteralign)
Modernize code using gopls modernize (Make target: modernize)
Files:
middleware/timeout/timeout.gomiddleware/timeout/timeout_test.go
🧬 Code graph analysis (2)
middleware/timeout/timeout.go (1)
constants.go (2)
ErrRequestTimeout(126-126)StatusRequestTimeout(81-81)
middleware/timeout/timeout_test.go (2)
middleware/timeout/config.go (1)
Config(10-26)constants.go (1)
ErrRequestTimeout(126-126)
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🔇 Additional comments (1)
middleware/timeout/timeout_test.go (1)
24-37: Test helper mirrors production logic; OK, but keep behavior in sync
runHandlerduplicates the custom‑error/OnTimeout flow. If production logic changes, update this helper to match to avoid false positives.
middleware/timeout/timeout.go
Outdated
| for { | ||
| select { | ||
| case err := <-err: | ||
| if err != nil && (len(cfg.Errors) > 0 && isCustomError(err, cfg.Errors)) { | ||
| if cfg.OnTimeout != nil { | ||
| if toErr := cfg.OnTimeout(ctx); toErr != nil { | ||
| return toErr | ||
| } | ||
| } | ||
| return fiber.ErrRequestTimeout | ||
| } | ||
| return err | ||
| case <-time.After(timeout): | ||
| if cfg.OnTimeout != nil { | ||
| err := cfg.OnTimeout(ctx) | ||
| ctx.RequestCtx().TimeoutErrorWithResponse(&ctx.RequestCtx().Response) | ||
| return err | ||
| } | ||
| ctx.RequestCtx().TimeoutErrorWithCode(utils.StatusMessage(fiber.StatusRequestTimeout), fiber.StatusRequestTimeout) | ||
| return fiber.ErrRequestTimeout | ||
| } | ||
| } |
There was a problem hiding this comment.
Simplify select; use a timer and stop it to avoid leaks; handle custom‑error path consistently
- The surrounding
foris unnecessary; both branches return. - Prefer
time.NewTimeranddefer timer.Stop()to avoid retaining timers when the handler finishes first. - When a custom “timeout-like” error occurs, consider freezing the response if
OnTimeoutwrote one, otherwise the default 408 handler may overwrite it.
- for {
- select {
- case err := <-err:
- if err != nil && (len(cfg.Errors) > 0 && isCustomError(err, cfg.Errors)) {
- if cfg.OnTimeout != nil {
- if toErr := cfg.OnTimeout(ctx); toErr != nil {
- return toErr
- }
- }
- return fiber.ErrRequestTimeout
- }
- return err
- case <-time.After(timeout):
- if cfg.OnTimeout != nil {
- err := cfg.OnTimeout(ctx)
- ctx.RequestCtx().TimeoutErrorWithResponse(&ctx.RequestCtx().Response)
- return err
- }
- ctx.RequestCtx().TimeoutErrorWithCode(utils.StatusMessage(fiber.StatusRequestTimeout), fiber.StatusRequestTimeout)
- return fiber.ErrRequestTimeout
- }
- }
+ timer := time.NewTimer(timeout)
+ defer timer.Stop()
+ select {
+ case err := <-errCh:
+ if err != nil && len(cfg.Errors) > 0 && isCustomError(err, cfg.Errors) {
+ if cfg.OnTimeout != nil {
+ if toErr := cfg.OnTimeout(ctx); toErr != nil {
+ // Preserve custom body written by OnTimeout.
+ ctx.RequestCtx().TimeoutErrorWithResponse(&ctx.RequestCtx().Response)
+ return toErr
+ }
+ // Freeze OnTimeout response to avoid default handler overwrite.
+ ctx.RequestCtx().TimeoutErrorWithResponse(&ctx.RequestCtx().Response)
+ return nil
+ }
+ ctx.RequestCtx().TimeoutErrorWithCode(utils.StatusMessage(fiber.StatusRequestTimeout), fiber.StatusRequestTimeout)
+ return fiber.ErrRequestTimeout
+ }
+ return err
+ case <-timer.C:
+ if cfg.OnTimeout != nil {
+ if toErr := cfg.OnTimeout(ctx); toErr != nil {
+ ctx.RequestCtx().TimeoutErrorWithResponse(&ctx.RequestCtx().Response)
+ return toErr
+ }
+ ctx.RequestCtx().TimeoutErrorWithResponse(&ctx.RequestCtx().Response)
+ return nil
+ }
+ ctx.RequestCtx().TimeoutErrorWithCode(utils.StatusMessage(fiber.StatusRequestTimeout), fiber.StatusRequestTimeout)
+ return fiber.ErrRequestTimeout
+ }Note: fasthttp requires calling TimeoutError* before returning when other goroutines still hold ctx; modifications after the call are ignored. This refactor maintains that guarantee. (pkg.go.dev)
Committable suggestion skipped: line range outside the PR's diff.
🤖 Prompt for AI Agents
In middleware/timeout/timeout.go around lines 32-53, remove the unnecessary
for-loop and replace the time.After usage with a time.NewTimer(timeout) stored
in a variable and defer timer.Stop() so timers aren't leaked; keep a single
select that returns from both branches. On the channel error branch, treat the
custom "timeout-like" error path consistently: when cfg.OnTimeout is set call it
and then, if it may have written a response, call
ctx.RequestCtx().TimeoutErrorWithResponse(&ctx.RequestCtx().Response) before
returning any error; if cfg.OnTimeout is nil but the error matches cfg.Errors
return fiber.ErrRequestTimeout. On the timer branch call cfg.OnTimeout if
present, then call
ctx.RequestCtx().TimeoutErrorWithResponse(&ctx.RequestCtx().Response) (or
TimeoutErrorWithCode(...) if no custom handler) before returning to guarantee
fasthttp freezes the response.
| if cfg.OnTimeout != nil { | ||
| err := cfg.OnTimeout(ctx) | ||
| ctx.RequestCtx().TimeoutErrorWithResponse(&ctx.RequestCtx().Response) | ||
| return err | ||
| } | ||
| ctx.RequestCtx().TimeoutErrorWithCode(utils.StatusMessage(fiber.StatusRequestTimeout), fiber.StatusRequestTimeout) | ||
| return fiber.ErrRequestTimeout |
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🧩 Analysis chain
Potential data race: OnTimeout writes to ctx while handler goroutine may still access it
Per fasthttp docs, it’s unsafe to modify/read RequestCtx from concurrent goroutines; only TimeoutError* may be called concurrently. Today, OnTimeout(ctx) mutates the response before TimeoutErrorWithResponse, possibly racing with h(ctx). Consider either:
- Building a separate
fasthttp.ResponseforOnTimeoutand passing that toTimeoutErrorWithResponse, or - Documenting that
OnTimeoutmust not modifyctx(log/metrics only), and callingTimeoutErrorWithCodefirst, or - Wrapping the handler to buffer writes (heavier change).
At minimum, add a package‑level note warning about this constraint. (pkg.go.dev)
I'll now verify the review comment by examining the code and fasthttp's concurrency constraints.
Now let me search for information about fasthttp's concurrency constraints:
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# Get the actual file that was changed in PR
git show --name-only 2>/dev/null | grep -i timeoutLength of output: 94
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['git', 'log', '--oneline', '-5'],
['git', 'branch', '-a'],
['git', 'diff', 'HEAD~1', '--stat'],
]
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🌐 Web query:
fasthttp RequestCtx concurrent goroutine access safety constraints
💡 Result:
Short answer
- RequestCtx is not safe for concurrent access. You must not read/modify a RequestCtx (or its Request/Response members) from multiple goroutines. [1][2]
Key constraints and recommendations
- Do not copy RequestCtx values. Copying is forbidden. [1][2]
- It is unsafe to modify/read RequestCtx from concurrently running goroutines. The only supported exception is calling ctx.TimeoutError() from another goroutine. [1][2]
- If you need to use request data after the handler returns (or from another goroutine), copy the data you need (e.g., header values, body bytes, or use Request.Copy/CopyTo patterns or make explicit copies) instead of keeping references to RequestCtx internals. If you cannot avoid holding references, call ctx.TimeoutError() before returning. [1][2]
- Prefer acquiring and releasing standalone Request/Response objects (AcquireRequest/ReleaseRequest) or copying values out to independent buffers when handing work to background goroutines. [1]
Sources
- fasthttp RequestCtx docs (pkg.go.dev). [1]
- valyala/fasthttp repository / README and issues (concurrency guidance). [2]
References
[1] https://pkg.go.dev/github.com/valyala/fasthttp
[2] https://github.com/valyala/fasthttp
🌐 Web query:
fasthttp TimeoutError concurrent access documentation
💡 Result:
Short answer: fasthttp’s RequestCtx is not safe for concurrent access — the only supported exception is calling RequestCtx.TimeoutError while other goroutines may still access the RequestCtx. Call TimeoutError before returning from your handler if other goroutines will use the context. [1][2][3]
Sources
- fasthttp docs on pkg.go.dev (RequestCtx concurrency note). [1]
- Alternate pkg.go.dev rendering with same warning. [2]
- Project FAQ / guidance (explicitly: call TimeoutError before returning if other goroutines access RequestCtx) and related issue discussions about timeouts under high concurrency. [3]
🌐 Web query:
Go fasthttp context modification timeout handler race condition
💡 Result:
Short answer: fasthttp requires you NOT to let other goroutines access RequestCtx (or its members) after the request handler returns — otherwise a race/panic can occur when a timeout handler marks the ctx timed-out while another goroutine is still touching it. Either eliminate cross-goroutine references to ctx or explicitly call ctx.TimeoutError (or use TimeoutHandler) before returning so the library can mark the ctx and ignore further modifications. See the fasthttp docs and README for details and examples. [1][2]
Why this happens (brief):
- RequestCtx and many of its members are only valid while the handler is running; fasthttp re-uses/returns buffers after the handler returns, so concurrent access by a stray goroutine races with the server reusing memory. The docs warn that TimeoutError MUST be called before returning if other goroutines still hold ctx references. [1][2]
Mitigations (concise):
- Do not capture *fasthttp.RequestCtx or its internal byte-slices in goroutines that outlive the handler. Copy values you need (strings/bytes) before spawning goroutines. [1]
- Use fasthttp.TimeoutHandler to automatically handle deadlines, or call ctx.TimeoutError / TimeoutErrorWithCode / TimeoutErrorWithResponse before returning when you know background goroutines may still touch ctx. The TimeoutError call marks the ctx and causes further modifications to be ignored. [1]
- Prefer eliminating ctx references from background work (use channels, context.Context you create, or copy request data). Use sync primitives (WaitGroup/cancel) to coordinate. [1][2]
References:
- fasthttp API docs (RequestCtx.TimeoutError, notes about validity until handler returns). [1]
- fasthttp README / migration notes about data races and using TimeoutError / TimeoutHandler. [2]
Sources:
[1] fasthttp package docs — RequestCtx.TimeoutError and usage notes.
[2] fasthttp README / migration guidance on races and TimeoutHandler.
Confirmed: Real data race between OnTimeout callback and handler goroutine
The review comment correctly identifies a data race. fasthttp's RequestCtx is not safe for concurrent access — the only supported exception is calling RequestCtx.TimeoutError while other goroutines may still access the RequestCtx.
In the code at lines 44–48, when the timeout expires:
- Line 29 spawned a goroutine executing
h(ctx)(the handler) - Line 46 calls
OnTimeout(ctx)from the main goroutine while the handler may still be running OnTimeoutis afiber.Handlerthat can modifyctx- Line 47 then calls
TimeoutErrorWithResponse(the safe operation)
The problem is that OnTimeout(ctx) runs before the safe TimeoutErrorWithResponse call, allowing a race between the handler's writes and OnTimeout's writes to the same RequestCtx.
Recommended fixes:
- Call
TimeoutErrorWithResponse(orTimeoutErrorWithCode) first to mark the context as timed out, preventing further modifications - Or document that
OnTimeoutcallbacks must not modifyctx(logs/metrics only) - Or pass a separate
Responseobject toOnTimeoutinstead of the sharedctx - Add a package-level comment warning about concurrent access constraints
🤖 Prompt for AI Agents
middleware/timeout/timeout.go around lines 45–51: the OnTimeout callback runs
before marking the fasthttp.RequestCtx as timed out, causing a real data race
with the handler; to fix, call ctx.RequestCtx().TimeoutErrorWithResponse(...)
(or TimeoutErrorWithCode) first to mark the context timed out, then invoke
cfg.OnTimeout (or better, invoke cfg.OnTimeout with a copy of the response or a
wrapper that exposes only safe read-only data); alternatively add package-level
docs that OnTimeout must not mutate ctx and only perform logging/metrics if you
prefer not to change call order.
There was a problem hiding this comment.
Actionable comments posted: 1
♻️ Duplicate comments (3)
middleware/timeout/timeout.go (3)
28-31: Critical: Unbuffered channel causes goroutine leak on timeout.When the timeout expires first, the handler goroutine will block indefinitely trying to send its result to a channel with no receiver. Use a buffered channel with capacity 1.
Apply this diff:
- err := make(chan error) + errCh := make(chan error, 1) go func() { - err <- h(ctx) + errCh <- h(ctx) }()
32-51: Major: Timer leak when handler completes before timeout.
time.Aftercreates a timer that isn't stopped when the handler finishes first, potentially leaking resources under high load. Usetime.NewTimerwithdefer timer.Stop().Apply this diff:
+ timer := time.NewTimer(timeout) + defer timer.Stop() + select { - case err := <-err: + case err := <-errCh: if err != nil && (len(cfg.Errors) > 0 && isCustomError(err, cfg.Errors)) { if cfg.OnTimeout != nil { if toErr := cfg.OnTimeout(ctx); toErr != nil { return toErr } } return fiber.ErrRequestTimeout } return err - case <-time.After(timeout): + case <-timer.C: if cfg.OnTimeout != nil { err := cfg.OnTimeout(ctx) ctx.RequestCtx().TimeoutErrorWithResponse(&ctx.RequestCtx().Response) return err } ctx.RequestCtx().TimeoutErrorWithCode(utils.StatusMessage(fiber.StatusRequestTimeout), fiber.StatusRequestTimeout) return fiber.ErrRequestTimeout }
44-47: Critical: Data race between OnTimeout and handler goroutine.
OnTimeout(ctx)is invoked while the handler goroutine may still be accessingctx. Per fasthttp documentation,RequestCtxis unsafe for concurrent access—onlyTimeoutError*methods may be called concurrently.Call
TimeoutErrorWithCodeorTimeoutErrorWithResponsebefore invokingOnTimeout, or document thatOnTimeoutmust not modifyctx(logging/metrics only).Example fix (calling TimeoutError first):
case <-timer.C: + ctx.RequestCtx().TimeoutErrorWithCode(utils.StatusMessage(fiber.StatusRequestTimeout), fiber.StatusRequestTimeout) if cfg.OnTimeout != nil { - err := cfg.OnTimeout(ctx) - ctx.RequestCtx().TimeoutErrorWithResponse(&ctx.RequestCtx().Response) - return err + // OnTimeout is now safe to call after ctx is frozen; modifications are ignored + return cfg.OnTimeout(ctx) } - ctx.RequestCtx().TimeoutErrorWithCode(utils.StatusMessage(fiber.StatusRequestTimeout), fiber.StatusRequestTimeout) return fiber.ErrRequestTimeout
🧹 Nitpick comments (1)
middleware/timeout/timeout_test.go (1)
24-37: Consider whether runHandler test helper is necessary.This helper duplicates the custom error handling logic from
timeout.go(lines 34-41). If that logic changes, this test code must be updated separately. Consider testing via the publicNewfunction instead to avoid maintaining parallel implementations.
📜 Review details
Configuration used: CodeRabbit UI
Review profile: CHILL
Plan: Pro
📒 Files selected for processing (2)
middleware/timeout/timeout.go(2 hunks)middleware/timeout/timeout_test.go(2 hunks)
🧰 Additional context used
📓 Path-based instructions (1)
**/*.go
📄 CodeRabbit inference engine (AGENTS.md)
**/*.go: Apply formatting using gofumpt (Make target: format)
Optimize struct field alignment using betteralign (Make target: betteralign)
Modernize code using gopls modernize (Make target: modernize)
Files:
middleware/timeout/timeout_test.gomiddleware/timeout/timeout.go
🧬 Code graph analysis (2)
middleware/timeout/timeout_test.go (3)
app.go (2)
Handler(40-40)Config(113-418)middleware/timeout/config.go (1)
Config(10-26)constants.go (1)
ErrRequestTimeout(126-126)
middleware/timeout/timeout.go (1)
constants.go (2)
ErrRequestTimeout(126-126)StatusRequestTimeout(81-81)
🪛 GitHub Actions: golangci-lint
middleware/timeout/timeout_test.go
[error] 173-173: golangci-lint: unused-parameter: parameter 'c' seems to be unused, consider removing or renaming it as _ (revive)
⏰ Context from checks skipped due to timeout of 90000ms. You can increase the timeout in your CodeRabbit configuration to a maximum of 15 minutes (900000ms). (2)
- GitHub Check: Compare
- GitHub Check: repeated
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@pjebs There's a race condition happening in the implementation. |
|
@gaby I'm not sure if it can be fixed without knowing fasthttp better. |
|
When the timeout occurs the handler should not have influence over the response or anything for that matter. |
| if cfg.OnTimeout != nil { | ||
| return cfg.OnTimeout(ctx) | ||
| err := cfg.OnTimeout(ctx) | ||
| ctx.RequestCtx().TimeoutErrorWithResponse(&ctx.RequestCtx().Response) |
There was a problem hiding this comment.
This is a problem, you have to create a brand new response object not the one from the ctx since it gets recycle.
There was a problem hiding this comment.
The function TimeoutErrorWithResponse already creates a new response inside
There was a problem hiding this comment.
| cancel() | ||
| ctx.SetContext(parent) | ||
| err := make(chan error, 1) | ||
| go func() { |
There was a problem hiding this comment.
If the timeout occurs first, the go routine will otherwise block forever because there is nothing to receive from the channel. Hence the buffered channel.
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@pjebs one problem is the response, you have to create a new object. Look at the fasthttp test case for doing this for example https://github.com/valyala/fasthttp/blob/master/server_test.go#L3148 |
|
The middleware should work like this:
The handler returning errors influencing the final response part is creating race conditions. |
3 participants
Description
Fixed timeout middleware
Needs to be checked
Fixes #3394
Changes introduced
List the new features or adjustments introduced in this pull request. Provide details on benchmarks, documentation updates, changelog entries, and if applicable, the migration guide.
Type of change
Please delete options that are not relevant.
Checklist
Before you submit your pull request, please make sure you meet these requirements:
/docs/directory for Fiber's documentation.Commit formatting
Please use emojis in commit messages for an easy way to identify the purpose or intention of a commit. Check out the emoji cheatsheet here: CONTRIBUTING.md