b26ef7439e
Initial implementation of lightmux-contrib, a sibling module to lightmux that hosts opinionated middlewares with one sub-package per middleware: - realip: resolves the originating client IP from CF-Connecting-IP, True-Client-IP, X-Real-IP, or X-Forwarded-For. Optional peer-CIDR allowlist via netip.Prefix. - requestlog: emits a structured http.request record (method, path, status, duration, client) per request via splinter. - recoverer: catches panics, wraps with errx under op "recoverer", logs with stack, and writes a 500 response. Each package exposes a single New(...) constructor returning func(http.Handler) http.Handler. The contrib module intentionally does not import lightmux — middlewares interoperate via the standard stdlib middleware shape. Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
36 lines
829 B
Go
36 lines
829 B
Go
// Package recoverer catches panics inside HTTP handlers, logs them with stack
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// trace, and writes a 500 response.
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package recoverer
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import (
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"log"
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"net/http"
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"runtime/debug"
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"git.juancwu.dev/juancwu/errx"
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)
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const op = "recoverer"
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// New returns a panic-recovery middleware.
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func New() func(http.Handler) http.Handler {
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return func(next http.Handler) http.Handler {
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return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
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defer func() {
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rec := recover()
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if rec == nil {
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return
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}
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var err error
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if e, ok := rec.(error); ok {
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err = errx.Wrap(op, e)
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} else {
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err = errx.Newf(op, "panic: %v", rec)
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}
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log.Printf("%v\n%s", err, debug.Stack())
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http.Error(w, "Internal Server Error", http.StatusInternalServerError)
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}()
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next.ServeHTTP(w, r)
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})
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}
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}
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