sing-box/debug_http.go

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package box
import (
"net/http"
"net/http/pprof"
"runtime"
"runtime/debug"
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"strings"
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"github.com/sagernet/sing-box/common/humanize"
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"github.com/sagernet/sing-box/log"
"github.com/sagernet/sing-box/option"
E "github.com/sagernet/sing/common/exceptions"
"github.com/sagernet/sing/common/json"
"github.com/sagernet/sing/common/json/badjson"
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"github.com/go-chi/chi/v5"
)
var debugHTTPServer *http.Server
func applyDebugListenOption(options option.DebugOptions) {
if debugHTTPServer != nil {
debugHTTPServer.Close()
debugHTTPServer = nil
}
if options.Listen == "" {
return
}
r := chi.NewMux()
r.Route("/debug", func(r chi.Router) {
r.Get("/gc", func(writer http.ResponseWriter, request *http.Request) {
writer.WriteHeader(http.StatusNoContent)
go debug.FreeOSMemory()
})
r.Get("/memory", func(writer http.ResponseWriter, request *http.Request) {
var memStats runtime.MemStats
runtime.ReadMemStats(&memStats)
var memObject badjson.JSONObject
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memObject.Put("heap", humanize.MemoryBytes(memStats.HeapInuse))
memObject.Put("stack", humanize.MemoryBytes(memStats.StackInuse))
memObject.Put("idle", humanize.MemoryBytes(memStats.HeapIdle-memStats.HeapReleased))
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memObject.Put("goroutines", runtime.NumGoroutine())
memObject.Put("rss", rusageMaxRSS())
encoder := json.NewEncoder(writer)
encoder.SetIndent("", " ")
encoder.Encode(memObject)
})
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r.Route("/pprof", func(r chi.Router) {
r.HandleFunc("/", func(writer http.ResponseWriter, request *http.Request) {
if !strings.HasSuffix(request.URL.Path, "/") {
http.Redirect(writer, request, request.URL.Path+"/", http.StatusMovedPermanently)
} else {
pprof.Index(writer, request)
}
})
r.HandleFunc("/*", pprof.Index)
r.HandleFunc("/cmdline", pprof.Cmdline)
r.HandleFunc("/profile", pprof.Profile)
r.HandleFunc("/symbol", pprof.Symbol)
r.HandleFunc("/trace", pprof.Trace)
})
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})
debugHTTPServer = &http.Server{
Addr: options.Listen,
Handler: r,
}
go func() {
err := debugHTTPServer.ListenAndServe()
if err != nil && !E.IsClosed(err) {
log.Error(E.Cause(err, "serve debug HTTP server"))
}
}()
}