70 lines
1.3 KiB
Go
70 lines
1.3 KiB
Go
package profileinstance
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import (
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"flag"
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"log"
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"net/http"
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"os"
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"path"
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"sync"
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"github.com/go-chi/chi/v5"
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"github.com/google/pprof/driver"
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"github.com/rs/xid"
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"tuxpa.in/a/pprofweb/pkg/flagset"
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)
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type Instance struct {
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id xid.ID
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dat []byte
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handler http.Handler
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mu sync.RWMutex
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}
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func (i *Instance) Id() xid.ID {
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return i.id
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}
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func (i *Instance) startServer() error {
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file, err := os.CreateTemp("", i.id.String())
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if err != nil {
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return err
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}
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file.Write(i.dat)
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flags := &flagset.Set{
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Argz: []string{"-http=localhost.invalid:0", "-no_browser", file.Name()},
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}
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options := &driver.Options{
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Flagset: flags,
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HTTPServer: i.startHTTP,
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}
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if err := driver.PProf(options); err != nil {
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return err
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}
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return nil
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}
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func (i *Instance) startHTTP(args *driver.HTTPServerArgs) error {
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r := chi.NewRouter()
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for pattern, handler := range args.Handlers {
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jpat := path.Join(pattern)
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r.Handle(jpat, handler)
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r.Handle(jpat+"/", handler)
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}
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i.handler = r
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return nil
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}
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func (i *Instance) ServeHTTP(w http.ResponseWriter, r *http.Request) {
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log.Printf("serveInstanceHTTP %s %s", i.id, r.URL.String())
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i.handler.ServeHTTP(w, r)
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}
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// Mostly copied from https://github.com/google/pprof/blob/master/internal/driver/flags.go
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type pprofFlags struct {
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args []string
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s flag.FlagSet
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usage []string
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}
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