diff --git a/.gitignore b/.gitignore new file mode 100644 index 0000000..06f5147 --- /dev/null +++ b/.gitignore @@ -0,0 +1,21 @@ +*.out +tmp +tmp/* + +*.exe +*.exe~ +*.dll +*.so +*.dylib + +# Test binary, built with `go test -c` +*.test + +# Output of the go coverage tool, specifically when used with LiteIDE +*.out + +# Dependency directories (remove the comment below to include it) +# vendor/ + +# Go workspace file +go.work diff --git a/Dockerfile b/Dockerfile index 41136a1..2be531b 100644 --- a/Dockerfile +++ b/Dockerfile @@ -1,18 +1,18 @@ # Extract graphviz and dependencies -FROM golang:1.17.3-bullseye AS deb_extractor +FROM golang:1.19.1-bullseye AS deb_extractor RUN cd /tmp && \ apt-get update && apt-get download \ graphviz libgvc6 libcgraph6 libltdl7 libxdot4 libcdt5 libpathplan4 libexpat1 zlib1g && \ mkdir /dpkg && \ for deb in *.deb; do dpkg --extract $deb /dpkg || exit 10; done -FROM golang:1.17.3-bullseye AS builder -COPY go.mod go.sum pprofweb.go /go/src/pprofweb/ +FROM golang:1.19.1-bullseye AS builder +COPY . /go/src/pprofweb/ WORKDIR /go/src/pprofweb -RUN go build --mod=readonly pprofweb.go +RUN go build -o server . FROM gcr.io/distroless/base-debian11:latest AS run -COPY --from=builder /go/src/pprofweb/pprofweb /pprofweb +COPY --from=builder /go/src/pprofweb/server /pprofweb COPY --from=deb_extractor /dpkg / # Configure dot plugins RUN ["dot", "-c"] @@ -20,5 +20,5 @@ RUN ["dot", "-c"] # Use a non-root user: slightly more secure (defense in depth) USER nobody WORKDIR / -EXPOSE 8080 +EXPOSE 7443 ENTRYPOINT ["/pprofweb"] diff --git a/LICENSE b/LICENSE deleted file mode 100644 index 970ac6e..0000000 --- a/LICENSE +++ /dev/null @@ -1,21 +0,0 @@ -MIT License - -Copyright (c) 2020 Evan Jones - -Permission is hereby granted, free of charge, to any person obtaining a copy -of this software and associated documentation files (the "Software"), to deal -in the Software without restriction, including without limitation the rights -to use, copy, modify, merge, publish, distribute, sublicense, and/or sell -copies of the Software, and to permit persons to whom the Software is -furnished to do so, subject to the following conditions: - -The above copyright notice and this permission notice shall be included in all -copies or substantial portions of the Software. - -THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR -IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, -FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE -AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER -LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, -OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE -SOFTWARE. diff --git a/cloudbuild.yaml b/cloudbuild.yaml deleted file mode 100644 index 55d726b..0000000 --- a/cloudbuild.yaml +++ /dev/null @@ -1,7 +0,0 @@ -# build with: -# gcloud builds submit . --substitutions=SHORT_SHA=$(git rev-parse --short=10 HEAD) -steps: -- name: 'gcr.io/cloud-builders/docker' - args: ['build', '--tag=us.gcr.io/$PROJECT_ID/pprofweb:$SHORT_SHA', '.'] -images: -- 'us.gcr.io/$PROJECT_ID/pprofweb:$SHORT_SHA' diff --git a/flagset/flags.go b/flagset/flags.go new file mode 100644 index 0000000..e453724 --- /dev/null +++ b/flagset/flags.go @@ -0,0 +1,80 @@ +package flagset + +import ( + "flag" + "strings" +) + +// Mostly copied from https://github.com/google/pprof/blob/master/internal/driver/flags.go +type Set struct { + Argz []string + s flag.FlagSet + usage []string +} + +// Bool implements the plugin.FlagSet interface. +func (p *Set) Bool(o string, d bool, c string) *bool { + return p.s.Bool(o, d, c) +} + +// Int implements the plugin.FlagSet interface. +func (p *Set) Int(o string, d int, c string) *int { + return p.s.Int(o, d, c) +} + +// Float64 implements the plugin.FlagSet interface. +func (p *Set) Float64(o string, d float64, c string) *float64 { + return p.s.Float64(o, d, c) +} + +// String implements the plugin.FlagSet interface. +func (p *Set) String(o, d, c string) *string { + return p.s.String(o, d, c) +} + +// BoolVar implements the plugin.FlagSet interface. +func (p *Set) BoolVar(b *bool, o string, d bool, c string) { + p.s.BoolVar(b, o, d, c) +} + +// IntVar implements the plugin.FlagSet interface. +func (p *Set) IntVar(i *int, o string, d int, c string) { + p.s.IntVar(i, o, d, c) +} + +// Float64Var implements the plugin.FlagSet interface. +// the value of the flag. +func (p *Set) Float64Var(f *float64, o string, d float64, c string) { + p.s.Float64Var(f, o, d, c) +} + +// StringVar implements the plugin.FlagSet interface. +func (p *Set) StringVar(s *string, o, d, c string) { + p.s.StringVar(s, o, d, c) +} + +// StringList implements the plugin.FlagSet interface. +func (p *Set) StringList(o, d, c string) *[]*string { + return &[]*string{p.s.String(o, d, c)} +} + +// AddExtraUsage implements the plugin.FlagSet interface. +func (p *Set) AddExtraUsage(eu string) { + p.usage = append(p.usage, eu) +} + +// ExtraUsage implements the plugin.FlagSet interface. +func (p *Set) ExtraUsage() string { + return strings.Join(p.usage, "\n") +} + +// Parse implements the plugin.FlagSet interface. +func (p *Set) Parse(usage func()) []string { + p.s.Usage = usage + p.s.Parse(p.Argz) + Argz := p.s.Args() + if len(Argz) == 0 { + usage() + } + return Argz +} diff --git a/go.mod b/go.mod index b778b25..52668ca 100644 --- a/go.mod +++ b/go.mod @@ -1,10 +1,16 @@ -module github.com/evanj/pprofweb +module a.tuxpa.in/a/pprofweb -go 1.17 +go 1.19 require ( - github.com/NYTimes/gziphandler v1.1.1 + gfx.cafe/util/go/generic v0.0.0-20220921131905-10a2bde53f66 + github.com/go-chi/chi/v5 v5.0.7 github.com/google/pprof v0.0.0-20211108044417-e9b028704de0 + github.com/rs/xid v1.4.0 + github.com/spf13/afero v1.9.2 ) -require github.com/ianlancetaylor/demangle v0.0.0-20210905161508-09a460cdf81d // indirect +require ( + github.com/ianlancetaylor/demangle v0.0.0-20210905161508-09a460cdf81d // indirect + golang.org/x/text v0.3.4 // indirect +) diff --git a/go.sum b/go.sum index 1c3cc24..e072cad 100644 --- a/go.sum +++ b/go.sum @@ -1,17 +1,444 @@ -github.com/NYTimes/gziphandler v1.1.1 h1:ZUDjpQae29j0ryrS0u/B8HZfJBtBQHjqw2rQ2cqUQ3I= -github.com/NYTimes/gziphandler v1.1.1/go.mod h1:n/CVRwUEOgIxrgPvAQhUUr9oeUtvrhMomdKFjzJNB0c= +cloud.google.com/go v0.26.0/go.mod h1:aQUYkXzVsufM+DwF1aE+0xfcU+56JwCaLick0ClmMTw= +cloud.google.com/go v0.34.0/go.mod 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v1.27.0/go.mod h1:qbnxyOmOxrQa7FizSgH+ReBfzJrCY1pSN7KXBS8abTk= +google.golang.org/grpc v1.27.1/go.mod h1:qbnxyOmOxrQa7FizSgH+ReBfzJrCY1pSN7KXBS8abTk= +google.golang.org/grpc v1.28.0/go.mod h1:rpkK4SK4GF4Ach/+MFLZUBavHOvF2JJB5uozKKal+60= +google.golang.org/grpc v1.29.1/go.mod h1:itym6AZVZYACWQqET3MqgPpjcuV5QH3BxFS3IjizoKk= +google.golang.org/grpc v1.30.0/go.mod h1:N36X2cJ7JwdamYAgDz+s+rVMFjt3numwzf/HckM8pak= +google.golang.org/grpc v1.31.0/go.mod h1:N36X2cJ7JwdamYAgDz+s+rVMFjt3numwzf/HckM8pak= +google.golang.org/grpc v1.31.1/go.mod h1:N36X2cJ7JwdamYAgDz+s+rVMFjt3numwzf/HckM8pak= +google.golang.org/grpc v1.33.2/go.mod h1:JMHMWHQWaTccqQQlmk3MJZS+GWXOdAesneDmEnv2fbc= +google.golang.org/grpc v1.34.0/go.mod h1:WotjhfgOW/POjDeRt8vscBtXq+2VjORFy659qA51WJ8= +google.golang.org/grpc v1.35.0/go.mod h1:qjiiYl8FncCW8feJPdyg3v6XW24KsRHe+dy9BAGRRjU= +google.golang.org/protobuf v0.0.0-20200109180630-ec00e32a8dfd/go.mod h1:DFci5gLYBciE7Vtevhsrf46CRTquxDuWsQurQQe4oz8= +google.golang.org/protobuf 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h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0= +gopkg.in/check.v1 v1.0.0-20180628173108-788fd7840127/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0= +gopkg.in/errgo.v2 v2.1.0/go.mod h1:hNsd1EY+bozCKY1Ytp96fpM3vjJbqLJn88ws8XvfDNI= +gopkg.in/yaml.v2 v2.2.2/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI= +gopkg.in/yaml.v3 v3.0.0-20200313102051-9f266ea9e77c/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM= +honnef.co/go/tools v0.0.0-20190102054323-c2f93a96b099/go.mod h1:rf3lG4BRIbNafJWhAfAdb/ePZxsR/4RtNHQocxwk9r4= +honnef.co/go/tools v0.0.0-20190106161140-3f1c8253044a/go.mod h1:rf3lG4BRIbNafJWhAfAdb/ePZxsR/4RtNHQocxwk9r4= +honnef.co/go/tools v0.0.0-20190418001031-e561f6794a2a/go.mod h1:rf3lG4BRIbNafJWhAfAdb/ePZxsR/4RtNHQocxwk9r4= +honnef.co/go/tools v0.0.0-20190523083050-ea95bdfd59fc/go.mod h1:rf3lG4BRIbNafJWhAfAdb/ePZxsR/4RtNHQocxwk9r4= +honnef.co/go/tools v0.0.1-2019.2.3/go.mod h1:a3bituU0lyd329TUQxRnasdCoJDkEUEAqEt0JzvZhAg= +honnef.co/go/tools v0.0.1-2020.1.3/go.mod h1:X/FiERA/W4tHapMX5mGpAtMSVEeEUOyHaw9vFzvIQ3k= +honnef.co/go/tools v0.0.1-2020.1.4/go.mod h1:X/FiERA/W4tHapMX5mGpAtMSVEeEUOyHaw9vFzvIQ3k= +rsc.io/binaryregexp v0.2.0/go.mod h1:qTv7/COck+e2FymRvadv62gMdZztPaShugOCi3I+8D8= +rsc.io/quote/v3 v3.1.0/go.mod h1:yEA65RcK8LyAZtP9Kv3t0HmxON59tX3rD+tICJqUlj0= +rsc.io/sampler v1.3.0/go.mod h1:T1hPZKmBbMNahiBKFy5HrXp6adAjACjK9JXDnKaTXpA= diff --git a/pprofweb-deploy.yaml b/pprofweb-deploy.yaml deleted file mode 100644 index 39a0884..0000000 --- a/pprofweb-deploy.yaml +++ /dev/null @@ -1,60 +0,0 @@ -apiVersion: apps/v1 -kind: Deployment -metadata: - name: pprofweb - labels: - app: pprofweb -spec: - replicas: 1 - selector: - matchLabels: - app: pprofweb - template: - metadata: - labels: - app: pprofweb - annotations: - # allow scale down even though this uses an emptyDir for tmp - cluster-autoscaler.kubernetes.io/safe-to-evict: "true" - spec: - containers: - - name: pprofweb - image: us.gcr.io/gosignin-demo/pprofweb:20200120-1 - - resources: - requests: - memory: 64Mi - #ephemeral-storage: 256Mi - limits: - memory: 128Mi - #ephemeral-storage: 256Mi - - volumeMounts: - - mountPath: /tmp - name: tmp - - # defense in depth: read-only FS; run as nobody/nogroup - securityContext: - readOnlyRootFilesystem: true - runAsNonRoot: true - runAsUser: 65534 - runAsGroup: 65534 - - volumes: - - name: tmp - emptyDir: - # TODO: replace with resource request/limit? - sizeLimit: 256Mi ---- -apiVersion: v1 -kind: Service -metadata: - name: pprofweb -spec: - selector: - app: pprofweb - ports: - - name: http - protocol: TCP - port: 8080 - targetPort: 8080 diff --git a/pprofweb.go b/pprofweb.go index 6368419..d22163d 100644 --- a/pprofweb.go +++ b/pprofweb.go @@ -1,253 +1,41 @@ package main import ( - "flag" - "io" "log" "net/http" - "net/http/pprof" "os" - "path" - "path/filepath" - "strings" - "github.com/NYTimes/gziphandler" - "github.com/google/pprof/driver" + "a.tuxpa.in/a/pprofweb/pprofweb" + "github.com/go-chi/chi/v5" + "github.com/go-chi/chi/v5/middleware" + "github.com/spf13/afero" ) -const portEnvVar = "PORT" -const defaultPort = "8080" -const maxUploadSize = 32 << 20 // 32 MiB - -const fileFormID = "file" -const uploadPath = "/upload" -const pprofWebPath = "/pprofweb/" - -// use the system-specified temporary directory -// TODO: do something smarter with a real temporary directory -var pprofFilePath = filepath.Join(os.TempDir(), "pprofweb-temp") - -type server struct { - // serves pprof handlers after it is loaded - pprofMux http.Handler -} - -func (s *server) startHTTP(args *driver.HTTPServerArgs) error { - mux := http.NewServeMux() - for pattern, handler := range args.Handlers { - var joinedPattern string - if pattern == "/" { - joinedPattern = pprofWebPath - } else { - joinedPattern = path.Join(pprofWebPath, pattern) - } - mux.Handle(joinedPattern, handler) - } - - // enable gzip compression: flamegraphs can be big! - s.pprofMux = gziphandler.GzipHandler(mux) - - return nil -} - -func (s *server) servePprof(w http.ResponseWriter, r *http.Request) { - if s.pprofMux == nil { - http.Error(w, "must upload profile first", http.StatusInternalServerError) - return - } - s.pprofMux.ServeHTTP(w, r) -} - -func rootHandler(w http.ResponseWriter, r *http.Request) { - log.Printf("rootHandler %s %s", r.Method, r.URL.String()) - if r.Method != http.MethodGet { - http.Error(w, "wrong method", http.StatusMethodNotAllowed) - return - } - if r.URL.Path != "/" { - http.Error(w, "not found", http.StatusNotFound) - return - } - - w.Write([]byte(rootTemplate)) -} - -func (s *server) uploadHandlerErrHandler(w http.ResponseWriter, r *http.Request) { - log.Printf("uploadHandler %s %s", r.Method, r.URL.String()) - if r.Method != http.MethodPost { - http.Error(w, "wrong method", http.StatusMethodNotAllowed) - return - } - err := s.uploadHandler(w, r) - if err != nil { - log.Printf("upload error: %s", err.Error()) - http.Error(w, err.Error(), http.StatusInternalServerError) - return - } -} - -func (s *server) uploadHandler(w http.ResponseWriter, r *http.Request) error { - if err := r.ParseMultipartForm(maxUploadSize); err != nil { - return err - } - uploadedFile, _, err := r.FormFile(fileFormID) - if err != nil { - return err - } - defer uploadedFile.Close() - - // write the file out to a temporary location - f, err := os.OpenFile(pprofFilePath, os.O_CREATE|os.O_TRUNC|os.O_WRONLY, 0600) - if err != nil { - return err - } - defer f.Close() - if _, err := io.Copy(f, uploadedFile); err != nil { - return err - } - if err := f.Close(); err != nil { - return err - } - if err := uploadedFile.Close(); err != nil { - return err - } - - // start the pprof web handler: pass -http and -no_browser so it starts the - // handler but does not try to launch a browser - // our startHTTP will do the appropriate interception - flags := &pprofFlags{ - args: []string{"-http=localhost:0", "-no_browser", pprofFilePath}, - } - options := &driver.Options{ - Flagset: flags, - HTTPServer: s.startHTTP, - } - if err := driver.PProf(options); err != nil { - return err - } - - http.Redirect(w, r, pprofWebPath, http.StatusSeeOther) - return nil -} - -// handler returns a handler that servers the pprof web UI. -func (s *server) handler() *http.ServeMux { - mux := http.NewServeMux() - mux.HandleFunc("/", rootHandler) - mux.HandleFunc(uploadPath, s.uploadHandlerErrHandler) - mux.HandleFunc(pprofWebPath, s.servePprof) - - // copied from net/http/pprof to avoid relying on the global http.DefaultServeMux - mux.HandleFunc("/debug/pprof/", pprof.Index) - mux.HandleFunc("/debug/pprof/cmdline", pprof.Cmdline) - mux.HandleFunc("/debug/pprof/profile", pprof.Profile) - mux.HandleFunc("/debug/pprof/symbol", pprof.Symbol) - mux.HandleFunc("/debug/pprof/trace", pprof.Trace) - return mux -} - func main() { - s := &server{} - handler := s.handler() - port := os.Getenv(portEnvVar) + filepath := os.Getenv("STORAGE_PATH") + if filepath == "" { + filepath = "./tmp" + } + + s := pprofweb.NewServer( + afero.NewBasePathFs(afero.NewOsFs(), filepath), + pprofweb.Config{}, + ) + + port := os.Getenv("PORT") if port == "" { - port = defaultPort - log.Printf("warning: %s not specified; using default %s", portEnvVar, port) + port = "7443" + log.Printf("warning: %s not specified; using default %s", "PORT", port) } addr := ":" + port log.Printf("listen addr %s (http://localhost:%s/)", addr, port) - if err := http.ListenAndServe(addr, handler); err != nil { + r := chi.NewRouter() + r.Use(middleware.Recoverer, middleware.Logger) + r.Use(middleware.NewCompressor(6).Handler) + r.Route("/", s.HandleHTTP()) + if err := http.ListenAndServe(addr, r); err != nil { panic(err) } } - -const rootTemplate = ` - -PProf Web Interface - -

PProf Web Interface

-

Upload a file to explore it using the Pprof web interface. See the documentation/source code.

-

This is currently a hack: it runs in Google Cloud Run, which will restart instances whenever it wants. This means your state may get lost at any time, and it won't work if there are multiple people using it at the same time.

- -
-

Upload file:

-
- - -` - -// Mostly copied from https://github.com/google/pprof/blob/master/internal/driver/flags.go -type pprofFlags struct { - args []string - s flag.FlagSet - usage []string -} - -// Bool implements the plugin.FlagSet interface. -func (p *pprofFlags) Bool(o string, d bool, c string) *bool { - return p.s.Bool(o, d, c) -} - -// Int implements the plugin.FlagSet interface. -func (p *pprofFlags) Int(o string, d int, c string) *int { - return p.s.Int(o, d, c) -} - -// Float64 implements the plugin.FlagSet interface. -func (p *pprofFlags) Float64(o string, d float64, c string) *float64 { - return p.s.Float64(o, d, c) -} - -// String implements the plugin.FlagSet interface. -func (p *pprofFlags) String(o, d, c string) *string { - return p.s.String(o, d, c) -} - -// BoolVar implements the plugin.FlagSet interface. -func (p *pprofFlags) BoolVar(b *bool, o string, d bool, c string) { - p.s.BoolVar(b, o, d, c) -} - -// IntVar implements the plugin.FlagSet interface. -func (p *pprofFlags) IntVar(i *int, o string, d int, c string) { - p.s.IntVar(i, o, d, c) -} - -// Float64Var implements the plugin.FlagSet interface. -// the value of the flag. -func (p *pprofFlags) Float64Var(f *float64, o string, d float64, c string) { - p.s.Float64Var(f, o, d, c) -} - -// StringVar implements the plugin.FlagSet interface. -func (p *pprofFlags) StringVar(s *string, o, d, c string) { - p.s.StringVar(s, o, d, c) -} - -// StringList implements the plugin.FlagSet interface. -func (p *pprofFlags) StringList(o, d, c string) *[]*string { - return &[]*string{p.s.String(o, d, c)} -} - -// AddExtraUsage implements the plugin.FlagSet interface. -func (p *pprofFlags) AddExtraUsage(eu string) { - p.usage = append(p.usage, eu) -} - -// ExtraUsage implements the plugin.FlagSet interface. -func (p *pprofFlags) ExtraUsage() string { - return strings.Join(p.usage, "\n") -} - -// Parse implements the plugin.FlagSet interface. -func (p *pprofFlags) Parse(usage func()) []string { - p.s.Usage = usage - p.s.Parse(p.args) - args := p.s.Args() - if len(args) == 0 { - usage() - } - return args -} diff --git a/pprofweb/page.go b/pprofweb/page.go new file mode 100644 index 0000000..6437f67 --- /dev/null +++ b/pprofweb/page.go @@ -0,0 +1,53 @@ +package pprofweb + +import ( + "log" + "net/http" +) + +const rootTemplate = ` + +PProf Web Interface + +

Upload a file to explore it using the Pprof web interface. + +the source code over here . + + +code is based off this project. + +

+

+when you upload data, you get a unique url. you can share that url with other people! + +i currently have it set to save forever, but that might not always be true. assume that things can be lost at any time! + +also assume that things are not private. i am using xid to generate, which i believe is not secure? also its being stored on my computer lol. + + +anyhow, just update your profile here! + +go tool pprof [binary] profile.pb.gz + +

+ +
+

Upload file:

+
+ + +` + +func rootHandler(w http.ResponseWriter, r *http.Request) { + log.Printf("rootHandler %s %s", r.Method, r.URL.String()) + if r.Method != http.MethodGet { + http.Error(w, "wrong method", http.StatusMethodNotAllowed) + return + } + if r.URL.Path != "/" { + http.Error(w, "not found", http.StatusNotFound) + return + } + + w.Write([]byte(rootTemplate)) +} diff --git a/pprofweb/pprofweb.go b/pprofweb/pprofweb.go new file mode 100644 index 0000000..12c2a4f --- /dev/null +++ b/pprofweb/pprofweb.go @@ -0,0 +1,225 @@ +package pprofweb + +import ( + "errors" + "flag" + "fmt" + "io" + "log" + "net/http" + "os" + "path" + "sync" + "time" + + "a.tuxpa.in/a/pprofweb/flagset" + "gfx.cafe/util/go/generic" + "github.com/go-chi/chi/v5" + "github.com/google/pprof/driver" + "github.com/rs/xid" + "github.com/spf13/afero" +) + +type Config struct { + Expire time.Duration + MaxUploadSize int +} + +type Server struct { + fs afero.Fs + + instances generic.Map[xid.ID, *Instance] + + Config +} + +func NewServer(fs afero.Fs, c Config) *Server { + srv := afero.NewCacheOnReadFs(fs, afero.NewMemMapFs(), 24*time.Hour) + s := &Server{ + fs: srv, + Config: c, + } + + if s.MaxUploadSize == 0 { + s.MaxUploadSize = 32 << 20 + } + + return s +} + +// handler returns a handler that servers the pprof web UI. +func (s *Server) HandleHTTP() func(chi.Router) { + return func(r chi.Router) { + r.HandleFunc("/", rootHandler) + r.HandleFunc("/upload", s.HandleUpload) + r.HandleFunc("/{xid}", s.ServeInstance) + r.HandleFunc("/{xid}/*", s.ServeInstance) + + } +} + +func (s *Server) ServeInstance(w http.ResponseWriter, r *http.Request) { + err := s.serveInstance(w, r) + if err != nil { + http.Error(w, "instance not found: "+err.Error(), http.StatusNotFound) + return + } +} + +func (s *Server) serveInstance(w http.ResponseWriter, r *http.Request) error { + log.Printf("serveInstance %s %s", r.Method, r.URL.String()) + sid := chi.URLParam(r, "xid") + if sid == "" { + return errors.New("no id sent") + } + id, err := xid.FromString(sid) + if err != nil { + return errors.New("invalid id") + } + inst, err := s.GetInstance(id) + if err != nil { + return errors.New("instance not found: " + err.Error()) + } + inst.ServeHTTP(w, r) + return nil +} + +func (s *Server) NewInstance(xs []byte) (*Instance, error) { + // save instance + id := xid.New() + i := &Instance{ + id: id, + dat: xs, + } + + file, err := s.fs.Create(id.String()) + if err != nil { + return nil, err + } + _, err = file.Write(xs) + if err != nil { + file.Close() + return nil, err + } + err = file.Close() + if err != nil { + return nil, err + } + err = i.startServer() + if err != nil { + return nil, err + } + s.instances.Store(id, i) + return i, nil +} + +func (s *Server) GetInstance(id xid.ID) (*Instance, error) { + if i, ok := s.instances.Load(id); ok { + return i, nil + } + if s.Expire > 0 { + if id.Time().After(time.Now().Add(s.Expire)) { + s.fs.Remove(id.String()) + return nil, fmt.Errorf("profile expired") + } + } + bts, err := afero.ReadFile(s.fs, id.String()) + if err != nil { + return nil, err + } + i := &Instance{id: id, dat: bts} + err = i.startServer() + if err != nil { + return nil, err + } + s.instances.Store(id, i) + return i, nil +} + +func (s *Server) HandleUpload(w http.ResponseWriter, r *http.Request) { + log.Printf("uploadHandler %s %s", r.Method, r.URL.String()) + if r.Method != http.MethodPost { + http.Error(w, "wrong method", http.StatusMethodNotAllowed) + return + } + err := s.handleUpload(w, r) + if err != nil { + log.Printf("upload error: %s", err.Error()) + http.Error(w, err.Error(), http.StatusInternalServerError) + return + } +} + +func (s *Server) handleUpload(w http.ResponseWriter, r *http.Request) error { + if err := r.ParseMultipartForm(int64(s.MaxUploadSize)); err != nil { + return err + } + uploadedFile, _, err := r.FormFile("file") + if err != nil { + return err + } + defer uploadedFile.Close() + bts, err := io.ReadAll(uploadedFile) + if err != nil { + return err + } + + instance, err := s.NewInstance(bts) + if err != nil { + return err + } + http.Redirect(w, r, instance.id.String()+"/", http.StatusSeeOther) + return nil +} + +type Instance struct { + id xid.ID + dat []byte + + setup sync.Once + handler http.Handler + + mu sync.RWMutex +} + +func (i *Instance) startServer() error { + file, err := os.CreateTemp("", i.id.String()) + if err != nil { + return err + } + file.Write(i.dat) + flags := &flagset.Set{ + Argz: []string{"-http=localhost:0", "-no_browser", file.Name()}, + } + options := &driver.Options{ + Flagset: flags, + HTTPServer: i.startHTTP, + } + if err := driver.PProf(options); err != nil { + return err + } + return nil +} +func (i *Instance) startHTTP(args *driver.HTTPServerArgs) error { + r := chi.NewRouter() + for pattern, handler := range args.Handlers { + jpat := "/" + path.Join(i.id.String(), pattern) + log.Println(jpat) + r.Handle(jpat, handler) + r.Handle(jpat+"/", handler) + } + i.handler = r + return nil +} + +func (i *Instance) ServeHTTP(w http.ResponseWriter, r *http.Request) { + log.Printf("serveInstanceHTTP %s %s", i.id, r.URL.String()) + i.handler.ServeHTTP(w, r) +} + +// Mostly copied from https://github.com/google/pprof/blob/master/internal/driver/flags.go +type pprofFlags struct { + args []string + s flag.FlagSet + usage []string +}