func HttpCache(ctx echo.Context, eTag interface{}, etagValidator func(oldEtag, newEtag string) bool) bool {
var etag string
if eTag == nil {
etag = fmt.Sprintf(`%v`, time.Now().UTC().Unix())
} else {
etag = fmt.Sprintf(`%v`, eTag)
}
resp := ctx.Response()
//resp.Header().Set(`Connection`, `keep-alive`)
resp.Header().Set(`X-Cache`, `HIT from Webx-Page-Cache`)
if inm := ctx.Request().Header().Get("If-None-Match"); inm != `` {
var valid bool
if etagValidator != nil {
valid = etagValidator(inm, etag)
} else {
valid = inm == etag
}
if valid {
resp.Header().Del(`Content-Type`)
resp.Header().Del(`Content-Length`)
resp.WriteHeader(http.StatusNotModified)
ctx.Object().Echo().Logger().Debugf(`%v is not modified.`, ctx.Path())
return true
}
}
resp.Header().Set(`Etag`, etag)
resp.Header().Set(`Cache-Control`, `public,max-age=1`)
return false
}
func sleep(e echo.Context, d time.Duration) {
w := e.Response()
var clientGone <-chan bool
if cn, ok := w.(http.CloseNotifier); ok {
clientGone = cn.CloseNotify()
}
select {
case <-time.After(d):
case <-clientGone:
}
}
// Index responds with the pprof-formatted profile named by the request.
// For example, "/debug/pprof/heap" serves the "heap" profile.
// Index responds to a request for "/debug/pprof/" with an HTML page
// listing the available profiles.
func Index(e echo.Context) {
r := e.Request()
w := e.Response()
if strings.HasPrefix(r.URL().Path(), "/debug/pprof/") {
name := strings.TrimPrefix(r.URL().Path(), "/debug/pprof/")
if name != "" {
handler(name).ServeHTTP(e)
return
}
}
profiles := pprof.Profiles()
if err := indexTmpl.Execute(w, profiles); err != nil {
log.Print(err)
}
}
// Symbol looks up the program counters listed in the request,
// responding with a table mapping program counters to function names.
// The package initialization registers it as /debug/pprof/symbol.
func Symbol(e echo.Context) {
w := e.Response()
r := e.Request()
w.Header().Set("Content-Type", "text/plain; charset=utf-8")
// We have to read the whole POST body before
// writing any output. Buffer the output here.
var buf bytes.Buffer
// We don't know how many symbols we have, but we
// do have symbol information. Pprof only cares whether
// this number is 0 (no symbols available) or > 0.
fmt.Fprintf(&buf, "num_symbols: 1\n")
var b *bufio.Reader
if r.Method() == "POST" {
b = bufio.NewReader(r.Body())
} else {
b = bufio.NewReader(strings.NewReader(r.URL().RawQuery()))
}
for {
word, err := b.ReadSlice('+')
if err == nil {
word = word[0 : len(word)-1] // trim +
}
pc, _ := strconv.ParseUint(string(word), 0, 64)
if pc != 0 {
f := runtime.FuncForPC(uintptr(pc))
if f != nil {
fmt.Fprintf(&buf, "%#x %s\n", pc, f.Name())
}
}
// Wait until here to check for err; the last
// symbol will have an err because it doesn't end in +.
if err != nil {
if err != io.EOF {
fmt.Fprintf(&buf, "reading request: %v\n", err)
}
break
}
}
w.Write(buf.Bytes())
}
func (name handler) ServeHTTP(e echo.Context) {
w := e.Response()
r := e.Request()
w.Header().Set("Content-Type", "text/plain; charset=utf-8")
debug, _ := strconv.Atoi(r.FormValue("debug"))
p := pprof.Lookup(string(name))
if p == nil {
w.WriteHeader(404)
fmt.Fprintf(w, "Unknown profile: %s\n", name)
return
}
gc, _ := strconv.Atoi(r.FormValue("gc"))
if name == "heap" && gc > 0 {
runtime.GC()
}
p.WriteTo(w, debug)
return
}
// Trace responds with the execution trace in binary form.
// Tracing lasts for duration specified in seconds GET parameter, or for 1 second if not specified.
// The package initialization registers it as /debug/pprof/trace.
func Trace(e echo.Context) {
w := e.Response()
r := e.Request()
sec, _ := strconv.ParseInt(r.FormValue("seconds"), 10, 64)
if sec == 0 {
sec = 1
}
// Set Content Type assuming trace.Start will work,
// because if it does it starts writing.
w.Header().Set("Content-Type", "application/octet-stream")
if err := trace.Start(w); err != nil {
// trace.Start failed, so no writes yet.
// Can change header back to text content and send error code.
w.Header().Set("Content-Type", "text/plain; charset=utf-8")
w.WriteHeader(http.StatusInternalServerError)
fmt.Fprintf(w, "Could not enable tracing: %s\n", err)
return
}
sleep(e, time.Duration(sec)*time.Second)
trace.Stop()
}
// Cmdline responds with the running program's
// command line, with arguments separated by NUL bytes.
// The package initialization registers it as /debug/pprof/cmdline.
func Cmdline(e echo.Context) {
w := e.Response()
w.Header().Set("Content-Type", "text/plain; charset=utf-8")
fmt.Fprintf(w, strings.Join(os.Args, "\x00"))
}
func (c *Cookie) Send(ctx echo.Context) {
ctx.Response().Header().Set("Set-Cookie", c.cookie.String())
}
