forked from vitessio/vitess
/
throttlerz.go
67 lines (55 loc) · 1.48 KB
/
throttlerz.go
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package throttler
import (
"fmt"
"html/template"
"net/http"
"strings"
)
const listHTML = `<!DOCTYPE html>
<title>{{len .Throttlers}} Active Throttler(s)</title>
<ul>
{{range .Throttlers}}
<li>
<a href="/throttlerz/{{.}}">{{.}}</a>
</li>
{{end}}
</ul>
`
const detailsHTML = `<!DOCTYPE html>
<title>Details for Throttler '{{.}}'</title>
<a href="/throttlerlogz/{{.}}">adapative throttling log</a>
TODO(mberlin): Add graphs here.
`
var (
listTemplate = template.Must(template.New("list").Parse(listHTML))
detailsTemplate = template.Must(template.New("details").Parse(detailsHTML))
)
func init() {
http.HandleFunc("/throttlerz/", func(w http.ResponseWriter, r *http.Request) {
throttlerzHandler(w, r, GlobalManager)
})
}
func throttlerzHandler(w http.ResponseWriter, r *http.Request, m *managerImpl) {
// Longest supported URL: /throttlerz/<name>
parts := strings.SplitN(r.URL.Path, "/", 3)
if len(parts) != 3 {
errMsg := fmt.Sprintf("invalid /throttlerz path: %q expected paths: /throttlerz or /throttlerz/<throttler name>", r.URL.Path)
http.Error(w, errMsg, http.StatusInternalServerError)
return
}
name := parts[2]
if name == "" {
listThrottlers(w, m)
return
}
showThrottlerDetails(w, name)
}
func listThrottlers(w http.ResponseWriter, m *managerImpl) {
throttlers := m.Throttlers()
listTemplate.Execute(w, map[string]interface{}{
"Throttlers": throttlers,
})
}
func showThrottlerDetails(w http.ResponseWriter, name string) {
detailsTemplate.Execute(w, name)
}