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debug.go
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debug.go
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// Copyright 2009 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
package rpcplus
/*
Some HTML presented at http://machine:port/debug/rpc
Lists services, their methods, and some statistics, still rudimentary.
*/
import (
"fmt"
"net/http"
"sort"
"text/template"
)
const debugText = `<html>
<body>
<title>Services</title>
{{range .}}
<hr>
Service {{.Name}}
<hr>
<table>
<th align=center>Method</th><th align=center>Calls</th>
{{range .Method}}
<tr>
<td align=left font=fixed>{{.Name}}({{.Type.ArgType}}, {{.Type.ReplyType}}) error</td>
<td align=center>{{.Type.NumCalls}}</td>
</tr>
{{end}}
</table>
{{end}}
</body>
</html>`
var debug = template.Must(template.New("RPC debug").Parse(debugText))
type debugMethod struct {
Type *methodType
Name string
}
type methodArray []debugMethod
type debugService struct {
Service *service
Name string
Method methodArray
}
type serviceArray []debugService
func (s serviceArray) Len() int { return len(s) }
func (s serviceArray) Less(i, j int) bool { return s[i].Name < s[j].Name }
func (s serviceArray) Swap(i, j int) { s[i], s[j] = s[j], s[i] }
func (m methodArray) Len() int { return len(m) }
func (m methodArray) Less(i, j int) bool { return m[i].Name < m[j].Name }
func (m methodArray) Swap(i, j int) { m[i], m[j] = m[j], m[i] }
type debugHTTP struct {
*Server
}
// Runs at /debug/rpc
func (server debugHTTP) ServeHTTP(w http.ResponseWriter, req *http.Request) {
// Build a sorted version of the data.
var services = make(serviceArray, len(server.serviceMap))
i := 0
server.mu.Lock()
for sname, service := range server.serviceMap {
services[i] = debugService{service, sname, make(methodArray, len(service.method))}
j := 0
for mname, method := range service.method {
services[i].Method[j] = debugMethod{method, mname}
j++
}
sort.Sort(services[i].Method)
i++
}
server.mu.Unlock()
sort.Sort(services)
err := debug.Execute(w, services)
if err != nil {
fmt.Fprintln(w, "rpc: error executing template:", err.Error())
}
}