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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 rpc

/*

        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 = `

        {{range .}}

        Service {{.Name}}

                

      
      

         
27
         

         

         
                
Method
Calls
      
      

         
28
         

         

         
                {{range .Method}}
      
      

         
29
         

         

         
                        

      
      

         
30
         

         

         
                        
{{.Name}}({{.Type.ArgType}}, {{.Type.ReplyType}}) error
      
      

         
31
         

         

         
                        
{{.Type.NumCalls}}
      
      

         
32
         

         

         
                        
      
      

         
33
         

         

         
                {{end}}
      
      

         
34
         

         

         
                

        {{end}}

        `

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())

        }

}