github.com/varialus/godfly@v0.0.0-20130904042352-1934f9f095ab/src/pkg/net/rpc/debug.go (about)

     1  // Copyright 2009 The Go Authors. All rights reserved.
     2  // Use of this source code is governed by a BSD-style
     3  // license that can be found in the LICENSE file.
     4  
     5  package rpc
     6  
     7  /*
     8  	Some HTML presented at http://machine:port/debug/rpc
     9  	Lists services, their methods, and some statistics, still rudimentary.
    10  */
    11  
    12  import (
    13  	"fmt"
    14  	"net/http"
    15  	"sort"
    16  	"text/template"
    17  )
    18  
    19  const debugText = `<html>
    20  	<body>
    21  	<title>Services</title>
    22  	{{range .}}
    23  	<hr>
    24  	Service {{.Name}}
    25  	<hr>
    26  		<table>
    27  		<th align=center>Method</th><th align=center>Calls</th>
    28  		{{range .Method}}
    29  			<tr>
    30  			<td align=left font=fixed>{{.Name}}({{.Type.ArgType}}, {{.Type.ReplyType}}) error</td>
    31  			<td align=center>{{.Type.NumCalls}}</td>
    32  			</tr>
    33  		{{end}}
    34  		</table>
    35  	{{end}}
    36  	</body>
    37  	</html>`
    38  
    39  var debug = template.Must(template.New("RPC debug").Parse(debugText))
    40  
    41  type debugMethod struct {
    42  	Type *methodType
    43  	Name string
    44  }
    45  
    46  type methodArray []debugMethod
    47  
    48  type debugService struct {
    49  	Service *service
    50  	Name    string
    51  	Method  methodArray
    52  }
    53  
    54  type serviceArray []debugService
    55  
    56  func (s serviceArray) Len() int           { return len(s) }
    57  func (s serviceArray) Less(i, j int) bool { return s[i].Name < s[j].Name }
    58  func (s serviceArray) Swap(i, j int)      { s[i], s[j] = s[j], s[i] }
    59  
    60  func (m methodArray) Len() int           { return len(m) }
    61  func (m methodArray) Less(i, j int) bool { return m[i].Name < m[j].Name }
    62  func (m methodArray) Swap(i, j int)      { m[i], m[j] = m[j], m[i] }
    63  
    64  type debugHTTP struct {
    65  	*Server
    66  }
    67  
    68  // Runs at /debug/rpc
    69  func (server debugHTTP) ServeHTTP(w http.ResponseWriter, req *http.Request) {
    70  	// Build a sorted version of the data.
    71  	var services = make(serviceArray, len(server.serviceMap))
    72  	i := 0
    73  	server.mu.Lock()
    74  	for sname, service := range server.serviceMap {
    75  		services[i] = debugService{service, sname, make(methodArray, len(service.method))}
    76  		j := 0
    77  		for mname, method := range service.method {
    78  			services[i].Method[j] = debugMethod{method, mname}
    79  			j++
    80  		}
    81  		sort.Sort(services[i].Method)
    82  		i++
    83  	}
    84  	server.mu.Unlock()
    85  	sort.Sort(services)
    86  	err := debug.Execute(w, services)
    87  	if err != nil {
    88  		fmt.Fprintln(w, "rpc: error executing template:", err.Error())
    89  	}
    90  }