| // 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" |
| "html/template" |
| "net/http" |
| "sort" |
| ) |
| |
| 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)) |
| |
| // If set, print log statements for internal and I/O errors. |
| var debugLog = false |
| |
| 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 serviceArray |
| server.serviceMap.Range(func(snamei, svci interface{}) bool { |
| svc := svci.(*service) |
| ds := debugService{svc, snamei.(string), make(methodArray, 0, len(svc.method))} |
| for mname, method := range svc.method { |
| ds.Method = append(ds.Method, debugMethod{method, mname}) |
| } |
| sort.Sort(ds.Method) |
| services = append(services, ds) |
| return true |
| }) |
| sort.Sort(services) |
| err := debug.Execute(w, services) |
| if err != nil { |
| fmt.Fprintln(w, "rpc: error executing template:", err.Error()) |
| } |
| } |
