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ping_cmd.go
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ping_cmd.go
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// Copyright 2015, Google Inc. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
package worker
import (
"flag"
"fmt"
"html/template"
"net/http"
"github.com/youtube/vitess/go/vt/wrangler"
"golang.org/x/net/context"
)
const pingHTML = `
<!DOCTYPE html>
<head>
<title>Ping Action</title>
</head>
<body>
<h1>Ping Action</h1>
{{if .Error}}
<b>Error:</b> {{.Error}}</br>
{{else}}
<form action="/Debugging/Ping" method="post">
<LABEL for="message">Message to be logged with level CONSOLE: </LABEL>
<INPUT type="text" id="message" name="message" value="pong"></BR>
<INPUT type="submit" value="Ping"/>
</form>
{{end}}
</body>
`
var pingTemplate = mustParseTemplate("ping", pingHTML)
func commandPing(wi *Instance, wr *wrangler.Wrangler, subFlags *flag.FlagSet, args []string) (Worker, error) {
if err := subFlags.Parse(args); err != nil {
return nil, err
}
if subFlags.NArg() != 1 {
subFlags.Usage()
return nil, fmt.Errorf("command Ping requires <message>")
}
message := subFlags.Arg(0)
worker, err := NewPingWorker(wr, message)
if err != nil {
return nil, fmt.Errorf("Could not create Ping worker: %v", err)
}
return worker, nil
}
func interactivePing(ctx context.Context, wi *Instance, wr *wrangler.Wrangler, w http.ResponseWriter, r *http.Request) (Worker, *template.Template, map[string]interface{}, error) {
if err := r.ParseForm(); err != nil {
return nil, nil, nil, fmt.Errorf("Cannot parse form: %s", err)
}
message := r.FormValue("message")
if message == "" {
result := make(map[string]interface{})
return nil, pingTemplate, result, nil
}
wrk, err := NewPingWorker(wr, message)
if err != nil {
return nil, nil, nil, fmt.Errorf("Could not create Ping worker: %v", err)
}
return wrk, nil, nil, nil
}
func init() {
AddCommand("Debugging", Command{"Ping",
commandPing, interactivePing,
"<message>",
"For internal tests only. <message> will be logged as CONSOLE output."})
}