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status.go
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/
status.go
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/*
Copyright 2017 Google Inc.
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/
package worker
import (
"fmt"
"html/template"
"net/http"
"strings"
"github.com/xsec-lab/go/acl"
"github.com/xsec-lab/go/vt/servenv"
)
const workerStatusPartHTML = servenv.JQueryIncludes + `
<script type="text/javascript">
$(function() {
getStatus();
});
function getStatus() {
$('div#status').load('/status');
setTimeout("getStatus()",10000);
}
</script>
<div id="status"></div>
`
const workerStatusHTML = `
<html>
<head>
<title>Worker Status</title>
</head>
<body>
{{if .Status}}
<h2>Worker status:</h2>
<blockquote>
{{.Status}}
</blockquote>
<h2>Worker logs:</h2>
<blockquote>
{{.Logs}}
</blockquote>
{{if .Done}}
<p><a href="/reset">Reset Job</a></p>
{{else}}
<p><a href="/cancel">Cancel Job</a></p>
{{end}}
{{else}}
<p>This worker is idle.</p>
<p><a href="/">Toplevel Menu</a></p>
{{end}}
</body>
</html>
`
// InitStatusHandling installs webserver handlers for global actions like /status, /reset and /cancel.
func (wi *Instance) InitStatusHandling() {
// code to serve /status
workerTemplate := mustParseTemplate("worker", workerStatusHTML)
http.HandleFunc("/status", func(w http.ResponseWriter, r *http.Request) {
if err := acl.CheckAccessHTTP(r, acl.ADMIN); err != nil {
acl.SendError(w, err)
return
}
wi.currentWorkerMutex.Lock()
wrk := wi.currentWorker
logger := wi.currentMemoryLogger
ctx := wi.currentContext
err := wi.lastRunError
stopTime := wi.lastRunStopTime
wi.currentWorkerMutex.Unlock()
data := make(map[string]interface{})
if wrk != nil {
status := template.HTML("Current worker:<br>\n") + wrk.StatusAsHTML()
if ctx == nil {
data["Done"] = true
if err != nil {
status += template.HTML(fmt.Sprintf("<br>\nEnded with an error: %v<br>\n", err))
}
status += template.HTML(fmt.Sprintf("<br>\n<b>End Time:</b> %v<br>\n", stopTime))
}
data["Status"] = status
if logger != nil {
data["Logs"] = template.HTML(strings.Replace(logger.String(), "\n", "</br>\n", -1))
} else {
data["Logs"] = template.HTML("See console for logs</br>\n")
}
}
executeTemplate(w, workerTemplate, data)
})
// add the section in status that does auto-refresh of status div
servenv.AddStatusPart("Worker Status", workerStatusPartHTML, func() interface{} {
return nil
})
// reset handler
http.HandleFunc("/reset", func(w http.ResponseWriter, r *http.Request) {
if err := acl.CheckAccessHTTP(r, acl.ADMIN); err != nil {
acl.SendError(w, err)
return
}
if err := wi.Reset(); err != nil {
httpError(w, err.Error(), nil)
} else {
// No worker currently running, we go to the menu.
http.Redirect(w, r, "/", http.StatusTemporaryRedirect)
}
})
// cancel handler
http.HandleFunc("/cancel", func(w http.ResponseWriter, r *http.Request) {
if err := acl.CheckAccessHTTP(r, acl.ADMIN); err != nil {
acl.SendError(w, err)
return
}
if wi.Cancel() {
// We canceled the running worker. Go back to the status page.
http.Redirect(w, r, servenv.StatusURLPath(), http.StatusTemporaryRedirect)
} else {
// No worker, or not running, we go to the menu.
http.Redirect(w, r, "/", http.StatusTemporaryRedirect)
}
})
}