Mic92/vpn-status
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Jörg Thalheim 2013-10-04 00:19:10 +02:00
commit 1364a13a8d
5 changed files with 175 additions and 0 deletions
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3
assets/app.css Normal file
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.loading {
cursor: progress;
}

23
assets/app.js Normal file
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$(function() {
$("#nodeTable tr[data-node]").each(function(){
var $this = $(this);
var node = $this.data("node");
$.getJSON("/status/"+node, function (data) {
$this.find("span.loading").hide();
var label;
if (data["Status"] === "UP") {
label = "label-success";
$this.addClass("success");
$this.find("td.ping").text(data["Ping"] + "ms");
} else if (data["Status"] === "SLOW") {
label = "label-warning";
$this.addClass("warning");
$this.find("td.ping").text(data["Ping"] + "ms");
} else {
label = "label-danger";
$this.addClass("danger");
}
$this.find("span.status").addClass(label).text(data["Status"]);
})
});
})

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html/index.html Normal file
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<!DOCTYPE html>
<html>
<head>
<title>{{.Title}}</title>
<meta charset="utf-8" />
<link href="//netdna.bootstrapcdn.com/bootstrap/3.0.0/css/bootstrap.min.css" rel="stylesheet">
<link href="//netdna.bootstrapcdn.com/font-awesome/3.2.1/css/font-awesome.min.css" rel="stylesheet">
<script src="//ajax.googleapis.com/ajax/libs/jquery/1.10.2/jquery.min.js" type="text/javascript"></script>
<script src="//netdna.bootstrapcdn.com/bootstrap/3.0.0/js/bootstrap.min.js" type="text/javascript"></script>
<script src="/assets/app.js" type="text/javascript" charset="utf-8"></script>
<link rel="stylesheet" type="text/css" href="/assets/app.css">
</head>
<body>
<div class="panel panel-default">
<!-- Default panel contents -->
<div class="panel-heading">{{.Title}}</div>
<table class="table" id="nodeTable">
<tr>
<th>Host</th>
<th>Status</th>
<th>Ping</th>
</tr>
{{range $node := .Nodes}}
<tr data-node="{{$node}}">
<td class="host">{{$node}}</td>
<td>
<span class="loading"><i class="icon-spinner icon-spin"></i>Loading...</span>
<span class="status label"></span>
</td>
<td class="ping">
-
</td>
</tr>
{{end}}
</table>
</div>
</body>

1
nodes.json Normal file
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["matchbox.vpn", "turingmachine.vpn", "higgsboson.vpn", "devkid-router.vpn", "devkid-desktop.vpn", "devkid-server.vpn", "devkid-nas.vpn"]

111
server.go Normal file
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package main
import (
"fmt"
"net/http"
"html/template"
"os/exec"
"os"
"regexp"
"strconv"
"bytes"
"encoding/json"
)
var indexTemplate = template.Must(template.ParseFiles("html/index.html"))
var nodeList = []string{"higgsboson.vpn","turingmachine.vpn"}
func stringInSlice(a string, list []string) bool {
for _, b := range list {
if b == a {
return true
}
}
return false
}
type IndexPage struct {
Title string
Nodes []string
}
type Status int
const (
On Status = iota
Off
Slow
)
func indexHandler(w http.ResponseWriter, r *http.Request) {
indexTemplate.Execute(w, &IndexPage{Title: "VPN Node Status", Nodes: nodeList})
}
func ping(node string) (int64) {
cmd := exec.Command("fping", "-e", node)
var out bytes.Buffer
cmd.Stdout = &out
err := cmd.Run()
if err == nil {
match := regexp.MustCompile("\\d+").Find(out.Bytes())
if (match != nil) {
time, _ := strconv.ParseInt(string(match), 10, 0);
return time;
}
return -1
} else {
return -1
}
}
type NodeStatus struct {
Domain string
Status string
Ping int64
}
const lenPath = len("/status/")
func statusHandler(w http.ResponseWriter, r *http.Request) {
node := r.URL.Path[lenPath:];
if ! stringInSlice(node, nodeList) {
w.WriteHeader(http.StatusNotFound)
} else {
var state string
elapsed := ping(node);
if elapsed == -1 {
state = "DOWN"
} else if elapsed > 200 {
state = "SLOW"
} else {
state = "UP"
}
status := &NodeStatus{Domain: node, Status: state, Ping: elapsed}
s, err := json.Marshal(status)
if err != nil {
w.WriteHeader(http.StatusInternalServerError)
fmt.Printf("error while serializing json %s", err)
} else {
w.Write(s)
}
}
}
func main() {
config, err := os.Open("./nodes.json")
if err != nil {
fmt.Printf("Cannot open nodes.json: '%s'", err)
os.Exit(1);
}
jsonParser := json.NewDecoder(config)
if err = jsonParser.Decode(&nodeList); err != nil {
fmt.Printf("parsing config file: '%s'", err.Error())
os.Exit(1);
}
http.HandleFunc("/status/", statusHandler)
http.Handle("/assets/", http.StripPrefix("/assets", http.FileServer(http.Dir("./assets/"))))
http.HandleFunc("/", indexHandler)
http.ListenAndServe(":8080", nil)
fmt.Printf("Running on 8080")
}