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manager.go
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manager.go
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package kone
import (
"bytes"
"fmt"
"html/template"
"io"
"net/http"
"strings"
"time"
)
const masterTmpl = `
{{define "header"}}
<!DOCTYPE HTML>
<html>
<head>
<title>{{.Title}}</title>
<meta charset='utf-8'>
<style>
a {
color: #428BCA;
text-decoration: none;
}
a:hover, a:focus {
color: #2A6496;
text-decoration: underline;
}
/**
* Styles for TABLE that uses a thin collapsed border.
*/
table {
border-collapse: collapse;
}
table, table th, table td {
border: 1px solid #777;
padding-left: 4px;
padding-right: 4px;
}
table td {
text-align: right;
}
table th {
background: rgb(224,236,255);
text-align: left;
}
table th.title {
background: rgb(255,217,217);
}
</style>
</head>
<body>
{{end}}
{{define "footer"}}
</body>
</html>
{{end}}
{{define "index"}}
{{template "header" .}}
<h2>List of URLs</h2>
<ul>
{{range .URLs}}
<li><a href='{{.}}'>{{.}}</a></li>
{{end}}
</ul>
<hr>
<h2>Current State</h2>
<table>
<tr><th>Total Hosts</th><td>{{.TotalHosts}}</td></tr>
<tr><th>Total Websites</th><td>{{.TotalWebistes}}</td></tr>
<tr><th>Total Proxies</th><td>{{.TotalProxies}}</td></tr>
<tr><th>Total Traffic</th><td>{{formatNumberComma .TotalTraffic}}</td></tr>
<tr><th>Upload Traffic</th><td>{{formatNumberComma .UploadTraffic}}</td></tr>
<tr><th>Download Traffic</th><td>{{formatNumberComma .DownloadTraffic}}</td></tr>
<tr><th>Uptime</th><td>{{.Uptime}}</td></tr>
<tr><th>Now</th><td>{{.Now.Format "2006-01-02 15:04:05.000"}}</td></tr>
</table>
{{template "footer" .}}
{{end}}
{{define "traffic_record"}}
{{template "header" .}}
<h2>{{.Title}}</h2>
<ul>
<li>Entries: {{len .Records}}</li>
<li>Total: {{sumInt64 .Upload .Download | formatNumberComma}}</li>
<li>Upload: {{formatNumberComma .Upload}}</li>
<li>Download: {{formatNumberComma .Download}}</li>
</ul>
<table>
<tr>
<th>Name</th>
<th>Total</th>
<th>Upload</th>
<th>Download</th>
<th>Last</th>
</tr>
{{range .Records}}
<tr>
<td>
{{if $.HasDetail}}
<a href="{{.Name}}">{{.Name}}</a>
{{else}}
{{.Name}}
{{end}}
</td>
<td>{{sumInt64 .Upload .Download | formatNumberComma}}</td>
<td>{{formatNumberComma .Upload}}</td>
<td>{{formatNumberComma .Download}}</td>
<td>{{.Touch.Format "2006-01-02 15:04:05.000"}}</td>
</tr>
{{end}}
</table>
{{template "footer" .}}
{{end}}
{{define "traffic_record_detail"}}
{{template "header" .}}
{{with .Record}}
<h2>{{$.Title}}: {{.Name}}</h2>
<ul>
<li>Entries: {{len .Details}}</li>
<li>Total: {{sumInt64 .Upload .Download | formatNumberComma}}</li>
<li>Upload: {{formatNumberComma .Upload}}</li>
<li>Download: {{formatNumberComma .Download}}</li>
<li>Last: {{.Touch.Format "2006-01-02 15:04:05.000"}}</li>
</ul>
{{end}}
{{with .Record.Details}}
<table>
<tr>
<th>Name</th>
<th>Total</th>
<th>Upload</th>
<th>Download</th>
<th>Last</th>
</tr>
{{range .}}
<tr>
<td>{{.EndPoint}}</td>
<td>{{sumInt64 .Upload .Download | formatNumberComma}}</td>
<td>{{formatNumberComma .Upload}}</td>
<td>{{formatNumberComma .Download}}</td>
<td>{{.Touch.Format "2006-01-02 15:04:05.000"}}</td>
</tr>
{{end}}
</table>
{{end}}
{{template "footer" .}}
{{end}}
{{define "dns"}}
{{template "header" .}}
<h2>Current State</h2>
<ul>
<li>Dns server: {{.DnsServer}}</li>
<li>Active entries: {{.ActiveEntries}}</li>
<li>Expired entries:{{.ExpiredEntries}}</li>
</ul>
<table>
<tr>
<th>Hostname</th>
<th>Address</th>
<th>Proxy</th>
<th>Hits</th>
<th>Expires</th>
</tr>
{{range .Records}}
<tr>
<td>{{.Hostname}}</td>
<td>{{.IP}}</td>
<td>{{.Proxy}}</td>
<td>{{.Hits}}</td>
<td>{{.Expires.Format "2006-01-02 15:04:05.000"}}{{if .Expires.Before $.Now}}<span style="color:red">[expired]</span>{{end}}</td>
</tr>
{{end}}
</table>
{{template "footer" .}}
{{end}}
{{define "config"}}
{{template "header" .}}
<h2>Config</h2>
<ul>
<li>rules: {{.RuleCount}}</li>
</ul>
<table>
<tr>
<th>Source</th>
</tr>
<tr>
<td style="text-align:left;"><pre>{{.Source}}</pre></td>
</tr>
</table>
{{template "footer" .}}
{{end}}
`
// statistical data of every connection
type ConnData struct {
Src string
Dst string
Proxy string
Upload int64
Download int64
}
// statistical data of every host/website/proxy
type TrafficRecordDetail struct {
EndPoint string
Upload int64
Download int64
Touch time.Time
}
type TrafficRecord struct {
Name string
Upload int64
Download int64
Touch time.Time
Details map[string]*TrafficRecordDetail
}
type Manager struct {
one *One
cfg *KoneConfig
startTime time.Time // process start time
listen string
tmpl *template.Template
dataCh chan ConnData
hosts map[string]*TrafficRecord
websites map[string]*TrafficRecord
proxies map[string]*TrafficRecord
}
func handleWrapper(f func(io.Writer, *http.Request) error) func(http.ResponseWriter, *http.Request) {
return func(rw http.ResponseWriter, r *http.Request) {
w := bytes.NewBuffer(nil)
err := f(w, r)
if err != nil {
http.Error(rw, fmt.Sprintf("Internal server error: %s", err), http.StatusInternalServerError)
} else {
rw.Write(w.Bytes())
}
}
}
func (m *Manager) indexHandle(w io.Writer, r *http.Request) error {
var upload, download int64
for _, v := range m.proxies {
upload += v.Upload
download += v.Download
}
return m.tmpl.ExecuteTemplate(w, "index", map[string]interface{}{
"Title": "kone",
"Now": time.Now(),
"Uptime": time.Since(m.startTime),
"TotalHosts": len(m.hosts),
"TotalWebistes": len(m.websites),
"TotalProxies": len(m.proxies),
"TotalTraffic": upload + download,
"UploadTraffic": upload,
"DownloadTraffic": download,
"URLs": []string{
"/host/",
"/website/",
"/proxy/",
"/dns/",
"/reload/",
"/config/",
},
})
}
func (m *Manager) hostHandle(w io.Writer, r *http.Request) error {
name := strings.TrimPrefix(r.RequestURI, "/host/")
record, ok := m.hosts[name]
if ok {
return m.tmpl.ExecuteTemplate(w, "traffic_record_detail", map[string]interface{}{
"Title": "Host Record Detail",
"Record": record,
})
} else {
var upload, download int64
for _, v := range m.hosts {
upload += v.Upload
download += v.Download
}
return m.tmpl.ExecuteTemplate(w, "traffic_record", map[string]interface{}{
"Title": "Host Record",
"Upload": upload,
"Download": download,
"Records": m.hosts,
"HasDetail": true,
})
}
}
func (m *Manager) websiteHandle(w io.Writer, r *http.Request) error {
name := strings.TrimPrefix(r.RequestURI, "/website/")
record, ok := m.websites[name]
if ok {
return m.tmpl.ExecuteTemplate(w, "traffic_record_detail", map[string]interface{}{
"Title": "Website Record Detail",
"Record": record,
})
} else {
var upload, download int64
for _, v := range m.websites {
upload += v.Upload
download += v.Download
}
return m.tmpl.ExecuteTemplate(w, "traffic_record", map[string]interface{}{
"Title": "Website Record",
"Upload": upload,
"Download": download,
"Records": m.websites,
"HasDetail": true,
})
}
}
func (m *Manager) proxyHandle(w io.Writer, r *http.Request) error {
var upload, download int64
for _, v := range m.proxies {
upload += v.Upload
download += v.Download
}
return m.tmpl.ExecuteTemplate(w, "traffic_record", map[string]interface{}{
"Title": "Proxy Data",
"Upload": upload,
"Download": download,
"Records": m.proxies,
})
}
func (m *Manager) dnsHandle(w io.Writer, r *http.Request) error {
records := m.one.dnsTable.records
activeEntries, expiredEntires := 0, 0
now := time.Now()
for _, record := range records {
if record.Expires.Before(now) {
expiredEntires += 1
} else {
activeEntries += 1
}
}
return m.tmpl.ExecuteTemplate(w, "dns", map[string]interface{}{
"Title": "dns cache",
"DnsServer": strings.Join(m.one.dns.nameservers, ","),
"ActiveEntries": activeEntries,
"ExpiredEntries": expiredEntires,
"Now": now,
"Records": records,
})
}
func (m *Manager) reloadHandle(w io.Writer, r *http.Request) error {
logger.Infof("[manager] reload config")
newcfg, err := ParseConfig(m.cfg.source)
if err != nil {
return err
}
err = m.one.Reload(newcfg)
if err != nil {
return err
}
m.cfg = newcfg
w.Write([]byte("reload succeed"))
return nil
}
func (m *Manager) configHandle(w io.Writer, r *http.Request) error {
b := bytes.NewBuffer([]byte{})
m.cfg.inif.WriteTo(b)
return m.tmpl.ExecuteTemplate(w, "config", map[string]interface{}{
"Title": "Config",
"RuleCount": len(m.cfg.Rule),
"Source": string(b.Bytes()),
})
}
// statistical data api
func (m *Manager) consumeData() {
accumulate := func(s map[string]*TrafficRecord, name string, endpoint string, upload int64, download int64, now time.Time) {
o, ok := s[name]
if ok {
o.Upload += upload
o.Download += download
o.Touch = now
} else {
o = &TrafficRecord{
Name: name,
Upload: upload,
Download: download,
Touch: now,
Details: make(map[string]*TrafficRecordDetail),
}
s[name] = o
}
if len(endpoint) == 0 {
return
}
if d, ok := o.Details[endpoint]; ok {
d.Upload += upload
d.Download += download
d.Touch = now
} else {
o.Details[endpoint] = &TrafficRecordDetail{
EndPoint: endpoint,
Upload: upload,
Download: download,
Touch: now,
}
}
}
for data := range m.dataCh {
now := time.Now()
accumulate(m.hosts, data.Src, data.Dst, data.Upload, data.Download, now)
accumulate(m.websites, data.Dst, data.Src, data.Upload, data.Download, now)
accumulate(m.proxies, data.Proxy, "", data.Upload, data.Download, now)
}
}
func (m *Manager) Serve() error {
http.HandleFunc("/", handleWrapper(m.indexHandle))
http.HandleFunc("/host/", handleWrapper(m.hostHandle))
http.HandleFunc("/website/", handleWrapper(m.websiteHandle))
http.HandleFunc("/proxy/", handleWrapper(m.proxyHandle))
http.HandleFunc("/dns/", handleWrapper(m.dnsHandle))
http.HandleFunc("/reload/", handleWrapper(m.reloadHandle))
http.HandleFunc("/config/", handleWrapper(m.configHandle))
go m.consumeData()
logger.Infof("[manager] listen on: %s", m.listen)
return http.ListenAndServe(m.listen, nil)
}
func NewManager(one *One, cfg *KoneConfig) *Manager {
if cfg.General.ManagerAddr == "" {
return nil
}
tmpl := template.New("master").Funcs(map[string]interface{}{
"sumInt64": func(a int64, b int64) int64 {
return a + b
},
"formatNumberComma": func(a int64) string {
var sign, ret string
if a == 0 {
return "0"
}
if a < 0 {
sign, a = "-", -a
}
for a > 0 {
b := a % 1000
a = a / 1000
var flag string
if a > 0 {
flag = "%03d"
} else {
flag = "%d"
}
if len(ret) > 0 {
flag += ",%s"
} else {
flag += "%s"
}
ret = fmt.Sprintf(flag, b, ret)
}
return sign + ret
},
})
return &Manager{
one: one,
cfg: cfg,
startTime: time.Now(),
listen: cfg.General.ManagerAddr,
dataCh: make(chan ConnData),
hosts: make(map[string]*TrafficRecord),
websites: make(map[string]*TrafficRecord),
proxies: make(map[string]*TrafficRecord),
tmpl: template.Must(tmpl.Parse(masterTmpl)),
}
}