131 lines
3.2 KiB
Go
131 lines
3.2 KiB
Go
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// +build httpstats
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package go9p
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import (
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"fmt"
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"io"
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"net/http"
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"sync"
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)
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var mux sync.RWMutex
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var stat map[string]http.Handler
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var httponce sync.Once
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func register(s string, h http.Handler) {
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mux.Lock()
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if stat == nil {
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stat = make(map[string]http.Handler)
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}
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if h == nil {
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delete(stat, s)
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} else {
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stat[s] = h
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}
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mux.Unlock()
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}
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func (srv *Srv) statsRegister() {
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httponce.Do(func() {
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http.HandleFunc("/go9p/", StatsHandler)
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go http.ListenAndServe(":6060", nil)
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})
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register("/go9p/srv/"+srv.Id, srv)
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}
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func (srv *Srv) statsUnregister() {
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register("/go9p/srv/"+srv.Id, nil)
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}
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func (srv *Srv) ServeHTTP(c http.ResponseWriter, r *http.Request) {
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io.WriteString(c, fmt.Sprintf("<html><body><h1>Server %s</h1>", srv.Id))
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defer io.WriteString(c, "</body></html>")
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// connections
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io.WriteString(c, "<h2>Connections</h2><p>")
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srv.Lock()
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defer srv.Unlock()
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if len(srv.conns) == 0 {
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io.WriteString(c, "none")
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return
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}
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for _, conn := range srv.conns {
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io.WriteString(c, fmt.Sprintf("<a href='/go9p/srv/%s/conn/%s'>%s</a><br>", srv.Id, conn.Id, conn.Id))
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}
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}
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func (conn *Conn) statsRegister() {
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register("/go9p/srv/"+conn.Srv.Id+"/conn/"+conn.Id, conn)
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}
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func (conn *Conn) statsUnregister() {
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register("/go9p/srv/"+conn.Srv.Id+"/conn/"+conn.Id, nil)
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}
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func (conn *Conn) ServeHTTP(c http.ResponseWriter, r *http.Request) {
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io.WriteString(c, fmt.Sprintf("<html><body><h1>Connection %s/%s</h1>", conn.Srv.Id, conn.Id))
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defer io.WriteString(c, "</body></html>")
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// statistics
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conn.Lock()
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io.WriteString(c, fmt.Sprintf("<p>Number of processed requests: %d", conn.nreqs))
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io.WriteString(c, fmt.Sprintf("<br>Sent %v bytes", conn.rsz))
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io.WriteString(c, fmt.Sprintf("<br>Received %v bytes", conn.tsz))
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io.WriteString(c, fmt.Sprintf("<br>Pending requests: %d max %d", conn.npend, conn.maxpend))
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io.WriteString(c, fmt.Sprintf("<br>Number of reads: %d", conn.nreads))
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io.WriteString(c, fmt.Sprintf("<br>Number of writes: %d", conn.nwrites))
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conn.Unlock()
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// fcalls
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if conn.Debuglevel&DbgLogFcalls != 0 {
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fs := conn.Srv.Log.Filter(conn, DbgLogFcalls)
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io.WriteString(c, fmt.Sprintf("<h2>Last %d 9P messages</h2>", len(fs)))
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for i, l := range fs {
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fc := l.Data.(*Fcall)
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if fc.Type == 0 {
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continue
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}
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lbl := ""
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if fc.Type%2 == 0 {
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// try to find the response for the T message
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for j := i + 1; j < len(fs); j++ {
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rc := fs[j].Data.(*Fcall)
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if rc.Tag == fc.Tag {
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lbl = fmt.Sprintf("<a href='#fc%d'>➴</a>", j)
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break
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}
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}
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} else {
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// try to find the request for the R message
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for j := i - 1; j >= 0; j-- {
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tc := fs[j].Data.(*Fcall)
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if tc.Tag == fc.Tag {
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lbl = fmt.Sprintf("<a href='#fc%d'>➶</a>", j)
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break
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}
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}
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}
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io.WriteString(c, fmt.Sprintf("<br id='fc%d'>%d: %s%s", i, i, fc, lbl))
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}
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}
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}
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func StatsHandler(c http.ResponseWriter, r *http.Request) {
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mux.RLock()
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if v, ok := stat[r.URL.Path]; ok {
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v.ServeHTTP(c, r)
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} else if r.URL.Path == "/go9p/" {
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io.WriteString(c, fmt.Sprintf("<html><body><br><h1>On offer: </h1><br>"))
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for v := range stat {
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io.WriteString(c, fmt.Sprintf("<a href='%s'>%s</a><br>", v, v))
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}
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io.WriteString(c, "</body></html>")
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}
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mux.RUnlock()
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}
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