52 lines
1.3 KiB
Go
52 lines
1.3 KiB
Go
package middlewares
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import (
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"net/http"
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"strings"
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"time"
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log "github.com/Sirupsen/logrus"
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"github.com/mailgun/oxy/roundrobin"
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)
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// WebsocketUpgrader holds Websocket configuration.
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type WebsocketUpgrader struct {
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rr *roundrobin.RoundRobin
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}
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// NewWebsocketUpgrader returns a new WebsocketUpgrader.
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func NewWebsocketUpgrader(rr *roundrobin.RoundRobin) *WebsocketUpgrader {
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wu := WebsocketUpgrader{
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rr: rr,
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}
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return &wu
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}
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func (u *WebsocketUpgrader) ServeHTTP(w http.ResponseWriter, req *http.Request) {
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// If request is websocket, serve with golang websocket server to do protocol handshake
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if strings.Join(req.Header["Upgrade"], "") == "websocket" {
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start := time.Now().UTC()
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url, err := u.rr.NextServer()
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if err != nil {
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log.Errorf("Can't round robin in websocket middleware")
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return
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}
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log.Debugf("Websocket forward to %s", url.String())
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NewProxy(url).ServeHTTP(w, req)
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if req.TLS != nil {
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log.Debugf("Round trip: %v, duration: %v tls:version: %x, tls:resume:%t, tls:csuite:%x, tls:server:%v",
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req.URL, time.Now().UTC().Sub(start),
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req.TLS.Version,
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req.TLS.DidResume,
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req.TLS.CipherSuite,
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req.TLS.ServerName)
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} else {
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log.Debugf("Round trip: %v, duration: %v",
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req.URL, time.Now().UTC().Sub(start))
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}
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return
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}
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u.rr.ServeHTTP(w, req)
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}
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