func (p *proxyRoundTripper) RoundTrip(request *http.Request) (*http.Response, error) {
var err error
var res *http.Response
var endpoint *route.Endpoint
retry := 0
for {
endpoint = p.iter.Next()
if endpoint == nil {
p.handler.reporter.CaptureBadGateway(request)
err = noEndpointsAvailable
p.handler.HandleBadGateway(err)
return nil, err
}
request.URL.Host = endpoint.CanonicalAddr()
request.Header.Set("X-CF-ApplicationID", endpoint.CanonicalAddr())
setRequestXCfInstanceId(request, endpoint)
res, err = p.transport.RoundTrip(request)
if err == nil {
break
}
if ne, netErr := err.(*net.OpError); !netErr || ne.Op != "dial" {
break
}
p.iter.EndpointFailed()
p.handler.Logger().Set("Error", err.Error())
p.handler.Logger().Warnf("proxy.endpoint.failed")
retry++
if retry == retries {
break
}
}
if p.after != nil {
p.after(res, endpoint, err)
}
p.response = res
p.err = err
return res, err
}
func setRequestXCfInstanceId(request *http.Request, endpoint *route.Endpoint) {
value := endpoint.CanonicalAddr()
request.Header.Set(router_http.CfInstanceIdHeader, value)
}
func (x *RealVarz) CaptureAppStats(b *route.Endpoint, t time.Time) {
if b.CanonicalAddr() != "" {
x.activeApps.Mark(b.CanonicalAddr(), t)
x.topApps.Mark(b.CanonicalAddr(), t)
}
}
func (h *RequestHandler) setupRequest(endpoint *route.Endpoint) {
h.setRequestURL(endpoint.CanonicalAddr())
h.setRequestXForwardedFor()
setRequestXRequestStart(h.request)
setRequestXVcapRequestId(h.request, h.logger)
}