func (p *Pool) Handle(logRecord *logger.HAProxyLogRecord) {
pTime := time.Now()
if p.Dummy {
logger.Printf("[pool %s] Dummy", p.Name)
logRecord.Error(logger.BadGatewayMsg, http.StatusBadGateway)
logRecord.Terminate("Pool: " + logger.BadGatewayMsg)
return
}
p.Metrics.ConnectionStart()
defer p.Metrics.ConnectionDone()
server := p.Next()
if server == nil {
// reachable when all servers in pool report StatusMaintenance
logger.Printf("[pool %s] no server", p.Name)
logRecord.Error(logger.ServiceUnavailableMsg, http.StatusServiceUnavailable)
logRecord.Terminate("Pool: " + logger.ServiceUnavailableMsg)
return
}
logRecord.PoolUpdateRecord(p.Name, p.Metrics.GetActiveConnections(), p.Metrics.GetTotalConnections(), pTime)
server.Handle(logRecord, p.Config.RequestTimeout)
}
func (s *Server) Handle(logRecord *logger.HAProxyLogRecord, tout time.Duration) {
sTime := time.Now()
s.Metrics.RequestStart()
defer s.Metrics.RequestDone()
// X-Forwarded-For; we are a proxy.
ip := strings.Split(logRecord.Request.RemoteAddr, ":")[0]
logRecord.Request.Header.Add("X-Forwarded-For", ip)
logRecord.ServerUpdateRecord(s.Address, s.Metrics.RequestsServiced, s.Metrics.Cost(), sTime)
resErrCh := make(chan ResponseError)
tstart := time.Now()
go s.RoundTrip(logRecord.Request, resErrCh)
tend := time.Now()
logRecord.UpdateTr(tstart, tend)
select {
case resErr := <-resErrCh:
if resErr.Error == nil {
defer resErr.Response.Body.Close()
logRecord.CopyHeaders(resErr.Response.Header)
logRecord.WriteHeader(resErr.Response.StatusCode)
err := logRecord.Copy(resErr.Response.Body)
if err != nil {
logger.Errorf("[server %s] failed attempting to copy response body: %s\n", s.Address, err)
} else {
logRecord.Log()
}
} else {
logger.Errorf("[server %s] failed attempting the roundtrip: %s\n", s.Address, resErr.Error)
logRecord.Error(logger.BadGatewayMsg, http.StatusBadGateway)
logRecord.Terminate("Server: " + logger.BadGatewayMsg)
}
case <-time.After(tout):
s.Transport.CancelRequest(logRecord.Request)
logger.Printf("[server %s] round trip timed out!", s.Address)
logRecord.Error(logger.GatewayTimeoutMsg, http.StatusGatewayTimeout)
logRecord.Terminate("Server: " + logger.GatewayTimeoutMsg)
}
}