func (up UpstreamPool) pingUpstreams() {
pingable := true
for pingable {
select {
case <-up.shutdown:
return
case <-up.pinger.C:
gotone := false
for i, ups := range up.pool {
if ups.Upstream.PingPath != "" {
go up.pingUpstream(ups, i)
gotone = true
}
}
if !gotone {
pingable = false
}
}
}
falcore.Warn("Stopping ping for %v", up.Name)
}
func NewUpstream(host string, port int, forceHttp bool) *Upstream {
u := new(Upstream)
u.Host = host
u.Port = port
u.ForceHttp = forceHttp
ips, err := net.LookupIP(host)
var ip net.IP = nil
for i := range ips {
ip = ips[i].To4()
if ip != nil {
break
}
}
if err == nil && ip != nil {
u.tcpaddr = new(net.TCPAddr)
u.tcpaddr.Port = port
u.tcpaddr.IP = ip
} else {
falcore.Warn("Can't get IP addr for %v: %v", host, err)
}
u.Timeout = 60e9
u.host = fmt.Sprintf("%v:%v", u.Host, u.Port)
u.transport = new(http.Transport)
u.transport.Dial = func(n, addr string) (c net.Conn, err os.Error) {
falcore.Fine("Dialing connection to %v", u.tcpaddr)
var ctcp *net.TCPConn
ctcp, err = net.DialTCP("tcp4", nil, u.tcpaddr)
if ctcp != nil {
ctcp.SetTimeout(u.Timeout)
}
if err != nil {
falcore.Error("Dial Failed: %v", err)
}
return ctcp, err
}
u.transport.MaxIdleConnsPerHost = 15
return u
}