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package comms
import (
"fmt"
"net/http"
"strings"
"github.com/ethereum/go-ethereum/logger"
"github.com/ethereum/go-ethereum/logger/glog"
"github.com/ethereum/go-ethereum/rpc/api"
"github.com/ethereum/go-ethereum/rpc/codec"
"github.com/rs/cors"
)
var (
// main HTTP rpc listener
httpListener *stoppableTCPListener
listenerStoppedError = fmt.Errorf("Listener has stopped")
)
type HttpConfig struct {
ListenAddress string
ListenPort uint
CorsDomain string
}
func StartHttp(cfg HttpConfig, codec codec.Codec, apis ...api.EthereumApi) error {
if httpListener != nil {
if fmt.Sprintf("%s:%d", cfg.ListenAddress, cfg.ListenPort) != httpListener.Addr().String() {
return fmt.Errorf("RPC service already running on %s ", httpListener.Addr().String())
}
return nil // RPC service already running on given host/port
}
l, err := newStoppableTCPListener(fmt.Sprintf("%s:%d", cfg.ListenAddress, cfg.ListenPort))
if err != nil {
glog.V(logger.Error).Infof("Can't listen on %s:%d: %v", cfg.ListenAddress, cfg.ListenPort, err)
return err
}
httpListener = l
api := api.Merge(apis...)
var handler http.Handler
if len(cfg.CorsDomain) > 0 {
var opts cors.Options
opts.AllowedMethods = []string{"POST"}
opts.AllowedOrigins = strings.Split(cfg.CorsDomain, " ")
c := cors.New(opts)
handler = newStoppableHandler(c.Handler(gethHttpHandler(codec, api)), l.stop)
} else {
handler = newStoppableHandler(gethHttpHandler(codec, api), l.stop)
}
go http.Serve(l, handler)
return nil
}
func StopHttp() {
if httpListener != nil {
httpListener.Stop()
httpListener = nil
}
}
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