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rpc.go
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rpc.go
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package main
import (
"context"
"encoding/json"
"net"
"net/http"
_ "net/http/pprof"
"os"
"os/signal"
"runtime"
"syscall"
"github.com/ipfs/go-cid"
logging "github.com/ipfs/go-log/v2"
"github.com/multiformats/go-multiaddr"
manet "github.com/multiformats/go-multiaddr/net"
promclient "github.com/prometheus/client_golang/prometheus"
"go.opencensus.io/tag"
"golang.org/x/xerrors"
"contrib.go.opencensus.io/exporter/prometheus"
"github.com/filecoin-project/go-jsonrpc"
"github.com/filecoin-project/go-jsonrpc/auth"
"github.com/filecoin-project/lotus/api"
"github.com/filecoin-project/lotus/api/apistruct"
"github.com/filecoin-project/lotus/metrics"
"github.com/filecoin-project/lotus/node"
"github.com/filecoin-project/lotus/node/impl"
)
var log = logging.Logger("main")
func serveRPC(a api.FullNode, stop node.StopFunc, addr multiaddr.Multiaddr, shutdownCh <-chan struct{}, maxRequestSize int64) error {
serverOptions := make([]jsonrpc.ServerOption, 0)
if maxRequestSize != 0 { // config set
serverOptions = append(serverOptions, jsonrpc.WithMaxRequestSize(maxRequestSize))
}
rpcServer := jsonrpc.NewServer(serverOptions...)
rpcServer.Register("Filecoin", apistruct.PermissionedFullAPI(metrics.MetricedFullAPI(a)))
ah := &auth.Handler{
Verify: a.AuthVerify,
Next: rpcServer.ServeHTTP,
}
http.Handle("/rpc/v0", ah)
importAH := &auth.Handler{
Verify: a.AuthVerify,
Next: handleImport(a.(*impl.FullNodeAPI)),
}
http.Handle("/rest/v0/import", importAH)
// Prometheus globals are exposed as interfaces, but the prometheus
// OpenCensus exporter expects a concrete *Registry. The concrete type of
// the globals are actually *Registry, so we downcast them, staying
// defensive in case things change under the hood.
registry, ok := promclient.DefaultRegisterer.(*promclient.Registry)
if !ok {
log.Warnf("failed to export default prometheus registry; some metrics will be unavailable; unexpected type: %T", promclient.DefaultRegisterer)
}
exporter, err := prometheus.NewExporter(prometheus.Options{
Registry: registry,
Namespace: "lotus",
})
if err != nil {
log.Fatalf("could not create the prometheus stats exporter: %v", err)
}
http.Handle("/debug/metrics", exporter)
http.Handle("/debug/pprof-set/block", handleFractionOpt("BlockProfileRate", runtime.SetBlockProfileRate))
http.Handle("/debug/pprof-set/mutex", handleFractionOpt("MutexProfileFraction",
func(x int) { runtime.SetMutexProfileFraction(x) },
))
lst, err := manet.Listen(addr)
if err != nil {
return xerrors.Errorf("could not listen: %w", err)
}
srv := &http.Server{
Handler: http.DefaultServeMux,
BaseContext: func(listener net.Listener) context.Context {
ctx, _ := tag.New(context.Background(), tag.Upsert(metrics.APIInterface, "lotus-daemon"))
return ctx
},
}
sigCh := make(chan os.Signal, 2)
shutdownDone := make(chan struct{})
go func() {
select {
case sig := <-sigCh:
log.Warnw("received shutdown", "signal", sig)
case <-shutdownCh:
log.Warn("received shutdown")
}
log.Warn("Shutting down...")
if err := srv.Shutdown(context.TODO()); err != nil {
log.Errorf("shutting down RPC server failed: %s", err)
}
if err := stop(context.TODO()); err != nil {
log.Errorf("graceful shutting down failed: %s", err)
}
log.Warn("Graceful shutdown successful")
_ = log.Sync() //nolint:errcheck
close(shutdownDone)
}()
signal.Notify(sigCh, syscall.SIGTERM, syscall.SIGINT)
err = srv.Serve(manet.NetListener(lst))
if err == http.ErrServerClosed {
<-shutdownDone
return nil
}
return err
}
func handleImport(a *impl.FullNodeAPI) func(w http.ResponseWriter, r *http.Request) {
return func(w http.ResponseWriter, r *http.Request) {
if r.Method != "PUT" {
w.WriteHeader(404)
return
}
if !auth.HasPerm(r.Context(), nil, apistruct.PermWrite) {
w.WriteHeader(401)
_ = json.NewEncoder(w).Encode(struct{ Error string }{"unauthorized: missing write permission"})
return
}
c, err := a.ClientImportLocal(r.Context(), r.Body)
if err != nil {
w.WriteHeader(500)
_ = json.NewEncoder(w).Encode(struct{ Error string }{err.Error()})
return
}
w.WriteHeader(200)
err = json.NewEncoder(w).Encode(struct{ Cid cid.Cid }{c})
if err != nil {
log.Errorf("/rest/v0/import: Writing response failed: %+v", err)
return
}
}
}