You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
125 lines
3.2 KiB
125 lines
3.2 KiB
package proxy
|
|
|
|
import (
|
|
"context"
|
|
"fmt"
|
|
"net"
|
|
"net/http"
|
|
|
|
tmpubsub "github.com/tendermint/tendermint/internal/pubsub"
|
|
rpccore "github.com/tendermint/tendermint/internal/rpc/core"
|
|
"github.com/tendermint/tendermint/libs/log"
|
|
"github.com/tendermint/tendermint/light"
|
|
lrpc "github.com/tendermint/tendermint/light/rpc"
|
|
rpchttp "github.com/tendermint/tendermint/rpc/client/http"
|
|
rpcserver "github.com/tendermint/tendermint/rpc/jsonrpc/server"
|
|
)
|
|
|
|
// A Proxy defines parameters for running an HTTP server proxy.
|
|
type Proxy struct {
|
|
Addr string // TCP address to listen on, ":http" if empty
|
|
Config *rpcserver.Config
|
|
Client *lrpc.Client
|
|
Logger log.Logger
|
|
Listener net.Listener
|
|
}
|
|
|
|
// NewProxy creates the struct used to run an HTTP server for serving light
|
|
// client rpc requests.
|
|
func NewProxy(
|
|
lightClient *light.Client,
|
|
listenAddr, providerAddr string,
|
|
config *rpcserver.Config,
|
|
logger log.Logger,
|
|
opts ...lrpc.Option,
|
|
) (*Proxy, error) {
|
|
rpcClient, err := rpchttp.NewWithTimeout(providerAddr, config.WriteTimeout)
|
|
if err != nil {
|
|
return nil, fmt.Errorf("failed to create http client for %s: %w", providerAddr, err)
|
|
}
|
|
|
|
return &Proxy{
|
|
Addr: listenAddr,
|
|
Config: config,
|
|
Client: lrpc.NewClient(logger, rpcClient, lightClient, opts...),
|
|
Logger: logger,
|
|
}, nil
|
|
}
|
|
|
|
// ListenAndServe configures the rpcserver.WebsocketManager, sets up the RPC
|
|
// routes to proxy via Client, and starts up an HTTP server on the TCP network
|
|
// address p.Addr.
|
|
// See http#Server#ListenAndServe.
|
|
func (p *Proxy) ListenAndServe(ctx context.Context) error {
|
|
listener, mux, err := p.listen(ctx)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
p.Listener = listener
|
|
|
|
return rpcserver.Serve(
|
|
ctx,
|
|
listener,
|
|
mux,
|
|
p.Logger,
|
|
p.Config,
|
|
)
|
|
}
|
|
|
|
// ListenAndServeTLS acts identically to ListenAndServe, except that it expects
|
|
// HTTPS connections.
|
|
// See http#Server#ListenAndServeTLS.
|
|
func (p *Proxy) ListenAndServeTLS(ctx context.Context, certFile, keyFile string) error {
|
|
listener, mux, err := p.listen(ctx)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
p.Listener = listener
|
|
|
|
return rpcserver.ServeTLS(
|
|
ctx,
|
|
listener,
|
|
mux,
|
|
certFile,
|
|
keyFile,
|
|
p.Logger,
|
|
p.Config,
|
|
)
|
|
}
|
|
|
|
func (p *Proxy) listen(ctx context.Context) (net.Listener, *http.ServeMux, error) {
|
|
mux := http.NewServeMux()
|
|
|
|
// 1) Register regular routes.
|
|
r := rpccore.NewRoutesMap(proxyService{Client: p.Client}, nil)
|
|
rpcserver.RegisterRPCFuncs(mux, r, p.Logger)
|
|
|
|
// 2) Allow websocket connections.
|
|
wmLogger := p.Logger.With("protocol", "websocket")
|
|
wm := rpcserver.NewWebsocketManager(wmLogger, r,
|
|
rpcserver.OnDisconnect(func(remoteAddr string) {
|
|
err := p.Client.UnsubscribeAll(context.Background(), remoteAddr)
|
|
if err != nil && err != tmpubsub.ErrSubscriptionNotFound {
|
|
wmLogger.Error("Failed to unsubscribe addr from events", "addr", remoteAddr, "err", err)
|
|
}
|
|
}),
|
|
rpcserver.ReadLimit(p.Config.MaxBodyBytes),
|
|
)
|
|
|
|
mux.HandleFunc("/websocket", wm.WebsocketHandler)
|
|
|
|
// 3) Start a client.
|
|
if !p.Client.IsRunning() {
|
|
if err := p.Client.Start(ctx); err != nil {
|
|
return nil, mux, fmt.Errorf("can't start client: %w", err)
|
|
}
|
|
}
|
|
|
|
// 4) Start listening for new connections.
|
|
listener, err := rpcserver.Listen(p.Addr, p.Config.MaxOpenConnections)
|
|
if err != nil {
|
|
return nil, mux, err
|
|
}
|
|
|
|
return listener, mux, nil
|
|
}
|