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// Copyright (C) 2019-2024 Algorand, Inc.
// This file is part of go-algorand
//
// go-algorand is free software: you can redistribute it and/or modify
// it under the terms of the GNU Affero General Public License as
// published by the Free Software Foundation, either version 3 of the
// License, or (at your option) any later version.
//
// go-algorand is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU Affero General Public License for more details.
//
// You should have received a copy of the GNU Affero General Public License
// along with go-algorand. If not, see <https://www.gnu.org/licenses/>.
package main
import (
"encoding/base64"
"flag"
"fmt"
"math/rand"
"net/http"
"os"
"path"
"strconv"
"github.com/algorand/websocket"
"github.com/gorilla/mux"
"github.com/algorand/go-algorand/crypto"
"github.com/algorand/go-algorand/logging"
"github.com/algorand/go-algorand/network"
"github.com/algorand/go-algorand/rpcs"
)
var addrFlag = flag.String("addr", "127.0.0.1:4160", "Address to listen on")
var dirFlag = flag.String("dir", "", "Directory containing catchup blocks")
var tarDirFlag = flag.String("tardir", "", "Directory containing catchup blocks in M_N.tar.bz2")
func main() {
flag.Parse()
log := logging.Base()
log.SetLevel(logging.Info)
if *dirFlag == "" && *tarDirFlag == "" {
panic("Must specify -dir or -tardir")
}
var blocktars *tarBlockSet
if *tarDirFlag != "" {
var err error
blocktars, err = openTarBlockDir(*tarDirFlag)
if err != nil {
fmt.Fprintf(os.Stderr, "%s: error opening block tar dir, %v\n", *tarDirFlag, err)
os.Exit(1)
}
}
if *downloadFlag {
download()
return
}
var srv http.Server
r := mux.NewRouter()
srv.Handler = r
srv.Addr = *addrFlag
var upgrader = websocket.Upgrader{
ReadBufferSize: 1024,
WriteBufferSize: 1024,
}
r.HandleFunc(network.GossipNetworkPath, func(w http.ResponseWriter, r *http.Request) {
pathVars := mux.Vars(r)
genesisID := pathVars["genesisID"]
var rnd [10]byte
crypto.RandBytes(rnd[:])
requestHeader := make(http.Header)
requestHeader.Set(network.GenesisHeader, genesisID)
requestHeader.Set(network.NodeRandomHeader, base64.StdEncoding.EncodeToString(rnd[:]))
requestHeader.Set(network.ProtocolVersionHeader, "2.1")
conn, err := upgrader.Upgrade(w, r, requestHeader)
if err != nil {
return
}
go func() {
for {
_, _, err := conn.ReadMessage()
if err != nil {
break
}
}
}()
})
r.HandleFunc(rpcs.BlockServiceBlockPath, func(w http.ResponseWriter, r *http.Request) {
pathVars := mux.Vars(r)
versionStr := pathVars["version"]
roundStr := pathVars["round"]
genesisID := pathVars["genesisID"]
roundNumber, err := stringToBlock(roundStr)
if err != nil {
log.Infof("%s %s: %v", r.Method, r.URL, err)
http.NotFound(w, r)
return
}
var data []byte
if *dirFlag != "" {
blkPath := blockToPath(roundNumber)
data, err = os.ReadFile(
path.Join(
*dirFlag,
"v"+versionStr,
genesisID,
"block",
blkPath,
),
)
} else if blocktars != nil {
data, err = blocktars.getBlock(roundNumber)
} else {
fmt.Fprintf(os.Stderr, "config err, no block dir and no block tar dir\n")
defer os.Exit(1)
w.WriteHeader(http.StatusInternalServerError)
return
}
if err != nil {
log.Infof("%s %s: %v", r.Method, r.URL, err)
http.NotFound(w, r)
return
}
w.Header().Set("Content-Type", "application/x-algorand-block-v1")
w.Header().Set("Content-Length", strconv.Itoa(len(data)))
w.WriteHeader(http.StatusOK)
w.Write(data)
if rand.Intn(20) == 0 {
log.Infof("OK %d", roundNumber)
}
})
log.Infof("serving %s", srv.Addr)
err := srv.ListenAndServe()
if err != nil {
panic(err)
}
}
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