// jsonRPCRead is the RPC wrapper around the jsonRead function to handle reading
// and responding to RPC messages.
func jsonRPCRead(w http.ResponseWriter, r *http.Request, s *rpcServer) {
if atomic.LoadInt32(&s.shutdown) != 0 {
return
}
body, err := btcjson.GetRaw(r.Body)
if err != nil {
rpcsLog.Errorf("Error getting json message: %v", err)
return
}
var reply btcjson.Reply
cmd, jsonErr := parseCmd(body)
if cmd != nil {
// Unmarshaling at least a valid JSON-RPC message succeeded.
// Use the provided id for errors.
id := cmd.Id()
reply.Id = &id
}
if jsonErr != nil {
reply.Error = jsonErr
} else {
reply = standardCmdReply(cmd, s)
}
rpcsLog.Tracef("reply: %v", reply)
msg, err := btcjson.MarshallAndSend(reply, w)
if err != nil {
rpcsLog.Errorf(msg)
return
}
rpcsLog.Debugf(msg)
}
// jsonRPCRead is the RPC wrapper around the jsonRead function to handles
// reading and responding to RPC messages.
func jsonRPCRead(w http.ResponseWriter, r *http.Request, s *rpcServer) {
r.Close = true
if atomic.LoadInt32(&s.shutdown) != 0 {
return
}
body, err := btcjson.GetRaw(r.Body)
if err != nil {
log.Errorf("RPCS: Error getting json message: %v", err)
return
}
// Error is intentionally ignored here. It's used in in the
// websocket handler to tell when a method is not supported by
// the standard RPC API, and is not needed here. Error logging
// is done inside jsonRead, so no need to log the error here.
reply, _ := jsonRead(body, s, nil)
log.Tracef("[RPCS] reply: %v", reply)
msg, err := btcjson.MarshallAndSend(reply, w)
if err != nil {
log.Errorf(msg)
return
}
log.Debugf(msg)
}
// TestMarshallAndSend tests the MarshallAndSend function to make sure it can
// create a json message to write to the io.Writerr and to make sure
// it fails properly in cases where it cannot generate json.
func TestMarshallAndSend(t *testing.T) {
jsonError := btcjson.Error{
Code: -32700,
Message: "Parse error",
}
// json.Marshal cannot handle channels so this is a good way to get a
// marshal failure.
badRes := make(chan interface{})
rawReply := btcjson.Reply{
Result: badRes,
Error: &jsonError,
Id: nil,
}
var w bytes.Buffer
msg, err := btcjson.MarshallAndSend(rawReply, &w)
if fmt.Sprintf("%s", err) != "json: unsupported type: chan interface {}" {
t.Error("Should not be able to unmarshall channel")
}
// Use something simple so we can compare the reply.
rawReply = btcjson.Reply{
Result: nil,
Error: nil,
Id: nil,
}
msg, err = btcjson.MarshallAndSend(rawReply, &w)
if msg != "[RPCS] reply: {<nil> <nil> <nil>}" {
t.Error("Incorrect reply:", msg)
}
expBuf := "{\"result\":null,\"error\":null,\"id\":null}\n"
if w.String() != expBuf {
t.Error("Incorrect data in buffer:", w.String())
}
return
}
// jsonRPCRead is the main function that handles reading messages, getting
// the data the message requests, and writing the reply.
func jsonRPCRead(w http.ResponseWriter, r *http.Request, s *rpcServer) {
_ = spew.Dump
r.Close = true
if atomic.LoadInt32(&s.shutdown) != 0 {
return
}
var rawReply btcjson.Reply
body, err := btcjson.GetRaw(r.Body)
if err != nil {
log.Errorf("[RPCS] Error getting json message: %v", err)
return
}
var message btcjson.Message
err = json.Unmarshal(body, &message)
if err != nil {
log.Errorf("[RPCS] Error unmarshalling json message: %v", err)
jsonError := btcjson.Error{
Code: -32700,
Message: "Parse error",
}
rawReply = btcjson.Reply{
Result: nil,
Error: &jsonError,
Id: nil,
}
log.Tracef("[RPCS] reply: %v", rawReply)
msg, err := btcjson.MarshallAndSend(rawReply, w)
if err != nil {
log.Errorf(msg)
return
}
log.Debugf(msg)
return
}
log.Tracef("[RPCS] received: %v", message)
// Deal with commands
switch message.Method {
case "stop":
rawReply = btcjson.Reply{
Result: "btcd stopping.",
Error: nil,
Id: &message.Id,
}
s.server.Stop()
case "getblockcount":
_, maxidx, _ := s.server.db.NewestSha()
rawReply = btcjson.Reply{
Result: maxidx,
Error: nil,
Id: &message.Id,
}
// btcd does not do mining so we can hardcode replies here.
case "getgenerate":
rawReply = btcjson.Reply{
Result: false,
Error: nil,
Id: &message.Id,
}
case "setgenerate":
rawReply = btcjson.Reply{
Result: nil,
Error: nil,
Id: &message.Id,
}
case "gethashespersec":
rawReply = btcjson.Reply{
Result: 0,
Error: nil,
Id: &message.Id,
}
case "getblockhash":
var f interface{}
err = json.Unmarshal(body, &f)
m := f.(map[string]interface{})
var idx float64
for _, v := range m {
switch vv := v.(type) {
case []interface{}:
for _, u := range vv {
idx, _ = u.(float64)
}
default:
}
}
sha, err := s.server.db.FetchBlockShaByHeight(int64(idx))
if err != nil {
log.Errorf("[RCPS] Error getting block: %v", err)
jsonError := btcjson.Error{
Code: -1,
Message: "Block number out of range.",
}
rawReply = btcjson.Reply{
Result: nil,
Error: &jsonError,
Id: &message.Id,
}
log.Tracef("[RPCS] reply: %v", rawReply)
break
}
rawReply = btcjson.Reply{
Result: sha.String(),
Error: nil,
Id: &message.Id,
}
case "getblock":
var f interface{}
err = json.Unmarshal(body, &f)
m := f.(map[string]interface{})
var hash string
for _, v := range m {
switch vv := v.(type) {
case []interface{}:
for _, u := range vv {
hash, _ = u.(string)
}
default:
}
}
sha, err := btcwire.NewShaHashFromStr(hash)
if err != nil {
log.Errorf("[RPCS] Error generating sha: %v", err)
jsonError := btcjson.Error{
Code: -5,
Message: "Block not found",
}
rawReply = btcjson.Reply{
Result: nil,
Error: &jsonError,
Id: &message.Id,
}
log.Tracef("[RPCS] reply: %v", rawReply)
break
}
blk, err := s.server.db.FetchBlockBySha(sha)
if err != nil {
log.Errorf("[RPCS] Error fetching sha: %v", err)
jsonError := btcjson.Error{
Code: -5,
Message: "Block not found",
}
rawReply = btcjson.Reply{
Result: nil,
Error: &jsonError,
Id: &message.Id,
}
log.Tracef("[RPCS] reply: %v", rawReply)
break
}
idx := blk.Height()
buf, err := blk.Bytes()
if err != nil {
log.Errorf("[RPCS] Error fetching block: %v", err)
jsonError := btcjson.Error{
Code: -5,
Message: "Block not found",
}
rawReply = btcjson.Reply{
Result: nil,
Error: &jsonError,
Id: &message.Id,
}
log.Tracef("[RPCS] reply: %v", rawReply)
break
}
txList, _ := blk.TxShas()
txNames := make([]string, len(txList))
for i, v := range txList {
txNames[i] = v.String()
}
_, maxidx, err := s.server.db.NewestSha()
if err != nil {
log.Errorf("[RPCS] Cannot get newest sha: %v", err)
return
}
blockHeader := &blk.MsgBlock().Header
blockReply := btcjson.BlockResult{
Hash: hash,
Version: blockHeader.Version,
MerkleRoot: blockHeader.MerkleRoot.String(),
PreviousHash: blockHeader.PrevBlock.String(),
Nonce: blockHeader.Nonce,
Time: blockHeader.Timestamp.Unix(),
Confirmations: uint64(1 + maxidx - idx),
Height: idx,
Tx: txNames,
Size: len(buf),
Bits: strconv.FormatInt(int64(blockHeader.Bits), 16),
Difficulty: getDifficultyRatio(blockHeader.Bits),
}
// Get next block unless we are already at the top.
if idx < maxidx {
shaNext, err := s.server.db.FetchBlockShaByHeight(int64(idx + 1))
if err != nil {
log.Errorf("[RPCS] No next block: %v", err)
} else {
blockReply.NextHash = shaNext.String()
}
}
rawReply = btcjson.Reply{
Result: blockReply,
Error: nil,
Id: &message.Id,
}
case "getrawtransaction":
var f interface{}
err = json.Unmarshal(body, &f)
m := f.(map[string]interface{})
var tx string
var verbose float64
for _, v := range m {
switch vv := v.(type) {
case []interface{}:
for _, u := range vv {
switch uu := u.(type) {
case string:
tx = uu
case float64:
verbose = uu
default:
}
}
default:
}
}
if int(verbose) != 1 {
// Don't return details
// not used yet
} else {
txSha, _ := btcwire.NewShaHashFromStr(tx)
var txS *btcwire.MsgTx
txList, err := s.server.db.FetchTxBySha(txSha)
if err != nil {
log.Errorf("[RPCS] Error fetching tx: %v", err)
jsonError := btcjson.Error{
Code: -5,
Message: "No information available about transaction",
}
rawReply = btcjson.Reply{
Result: nil,
Error: &jsonError,
Id: &message.Id,
}
log.Tracef("[RPCS] reply: %v", rawReply)
break
}
lastTx := len(txList) - 1
txS = txList[lastTx].Tx
blksha := txList[lastTx].BlkSha
blk, err := s.server.db.FetchBlockBySha(blksha)
if err != nil {
log.Errorf("[RPCS] Error fetching sha: %v", err)
jsonError := btcjson.Error{
Code: -5,
Message: "Block not found",
}
rawReply = btcjson.Reply{
Result: nil,
Error: &jsonError,
Id: &message.Id,
}
log.Tracef("[RPCS] reply: %v", rawReply)
break
}
idx := blk.Height()
txOutList := txS.TxOut
voutList := make([]btcjson.Vout, len(txOutList))
txInList := txS.TxIn
vinList := make([]btcjson.Vin, len(txInList))
for i, v := range txInList {
vinList[i].Sequence = float64(v.Sequence)
disbuf, _ := btcscript.DisasmString(v.SignatureScript)
vinList[i].ScriptSig.Asm = strings.Replace(disbuf, " ", "", -1)
vinList[i].Vout = i + 1
log.Debugf(disbuf)
}
for i, v := range txOutList {
voutList[i].N = i
voutList[i].Value = float64(v.Value) / 100000000
isbuf, _ := btcscript.DisasmString(v.PkScript)
voutList[i].ScriptPubKey.Asm = isbuf
voutList[i].ScriptPubKey.ReqSig = strings.Count(isbuf, "OP_CHECKSIG")
_, addr, err := btcscript.ScriptToAddress(v.PkScript)
if err != nil {
log.Errorf("[RPCS] Error getting address for %v: %v", txSha, err)
} else {
addrList := make([]string, 1)
addrList[0] = addr
voutList[i].ScriptPubKey.Addresses = addrList
}
}
_, maxidx, err := s.server.db.NewestSha()
if err != nil {
log.Errorf("[RPCS] Cannot get newest sha: %v", err)
return
}
confirmations := uint64(1 + maxidx - idx)
blockHeader := &blk.MsgBlock().Header
txReply := btcjson.TxRawResult{
Txid: tx,
Vout: voutList,
Vin: vinList,
Version: txS.Version,
LockTime: txS.LockTime,
// This is not a typo, they are identical in
// bitcoind as well.
Time: blockHeader.Timestamp.Unix(),
Blocktime: blockHeader.Timestamp.Unix(),
BlockHash: blksha.String(),
Confirmations: confirmations,
}
rawReply = btcjson.Reply{
Result: txReply,
Error: nil,
Id: &message.Id,
}
}
case "decoderawtransaction":
var f interface{}
err = json.Unmarshal(body, &f)
m := f.(map[string]interface{})
var hash string
for _, v := range m {
switch vv := v.(type) {
case []interface{}:
for _, u := range vv {
hash, _ = u.(string)
}
default:
}
}
spew.Dump(hash)
txReply := btcjson.TxRawDecodeResult{}
rawReply = btcjson.Reply{
Result: txReply,
Error: nil,
Id: &message.Id,
}
default:
jsonError := btcjson.Error{
Code: -32601,
Message: "Method not found",
}
rawReply = btcjson.Reply{
Result: nil,
Error: &jsonError,
Id: &message.Id,
}
}
msg, err := btcjson.MarshallAndSend(rawReply, w)
if err != nil {
log.Errorf(msg)
return
}
log.Debugf(msg)
return
}