LBRYCommunity/lbry.go
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peek at raw bencoded data to avoid extra decode

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This commit is contained in:
Alex Grintsvayg 2018-04-03 14:14:59 -04:00
parent 5bb275afaa
commit 035be0893d
1 changed files with 19 additions and 20 deletions
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39
dht/rpc.go
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@ -6,6 +6,8 @@ import (
"strings"
"time"
"github.com/lbryio/lbry.go/util"
"github.com/davecgh/go-spew/spew"
"github.com/lyoshenka/bencode"
log "github.com/sirupsen/logrus"
@ -15,52 +17,49 @@ import (
func handlePacket(dht *DHT, pkt packet) {
//log.Debugf("[%s] Received message from %s:%s (%d bytes) %s", dht.node.id.HexShort(), pkt.raddr.IP.String(), strconv.Itoa(pkt.raddr.Port), len(pkt.data), hex.EncodeToString(pkt.data))
var data map[string]interface{}
err := bencode.DecodeBytes(pkt.data, &data)
if err != nil {
log.Errorf("[%s] error decoding data: %s: (%d bytes) %s", dht.node.id.HexShort(), err.Error(), len(pkt.data), hex.EncodeToString(pkt.data))
if !util.InSlice(string(pkt.data[0:5]), []string{"d1:0i", "di0ei"}) {
log.Errorf("[%s] data is not a well-formatted dict: (%d bytes) %s", dht.node.id.HexShort(), len(pkt.data), hex.EncodeToString(pkt.data))
return
}
msgType, ok := data[headerTypeField]
if !ok {
log.Errorf("[%s] decoded data has no message type: %s", dht.node.id.HexShort(), spew.Sdump(data))
return
}
// TODO: test this stuff more thoroughly
switch msgType.(int64) {
case requestType:
// the following is a bit of a hack, but it lets us avoid decoding every message twice
// it depends on the data being a dict with 0 as the first key (so it starts with "d1:0i") and the message type as the first value
switch pkt.data[5] {
case '0' + requestType:
request := Request{}
err = bencode.DecodeBytes(pkt.data, &request)
err := bencode.DecodeBytes(pkt.data, &request)
if err != nil {
log.Errorln(err)
log.Errorf("[%s] error decoding request: %s: (%d bytes) %s", dht.node.id.HexShort(), err.Error(), len(pkt.data), hex.EncodeToString(pkt.data))
return
}
log.Debugf("[%s] query %s: received request from %s: %s(%s)", dht.node.id.HexShort(), request.ID.HexShort(), request.NodeID.HexShort(), request.Method, argsToString(request.Args))
handleRequest(dht, pkt.raddr, request)
case responseType:
case '0' + responseType:
response := Response{}
err = bencode.DecodeBytes(pkt.data, &response)
err := bencode.DecodeBytes(pkt.data, &response)
if err != nil {
log.Errorln(err)
log.Errorf("[%s] error decoding response: %s: (%d bytes) %s", dht.node.id.HexShort(), err.Error(), len(pkt.data), hex.EncodeToString(pkt.data))
return
}
log.Debugf("[%s] query %s: received response from %s: %s", dht.node.id.HexShort(), response.ID.HexShort(), response.NodeID.HexShort(), response.ArgsDebug())
handleResponse(dht, pkt.raddr, response)
case errorType:
case '0' + errorType:
e := Error{}
err = bencode.DecodeBytes(pkt.data, &e)
err := bencode.DecodeBytes(pkt.data, &e)
if err != nil {
log.Errorln(err)
log.Errorf("[%s] error decoding error: %s: (%d bytes) %s", dht.node.id.HexShort(), err.Error(), len(pkt.data), hex.EncodeToString(pkt.data))
return
}
log.Debugf("[%s] query %s: received error from %s: %s", dht.node.id.HexShort(), e.ID.HexShort(), e.NodeID.HexShort(), e.ExceptionType)
handleError(dht, pkt.raddr, e)
default:
log.Errorf("[%s] invalid message type: %s", dht.node.id.HexShort(), msgType)
log.Errorf("[%s] invalid message type: %s", dht.node.id.HexShort(), pkt.data[5])
return
}
}