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Made maxBulkStringSize a command line option 'max-bulk-string-size'. It defaults to 32MB.

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This commit is contained in:
Sascha L. Teichmann 2015-03-14 19:01:00 +01:00
parent 05a95e4f7d
commit b029c473a8
3 changed files with 36 additions and 29 deletions
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18
cmd/mtredisalize/connection.go
View File

@ -21,16 +21,18 @@ var (
) )
type Connection struct { type Connection struct {
conn net.Conn conn net.Conn
session Session session Session
boolArray []bool maxBulkStringSize int64
boolArray []bool
} }
func NewConnection(conn net.Conn, session Session) *Connection { func NewConnection(conn net.Conn, session Session, maxBulkStringSize int64) *Connection {
return &Connection{ return &Connection{
conn: conn, conn: conn,
session: session, session: session,
boolArray: []bool{}} maxBulkStringSize: maxBulkStringSize,
boolArray: []bool{}}
} }
func (c *Connection) Run() { func (c *Connection) Run() {
@ -40,7 +42,7 @@ func (c *Connection) Run() {
}() }()
rce := NewRedisCommandExecutor(c) rce := NewRedisCommandExecutor(c)
r := bufio.NewReaderSize(c.conn, 8*1024) r := bufio.NewReaderSize(c.conn, 8*1024)
parser := NewRedisParser(r, rce) parser := NewRedisParser(r, rce, c.maxBulkStringSize)
parser.Parse() parser.Parse()
log.Println("client disconnected") log.Println("client disconnected")
} }

30
cmd/mtredisalize/main.go
View File

@ -16,9 +16,10 @@ import (
) )
const ( const (
Version = "0.3" defaultMaxBulkStringSize = 32 * 1024 * 1024
GCDuration = "24h" Version = "0.3"
ChangeDuration = "30s" GCDuration = "24h"
ChangeDuration = "30s"
) )
func usage() { func usage() {
@ -31,15 +32,16 @@ func usage() {
func main() { func main() {
var ( var (
port int port int
host string host string
driver string driver string
cacheSize int cacheSize int
version bool version bool
interleaved bool interleaved bool
changeUrl string changeUrl string
gcDuration string gcDuration string
changeDuration string changeDuration string
maxBulkStringSize int64
) )
flag.Usage = usage flag.Usage = usage
@ -56,6 +58,8 @@ func main() {
flag.StringVar(&changeDuration, flag.StringVar(&changeDuration,
"change-duration", ChangeDuration, "Duration to aggregate changes.") "change-duration", ChangeDuration, "Duration to aggregate changes.")
flag.StringVar(&changeUrl, "change-url", "", "URL to send changes to.") flag.StringVar(&changeUrl, "change-url", "", "URL to send changes to.")
flag.Int64Var(&maxBulkStringSize, "max-bulk-string-size", defaultMaxBulkStringSize,
"max size of a bulk string to be accepted as input (in bytes).")
flag.Parse() flag.Parse()
if version { if version {
@ -147,7 +151,7 @@ func main() {
log.Printf("Cannot create session: %s", err) log.Printf("Cannot create session: %s", err)
conn.Close() conn.Close()
} else { } else {
go NewConnection(conn, session).Run() go NewConnection(conn, session, maxBulkStringSize).Run()
} }
case <-sigChan: case <-sigChan:
log.Println("Shutting down") log.Println("Shutting down")

17
cmd/mtredisalize/parser.go
View File

@ -13,8 +13,6 @@ import (
"strconv" "strconv"
) )
const maxBulkStringSize = 8 * 1024 * 1024
type RedisConsumer interface { type RedisConsumer interface {
ConsumeInteger(int64) bool ConsumeInteger(int64) bool
ConsumeArray(int64) bool ConsumeArray(int64) bool
@ -24,14 +22,17 @@ type RedisConsumer interface {
} }
type RedisParser struct { type RedisParser struct {
reader *bufio.Reader reader *bufio.Reader
consumer RedisConsumer consumer RedisConsumer
maxBulkStringSize int64
} }
func NewRedisParser(reader *bufio.Reader, consumer RedisConsumer) *RedisParser { func NewRedisParser(reader *bufio.Reader, consumer RedisConsumer,
maxBulkStringSize int64) *RedisParser {
return &RedisParser{ return &RedisParser{
reader: reader, reader: reader,
consumer: consumer} consumer: consumer,
maxBulkStringSize: maxBulkStringSize}
} }
func (rp *RedisParser) Parse() { func (rp *RedisParser) Parse() {
@ -94,7 +95,7 @@ func (rp *RedisParser) bulkString(line []byte) bool {
case i == 0: case i == 0:
return rp.consumer.ConsumeBulkString([]byte{}) return rp.consumer.ConsumeBulkString([]byte{})
default: default:
if i > maxBulkStringSize { // prevent denial of service. if i > rp.maxBulkStringSize { // prevent denial of service.
return rp.consumer.ConsumeError( return rp.consumer.ConsumeError(
fmt.Errorf("Bulk string too large (%d bytes).\n", i)) fmt.Errorf("Bulk string too large (%d bytes).\n", i))
} }