Merge branch 'develop'

This commit is contained in:
siddontang 2015-04-07 08:27:23 +08:00
commit 3de5555b5e
9 changed files with 561 additions and 465 deletions

6
Godeps/Godeps.json generated
View File

@ -22,10 +22,6 @@
"ImportPath": "github.com/edsrzf/mmap-go",
"Rev": "6c75090c55983bef2e129e173681b20d24871ef8"
},
{
"ImportPath": "github.com/siddontang/go/arena",
"Rev": "c2b33271306fcb7c6532efceac33ec45ee2439e0"
},
{
"ImportPath": "github.com/siddontang/go/bson",
"Rev": "c2b33271306fcb7c6532efceac33ec45ee2439e0"
@ -60,7 +56,7 @@
},
{
"ImportPath": "github.com/siddontang/goredis",
"Rev": "ca4c5d7500bcc6850c52824caf2c49a6015c8a03"
"Rev": "802ef3bdd5f642335f9ed132e024e5e2fd3d03ce"
},
{
"ImportPath": "github.com/siddontang/rdb",

View File

@ -1,30 +0,0 @@
package arena
type Arena struct {
buf []byte
offset int
}
func NewArena(size int) *Arena {
a := new(Arena)
a.buf = make([]byte, size, size)
a.offset = 0
return a
}
func (a *Arena) Make(size int) []byte {
if len(a.buf) < size || len(a.buf)-a.offset < size {
return make([]byte, size)
}
b := a.buf[a.offset : size+a.offset]
a.offset += size
return b
}
func (a *Arena) Reset() {
a.offset = 0
}

View File

@ -1,28 +0,0 @@
package arena
import (
"fmt"
"testing"
)
func TestArena(t *testing.T) {
a := NewArena(100)
for i := 0; i < 50; i++ {
a.buf[i] = 1
}
for i := 50; i < 100; i++ {
a.buf[i] = 2
}
b1 := a.Make(50)
b2 := a.Make(30)
b3 := a.Make(40)
fmt.Printf("%p %d\n", b1, b1[49])
fmt.Printf("%p %d\n", b2, b2[29])
fmt.Printf("%p %d\n", b3, b3[39])
}

View File

@ -21,6 +21,11 @@ func (c *PoolConn) Close() {
c.c.put(c.Conn)
}
// force close inner connection and not put it into pool
func (c *PoolConn) Finalize() {
c.Conn.Close()
}
type Client struct {
sync.Mutex

View File

@ -2,21 +2,12 @@ package goredis
import (
"bufio"
"bytes"
"errors"
"fmt"
"io"
"net"
"strconv"
"sync/atomic"
"time"
)
// Error represents an error returned in a command reply.
type Error string
func (err Error) Error() string { return string(err) }
type sizeWriter int64
func (s *sizeWriter) Write(p []byte) (int, error) {
@ -29,12 +20,8 @@ type Conn struct {
br *bufio.Reader
bw *bufio.Writer
// Scratch space for formatting argument length.
// '*' or '$', length, "\r\n"
lenScratch [32]byte
// Scratch space for formatting integers and floats.
numScratch [40]byte
respReader *RespReader
respWriter *RespWriter
totalReadSize sizeWriter
totalWriteSize sizeWriter
@ -58,6 +45,9 @@ func ConnectWithSize(addr string, readSize int, writeSize int) (*Conn, error) {
c.br = bufio.NewReaderSize(io.TeeReader(c.c, &c.totalReadSize), readSize)
c.bw = bufio.NewWriterSize(io.MultiWriter(c.c, &c.totalWriteSize), writeSize)
c.respReader = NewRespReader(c.br)
c.respWriter = NewRespWriter(c.bw)
atomic.StoreInt32(&c.closed, 0)
return c, nil
@ -102,20 +92,16 @@ func (c *Conn) Do(cmd string, args ...interface{}) (interface{}, error) {
}
func (c *Conn) Send(cmd string, args ...interface{}) error {
if err := c.writeCommand(cmd, args); err != nil {
if err := c.respWriter.WriteCommand(cmd, args...); err != nil {
c.Close()
return err
}
if err := c.bw.Flush(); err != nil {
c.Close()
return err
}
return nil
}
func (c *Conn) Receive() (interface{}, error) {
if reply, err := c.readReply(); err != nil {
if reply, err := c.respReader.Parse(); err != nil {
c.Close()
return nil, err
} else {
@ -128,7 +114,7 @@ func (c *Conn) Receive() (interface{}, error) {
}
func (c *Conn) ReceiveBulkTo(w io.Writer) error {
err := c.readBulkReplyTo(w)
err := c.respReader.ParseBulkTo(w)
if err != nil {
if _, ok := err.(Error); !ok {
c.Close()
@ -137,245 +123,6 @@ func (c *Conn) ReceiveBulkTo(w io.Writer) error {
return err
}
func (c *Conn) writeLen(prefix byte, n int) error {
c.lenScratch[len(c.lenScratch)-1] = '\n'
c.lenScratch[len(c.lenScratch)-2] = '\r'
i := len(c.lenScratch) - 3
for {
c.lenScratch[i] = byte('0' + n%10)
i -= 1
n = n / 10
if n == 0 {
break
}
}
c.lenScratch[i] = prefix
_, err := c.bw.Write(c.lenScratch[i:])
return err
}
func (c *Conn) writeString(s string) error {
c.writeLen('$', len(s))
c.bw.WriteString(s)
_, err := c.bw.WriteString("\r\n")
return err
}
func (c *Conn) writeBytes(p []byte) error {
c.writeLen('$', len(p))
c.bw.Write(p)
_, err := c.bw.WriteString("\r\n")
return err
}
func (c *Conn) writeInt64(n int64) error {
return c.writeBytes(strconv.AppendInt(c.numScratch[:0], n, 10))
}
func (c *Conn) writeFloat64(n float64) error {
return c.writeBytes(strconv.AppendFloat(c.numScratch[:0], n, 'g', -1, 64))
}
func (c *Conn) writeCommand(cmd string, args []interface{}) (err error) {
c.writeLen('*', 1+len(args))
err = c.writeString(cmd)
for _, arg := range args {
if err != nil {
break
}
switch arg := arg.(type) {
case string:
err = c.writeString(arg)
case []byte:
err = c.writeBytes(arg)
case int:
err = c.writeInt64(int64(arg))
case int64:
err = c.writeInt64(arg)
case float64:
err = c.writeFloat64(arg)
case bool:
if arg {
err = c.writeString("1")
} else {
err = c.writeString("0")
}
case nil:
err = c.writeString("")
default:
var buf bytes.Buffer
fmt.Fprint(&buf, arg)
err = c.writeBytes(buf.Bytes())
}
}
return err
}
func (c *Conn) readLine() ([]byte, error) {
p, err := c.br.ReadSlice('\n')
if err == bufio.ErrBufferFull {
return nil, errors.New("long response line")
}
if err != nil {
return nil, err
}
i := len(p) - 2
if i < 0 || p[i] != '\r' {
return nil, errors.New("bad response line terminator")
}
return p[:i], nil
}
// parseLen parses bulk string and array lengths.
func parseLen(p []byte) (int, error) {
if len(p) == 0 {
return -1, errors.New("malformed length")
}
if p[0] == '-' && len(p) == 2 && p[1] == '1' {
// handle $-1 and $-1 null replies.
return -1, nil
}
var n int
for _, b := range p {
n *= 10
if b < '0' || b > '9' {
return -1, errors.New("illegal bytes in length")
}
n += int(b - '0')
}
return n, nil
}
// parseInt parses an integer reply.
func parseInt(p []byte) (interface{}, error) {
if len(p) == 0 {
return 0, errors.New("malformed integer")
}
var negate bool
if p[0] == '-' {
negate = true
p = p[1:]
if len(p) == 0 {
return 0, errors.New("malformed integer")
}
}
var n int64
for _, b := range p {
n *= 10
if b < '0' || b > '9' {
return 0, errors.New("illegal bytes in length")
}
n += int64(b - '0')
}
if negate {
n = -n
}
return n, nil
}
var (
okReply interface{} = "OK"
pongReply interface{} = "PONG"
)
func (c *Conn) readBulkReplyTo(w io.Writer) error {
line, err := c.readLine()
if err != nil {
return err
}
if len(line) == 0 {
return errors.New("ledis: short response line")
}
switch line[0] {
case '-':
return Error(string(line[1:]))
case '$':
n, err := parseLen(line[1:])
if n < 0 || err != nil {
return err
}
var nn int64
if nn, err = io.CopyN(w, c.br, int64(n)); err != nil {
return err
} else if nn != int64(n) {
return io.ErrShortWrite
}
if line, err := c.readLine(); err != nil {
return err
} else if len(line) != 0 {
return errors.New("bad bulk string format")
}
return nil
default:
return fmt.Errorf("not invalid bulk string type, but %c", line[0])
}
}
func (c *Conn) readReply() (interface{}, error) {
line, err := c.readLine()
if err != nil {
return nil, err
}
if len(line) == 0 {
return nil, errors.New("short response line")
}
switch line[0] {
case '+':
switch {
case len(line) == 3 && line[1] == 'O' && line[2] == 'K':
// Avoid allocation for frequent "+OK" response.
return okReply, nil
case len(line) == 5 && line[1] == 'P' && line[2] == 'O' && line[3] == 'N' && line[4] == 'G':
// Avoid allocation in PING command benchmarks :)
return pongReply, nil
default:
return string(line[1:]), nil
}
case '-':
return Error(string(line[1:])), nil
case ':':
return parseInt(line[1:])
case '$':
n, err := parseLen(line[1:])
if n < 0 || err != nil {
return nil, err
}
p := make([]byte, n)
_, err = io.ReadFull(c.br, p)
if err != nil {
return nil, err
}
if line, err := c.readLine(); err != nil {
return nil, err
} else if len(line) != 0 {
return nil, errors.New("bad bulk string format")
}
return p, nil
case '*':
n, err := parseLen(line[1:])
if n < 0 || err != nil {
return nil, err
}
r := make([]interface{}, n)
for i := range r {
r[i], err = c.readReply()
if err != nil {
return nil, err
}
}
return r, nil
}
return nil, errors.New("unexpected response line")
}
func (c *Client) newConn(addr string, pass string) (*Conn, error) {
co, err := ConnectWithSize(addr, c.readBufferSize, c.writeBufferSize)
if err != nil {

View File

@ -0,0 +1,456 @@
package goredis
import (
"bufio"
"bytes"
"errors"
"fmt"
"io"
"strconv"
)
type Error string
func (err Error) Error() string { return string(err) }
var (
okReply interface{} = "OK"
pongReply interface{} = "PONG"
)
type RespReader struct {
br *bufio.Reader
}
func NewRespReader(br *bufio.Reader) *RespReader {
r := &RespReader{br}
return r
}
// Parse RESP
func (resp *RespReader) Parse() (interface{}, error) {
line, err := readLine(resp.br)
if err != nil {
return nil, err
}
if len(line) == 0 {
return nil, errors.New("short resp line")
}
switch line[0] {
case '+':
switch {
case len(line) == 3 && line[1] == 'O' && line[2] == 'K':
// Avoid allocation for frequent "+OK" response.
return okReply, nil
case len(line) == 5 && line[1] == 'P' && line[2] == 'O' && line[3] == 'N' && line[4] == 'G':
// Avoid allocation in PING command benchmarks :)
return pongReply, nil
default:
return string(line[1:]), nil
}
case '-':
return Error(string(line[1:])), nil
case ':':
n, err := parseInt(line[1:])
return n, err
case '$':
n, err := parseLen(line[1:])
if n < 0 || err != nil {
return nil, err
}
p := make([]byte, n)
_, err = io.ReadFull(resp.br, p)
if err != nil {
return nil, err
}
if line, err := readLine(resp.br); err != nil {
return nil, err
} else if len(line) != 0 {
return nil, errors.New("bad bulk string format")
}
return p, nil
case '*':
n, err := parseLen(line[1:])
if n < 0 || err != nil {
return nil, err
}
r := make([]interface{}, n)
for i := range r {
r[i], err = resp.Parse()
if err != nil {
return nil, err
}
}
return r, nil
}
return nil, errors.New("unexpected response line")
}
// Parse client -> server command request, must be array of bulk strings
func (resp *RespReader) ParseRequest() ([][]byte, error) {
line, err := readLine(resp.br)
if err != nil {
return nil, err
}
if len(line) == 0 {
return nil, errors.New("short resp line")
}
switch line[0] {
case '*':
n, err := parseLen(line[1:])
if n < 0 || err != nil {
return nil, err
}
r := make([][]byte, n)
for i := range r {
r[i], err = parseBulk(resp.br)
if err != nil {
return nil, err
}
}
return r, nil
default:
return nil, fmt.Errorf("not invalid array of bulk string type, but %c", line[0])
}
}
// Parse bulk string and write it with writer w
func (resp *RespReader) ParseBulkTo(w io.Writer) error {
line, err := readLine(resp.br)
if err != nil {
return err
}
if len(line) == 0 {
return errors.New("ledis: short response line")
}
switch line[0] {
case '-':
return Error(string(line[1:]))
case '$':
n, err := parseLen(line[1:])
if n < 0 || err != nil {
return err
}
var nn int64
if nn, err = io.CopyN(w, resp.br, int64(n)); err != nil {
return err
} else if nn != int64(n) {
return io.ErrShortWrite
}
if line, err := readLine(resp.br); err != nil {
return err
} else if len(line) != 0 {
return errors.New("bad bulk string format")
}
return nil
default:
return fmt.Errorf("not invalid bulk string type, but %c", line[0])
}
}
func readLine(br *bufio.Reader) ([]byte, error) {
p, err := br.ReadSlice('\n')
if err == bufio.ErrBufferFull {
return nil, errors.New("long resp line")
}
if err != nil {
return nil, err
}
i := len(p) - 2
if i < 0 || p[i] != '\r' {
return nil, errors.New("bad resp line terminator")
}
return p[:i], nil
}
// parseLen parses bulk string and array lengths.
func parseLen(p []byte) (int, error) {
if len(p) == 0 {
return -1, errors.New("malformed length")
}
if p[0] == '-' && len(p) == 2 && p[1] == '1' {
// handle $-1 and $-1 null replies.
return -1, nil
}
var n int
for _, b := range p {
n *= 10
if b < '0' || b > '9' {
return -1, errors.New("illegal bytes in length")
}
n += int(b - '0')
}
return n, nil
}
// parseInt parses an integer reply.
func parseInt(p []byte) (int64, error) {
if len(p) == 0 {
return 0, errors.New("malformed integer")
}
var negate bool
if p[0] == '-' {
negate = true
p = p[1:]
if len(p) == 0 {
return 0, errors.New("malformed integer")
}
}
var n int64
for _, b := range p {
n *= 10
if b < '0' || b > '9' {
return 0, errors.New("illegal bytes in length")
}
n += int64(b - '0')
}
if negate {
n = -n
}
return n, nil
}
func parseBulk(br *bufio.Reader) ([]byte, error) {
line, err := readLine(br)
if err != nil {
return nil, err
}
if len(line) == 0 {
return nil, errors.New("short resp line")
}
switch line[0] {
case '$':
n, err := parseLen(line[1:])
if n < 0 || err != nil {
return nil, err
}
p := make([]byte, n)
_, err = io.ReadFull(br, p)
if err != nil {
return nil, err
}
if line, err := readLine(br); err != nil {
return nil, err
} else if len(line) != 0 {
return nil, errors.New("bad bulk string format")
}
return p, nil
default:
return nil, fmt.Errorf("not invalid bulk string type, but %c", line[0])
}
}
var (
intBuffer [][]byte
respTerm = []byte("\r\n")
nullBulk = []byte("-1")
nullArray = []byte("-1")
)
func init() {
cnt := 10000
intBuffer = make([][]byte, cnt)
for i := 0; i < cnt; i++ {
intBuffer[i] = []byte(strconv.Itoa(i))
}
}
type RespWriter struct {
bw *bufio.Writer
// Scratch space for formatting integers and floats.
numScratch [40]byte
}
func NewRespWriter(bw *bufio.Writer) *RespWriter {
r := &RespWriter{bw: bw}
return r
}
func (resp *RespWriter) Flush() error {
return resp.bw.Flush()
}
func (resp *RespWriter) writeTerm() error {
_, err := resp.bw.Write(respTerm)
return err
}
func (resp *RespWriter) writeInteger(n int64) error {
var err error
if n < int64(len(intBuffer)) {
_, err = resp.bw.Write(intBuffer[n])
} else {
_, err = resp.bw.Write(strconv.AppendInt(nil, n, 10))
}
return err
}
func (resp *RespWriter) WriteInteger(n int64) error {
resp.bw.WriteByte(':')
resp.writeInteger(n)
return resp.writeTerm()
}
func (resp *RespWriter) FlushInteger(n int64) error {
resp.WriteInteger(n)
return resp.Flush()
}
func (resp *RespWriter) WriteString(s string) error {
resp.bw.WriteByte('+')
resp.bw.WriteString(s)
return resp.writeTerm()
}
func (resp *RespWriter) FlushString(s string) error {
resp.WriteString(s)
return resp.Flush()
}
func (resp *RespWriter) WriteError(e error) error {
resp.bw.WriteByte('-')
if e != nil {
resp.bw.WriteString(e.Error())
} else {
resp.bw.WriteString("error is nil, invalid")
}
return resp.writeTerm()
}
func (resp *RespWriter) FlushError(e error) error {
resp.WriteError(e)
return resp.Flush()
}
func (resp *RespWriter) WriteBulk(b []byte) error {
resp.bw.WriteByte('$')
if b == nil {
resp.bw.Write(nullBulk)
} else {
resp.writeInteger(int64(len(b)))
resp.writeTerm()
resp.bw.Write(b)
}
return resp.writeTerm()
}
func (resp *RespWriter) FlushBulk(b []byte) error {
resp.WriteBulk(b)
return resp.Flush()
}
func (resp *RespWriter) WriteArray(ay []interface{}) error {
resp.bw.WriteByte('*')
if ay == nil {
resp.bw.Write(nullArray)
return resp.writeTerm()
} else {
resp.writeInteger(int64(len(ay)))
resp.writeTerm()
var err error
for i := 0; i < len(ay); i++ {
if err != nil {
return err
}
switch v := ay[i].(type) {
case []interface{}:
err = resp.WriteArray(v)
case []byte:
err = resp.WriteBulk(v)
case nil:
err = resp.WriteBulk(nil)
case int64:
err = resp.WriteInteger(v)
case string:
err = resp.WriteString(v)
case error:
err = resp.WriteError(v)
default:
err = fmt.Errorf("invalid array type %T %v", ay[i], v)
}
}
return err
}
}
func (resp *RespWriter) FlushArray(ay []interface{}) error {
resp.WriteArray(ay)
return resp.Flush()
}
func (resp *RespWriter) writeBulkString(s string) error {
resp.bw.WriteByte('$')
resp.writeInteger(int64(len(s)))
resp.writeTerm()
resp.bw.WriteString(s)
return resp.writeTerm()
}
func (resp *RespWriter) writeBulkInt64(n int64) error {
return resp.WriteBulk(strconv.AppendInt(resp.numScratch[:0], n, 10))
}
func (resp *RespWriter) writeBulkFloat64(n float64) error {
return resp.WriteBulk(strconv.AppendFloat(resp.numScratch[:0], n, 'g', -1, 64))
}
// RESP command is array of bulk string
func (resp *RespWriter) WriteCommand(cmd string, args ...interface{}) error {
resp.bw.WriteByte('*')
resp.writeInteger(int64(1 + len(args)))
resp.writeTerm()
err := resp.writeBulkString(cmd)
for _, arg := range args {
if err != nil {
break
}
switch arg := arg.(type) {
case string:
err = resp.writeBulkString(arg)
case []byte:
err = resp.WriteBulk(arg)
case int:
err = resp.writeBulkInt64(int64(arg))
case int64:
err = resp.writeBulkInt64(arg)
case float64:
err = resp.writeBulkFloat64(arg)
case bool:
if arg {
err = resp.writeBulkString("1")
} else {
err = resp.writeBulkString("0")
}
case nil:
err = resp.writeBulkString("")
default:
var buf bytes.Buffer
fmt.Fprint(&buf, arg)
err = resp.WriteBulk(buf.Bytes())
}
}
if err != nil {
return err
}
return resp.Flush()
}

View File

@ -0,0 +1,81 @@
package goredis
import (
"bufio"
"bytes"
"reflect"
"testing"
)
func TestResp(t *testing.T) {
var buf bytes.Buffer
reader := NewRespReader(bufio.NewReader(&buf))
writer := NewRespWriter(bufio.NewWriter(&buf))
if err := writer.WriteCommand("SELECT", 1); err != nil {
t.Fatal(err)
} else {
if reqs, err := reader.ParseRequest(); err != nil {
t.Fatal(err)
} else if len(reqs) != 2 {
t.Fatal(len(reqs))
} else if string(reqs[0]) != "SELECT" {
t.Fatal(string(reqs[0]))
} else if string(reqs[1]) != "1" {
t.Fatal(string(reqs[1]))
}
}
if err := writer.FlushInteger(10); err != nil {
t.Fatal(err)
} else {
if n, err := Int64(reader.Parse()); err != nil {
t.Fatal(err)
} else if n != 10 {
t.Fatal(n)
}
}
if err := writer.FlushString("abc"); err != nil {
t.Fatal(err)
} else {
if s, err := String(reader.Parse()); err != nil {
t.Fatal(err)
} else if s != "abc" {
t.Fatal(s)
}
}
if err := writer.FlushBulk([]byte("abc")); err != nil {
t.Fatal(err)
} else {
if s, err := String(reader.Parse()); err != nil {
t.Fatal(err)
} else if s != "abc" {
t.Fatal(s)
}
}
ay := []interface{}{[]byte("SET"), []byte("a"), []byte("1")}
if err := writer.FlushArray(ay); err != nil {
t.Fatal(err)
} else {
if oy, err := reader.Parse(); err != nil {
t.Fatal(err)
} else if !reflect.DeepEqual(oy, ay) {
t.Fatalf("%#v", oy)
}
}
e := Error("hello world")
if err := writer.FlushError(e); err != nil {
t.Fatal(err)
} else {
if ee, err := reader.Parse(); err != nil {
t.Fatal("must error")
} else if !reflect.DeepEqual(e, ee) {
t.Fatal(ee)
}
}
}

View File

@ -4,10 +4,10 @@ import (
"bufio"
"errors"
"fmt"
"github.com/siddontang/go/arena"
"github.com/siddontang/go/hack"
"github.com/siddontang/go/log"
"github.com/siddontang/go/num"
"github.com/siddontang/goredis"
"github.com/siddontang/ledisdb/ledis"
"io"
"net"
@ -23,9 +23,8 @@ type respClient struct {
*client
conn net.Conn
rb *bufio.Reader
ar *arena.Arena
respReader *goredis.RespReader
activeQuit bool
}
@ -76,14 +75,12 @@ func newClientRESP(conn net.Conn, app *App) {
tcpConn.SetWriteBuffer(app.cfg.ConnWriteBufferSize)
}
c.rb = bufio.NewReaderSize(conn, app.cfg.ConnReadBufferSize)
br := bufio.NewReaderSize(conn, app.cfg.ConnReadBufferSize)
c.respReader = goredis.NewRespReader(br)
c.resp = newWriterRESP(conn, app.cfg.ConnWriteBufferSize)
c.remoteAddr = conn.RemoteAddr().String()
//maybe another config?
c.ar = arena.NewArena(app.cfg.ConnReadBufferSize)
app.connWait.Add(1)
app.addRespClient(c)
@ -131,14 +128,12 @@ func (c *respClient) run() {
c.conn.SetReadDeadline(time.Now().Add(kc))
}
reqData, err := c.readRequest()
c.cmd = ""
c.args = nil
reqData, err := c.respReader.ParseRequest()
if err == nil {
err = c.handleRequest(reqData)
c.cmd = ""
c.args = nil
c.ar.Reset()
}
if err != nil {
@ -147,10 +142,6 @@ func (c *respClient) run() {
}
}
func (c *respClient) readRequest() ([][]byte, error) {
return ReadRequest(c.rb, c.ar)
}
func (c *respClient) handleRequest(reqData [][]byte) error {
if len(reqData) == 0 {
c.cmd = ""
@ -221,7 +212,7 @@ func newWriterRESP(conn net.Conn, size int) *respWriter {
}
func (w *respWriter) writeError(err error) {
w.buff.Write(hack.Slice("-ERR"))
w.buff.Write(hack.Slice("-"))
if err != nil {
w.buff.WriteByte(' ')
w.buff.Write(hack.Slice(err.Error()))

View File

@ -1,128 +1,6 @@
package server
import (
"bufio"
"errors"
"fmt"
"github.com/siddontang/go/arena"
"io"
)
var (
errLineFormat = errors.New("bad response line format")
)
func ReadLine(rb *bufio.Reader) ([]byte, error) {
p, err := rb.ReadSlice('\n')
if err != nil {
return nil, err
}
i := len(p) - 2
if i < 0 || p[i] != '\r' {
return nil, errLineFormat
}
return p[:i], nil
}
func readBytes(br *bufio.Reader, a *arena.Arena) (bytes []byte, err error) {
size, err := readLong(br)
if err != nil {
return nil, err
}
if size == -1 {
return nil, nil
}
if size < 0 {
return nil, errors.New("Invalid size: " + fmt.Sprint("%d", size))
}
buf := a.Make(int(size) + 2)
if _, err = io.ReadFull(br, buf); err != nil {
return nil, err
}
if buf[len(buf)-2] != '\r' && buf[len(buf)-1] != '\n' {
return nil, errors.New("bad bulk string format")
}
bytes = buf[0 : len(buf)-2]
return
}
func readLong(in *bufio.Reader) (result int64, err error) {
read, err := in.ReadByte()
if err != nil {
return -1, err
}
var sign int
if read == '-' {
read, err = in.ReadByte()
if err != nil {
return -1, err
}
sign = -1
} else {
sign = 1
}
var number int64
for number = 0; err == nil; read, err = in.ReadByte() {
if read == '\r' {
read, err = in.ReadByte()
if err != nil {
return -1, err
}
if read == '\n' {
return number * int64(sign), nil
} else {
return -1, errors.New("Bad line ending")
}
}
value := read - '0'
if value >= 0 && value < 10 {
number *= 10
number += int64(value)
} else {
return -1, errors.New("Invalid digit")
}
}
return -1, err
}
func ReadRequest(in *bufio.Reader, a *arena.Arena) ([][]byte, error) {
code, err := in.ReadByte()
if err != nil {
return nil, err
}
if code != '*' {
return nil, errReadRequest
}
var nparams int64
if nparams, err = readLong(in); err != nil {
return nil, err
} else if nparams <= 0 {
return nil, errReadRequest
}
req := make([][]byte, nparams)
for i := range req {
if code, err = in.ReadByte(); err != nil {
return nil, err
} else if code != '$' {
return nil, errReadRequest
}
if req[i], err = readBytes(in, a); err != nil {
return nil, err
}
}
return req, nil
}
import ()
func lowerSlice(buf []byte) []byte {
for i, r := range buf {