commit a74d9a5801560e5e95c67a276df30ee127ca9e8b
Author: Vladimir Mihailenco <vladimir.webdev@gmail.com>
Date:   Wed Jul 25 16:00:50 2012 +0300

    Initial commit.

diff --git a/README.md b/README.md
new file mode 100644
index 0000000..ffba868
--- /dev/null
+++ b/README.md
@@ -0,0 +1,104 @@
+Readme
+======
+
+Sync Redis client for Golang.
+
+Usage
+-----
+
+Example:
+
+    connect := func() (io.ReadWriter, error) {
+        fmt.Println("Connecting...")
+        return net.Dial("tcp", "localhost:6379")
+    }
+
+    disconnect := func(conn io.ReadWriter) error {
+        fmt.Println("Disconnecting...")
+        conn.Close()
+        return nil
+    }
+
+    redisClient = redis.NewClient(connect, disconnect)
+
+    _, err := redisClient.Set("foo", "bar").Reply()
+    if err != nil {
+       panic(err)
+    }
+
+    value, err := redisClient.Get("foo").Reply()
+    if err != nil {
+       panic(err)
+    }
+
+Multi/Exec
+----------
+
+Example 1:
+
+    multiClient := redisClient.Multi()
+    futureGet1 := multiClient.Get("foo1")
+    futureGet2 := multiClient.Get("foo2")
+    _, err := multiClient.Exec()
+    if err != nil {
+       panic(err)
+    }
+
+    value1, err := futureGet1.Reply()
+    if err != nil {
+       panic(err)
+    }
+
+    value2, err := futureGet2.Reply()
+    if err != nil {
+       panic(err)
+    }
+
+Example 2:
+
+    multiClient := redisClient.Multi()
+    multiClient.Get("foo1")
+    multiClient.Get("foo2")
+    reqs, err := multiClient.Exec()
+    if err != nil {
+       panic(err)
+    }
+
+    for req := range reqs {
+        value, err := req.Reply()
+        if err != nil {
+           panic(err)
+        }
+    }
+
+Pub/sub
+-------
+
+Publish:
+
+    _, err := redisClient.Publish("mychannel", "hello").Reply()
+    if err != nil {
+        panic(err)
+    }
+
+Subscribe:
+
+    pubsub := redisClient.PubSubClient()
+    ch, err := pubsub.Subscribe("mychannel")
+    if err != nil {
+        panic(err)
+    }
+
+    go func() {
+        for msg := range ch {
+            if msg.Err != nil {
+                panic(err)
+            }
+            fmt.Println(msg.Message)
+        }
+    }
+
+Thread safety
+-------------
+
+Client is thread safe. Internally sync.Mutex is used to synchronize writes and reads.
diff --git a/commands.go b/commands.go
new file mode 100644
index 0000000..2e28b7a
--- /dev/null
+++ b/commands.go
@@ -0,0 +1,162 @@
+package redis
+
+import (
+	"strconv"
+)
+
+//------------------------------------------------------------------------------
+
+func (c *Client) Ping() *StatusReq {
+	req := NewStatusReq("PING")
+	c.Run(req)
+	return req
+}
+
+func (c *Client) Flushall() *StatusReq {
+	req := NewStatusReq("FLUSHALL")
+	c.Run(req)
+	return req
+}
+
+func (c *Client) Flushdb() *StatusReq {
+	req := NewStatusReq("FLUSHDB")
+	c.Run(req)
+	return req
+}
+
+//------------------------------------------------------------------------------
+
+func (c *Client) Get(key string) *BulkReq {
+	req := NewBulkReq("GET", key)
+	c.Run(req)
+	return req
+}
+
+func (c *Client) Set(key, value string) *StatusReq {
+	req := NewStatusReq("SET", key, value)
+	c.Run(req)
+	return req
+}
+
+func (c *Client) Auth(password string) *StatusReq {
+	req := NewStatusReq("AUTH", password)
+	c.Run(req)
+	return req
+}
+
+//------------------------------------------------------------------------------
+
+func (c *Client) Sadd(key string, members ...string) *IntReq {
+	args := append([]string{"SADD", key}, members...)
+	req := NewIntReq(args...)
+	c.Run(req)
+	return req
+}
+
+func (c *Client) Srem(key string, members ...string) *IntReq {
+	args := append([]string{"SREM", key}, members...)
+	req := NewIntReq(args...)
+	c.Run(req)
+	return req
+}
+
+func (c *Client) Smembers(key string) *MultiBulkReq {
+	req := NewMultiBulkReq("SMEMBERS", key)
+	c.Run(req)
+	return req
+}
+
+//------------------------------------------------------------------------------
+
+func (c *Client) Multi() *MultiClient {
+	return NewMultiClient(c.connect, c.disconnect)
+}
+
+//------------------------------------------------------------------------------
+
+func (c *Client) PubSubClient() *PubSubClient {
+	return NewPubSubClient(c.connect, c.disconnect)
+}
+
+func (c *Client) Publish(channel, message string) *IntReq {
+	req := NewIntReq("PUBLISH", channel, message)
+	c.Run(req)
+	return req
+}
+
+//------------------------------------------------------------------------------
+
+func (c *Client) Hset(key, field, value string) *BoolReq {
+	req := NewBoolReq("HSET", key, field, value)
+	c.Run(req)
+	return req
+}
+
+func (c *Client) Hsetnx(key, field, value string) *BoolReq {
+	req := NewBoolReq("HSETNX", key, field, value)
+	c.Run(req)
+	return req
+}
+
+func (c *Client) Hmset(key, field, value string, pairs ...string) *StatusReq {
+	args := append([]string{"HMSET", key, field, value}, pairs...)
+	req := NewStatusReq(args...)
+	c.Run(req)
+	return req
+}
+
+func (c *Client) Hget(key, field string) *BulkReq {
+	req := NewBulkReq("HGET", key, field)
+	c.Run(req)
+	return req
+}
+
+func (c *Client) Hmget(key string, fields ...string) *MultiBulkReq {
+	args := append([]string{"HMGET", key}, fields...)
+	req := NewMultiBulkReq(args...)
+	c.Run(req)
+	return req
+}
+
+func (c *Client) Hexists(key, field string) *BoolReq {
+	req := NewBoolReq("HEXISTS", key, field)
+	c.Run(req)
+	return req
+}
+
+func (c *Client) Hdel(key string, fields ...string) *IntReq {
+	args := append([]string{"HDEL", key}, fields...)
+	req := NewIntReq(args...)
+	c.Run(req)
+	return req
+}
+
+func (c *Client) Hlen(key string) *IntReq {
+	req := NewIntReq("HLEN", key)
+	c.Run(req)
+	return req
+}
+
+func (c *Client) Hgetall(key string) *MultiBulkReq {
+	req := NewMultiBulkReq("HGETALL", key)
+	c.Run(req)
+	return req
+}
+
+func (c *Client) Hkeys(key string) *MultiBulkReq {
+	req := NewMultiBulkReq("HKEYS", key)
+	c.Run(req)
+	return req
+}
+
+func (c *Client) Hvals(key string) *MultiBulkReq {
+	req := NewMultiBulkReq("HVALS", key)
+	c.Run(req)
+	return req
+}
+
+func (c *Client) Hincrby(key, field string, incr int64) *IntReq {
+	req := NewIntReq("HINCRBY", key, field, strconv.FormatInt(incr, 10))
+	c.Run(req)
+	return req
+}
diff --git a/multi.go b/multi.go
new file mode 100644
index 0000000..20b2dcc
--- /dev/null
+++ b/multi.go
@@ -0,0 +1,48 @@
+package redis
+
+type MultiClient struct {
+	*Client
+	reqs []Req
+}
+
+func NewMultiClient(connect connectFunc, disconnect disconnectFunc) *MultiClient {
+	return &MultiClient{
+		Client: NewClient(connect, disconnect),
+		reqs:   make([]Req, 0),
+	}
+
+}
+
+func (c *MultiClient) queueReq(req Req) {
+	c.reqs = append(c.reqs, req)
+}
+
+func (c *MultiClient) run(req Req) {
+	c.queueReq(req)
+}
+
+func (c *MultiClient) Exec() ([]Req, error) {
+	c.mtx.Lock()
+	defer c.mtx.Unlock()
+
+	reqs := c.reqs
+	c.reqs = make([]Req, 0)
+
+	multiReq := make([]byte, 0, 8192)
+	multiReq = append(multiReq, PackReq([]string{"MULTI"})...)
+	for _, req := range reqs {
+		multiReq = append(multiReq, req.Req()...)
+	}
+	multiReq = append(multiReq, PackReq([]string{"EXEC"})...)
+
+	buf, err := c.WriteRead(multiReq)
+	if err != nil {
+		return nil, err
+	}
+
+	for _, req := range reqs {
+		req.ParseReply(buf)
+	}
+
+	return reqs, nil
+}
diff --git a/pubsub.go b/pubsub.go
new file mode 100644
index 0000000..fd3f022
--- /dev/null
+++ b/pubsub.go
@@ -0,0 +1,97 @@
+package redis
+
+import (
+	"fmt"
+)
+
+type PubSubClient struct {
+	*Client
+	isSubscribed bool
+	ch           chan *Message
+}
+
+func NewPubSubClient(connect connectFunc, disconnect disconnectFunc) *PubSubClient {
+	c := &PubSubClient{
+		Client: NewClient(connect, disconnect),
+		ch:     make(chan *Message),
+	}
+	return c
+}
+
+type Message struct {
+	Name, Channel, Message string
+	Number                 int64
+
+	Err error
+}
+
+func (c *PubSubClient) consumeMessages() {
+	req := NewMultiBulkReq()
+
+	for {
+		// Replies can arrive in batches.
+		// Read whole reply and parse messages one by one.
+		rd, err := c.ReadReply()
+		if err != nil {
+			msg := &Message{}
+			msg.Err = err
+			c.ch <- msg
+			return
+		}
+
+		for {
+			msg := &Message{}
+
+			req.ParseReply(rd)
+			reply, err := req.Reply()
+			if err != nil {
+				msg.Err = err
+				c.ch <- msg
+				break
+			}
+
+			msgName := reply[0].(string)
+			switch msgName {
+			case "subscribe", "unsubscribe":
+				msg.Name = msgName
+				msg.Channel = reply[1].(string)
+				msg.Number = reply[2].(int64)
+			case "message":
+				msg.Name = msgName
+				msg.Channel = reply[1].(string)
+				msg.Message = reply[2].(string)
+			default:
+				msg.Err = fmt.Errorf("Unsupported message name: %q.", msgName)
+			}
+			c.ch <- msg
+
+			if !rd.HasUnread() {
+				break
+			}
+		}
+	}
+}
+
+func (c *PubSubClient) Subscribe(channels ...string) (chan *Message, error) {
+	args := append([]string{"SUBSCRIBE"}, channels...)
+	req := NewMultiBulkReq(args...)
+
+	if err := c.WriteReq(req.Req()); err != nil {
+		return nil, err
+	}
+
+	c.mtx.Lock()
+	if !c.isSubscribed {
+		c.isSubscribed = true
+		go c.consumeMessages()
+	}
+	c.mtx.Unlock()
+
+	return c.ch, nil
+}
+
+func (c *PubSubClient) Unsubscribe(channels ...string) error {
+	args := append([]string{"UNSUBSCRIBE"}, channels...)
+	req := NewMultiBulkReq(args...)
+	return c.WriteReq(req.Req())
+}
diff --git a/redis.go b/redis.go
new file mode 100644
index 0000000..4b606a1
--- /dev/null
+++ b/redis.go
@@ -0,0 +1,93 @@
+package redis
+
+import (
+	"io"
+	"sync"
+
+	"github.com/togoio/redisgoproxy/bufreader"
+)
+
+type connectFunc func() (io.ReadWriter, error)
+type disconnectFunc func(io.ReadWriter)
+
+type Client struct {
+	mtx        sync.Mutex
+	connect    connectFunc
+	disconnect disconnectFunc
+	currConn   io.ReadWriter
+	rd         *bufreader.Reader
+}
+
+func NewClient(connect connectFunc, disconnect disconnectFunc) *Client {
+	return &Client{
+		rd:         bufreader.NewSizedReader(8192),
+		connect:    connect,
+		disconnect: disconnect,
+	}
+}
+
+func (c *Client) Close() error {
+	if c.disconnect != nil {
+		c.disconnect(c.currConn)
+	}
+	c.currConn = nil
+	return nil
+}
+
+func (c *Client) conn() (io.ReadWriter, error) {
+	if c.currConn == nil {
+		currConn, err := c.connect()
+		if err != nil {
+			return nil, err
+		}
+		c.currConn = currConn
+	}
+	return c.currConn, nil
+}
+
+func (c *Client) WriteReq(buf []byte) error {
+	conn, err := c.conn()
+	if err != nil {
+		return err
+	}
+	_, err = conn.Write(buf)
+	if err != nil {
+		c.Close()
+	}
+	return err
+}
+
+func (c *Client) ReadReply() (*bufreader.Reader, error) {
+	conn, err := c.conn()
+	if err != nil {
+		return nil, err
+	}
+	_, err = c.rd.ReadFrom(conn)
+	if err != nil {
+		c.Close()
+		return nil, err
+	}
+	return c.rd, nil
+}
+
+func (c *Client) WriteRead(buf []byte) (*bufreader.Reader, error) {
+	if err := c.WriteReq(buf); err != nil {
+		return nil, err
+	}
+	return c.ReadReply()
+}
+
+func (c *Client) Run(req Req) {
+	c.mtx.Lock()
+	c.run(req)
+	c.mtx.Unlock()
+}
+
+func (c *Client) run(req Req) {
+	buf, err := c.WriteRead(req.Req())
+	if err != nil {
+		req.SetErr(err)
+		return
+	}
+	req.ParseReply(buf)
+}
diff --git a/redis_test.go b/redis_test.go
new file mode 100644
index 0000000..0ee5c3f
--- /dev/null
+++ b/redis_test.go
@@ -0,0 +1,262 @@
+package redis_test
+
+import (
+	"io"
+	"net"
+	"testing"
+	"time"
+
+	. "launchpad.net/gocheck"
+
+	"github.com/togoio/redisgoproxy/redis"
+)
+
+//------------------------------------------------------------------------------
+
+type RedisTest struct {
+	redisC *redis.Client
+}
+
+var _ = Suite(&RedisTest{})
+
+func Test(t *testing.T) { TestingT(t) }
+
+//------------------------------------------------------------------------------
+
+func (t *RedisTest) SetUpTest(c *C) {
+	connect := func() (io.ReadWriter, error) {
+		return net.Dial("tcp", "localhost:6379")
+	}
+
+	t.redisC = redis.NewClient(connect, nil)
+	t.redisC.Flushdb()
+}
+
+func (t *RedisTest) TearDownTest(c *C) {
+	t.redisC.Flushdb()
+}
+
+func (t *RedisTest) TestPing(c *C) {
+	_, err := t.redisC.Ping().Reply()
+	c.Check(err, IsNil)
+}
+
+func (t *RedisTest) TestSetGet(c *C) {
+	key := "foo"
+	value := "bar"
+
+	_, err := t.redisC.Set(key, value).Reply()
+	c.Check(err, IsNil)
+
+	v, err := t.redisC.Get("foo").Reply()
+	c.Check(err, IsNil)
+	c.Check(v, Equals, value)
+
+	_, err = t.redisC.Get("_").Reply()
+	c.Check(err, Equals, redis.Nil)
+}
+
+func (t *RedisTest) TestHmsetHmget(c *C) {
+	_, err := t.redisC.Hmset("myhash", "foo1", "bar1", "foo2", "bar2").Reply()
+	c.Check(err, IsNil)
+
+	pairs, err := t.redisC.Hmget("myhash", "foo1", "foo3", "foo2").Reply()
+	c.Check(err, IsNil)
+	c.Check(pairs, HasLen, 3)
+	c.Check(pairs[0], Equals, "bar1")
+	c.Check(pairs[1], Equals, nil)
+	c.Check(pairs[2], Equals, "bar2")
+}
+
+func (t *RedisTest) TestSet(c *C) {
+	n, err := t.redisC.Sadd("myset", "foo").Reply()
+	c.Check(err, IsNil)
+	c.Check(n, Equals, int64(1))
+
+	members, err := t.redisC.Smembers("myset").Reply()
+	c.Check(err, IsNil)
+	c.Check(members, HasLen, 1)
+	c.Check(members[0], Equals, "foo")
+
+	n, err = t.redisC.Srem("myset", "foo").Reply()
+	c.Check(err, IsNil)
+	c.Check(n, Equals, int64(1))
+}
+
+func (t *RedisTest) TestHsetnx(c *C) {
+	wasSet, err := t.redisC.Hsetnx("myhash", "foo1", "bar1").Reply()
+	c.Check(err, IsNil)
+	c.Check(wasSet, Equals, true)
+
+	wasSet, err = t.redisC.Hsetnx("myhash", "foo1", "bar1").Reply()
+	c.Check(err, IsNil)
+	c.Check(wasSet, Equals, false)
+}
+
+func (t *RedisTest) TestHash(c *C) {
+	_, err := t.redisC.Hset("myhash", "foo", "bar").Reply()
+	c.Check(err, IsNil)
+
+	v, err := t.redisC.Hget("myhash", "foo").Reply()
+	c.Check(err, IsNil)
+	c.Check(v, Equals, "bar")
+
+	exists, err := t.redisC.Hexists("myhash", "foo").Reply()
+	c.Check(err, IsNil)
+	c.Check(exists, Equals, true)
+
+	hlen, err := t.redisC.Hlen("myhash").Reply()
+	c.Check(err, IsNil)
+	c.Check(hlen, Equals, int64(1))
+
+	res, err := t.redisC.Hgetall("myhash").Reply()
+	c.Check(err, IsNil)
+	c.Check(res, HasLen, 2)
+	c.Check(res[0], Equals, "foo")
+	c.Check(res[1], Equals, "bar")
+
+	keys, err := t.redisC.Hkeys("myhash").Reply()
+	c.Check(err, IsNil)
+	c.Check(keys, HasLen, 1)
+	c.Check(keys[0], Equals, "foo")
+
+	vals, err := t.redisC.Hvals("myhash").Reply()
+	c.Check(err, IsNil)
+	c.Check(vals, HasLen, 1)
+	c.Check(vals[0], Equals, "bar")
+
+	n, err := t.redisC.Hdel("myhash", "foo").Reply()
+	c.Check(err, IsNil)
+	c.Check(n, Equals, int64(1))
+
+	wasSet, err := t.redisC.Hset("myhash", "counter", "0").Reply()
+	c.Check(err, IsNil)
+	c.Check(wasSet, Equals, true)
+
+	counter, err := t.redisC.Hincrby("myhash", "counter", 1).Reply()
+	c.Check(err, IsNil)
+	c.Check(counter, Equals, int64(1))
+}
+
+func (t *RedisTest) TestPubSub(c *C) {
+	pubsub := t.redisC.PubSubClient()
+
+	ch, err := pubsub.Subscribe("mychannel")
+	c.Check(err, IsNil)
+	c.Check(ch, Not(Equals), nil)
+
+	ch, err = pubsub.Subscribe("mychannel2")
+	c.Check(err, IsNil)
+	c.Check(ch, Not(Equals), nil)
+
+	n, err := t.redisC.Publish("mychannel", "hello").Reply()
+	c.Check(err, IsNil)
+	c.Check(n, Equals, int64(1))
+
+	n, err = t.redisC.Publish("mychannel2", "hello2").Reply()
+	c.Check(err, IsNil)
+	c.Check(n, Equals, int64(1))
+
+	err = pubsub.Unsubscribe("mychannel")
+	c.Check(err, IsNil)
+
+	err = pubsub.Unsubscribe("mychannel2")
+	c.Check(err, IsNil)
+
+	select {
+	case msg := <-ch:
+		c.Check(msg.Err, Equals, nil)
+		c.Check(msg.Name, Equals, "subscribe")
+		c.Check(msg.Channel, Equals, "mychannel")
+		c.Check(msg.Number, Equals, int64(1))
+	case <-time.After(time.Second):
+		c.Error("Channel is empty.")
+	}
+
+	select {
+	case msg := <-ch:
+		c.Check(msg.Err, Equals, nil)
+		c.Check(msg.Name, Equals, "subscribe")
+		c.Check(msg.Channel, Equals, "mychannel2")
+		c.Check(msg.Number, Equals, int64(2))
+	case <-time.After(time.Second):
+		c.Error("Channel is empty.")
+	}
+
+	select {
+	case msg := <-ch:
+		c.Check(msg.Err, Equals, nil)
+		c.Check(msg.Name, Equals, "message")
+		c.Check(msg.Channel, Equals, "mychannel")
+		c.Check(msg.Message, Equals, "hello")
+	case <-time.After(time.Second):
+		c.Error("Channel is empty.")
+	}
+
+	select {
+	case msg := <-ch:
+		c.Check(msg.Err, Equals, nil)
+		c.Check(msg.Name, Equals, "message")
+		c.Check(msg.Channel, Equals, "mychannel2")
+		c.Check(msg.Message, Equals, "hello2")
+	case <-time.After(time.Second):
+		c.Error("Channel is empty.")
+	}
+
+	select {
+	case msg := <-ch:
+		c.Check(msg.Err, Equals, nil)
+		c.Check(msg.Name, Equals, "unsubscribe")
+		c.Check(msg.Channel, Equals, "mychannel")
+		c.Check(msg.Number, Equals, int64(1))
+	case <-time.After(time.Second):
+		c.Error("Channel is empty.")
+	}
+
+	select {
+	case msg := <-ch:
+		c.Check(msg.Err, Equals, nil)
+		c.Check(msg.Name, Equals, "unsubscribe")
+		c.Check(msg.Channel, Equals, "mychannel2")
+		c.Check(msg.Number, Equals, int64(0))
+	case <-time.After(time.Second):
+		c.Error("Channel is empty.")
+	}
+}
+
+func (t *RedisTest) TestMultiExec(c *C) {
+	multiC := t.redisC.Multi()
+
+	setR := multiC.Set("foo", "bar")
+	getR := multiC.Get("foo")
+
+	_, err := multiC.Exec()
+	c.Check(err, IsNil)
+
+	_, err = setR.Reply()
+	c.Check(err, IsNil)
+
+	v, err := getR.Reply()
+	c.Check(err, IsNil)
+	c.Check(v, Equals, "bar")
+}
+
+//------------------------------------------------------------------------------
+
+func (t *RedisTest) BenchmarkPing(c *C) {
+	for i := 0; i < c.N; i++ {
+		t.redisC.Ping().Reply()
+	}
+}
+
+func (t *RedisTest) BenchmarkSet(c *C) {
+	for i := 0; i < c.N; i++ {
+		t.redisC.Set("foo", "bar").Reply()
+	}
+}
+
+func (t *RedisTest) BenchmarkGet(c *C) {
+	for i := 0; i < c.N; i++ {
+		t.redisC.Get("foo").Reply()
+	}
+}
diff --git a/request.go b/request.go
new file mode 100644
index 0000000..2ecb3a6
--- /dev/null
+++ b/request.go
@@ -0,0 +1,334 @@
+package redis
+
+import (
+	"errors"
+	"fmt"
+	"io"
+	"strconv"
+
+	"github.com/togoio/redisgoproxy/bufreader"
+)
+
+var Nil = errors.New("(nil)")
+
+//------------------------------------------------------------------------------
+
+func ParseReq(rd *bufreader.Reader) ([]string, error) {
+	line, err := rd.ReadLine('\n')
+	if err != nil {
+		return nil, err
+	}
+	if line[0] != '*' {
+		return []string{string(line)}, nil
+	}
+
+	args := make([]string, 0)
+	for {
+		line, err = rd.ReadLine('\n')
+		if err != nil {
+			if err == io.EOF {
+				break
+			}
+			return nil, err
+		}
+		if line[0] != '$' {
+			return nil, fmt.Errorf("Expected '$', but got %q of %q.", line, rd.Bytes())
+		}
+
+		line, err = rd.ReadLine('\n')
+		args = append(args, string(line))
+	}
+	return args, nil
+}
+
+//------------------------------------------------------------------------------
+
+func PackReq(args []string) []byte {
+	buf := make([]byte, 0, 1024)
+	buf = append(buf, '*')
+	buf = strconv.AppendUint(buf, uint64(len(args)), 10)
+	buf = append(buf, '\r', '\n')
+	for _, arg := range args {
+		buf = append(buf, '$')
+		buf = strconv.AppendUint(buf, uint64(len(arg)), 10)
+		buf = append(buf, '\r', '\n')
+		buf = append(buf, []byte(arg)...)
+		buf = append(buf, '\r', '\n')
+	}
+	return buf
+}
+
+//------------------------------------------------------------------------------
+
+type Req interface {
+	Req() []byte
+	ParseReply(*bufreader.Reader)
+	SetErr(error)
+	Err() error
+}
+
+//------------------------------------------------------------------------------
+
+type BaseReq struct {
+	args []string
+	err  error
+}
+
+func NewBaseReq(args ...string) *BaseReq {
+	return &BaseReq{
+		args: args,
+	}
+}
+
+func (r *BaseReq) Req() []byte {
+	return PackReq(r.args)
+}
+
+func (r *BaseReq) SetErr(err error) {
+	r.err = err
+}
+
+func (r *BaseReq) Err() error {
+	return r.err
+}
+
+//------------------------------------------------------------------------------
+
+type StatusReq struct {
+	*BaseReq
+	val string
+}
+
+func NewStatusReq(args ...string) *StatusReq {
+	return &StatusReq{
+		BaseReq: NewBaseReq(args...),
+	}
+}
+
+func (r *StatusReq) ParseReply(rd *bufreader.Reader) {
+	var line []byte
+
+	line, r.err = rd.ReadLine('\n')
+	if r.err != nil {
+		return
+	}
+
+	if line[0] == '-' {
+		r.err = errors.New(string(line[1:]))
+		return
+	} else if line[0] != '+' {
+		r.err = fmt.Errorf("Expected '+', but got %q of %q.", line, rd.Bytes())
+		return
+	}
+
+	r.val = string(line[1:])
+}
+
+func (r *StatusReq) Reply() (string, error) {
+	return r.val, r.err
+}
+
+//------------------------------------------------------------------------------
+
+type IntReq struct {
+	*BaseReq
+	val int64
+}
+
+func NewIntReq(args ...string) *IntReq {
+	return &IntReq{
+		BaseReq: NewBaseReq(args...),
+	}
+}
+
+func (r *IntReq) ParseReply(rd *bufreader.Reader) {
+	var line []byte
+
+	line, r.err = rd.ReadLine('\n')
+	if r.err != nil {
+		return
+	}
+
+	if line[0] == '-' {
+		r.err = errors.New(string(line[1:]))
+		return
+	} else if line[0] != ':' {
+		r.err = fmt.Errorf("Expected ':', but got %q of %q.", line, rd.Bytes())
+		return
+	}
+
+	r.val, r.err = strconv.ParseInt(string(line[1:]), 10, 64)
+}
+
+func (r *IntReq) Reply() (int64, error) {
+	return r.val, r.err
+}
+
+//------------------------------------------------------------------------------
+
+type BoolReq struct {
+	*BaseReq
+	val bool
+}
+
+func NewBoolReq(args ...string) *BoolReq {
+	return &BoolReq{
+		BaseReq: NewBaseReq(args...),
+	}
+}
+
+func (r *BoolReq) ParseReply(rd *bufreader.Reader) {
+	var line []byte
+
+	line, r.err = rd.ReadLine('\n')
+	if r.err != nil {
+		return
+	}
+
+	if line[0] == '-' {
+		r.err = errors.New(string(line[1:]))
+		return
+	} else if line[0] != ':' {
+		r.err = fmt.Errorf("Expected ':', but got %q of %q.", line, rd.Bytes())
+		return
+	}
+
+	r.val = line[1] == '1'
+}
+
+func (r *BoolReq) Reply() (bool, error) {
+	return r.val, r.err
+}
+
+//------------------------------------------------------------------------------
+
+type BulkReq struct {
+	*BaseReq
+	val string
+}
+
+func NewBulkReq(args ...string) *BulkReq {
+	return &BulkReq{
+		BaseReq: NewBaseReq(args...),
+	}
+}
+
+func (r *BulkReq) ParseReply(rd *bufreader.Reader) {
+	var line []byte
+
+	line, r.err = rd.ReadLine('\n')
+	if r.err != nil {
+		return
+	}
+
+	if line[0] == '-' {
+		r.err = errors.New(string(line[1:]))
+		return
+	} else if line[0] != '$' {
+		r.err = fmt.Errorf("Expected '$', but got %q of %q.", line, rd.Bytes())
+		return
+	}
+
+	if len(line) >= 3 && line[1] == '-' && line[2] == '1' {
+		r.err = Nil
+		return
+	}
+
+	line, r.err = rd.ReadLine('\n')
+	if r.err != nil {
+		return
+	}
+
+	r.val = string(line)
+}
+
+func (r *BulkReq) Reply() (string, error) {
+	return r.val, r.err
+}
+
+//------------------------------------------------------------------------------
+
+type MultiBulkReq struct {
+	*BaseReq
+	val []interface{}
+}
+
+func NewMultiBulkReq(args ...string) *MultiBulkReq {
+	return &MultiBulkReq{
+		BaseReq: NewBaseReq(args...),
+	}
+}
+
+func (r *MultiBulkReq) ParseReply(rd *bufreader.Reader) {
+	var line []byte
+
+	line, r.err = rd.ReadLine('\n')
+	if r.err != nil {
+		return
+	}
+
+	if line[0] == '-' {
+		r.err = errors.New(string(line[1:]))
+		return
+	} else if line[0] != '*' {
+		r.err = fmt.Errorf("Expected '*', but got line %q of %q.", line, rd.Bytes())
+		return
+	}
+
+	val := make([]interface{}, 0)
+
+	if len(line) >= 2 && line[1] == '0' {
+		r.val = val
+		return
+	} else if len(line) >= 3 && line[1] == '-' && line[2] == '1' {
+		r.err = Nil
+		return
+	}
+
+	line, r.err = rd.ReadLine('\n')
+	if r.err != nil {
+		return
+	}
+	for {
+		if line[0] == ':' {
+			var n int64
+			n, r.err = strconv.ParseInt(string(line[1:]), 10, 64)
+			if r.err != nil {
+				return
+			}
+			val = append(val, n)
+		} else if line[0] == '$' {
+			if len(line) >= 2 && line[1] == '0' {
+				val = append(val, "")
+			} else if len(line) >= 3 && line[1] == '-' && line[2] == '1' {
+				val = append(val, nil)
+			} else {
+				line, r.err = rd.ReadLine('\n')
+				if r.err != nil {
+					return
+				}
+				val = append(val, string(line))
+			}
+		} else {
+			r.err = fmt.Errorf("Expected '$', but got line %q of %q.", line, rd.Bytes())
+			return
+		}
+
+		line, r.err = rd.ReadLine('\n')
+		if r.err == io.EOF {
+			r.err = nil
+			break
+		}
+		// Check for start of another reply.
+		if line[0] == '*' {
+			rd.UnreadLine('\n')
+			break
+		}
+	}
+
+	r.val = val
+}
+
+func (r *MultiBulkReq) Reply() ([]interface{}, error) {
+	return r.val, r.err
+}