178 lines
3.2 KiB
Go
178 lines
3.2 KiB
Go
package client
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import (
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"bytes"
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"encoding/json"
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"io/ioutil"
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"net"
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"net/http"
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"strconv"
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"strings"
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"time"
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)
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const (
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publishEndpoint = "/publish"
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subscribeEndpoint = "/subscribe"
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flushEndpoint = "/flush"
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statusEndpoit = "/status"
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debugEndpoint = "/debug"
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)
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type (
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Config struct {
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Host string
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Port int
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Timeout time.Duration
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}
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Client struct {
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Config *Config
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httpClient *http.Client
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}
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Message struct {
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Queue string
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Body []byte
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}
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QueueInfo struct {
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Name string
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Messages int
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Subscribers int
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}
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DebugInfo struct {
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Version string `json:"version"`
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Gomaxprocs int `json:"gomaxprocs"`
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Goroutines int `json:"goroutines"`
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KyotoCabinet map[string]interface{} `json:"kyoto_cabinet"`
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}
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)
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func NewConfig() *Config {
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return &Config{
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Host: "127.0.0.1",
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Port: 4401,
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Timeout: 60 * time.Second,
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}
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}
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func NewClient(c *Config) *Client {
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if c == nil {
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c = NewConfig()
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}
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transport := http.Transport{
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Dial: func(network, addr string) (net.Conn, error) {
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return net.DialTimeout(network, addr, c.Timeout)
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},
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}
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client := http.Client{
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Transport: &transport,
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}
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return &Client{
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Config: c,
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httpClient: &client,
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}
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}
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func (c *Client) Publish(m *Message) bool {
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rdr := bytes.NewReader(m.Body)
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url := c.url(publishEndpoint, "?queue=", m.Queue)
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res, err := http.Post(url, "text/plain", rdr)
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if err != nil {
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return false
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}
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defer res.Body.Close()
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body, err := ioutil.ReadAll(res.Body)
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if err != nil {
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return false
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}
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return (string(body) == "OK")
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}
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func (c *Client) Subscribe(queues ...string) *Message {
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url := c.url(subscribeEndpoint, "?queues=", strings.Join(queues, ","))
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head, body := c.get(url)
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return &Message{
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Queue: head.Get("Queue"),
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Body: body,
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}
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}
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func (c *Client) Flush(queues ...string) []*Message {
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url := c.url(flushEndpoint, "?queues=", strings.Join(queues, ","))
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_, body := c.get(url)
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var tmp []map[string]string
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if err := json.Unmarshal(body, &tmp); err != nil {
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return nil
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}
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messages := []*Message{}
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for _, msg := range tmp {
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messages = append(messages, &Message{msg["queue"], []byte(msg["message"])})
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}
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return messages
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}
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func (c *Client) Status() []*QueueInfo {
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url := c.url(statusEndpoit)
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_, body := c.get(url)
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tmp := make(map[string]map[string]int)
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if err := json.Unmarshal(body, &tmp); err != nil {
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return nil
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}
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stat := []*QueueInfo{}
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for queue, info := range tmp {
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qi := &QueueInfo{
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Name: queue,
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Messages: info["messages"],
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Subscribers: info["subscribers"],
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}
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stat = append(stat, qi)
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}
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return stat
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}
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func (c *Client) Debug() *DebugInfo {
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url := c.url(debugEndpoint)
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_, body := c.get(url)
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var dbg DebugInfo
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if err := json.Unmarshal(body, &dbg); err != nil {
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return nil
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}
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return &dbg
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}
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func (c *Client) get(url string) (http.Header, []byte) {
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res, err := http.Get(url)
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if err != nil {
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return nil, nil
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}
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body, err := ioutil.ReadAll(res.Body)
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if err != nil {
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return nil, nil
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}
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res.Body.Close()
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return res.Header, body
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}
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func (c *Client) url(path ...string) string {
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parts := []string{"http://", c.Config.Host, ":", strconv.Itoa(c.Config.Port)}
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parts = append(parts, path...)
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return strings.Join(parts, "")
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}
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