122 lines
2.8 KiB
Go
122 lines
2.8 KiB
Go
//Package matterhook provides interaction with mattermost incoming/outgoing webhooks
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package matterhook
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import (
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"bytes"
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"encoding/json"
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"fmt"
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"github.com/gorilla/schema"
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"io"
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"io/ioutil"
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"log"
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"net/http"
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"strconv"
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)
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// OMessage for mattermost incoming webhook. (send to mattermost)
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type OMessage struct {
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Channel string `json:"channel,omitempty"`
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IconURL string `json:"icon_url,omitempty"`
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IconEmoji string `json:"icon_emoji,omitempty"`
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UserName string `json:"username,omitempty"`
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Text string `json:"text"`
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}
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// IMessage for mattermost outgoing webhook. (received from mattermost)
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type IMessage struct {
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Token string `schema:"token"`
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TeamID string `schema:"team_id"`
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TeamDomain string `schema:"team_domain"`
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ChannelID string `schema:"channel_id"`
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ServiceID string `schema:"service_id"`
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ChannelName string `schema:"channel_name"`
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Timestamp string `schema:"timestamp"`
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UserID string `schema:"user_id"`
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UserName string `schema:"user_name"`
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Text string `schema:"text"`
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TriggerWord string `schema:"trigger_word"`
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}
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// Client for Mattermost.
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type Client struct {
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url string
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In chan IMessage
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Out chan OMessage
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Config
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}
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type Config struct {
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Port int
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}
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// New Mattermost client.
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func New(url string, config Config) *Client {
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c := &Client{url: url, In: make(chan IMessage), Out: make(chan OMessage), Config: config}
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if c.Port == 0 {
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c.Port = 9999
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}
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go c.StartServer()
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return c
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}
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// StartServer starts a webserver listening for incoming mattermost POSTS.
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func (c *Client) StartServer() {
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mux := http.NewServeMux()
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mux.Handle("/", c)
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log.Printf("Listening on http://0.0.0.0:%v...\n", c.Port)
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if err := http.ListenAndServe((":" + strconv.Itoa(c.Port)), mux); err != nil {
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log.Fatal(err)
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}
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}
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// ServeHTTP implementation.
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func (c *Client) ServeHTTP(w http.ResponseWriter, r *http.Request) {
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msg := IMessage{}
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err := r.ParseForm()
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if err != nil {
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log.Println(err)
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http.NotFound(w, r)
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return
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}
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defer r.Body.Close()
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decoder := schema.NewDecoder()
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err = decoder.Decode(&msg, r.PostForm)
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if err != nil {
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log.Println(err)
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http.NotFound(w, r)
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return
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}
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c.In <- msg
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}
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// Receive returns an incoming message from mattermost outgoing webhooks URL.
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func (c *Client) Receive() IMessage {
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for {
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select {
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case msg := <-c.In:
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return msg
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}
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}
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}
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// Send sends a msg to mattermost incoming webhooks URL.
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func (c *Client) Send(msg OMessage) error {
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buf, err := json.Marshal(msg)
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if err != nil {
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return err
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}
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resp, err := http.Post(c.url, "application/json", bytes.NewReader(buf))
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if err != nil {
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return err
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}
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defer resp.Body.Close()
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// Read entire body to completion to re-use keep-alive connections.
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io.Copy(ioutil.Discard, resp.Body)
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if resp.StatusCode != 200 {
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return fmt.Errorf("unexpected status code: %d", resp.StatusCode)
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}
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return nil
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}
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