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initial implementation

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Morgan McMillian 2021-07-02 16:32:03 -07:00
commit 2217d19353
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LICENSE Normal file
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MIT License
Copyright (c) 2021 Morgan McMillian
Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in all
copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
SOFTWARE.

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module git.sr.ht/~thrrgilag/pnut-bridge
go 1.16
require (
git.sr.ht/~thrrgilag/woodstock v0.0.0-20210613221914-3b9e0ef92799
github.com/gorilla/websocket v1.4.2
github.com/smartystreets/goconvey v1.6.4 // indirect
gopkg.in/ini.v1 v1.62.0
)

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go.sum Normal file
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git.sr.ht/~thrrgilag/woodstock v0.0.0-20210613221914-3b9e0ef92799 h1:iiUiZTW7yksLArreiNO1KcAkMmAvmMquz6etgaKzpCU=
git.sr.ht/~thrrgilag/woodstock v0.0.0-20210613221914-3b9e0ef92799/go.mod h1:giZm2mNVkz9BeA31LtUC2gwIYfUSUPQINp+tI8EGFTc=
github.com/gopherjs/gopherjs v0.0.0-20181017120253-0766667cb4d1 h1:EGx4pi6eqNxGaHF6qqu48+N2wcFQ5qg5FXgOdqsJ5d8=
github.com/gopherjs/gopherjs v0.0.0-20181017120253-0766667cb4d1/go.mod h1:wJfORRmW1u3UXTncJ5qlYoELFm8eSnnEO6hX4iZ3EWY=
github.com/gorilla/websocket v1.4.2 h1:+/TMaTYc4QFitKJxsQ7Yye35DkWvkdLcvGKqM+x0Ufc=
github.com/gorilla/websocket v1.4.2/go.mod h1:YR8l580nyteQvAITg2hZ9XVh4b55+EU/adAjf1fMHhE=
github.com/jtolds/gls v4.20.0+incompatible h1:xdiiI2gbIgH/gLH7ADydsJ1uDOEzR8yvV7C0MuV77Wo=
github.com/jtolds/gls v4.20.0+incompatible/go.mod h1:QJZ7F/aHp+rZTRtaJ1ow/lLfFfVYBRgL+9YlvaHOwJU=
github.com/smartystreets/assertions v0.0.0-20180927180507-b2de0cb4f26d h1:zE9ykElWQ6/NYmHa3jpm/yHnI4xSofP+UP6SpjHcSeM=
github.com/smartystreets/assertions v0.0.0-20180927180507-b2de0cb4f26d/go.mod h1:OnSkiWE9lh6wB0YB77sQom3nweQdgAjqCqsofrRNTgc=
github.com/smartystreets/goconvey v1.6.4 h1:fv0U8FUIMPNf1L9lnHLvLhgicrIVChEkdzIKYqbNC9s=
github.com/smartystreets/goconvey v1.6.4/go.mod h1:syvi0/a8iFYH4r/RixwvyeAJjdLS9QV7WQ/tjFTllLA=
golang.org/x/crypto v0.0.0-20190308221718-c2843e01d9a2/go.mod h1:djNgcEr1/C05ACkg1iLfiJU5Ep61QUkGW8qpdssI0+w=
golang.org/x/net v0.0.0-20190311183353-d8887717615a/go.mod h1:t9HGtf8HONx5eT2rtn7q6eTqICYqUVnKs3thJo3Qplg=
golang.org/x/sys v0.0.0-20190215142949-d0b11bdaac8a/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
golang.org/x/text v0.3.0/go.mod h1:NqM8EUOU14njkJ3fqMW+pc6Ldnwhi/IjpwHt7yyuwOQ=
golang.org/x/tools v0.0.0-20190328211700-ab21143f2384/go.mod h1:LCzVGOaR6xXOjkQ3onu1FJEFr0SW1gC7cKk1uF8kGRs=
gopkg.in/ini.v1 v1.62.0 h1:duBzk771uxoUuOlyRLkHsygud9+5lrlGjdFBb4mSKDU=
gopkg.in/ini.v1 v1.62.0/go.mod h1:pNLf8WUiyNEtQjuu5G5vTm06TEv9tsIgeAvK8hOrP4k=

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package main
import (
"bytes"
"encoding/json"
"flag"
"io/ioutil"
"log"
"net/http"
"net/url"
"os"
"time"
"git.sr.ht/~thrrgilag/woodstock"
"github.com/gorilla/websocket"
"gopkg.in/ini.v1"
)
var cfgfile *string
var done chan interface{}
var interrupt chan os.Signal
type Config struct {
PnutAccessToken string `ini:"pnut_access_token"`
PnutUsername string `ini:"pnut_username"`
MbUrl string `ini:"matterbridge_url"`
MbToken string `ini:"matterbridge_token"`
Rooms []Room
}
type Room struct {
ChannelID string `ini:"pnut_channel"`
Gateway string `ini:"gateway"`
}
type Meta struct {
Timestamp int `json:"timestamp"`
Id string `json:"id"`
ChannelType string `json:"channel_type"`
SubscriptionIds []string `json:"subscription_ids"`
Stream Stream `json:"stream"`
ConnectionId string `json:"connection_id"`
}
type Stream struct {
Endpoint string `json:"endpoint"`
}
type Msg struct {
Meta Meta `json:"meta"`
}
type Messages struct {
Meta Meta `json:"meta"`
Data []woodstock.Message `json:"data"`
}
type MbMessage struct {
Text string `json:"text"`
Channel string `json:"channel"`
Username string `json:"username"`
UserID string `json:"userid"`
Avatar string `json:"avatar"`
Account string `json:"account"`
Event string `json:"event"`
Protocol string `json:"protocol"`
Gateway string `json:"gateway"`
ParentID string `json:"parent_id"`
Timestamp string `json:"timestamp"`
ID string `json:"id"`
Extra MbExtra `json"extra"`
}
type MbExtra struct {
File []MbFile `json:"file"`
}
type MbFile struct {
Name string `json:"name"`
Data string `json:"data"`
Comment string `json:"comment"`
URL string `json:"url"`
Size int `json:"size"`
Avatar bool `json:"avatar"`
SHA string `json:"sha"`
}
type MbOutMsg struct {
Text string `json:"text"`
Username string `json:"username"`
Gateway string `json:"gateway"`
}
type PnutOembed struct {
Version string `json:"version"`
Type string `json:"type"`
Title string `json:"title"`
Url string `json:"url"`
}
func subscribe(connection_id string, access_token string, rooms []Room) {
params := url.Values{}
params.Set("connection_id", connection_id)
for _, _room := range rooms {
log.Printf(">> connecting channel %s ...", _room.ChannelID)
url := "https://api.pnut.io/v1/channels/" + _room.ChannelID + "/messages?" + params.Encode()
req, err := http.NewRequest("GET", url, nil)
if err != nil {
log.Println("!! unable to create request", err)
}
req.Header.Set("User-Agent", "pnut-bridge")
req.Header.Add("Authorization", "Bearer "+access_token)
client := &http.Client{}
resp, err := client.Do(req)
if err != nil {
log.Println("!! error on reponse", err)
}
defer resp.Body.Close()
log.Printf("<< %s", resp.Status)
//body, _ := ioutil.ReadAll(resp.Body)
//log.Println(string([]byte(body)))
}
}
func receiveHandler(connection *websocket.Conn, conf *Config) {
defer close(done)
for {
_, msg, err := connection.ReadMessage()
if err != nil {
log.Println("!! error in websocket receive:", err)
return
}
log.Printf("<< received: %s", msg)
var m Msg
if err := json.Unmarshal(msg, &m); err != nil {
log.Println("!! error unmarshaling msg", err)
}
if len(m.Meta.ConnectionId) > 0 {
log.Println("<< connection", m.Meta.ConnectionId)
subscribe(m.Meta.ConnectionId, conf.PnutAccessToken, conf.Rooms)
continue
}
switch m.Meta.ChannelType {
case "io.pnut.core.chat":
var messages Messages
if err := json.Unmarshal(msg, &messages); err != nil {
log.Println("!! error unmarshaling message objects", err)
}
for _, _message := range messages.Data {
pnutMsgHandler(conf, _message)
}
default:
}
}
}
func pnutMsgHandler(conf *Config, msg woodstock.Message) {
gateway := getRoomGateway(conf.Rooms, msg.ChannelID)
if len(gateway) < 1 {
return
}
if msg.User.Username == conf.PnutUsername {
return
}
log.Printf(">> sending message from channel %s to %s ...", msg.ChannelID, gateway)
data := MbOutMsg{
Text: msg.Content.Text,
Username: msg.User.Username,
Gateway: gateway,
}
jsonStr, err := json.Marshal(data)
if err != nil {
log.Println("!! there is a problem creating json string", err)
return
}
url := conf.MbUrl + "/api/message"
req, err := http.NewRequest("POST", url, bytes.NewBuffer(jsonStr))
if err != nil {
log.Println("!! unable to create request", err)
}
req.Header.Set("User-Agent", "pnut-bridge")
req.Header.Set("Content-Type", "application/json; charset=UTF-8")
req.Header.Add("Authorization", "Bearer "+conf.MbToken)
client := &http.Client{}
resp, err := client.Do(req)
if err != nil {
log.Println("!! error on reponse", err)
}
defer resp.Body.Close()
log.Printf("<< %s", resp.Status)
//body, _ := ioutil.ReadAll(resp.Body)
//log.Println(string([]byte(body)))
}
func getRoomGateway(rooms []Room, chan_id string) string {
for _, v := range rooms {
if v.ChannelID == chan_id {
return v.Gateway
}
}
return ""
}
func bridgeMsgHandler(conf *Config, msg MbMessage) {
client := woodstock.NewClient("", "")
client.SetAccessToken(conf.PnutAccessToken)
channel_id := getPnutChannel(conf.Rooms, msg.Gateway)
text := msg.Username + " " + msg.Text
for _, file := range msg.Extra.File {
text = text + "\n" + file.URL
// log.Println("name, ", file.Name)
// log.Println("url, ", file.URL)
// fdata, err := base64.StdEncoding.DecodeString(file.Data)
// if err != nil {
// log.Println("!! error decoding file", err)
// }
// mtype := mimetype.Detect(fdata)
// log.Println("type, ", mtype)
// if strings.HasPrefix(mtype, "image") {
// oembed := PnutOembed{
// Version: "1.0",
// Type: "photo",
// Title: file.Name,
// Url: file.URL,
// }
// // TODO finish this when woodstock is fixed
// }
}
log.Printf(">> sending message from %s to channel %s ...", msg.Gateway, channel_id)
_, err := client.CreateMessage(channel_id, text)
if err != nil {
log.Println("!! problem posting message to pnut.io", err)
}
log.Println("<< ok")
}
func getPnutChannel(rooms []Room, gateway string) string {
for _, v := range rooms {
if v.Gateway == gateway {
return v.ChannelID
}
}
return ""
}
func init() {
cfgfile = flag.String("c", "config.ini", "config file")
}
func main() {
flag.Parse()
done = make(chan interface{})
interrupt = make(chan os.Signal)
conf := new(Config)
file, err := ini.Load(*cfgfile)
if err != nil {
log.Printf("!! there was a problem loading the config: %v", err)
os.Exit(1)
}
var rooms []Room
for _, _sec := range file.SectionStrings() {
if _sec == "DEFAULT" {
err = file.Section("DEFAULT").MapTo(conf)
if err != nil {
log.Println("!! unable to map default config section", err)
}
} else {
room := new(Room)
err = file.Section(_sec).MapTo(room)
if err != nil {
log.Printf("!! unable to map config section %s: %v", _sec, err)
}
rooms = append(rooms, *room)
}
}
conf.Rooms = rooms
params := url.Values{}
params.Set("access_token", conf.PnutAccessToken)
socketUrl := "wss://stream.pnut.io/v1/user?" + params.Encode()
conn, _, err := websocket.DefaultDialer.Dial(socketUrl, nil)
if err != nil {
log.Fatal("!! error connectiong to pnut.io:", err)
}
defer conn.Close()
go receiveHandler(conn, conf)
for {
select {
case <-time.After(time.Duration(1) * time.Millisecond * 1000):
err := conn.WriteMessage(websocket.TextMessage, []byte("."))
if err != nil {
log.Println("!! error during write to websocket:", err)
return
}
url := conf.MbUrl + "/api/messages"
req, err := http.NewRequest("GET", url, nil)
if err != nil {
log.Println("!! unable to create request", err)
}
req.Header.Set("User-Agent", "pnut-bridge")
req.Header.Add("Authorization", "Bearer "+conf.MbToken)
client := &http.Client{}
resp, err := client.Do(req)
if err != nil {
log.Println(">> error on reponse", err)
}
defer resp.Body.Close()
body, _ := ioutil.ReadAll(resp.Body)
//log.Println("<< ", string([]byte(body)))
var m []MbMessage
jerr := json.Unmarshal(body, &m)
if jerr != nil {
log.Println("Error unmarshaling msg", jerr)
}
if len(m) > 0 {
for _, _m := range m {
bridgeMsgHandler(conf, _m)
}
}
case <-interrupt:
log.Println("Received SIGINT.")
err := conn.WriteMessage(websocket.CloseMessage, websocket.FormatCloseMessage(websocket.CloseNormalClosure, ""))
if err != nil {
log.Println("Error during closing websocket:", err)
return
}
select {
case <-done:
log.Println("Receiver Channel Closed! Exiting...")
case <-time.After(time.Duration(1) * time.Second):
log.Println("Timeout in closing receiving channel. Exiting...")
}
return
}
}
}