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134 lines
3.4 KiB
134 lines
3.4 KiB
/*
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* Minio Cloud Storage, (C) 2018 Minio, Inc.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package target
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import (
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"crypto/tls"
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"crypto/x509"
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"encoding/json"
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"errors"
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"net/url"
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"time"
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"github.com/eclipse/paho.mqtt.golang"
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"github.com/minio/minio/pkg/event"
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xnet "github.com/minio/minio/pkg/net"
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)
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// MQTTArgs - MQTT target arguments.
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type MQTTArgs struct {
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Enable bool `json:"enable"`
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Broker xnet.URL `json:"broker"`
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Topic string `json:"topic"`
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QoS byte `json:"qos"`
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ClientID string `json:"clientId"`
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User string `json:"username"`
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Password string `json:"password"`
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MaxReconnectInterval time.Duration `json:"reconnectInterval"`
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KeepAlive time.Duration `json:"keepAliveInterval"`
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RootCAs *x509.CertPool `json:"-"`
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}
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// Validate MQTTArgs fields
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func (m MQTTArgs) Validate() error {
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if !m.Enable {
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return nil
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}
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u, err := xnet.ParseURL(m.Broker.String())
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if err != nil {
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return err
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}
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switch u.Scheme {
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case "ws", "wss", "tcp", "ssl", "tls", "tcps":
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default:
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return errors.New("unknown protocol in broker address")
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}
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return nil
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}
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// MQTTTarget - MQTT target.
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type MQTTTarget struct {
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id event.TargetID
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args MQTTArgs
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client mqtt.Client
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}
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// ID - returns target ID.
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func (target *MQTTTarget) ID() event.TargetID {
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return target.id
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}
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// Send - sends event to MQTT.
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func (target *MQTTTarget) Send(eventData event.Event) error {
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if !target.client.IsConnected() {
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token := target.client.Connect()
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if token.Wait() {
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if err := token.Error(); err != nil {
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return err
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}
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}
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}
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objectName, err := url.QueryUnescape(eventData.S3.Object.Key)
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if err != nil {
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return err
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}
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key := eventData.S3.Bucket.Name + "/" + objectName
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data, err := json.Marshal(event.Log{EventName: eventData.EventName, Key: key, Records: []event.Event{eventData}})
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if err != nil {
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return err
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}
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token := target.client.Publish(target.args.Topic, target.args.QoS, false, string(data))
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if token.Wait() {
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return token.Error()
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}
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return nil
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}
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// Close - does nothing and available for interface compatibility.
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func (target *MQTTTarget) Close() error {
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return nil
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}
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// NewMQTTTarget - creates new MQTT target.
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func NewMQTTTarget(id string, args MQTTArgs) (*MQTTTarget, error) {
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options := mqtt.NewClientOptions().
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SetClientID(args.ClientID).
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SetCleanSession(true).
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SetUsername(args.User).
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SetPassword(args.Password).
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SetMaxReconnectInterval(args.MaxReconnectInterval).
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SetKeepAlive(args.KeepAlive).
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SetTLSConfig(&tls.Config{RootCAs: args.RootCAs}).
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AddBroker(args.Broker.String())
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client := mqtt.NewClient(options)
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token := client.Connect()
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if token.Wait() && token.Error() != nil {
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return nil, token.Error()
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}
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return &MQTTTarget{
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id: event.TargetID{ID: id, Name: "mqtt"},
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args: args,
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client: client,
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}, nil
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}
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