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Copy pathmqtt.go
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117 lines (101 loc) · 3.09 KB
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/*
* Minio Cloud Storage, (C) 2018 Minio, Inc.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package target
import (
"crypto/tls"
"crypto/x509"
"encoding/json"
"net/url"
"time"
"github.com/eclipse/paho.mqtt.golang"
"github.com/minio/minio/pkg/event"
xnet "github.com/minio/minio/pkg/net"
)
// MQTTArgs - MQTT target arguments.
type MQTTArgs struct {
Enable bool `json:"enable"`
Broker xnet.URL `json:"broker"`
Topic string `json:"topic"`
QoS byte `json:"qos"`
ClientID string `json:"clientId"`
User string `json:"username"`
Password string `json:"password"`
MaxReconnectInterval time.Duration `json:"reconnectInterval"`
KeepAlive time.Duration `json:"keepAliveInterval"`
RootCAs *x509.CertPool `json:"-"`
}
// MQTTTarget - MQTT target.
type MQTTTarget struct {
id event.TargetID
args MQTTArgs
client mqtt.Client
}
// ID - returns target ID.
func (target *MQTTTarget) ID() event.TargetID {
return target.id
}
// Send - sends event to MQTT.
func (target *MQTTTarget) Send(eventData event.Event) error {
if !target.client.IsConnected() {
token := target.client.Connect()
if token.Wait() {
if err := token.Error(); err != nil {
return err
}
}
}
objectName, err := url.QueryUnescape(eventData.S3.Object.Key)
if err != nil {
return err
}
key := eventData.S3.Bucket.Name + "/" + objectName
data, err := json.Marshal(event.Log{eventData.EventName, key, []event.Event{eventData}})
if err != nil {
return err
}
token := target.client.Publish(target.args.Topic, target.args.QoS, false, string(data))
if token.Wait() {
return token.Error()
}
return nil
}
// Close - does nothing and available for interface compatibility.
func (target *MQTTTarget) Close() error {
return nil
}
// NewMQTTTarget - creates new MQTT target.
func NewMQTTTarget(id string, args MQTTArgs) (*MQTTTarget, error) {
options := &mqtt.ClientOptions{
ClientID: args.ClientID,
CleanSession: true,
Username: args.User,
Password: args.Password,
MaxReconnectInterval: args.MaxReconnectInterval,
KeepAlive: args.KeepAlive,
TLSConfig: tls.Config{RootCAs: args.RootCAs},
}
options.AddBroker(args.Broker.String())
client := mqtt.NewClient(options)
token := client.Connect()
if token.Wait() && token.Error() != nil {
return nil, token.Error()
}
return &MQTTTarget{
id: event.TargetID{id, "mqtt"},
args: args,
client: client,
}, nil
}