83 lines
2.2 KiB
Go
83 lines
2.2 KiB
Go
/*
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Copyright 2023 The Dapr Authors
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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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http://www.apache.org/licenses/LICENSE-2.0
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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 mqtt
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import (
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"errors"
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"fmt"
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"time"
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"github.com/dapr/components-contrib/pubsub"
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"github.com/dapr/kit/logger"
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kitmd "github.com/dapr/kit/metadata"
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)
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type mqttMetadata struct {
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pubsub.TLSProperties `mapstructure:",squash"`
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URL string `mapstructure:"url"`
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ConsumerID string `mapstructure:"consumerID" mdignore:"true"`
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Qos byte `mapstructure:"qos"`
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Retain bool `mapstructure:"retain"`
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CleanSession bool `mapstructure:"cleanSession"`
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}
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const (
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// Keys
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mqttURL = "url"
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mqttQOS = "qos"
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mqttRetain = "retain"
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mqttConsumerID = "consumerID"
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mqttCleanSession = "cleanSession"
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// Defaults
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defaultQOS = 1
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defaultRetain = false
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defaultWait = 20 * time.Second
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defaultCleanSession = false
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)
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func parseMQTTMetaData(md pubsub.Metadata, log logger.Logger) (*mqttMetadata, error) {
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m := mqttMetadata{
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Qos: defaultQOS,
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CleanSession: defaultCleanSession,
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}
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err := kitmd.DecodeMetadata(md.Properties, &m)
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if err != nil {
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return &m, fmt.Errorf("mqtt pubsub error: %w", err)
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}
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// required configuration settings
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if m.URL == "" {
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return &m, errors.New("missing url")
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}
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// optional configuration settings
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if m.Qos > 7 { // bytes cannot be less than 0
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return &m, fmt.Errorf("invalid qos %d: %w", m.Qos, err)
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}
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// Note: the runtime sets the default value to the Dapr app ID if empty
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if m.ConsumerID == "" {
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return &m, errors.New("missing consumerID")
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}
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m.TLSProperties, err = pubsub.TLS(md.Properties)
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if err != nil {
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return &m, fmt.Errorf("invalid TLS configuration: %w", err)
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}
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return &m, nil
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}
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