121 lines
2.9 KiB
Go
121 lines
2.9 KiB
Go
/*
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Copyright 2021 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 sns
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import (
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"context"
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"encoding/json"
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"fmt"
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"github.com/aws/aws-sdk-go/service/sns"
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"github.com/dapr/components-contrib/bindings"
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awsAuth "github.com/dapr/components-contrib/internal/authentication/aws"
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"github.com/dapr/kit/logger"
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)
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// AWSSNS is an AWS SNS binding.
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type AWSSNS struct {
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client *sns.SNS
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topicARN string
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logger logger.Logger
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}
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type snsMetadata struct {
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TopicArn string `json:"topicArn"`
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Region string `json:"region"`
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Endpoint string `json:"endpoint"`
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AccessKey string `json:"accessKey"`
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SecretKey string `json:"secretKey"`
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SessionToken string `json:"sessionToken"`
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}
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type dataPayload struct {
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Message interface{} `json:"message"`
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Subject interface{} `json:"subject"`
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}
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// NewAWSSNS creates a new AWSSNS binding instance.
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func NewAWSSNS(logger logger.Logger) bindings.OutputBinding {
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return &AWSSNS{logger: logger}
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}
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// Init does metadata parsing.
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func (a *AWSSNS) Init(_ context.Context, metadata bindings.Metadata) error {
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m, err := a.parseMetadata(metadata)
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if err != nil {
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return err
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}
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client, err := a.getClient(m)
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if err != nil {
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return err
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}
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a.client = client
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a.topicARN = m.TopicArn
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return nil
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}
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func (a *AWSSNS) parseMetadata(metadata bindings.Metadata) (*snsMetadata, error) {
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b, err := json.Marshal(metadata.Properties)
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if err != nil {
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return nil, err
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}
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var m snsMetadata
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err = json.Unmarshal(b, &m)
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if err != nil {
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return nil, err
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}
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return &m, nil
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}
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func (a *AWSSNS) getClient(metadata *snsMetadata) (*sns.SNS, error) {
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sess, err := awsAuth.GetClient(metadata.AccessKey, metadata.SecretKey, metadata.SessionToken, metadata.Region, metadata.Endpoint)
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if err != nil {
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return nil, err
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}
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c := sns.New(sess)
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return c, nil
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}
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func (a *AWSSNS) Operations() []bindings.OperationKind {
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return []bindings.OperationKind{bindings.CreateOperation}
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}
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func (a *AWSSNS) Invoke(ctx context.Context, req *bindings.InvokeRequest) (*bindings.InvokeResponse, error) {
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var payload dataPayload
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err := json.Unmarshal(req.Data, &payload)
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if err != nil {
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return nil, err
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}
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msg := fmt.Sprintf("%v", payload.Message)
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subject := fmt.Sprintf("%v", payload.Subject)
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_, err = a.client.PublishWithContext(ctx, &sns.PublishInput{
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Message: &msg,
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Subject: &subject,
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TopicArn: &a.topicARN,
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})
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if err != nil {
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return nil, err
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}
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return nil, nil
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}
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