AWS SNS和SQS的文档包含有关消息属性的部分。但是,当该队列订阅了SNS主题时,没有解释如何获得SQS 消息属性。
有没有办法配置AWS SNS以将特定的消息属性添加到通过订阅发送的SQS消息中?
答案 0 :(得分:7)
在向Amazon SQS发送Amazon SNS消息属性的Using Amazon SNS Message Attributes文档时,似乎属性是在消息的正文中发送的,而不是作为消息属性附加到结果上Amazon SQS消息。
例如,我做了以下事情:
我是通过AWS Command-Line Interface (CLI)发布的:
aws sns publish --topic-arn arn:aws:sns:ap-southeast-2:123456789012:foo --message msg --subject subj --message-attributes '{"somename" : { "DataType":"String", "StringValue":"somevalue"}}'
(我从map datatype in aws cli获得语法帮助)
SQS中显示的消息显示属性作为消息的一部分:
{
"Type" : "Notification",
"MessageId" : "53e3adad-723a-5eae-a7b7-fc0468ec2d37",
"TopicArn" : "arn:aws:sns:ap-southeast-2:123456789012:foo",
"Subject" : "subj",
"Message" : "msg",
"Timestamp" : "2017-05-29T12:48:22.186Z",
...
"MessageAttributes" : {
"somename" : {"Type":"String","Value":"somevalue"}
}
}
如果将这些属性作为官方SQS属性附加到SQS消息,那将会更好。唉,似乎情况并非如此。
答案 1 :(得分:5)
来自aws文档:
要将消息属性与Amazon SQS端点一起使用,必须将订阅属性Raw Message Delivery设置为True。有关原始邮件传递的详细信息,请参阅附录:大型有效负载和原始邮件传递。 https://docs.aws.amazon.com/sns/latest/dg/SNSMessageAttributes.html https://docs.aws.amazon.com/sns/latest/dg/large-payload-raw-message.html
从现实生活中添加了一个例子。希望它有助于澄清事情。 发布到sns主题的消息如下:
aws sns publish --topic-arn arn:aws:sns:us-west-2:xxx:pollution-event --message '{"operatorId":3375001,"eventTypeId":1,"eventLevelId":1,"validFrom":"2018-03-10T09:00:00Z","validTo":"2018-03-11T09:00:00Z"}' --message-attributes '{"Type" : { "DataType":"String", "StringValue":"Orchestration.Services.Model.Pollution.PollutionMessage"}}'
启用原始传递为false(默认)。 sqs收到的消息只包含内容,没有属性
{
"Type": "Notification",
"MessageId": "78d5bc6f-142c-5060-a75c-ef29b774ec66",
"TopicArn": "arn:aws:sns:eu-west-2:xxx:pollution-event",
"Message": "{\"validFrom\": \"2018-03-10T09:00:00Z\",\"validTo\": \"2018-03-11T09:00:00Z\",\"eventLevelId\": 1,\"eventTypeId\": 1,\"operatorId\": 3375001}",
"Timestamp": "2018-04-17T11:33:44.770Z",
"SignatureVersion": "1",
"Signature": "xxx==",
"SigningCertURL": "https://sns.eu-west-2.amazonaws.com/SimpleNotificationService-xxx.pem",
"UnsubscribeURL": "https://sns.eu-west-2.amazonaws.com/?Action=Unsubscribe&SubscriptionArn=arn:aws:sns:eu-west-2:xxx",
"MessageAttributes": {
"Type": {
"Type": "String",
"Value": "Orchestration.Services.Model.Pollution.PollutionMessage"
},
"AWS.SNS.MOBILE.MPNS.Type": {
"Type": "String",
"Value": "token"
},
"AWS.SNS.MOBILE.MPNS.NotificationClass": {
"Type": "String",
"Value": "realtime"
},
"AWS.SNS.MOBILE.WNS.Type": {
"Type": "String",
"Value": "wns/badge"
}
}
}
答案 2 :(得分:0)
在为SNS内的主题添加SQS订阅时启用了原始消息传递类型