的结果get_body()
返回 JSON 格式的字符串。
我通过创建 SQS 队列和 SNS 通知主题重新创建了您的情况,将 SQS 队列订阅到 SNS 主题,然后创建了一个将通知推送到 SNS 主题的警报。然后我触发了警报情况并通过 Python 检索了结果:
$ python
Python 2.6.9 (unknown, Sep 13 2014, 00:25:11)
[GCC 4.8.2 20140120 (Red Hat 4.8.2-16)] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>> import boto, boto.sqs
>>> from boto.sqs.message import Message
>>> q_conn = boto.sqs.connect_to_region("ap-southeast-2")
>>> q = q_conn.get_queue('bob')
>>> m = q.read(visibility_timeout=15)
>>> m.get_body()
u'{\n "Type" : "Notification",\n "MessageId" : "adcad528-680b-5b4f-88bd-98432f1bf252",\n "TopicArn" : "arn:aws:sns:ap-southeast-2:123412341234:bob-topic",\n "Subject" : "ALARM: \\"my-alarm-name\\" in APAC - Sydney",\n "Message" : "{\\"AlarmName\\":\\"my-alarm-name\\",\\"AlarmDescription\\":\\"my-alarm-description\\",\\"AWSAccountId\\":\\"123412341234\\",\\"NewStateValue\\":\\"ALARM\\",\\"NewStateReason\\":\\"Threshold Crossed: 1 datapoint (1459.0) was greater than or equal to the threshold (0.0).\\",\\"StateChangeTime\\":\\"2015-01-11T00:33:20.013+0000\\",\\"Region\\":\\"APAC - Sydney\\",\\"OldStateValue\\":\\"INSUFFICIENT_DATA\\",\\"Trigger\\":{\\"MetricName\\":\\"NetworkIn\\",\\"Namespace\\":\\"AWS/EC2\\",\\"Statistic\\":\\"SUM\\",\\"Unit\\":null,\\"Dimensions\\":[{\\"name\\":\\"InstanceId\\",\\"value\\":\\"i-af41ec91\\"}],\\"Period\\":60,\\"EvaluationPeriods\\":1,\\"ComparisonOperator\\":\\"GreaterThanOrEqualToThreshold\\",\\"Threshold\\":0.0}}",\n "Timestamp" : "2015-01-11T00:33:20.072Z",\n "SignatureVersion" : "1",\n "Signature" : "(removed)",\n "SigningCertURL" : "(removed)",\n "UnsubscribeURL" : "https://sns.ap-southeast-2.amazonaws.com/?Action=Unsubscribe&SubscriptionArn=arn:aws:sns:ap-southeast-2:123412341234:bob-topic:9bc1234c-1234-4995-927a-72b752866e5e"\n}'
响应get_body()
是一个包含 JSON 的字符串。这可以使用 JSON 库进行解析:
>>> message_string = json.loads(m.get_body())['Message']
>>> message_string
u'{"AlarmName":"my-alarm-name","AlarmDescription":"my-alarm-description","AWSAccountId":"123412341234","NewStateValue":"ALARM","NewStateReason":"Threshold Crossed: 1 datapoint (1459.0) was greater than or equal to the threshold (0.0).","StateChangeTime":"2015-01-11T00:33:20.013+0000","Region":"APAC - Sydney","OldStateValue":"INSUFFICIENT_DATA","Trigger":{"MetricName":"NetworkIn","Namespace":"AWS/EC2","Statistic":"SUM","Unit":null,"Dimensions":[{"name":"InstanceId","value":"i-af41ec91"}],"Period":60,"EvaluationPeriods":1,"ComparisonOperator":"GreaterThanOrEqualToThreshold","Threshold":0.0}}'
>>> message = json.loads(message_string)
>>> message['AlarmName']
u'my-alarm-name'