Add JSON object in Body of API Gateway to Kinesis proxy? - amazon-web-services

Question

I have configured API gateway as a Kinesis proxy as described in Amazon’s tutorial for putting record into Kinesis stream.
The HTTP headers for integration request are:
stream-name is mapped to method.request.header.stream-name
partition-key is mapped to method.request.header.partition-key
Content-Type is mapped to application/x-amz-json-1.1
The body mapping template for content-type application/json looks like:
{
"StreamName": "$input.params('stream-name')",
"PartitionKey": "$input.params('partition-key')",
"Data": "$util.base64Encode({"rows": "$input.json('$')", "uuid": "$input.params('uuid')"})"
}
The data comes in as a JSON-request payload. We should add a uuid parameter as a JSON-object key into the data-payload for Kinesis, but the encoded data being sent to Kinesis isn’t a JSON object.
It is required to add a parameter uuid as a json-object key into the data-payload for kinesis. The problem I am facing is, that encoded data sent to kinesis is not a JSON object.
The data I expect to be sent to Kinesis should be a JSON object:
{
"rows": [{"id": 1, "name": "a"}, {"id": 2, "name": "b"}],
"uuid": "0001"
}
But the actual data sent to Kinesis looks like:
{
rows=[{"id": 1, "name": "a"}, {"id": 2, "name": "b"}],
uuid=0001
}
How can I send a JSON object from API gateway to Kinesis? I have been experimenting with $util.parseJson but couldn't find a solution for this scenario.

Answer 1

You need to escape double quotes in velocity templates
#set($event = "{
""rows"": ""$input.json('$')"",
""uuid"": ""$input.params('uuid')"",
}")
{
"StreamName": "$input.params('stream-name')",
"Data": "$util.base64Encode($event)",
"PartitionKey": "$input.params('partition-key')"
}
Here is a similar question on the aws forums for sending data to kinesis through api gateway https://forums.aws.amazon.com/thread.jspa?threadID=233060