AWS Api gateway write to S3 with timestamp as filename - amazon-web-services

Question

I'm trying to create an endpoint on Api Gateway that writes on AWS s3 bucket using a filename like data/$timestamp where timestamp is the $context.requestTimeEpoch variable that should be available in each request
My api gateway request integration is this
{
"type": "AWS",
"httpMethod": "PUT",
"uri": "arn:aws:apigateway:eu-west-1:bucketname.s3:path/data/{reqTimestamp}",
"credentials": "arn:aws:iam::xxxxx:role/ApiGatewayWriteToDemoS3Bucket",
"requestParameters": {
"integration.request.path.reqTimestamp": "context.requestTime"
},
"passthroughBehavior": "WHEN_NO_MATCH",
"timeoutInMillis": 29000,
"cacheNamespace": "5f92eajcg9",
"cacheKeyParameters": [],
"integrationResponses": {
"200": {
"statusCode": "200",
"responseParameters": {
"method.response.header.Access-Control-Allow-Origin": "'*'"
},
"responseTemplates": {
"application/json": null
}
}
}
}
However I get this error
Execution failed due to configuration error: Illegal character in path at index 49: https://bucketname.s3-eu-west-1.amazonaws.com/data/{reqTimestamp}
it worked only once, then I had an S3 authentication error but that's another story

Answer 1

You need to add a value in the URL Path Parameter configuration of the Integration Request in your API Gateway resource method, setting the name to reqTimestamp, and value to method.request.path.reqTimestamp.
This will map the value received by API Gateway in the URL to the path override parameter you defined.