APIGatewayProxyRequest queryStringParameters does not support multiple parameter values

[thoellrich]

The URL in go's standard http.Request has a Query() accessor which returns a map[string][]string (see: https://github.com/golang/go/blob/master/src/net/url/url.go#L995). This allows one to send a request with ...&type=foo&type=bar... and get both values using http.Request.Query()["type"].

The QueryStringParameters field from APIGatewayProxyRequest on the other hand is defined as a map[string]string (see: https://github.com/aws/aws-lambda-go/blob/master/events/apigw.go#L11). Supplying ...&type=foo&type=bar... to a Lambda behind GatewayProxy only returns the last value for type - bar in this case.

A workaround is to supply the parameters as a list using a separator character as in: ...&type=foo,bar...

[fsenart]

Hi @thoellrich
This limitation comes from Amazon API Gateway, and this project only reflects this fact. You should ask for a feature request on the AWS forum.

[thoellrich]

Ok - will do. Thanks.

[brydavis]

Does anyone have a great example(s) for using query strings? Thanks