proxys3.4.yml

    ApiGatewayResourceItem:
      Type: AWS::ApiGateway::Resource
      Properties:
        ParentId: 
          Fn::GetAtt: [ApiGatewayRestApi, RootResourceId]
        PathPart: '{item}'
        RestApiId:  !Ref ApiGatewayRestApi
    ApiGatewayMethodGetItem:
      Type: AWS::ApiGateway::Method
      Description: Located at {item} resource to get items from S3 bucket
      Properties:
        HttpMethod: GET
        ResourceId: !Ref ApiGatewayResourceItem
        RestApiId: !Ref ApiGatewayRestApi
        ApiKeyRequired: false
        AuthorizationType: NONE
        RequestParameters:
          method.request.path.item: true
          method.request.header.Content-Disposition: false
          method.request.header.Content-Type: false
        MethodResponses:
          - ResponseParameters:
              method.response.header.Content-Disposition: true
              method.response.header.Content-Type: true
            StatusCode: 200
        Integration:
          RequestParameters: 
            integration.request.path.item: method.request.path.item
            integration.request.header.Content-Disposition: method.request.header.Content-Disposition
            integration.request.header.Content-Type: method.request.header.Content-Type

          IntegrationHttpMethod: GET
          Type: AWS
          Uri:
            Fn::Join: ['',['arn:aws:apigateway:us-east-1:s3:', 'path/', !Ref SwaggerSite, '/{item}']]
          Credentials:
            Fn::GetAtt: [GatewayRole, Arn]
          IntegrationResponses:
            - StatusCode: 200
              SelectionPattern: 200
              ResponseParameters:
                method.response.header.Content-Disposition: integration.response.header.Content-Disposition
                method.response.header.Content-Type: integration.response.header.Content-Type