aws_api_gateway_integration.tf

resource "aws_api_gateway_integration" "options" {
  connection_type      = "INTERNET"
  http_method          = "OPTIONS"
  passthrough_behavior = "WHEN_NO_MATCH"
  rest_api_id          = aws_api_gateway_rest_api.default.id
  resource_id          = aws_api_gateway_resource.resource.id
  timeout_milliseconds = "29000"
  type                 = "MOCK"

  request_templates = {
    "application/json" = "{\"statusCode\": 200}"
  }
}

resource "aws_api_gateway_integration" "post" {
  connection_type         = "INTERNET"
  content_handling        = "CONVERT_TO_TEXT"
  http_method             = aws_api_gateway_method.post.http_method
  integration_http_method = aws_api_gateway_method.post.http_method
  passthrough_behavior    = "WHEN_NO_MATCH"
  rest_api_id             = aws_api_gateway_rest_api.default.id
  resource_id             = aws_api_gateway_resource.resource.id
  timeout_milliseconds    = "29000"
  type                    = "AWS_PROXY"
  uri                     = "arn:aws:apigateway:${var.aws_region}:lambda:path/2015-03-31/functions/arn:aws:lambda:${var.aws_region}:${var.aws_account_id}:function:${var.lambda_function_name}/invocations"
}