amazon-web-services - 序列化异常:Start of structure or map found where not expected: API Gateway to Step function

Question

我正在使用标准博客教程将 api 网关与此处的步骤函数集成: https://docs.aws.amazon.com/step-functions/latest/dg/tutorial-api-gateway.html

我的步骤函数需要以下输出:

{
  "my_params": {
     "config": "config_value"
  }
}

博客中提到的执行发布请求所需的请求正文是:

{
 "input": "{}",
   "name": "MyExecution",
   "stateMachineArn": "arn:aws:states:us-east-1:123456789012:stateMachine:HelloWorld"
}

我正在传递所需的输入，如下所示:

{
 "input": {
           "my_params": {
             "config": "config_value"
             }
          },
  "name": "MyExecution",
  "stateMachineArn": "my-arn"
}

但是，我不断收到以下错误:

{
"__type": "com.amazon.coral.service#SerializationException",
  "Message": "Start of structure or map found where not expected."
}

有人能告诉我这里到底出了什么问题吗？我在这里做错了什么？感谢快速帮助。

Answer 1

对参数使用转义字符，如下所示

{
 "input": "{
           \"my_params\": {
             \"config\": \"config_value\"
             }
          }",
  "name": "MyExecution",
  "stateMachineArn": "my-arn"
}