AWS API Gateway请求主体为Java POJO以实现功能 [英] AWS API Gateway request body as Java POJO for function

问题描述

使用aws-lambda，API Gateway和无服务器框架只是一个真正的基本问题.我只想将发布请求的主体作为Java POJO移交.

I was just having a really basic problem using aws-lambda, API Gateway and the serverless framework. I just wanted to hand over the body of a post request as a Java POJO.

好的，这是设置:

POJO:

public class Person {
    private String lastName;
    private string firstName;

    ... Setters and Getters omitted
}

处理程序:

public class PersonHandler implements RequestHandler<Person, ApiGatewayResponse> {
    @Override
    public ApiGatewayResponse handleRequest(lastNamePerson person, Context context) {
        //... do something
     }
}

帖子的请求正文中的有效载荷为

And the payload in the post's request body would be

{
    "lastName" : "John",
    "firstName" : "Doe"
}

最后但并非最不重要的serverless.yml

And, last but not least the serverless.yml

{
...
functions:person
handler:com.serverless.handler
event:
  -http:
    path:person
    method:post
...
}

好吧，看起来很简单，不是吗?

Well, looks pretty straight forward, doesn't it?

不幸的是，这不是那么简单.调用函数时，Person POJO始终为空.我们如何在AWS API Gateway& Lambda?

Unfortunately, it's not that simple. The Person POJO will always be empty when calling the function. How can we give the body as a POJO in AWS API Gateway & Lambda?

推荐答案

好吧，经过长时间的研究和一些猜测，我找到了答案，并决定将其发布在这里，以供将来我(和其他人)使用.

Well, through prolonged research and some guessing I found the answer and decided to post it here for future me (and others) to find.

但是首先，让我们看一下实际问题.身体不会在根中，而是在input.body下，然后杰克逊不知道在哪里可以找到你的人.

But first, let's take a look at the actual problem. The body will not be in the root but under input.body, and then Jackson doesn't know where to find your person.

因此，首先我们需要从lambda-proxy-integration更改为lambda-integration.

So, first we need to change from lambda-proxy-integration to lambda-integration.

然后我们需要告诉集成将主体作为有效载荷移交给函数.

And then we need to tell the integration to hand over the body as payload to the function.

这为我们提供了以下serverless.yml:

This gives us the following serverless.yml:

{
...
functions:person
handler:com.serverless.handler
event:
  -http:
    path:person
    method:post
    integration:lambda
    request:
      template:
        application/json:'$input.body'
...
}

e voila，现在您的POJO将被填充. 希望这会有所帮助，并让我知道是否有人找到了一个更简单或更佳的解决方案.

e voila, now your POJO will be populated. Hope this helps, and let me know if anybody found a simpler or better solution to this.

来源:

https://serverless.com/framework/docs/providers/aws/events/apigateway/#request-templates

无法解析请求正文转换成json:意外字符(\'-\'(代码45))AWS Lambda + API + Postman (用于格式化yml)

Could not parse request body into json: Unexpected character (\'-\' (code 45)) AWS Lambda + API + Postman (for formatting the yml)

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