AWS API Gateway错误响应会生成502"Bad Gateway"(错误网关)，并返回到“ [英] AWS API Gateway error response generates 502 "Bad Gateway"

问题描述

我有一个具有LAMBDA_PROXY集成请求类型的API网关.在Lambda中调用context.succeed时，响应头将按预期的代码302发送回去(如下所示).但是，我要处理500和404错误，到目前为止，我唯一能确定的就是，在获取502 Bad Gateway时我错误地返回了错误.我的context.fail怎么了?

I have an API Gateway with a LAMBDA_PROXY Integration Request Type. Upon calling context.succeed in the Lambda, the response header is sent back with code 302 as expected (shown below). However, I want to handle 500 and 404 errors, and the only thing I am sure about so far, is that I am returning the error incorrectly as I am getting 502 Bad Gateway. What is wrong with my context.fail?

这是我的handler.js

const handler = (event, context) => { 
    //event consists of hard coded values right now
    getUrl(event.queryStringParameters)
    .then((result) => {
        const parsed = JSON.parse(result);
        let url;
        //handle error message returned in response
        if (parsed.error) {
            let error = {
                statusCode: 404,
                body: new Error(parsed.error)
            }
            return context.fail(error);
        } else {
            url = parsed.source || parsed.picture;
            return context.succeed({
                statusCode: 302,
                headers: {
                  Location : url
                }
              });
        }
    });
};

推荐答案

如果您在Lambda函数(或context.fail)中引发异常，API网关将读取该异常，好像后端出了点问题，并返回502.如果这是您期望的运行时异常，并且想要返回500/404，请使用context.succeed方法以及所需的状态代码和消息:

If you throw an exception within the Lambda function (or context.fail), API Gateway reads it as if something had gone wrong with your backend and returns 502. If this is a runtime exception you expect and want to return a 500/404, use the context.succeed method with the status code you want and message:

if (parsed.error) {
  let error = {
    statusCode: 404,
    headers: { "Content-Type": "text/plain" } // not sure here
    body: new Error(parsed.error)
}
return context.succeed(error);

这篇关于AWS API Gateway错误响应会生成502"Bad Gateway"(错误网关)，并返回到“的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！