如何通过AWS HTTP API将参数发送到Lambda [英] How to send parameters through AWS HTTP API to Lambda

问题描述

我已经从REST API切换到HTTP API，因为它具有成本效益.我是AWS的菜鸟，所以请耐心等待我.

I have switched from the REST API to HTTP API for it's cost efficiency. I am a noob to AWS so please be patient with me.

LAMBDA

我有一个简单的Lambda函数，它返回的值与给定的值相同.从实际的Lambda控制台进行测试后，它可以很好地工作.

I have a simple Lambda function that returns the same value it's given. It works fine when tested from the actual Lambda console.

exports.handler = async (event) => {
    // TODO implement
    const response = {
        statusCode: 200,
        body: "hello" + event["key1"]
    };
    return response;
};

从Lambda控制台使用JSON输入测试功能时:{"key1":"value1"}，则返回"hellovalue1".这是我希望我的GET/POST请求返回的内容.

When the function is tested from the Lambda console with JSON input: { "key1":"value1" }, it returns "hellovalue1". This is what I want my GET/POST request to return.

API网关(HTTP API)

我创建了一个简单的HTTP API，该API导致了上述的lambda函数. https://39lzilxqm2.execute-api.eu-central-1.amazonaws.com/MS_APITest

I created a simple HTTP API which leads to the lambda function above. https://39lzilxqm2.execute-api.eu-central-1.amazonaws.com/MS_APITest

从浏览器调用上面的链接时，它返回 helloundefined .

When the link above is called from the browser, it returns helloundefined.

我假设传递参数的方式是[THE LINK ABOVE]?key1 = value1，但这也会返回 helloundefined

I would assume the way of passing an argument would be [THE LINK ABOVE]?key1=value1, but that also returns helloundefined

当使用其他在线工具通过GET/POST请求将JSON数据发送到上面的链接时，结果再次是 helloundefined

When using other online tools to send JSON data to the link above through GET/POST requests, the result is, again, helloundefined

荣誉奖:通过邮递员发送请求时，它会显示错误:

Honorable mention: When sending a request through postman, it displays an error:

CORS错误:由于CORS政策，请求已被阻止

CORS Error: The request has been blocked because of the CORS policy

如何使用HTTP API将参数传递给AWS Lambda?

How do I pass an argument to AWS Lambda using HTTP API?

谢谢.

推荐答案

我尝试使用HTTP API 复制该问题.我注意到该活动具有以下形式.

I tried to replicate the issue using HTTP API. I noticed that the event has the following form.

{
  version: '2.0',
  routeKey: 'ANY /MS_APITest',
  rawPath: '/MS_APITest',
  rawQueryString: 'key1=value1',
  headers: {
    accept: '*/*',
    'content-length': '0',
    host: 'xxxxx.execute-api.us-east-1.amazonaws.com',
    'user-agent': 'curl/7.72.0',
    'x-amzn-trace-id': 'Root=1-5f5afd55-332693f425fbcc7a032809da',
    'x-forwarded-for': 'xxxxxxxxx',
    'x-forwarded-port': '443',
    'x-forwarded-proto': 'https'
  },
  queryStringParameters: { key1: 'value1' },
  requestContext: {
    accountId: '820872329501',
    apiId: 'sg5mhha5ic',
    domainName: 'xxxx.execute-api.us-east-1.amazonaws.com',
    domainPrefix: 'sg5mhha5ic',
    http: {
      method: 'GET',
      path: '/MS_APITest',
      protocol: 'HTTP/1.1',
      sourceIp: 'xxxxxx',
      userAgent: 'curl/7.72.0'
    },
    requestId: 'SryFYjtUIAMEV5w=',
    routeKey: 'ANY /MS_APITest',
    stage: '$default',
    time: '11/Sep/2020:04:30:13 +0000',
    timeEpoch: 1599798613551
  },
  isBase64Encoded: false
}

可以看出，?key1 = value1 的传递方式为

As can be seen the ?key1=value1 is passed as

queryStringParameters: { key1: 'value1' },

因此，lambda函数应为:

Therefore, the lambda function should be:

exports.handler = async (event) => {
    // TODO implement
    console.log(event)
    const response = {
        statusCode: 200,
        body: "hello" + event['queryStringParameters']["key1"]
    };
    return response;
};

我验证，它可以使用:

curl https://xxxx.execute-api.us-east-1.amazonaws.com/MS_APITest?key1=value1

导致:

hellovalue1

这篇关于如何通过AWS HTTP API将参数发送到Lambda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！