Aws lambda AWS Lambda:Can'；t通过URL访问事件['；参数'；]，但它在API GW测试中起作用

我不确定我做错了什么。我成功地设置了API网关、Python Lambda函数、通过Route53正确的DNS和有效的TLS证书

我可以通过调用mydomain.com/Lambda访问我的Lambda，但我没有获得任何参数来传递，只有这个错误。我已经试了5个小时了

通过mydomain.com/lambda调用时

import json

def lambda_handler(event, context):
    return {
        "statusCode": 200,
        "headers": {"Content-Type": "application/json"},
        "body": json.dumps(event['param'])
    }

通过API网关的“测试”调用时（此处一切正常）

最终成功（通过API网关的“测试”）

---

如何通过URL使其工作？我试图从客户端（浏览器）获取一些头参数，但需要逐步学习。似乎当通过URL调用时，我甚至无法从API网关到Lambda传递任何信息，但为什么呢？我在概念上没有得到什么（

我将其全部设置正确，但不知道必须重新部署API才能公开进行更改

答案就是：再次部署API

 errorMessage   "'param'"
    errorType   "KeyError"
    stackTrace  
    0   "  File \"/var/task/lambda_function.py\", line 7, in lambda_handler\n    \"body\": json.dumps(event['param'])\n"

    Execution log for request 
    Tue Nov 05 22:42:47 UTC 2019 : Starting execution for request:
    Tue Nov 05 22:42:47 UTC 2019 : HTTP Method: GET, Resource Path: /
    Tue Nov 05 22:42:47 UTC 2019 : Method request path: {}
    Tue Nov 05 22:42:47 UTC 2019 : Method request query string: {}
    Tue Nov 05 22:42:47 UTC 2019 : Method request headers: {}
    Tue Nov 05 22:42:47 UTC 2019 : Method request body before transformations: 
    Tue Nov 05 22:42:47 UTC 2019 : Endpoint request URI: 
    Tue Nov 05 22:42:47 UTC 2019 : Endpoint request headers: {x-amzn-lambda-integration-tag=Authorization=...[TRUNCATED]
    Tue Nov 05 22:42:47 UTC 2019 : Endpoint request body after transformations: 
    {
      "param" : "foo"
    }
    Tue Nov 05 22:42:47 UTC 2019 : Sending request to 
    Tue Nov 05 22:42:47 UTC 2019 : Received response. Status: 200, Integration latency: 36 ms
    Tue Nov 05 22:42:47 UTC 2019 : Endpoint response headers: [...]
    Tue Nov 05 22:42:47 UTC 2019 : Successfully completed execution
    Tue Nov 05 22:42:47 UTC 2019 : Method completed with status: 200

{
  "statusCode": 200,
  "headers": {
    "Content-Type": "application/json"
  },
  "body": "\"foo\""
}