如何在使用来自 AWS Lambda 的 307 重定向（POST 方法和正文）在 python 中传递请求正文

Question

I need to redirect to an another end point from my AWS Lambda function. I have implemented below code in AWS Lambda function and trying to Redirect to an End Point implement in external system as a POST end point. I am not sure how to pass the Request Body.

Python code is trying to redirect, but I am not sure how to pass a "new" Request Body as it is a POST Endpoint, I don't want the original body to get transmitted.

Please see the Java error at the destination where it got redirected.

def lambda_handler(event, context):
    
    # Create Dictionary
    value = {
        "language": "python33",
        "greetings" : "Greetings... Hope you have been redirected"
    }
 
    # Dictionary to JSON Object using dumps() method
    # Return JSON Object
    return {
    "headers": {"Location": "http://localhost:8080/urlcallback",'Content-Type':'application/json' ,},
    'statusCode': 307,
    'body':  json.dumps(value)
    }
    
    
The Redirected End Point is getting invoked, but with the below error in the JAVA Spring boot logs: 

{
    "timestamp": 1671820676750,
    "status": 500,
    "error": "Internal Server Error",
    "exception": "org.springframework.http.converter.HttpMessageNotReadableException",
    "message": "Required request body is missing: public java.util.Map<java.lang.String, java.lang.String> my.sample.service.controller.PingController.urlcallback(java.lang.String)",
    "path": "/urlcallback"
}

I will greatly appreciate any suggestions or pointers.  I could not find any when I checked on StackOverFlow

Note:

I tried first with basic redirect of 301 and 302, that works for a GET call, but now I get an error while doing a Redirect with POST end point and a request body as I have some sensitive data to transmit

Answer 1

I am not sure how to pass a "new" Request Body as it is a POST Endpoint, I don't want the original body to get transmitted.

Based on HTTP 307 docs this is not possible: "307 guarantees that the method and the body will not be changed when the redirected request is made"

You can try HTTP 303 and change the request type to GET to remove the body from the request.