REST PUT request 'body' ignored, only path parameter is passed when I request via curl

Hello,

I configured API gateway & lambda function to update one of my dynamodb table.

Completed testing with API gateway menu, so also tried with curl, but it fail.

Checked cloud watch log, I only can see path parameter, body is not passed correctly.

How can I fix it? As I know, PUT request could have body to update database table attribute value, but it's not in my case.

I also configured 'use lambda proxy integration' option in 'integration request'.

For better understanding, I also add my configuration in below.

Resource

/card/{card_no}

GET

DELETE

PUT <-- this is the problem

tested by API gateway test client

INIT_START Runtime Version: python:3.9.v16 Runtime Version ARN: xxxx

START RequestId: xxxx Version: $LATEST

Event:

{

"resource": "/card/{card_no}",

"path": "/card/1",

"httpMethod": "PUT",

"headers": null,

"multiValueHeaders": null,

"queryStringParameters": null,

"multiValueQueryStringParameters": null,

"pathParameters": {

    "card_no": "1"

},

...

"body": "{\n    \"card_no\": 1,\n    \"nickname\": \"name\",\n    \"overall_type\": \"type\"\n}",

"isBase64Encoded": false

}

END RequestId: xxxx

REPORT RequestId: xxxx Duration: 1322.79 ms Billed Duration: 1323 ms Memory Size: 128 MB Max Memory Used: 66 MB Init Duration: 236.32 ms

tested by curl

curl -v -X PUT \

'https://xxxx.amazonaws.com/dev/card/1' \

-H 'content-type: application/json' \

-d '{"card_no": 1,"nickname": "nickname","overall_type": "type"}'

Trying xxx..

Connected to xxxx (xxxx) port 443 (#0)

ALPN: offers h2

ALPN: offers http/1.1

....

Using HTTP2, server supports multiplexing

Copying HTTP/2 data in stream buffer to connection buffer after upgrade: len=0

h2h3 [:method: PUT]

h2h3 [:path: /dev/card/1]

h2h3 [:scheme: https]

h2h3 [:authority: xxxx.amazonaws.com]

h2h3 [user-agent: curl/7.86.0]

h2h3 [accept: /]

h2h3 [content-type: application/json]

h2h3 [content-length: 60]

Using Stream ID: 1 (easy handle 0x14180c600)

PUT /dev/card/1 HTTP/2

Host: xxxx.amazonaws.com

user-agent: curl/7.86.0

accept: /

content-type: application/json

content-length: 60

Connection state changed (MAX_CONCURRENT_STREAMS == 128)!

We are completely uploaded and fine

HTTP/2 200

date: xxx

content-type: application/json

content-length: 220

x-amzn-requestid: xxxx

x-amz-apigw-id: xxxx

x-amzn-trace-id: Root=xxxx

Connection #0 to host 3pjqiu4m22.execute-api.ap-northeast-2.amazonaws.com left intact

{"errorMessage": "'body'", "errorType": "KeyError", "requestId": "xxxx", "stackTrace": [" File "/var/task/index.py", line 12, in handler\n body_input = json.loads(event['body'])\n"]}%

cloud watch log when I send curl

INIT_START Runtime Version: python:3.9.v16 Runtime Version ARN: xxxx

START RequestId: xxxx Version: $LATEST

Event:

{

"card_no": 1

} ==> strange point, I added print in my python code to see all the request, but only path parameter passed, can't see body...

[ERROR] KeyError: 'body'

Traceback (most recent call last):

File "/var/task/index.py", line 12, in handler

body_input = json.loads(event['body'])

END RequestId: xxxx

REPORT RequestId: xxxx Duration: 1024.82 ms Billed Duration: 1025 ms Memory Size: 128 MB Max Memory Used: 64 MB Init Duration: 226.62 ms

lambda code

import json
import boto3

def handler(event, context) :
  print("Event: %s" % json.dumps(event))
  client = boto3.resource('dynamodb')
  table = client.Table('CardInfo')

  body_input = json.loads(event['body'])
  
  response = table.update_item(
      xxx...xxx
    },
    ReturnValues="UPDATED_NEW"
  )

  return {
    'statusCode': response['ResponseMetadata']['HTTPStatusCode'],
    'body': json.dumps(response['Attributes'], default=str)
  }