使用Walmart测试通知API验证Webhook端点时遭遇500内部服务器错误的排查求助

我在使用Walmart测试通知API验证我的Webhook端点URL时，它返回了**"(500 internal server error)"**。但我手动通过Putty服务器的cmd发送curl post请求到该端点URL，附带假的JSON数据时，请求能被端点正常处理。而且我的服务器背后也没有运行防火墙，实在搞不懂为什么会出现这个错误？

我的测试请求代码： #

def test_notification(access_token):
    url             = "https://marketplace.walmartapis.com/v3/webhooks/test"
    evt_url         = "https://example.com/price-track/wm_test/wb_test.php"
    event_type      = "OFFER_UNPUBLISHED"
    resourceName    = "ITEM"

    headers = {
        "Accept": "application/json;",
        "Content-Type": "application/json;",
        "WM_SEC.ACCESS_TOKEN": access_token,
        "WM_SVC.NAME": "Walmart Marketplace",
        "WM_QOS.CORRELATION_ID": "vemutriruvelganuku6arksogaueora6"
    }

    notification_payload = {
        "eventType": event_type,
        "eventVersion": "V1",
        "resourceName": resourceName,
        "eventUrl": evt_url,
        "headers": {
            "content-type": "application/json;"
        }
    }

    logging.info("Sending Walmart webhook test notification")
    logging.debug(f"URL: {url}")
    logging.debug(f"Headers: {json.dumps(headers, indent=4)}")
    logging.debug(f"Payload: {json.dumps(notification_payload, indent=4)}")

    try:

        # response = requests.post(url, headers=headers, data=json.dumps(notification_payload))
        response = requests.post(url, headers=headers, json=notification_payload)

        logging.info(f"Response Status Code: {response.status_code}")
        logging.debug(f"Response Headers: {response.headers}")
        logging.debug(f"Response Text: {response.text}")


        if response.status_code != 200:
            response_data = response.json()
            logging.error(f"Error Response JSON: {json.dumps(response_data, indent=4)}")

        return response.text if response.status_code == 200 else f"Error code: {response.status_code} - Error Message: {response.text}"

    except requests.exceptions.RequestException as e:
        logging.error(f"Request failed: {str(e)}", exc_info=True)
        return f"Request failed: {str(e)}"


client_id               = 'dbbcd0e08...............fg3' ## my client secret
client_secret           = 'aNeJpd53jTw...............76dg' ## my client secret
access_token            = get_access_token(client_id, client_secret)
Test_notification       = test_notification(access_token)
print(Test_notification)

我的Webhook端点处理代码（PHP）： #

<?php

    http_response_code(200);
    ini_set('display_errors', 1);
    ini_set('display_startup_errors', 1);
    error_reporting(E_ALL);

    header("Access-Control-Allow-Origin: *");
    header("Access-Control-Allow-Methods: POST, GET, OPTIONS");
    header("Access-Control-Allow-Headers: Content-Type, Authorization");
    header("Content-Type: application/json");

    $method = $_SERVER['REQUEST_METHOD'];

    $headers = getallheaders();
    file_put_contents("headers.log", date("Y-m-d H:i:s") . " -" . print_r($headers, true) .  PHP_EOL, FILE_APPEND);

    if ($method === 'POST') {

        $json_data = file_get_contents('php://input');
        file_put_contents("webhook_log.log", date("Y-m-d H:i:s") . " - " . $json_data . PHP_EOL, FILE_APPEND);

        $decoded_data = json_decode($json_data, true);
        if ($decoded_data === null) {
            file_put_contents("webhook_log.log", date("Y-m-d H:i:s") . " - JSON Decode Error: " . json_last_error_msg() . PHP_EOL, FILE_APPEND);
            http_response_code(400);
            echo json_encode(["error" => "Invalid JSON received", "details" => json_last_error_msg()]);
            exit;
        }
        
        http_response_code(200);
        echo json_encode(["message" => "Webhook received successfully"]);
        exit;

    } else {
        http_response_code(200);
        echo json_encode(["msg" => "This Is Get Method"]);
        exit;
    }
?>

错误日志： #

2025-02-04 07:36:24,728 - DEBUG - Starting new HTTPS connection (1): marketplace.walmartapis.com:443
2025-02-04 07:36:25,238 - DEBUG - https://marketplace.walmartapis.com:443 "POST /v3/token HTTP/1.1" 200 751
2025-02-04 07:36:25,240 - INFO - Sending Walmart webhook test notification
2025-02-04 07:36:25,240 - DEBUG - URL: https://marketplace.walmartapis.com/v3/webhooks/test
2025-02-04 07:36:25,240 - DEBUG - Headers: {
    "Accept": "application/json;",
    "Content-Type": "application/json;",
    "WM_SEC.ACCESS_TOKEN": "eyJraWQiOiI1NmE2YzVjMy03NTI4LTQ1Y2EtYWMwZC1iNjAzOTJiYzg5YjAiLCJlbmMiOiJBMjU2R0NNIiwiYWxnIjoiZGlyIn0..-fsXViqo7HDw1Ej8.Y7OqtUEuMtsWaWJWBh....",
    "WM_SVC.NAME": "Walmart Marketplace",
    "WM_QOS.CORRELATION_ID": "vemutriruvelganuku6arksogaueora6"
}
2025-02-04 07:36:25,241 - DEBUG - Payload: {
    "eventType": "OFFER_UNPUBLISHED",
    "eventVersion": "V1",
    "resourceName": "ITEM",
    "eventUrl": "https://example.com/price-track/wm_test/wb_test.php",
    "headers": {
        "content-type": "application/json;"
    }
}
2025-02-04 07:36:25,242 - DEBUG - Starting new HTTPS connection (1): marketplace.walmartapis.com:443
2025-02-04 07:36:28,727 - DEBUG - https://marketplace.walmartapis.com:443 "POST /v3/webhooks/test HTTP/1.1" 400 190
2025-02-04 07:36:28,729 - INFO - Response Status Code: 400
2025-02-04 07:36:28,729 - DEBUG - Response Headers: {'Accept-Ranges': 'bytes', 'Content-Type': 'application/json', 'Last-Modified': 'Tue, 04 Feb 2025 12:36:28 GMT', 'Vary': 'Origin,Access-Control-Request-Method,Access-Control-Request-Headers', 'X-Envoy-Upstream-Service-Time': '3189', 'X-Tb': '1', 'X-Tb-Optimization-Total-Bytes-Saved': '0', 'Content-Length': '190', 'Expires': 'Tue, 04 Feb 2025 12:36:28 GMT', 'Cache-Control': 'max-age=0, no-cache, no-store', 'Pragma': 'no-cache', 'Date': 'Tue, 04 Feb 2025 12:36:28 GMT', 'Connection': 'close'}
2025-02-04 07:36:28,729 - DEBUG - Response Text: {"errors":{"error":{"severity":"ERROR","description":"EventUrl (https://example.com/price-track/wm_test/wb_test.php) validation failed with http response code : 500","category":"DATA"}}}
2025-02-04 07:36:28,730 - ERROR - Error Response JSON: {
    "errors": {
        "error": {
            "severity": "ERROR",
            "description": "EventUrl (https://example.com/price-track/wm_test/wb_test.php) validation failed with http response code : 500",
            "category": "DATA"
        }
    }
}

我现在不知道该怎么继续排查这个问题了，能不能请大家给我一些指导，说说可能的错误原因和解决步骤呀？

提前谢谢大家的帮助！

备注：内容来源于stack exchange，提问作者Bala2125