使用AWS WAF正则表达式规则筛选API请求，以忽略Captcha挑战。

在AWS WAF中设置一个正则表达式规则，该规则筛选出所有符合条件的请求并将其标记为“Allow”。对于这些请求，API Gateway将忽略Captcha挑战，并继续将请求转发到后端服务。以下是AWS WAF中正则表达式规则的代码示例：

{
    "Type": "AWS::WAFv2::RegexPatternSet",
    "Properties": {
        "Name": "BypassCaptcha",
        "Scope": "REGIONAL",
        "RegularExpressions": [
            {
                "RegexString": ".+",
            }
        ],
        "Description": "Regex set for bypassing captcha"
    }
}

{
    "Type": "AWS::WAFv2::WebACL",
    "Properties": {
        "Name": "BypassCaptcha",
        "Scope": "REGIONAL",
        "DefaultAction": {
            "Block": {}
        },
        "Description": "WebACL for bypassing captcha",
        "Rules": [
            {
                "Name": "Allow",
                "Priority": 0,
                "Action": {
                    "Allow": {}
                },
                "Statement": {
                    "RegexPatternSetReferenceStatement": {
                        "ARN": "arn:aws:wafv2:us-west-2:123456789012:regional/regexpatternset/BypassCaptcha/abcdef12-34ab-5678-90de-1234567890ab"
                    }
                }
            }
        ]
    }
}

在上面的示例中，我们创建一个WAF Regex Pattern集和一个WebACL，以忽略Captcha验证，并自动将所有请求标记为“Allow”。要使用此解决方案，您需要将WebACL附加到API Gateway的部署阶段。