自定义授权程序的AWS API网关403错误

Question

let jwtDecode = require('jwt-decode');

var generatePolicy = function (authToken, methodArn) {
    'use strict';
    var tmp = methodArn.split(':'),
    apiGatewayArnTmp = tmp[5].split('/'),
    awsAccountId = tmp[4],
    region = tmp[3],
    restApiId = apiGatewayArnTmp[0],
    stage = apiGatewayArnTmp[1];
    let group = jwtDecode(authToken)["cognito:groups"];

if (group[0] === 'Admin') {
        return {
            'principalId': authToken.split('-')[0],
            'policyDocument': {
                'Version': '2012-10-17',
                'Statement': [{
                    'Effect': 'Allow',
                    'Action': [
                        'execute-api:Invoke'
                    ],
                    'Resource': [
                        'arn:aws:execute-api:' + region + ':' + awsAccountId + ':' + restApiId + '/' + stage + '/GET/citizens',
                        'arn:aws:execute-api:' + region + ':' + awsAccountId + ':' + restApiId + '/' + stage + '/GET/citizens/{citizenId}/personal-details'
                    ]
                }]
            }
        };
    }


exports.auth = function testAuth(event, context, callback) {
    'use strict';
    console.log('got event', event);

    /*
     * {
     * "type":"TOKEN",
     * "authorizationToken":"<Incoming bearer token>",
     * "methodArn":"arn:aws:execute-api:<Region id>:<Account id>:<API id>/<Stage>/<Method>/<Resource path>"
     * }
     */
    if (event && event.authorizationToken && event.methodArn) {
        callback(null, generatePolicy(event.authorizationToken, event.methodArn));
    } else {
        callback('Unauthorized');
    }
};

'arn:aws:execute-api:' + region + ':' + awsAccountId + ':' + restApiId + '/' + stage + '/GET/citizens/{citizenId}/personal-details'

{
    "Message": "User is not authorized to access this resource"
}

这个问题有什么解决办法吗？

Answer 1

资源不应是API网关方法的路径。

实际上，它应该是资源的Arn。您可以通过执行以下操作从AWS控制台获得此信息：

• 打开API网关
• 选择您的API网关
• 单击资源选项
• 查找资源（这将是citizens/{citizenId}/personal-details下面的get方法）。单击它。
• 您可以使用ARN。

'arn:aws:execute-api:' + region + ':' + awsAccountId + ':' + restApiId + '/' + stage + '/GET/citizens/*/personal-details'