PROSAGA码农传奇-智能网关-如何发送到亚马逊的Alexa Event Gateway？

我正在尝试使用邮递员测试将事件发送到Amazon Event Gateway以获得我的Alexa Smart Home技能，但是我一直收到“无效的访问令牌异常”。我已经阅读了亚马逊的文档，但是显然我缺少了一些东西。启用技能后，我的Smart Home Lambda会收到AcceptGrant。
<pre><code>{
 "directive": {
 "header": {
 "namespace": "Alexa.Authorization",
 "name": "AcceptGrant",
 "messageId": "b2862179-bc56-4bb2-ac05-ce55c7a3e977",
 "payloadVersion": "3"
 },
 "payload": {
 "grant": {
 "type": "OAuth2.AuthorizationCode",
 "code": "ANSVjPzpTDBsdfoRSyrs"
 },
 "grantee": {
 "type": "BearerToken",
 "token": "Atza|IwEB..."
 }
 }
 }
}
</code></pre>我的lambda将POST发送到“ <a href="https://api.amazon.com/auth/o2/token">https://api.amazon.com/auth/o2/token</a> ”，以接收访问和刷新令牌。然后，它将存储这些令牌。接下来，我的Lamdba会回应以下内容：
<pre><code>{
 "event": {
 "header": {
 "namespace": "Alexa.Authorization",
 "name": "AcceptGrant.Response",
 "messageId": "b2862179-bc56-4bb2-ac05-ce55c7a3e977",
 "payloadVersion": "3"
 },
 "payload": {}
 }
}
</code></pre>然后，我得到一个消息网页，我已成功链接了我的技能-一切都很好。接下来，我尝试使用Postman应用将事件发送到Amazon的Alexa事件网关。我将Access令牌（我也尝试过Refresh令牌）放在标头中，作为“ BearerToken”类型，并将其放在“端点”对象的“ 作用域 ”中。POST <a href="https://api.amazonalexa.com/v3/events?Content-Type=application/json&charset=UTF-8">https://api.amazonalexa.com/v3/events?Content-Type=application/json&charset=UTF-8</a> ，其标头指定了Bearer令牌（之前收到的访问令牌），并且正文包含以下内容：
<pre><code>{
 "event": {
 "header": {
 "messageId": "abc-123-def-456",
 "namespace": "Alexa",
 "name": "ChangeReport",
 "payloadVersion": "3"
 },
 "endpoint": {
 "scope": {
 "type": "BearerToken",
 "token": "<access token>"
 },
 "endpointId": "MySmartSwitch-001"
 },
 "payload": {
 "change": {
 "cause": {
 "type": "RULE_TRIGGER"
 },
 "properties": [
 {
 "namespace": "Alexa.ModeController",
 "name": "mode",
 "value": "Backup",
 "timeOfSample": "2020-01-02T09:30:00ZZ",
 "uncertaintyInMilliseconds": 50
 }
 ]
 }
 }
 },
 "context": {
 "properties": [
 {
 "namespace": "Alexa.PowerController",
 "name": "powerState",
 "value": "ON",
 "timeOfSample": "2020-01-02T09:30:00Z",
 "uncertaintyInMilliseconds": 60000
 },
 {
 "namespace": "Alexa.EndpointHealth",
 "name": "connectivity",
 "value": {
 "value": "OK"
 },
 "timeOfSample": "2020-01-02T09:30:00Z",
 "uncertaintyInMilliseconds": 0
 }
 ]
 }
}
</code></pre>收到的响应为“ 401未经授权”
<pre><code>{
 "header": {
 "namespace": "System",
 "name": "Exception",
 "messageId": "95bd23c3-76e6-472b-9c6d-74d436e1eb61"
 },
 "payload": {
 "code": "INVALID_ACCESS_TOKEN_EXCEPTION",
 "description": "Access token is not valid."
 }
}
</code></pre>