如何使用Amazon Alexa访问本地API

本文介绍了如何使用Amazon Alexa访问本地API的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！ 问题描述

我打算为 Amazon Alexa 构建一套技能，这些技能将与

我正在努力弄清楚如何使Echo / Dot本身对树莓派进行API调用。

直接-无需通过Internet，因为目标设备将仅具有 Intranet 连接-它将能够从本地网络上的设备接收命令，但无法通过世界访问。

据我了解，典型的工作流程如下

回声-> Alexa服务-> Lambda

其中Lambda函数会将一滴数据返回到智能家居设备；使用此返回值

是否有可能，如何使Alexa设备本身向本地网络上的设备发出API请求，收到lambda的回复后？

解决方案

我遇到了同样的问题，我的解决方法是将SQS用作消息总线，这样我的RaspberryPi不需要从互联网上访问。

Echo<- > Alexa服务<-> Lambda-> SQS-> RaspberryPi A | + ------ SQS< ----- +

此只要在以下条件下工作正常：

• 您在RaspberryPi上启用了SQS的长轮询（20秒）并将每个请求的最大消息设置为1
• 您在Alexa和RaspberryPi之间没有来回并发消息

提供以下好处：

• 最大消息大小为1，队列中只有一条消息可用时，SQS请求将返回，甚至在长轮询超时未得到满足之前
• 在整个月中一次只向SQS进行一次长轮询，这符合100万次SQS免费套餐的要求
• 没有特殊的防火墙权限，无法从互联网访问您的RaspberryPi，因此从lambda进行RaspberryPi的连接始终有效
• 比将RaspberryPi暴露于互联网更安全没有开放的开放端口可用于苹果攻击性程序

I intend to build a set of skills for Amazon Alexa that will integrate with a custom software suite that runs on a RaspberryPi in my home.

I am struggling to figure out how I can make the Echo / Dot itself make an API call to the raspberry pi directly - without going through the internet, as the target device will have nothing more then an intranet connection - it will be able to receive commands from devices on the local network, but is not accessible via the world.

From what I have read, the typical workflow is as follows

Echo -> Alexa Service -> Lambda

Where a Lambda function will return a blob of data to the Smart Home device; using this return value

Is it possible, and how can I make the Alexa device itself make an API request to a device on the local network, after receiving a response from lambda?

解决方案

I have the same problem and my solution is to use SQS as the message bus so that my RaspberryPi doesn't need to be accessible from the internet.

Echo <-> Alexa Service <-> Lambda -> SQS -> RaspberryPi A | +------ SQS <-----+

This works fine as long as:

• you enable long polling (20sec) of SQS on the RaspberryPi and set the max messages per request to 1
• you don't have concurrent messages going back and forth between Alexa and the RaspberryPi

This give the benefit of:

• with a max message size of 1 the SQS request will return as soon as one message is available in the queue, even before the long poll timeout is met
• with only 1 long polling at a time to SQS for the entire month this fit under the SQS free tier of 1 million requests
• no special firewall permission for accessing your RaspberryPi from the internet, so the RaspberryPi's connection from the lambda always "just works"
• more secure than exposing your RaspberryPi to the internet since there are no open ports exposed for malicious programs to attack