如何将“ OpenWeather” API互锁到AWS Sumerian？

Question

我引用并复制了JavaScript脚本，该脚本从OpenWeather API获取天气信息，而我复制的脚本在AWS Sumerian中无法正常工作。

下面是我参考并尝试过的教程网站。

https://docs.sumerian.amazonaws.com/articles/weather-report-guest/

我个人认为脚本中的'fetch（）'函数没有得到任何响应，也不知道为什么。

我要实现的是从开放的API获取天气信息，并让3D模型主机使用AWS Sumerian（3D建模工具）和Amazon Polly（文本到语音）服务来讲这些天气信息。

首先，此Sumerian由两种开发工具组成。一种是称为“状态机”的流程图工具，它可以控制Sumerian中的3D模型。 就像'MIT Scratch'一样，并且可以自行设置脚本条件。

另一个是从状态机基于JavaScript创建的“脚本”。以下是脚本API的参考网站。

https://content.sumerian.amazonaws.com/engine/latest/docs/

因此，在状态机中，我创建了2个状态，下面是我创建的状态。

     Get Weather(On Get Weather Script Success, On Get Weather Failure)
                                      ↓
Tell Weather(On Tell Weather Script Success, On Tell Weather Script Failure)

问题是，在“获取天气”状态下，即使失败也没有来自“获取天气脚本”的响应。

请检查脚本（获取天气，告诉天气），然后回复代码中是否有错误或指出我在脚本中犯的任何错误。

获取天气脚本

'use strict';
/* global sumerian */

const WEATHER_URL = 'https://api.openweathermap.org/data/2.5/weather?q=seoul&appid=your openweathermap api key here'

// When used in a ScriptAction, called when a state is entered.
//
function enter(args, ctx) {
        const { latitude, longitude } = ctx.behaviorData.payload; // 1
        fetch('${WEATHER_URL}&lat={latitude}&lon=${longitude}') // 2
                .then(response => response.json())
                .then(data => {
                        ctx.behaviorData.payload.weather = data.weather[0].description; // 3
                        ctx.transitions.success(); // 4
                });
}

// Defines script parameters.
//
var parameters = [];

Chrome控制台消息

[Sumerian] Loading engine version 0.25.201907101851+9b630ed with enabled features: core, bootstrapper, gizmo, sceneloader, animation, aws, debug, dom3d, host, particle, physics, cannonphysics, posteffect, timeline.
content.sumerian.amazonaws.com/engine/0/25/201907101851+9b630ed/sumerian.js:14 [Sumerian] Loaded Sumerian Engine Version: 0.25.201907101851+9b630ed
content.sumerian.amazonaws.com/engine/0/25/201907101851+9b630ed/sumerian.js:1 [Sumerian] Using WebGL2
content.sumerian.amazonaws.com/engine/0/25/201907101851+9b630ed/sumerian.js:14 [Sumerian] An unhandled error has occurred: SyntaxError: Unexpected end of JSON input
    at JSON.parse (<anonymous>)
    at SpeechManager._parseSpeechMarks (content.sumerian.amazonaws.com/engine/0/25/201907101851+9b630ed/awspack.js:2)
    at content.sumerian.amazonaws.com/engine/0/25/201907101851+9b630ed/awspack.js:2
    at async Promise.all (ap-northeast-2.sumerian.amazonaws.com/edit/index 1)
(anonymous) @ content.sumerian.amazonaws.com/engine/0/25/201907101851+9b630ed/sumerian.js:14
(unknown) Cannot establish connection - target does not exist
content.sumerian.amazonaws.com/engine/0/25/201907101851+9b630ed/sumerian.js:14 [Sumerian] An unhandled error has occurred: SyntaxError: Unexpected end of JSON input
    at JSON.parse (<anonymous>)
    at SpeechManager._parseSpeechMarks (content.sumerian.amazonaws.com/engine/0/25/201907101851+9b630ed/awspack.js:2)
    at content.sumerian.amazonaws.com/engine/0/25/201907101851+9b630ed/awspack.js:2
    at async Promise.all (ap-northeast-2.sumerian.amazonaws.com/edit/index 1)
(anonymous) @ content.sumerian.amazonaws.com/engine/0/25/201907101851+9b630ed/sumerian.js:14
content.sumerian.amazonaws.com/engine/0/25/201907101851+9b630ed/sumerian.js:1 [Sumerian] An error occurred at line 11 when calling the "Get Weather Script" script's "enter" function. Cannot destructure property `latitude` of 'undefined' or 'null'. TypeError: Cannot destructure property `latitude` of 'undefined' or 'null'.
    at ScriptProxy_ScriptProxy.enter (ap-northeast-2.sumerian.amazonaws.com/edit/sumerian-custom-scripts/b70ff1b210bf482981c931bf6c4719d6.script.js?v=5:27)
    at ScriptSystem.callScriptFunction (content.sumerian.amazonaws.com/engine/0/25/201907101851+9b630ed/sumerian.js:1)
    at ScriptAction_ScriptAction.enter (content.sumerian.amazonaws.com/engine/0/25/201907101851+9b630ed/sumerian.js:14)
    at State._callSafe (content.sumerian.amazonaws.com/engine/0/25/201907101851+9b630ed/sumerian.js:1)
    at State.enter (content.sumerian.amazonaws.com/engine/0/25/201907101851+9b630ed/sumerian.js:1)
    at Machine.enter (content.sumerian.amazonaws.com/engine/0/25/201907101851+9b630ed/sumerian.js:1)
    at StateMachineComponent.start (content.sumerian.amazonaws.com/engine/0/25/201907101851+9b630ed/sumerian.js:1)
    at StateMachineSystem_StateMachineSystem._startEntity (content.sumerian.amazonaws.com/engine/0/25/201907101851+9b630ed/sumerian.js:14)
    at StateMachineSystem_StateMachineSystem.start (content.sumerian.amazonaws.com/engine/0/25/201907101851+9b630ed/sumerian.js:1)
    at StateMachineSystem_StateMachineSystem.start (content.sumerian.amazonaws.com/engine/0/25/201907101851+9b630ed/sumerian.js:14)
_handleScriptError @ content.sumerian.amazonaws.com/engine/0/25/201907101851+9b630ed/sumerian.js:1
content.sumerian.amazonaws.com/engine/0/25/201907101851+9b630ed/sumerian.js:1 [Sumerian] An error occurred at line 9 when calling the "Get Weather Script" script's "enter" function. Cannot destructure property `latitude` of 'undefined' or 'null'. TypeError: Cannot destructure property `latitude` of 'undefined' or 'null'.
    at ScriptProxy_ScriptProxy.enter (ap-northeast-2.sumerian.amazonaws.com/edit/sumerian-custom-scripts/b70ff1b210bf482981c931bf6c4719d6.script.js?v=6:25)
    at ScriptSystem.callScriptFunction (content.sumerian.amazonaws.com/engine/0/25/201907101851+9b630ed/sumerian.js:1)
    at ScriptAction_ScriptAction.enter (content.sumerian.amazonaws.com/engine/0/25/201907101851+9b630ed/sumerian.js:14)
    at State._callSafe (content.sumerian.amazonaws.com/engine/0/25/201907101851+9b630ed/sumerian.js:1)
    at State.enter (content.sumerian.amazonaws.com/engine/0/25/201907101851+9b630ed/sumerian.js:1)
    at Machine.enter (content.sumerian.amazonaws.com/engine/0/25/201907101851+9b630ed/sumerian.js:1)
    at StateMachineComponent.start (content.sumerian.amazonaws.com/engine/0/25/201907101851+9b630ed/sumerian.js:1)
    at StateMachineSystem_StateMachineSystem._startEntity (content.sumerian.amazonaws.com/engine/0/25/201907101851+9b630ed/sumerian.js:14)
    at StateMachineSystem_StateMachineSystem.start (content.sumerian.amazonaws.com/engine/0/25/201907101851+9b630ed/sumerian.js:1)
    at StateMachineSystem_StateMachineSystem.start (content.sumerian.amazonaws.com/engine/0/25/201907101851+9b630ed/sumerian.js:14)

告诉天气脚本

'use strict';
/* global sumerian */

function compileSpeech(speech, args) {
        return speech.replace(/\$\{([^}]+)\}/g, (match, variable) => args[variable] || '');
}

// When used in a ScriptAction, called when a state is entered
//
function enter(args, ctx) {
        const speech = ctx.entity.speechComponent.speeches[0];
        // Put dynamic data into speech
        speech.body = compileSpeech(speech.body, ctx.behaviorData.payload)
}

// Defines script parameters.
//
var parameters = [];

我希望Get Weather Script能够正常工作并将JSON数据提供给Tell Weather Script，以便3D模型主机可以说出并告知天气。