我正在尝试使用Twilio函数来处理Twilio应用程序的令牌生成。我以前使用Node.js + Express Server来完成此任务,但我不知道如何在这种类型的环境中找出启用CORS。
我的客户端代码如下所示:
$('#new-twilio').click(function(){
var toNum = this.value;
if(token == undefined) {
$.getJSON('https://my-twilio-function/endpoint').done(function(data){
token = data.token;
Twilio.Device.setup(token, {debug: true});
Twilio.Device.ready(function(device){
Twilio.Device.connect({"PhoneNumber": toNum});
});
}).fail(function(error){
alert("Failure!");
alert(JSON.stringify(error));
});
} else {
Twilio.Device.connect({"PhoneNumber": toNum});
}
});
我的功能代码如下:
exports.handler = function(context, event, callback) {
const client = context.getTwilioClient();
const ClientCapability = require('twilio').jwt.ClientCapability;
const responseHeaders = {
"Access-Control-Allow-Origin": "*",
"Access-Control-Allow-Methods": "GET, POST",
"Access-Control-Allow-Headers": "content-type, accept",
"Content-Type": "application/json"
};
let identity = "sampleIdentity";
const capability = new ClientCapability({
accountSid: context.ACCOUNT_SID,
authToken: context.AUTH_TOKEN
});
capability.addScope(new ClientCapability.IncomingClientScope(identity));
capability.addScope(new ClientCapability.OutgoingClientScope({
applicationSid: context.TWILIO_TWIML_APP_SID
}));
console.log(capability.toJwt());
callback(null, {headers: responseHeaders, identity: identity, token: capability.toJwt()});
};
值得注意的是,console.log证明这个函数正在返回我需要的确切令牌,但我继续得到这个错误:
XMLHttpRequest cannot load https://my-twilio-function/endpoint. No 'Access-Control-Allow-Origin' header is present on the requested resource. Origin 'http://localhost:8080' is therefore not allowed access.
显然,我的twilio功能是一个真正的URL。就像我谷歌一样,我找不到如何允许对这种类型的节点方法进行访问控制。
答案 0 :(得分:2)
此客户端代码最终正常运行:
exports.handler = function(context, event, callback) {
const client = context.getTwilioClient();
const ClientCapability = require('twilio').jwt.ClientCapability;
const response = new Twilio.Response();
response.appendHeader('Access-Control-Allow-Origin', '*');
response.appendHeader('Access-Control-Allow-Methods', 'GET,PUT,POST,DELETE');
response.appendHeader('Access-Control-Allow-Headers', 'Content-Type');
response.appendHeader('Content-Type', 'application/json');
let identity = "sampleIdentity";
const capability = new ClientCapability({
accountSid: context.ACCOUNT_SID,
authToken: context.AUTH_TOKEN
});
capability.addScope(new ClientCapability.IncomingClientScope(identity));
capability.addScope(new ClientCapability.OutgoingClientScope({
applicationSid: context.TWILIO_TWIML_APP_SID
}));
response.setBody({identity: identity, token: capability.toJwt()})
console.log(capability.toJwt());
callback(null, response);
};
答案 1 :(得分:1)
Twilio开发者传道者在这里。
我很高兴看到K. Rhoda解决了这个问题。我只是想明白是什么让它发挥作用。
您可以从功能中的Twilio.Response
访问custom response。响应初始化如下:
const response = new Twilio.Response();
然后有以下有用的方法:
// set the body of the response
response.setBody(body);
// set a header for the response
response.appendHeader(key, value);
// set all the headers for the response
response.setHeaders(obj);
// set the status code for the response
response.setStatusCode(200);
然后您可以使用回调函数发送该响应,如下所示:
callback(null, response);
答案 2 :(得分:0)
就我而言,上述所有操作均无法正常进行,因为我已默认选中“ 检查有效的Twilio签名”并发出了没有签名的请求。
在我取消选中它之后,以上答案起作用了。因此,请注意是否已选中此选项以及是否已正确签名。