【发布时间】:2019-07-05 05:15:29
【问题描述】:
当我尝试在 Javascript 上调用 RTCQuicTransport 的构造函数时,它会抛出错误:Uncaught TypeError: Failed to construction 'RTCQuicTransport': The provided value cannot be convert to a sequence.
假设构造函数需要两个参数,一个 RTCIceTransport 对象和一个使用 RTCPeerConnection.generateCertificate() 生成的证书,它应该以这种方式工作,但不是。
我尝试将“null”作为证书传递,但仍然抛出相同的错误消息。如果我只是传递 RTCIceTransport 对象,它会抛出该构造需要两个参数。
// Include some helper functions
//import {trace, errorHandler, mySendLocalCandidate,
myIceGathererStateChange,
// myIceTransportStateChange, myDtlsTransportStateChange} from 'helper';
//import 'helper.js';
function initiate(mySignaller) {
// Prepare the IceGatherer
var gatherOptions = {
gatherPolicy: "all",
iceServers: [
{ urls: "stun:stun1.example.net" },
{ urls: "turn:turn.example.org", username: "user", credential:
"myPassword",
credentialType: "password" }
]
};
// Create the IceTransport
var ice = new RTCIceTransport();
ice.onstatechange = function(event) {
myIceGathererStateChange("iceGatherer", event.state);
};
// Handle errors
// Prepare to signal local candidates
ice.onlocalcandidate = function(event) {
mySignaller.mySendLocalCandidate(event.candidate);
};
// Start gathering
ice.gather(gatherOptions);
// Prepare to handle remote ICE candidates
console.log(ice);
mySignaller.onRemoteCandidate = function(remote) {
ice.addRemoteCandidate(remote.candidate);
};
// Create the certificate
var certs = {};
var keygenAlgorithm = { name: "ECDSA", namedCurve: "P-256"};
RTCPeerConnection.generateCertificate(keygenAlgorithm).
then(function(certificate){
certs[0] = certificate;
}, function(){
trace('Certificate could not be created');
});
// Create the DtlsTransport and QuicTransport
var quic = new RTCQuicTransport(ice, certs[0]);
console.log(quic);
mySignaller.sendInitiate({
ice: iceGatherer.getLocalParameters(),
quic: quic.getLocalParameters(),
// ... marshall RtpSender/RtpReceiver capabilities as in Section 6.6
Examples 8 and 9.
}, function(remote) {
// Start the IceTransport, DtlsTransport and QuicTransport
ice.start(iceGatherer, remote.ice, RTCIceRole.controlling);
dtls.start(remote.dtls);
quic.start(remote.quic);
// ... configure RtpSender/RtpReceiver objects as in Section 6.6
Examples 8 and 9.
});}
我正在关注 ORTC quic 示例,我希望获得一个 RTCQuicTransport 对象。
提前致谢
编辑:
我意识到当我在 generateCertificate() 函数中打印我的证书时,它可以正常工作:
RTCCertificate {expires: 1552505428000}
expires: 1552505428000
但是,从那个函数中,我得到了这个:
console.log(certs);
结果:
{}
[0] RTCCertificate
expires: 1552505951000
那我试试:
console.log(certs[0]);
结果:
undefined
【问题讨论】:
-
确保以可搜索、可复制、格式化的文本(通过edit)显示准确和完整的错误和跟踪。
-
您是否正在尝试developers.google.com/web/updates/2019/01/rtcquictransport-api 中描述的 Chrome 实验?不幸的是,该实验不符合规范。 webrtchacks.com/first-steps-with-quic-datachannel 有另一个描述以及运行代码。
-
感谢@jdv 的推荐
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菲利普,嗨。我已经尝试过 ORTC API 规范中的示例代码:draft.ortc.org/#rtcquicexample* 此代码无法运行,因为只有 Edge 浏览器支持 RTCIceGatherer,但是,我修改了代码以获取 RTCQuicTransport 所需的 RTCIceTransport 对象。我尝试了您引用的 api“developers.google.com/web/updates/2019/01/rtcquictransport-api”,但由于 RTCQuicTransport 对象是从 2 个参数(IceTransport 对象、证书)创建的,因此该代码不起作用。感谢第二次参考,我去看看试试
-
遗憾的是,Edge 不支持 QUICTransport。
标签: javascript google-chrome webrtc chromium quic