如何建立与AWS Device Farm远程会话终结点的连接

Question

我尝试创建AWS Device Farm远程会话，我能够成功完成它。创建的远程会话的响应JSON具有一个端点（wss）和hostAddress（IP）。而是登录到AWS设备场以与设备进行交互。我想直接在自己的网页上提供远程访问（不确定是否可行）。希望它可以在canvas标签下呈现。

尽管我没有使用套接字的经验，但我只是尝试了一些示例代码来与接收到的Web套接字URL连接。

var wsUri = "wss://devicefarm-interactive.us-west-2.amazonaws.com/?X-Amz-Date=*&X-Amz-Credential=*&X-Amz-Algorithm=*&X-Amz-SignedHeaders=host&X-Amz-Signature=*&X-Amz-Security-Token=*";
var websocket = new WebSocket(wsUri);
websocket.send('ping');

以下是控制台错误。 在收到握手响应之前，连接已关闭。

任何实现的示例链接都会有所帮助

Answer 1

我能够重现该错误。在检查chrome中的页面后，我寻找了使用网络选项卡使用Web套接字连接的示例（因为它内置了Web套接字调试器），该页面将显示以下内容：

基本上，这似乎是如何工作的，它向我们发送了恒定的图像流。

当我复制为cURL命令时，这就是结果

curl 'wss://devicefarm-interactive.us-west-2.amazonaws.com/?X-Amz-Date=20190518T211708Z&X-Amz-Credential=ASIAIGY76PSQXN5NZ3UA%2F20190518%2Fus-west-2%2Fdevicefarm%2Faws4_request&X-Amz-Algorithm=AWS4-HMAC-SHA256&arn=arn%3Aaws%3Adevicefarm%3Aus-west-2%111122223333%3Asession%3A8f4af46d-8f86-4dcc-8324-e691ce3723f3%2F6b4dc632-188f-45b9-be32-3e9aa6881ed3%2F00000&X-Amz-SignedHeaders=host&X-Amz-Signature=39b45e1489d44dfcb904d58e59e985844416061a828aa75750d5a67db36c55dd&X-Amz-Security-Token=someTokenValue&path=video' -H 'Pragma: no-cache' -H 'Origin: https://us-west-2.console.aws.amazon.com' -H 'Accept-Encoding: gzip, deflate, br' -H 'Accept-Language: en-US,en;q=0.9' -H 'Sec-WebSocket-Key: 60RGfCwWuULib6NmeoC2fA==' -H 'User-Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_13_6) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/74.0.3729.157 Safari/537.36' -H 'Upgrade: websocket' -H 'Sec-WebSocket-Extensions: permessage-deflate; client_max_window_bits' -H 'Cache-Control: no-cache' -H 'Connection: Upgrade' -H 'Sec-WebSocket-Version: 13' --compressed

当我执行以下CLI命令时，将端点取回：

aws devicefarm get-remote-access-session --arn arn:aws:devicefarm:us-west-2:111122223333:session:8f4af46d-8f86-4dcc-8324-e691ce3723f3/6b4dc632-188f-45b9-be32-3e9aa6881ed3/00000 --region us-west-2 --query remoteAccessSession.endpoint

"wss://devicefarm-interactive.us-west-2.amazonaws.com/?X-Amz-Date=20190518T212323Z&X-Amz-Credential=ASIAIU5CA7GBP5IEBR6Q%2F20190518%2Fus-west-2%2Fdevicefarm%2Faws4_request&X-Amz-Algorithm=AWS4-HMAC-SHA256&arn=arn%3Aaws%3Adevicefarm%3Aus-west-2%3A111122223333%3Asession%3A8f4af46d-8f86-4dcc-8324-e691ce3723f3%2F6b4dc632-188f-45b9-be32-3e9aa6881ed3%2F00000&X-Amz-SignedHeaders=host&X-Amz-Signature=aaaaqaqbbbb4e9f09b7312715c295a11b77bc0d9e7b21dcb61422a61f78a1f&X-Amz-Security-Token=FQoGZXIvYXdzEFcaDD2E90%2Bsp3i%2F%2F8cBbyKDA2EGKkFYSvXDR%2Fb7LfS%2FpQEPCWFVhe9eCOTSussvshjldx69CEFvVgV3JYtOvm2yu0UMVAxlDYlujvpMfSNwLx7FH%2B42k9qGYuvy5dQbVLg%2F%2BCRuyK9OjCxpD5pUfQ9b81U6LawcI2I1CekXeTgapRuTK9tCPcGtNOlxAvWQUVlyDGTtmqjz7vRlostquMoenNr9UB1v8jx0NSo1YIlrgY8YvZV2o5pcbYiI9I9CBD0%2F3snJZAyQtmPZkMT9gr9hI0jgX1X5MlOuarFmm%2F2Sn%2FH8L3ewMQXhvuho3OTNZTISBmUgJAbZSmQcazuDmjXqPkoNpYYcUb92vd2w5MbRfFSa5SHHXUMVcE5Wsop3BzwJyj%2FNyl59BdjFWdo82NgSFP6OBjYLjiux3hR2dx86ILJ9tfNMNfq0WXzL3Z%2BqecwMTxlxrLfZmPftsUDaO5RPtOP9uuI%2BPjfIOWOV7uFy9GjKG4HKFY%2BZVGgWhb1fVVG7%2BYHbPxgMaAKI3YJqmM9IIy8%2FdCjL74HnBQ%3D%3D%7CMjA1LjI1MS4yMzMuMTc5"

似乎已签名。我使用wscat尝试连接到它。

endpoint=$(aws devicefarm get-remote-access-session --arn arn:aws:devicefarm:us-west-2:111122223333:session:8f4af46d-8f86-4dcc-8324-e691ce3723f3/6b4dc632-188f-45b9-be32-3e9aa6881ed3/00000 --region us-west-2 --query remoteAccessSession.endpoint)

wscat -c $endpoint

错误： /usr/local/lib/node_modules/wscat/node_modules/ws/lib/websocket.js:455 throw new Error(无效的网址：$ {this.url} );

稍后，我需要花更多时间，但是我认为其中一些内容很有帮助，因此我将其发布了。