websocket连接失败，vaadin

Question

我编写了一个网站，作为我的 android 应用程序的 websocket 客户端，它在我的 WiFi 网络中充当 websocket 服务器。最初我只是用 javascript/jquery 编写的，它已经可以正常工作了，但是因为我对 vaadin 很着迷，所以我用 vaadin 完全重写了它，它已经可以在本地 tomcat 7 或 8 上工作，但不能在远程 tomcat 7 上工作或 8. android 服务器的 onOpen 方法永远不会被调用。 jquery 版本的服务器与 vaadin 版本的服务器相同，但是当我尝试启动我的页面时，我收到此错误并且页面没有连接到我的手机，虽然我可以 ping 我的手机：

vaadinPush.debug.js:11276: WebSocket connection to 'ws://serialcall.rdroid.info/PUSH/?v-uiId=3&v-csrfToken=18797926-2579-4599-a0af-29729f9deb88&X-Atmosphere-tracking-id=0&X-Atmosphere-Framework=2.1.5.vaadin4-jquery&X-Atmosphere-Transport=websocket&X-Atmosphere-TrackMessageSize=true&X-Cache-Date=0&Content-Type=application/json;%20charset=UTF-8&X-atmo-protocol=true' failed: Error during WebSocket handshake: Unexpected response code: 500

这是非工作远程服务器上的 vaadin 日志信息

371ms   Queuing push message: {"csrfToken":"0b112c17-8c20-4307-8d2b-871589d720a6", "rpc":[["505","com.vaadin.shared.ui.ui.UIServerRpc","resize",["923","1280","1280","923"]],["506","org.vaadin.jouni.animator.client.AnimatorServerRpc","preserveStyles",[{"useKeyframeAnimation":false, "animationTarget":"546", "duration":"2000", "delay":"0", "css":{"properties":{"opacity":"0.2"}}, "easing":"DEFAULT", "id":"25", "iterationCount":"1", "preserveStyles":true}]]], "syncId":1}
720ms   Push connection closed
721ms   Push connection using primary method (websocket) failed. Trying with long-polling
1131ms  Push connection established using long-polling
1132ms  Sending push message: {"csrfToken":"0b112c17-8c20-4307-8d2b-871589d720a6", "rpc":[["505","com.vaadin.shared.ui.ui.UIServerRpc","resize",["923","1280","1280","923"]],["506","org.vaadin.jouni.animator.client.AnimatorServerRpc","preserveStyles",[{"useKeyframeAnimation":false, "animationTarget":"546", "duration":"2000", "delay":"0", "css":{"properties":{"opacity":"0.2"}}, "easing":"DEFAULT", "id":"25", "iterationCount":"1", "preserveStyles":true}]]], "syncId":1}
1154ms  No onClose was received before reconnect. Forcing state to closed.

这是 vaadin 日志消息在工作本地服务器上的外观：

1008ms  Making UIDL Request with params: {"csrfToken":"6be927e0-1e38-407d-b8fe-744d83a23e43", "rpc":[["1614","com.vaadin.shared.ui.ui.UIServerRpc","resize",["923","1280","1280","923"]],["1615","org.vaadin.jouni.animator.client.AnimatorServerRpc","preserveStyles",[{"useKeyframeAnimation":false, "animationTarget":"1655", "duration":"2000", "delay":"0", "css":{"properties":{"opacity":"0.2"}}, "easing":"DEFAULT", "id":"20", "iterationCount":"1", "preserveStyles":true}]]], "syncId":1}
1009ms  Queuing push message: {"csrfToken":"6be927e0-1e38-407d-b8fe-744d83a23e43", "rpc":[["1614","com.vaadin.shared.ui.ui.UIServerRpc","resize",["923","1280","1280","923"]],["1615","org.vaadin.jouni.animator.client.AnimatorServerRpc","preserveStyles",[{"useKeyframeAnimation":false, "animationTarget":"1655", "duration":"2000", "delay":"0", "css":{"properties":{"opacity":"0.2"}}, "easing":"DEFAULT", "id":"20", "iterationCount":"1", "preserveStyles":true}]]], "syncId":1}
1303ms  Push connection established using websocket

我使用 tootallnate 作为 websocket 客户端，并且我在服务器和本地计算机上具有相同的 tomcat-version 和相同的 javaversion，即使我禁用了防火墙。没有抛出异常，并且无法找出它为什么不起作用。

任何想法我做错了什么？

Answer 1

看起来您已将应用部署到没有公共 IP 的 Jelastic 实例中，这意味着所有请求都由 nginx 代理。如here 所述，您必须获取公共 IP 才能让您的应用与 Jelastic 中的 WebSockets 一起工作。