断开连接后 Strophe.js 未重新连接

【问题标题】：Strophe.js not reconnecting after disconnect断开连接后 Strophe.js 未重新连接
【发布时间】：2019-02-22 10:48:48
【问题描述】：

我正在从事一个项目，该项目在 wordpress 后端（用于存储消息、帖子）、用于用户交互的 Angular 前端 (Angluar 6x) 和用于从 Web 应用程序内进行聊天通信的 eJabber 服务器之间进行复杂交互。
为了实现这一点，我正在尝试将 strophe.js 集成到 Angular 框架中。
我使用的身份验证方法很复杂。当一个新用户通过合适的（角度）表单注册到 wordpress 后端时，我已经设置了钩子，这些钩子也自动将新用户订阅到我的本地 eJabberd 服务器。为了管理身份验证，为了避免最终用户输入两次他/她的凭据，我在 eJabberd 中设置了一个自定义 extauth 脚本（基于this），它与自定义 wordpress rest API 端点并行工作（I'我为此使用 JWT）。
extauth 脚本运行良好，我可以使用各种聊天客户端（Adium、Apple 的消息等）成功连接到本地 eJabberd 服务器。 我也可以从我的网络应用程序中连接（如前所述，使用 strophe）到 eJabber。

这是我用来管理连接的代码的 sn-p (ChatPanel.Service.ts)：

import { Injectable } from '@angular/core';
import { HttpClient } from '@angular/common/http';

import { Strophe, $pres } from 'strophe.js';

import { EJABBERD } from 'app/api/api.module';

var chatPanelServiceInstance: any = null;

@Injectable()
export class ChatPanelService
{
    contacts: any[];
    chats: any[];
    user: any;
    client: any;

    // Private
    private _xmppConnectionsString: String = "ws://" + EJABBERD.host + ":5280/ws";
    private _xmppConnection: any = null;

    /**
     * Constructor
     */
    constructor(
    )
    {
        chatPanelServiceInstance = this;
        Strophe.log = (level: any, msg: string) => { console.log(level + ": " + msg); };
    }

    /**
     * Log into eJabberd
     *
     * @param {string} jid      user name
     * @param {string} password password (actually, the user token)
     */
    login(jid: string, password: string): void
    {
        if ( ! this._xmppConnection ) {
            this._xmppConnection = new Strophe.Connection( this._xmppConnectionsString , {'keepalive': true});
        }

        this._xmppConnection.connect(jid+'@'+EJABBERD.host, password, this._onConnect);
    }

    /**
     * Disconnect from eJabberd
     */
    logOut(): void
    {
        if ( this._xmppConnection ) {
            this._xmppConnection.options.sync = true;
            this._xmppConnection.flush();
            this._xmppConnection.disconnect("logout");
            this._xmppConnection = null;
        }
    }

    /**
     * eJabberd XMPP message Handler
     * @param {string} msg Message received
     */
    private _onMessage(msg: string): boolean
    {
        console.log("eJabber Msg: " + msg);

        return true;
    }

    /**
     * eJabberd connection Handler
     * @param {any} status connection result
     */
    private _onConnect(status: any): void
    {
        switch (status) {
            case Strophe.Status.CONNECTING:
                console.log("Connecting to eJabberd...");
                break;
            case Strophe.Status.CONNFAIL:
                console.log("eJabberd connection failed!");
                break;
            case Strophe.Status.DISCONNECTING:
                console.log("Disconnecting from eJabberd...");
                break;
            case Strophe.Status.DISCONNECTED:
                console.log("Disconnected from eJabberd");
                break;
            case Strophe.Status.CONNECTED:
                //handler function  [ onMessage() ]  will be called when the user recieves a new message
                chatPanelServiceInstance._xmppConnection.addHandler(chatPanelServiceInstance._onMessage, null, 'message');

                //Setting our presence in the server. so that everyone can know that we are online
                chatPanelServiceInstance._xmppConnection.send($pres().tree());

                console.log("eJabberd connected!");
                break;
            case Strophe.Status.AUTHENTICATING:
                console.log("eJabberd authenticating...");
                break;
            case Strophe.Status.AUTHFAIL:
                console.log("eJabberd authentication failed!");
                break;
            case Strophe.Status.ERROR:
                console.log("eJabberd generic connection error!");
                break;
            case Strophe.Status.ATTACHED:
                console.log("eJabberd connection attached!");
                break;
            case Strophe.Status.REDIRECT:
                console.log("eJabberd connection redirected!");
                break;
            case Strophe.Status.CONNTIMEOUT:
                console.log("eJabberd connection timeout!");
                break;
            default:
                console.log("eJabberd: Unknow connection status");
        }
    }

当我在注销后尝试重新连接到服务器时出现问题。

当我从我的 Web 应用程序中注销时（即调用我的 chatpanel.service 中的 logout()），如果我尝试再次登录，我不会收到来自 ejabber 服务器的响应。显然，服务器停止侦听来自 strophe 的任何进一步请求。
我已经尝试过使用 websockets 和 BOSH。最后的结果是一样的。

这是浏览器控制台的快照：

First, successfull, login (WebSocket)
[Log] Connecting to eJabberd... (main.js, line 8666)
[Log] 1: Websocket open (main.js, line 8626)
[Log] 1: _connect_cb was called (main.js, line 8626)
[Log] 1: _dataRecv called (main.js, line 8626)
[Log] 1: SASL authentication succeeded. (main.js, line 8626)
[Log] 1: _dataRecv called (main.js, line 8626, x4)
[Log] eJabberd connected! (main.js, line 8687)
[Log] 1: _dataRecv called (main.js, line 8626) 

Logout...
[Log] Disconnecting from eJabberd... (main.js, line 8672)
[Log] 1: Disconnect was called because: logout (main.js, line 8626)
[Log] 1: _doDisconnect was called (main.js, line 8626)
[Log] 1: WebSockets _doDisconnect was called (main.js, line 8626)
[Log] Disconnected from eJabberd (main.js, line 8675)
[Log] 1: Websocket closed (main.js, line 8626)

Second attempt (fails, WebSocket)
[Log] Connecting to eJabberd... (main.js, line 8666)
[Log] 1: Websocket open (main.js, line 8626)
[Log] 1: _connect_cb was called (main.js, line 8626)
[Log] 1: _dataRecv called (main.js, line 8626)
[Log] eJabberd authentication failed! (main.js, line 8693)
[Log] 3: WebSocket stream error: connection-timeout - Idle connection (main.js, line 8626)
[Log] eJabberd generic connection error! (main.js, line 8696)
[Log] 1: _doDisconnect was called (main.js, line 8626)
[Log] 1: WebSockets _doDisconnect was called (main.js, line 8626)
[Log] Disconnected from eJabberd (main.js, line 8675)
[Log] 1: Websocket closed (main.js, line 8626)


Successful first login (BOSH)
[Log] Connecting to eJabberd... (main.js, line 8666)
[Log] 0: _throttledRequestHandler called with 1 requests (main.js, line 8626)
[Log] 0: request id 1.0 posting (main.js, line 8626)
[Log] 0: request id 1.0 state changed to 1 (main.js, line 8626)
[Log] 0: request id 1.1 state changed to 2 (main.js, line 8626)
[Log] 0: request id 1.1 state changed to 3 (main.js, line 8626)
[Log] 0: request id 1.1 state changed to 4 (main.js, line 8626)
[Log] 0: removing request (main.js, line 8626)
[Log] 0: _throttledRequestHandler called with 0 requests (main.js, line 8626)
[Log] 0: request id 1 should now be removed (main.js, line 8626)
[Log] 0: request id 1.1 got 200 (main.js, line 8626)
[Log] 1: _connect_cb was called (main.js, line 8626)
[Log] 0: _throttledRequestHandler called with 0 requests (main.js, line 8626)
[Log] 0: _throttledRequestHandler called with 1 requests (main.js, line 8626)
[Log] 0: request id 2.0 posting (main.js, line 8626)
[Log] 0: request id 2.0 state changed to 1 (main.js, line 8626)
[Log] 0: request id 2.1 state changed to 2 (main.js, line 8626)
[Log] 0: request id 2.1 state changed to 3 (main.js, line 8626)
[Log] 0: request id 2.1 state changed to 4 (main.js, line 8626)
[Log] 0: removing request (main.js, line 8626)
[Log] 0: _throttledRequestHandler called with 0 requests (main.js, line 8626)
[Log] 0: request id 2 should now be removed (main.js, line 8626)
[Log] 0: request id 2.1 got 200 (main.js, line 8626)
[Log] 1: _dataRecv called (main.js, line 8626)
[Log] 1: SASL authentication succeeded. (main.js, line 8626)
[Log] 0: _throttledRequestHandler called with 0 requests (main.js, line 8626)
[Log] 0: _throttledRequestHandler called with 1 requests (main.js, line 8626)
[Log] 0: request id 3.0 posting (main.js, line 8626)
[Log] 0: request id 3.0 state changed to 1 (main.js, line 8626)
[Log] 0: request id 3.1 state changed to 2 (main.js, line 8626)
[Log] 0: request id 3.1 state changed to 3 (main.js, line 8626)
[Log] 0: request id 3.1 state changed to 4 (main.js, line 8626)
[Log] 0: removing request (main.js, line 8626)
[Log] 0: _throttledRequestHandler called with 0 requests (main.js, line 8626)
[Log] 0: request id 3 should now be removed (main.js, line 8626)
[Log] 0: request id 3.1 got 200 (main.js, line 8626)
[Log] 1: _dataRecv called (main.js, line 8626)
[Log] 0: _throttledRequestHandler called with 0 requests (main.js, line 8626)
[Log] 0: _throttledRequestHandler called with 1 requests (main.js, line 8626)
[Log] 0: request id 4.0 posting (main.js, line 8626)
[Log] 0: request id 4.0 state changed to 1 (main.js, line 8626)
[Log] 0: request id 4.1 state changed to 2 (main.js, line 8626)
[Log] 0: request id 4.1 state changed to 3 (main.js, line 8626)
[Log] 0: request id 4.1 state changed to 4 (main.js, line 8626)
[Log] 0: removing request (main.js, line 8626)
[Log] 0: _throttledRequestHandler called with 0 requests (main.js, line 8626)
[Log] 0: request id 4 should now be removed (main.js, line 8626)
[Log] 0: request id 4.1 got 200 (main.js, line 8626)
[Log] 1: _dataRecv called (main.js, line 8626)
[Log] 0: _throttledRequestHandler called with 0 requests (main.js, line 8626)
[Log] 0: _throttledRequestHandler called with 1 requests (main.js, line 8626)
[Log] 0: request id 5.0 posting (main.js, line 8626)
[Log] 0: request id 5.0 state changed to 1 (main.js, line 8626)
[Log] 0: request id 5.1 state changed to 2 (main.js, line 8626)
[Log] 0: request id 5.1 state changed to 3 (main.js, line 8626)
[Log] 0: request id 5.1 state changed to 4 (main.js, line 8626)
[Log] 0: removing request (main.js, line 8626)
[Log] 0: _throttledRequestHandler called with 0 requests (main.js, line 8626)
[Log] 0: request id 5 should now be removed (main.js, line 8626)
[Log] 0: request id 5.1 got 200 (main.js, line 8626)
[Log] 1: _dataRecv called (main.js, line 8626)
[Log] 0: _throttledRequestHandler called with 0 requests (main.js, line 8626)
[Log] eJabberd connected! (main.js, line 8687)
[Log] 0: _throttledRequestHandler called with 1 requests (main.js, line 8626)
[Log] 0: request id 6.0 posting (main.js, line 8626)
[Log] 0: request id 6.0 state changed to 1 (main.js, line 8626)
[Log] 0: request id 6.1 state changed to 2 (main.js, line 8626)
[Log] 0: request id 6.1 state changed to 3 (main.js, line 8626)
[Log] 0: request id 6.1 state changed to 4 (main.js, line 8626)
[Log] 0: removing request (main.js, line 8626)
[Log] 0: _throttledRequestHandler called with 0 requests (main.js, line 8626)
[Log] 0: request id 6 should now be removed (main.js, line 8626)
[Log] 0: request id 6.1 got 200 (main.js, line 8626)
[Log] 1: _dataRecv called (main.js, line 8626)
[Log] 1: no requests during idle cycle, sending blank request (main.js, line 8626)
[Log] 0: _throttledRequestHandler called with 1 requests (main.js, line 8626)
[Log] 0: request id 7.0 posting (main.js, line 8626)
[Log] 0: request id 7.0 state changed to 1 (main.js, line 8626)

Logout...
[Log] Disconnecting from eJabberd... (main.js, line 8672)
[Log] 1: Disconnect was called because: logout (main.js, line 8626)
[Log] 1: _sendTerminate was called (main.js, line 8626)
[Log] 0: _throttledRequestHandler called with 2 requests (main.js, line 8626)
[Log] 0: _processRequest: first request has readyState of 1 (main.js, line 8626)
[Log] 0: request id 17.0 posting (main.js, line 8626)
[Log] 0: request id 17.0 state changed to 1 (main.js, line 8626)
[Log] 0: request id 17.0 state changed to 4 (main.js, line 8626)
[Log] 0: removing request (main.js, line 8626)
[Log] 0: _throttledRequestHandler called with 1 requests (main.js, line 8626)
[Log] 0: _processRequest: first request has readyState of 1 (main.js, line 8626)
[Log] 0: request id 17 should now be removed (main.js, line 8626)
[Log] 0: request id 17.0 got 200 (main.js, line 8626)
[Log] 1: _dataRecv called (main.js, line 8626)
[Log] 0: request id 16.1 state changed to 2 (main.js, line 8626)
[Log] 0: request id 16.1 state changed to 3 (main.js, line 8626)
[Log] 0: request id 16.1 state changed to 4 (main.js, line 8626)
[Log] 0: removing request (main.js, line 8626)
[Log] 0: _throttledRequestHandler called with 0 requests (main.js, line 8626)
[Log] 0: request id 16 should now be removed (main.js, line 8626)
[Log] 0: request id 16.1 got 200 (main.js, line 8626)
[Log] 1: _dataRecv called (main.js, line 8626)
[Log] 1: _doDisconnect was called (main.js, line 8626)
[Log] Disconnected from eJabberd (main.js, line 8675)

Second attempt (after logout, unsuccessful, BOSH)
[Log] Connecting to eJabberd... (main.js, line 8666)
[Log] 0: _throttledRequestHandler called with 1 requests (main.js, line 8626)
[Log] 0: request id 18.0 posting (main.js, line 8626)
[Log] 0: request id 18.0 state changed to 1 (main.js, line 8626)
[Error] Failed to load resource: the server responded with a status of 404 (Not Found) (b7e98bdb6711295ac7cd2c2d7a139415, line 0)
[Log] 0: request id 18.1 state changed to 2 (main.js, line 8626)
[Log] 0: request id 18.1 state changed to 3 (main.js, line 8626)
[Log] 0: request id 18.1 state changed to 4 (main.js, line 8626)
[Log] 0: removing request (main.js, line 8626)
[Log] 0: _throttledRequestHandler called with 0 requests (main.js, line 8626)
[Log] 0: request id 18 should now be removed (main.js, line 8626)
[Log] 0: request id 18.1 got 200 (main.js, line 8626)
[Log] 1: _connect_cb was called (main.js, line 8626)
[Log] 3: Server did not offer a supported authentication mechanism (main.js, line 8626)
[Log] eJabberd connection failed! (main.js, line 8669)
[Log] 1: _doDisconnect was called (main.js, line 8626)
[Log] Disconnected from eJabberd (main.js, line 8675)

如您所见，使用 Bosh 时，调试器告诉我服务器没有提供任何合适的身份验证方法。
显然服务器不再监听传入的连接请求。但是，奇怪的是，如果我重新启动服务器，重新连接就会成功。看起来 strophe.js 即使在断开连接过程完成后仍然保持打开状态，关闭它的唯一方法是停止服务器。

我不确定这是 strophe.js 问题还是 ejabberd 配置问题，但我更倾向于考虑客户端问题（或我的代码中缺少的东西），因为外部客户端可以完美连接到服务器。

任何提示将不胜感激。

【问题讨论】：

    标签： angular ejabberd strophe


    【解决方案1】：

    知道了。
    我在这里发帖，作为对那些面临类似问题的人的回答。
    问题不是 Strophe.js，而是 jabber 服务器的配置。问题是缓存。

    来自 eJabber 文档 (here)

    auth_use_cache: false|true: 从 ejabberd 17.06 开始，缓存具有 接受了彻底的大修。一组新的而不是 extauth_cache variables 描述缓存行为，默认值为 now 真的。请注意，缓存会干扰维护的能力 每个帐户多个密码。因此，如果您的身份验证机制 支持应用程序特定的密码，缓存必须禁用。

    eJabberd 被配置为默认情况下对适用的所有内容使用缓存。
    因为，当我从我的 Web 应用程序注销时，我使用于身份验证的旧 JSON Web 令牌无效，所以 ejabber 会根据缓存值检查新凭据，从而发现不匹配。
    解决方案是像这样禁用缓存（在 ejabberd.yml 中）auth_use_cache: false

    【讨论】：

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