使用Slack RTM api发布消息

Question

我正在学习这里的教程，https://slackapi.github.io/node-slack-sdk/bots#posting-a-message，我很困惑为什么我不能让这部分教程代码工作。我复制并粘贴了这一部分的代码，如下所示

var RtmClient = require('@slack/client').RtmClient;
var RTM_CLIENT_EVENTS = require('@slack/client').CLIENT_EVENTS.RTM;

var bot_token = process.env.SLACK_BOT_TOKEN || ''; //I know the problem is not here.

var rtm = new RtmClient(bot_token);
rtm.start();

var channel = "#general"; //could also be a channel, group, DM, or user ID (C1234), or a username (@don)

// you need to wait for the client to fully connect before you can send messages
rtm.on(RTM_CLIENT_EVENTS.RTM_CONNECTION_OPENED, function () {
  rtm.sendMessage("Hello!", channel);
});

由于教程代码的第一部分工作正常，因此问题肯定来自最后3行代码。大概这是这次活动的一个问题。我的错误消息是

Unhandled rejection Error
    at RTMClient.handleMessageAck [as _handleMessageAck] (/Users/mg/projects/slack_projects/games/s
lack_connect_four/node_modules/@slack/client/lib/clients/rtm/client.js:496:40)
    at RTMClient._handleWsMessageViaEventHandler (/Users/mg/projects/slack_projects/games/slack_con
nect_four/node_modules/@slack/client/lib/clients/rtm/client.js:459:12)
    at RTMClient.handleWsMessage (/Users/mg/projects/slack_projects/games/slack_connect_four/node_m
odules/@slack/client/lib/clients/rtm/client.js:419:10)
    at WebSocket.wrapper (/Users/mg/projects/slack_projects/games/slack_connect_four/node_modules/l
odash/lodash.js:4968:19)
    at emitTwo (events.js:106:13)
    at WebSocket.emit (events.js:191:7)
    at Receiver.ontext (/Users/mg/projects/slack_projects/games/slack_connect_four/node_modules/ws/
lib/WebSocket.js:841:10)
    at /Users/mg/projects/slack_projects/games/slack_connect_four/node_modules/ws/lib/Receiver.js:5
36:18
    at Receiver.applyExtensions (/Users/mg/projects/slack_projects/games/slack_connect_four/node_mo
dules/ws/lib/Receiver.js:371:5)
    at /Users/mg/projects/slack_projects/games/slack_connect_four/node_modules/ws/lib/Receiver.js:5
08:14
    at Receiver.flush (/Users/mg/projects/slack_projects/games/slack_connect_four/node_modules/ws/l
ib/Receiver.js:347:3) at Receiver.finish (/Users/mg/projects/slack_projects/games/slack_connect_four/node_modules/ws/
lib/Receiver.js:541:12)
    at Receiver.expectHandler (/Users/mg/projects/slack_projects/games/slack_connect_four/node_modu
les/ws/lib/Receiver.js:499:31)
    at Receiver.add (/Users/mg/projects/slack_projects/games/slack_connect_four/node_modules/ws/lib
/Receiver.js:103:24)
    at TLSSocket.realHandler (/Users/mg/projects/slack_projects/games/slack_connect_four/node_modul
es/ws/lib/WebSocket.js:825:20)
    at emitOne (events.js:96:13)

我真的很感谢任何人的帮助。

Answer 1

可能你的机器人还没有加入#general频道。先把他请到频道上去。

Answer 2

这篇文章可能已经过时了，但我想分享我在这个错误中的经验。我也在测试这段代码，并且我使用了一个私有通道。即使机器人已经是通道的成员，它也会抛出此错误。然后我试着使用一个公共频道，然后它通过了。我希望这能帮到你。

Answer 3

您不能使用频道名称、用户名或用户ids。请改用通道/组/DM ids。

更改：

var channel = "#general";

至：

var channel = "C--------";

您可以从您的频道的URL中获取此频道ID：

https://yourworkspace.slack.com/messages/C-------/details/

并且你的机器人必须被添加到目标通道中，如下所示：

• 在你的应用程序设置页面上，单击导航菜单中的OAuth和权限设置项。
• 在作用域部分，添加聊天:写入权限范围，然后单击保存更改。
• 现在你已经更改了你的应用程序的作用域，你需要重新安装它-你应该会在屏幕顶部看到一个黄色横幅，告诉你单击此处重新安装你的应用程序。单击它，然后按照权限授权页面进行操作。
• 您将被重定向回OAuth & permissions页面，您可以在该页面的顶部看到您的工作区令牌-存储此令牌以供稍后使用。

SLACK API REFERENCE

此代码将按预期工作：

var RtmClient = require('@slack/client').RtmClient;
var CLIENT_EVENTS = require('@slack/client').CLIENT_EVENTS;

var rtm = new RtmClient('.....'); // your token
rtm.start();

let channel = 'C--------' ; //your channel

rtm.on(CLIENT_EVENTS.RTM.RTM_CONNECTION_OPENED, function () {
  rtm.sendMessage("Hello stack!", channel);
});