我正在尝试使用PowerShell V2(测试目的)来启动Slack的实时消息传递(rtm)实例。但是根据Slack的常见问题解答,要连接到他们的rtm API,我需要通过Websocket客户端使用wss://协议来传输相关的事件。我也试图使它成为异步连接(接收和连接)。
这不起作用:
$webSock = New-Object System.Net.WebSocket.ClientWebSocket
$client = New-Object System.Threading.CancellationToken
另一件事是我需要一个函数来从PowerShell V2中的JSON转换。
我尝试过使用它,但它也不起作用:
function ConvertFrom-Json20([object] $item){
add-type -assembly system.web.extensions
$ps_js=new-object system.web.script.serialization.javascriptSerializer
#The comma operator is the array construction operator in PowerShell
return ,$ps_js.DeserializeObject($item)
}
答案 0 :(得分:4)
可以使用.NET的System.Net.WebSockets.ClientWebSocket
类来执行此操作。您需要运行Windows 8或Server 2012或更高版本作为底层操作系统才能使用此类,因此我认为您至少拥有PowerShell v3(因此ConvertFrom-Json
cmdlet)。您还需要使用System.ArraySegment
.NET类。
我创建了一个简单的框架,演示了如何使用各种类与PowerShell脚本中的Slack RTM API进行交互。你可以在这里找到GitHub上的项目: https://github.com/markwragg/Powershell-SlackBot
我还在这里更详细地写了一篇博文:http://wragg.io/powershell-slack-bot-using-the-real-time-messaging-api/
答案 1 :(得分:3)
奇怪的是,我最近也有同样的需求。感谢Mark Wragg及其有用的链接,这里有一些快速的代码可以实现这一目标。您至少需要Windows 8和Server 2012才能使这些工作正常。
Try{
Do{
$URL = 'ws://YOUR_URL_HERE/API/WebSocketHandler.ashx'
$WS = New-Object System.Net.WebSockets.ClientWebSocket
$CT = New-Object System.Threading.CancellationToken
$WS.Options.UseDefaultCredentials = $true
#Get connected
$Conn = $WS.ConnectAsync($URL, $CT)
While (!$Conn.IsCompleted) {
Start-Sleep -Milliseconds 100
}
Write-Host "Connected to $($URL)"
$Size = 1024
$Array = [byte[]] @(,0) * $Size
#Send Starting Request
$Command = [System.Text.Encoding]::UTF8.GetBytes("ACTION=Command")
$Send = New-Object System.ArraySegment[byte] -ArgumentList @(,$Command)
$Conn = $WS.SendAsync($Send, [System.Net.WebSockets.WebSocketMessageType]::Text, $true, $CT)
While (!$Conn.IsCompleted) {
#Write-Host "Sleeping for 100 ms"
Start-Sleep -Milliseconds 100
}
Write-Host "Finished Sending Request"
#Start reading the received items
While ($WS.State -eq 'Open') {
$Recv = New-Object System.ArraySegment[byte] -ArgumentList @(,$Array)
$Conn = $WS.ReceiveAsync($Recv, $CT)
While (!$Conn.IsCompleted) {
#Write-Host "Sleeping for 100 ms"
Start-Sleep -Milliseconds 100
}
#Write-Host "Finished Receiving Request"
Write-Host [System.Text.Encoding]::utf8.GetString($Recv.array)
}
} Until ($WS.State -ne 'Open')
}Finally{
If ($WS) {
Write-Host "Closing websocket"
$WS.Dispose()
}
}