This is a quick and dirty module to interact with the Slack API.
Pull requests and other contributions would be welcome!
# One time setup
# Download the repository
# Unblock the zip
# Extract the PSSlack folder to a module path (e.g. $env:USERPROFILE\Documents\WindowsPowerShell\Modules\)
# Or, with PowerShell 5 or later or PowerShellGet:
Install-Module PSSlack
# Import the module.
Import-Module PSSlack #Alternatively, Import-Module \\Path\To\PSSlack
# Get commands in the module
Get-Command -Module PSSlack
# Get help
Get-Help Send-SlackMessage -Full
Get-Help about_PSSlack- PowerShell 3 or later
- A valid token or incoming webhook uri from Slack.
- Grab a test token
- Register a Slack app, grab a token - we'll try wrapping this in the module later
- Add an incoming webhook to your team, grab the Uri
# This example shows a crudely crafted message without any attachments,
# using parameters from Send-SlackMessage to construct the message.
#Previously set up Uri from https://<YOUR TEAM>.slack.com/apps/A0F7XDUAZ
$Uri = "Some incoming webhook uri from Slack"
Send-SlackMessage -Uri $Uri `
-Channel '@wframe' `
-Parse full `
-Text 'Hello @wframe, join me in #devnull!'
# Send a message to @wframe (not a channel), parsing the text to linkify usernames and channels 
# Search for a message containing PowerShell, sorting results by timestamp
Find-SlackMessage -Token $Token `
-Query 'PowerShell' `
-SortBy timestamp 
# Search for a message containing PowerShell
# Results are sorted by best match by default
# Notice the extra properties and previous/next messages
Find-SlackMessage -Token $Token `
-Query 'PowerShell' |
Select-Object -Property * 
You could use this simply to search Slack from the CLI, or in an automated solution that might avoid posting if certain content is already found in Slack.
# This is a simple example illustrating some common options
# when constructing a message attachment
# giving you a richer message
$Token = 'A token. maybe from https://api.slack.com/docs/oauth-test-tokens'
New-SlackMessageAttachment -Color $([System.Drawing.Color]::red) `
-Title 'The System Is Down' `
-TitleLink https://www.youtube.com/watch?v=TmpRs7xN06Q `
-Text 'Please Do The Needful' `
-Pretext 'Everything is broken' `
-AuthorName 'SCOM Bot' `
-AuthorIcon 'http://ramblingcookiemonster.github.io/images/tools/wrench.png' `
-Fallback 'Your client is bad' |
New-SlackMessage -Channel '@wframe' `
-IconEmoji :bomb: |
Send-SlackMessage -Token $Token 
Notice that the title is clickable. You might link to...
- The alert in question
- A logging solution query
- A dashboard
- Some other contextual link
- Strongbad
# This example demonstrates that you can chain new attachments
# together to form a multi-attachment message
$Token = 'A token. maybe from https://api.slack.com/docs/oauth-test-tokens'
New-SlackMessageAttachment -Color $_PSSlackColorMap.red `
-Title 'The System Is Down' `
-TitleLink https://www.youtube.com/watch?v=TmpRs7xN06Q `
-Text 'Everybody panic!' `
-Pretext 'Everything is broken' `
-Fallback 'Your client is bad' |
New-SlackMessageAttachment -Color $([System.Drawing.Color]::Orange) `
-Title 'The Other System Is Down' `
-TitleLink https://www.youtube.com/watch?v=TmpRs7xN06Q `
-Text 'Please Do The Needful' `
-Fallback 'Your client is bad' |
New-SlackMessage -Channel '@wframe' `
-IconEmoji :bomb: `
-AsUser `
-Username 'SCOM Bot' |
Send-SlackMessage -Token $Token 
Notice that we can chain multiple New-SlackMessageAttachments together.
# This example illustrates a pattern where you might
# want to send output from a script; you might
# include errors, successful items, or other output
# Pretend we're in a script, and caught an exception of some sort
$Fail = [pscustomobject]@{
samaccountname = 'bob'
operation = 'Remove privileges'
status = "An error message"
timestamp = (Get-Date).ToString()
}
# Create an array from the properties in our fail object
$Fields = @()
foreach($Prop in $Fail.psobject.Properties.Name)
{
$Fields += @{
title = $Prop
value = $Fail.$Prop
short = $true
}
}
$Token = 'A token. maybe from https://api.slack.com/docs/oauth-test-tokens'
# Construct and send the message!
New-SlackMessageAttachment -Color $([System.Drawing.Color]::Orange) `
-Title 'Failed to process account' `
-Fields $Fields `
-Fallback 'Your client is bad' |
New-SlackMessage -Channel 'devnull' |
Send-SlackMessage -Uri $uri
# We build up a pretend error object, and send each property to a 'Fields' array
# Creates an attachment with the fields from our error
# Creates a message fromthat attachment and sents it with a uri 
To save time and typing, you can save a token or uri to a config file (protected via DPAPI) and a module variable.
This is used as the default for commands, and is reloaded if you open a new PowerShell session.
# Save a Uri and Token.
# If both are specified, token takes precedence.
Set-PSSlackConfig -Uri 'SomeSlackUri' -Token 'SomeSlackToken'
# Read the current cofig
Get-PSSlackConfigCurrently evaluating .NET Core / Cross-platform functionality. The following will not work initially:
- Serialization of URIs and tokens via Set-PSSlackConfig. Set these values per-session if needed
- [System.Drawing.Color]::SomeColor shortcut. Use the provided $_PSSlackColorMap hash to simplify this. E.g. $_PSSlackColorMap.red
There are a good number of Slack functions out there, including jgigler's PowerShell.Slack and Steven Murawski's Slack. We borrowed some ideas and code from these - thank you!
If you want to go beyond interacting with the Slack API, you might consider using a bot