How to send the image in clipboard into figure bed just by Powershell

Question

I want to use the Powershell to send the image in clipboard into figure bed(such as http://stackoverflow.com/upload/image).If I'm in Mathematica,I can get the image in clipboard,then use this code send the image into picture bed

URLRead[HTTPRequest["http://stackoverflow.com/upload/image", <|
   "Body" -> {"image" -> imageInClipboard}|>], "Body"]

But this method is poor efficiency. So I hope do this just by Powershell.

$img=Get-Clipboard -Format image
Invoke-RestMethod -Uri http://stackoverflow.com/upload/image -ContentType "image/png" -Body $img

But it don't work..And a markdown result like ![](imagelink) is expected.Anydody can give me a hand?

Answer 1

I wrote this script for you:

$img = Get-Clipboard -Format Image
If (-not $img) {Throw 'No image on the clipboard'}
$ms = New-Object System.IO.MemoryStream
$img.Save($ms, [System.Drawing.Imaging.ImageFormat]::Png)
$ms.Position = 0
Add-Type -AssemblyName System.Net.Http
$httpClientHandler = New-Object System.Net.Http.HttpClientHandler
$httpClient = New-Object System.Net.Http.HttpClient $httpClientHandler
$contentDispositionHeaderValue = New-Object System.Net.Http.Headers.ContentDispositionHeaderValue "form-data"
$contentDispositionHeaderValue.Name = "file"
$contentDispositionHeaderValue.FileName = 'image.png'
$streamContent = New-Object System.Net.Http.StreamContent $ms
$streamContent.Headers.ContentDisposition = $contentDispositionHeaderValue
$streamContent.Headers.ContentType = New-Object System.Net.Http.Headers.MediaTypeHeaderValue 'image/png'
$content = New-Object System.Net.Http.MultipartFormDataContent
$content.Add($streamContent)
$response = $httpClient.PostAsync('https://stackoverflow.com/upload/image?https=true', $content).Result
$response.Content.ReadAsStringAsync().Result -match '"(.*)"' | Out-Null
"![]($($matches[1]))"

First, it converts the image on the clipboard to PNG. Then it takes advantage of some .NET web utility classes to get the multipart/form-data structure set up just right - this section is adapted from Mario Majčica's blog post. Once that's all finagled, it makes the POST request. Finally, it uses regex to parse the small resulting HTML document to extract the URL of the newly uploaded image, which it prints to the console. If you'd like to copy the Markdown fragment directly to the clipboard, tack on | scb to the last line.

To run the script, save it as a .ps1 file, e.g. seimage.ps1. If you haven't already, follow the instructions in the Enabling Scripts section of the PowerShell tag wiki. Then you can open a PowerShell prompt in the containing folder and execute it:

.\seimage.ps1

Answer 2

I just compile the code here for reading after some guidence from Ben N

$img = Get-Clipboard -Format Image
If (-not $img) {
[void] [System.Reflection.Assembly]::LoadWithPartialName("System.Windows.Forms")
$objNotifyIcon = New-Object System.Windows.Forms.NotifyIcon 
$objNotifyIcon.Icon = [System.Drawing.SystemIcons]::Warning
$objNotifyIcon.BalloonTipIcon = "Error" 
$objNotifyIcon.BalloonTipText = 'No image on the clipboard' 
$objNotifyIcon.BalloonTipTitle = "File Not Found"
$objNotifyIcon.Visible = $True 
$objNotifyIcon.ShowBalloonTip(10000)
}
Else{
    $ms = New-Object System.IO.MemoryStream
    $img.Save($ms, [System.Drawing.Imaging.ImageFormat]::Png)
    $ms.Position = 0
    Add-Type -AssemblyName System.Net.Http
    $httpClientHandler = New-Object System.Net.Http.HttpClientHandler
    $httpClient = New-Object System.Net.Http.HttpClient $httpClientHandler
    $contentDispositionHeaderValue = New-Object System.Net.Http.Headers.ContentDispositionHeaderValue "form-data"
    $contentDispositionHeaderValue.Name = "file"
    $contentDispositionHeaderValue.FileName = 'image.png'
    $streamContent = New-Object System.Net.Http.StreamContent $ms
    $streamContent.Headers.ContentDisposition = $contentDispositionHeaderValue
    $streamContent.Headers.ContentType = New-Object System.Net.Http.Headers.MediaTypeHeaderValue 'image/png'
    $content = New-Object System.Net.Http.MultipartFormDataContent
    $content.Add($streamContent)
    $response = $httpClient.PostAsync('https://stackoverflow.com/upload/image?https=true', $content).Result
    $response.Content.ReadAsStringAsync().Result -match '"(.*)"' | Out-Null
    if ($args -eq "linkonly"){
        Set-Clipboard $matches[1]   
        }
    else{
        Set-Clipboard "![]($($matches[1]))"
    }
}