IT automation and programming tips

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Editing PDF file by pdftk

2017/12/15 PDF, pdftk

“pdftk” is a command line tool which have a rich functions to edit PDF file. The command line tool can edit pdf files even you do not launch a heavy application. In addition, the command line tool can be used in scripts, batch files. This enables you to edit PDFs ...

Automate GUI Control [PowerShell]

2017/12/14 GUI, PowerShell

PowerShell script can simulate keyboard stroke. This behavior can automate applications which do not support command line. At this time, I made a script which run Notepad, input text and save it as a file. Code

#Press Windows key
[System.Windows.Forms.SendKeys]::SendWait("^{ESC}")

#Input "run"
[System.Windows.Forms.SendKeys]::SendWait("run")
Start-Sleep -s 1

#Press Enter key
[System.Windows.Forms.SendKeys]::SendWait("{ENTER}")
Start-Sleep -s 1

#Input "notepad"
[System.Windows.Forms.SendKeys]::SendWait("notepad")

[System.Windows.Forms.SendKeys]::SendWait("{ENTER}")
Start-Sleep -s 1
#Input "This is a test script"
[System.Windows.Forms.SendKeys]::SendWait("This is a test script.")

#Press Control+S key
[System.Windows.Forms.SendKeys]::SendWait("^s")
Start-Sleep -s 1
[System.Windows.Forms.SendKeys]::SendWait("newtext.txt")
[System.Windows.Forms.SendKeys]::SendWait("{ENTER}")
Start-Sleep -s 1

#Press Alt+F4 key
[System.Windows.Forms.SendKeys]::SendWait("%{F4}")

#Press Windows key

[System.Windows.Forms.SendKeys]::SendWait("^{ESC}")

#Input "run"

[System.Windows.Forms.SendKeys]::SendWait("run")

Start-Sleep -s 1

#Press Enter key

[System.Windows.Forms.SendKeys]::SendWait("{ENTER}")

Start-Sleep -s 1

#Input "notepad"

[System.Windows.Forms.SendKeys]::SendWait("notepad")

[System.Windows.Forms.SendKeys]::SendWait("{ENTER}")

Start-Sleep -s 1

#Input "This is a test script"

[System.Windows.Forms.SendKeys]::SendWait("This is a test script.")

#Press Control+S key

[System.Windows.Forms.SendKeys]::SendWait("^s")

Start-Sleep -s 1

[System.Windows.Forms.SendKeys]::SendWait("newtext.txt")

[System.Windows.Forms.SendKeys]::SendWait("{ENTER}")

Start-Sleep -s 1

#Press Alt+F4 key

[System.Windows.Forms.SendKeys]::SendWait("%{F4}")

Explanation This script just press keys by SendKeys. The following page is the ...

Windows

Make an image downloader [PowerShell]

2017/12/14 PowerShell

PowerShell - a tool bundled on Windows has rich functions to extract elements in HTML pages easily. I made a script to download images in a HTML page. Code

Param( $url )

#Get the web page from the URL in the argument
$page = Invoke-WebRequest $url

#Download images
foreach($linkElement in $page.Links.href) {

    # Set the file name as the last string of the path
    $fileName = Split-Path $linkElement -Leaf

    # Get extension from the file name
    $extension = [IO.Path]::GetExtension($filename)

    # In case of the extension is ".jpg" or ".png"
    if ( $extension -eq ".jpg" -or $extension -eq ".png") {

        # Get the file of the link and save it
        Invoke-WebRequest $linkElement -OutFile $fileName
    }
}

Param( $url )

#Get the web page from the URL in the argument

$page = Invoke-WebRequest $url

#Download images

foreach($linkElement in $page.Links.href) {

# Set the file name as the last string of the path

$fileName = Split-Path $linkElement -Leaf

# Get extension from the file name

$extension = [IO.Path]::GetExtension($filename)

# In case of the extension is ".jpg" or ".png"

if ( $extension -eq ".jpg" -or $extension -eq ".png") {

# Get the file of the link and save it

Invoke-WebRequest $linkElement -OutFile $fileName

}

Get arguments on PowerShell script In order to get arguments on PowerShell, "Param(arg1, arg2, ...)" is used. At this time, ...