how to post a http request from command line

Create a .vbs file containing:

' Set your settings
    strFileURL = "http://localhost/index.aspx"
    strHDLocation = "stream.temp"

' Fetch the file
    Set objXMLHTTP = CreateObject("MSXML2.XMLHTTP")

    objXMLHTTP.open "GET", strFileURL, false
    objXMLHTTP.send()

If objXMLHTTP.Status = 200 Then
Set objADOStream = CreateObject("ADODB.Stream")
objADOStream.Open
objADOStream.Type = 1 'adTypeBinary

objADOStream.Write objXMLHTTP.ResponseBody
objADOStream.Position = 0    'Set the stream position to the start

Set objFSO = Createobject("Scripting.FileSystemObject")
If objFSO.Fileexists(strHDLocation) Then objFSO.DeleteFile strHDLocation

objADOStream.SaveToFile strHDLocation
objADOStream.Close
Set objADOStream = Nothing
End if

Set objXMLHTTP = Nothing

' Delete the temp file
objFSO.DeleteFile strHDLocation

Set objFSO = Nothing

Then execute using:

cscript.exe scriptname.vbs

telnet on port 80

For example:

telnet www.your-server.com/pageToTest.aspx 80

then type GET

All of these answers require installing a windows feature or other program. Powershell is installed by default and can be run from the command line

powershell -command "Invoke-WebRequest -Uri %url% -Method POST"