VBScript

Extract data:image/png;base64 from HTML

See more Base64 Examples

Demonstrates how to extract base64 image data from HTMl and save to files. VBScript

Dim fso, outFile
Set fso = CreateObject("Scripting.FileSystemObject")
'Create a Unicode (utf-16) output text file.
Set outFile = fso.CreateTextFile("output.txt", True, True)

success = 0

set sb = CreateObject("Chilkat.StringBuilder")
set bd = CreateObject("Chilkat.BinData")
set sbFilename = CreateObject("Chilkat.StringBuilder")
index = 1

success = sb.LoadFile("qa_data/html/oresp body.txt","utf-8")
' Assume success.
outFile.WriteLine("length = " & sb.Length)

mayHaveMore = 1
Do While mayHaveMore = 1

    ' Get the base64 between the 1st occurrence "data:image/png;base64," and "'"
    sBase64 = sb.GetBetween("data:image/png;base64,","'")

    ' If nothing is found, then we'll exit the loop because there are no more.
    mayHaveMore = sb.LastMethodSuccess

    If (sb.LastMethodSuccess = 1) Then
        ' Found something.
        ' Load into bd and save.
        success = bd.LoadEncoded(sBase64,"base64")

        success = sbFilename.SetString("qa_output/png_")
        success = sbFilename.AppendInt(index)
        success = sbFilename.Append(".png")

        success = bd.WriteFile(sbFilename.GetAsString())

        ' Replace "data:image/png;base64" with "data:image-png;base64" so the next iteration finds the next occurrence.
        success = sb.ReplaceFirst("data:image/png;base64","data:image-png;base64")
    End If

    index = index + 1
Loop

' Restore our replacements..
count = sb.Replace("data:image-png;base64","data:image/png;base64")

outFile.WriteLine("All done.")

outFile.Close