PowerBuilder

Extract data:image/png;base64 from HTML

See more Base64 Examples

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

integer li_rc
integer li_Success
oleobject loo_Sb
oleobject loo_Bd
oleobject loo_SbFilename
integer li_Index
integer li_MayHaveMore
string ls_SBase64
integer li_Count

li_Success = 0

loo_Sb = create oleobject
li_rc = loo_Sb.ConnectToNewObject("Chilkat.StringBuilder")
if li_rc < 0 then
    destroy loo_Sb
    MessageBox("Error","Connecting to COM object failed")
    return
end if
loo_Bd = create oleobject
li_rc = loo_Bd.ConnectToNewObject("Chilkat.BinData")

loo_SbFilename = create oleobject
li_rc = loo_SbFilename.ConnectToNewObject("Chilkat.StringBuilder")

li_Index = 1

li_Success = loo_Sb.LoadFile("qa_data/html/oresp body.txt","utf-8")
// Assume success.
Write-Debug "length = " + string(loo_Sb.Length)

li_MayHaveMore = 1
do while li_MayHaveMore = 1

    // Get the base64 between the 1st occurrence "data:image/png;base64," and "'"
    ls_SBase64 = loo_Sb.GetBetween("data:image/png;base64,","'")

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

    if loo_Sb.LastMethodSuccess = 1 then
        // Found something.
        // Load into bd and save.
        li_Success = loo_Bd.LoadEncoded(ls_SBase64,"base64")

        loo_SbFilename.SetString("qa_output/png_")
        loo_SbFilename.AppendInt(li_Index)
        loo_SbFilename.Append(".png")

        loo_Bd.WriteFile(loo_SbFilename.GetAsString())

        // Replace "data:image/png;base64" with "data:image-png;base64" so the next iteration finds the next occurrence.
        loo_Sb.ReplaceFirst("data:image/png;base64","data:image-png;base64")
    end if

    li_Index = li_Index + 1
loop

// Restore our replacements..
li_Count = loo_Sb.Replace("data:image-png;base64","data:image/png;base64")

Write-Debug "All done."


destroy loo_Sb
destroy loo_Bd
destroy loo_SbFilename