PureBasic

Unzip an AES Encrypted Text File directly into a String Variable

See more Zip Examples

A common need is to unzip from an AES encrypted Zip archive directly into a string variable, such that the unencrypted file never resides on disk, even temporarily. This example shows how to do it. PureBasic

IncludeFile "CkZip.pb"
IncludeFile "CkZipEntry.pb"

Procedure ChilkatExample()

    success.i = 0

    ; This example requires the Chilkat API to have been previously unlocked.
    ; See Global Unlock Sample for sample code.

    zip.i = CkZip::ckCreate()
    If zip.i = 0
        Debug "Failed to create object."
        ProcedureReturn
    EndIf

    ; This example opens a WinZip-compatible AES encrypted
    ; .zip that contains a single file: hamlet.xml.

    ; It decrypts and unzips hamlet.xml directly into a string
    ; variable.
    CkZip::ckSetPassword(zip,"secret")
    success = CkZip::ckOpenZip(zip,"qa_data/hamlet.zip")
    If success = 0
        Debug CkZip::ckLastErrorText(zip)
        CkZip::ckDispose(zip)
        ProcedureReturn
    EndIf

    entry.i = CkZipEntry::ckCreate()
    If entry.i = 0
        Debug "Failed to create object."
        ProcedureReturn
    EndIf

    success = CkZip::ckEntryOf(zip,"hamlet.xml",entry)
    If success = 0
        Debug CkZip::ckLastErrorText(zip)
        CkZip::ckDispose(zip)
        CkZipEntry::ckDispose(entry)
        ProcedureReturn
    EndIf

    ; lineEndingBehavior:
    ; 0 = leave unchanged.
    ; 1 = convert all to bare LF's
    ; 2 = convert all to CRLF's
    lineEndingBehavior.i = 0
    srcCharset.s = "utf-8"
    xmlText.s = CkZipEntry::ckUnzipToString(entry,lineEndingBehavior,srcCharset)
    Debug xmlText


    CkZip::ckDispose(zip)
    CkZipEntry::ckDispose(entry)


    ProcedureReturn
EndProcedure