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DataFlex Examples

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(DataFlex) Create a Zip Entirely in Memory

Demonstrates how to create a .zip from in-memory byte data and strings, and to write the .zip to an in-memory image.

Chilkat ActiveX Downloads

ActiveX for 32-bit and 64-bit Windows

Use ChilkatAx-9.5.0-win32.pkg

Procedure Test
    Handle hoCrypt
    Handle hoZip
    Boolean iSuccess
    Variant hoBinFileData
    Variant vEntry
    Handle hoEntry
    Variant hoZipFileInMemory
    Handle hoFac
    String sTemp1

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

    Get Create (RefClass(cComChilkatCrypt2)) To hoCrypt
    If (Not(IsComObjectCreated(hoCrypt))) Begin
        Send CreateComObject of hoCrypt
    End
    Get Create (RefClass(cComChilkatZip)) To hoZip
    If (Not(IsComObjectCreated(hoZip))) Begin
        Send CreateComObject of hoZip
    End

    Get ComNewZip Of hoZip "test.zip" To iSuccess
    If (iSuccess <> True) Begin
        Get ComLastErrorText Of hoZip To sTemp1
        Showln sTemp1
        Procedure_Return
    End

    //  Add the bytes 0x00 0x01 0x02 0x03 ... 0x0F as a file in the .zip

    Get ComDecode Of hoCrypt "000102030405060708090A0B0C0D0E0F" "hex" To hoBinFileData
    Get ComAppendData Of hoZip "binaryData.dat" vBinFileData To vEntry
    If (IsComObject(vEntry)) Begin
        Get Create (RefClass(cComChilkatZipEntry)) To hoEntry
        Set pvComObject Of hoEntry To vEntry
    End
    Send Destroy of hoEntry

    //  Add the string "Hello World!" to the .zip
    Get ComAppendString2 Of hoZip "helloWorld.txt" "Hello World!" "utf-8" To vEntry
    If (IsComObject(vEntry)) Begin
        Get Create (RefClass(cComChilkatZipEntry)) To hoEntry
        Set pvComObject Of hoEntry To vEntry
    End
    Send Destroy of hoEntry

    Get ComWriteToMemory Of hoZip To hoZipFileInMemory

    //  We could save these files to a file, and it is a valid .zip
    Get Create (RefClass(cComCkFileAccess)) To hoFac
    If (Not(IsComObjectCreated(hoFac))) Begin
        Send CreateComObject of hoFac
    End
    Get ComWriteEntireFile Of hoFac "test.zip" vZipFileInMemory To iSuccess
    If (iSuccess <> True) Begin
        Get ComLastErrorText Of hoFac To sTemp1
        Showln sTemp1
        Procedure_Return
    End

    Showln "Zip Created!"


End_Procedure

 

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