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Classic ASP Examples

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(Classic ASP) Stream a file to compression to encryption to an output file.

Runs a chain of streams to read a source file, compress, encrypt, and write an output file.

Chilkat ActiveX Downloads

ActiveX for 32-bit and 64-bit Windows

<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
</head>
<body>
<%
'  This requires the Chilkat API to have been previously unlocked.
'  See Global Unlock Sample for sample code.

'  Initialize the compression object.
set compress = Server.CreateObject("Chilkat_9_5_0.Compression")
compress.Algorithm = "deflate"

'  Initialize the encryption object.
set crypt = Server.CreateObject("Chilkat_9_5_0.Crypt2")
crypt.CryptAlgorithm = "chacha20"
crypt.KeyLength = 256
crypt.EncodingMode = "hex"
ivHex = "000000000000000000000002"
crypt.SetEncodedIV ivHex,"hex"
crypt.InitialCount = 42
keyHex = "1c9240a5eb55d38af333888604f6b5f0473917c1402b80099dca5cbc207075c0"
crypt.SetEncodedKey keyHex,"hex"

'  Setup the streams.
'  streamC is for compression
set streamC = Server.CreateObject("Chilkat_9_5_0.Stream")
'  streamE is for encryption
set streamE = Server.CreateObject("Chilkat_9_5_0.Stream")

'  The source for the compressor is a file.
streamC.SourceFile = "qa_data/hamlet.xml"
'  The source for the encryptor is the output of the compressor stream.
success = streamE.SetSourceStream(streamC)

'  The sink for the encryptor is the output file.
streamE.SinkFile = "qa_output/compressed_encrypted.dat"

'  Start the compression and encryption streams in background threads..
' taskC is a Chilkat_9_5_0.Task
Set taskC = compress.CompressStreamAsync(streamC)
' taskE is a Chilkat_9_5_0.Task
Set taskE = crypt.EncryptStreamAsync(streamE)
success = taskC.Run()
success = taskE.Run()

'  Let the streams run until finished.
'  Let's make sure the background task finished.
'  It should already be the case that the task is finished.
Do While ((taskE.Finished <> 1) Or (taskC.Finished <> 1))
    taskE.SleepMs 20
Loop

'  check for success..
If (taskE.TaskSuccess <> 1) Then
    Response.Write "<pre>" & Server.HTMLEncode( "async encryption failed:") & "</pre>"
    Response.Write "<pre>" & Server.HTMLEncode( taskE.ResultErrorText) & "</pre>"
    success = 0
End If

'  check for success..
If (taskC.TaskSuccess <> 1) Then
    Response.Write "<pre>" & Server.HTMLEncode( "async compression failed:") & "</pre>"
    Response.Write "<pre>" & Server.HTMLEncode( taskC.ResultErrorText) & "</pre>"
    success = 0
End If

'  Load the file that was produced and decrypt/decompress to verify.
set binData = Server.CreateObject("Chilkat_9_5_0.BinData")
success = binData.LoadFile("qa_output/compressed_encrypted.dat")
success = crypt.DecryptBd(binData)
success = compress.DecompressBd(binData)

'  binData should contain the original data..
success = binData.WriteFile("qa_output/original_hamlet.xml")

Response.Write "<pre>" & Server.HTMLEncode( "Finished.") & "</pre>"

%>
</body>
</html>

 

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