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(Go) 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.
// This requires the Chilkat API to have been previously unlocked. // See Global Unlock Sample for sample code. var success bool // Initialize the compression object. compress := chilkat.NewCompression() compress.SetAlgorithm("deflate") // Initialize the encryption object. crypt := chilkat.NewCrypt2() crypt.SetCryptAlgorithm("chacha20") crypt.SetKeyLength(256) crypt.SetEncodingMode("hex") ivHex := "000000000000000000000002" crypt.SetEncodedIV(ivHex,"hex") crypt.SetInitialCount(42) keyHex := "1c9240a5eb55d38af333888604f6b5f0473917c1402b80099dca5cbc207075c0" crypt.SetEncodedKey(keyHex,"hex") // Setup the streams. // streamC is for compression streamC := chilkat.NewStream() // streamE is for encryption streamE := chilkat.NewStream() // The source for the compressor is a file. streamC.SetSourceFile("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.SetSinkFile("qa_output/compressed_encrypted.dat") // Start the compression and encryption streams in background threads.. c := make(chan *chilkat.Task) go compress.CompressStreamAsync(streamC,c) taskC := <-c c := make(chan *chilkat.Task) go crypt.EncryptStreamAsync(streamE,c) taskE := <-c // 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. for ((taskE.Finished() != true) || (taskC.Finished() != true)) { taskE.SleepMs(20) } // check for success.. if taskE.TaskSuccess() != true { fmt.Println("async encryption failed:") fmt.Println(taskE.ResultErrorText()) success = false } // check for success.. if taskC.TaskSuccess() != true { fmt.Println("async compression failed:") fmt.Println(taskC.ResultErrorText()) success = false } taskE.DisposeTask() taskC.DisposeTask() // Load the file that was produced and decrypt/decompress to verify. binData := chilkat.NewBinData() 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") fmt.Println("Finished.") compress.DisposeCompression() crypt.DisposeCrypt2() streamC.DisposeStream() streamE.DisposeStream() taskC.DisposeTask() taskE.DisposeTask() binData.DisposeBinData() |
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