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(Node.js) Streaming Decrypt HTTP ResponseIf the an encrypted file was previously uploaded, this example demonstrates how to download and decrypt in a streaming way.
var os = require('os'); if (os.platform() == 'win32') { if (os.arch() == 'ia32') { var chilkat = require('@chilkat/ck-node21-win-ia32'); } else { var chilkat = require('@chilkat/ck-node21-win64'); } } else if (os.platform() == 'linux') { if (os.arch() == 'arm') { var chilkat = require('@chilkat/ck-node21-arm'); } else if (os.arch() == 'x86') { var chilkat = require('@chilkat/ck-node21-linux32'); } else { var chilkat = require('@chilkat/ck-node21-linux64'); } } else if (os.platform() == 'darwin') { if (os.arch() == 'arm64') { var chilkat = require('@chilkat/ck-node21-mac-m1'); } else { var chilkat = require('@chilkat/ck-node21-macosx'); } } function chilkatExample() { // This example requires the Chilkat API to have been previously unlocked. // See Global Unlock Sample for sample code. var rest = new chilkat.Rest(); var bTls = true; var port = 443; var bAutoReconnect = true; var success = rest.Connect("chilkatdownload.com",port,bTls,bAutoReconnect); // Send the request to download a file. success = rest.SendReqNoBody("GET","/9.5.0.83/chilkat-9.5.0-python-3.8-x64.zip"); if (success !== true) { console.log(rest.LastErrorText); return; } // Read the response header. var responseStatusCode = rest.ReadResponseHeader(); if (responseStatusCode < 0) { console.log(rest.LastErrorText); return; } console.log("Response status code = " + responseStatusCode); // We expect a 200 response status if the JPG data is coming. // Otherwise, we'll get a string response body with an error message(or no response body). if (responseStatusCode !== 200) { var errResponse = rest.ReadRespBodyString(); if (rest.LastMethodSuccess !== true) { console.log(rest.LastErrorText); } else { console.log(errResponse); } return; } // Create an object for decrypting. // This example will use "none" for the encryption algorithm, which means it's just a pass-through. // Typically you would set the decrypt properties, such as secret key, IV, key length, padding scheme, cipher mode.. var crypt = new chilkat.Crypt2(); crypt.CryptAlgorithm = "none"; // The following settings are ignored in this test because our CryptAlgorithm is "none". // However, if you were truly decrypting, you might set CryptAlgorithm = "aes". crypt.CipherMode = "cbc"; crypt.KeyLength = 128; crypt.SetEncodedKey("000102030405060708090A0B0C0D0E0F","hex"); crypt.SetEncodedIV("000102030405060708090A0B0C0D0E0F","hex"); var receiveStream = new chilkat.Stream(); // The decryptStream's source will be the receiveStream. var decryptStream = new chilkat.Stream(); // The decrypt stream's sink will be a file. decryptStream.SinkFile = "qa_output/chilkat-9.5.0-python-3.8-x64.zip"; decryptStream.SetSourceStream(receiveStream); // Create and run a background async task to decrypt incoming data and write to a file. // decryptStreamTask: Task var decryptStreamTask = crypt.DecryptStreamAsync(decryptStream); success = decryptStreamTask.Run(); success = rest.ReadRespBodyStream(receiveStream,true); if (success !== true) { console.log(rest.LastErrorText); return; } console.log("Successfully received the .zip file."); } chilkatExample(); |
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