(PHP Extension) Streaming Decrypt HTTP Response

If the an encrypted file was previously uploaded, this example demonstrates how to download and decrypt in a streaming way.

Chilkat PHP Downloads PHP Extension for Windows, Linux, MacOS, Alpine Linux, Solaris

<?php

// The version number (9_5_0) should match version of the Chilkat extension used, omitting the micro-version number.
// For example, if using Chilkat v9.5.0.48, then include as shown here:
include("chilkat_9_5_0.php");

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

$rest = new CkRest();

$bTls = true;
$port = 443;
$bAutoReconnect = true;
$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) {
    print $rest->lastErrorText() . "\n";
    exit;
}

// Read the response header.
$responseStatusCode = $rest->ReadResponseHeader();
if ($responseStatusCode < 0) {
    print $rest->lastErrorText() . "\n";
    exit;
}

print 'Response status code = ' . $responseStatusCode . "\n";

// 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) {
    $errResponse = $rest->readRespBodyString();
    if ($rest->get_LastMethodSuccess() != true) {
        print $rest->lastErrorText() . "\n";
    }
    else {
        print $errResponse . "\n";
    }

    exit;
}

// 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..
$crypt = new CkCrypt2();
$crypt->put_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->put_CipherMode('cbc');
$crypt->put_KeyLength(128);
$crypt->SetEncodedKey('000102030405060708090A0B0C0D0E0F','hex');
$crypt->SetEncodedIV('000102030405060708090A0B0C0D0E0F','hex');

$receiveStream = new CkStream();
// The decryptStream's source will be the receiveStream.
$decryptStream = new CkStream();

// The decrypt stream's sink will be a file.
$decryptStream->put_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 is a CkTask
$decryptStreamTask = $crypt->DecryptStreamAsync($decryptStream);
$success = $decryptStreamTask->Run();

$success = $rest->ReadRespBodyStream($receiveStream,true);
if ($success != true) {
    print $rest->lastErrorText() . "\n";
    exit;
}

print 'Successfully received the .zip file.' . "\n";

?>