(PHP ActiveX) HMRC Validate Fraud Prevention Headers

Demonstrates how to test (validate) HMRC fraud prevention headers.

Chilkat ActiveX Downloads ActiveX for 32-bit and 64-bit Windows Note: The php_com_dotnet.dll may need to be enabled inside of php.ini.

<?php

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

// For versions of Chilkat < 10.0.0, use new COM('Chilkat_9_5_0.Chilkat.Rest')
$rest = new COM("Chilkat.Rest");

$success = $rest->Connect('test-api.service.hmrc.gov.uk',443,1,1);
if ($success == 0) {
    print $rest->LastErrorText . "\n";
    exit;
}

// Load the previously fetched access token.
// For versions of Chilkat < 10.0.0, use new COM('Chilkat_9_5_0.Chilkat.JsonObject')
$json = new COM("Chilkat.JsonObject");
$success = $json->LoadFile('qa_data/tokens/hmrc.json');
$accessToken = $json->stringOf('access_token');
print 'Using access toke: ' . $accessToken . "\n";

// For versions of Chilkat < 10.0.0, use new COM('Chilkat_9_5_0.Chilkat.StringBuilder')
$sbAuthHeaderValue = new COM("Chilkat.StringBuilder");
$sbAuthHeaderValue->Append('Bearer ');
$sbAuthHeaderValue->Append($accessToken);

$rest->AddHeader('Accept','application/vnd.hmrc.1.0+json');
$rest->AddHeader('Authorization',$sbAuthHeaderValue->getAsString());

// Add the fraud prevention headers.
// See https://developer.service.hmrc.gov.uk/api-documentation/docs/fraud-prevention
$rest->AddHeader('gov-client-connection-method','DESKTOP_APP_DIRECT');

// This should be generated by an application and persistently stored on the device. The identifier should not expire.
$rest->AddHeader('gov-client-device-id','beec798b-b366-47fa-b1f8-92cede14a1ce');

// See https://developer.service.hmrc.gov.uk/api-documentation/docs/fraud-prevention
$rest->AddHeader('gov-client-user-ids','os=user123');

// Your local IP addresses (comma separated), such as addresses beginning with "192.168." or "172.16."
$rest->AddHeader('gov-client-local-ips','172.16.16.23');
// You'll need to find a way to get your MAC address.  Chilkat does not yet provide this ability...
$rest->AddHeader('gov-client-mac-addresses','7C%3AD3%3A0A%3A25%3ADA%3A1C');

$rest->AddHeader('gov-client-timezone','UTC+00:00');

// You can probably just hard-code these so they're always the same with each request.
$rest->AddHeader('gov-client-window-size','width=1256&height=800');
$rest->AddHeader('gov-client-screens','width=1920&height=1080&scaling-factor=1&colour-depth=16');
$rest->AddHeader('gov-client-user-agent','Windows/Server%202012 (Dell%20Inc./OptiPlex%20980)');
$rest->AddHeader('gov-vendor-version','My%20Desktop%20Software=1.2.3.build4286');

$responseStr = $rest->fullRequestNoBody('GET','/test/fraud-prevention-headers/validate');
if ($rest->LastMethodSuccess == 0) {
    print $rest->LastErrorText . "\n";
    exit;
}

// If the status code is 200, then the fraud prevention headers were validated.
// The JSON response may include some warnings..
print 'Response status code = ' . $rest->ResponseStatusCode . "\n";
print 'Response JSON body: ' . "\n";
print $responseStr . "\n";

?>