/**
* Set ETag HTTP Response Header
*
* Set the etag header and stop if the conditional GET request matches.
* The `value` argument is a unique identifier for the current resource.
* The `type` argument indicates whether the etag should be used as a strong or
* weak cache validator.
*
* When the current request includes an 'If-None-Match' header with
* a matching etag, execution is immediately stopped. If the request
* method is GET or HEAD, a '304 Not Modified' response is sent.
*
* @param string $value The etag value
* @param string $type The type of etag to create; either "strong" or "weak"
* @throws InvalidArgumentException If provided type is invalid
* @return void
*/
public function etag( $value, $type = 'strong' ) {
//Ensure type is correct
if ( !in_array($type, array('strong', 'weak')) ) {
throw new InvalidArgumentException('Invalid Slim::etag type. Expected "strong" or "weak".');
}
//Set etag value
$value = '"' . $value . '"';
if ( $type === 'weak' ) $value = 'W/'.$value;
$this->response['ETag'] = $value;
//Check conditional GET
if ( $etagsHeader = $this->request->headers('IF_NONE_MATCH')) {
$etags = preg_split('@\s*,\s*@', $etagsHeader);
if ( in_array($value, $etags) || in_array('*', $etags) ) $this->halt(304);
}
}
/**
* Test accurately removes HTTP_ prefix from input header name
*/
public function testHeaderRemovesHttpPrefix()
{
$env = Slim_Environment::mock(array('X_HTTP_METHOD_OVERRIDE' => 'PUT', 'CONTENT_TYPE' => 'application/json'));
//fwrite(fopen('php://stdout', 'w'), print_r($env, true));
$req = new Slim_Http_Request($env);
$this->assertEquals('PUT', $req->headers('X_HTTP_METHOD_OVERRIDE'));
$this->assertNull($req->headers('X_METHOD_OVERRIDE'));
//<-- Ensures `HTTP_` is not removed if not prefix
$this->assertEquals('application/json', $req->headers('HTTP_CONTENT_TYPE'));
//<-- Ensures `HTTP_` is removed if prefix
}
/**
* Test headers
*/
public function testHeaders()
{
Slim_Environment::mock(array('REQUEST_METHOD' => 'PUT', 'REMOTE_ADDR' => '127.0.0.1', 'SCRIPT_NAME' => '/foo/index.php', 'PATH_INFO' => '/bar/xyz', 'QUERY_STRING' => 'one=1&two=2&three=3', 'SERVER_NAME' => 'slim', 'SERVER_PORT' => 80, 'slim.url_scheme' => 'http', 'slim.input' => '', 'slim.errors' => fopen('php://stderr', 'w'), 'CONTENT_TYPE' => 'application/x-www-form-urlencoded', 'HTTP_ACCEPT_ENCODING' => 'gzip'));
$env = Slim_Environment::getInstance();
$req = new Slim_Http_Request($env);
$headers = $req->headers();
$this->assertTrue(is_array($headers));
$this->assertArrayHasKey('HTTP_ACCEPT_ENCODING', $headers);
$this->assertFalse(isset($headers['CONTENT_TYPE']));
$this->assertEquals('gzip', $req->headers('HTTP_ACCEPT_ENCODING'));
$this->assertEquals('gzip', $req->headers('HTTP-ACCEPT-ENCODING'));
$this->assertEquals('gzip', $req->headers('http_accept_encoding'));
$this->assertEquals('gzip', $req->headers('http-accept-encoding'));
$this->assertEquals('gzip', $req->headers('ACCEPT_ENCODING'));
$this->assertEquals('gzip', $req->headers('ACCEPT-ENCODING'));
$this->assertEquals('gzip', $req->headers('accept_encoding'));
$this->assertEquals('gzip', $req->headers('accept-encoding'));
$this->assertNull($req->headers('foo'));
}
public function testHeaders()
{
//Case A
$_SERVER['X_REQUESTED_WITH'] = 'XMLHttpRequest';
$r = new Slim_Http_Request();
$this->assertEquals('slim', $r->headers('HOST'));
$this->assertEquals('XMLHttpRequest', $r->headers('X_REQUESTED_WITH'));
$this->assertTrue(is_array($r->headers()));
//Case B - HTTP headers may be case insensitive
$_SERVER['x-requested-with'] = 'XMLHttpRequest';
$r = new Slim_Http_Request();
$this->assertEquals('XMLHttpRequest', $r->headers('X_REQUESTED_WITH'));
//Case C - HTTP headers may be case insensitive
$_SERVER['X-Requested-With'] = 'XMLHttpRequest';
$r = new Slim_Http_Request();
$this->assertEquals('XMLHttpRequest', $r->headers('X_REQUESTED_WITH'));
}