HttpFoundation

Question 1

Why the HttpFoundation?

Answer 1

Adds object orientation for the globals $_GET, $_POST, $_SESSION ……

Question 2

How can you create a Request-Object from the current globals?

Answer 2

$request = Request::createFromGlobals();

equivalent to
~~~

$request = new Request(
$_GET,
$_POST,
[],
$_COOKIE,
$_FILES,
$_SERVER
);
)
~~~

Question 3

What type are the properties of the Request objects?

Answer 3

ParameterBag, e.g.:
FileBag,
InputBag,
HeaderBag

Question 4

Which helper methods does the ParameterBag contain to convert into a specific type?

Answer 4

• getBoolean($value, $default)
• getInt($value, $default)
• getEnum($value, $class, $default)
• getAlpha($value, $default)
  and so on…

Question 5

Which method is used on the Request to check if a session was initialized by a previous Request?

Answer 5

hasPreviousSession()

Question 6

How can you anonymize IP-Adresses?

Answer 6

use Symfony\Component\HttpFoundation\IpUtils;

$anonymousIpv4 = IpUtils::anonymize($ipv4);
$anonymousIpv6 = IpUtils::anonymize($ipv6);

Question 7

How do you check if an IP is a private IP?

Answer 7

$isPrivate = IpUtils::isPrivateIp($ipv4);

Question 8

How can a request be checked with a set of rules?

Answer 8

RequestMatchers, e.g. IpsRequestMatcher, IsJsonRequestMatcher

Question 9

Which parts does the Response-Object contain?

Answer 9

• content
• http-status-code
• http-headers

Question 10

How can the different parts of the response be manipulated?

Answer 10

$response->setContent('Hello World');

$response->headers->set('Content-Type', 'text/plain');

$response->setStatusCode(Response::HTTP_NOT_FOUND);

Question 11

What is the default encoding of symfony responses?

Answer 11

UTF-8

Question 12

What is the “prepare”-method used for in the Request and Response?

Answer 12

to fix any incompatibility with the HTTP specification (e.g. a wrong Content-Type header)

Question 13

How to create a cookie?

Answer 13

Cookie::create()

Question 14

How can values like the expiry-date, the value or the domain be set when creating a cookie?

Answer 14

via withers:
~~~
$cookie = Cookie::create(‘foo’)
->withValue(‘bar’)
->withExpires(strtotime(‘Fri, 20-May-2011 15:25:52 GMT’))
->withDomain(‘.example.com’)
->withSecure(true);
~~~

Question 15

How can a cookie be removed?

Answer 15

$response->headers->clearCookie($name)

Question 16

What are partitioned cookies?

Answer 16

The are helpful for embedded stuff like iframes. E.g. for being locked in with the youtube account when watching a youtube video from another website.

Question 17

How can Responses be streamed to the browser?

Answer 17

using a StreamedResponse containing a generator as callback

Question 18

How can a filedownload be started using a disposition?

Answer 18

$disposition = HeaderUtil::makeDisposition(HeaderUtil::DISPOSITION_ATTACHMENT, 'test.txt');

$response->headers->set('Content-Disposition', $disposition);