StreamedResponse

class StreamedResponse extends Response

StreamedResponse represents a streamed HTTP response.

A StreamedResponse uses a callback for its content.

The callback should use the standard PHP functions like echo to stream the response back to the client. The flush() method can also be used if needed.

Constants

`HTTP_CONTINUE = 100;`
`HTTP_SWITCHING_PROTOCOLS = 101;`
`HTTP_PROCESSING = 102; // RFC2518`
`HTTP_OK = 200;`
`HTTP_CREATED = 201;`
`HTTP_ACCEPTED = 202;`
`HTTP_NON_AUTHORITATIVE_INFORMATION = 203;`
`HTTP_NO_CONTENT = 204;`
`HTTP_RESET_CONTENT = 205;`
`HTTP_PARTIAL_CONTENT = 206;`
`HTTP_MULTI_STATUS = 207; // RFC4918`
`HTTP_ALREADY_REPORTED = 208; // RFC5842`
`HTTP_IM_USED = 226; // RFC3229`
`HTTP_MULTIPLE_CHOICES = 300;`
`HTTP_MOVED_PERMANENTLY = 301;`
`HTTP_FOUND = 302;`
`HTTP_SEE_OTHER = 303;`
`HTTP_NOT_MODIFIED = 304;`
`HTTP_USE_PROXY = 305;`
`HTTP_RESERVED = 306;`
`HTTP_TEMPORARY_REDIRECT = 307;`
`HTTP_PERMANENTLY_REDIRECT = 308; // RFC7238`
`HTTP_BAD_REQUEST = 400;`
`HTTP_UNAUTHORIZED = 401;`
`HTTP_PAYMENT_REQUIRED = 402;`
`HTTP_FORBIDDEN = 403;`
`HTTP_NOT_FOUND = 404;`
`HTTP_METHOD_NOT_ALLOWED = 405;`
`HTTP_NOT_ACCEPTABLE = 406;`
`HTTP_PROXY_AUTHENTICATION_REQUIRED = 407;`
`HTTP_REQUEST_TIMEOUT = 408;`
`HTTP_CONFLICT = 409;`
`HTTP_GONE = 410;`
`HTTP_LENGTH_REQUIRED = 411;`
`HTTP_PRECONDITION_FAILED = 412;`
`HTTP_REQUEST_ENTITY_TOO_LARGE = 413;`
`HTTP_REQUEST_URI_TOO_LONG = 414;`
`HTTP_UNSUPPORTED_MEDIA_TYPE = 415;`
`HTTP_REQUESTED_RANGE_NOT_SATISFIABLE = 416;`
`HTTP_EXPECTATION_FAILED = 417;`
`HTTP_I_AM_A_TEAPOT = 418; // RFC2324`
`HTTP_MISDIRECTED_REQUEST = 421; // RFC7540`
`HTTP_UNPROCESSABLE_ENTITY = 422; // RFC4918`
`HTTP_LOCKED = 423; // RFC4918`
`HTTP_FAILED_DEPENDENCY = 424; // RFC4918`
`HTTP_RESERVED_FOR_WEBDAV_ADVANCED_COLLECTIONS_EXPIRED_PROPOSAL = 425; // RFC2817`
`HTTP_UPGRADE_REQUIRED = 426; // RFC2817`
`HTTP_PRECONDITION_REQUIRED = 428; // RFC6585`
`HTTP_TOO_MANY_REQUESTS = 429; // RFC6585`
`HTTP_REQUEST_HEADER_FIELDS_TOO_LARGE = 431; // RFC6585`
`HTTP_UNAVAILABLE_FOR_LEGAL_REASONS = 451;`
`HTTP_INTERNAL_SERVER_ERROR = 500;`
`HTTP_NOT_IMPLEMENTED = 501;`
`HTTP_BAD_GATEWAY = 502;`
`HTTP_SERVICE_UNAVAILABLE = 503;`
`HTTP_GATEWAY_TIMEOUT = 504;`
`HTTP_VERSION_NOT_SUPPORTED = 505;`
`HTTP_VARIANT_ALSO_NEGOTIATES_EXPERIMENTAL = 506; // RFC2295`
`HTTP_INSUFFICIENT_STORAGE = 507; // RFC4918`
`HTTP_LOOP_DETECTED = 508; // RFC5842`
`HTTP_NOT_EXTENDED = 510; // RFC2774`
`HTTP_NETWORK_AUTHENTICATION_REQUIRED = 511; // RFC6585`

Properties

`ResponseHeaderBag`	`$headers`		from Response
`protected string`	`$content`		from Response
`protected string`	`$version`		from Response
`protected int`	`$statusCode`		from Response
`protected string`	`$statusText`		from Response
`protected string`	`$charset`		from Response
`static array`	`$statusTexts`	Status codes translation table.	from Response
`protected`	`$callback`
`protected`	`$streamed`

Methods

`public`		`__construct(callable $callback = null, $status = 200, array $headers = array())`	No description
`public static`	`Response`	`create(callable\|null $callback = null, int $status = 200, array $headers = array())`	Factory method for chainability.
`public`	`string`	`__toString()`	Returns the Response as an HTTP string.	from Response
`public`		`__clone()`	Clones the current Response instance.	from Response
`public`	`$this`	`prepare(Request $request)`	Prepares the Response before it is sent to the client.	from Response
`public`	`$this`	`sendHeaders()`	Sends HTTP headers.
`public`	`$this`	`sendContent()`	Sends content for the current web response.
`public`	`$this`	`send()`	Sends HTTP headers and content.	from Response
`public`	`$this`	`setContent(mixed $content)`	Sets the response content.
`public`	`string`	`getContent()`	Gets the current response content.
`public`	`$this`	`setProtocolVersion($version)`	Sets the HTTP protocol version (1.0 or 1.1).	from Response
`public`		`getProtocolVersion()`	Gets the HTTP protocol version.	from Response
`public`	`$this`	`setStatusCode($code, $text = null)`	Sets the response status code.	from Response
`public`		`getStatusCode()`	Retrieves the status code for the current web response.	from Response
`public`	`$this`	`setCharset($charset)`	Sets the response charset.	from Response
`public`		`getCharset()`	Retrieves the response charset.	from Response
`public`		`isCacheable()`	Returns true if the response may safely be kept in a shared (surrogate) cache.	from Response
`public`		`isFresh()`	Returns true if the response is "fresh".	from Response
`public`		`isValidateable()`	Returns true if the response includes headers that can be used to validate the response with the origin server using a conditional GET request.	from Response
`public`	`$this`	`setPrivate()`	Marks the response as "private".	from Response
`public`	`$this`	`setPublic()`	Marks the response as "public".	from Response
`public`	`$this`	`setImmutable($immutable = true)`	Marks the response as "immutable".	from Response
`public`		`isImmutable()`	Returns true if the response is marked as "immutable".	from Response
`public`		`mustRevalidate()`	Returns true if the response must be revalidated by caches.	from Response
`public`		`getDate()`	Returns the Date header as a DateTime instance.	from Response
`public`	`$this`	`setDate(DateTimeInterface $date)`	Sets the Date header.	from Response
`public`		`getAge()`	Returns the age of the response in seconds.	from Response
`public`	`$this`	`expire()`	Marks the response stale by setting the Age header to be equal to the maximum age of the response.	from Response
`public`		`getExpires()`	Returns the value of the Expires header as a DateTime instance.	from Response
`public`	`$this`	`setExpires(DateTimeInterface $date = null)`	Sets the Expires HTTP header with a DateTime instance.	from Response
`public`		`getMaxAge()`	Returns the number of seconds after the time specified in the response's Date header when the response should no longer be considered fresh.	from Response
`public`	`$this`	`setMaxAge($value)`	Sets the number of seconds after which the response should no longer be considered fresh.	from Response
`public`	`$this`	`setSharedMaxAge($value)`	Sets the number of seconds after which the response should no longer be considered fresh by shared caches.	from Response
`public`		`getTtl()`	Returns the response's time-to-live in seconds.	from Response
`public`	`$this`	`setTtl($seconds)`	Sets the response's time-to-live for shared caches in seconds.	from Response
`public`	`$this`	`setClientTtl($seconds)`	Sets the response's time-to-live for private/client caches in seconds.	from Response
`public`		`getLastModified()`	Returns the Last-Modified HTTP header as a DateTime instance.	from Response
`public`	`$this`	`setLastModified(DateTimeInterface $date = null)`	Sets the Last-Modified HTTP header with a DateTime instance.	from Response
`public`		`getEtag()`	Returns the literal value of the ETag HTTP header.	from Response
`public`	`$this`	`setEtag(string\|null $etag = null, bool $weak = false)`	Sets the ETag value.	from Response
`public`	`$this`	`setCache($options)`	Sets the response's cache headers (validation and/or expiration).	from Response
`public`	`$this`	`setNotModified()`	Modifies the response so that it conforms to the rules defined for a 304 status code.	from Response
`public`		`hasVary()`	Returns true if the response includes a Vary header.	from Response
`public`		`getVary()`	Returns an array of header names given in the Vary header.	from Response
`public`	`$this`	`setVary(string\|array $headers, bool $replace = true)`	Sets the Vary header.	from Response
`public`	`bool`	`isNotModified(Request $request)`	Determines if the Response validators (ETag, Last-Modified) match a conditional value specified in the Request.	from Response
`public`		`isInvalid()`	Is response invalid?	from Response
`public`		`isInformational()`	Is response informative?	from Response
`public`		`isSuccessful()`	Is response successful?	from Response
`public`		`isRedirection()`	Is the response a redirect?	from Response
`public`		`isClientError()`	Is there a client error?	from Response
`public`		`isServerError()`	Was there a server side error?	from Response
`public`		`isOk()`	Is the response OK?	from Response
`public`		`isForbidden()`	Is the response forbidden?	from Response
`public`		`isNotFound()`	Is the response a not found error?	from Response
`public`		`isRedirect($location = null)`	Is the response a redirect of some form?	from Response
`public`		`isEmpty()`	Is the response empty?	from Response
`public static`		`closeOutputBuffers($targetLevel, $flush)`	Cleans or flushes output buffers up to target level.	from Response
`protected`		`ensureIEOverSSLCompatibility(Request $request)`	Checks if we need to remove Cache-Control for SSL encrypted downloads when using IE < 9.	from Response
`public`	`$this`	`setCallback(callable $callback)`	Sets the PHP callback associated with this Response.

Details

at line 38

`__construct()`

public __construct(callable $callback = null, $status = 200, array $headers = array())

Parameters

`callable`	`$callback`	A valid PHP callback or null to set it later
	`$status`
`array`	`$headers`

at line 58

`create()`

public static Response create(callable|null $callback = null, int $status = 200, array $headers = array())

Factory method for chainability.

Parameters

`callable\|null`	`$callback`	A valid PHP callback or null to set it later
`int`	`$status`	The response status code
`array`	`$headers`	An array of response headers

Return Value

Response

in Response at line 231

`__toString()`

public string __toString()

Returns the Response as an HTTP string.

The string representation of the Response is the same as the one that will be sent to the client only if the prepare() method has been called before.

Return Value

string The Response as an HTTP string

`__clone()`

public __clone()

Clones the current Response instance.

in Response at line 256

`prepare()`

public $this prepare(Request $request)

Prepares the Response before it is sent to the client.

This method tweaks the Response to ensure that it is compliant with RFC 2616. Most of the changes are based on the Request that is "associated" with this Response.

Parameters

Request $request

Return Value

$this

at line 84

`sendHeaders()`

public $this sendHeaders()

Sends HTTP headers.

Return Value

$this

at line 102

`sendContent()`

public $this sendContent()

Sends content for the current web response.

Return Value

$this

in Response at line 364

`send()`

public $this send()

Sends HTTP headers and content.

Return Value

$this

at line 126

`setContent()`

public $this setContent(mixed $content)

Sets the response content.

Valid types are strings, numbers, null, and objects that implement a __toString() method.

Parameters

mixed $content Content that can be cast to string

Return Value

$this

Exceptions

UnexpectedValueException

at line 140

`getContent()`

public string getContent()

Gets the current response content.

Return Value

string Content

in Response at line 417

`setProtocolVersion()`

public $this setProtocolVersion($version)

Sets the HTTP protocol version (1.0 or 1.1).

Parameters

$version

Return Value

$this

in Response at line 429

`getProtocolVersion()`

public getProtocolVersion()

Gets the HTTP protocol version.

in Response at line 446

`setStatusCode()`

public $this setStatusCode($code, $text = null)

Sets the response status code.

If the status text is null it will be automatically populated for the known status codes and left empty otherwise.

Parameters

	`$code`
	`$text`

Return Value

$this

Exceptions

InvalidArgumentException

When the HTTP status code is not valid

in Response at line 475

`getStatusCode()`

public getStatusCode()

Retrieves the status code for the current web response.

in Response at line 487

`setCharset()`

public $this setCharset($charset)

Sets the response charset.

Parameters

$charset

Return Value

$this

in Response at line 499

`getCharset()`

public getCharset()

Retrieves the response charset.

in Response at line 521

`isCacheable()`

public isCacheable()

Returns true if the response may safely be kept in a shared (surrogate) cache.

Responses marked "private" with an explicit Cache-Control directive are considered uncacheable.

Responses with neither a freshness lifetime (Expires, max-age) nor cache validator (Last-Modified, ETag) are considered uncacheable because there is no way to tell when or how to remove them from the cache.

Note that RFC 7231 and RFC 7234 possibly allow for a more permissive implementation, for example "status codes that are defined as cacheable by default [...] can be reused by a cache with heuristic expiration unless otherwise indicated" (https://tools.ietf.org/html/rfc7231#section-6.1)

in Response at line 543

`isFresh()`

public isFresh()

Returns true if the response is "fresh".

Fresh responses may be served from cache without any interaction with the origin. A response is considered fresh when it includes a Cache-Control/max-age indicator or Expires header and the calculated age is less than the freshness lifetime.

in Response at line 554

`isValidateable()`

public isValidateable()

Returns true if the response includes headers that can be used to validate the response with the origin server using a conditional GET request.

in Response at line 568

`setPrivate()`

public $this setPrivate()

Marks the response as "private".

It makes the response ineligible for serving other clients.

Return Value

$this

in Response at line 585

`setPublic()`

public $this setPublic()

Marks the response as "public".

It makes the response eligible for serving other clients.

Return Value

$this

in Response at line 600

`setImmutable()`

public $this setImmutable($immutable = true)

Marks the response as "immutable".

Parameters

$immutable

Return Value

$this

in Response at line 616

`isImmutable()`

public isImmutable()

Returns true if the response is marked as "immutable".

in Response at line 631

`mustRevalidate()`

public mustRevalidate()

Returns true if the response must be revalidated by caches.

This method indicates that the response must not be served stale by a cache in any circumstance without first revalidating with the origin. When present, the TTL of the response should not be overridden to be greater than the value provided by the origin.

in Response at line 643

`getDate()`

public getDate()

Returns the Date header as a DateTime instance.

Exceptions

RuntimeException

When the header is not parseable

in Response at line 655

`setDate()`

public $this setDate(DateTimeInterface $date)

Sets the Date header.

Parameters

DateTimeInterface $date

Return Value

$this

in Response at line 672

`getAge()`

public getAge()

Returns the age of the response in seconds.

in Response at line 686

`expire()`

public $this expire()

Marks the response stale by setting the Age header to be equal to the maximum age of the response.

Return Value

$this

in Response at line 700

`getExpires()`

public getExpires()

Returns the value of the Expires header as a DateTime instance.

in Response at line 719

`setExpires()`

public $this setExpires(DateTimeInterface $date = null)

Sets the Expires HTTP header with a DateTime instance.

Passing null as value will remove the header.

Parameters

DateTimeInterface $date

Return Value

$this

in Response at line 746

`getMaxAge()`

public getMaxAge()

Returns the number of seconds after the time specified in the response's Date header when the response should no longer be considered fresh.

First, it checks for a s-maxage directive, then a max-age directive, and then it falls back on an expires header. It returns null when no maximum age can be established.

in Response at line 772

`setMaxAge()`

public $this setMaxAge($value)

Sets the number of seconds after which the response should no longer be considered fresh.

This methods sets the Cache-Control max-age directive.

Parameters

$value

Return Value

$this

in Response at line 788

`setSharedMaxAge()`

public $this setSharedMaxAge($value)

Sets the number of seconds after which the response should no longer be considered fresh by shared caches.

This methods sets the Cache-Control s-maxage directive.

Parameters

$value

Return Value

$this

in Response at line 806

`getTtl()`

public getTtl()

Returns the response's time-to-live in seconds.

It returns null when no freshness information is present in the response.

When the responses TTL is <= 0, the response may not be served from cache without first revalidating with the origin.

in Response at line 822

`setTtl()`

public $this setTtl($seconds)

Sets the response's time-to-live for shared caches in seconds.

This method adjusts the Cache-Control/s-maxage directive.

Parameters

$seconds

Return Value

$this

in Response at line 838

`setClientTtl()`

public $this setClientTtl($seconds)

Sets the response's time-to-live for private/client caches in seconds.

This method adjusts the Cache-Control/max-age directive.

Parameters

$seconds

Return Value

$this

in Response at line 852

`getLastModified()`

public getLastModified()

Returns the Last-Modified HTTP header as a DateTime instance.

Exceptions

RuntimeException

When the HTTP header is not parseable

in Response at line 866

`setLastModified()`

public $this setLastModified(DateTimeInterface $date = null)

Sets the Last-Modified HTTP header with a DateTime instance.

Passing null as value will remove the header.

Parameters

DateTimeInterface $date

Return Value

$this

in Response at line 889

`getEtag()`

public getEtag()

Returns the literal value of the ETag HTTP header.

in Response at line 904

`setEtag()`

public $this setEtag(string|null $etag = null, bool $weak = false)

Sets the ETag value.

Parameters

`string\|null`	`$etag`	The ETag unique identifier or null to remove the header
`bool`	`$weak`	Whether you want a weak ETag or not

Return Value

$this

in Response at line 930

`setCache()`

public $this setCache($options)

Sets the response's cache headers (validation and/or expiration).

Available options are: etag, last_modified, max_age, s_maxage, private, public and immutable.

Parameters

$options

Return Value

$this

Exceptions

InvalidArgumentException

in Response at line 987

`setNotModified()`

public $this setNotModified()

Modifies the response so that it conforms to the rules defined for a 304 status code.

This sets the status, removes the body, and discards any headers that MUST NOT be included in 304 responses.

Return Value

$this

`hasVary()`

public hasVary()

Returns true if the response includes a Vary header.

in Response at line 1015

`getVary()`

public getVary()

Returns an array of header names given in the Vary header.

in Response at line 1039

`setVary()`

public $this setVary(string|array $headers, bool $replace = true)

Sets the Vary header.

Parameters

`string\|array`	`$headers`
`bool`	`$replace`	Whether to replace the actual value or not (true by default)

Return Value

$this

in Response at line 1057

`isNotModified()`

public bool isNotModified(Request $request)

Determines if the Response validators (ETag, Last-Modified) match a conditional value specified in the Request.

If the Response is not modified, it sets the status code to 304 and removes the actual content by calling the setNotModified() method.

Parameters

Request $request

Return Value

bool true if the Response validators match the Request, false otherwise

in Response at line 1089

`isInvalid()`

public isInvalid()

Is response invalid?

`isInformational()`

public isInformational()

Is response informative?

in Response at line 1109

`isSuccessful()`

public isSuccessful()

Is response successful?

in Response at line 1119

`isRedirection()`

public isRedirection()

Is the response a redirect?

in Response at line 1129

`isClientError()`

public isClientError()

Is there a client error?

in Response at line 1139

`isServerError()`

public isServerError()

Was there a server side error?

in Response at line 1149

`isOk()`

public isOk()

Is the response OK?

in Response at line 1159

`isForbidden()`

public isForbidden()

Is the response forbidden?

in Response at line 1169

`isNotFound()`

public isNotFound()

Is the response a not found error?

in Response at line 1179

`isRedirect()`

public isRedirect($location = null)

Is the response a redirect of some form?

Parameters

$location

in Response at line 1189

`isEmpty()`

public isEmpty()

Is the response empty?

in Response at line 1201

`closeOutputBuffers()`

public static closeOutputBuffers($targetLevel, $flush)

Cleans or flushes output buffers up to target level.

Resulting level can be greater than target level if a non-removable buffer has been encountered.

Parameters

	`$targetLevel`
	`$flush`

in Response at line 1223

`ensureIEOverSSLCompatibility()`

protected ensureIEOverSSLCompatibility(Request $request)

Checks if we need to remove Cache-Control for SSL encrypted downloads when using IE < 9.

Parameters

Request $request

`setCallback()`

public $this setCallback(callable $callback)

Sets the PHP callback associated with this Response.

Parameters

callable $callback A valid PHP callback

Return Value

$this

Source code

<?php

/*
 * This file is part of the Symfony package.
 *
 * (c) Fabien Potencier <fabien@symfony.com>
 *
 * For the full copyright and license information, please view the LICENSE
 * file that was distributed with this source code.
 */

namespace App\Khan\Component\HttpFoundation;

/**
 * StreamedResponse represents a streamed HTTP response.
 *
 * A StreamedResponse uses a callback for its content.
 *
 * The callback should use the standard PHP functions like echo
 * to stream the response back to the client. The flush() method
 * can also be used if needed.
 *
 * @see flush()
 *
 * @author Fabien Potencier <fabien@symfony.com>
 */
class StreamedResponse extends Response
{
    protected $callback;
    protected $streamed;
    private $headersSent;

    /**
     * @param callable|null $callback A valid PHP callback or null to set it later
     * @param int           $status   The response status code
     * @param array         $headers  An array of response headers
     */
    public function __construct(callable $callback = null, int $status = 200, array $headers = array())
    {
        parent::__construct(null, $status, $headers);

        if (null !== $callback) {
            $this->setCallback($callback);
        }
        $this->streamed = false;
        $this->headersSent = false;
    }

    /**
     * Factory method for chainability.
     *
     * @param callable|null $callback A valid PHP callback or null to set it later
     * @param int           $status   The response status code
     * @param array         $headers  An array of response headers
     *
     * @return static
     */
    public static function create($callback = null, $status = 200, $headers = array())
    {
        return new static($callback, $status, $headers);
    }

    /**
     * Sets the PHP callback associated with this Response.
     *
     * @param callable $callback A valid PHP callback
     *
     * @return $this
     */
    public function setCallback(callable $callback)
    {
        $this->callback = $callback;

        return $this;
    }

    /**
     * {@inheritdoc}
     *
     * This method only sends the headers once.
     *
     * @return $this
     */
    public function sendHeaders()
    {
        if ($this->headersSent) {
            return $this;
        }

        $this->headersSent = true;

        return parent::sendHeaders();
    }

    /**
     * {@inheritdoc}
     *
     * This method only sends the content once.
     *
     * @return $this
     */
    public function sendContent()
    {
        if ($this->streamed) {
            return $this;
        }

        $this->streamed = true;

        if (null === $this->callback) {
            throw new \LogicException('The Response callback must not be null.');
        }

        call_user_func($this->callback);

        return $this;
    }

    /**
     * {@inheritdoc}
     *
     * @throws \LogicException when the content is not null
     *
     * @return $this
     */
    public function setContent($content)
    {
        if (null !== $content) {
            throw new \LogicException('The content cannot be set on a StreamedResponse instance.');
        }

        return $this;
    }

    /**
     * {@inheritdoc}
     *
     * @return false
     */
    public function getContent()
    {
        return false;
    }
}

StreamedResponse

Constants

Properties

Methods

Details

__construct()

Parameters

create()

Parameters

Return Value

__toString()

Return Value

See also

__clone()

prepare()

Parameters

Return Value

sendHeaders()

Return Value

sendContent()

Return Value

send()

Return Value

setContent()

Parameters

Return Value

Exceptions

getContent()

Return Value

setProtocolVersion()

Parameters

Return Value

getProtocolVersion()

setStatusCode()

Parameters

Return Value

Exceptions

getStatusCode()

setCharset()

Parameters

Return Value

getCharset()

isCacheable()

isFresh()

isValidateable()

setPrivate()

Return Value

setPublic()

Return Value

setImmutable()

Parameters

Return Value

isImmutable()

mustRevalidate()

getDate()

Exceptions

setDate()

Parameters

Return Value

getAge()

expire()

Return Value

getExpires()

setExpires()

Parameters

Return Value

getMaxAge()

setMaxAge()

Parameters

Return Value

setSharedMaxAge()

Parameters

Return Value

getTtl()

setTtl()

Parameters

Return Value

setClientTtl()

Parameters

Return Value

`__construct()`

`create()`

`__toString()`

`__clone()`

`prepare()`

`sendHeaders()`

`sendContent()`

`send()`

`setContent()`

`getContent()`

`setProtocolVersion()`

`getProtocolVersion()`

`setStatusCode()`

`getStatusCode()`

`setCharset()`

`getCharset()`

`isCacheable()`

`isFresh()`

`isValidateable()`

`setPrivate()`

`setPublic()`

`setImmutable()`

`isImmutable()`

`mustRevalidate()`

`getDate()`

`setDate()`

`getAge()`

`expire()`

`getExpires()`

`setExpires()`

`getMaxAge()`

`setMaxAge()`

`setSharedMaxAge()`

`getTtl()`

`setTtl()`

`setClientTtl()`

`getLastModified()`

`setLastModified()`

`getEtag()`

`setEtag()`

`setCache()`

`setNotModified()`

`hasVary()`

`getVary()`

`setVary()`

`isNotModified()`

`isInvalid()`

`isInformational()`

`isSuccessful()`

`isRedirection()`

`isClientError()`

`isServerError()`

`isOk()`

`isForbidden()`

`isNotFound()`

`isRedirect()`

`isEmpty()`

`closeOutputBuffers()`

`ensureIEOverSSLCompatibility()`

`setCallback()`