Wikimedia\Http\HttpAcceptNegotiator Class Reference

Utility for negotiating a value from a set of supported values using a preference list. More...

Public Member Functions
	__construct (array $supported)
	getBestSupportedKey (array $weights, $default=null)
	Returns the best supported key from the given weight map.
	getFirstSupportedValue (array $preferences, $default=null)
	Returns the first supported value from the given preference list.

Private Member Functions
	valueMatches ( $accepted, $supported)
	Returns true if the given acceptable value matches the given supported value, according to the HTTP specification.

Private Attributes
string	$defaultValue
string[]	$supportedValues

Detailed Description

Utility for negotiating a value from a set of supported values using a preference list.

This is intended for use with HTTP headers like Accept, Accept-Language, Accept-Encoding, etc. See RFC 2616 section 14 for details.

To use this with a request header, first parse the header value into an array of weights using HttpAcceptParser, then call getBestSupportedKey.

Note

GPL-2.0-or-later

Author

Daniel Kinzler

Thiemo Kreuz

Definition at line 17 of file HttpAcceptNegotiator.php.

Constructor & Destructor Documentation

__construct()

Wikimedia\Http\HttpAcceptNegotiator::__construct

(

array

$supported

)

Parameters

string[]

$supported

A list of supported values.

Definition at line 32 of file HttpAcceptNegotiator.php.

Member Function Documentation

getBestSupportedKey()

Wikimedia\Http\HttpAcceptNegotiator::getBestSupportedKey	(	array	$weights,
			$default = null
	)

Returns the best supported key from the given weight map.

Of the keys from the $weights parameter that are also in the list of supported values supplied to the constructor, this returns the key that has the highest weight associated with it. If two keys have the same weight, the more specific key is preferred, as required by RFC2616 section 14. Keys that map to 0 or false are ignored. If no matching key is found, $default is returned.

Parameters

float[]	$weights	An associative array mapping accepted values to their respective weights.
null | string	$default	The value to return if non of the keys in $weights is supported (null per default).

Returns

null|string The best supported key from the $weights parameter.

Definition at line 53 of file HttpAcceptNegotiator.php.

References Wikimedia\Http\HttpAcceptNegotiator\getFirstSupportedValue().

getFirstSupportedValue()

Wikimedia\Http\HttpAcceptNegotiator::getFirstSupportedValue	(	array	$preferences,
			$default = null
	)

Returns the first supported value from the given preference list.

Of the values from the $preferences parameter that are also in the list of supported values supplied to the constructor, this returns the value that has the lowest index in the list. If no such value is found, $default is returned.

Parameters

string[]	$preferences	A list of acceptable values, in order of preference.
null | string	$default	The value to return if non of the keys in $weights is supported (null per default).

Returns

null|string The best supported key from the $weights parameter.

Definition at line 89 of file HttpAcceptNegotiator.php.

References Wikimedia\Http\HttpAcceptNegotiator\valueMatches().

Referenced by Wikimedia\Http\HttpAcceptNegotiator\getBestSupportedKey().

valueMatches()

Wikimedia\Http\HttpAcceptNegotiator::valueMatches (   $accepted,   $supported  )

private

Returns true if the given acceptable value matches the given supported value, according to the HTTP specification.

The following rules are used:

• comparison is case-insensitive
• if $accepted and $supported are equal, they match
• if $accepted is * or * followed by /*, it matches any $supported value.
• if both $accepted and $supported contain a /, and $accepted ends with /*, they match if the part before the first / is equal.

Parameters

string	$accepted	An accepted value (may contain wildcards)
string	$supported	A supported value.

Returns

bool Whether the given supported value matches the given accepted value.

Definition at line 116 of file HttpAcceptNegotiator.php.

Referenced by Wikimedia\Http\HttpAcceptNegotiator\getFirstSupportedValue().

Member Data Documentation

$defaultValue

string Wikimedia\Http\HttpAcceptNegotiator::$defaultValue

private

Definition at line 27 of file HttpAcceptNegotiator.php.

$supportedValues

string [] Wikimedia\Http\HttpAcceptNegotiator::$supportedValues

private

Definition at line 22 of file HttpAcceptNegotiator.php.

---

The documentation for this class was generated from the following file:

• includes/libs/http/HttpAcceptNegotiator.php