#include "user_agent_matcher.h"

Public Types
enum	DeviceType { kDesktop, kTablet, kMobile, kEndOfDeviceType }

Public Member Functions
bool	IsIe (const StringPiece &user_agent) const

bool	IsIe9 (const StringPiece &user_agent) const

virtual bool	SupportsImageInlining (const StringPiece &user_agent) const

bool	SupportsLazyloadImages (StringPiece user_agent) const

virtual DeviceType	GetDeviceTypeForUA (const StringPiece &user_agent) const
	Returns the DeviceType for the given user agent string.

virtual DeviceType	GetDeviceTypeForUAAndHeaders (const StringPiece &user_agent, const RequestHeaders *request_headers) const

bool	SupportsJsDefer (const StringPiece &user_agent, bool allow_mobile) const

bool	LegacyWebp (const StringPiece &user_agent) const

bool	SupportsWebpLosslessAlpha (const StringPiece &user_agent) const

bool	SupportsWebpAnimated (const StringPiece &user_agent) const

bool	SupportsDnsPrefetchUsingRelPrefetch (const StringPiece &user_agent) const

bool	SupportsDnsPrefetch (const StringPiece &user_agent) const

virtual bool	IsAndroidUserAgent (const StringPiece &user_agent) const

virtual bool	IsiOSUserAgent (const StringPiece &user_agent) const

virtual bool	GetChromeBuildNumber (const StringPiece &user_agent, int major, int minor, int build, int patch) const

bool	UserAgentExceedsChromeAndroidBuildAndPatch (const StringPiece &user_agent, int required_build, int required_patch) const

bool	UserAgentExceedsChromeiOSBuildAndPatch (const StringPiece &user_agent, int required_build, int required_patch) const

bool	UserAgentExceedsChromeBuildAndPatch (const StringPiece &user_agent, int required_build, int required_patch) const

bool	SupportsMobilization (StringPiece user_agent) const

Static Public Member Functions
static StringPiece	DeviceTypeString (DeviceType device_type)

static StringPiece	DeviceTypeSuffix (DeviceType device_type)
	Returns the suffix for the given device_type.

Static Public Attributes
static const char	kTestUserAgentWebP []

static const char	kTestUserAgentNoWebP []
	Note that this must not contain the substring "webp". More...

Detailed Description

This class contains various user agent based checks. Currently all of these are based on simple wildcard based white- and black-lists.

Todo:: TODO(sriharis): Split the functionality here into two: a matcher that pulls out all relevant information from UA strings (browser-family, version, mobile/tablet/desktop, etc.), and a query interface that can be used by clients.

Member Enumeration Documentation

enum net_instaweb::UserAgentMatcher::DeviceType

Enumerator
kEndOfDeviceType	This should always be the last type. This is used to mark the size of an array containing various DeviceTypes.

Member Function Documentation

static StringPiece net_instaweb::UserAgentMatcher::DeviceTypeString ( DeviceType device_type )

static

Returns a string representing the device_type ("desktop", "tablet", or "mobile").

virtual bool net_instaweb::UserAgentMatcher::GetChromeBuildNumber	(	const StringPiece &	user_agent,
		int *	major,
		int *	minor,
		int *	build,
		int *	patch
	)		const

virtual

Returns false if this is not a Chrome user agent, or parsing the string build number fails.

virtual DeviceType net_instaweb::UserAgentMatcher::GetDeviceTypeForUAAndHeaders	(	const StringPiece &	user_agent,
		const RequestHeaders *	request_headers
	)		const

virtual

Returns the DeviceType using the given user agent string and request headers.

bool net_instaweb::UserAgentMatcher::IsIe ( const StringPiece & user_agent ) const

Before calling IsIe, ask if you're doing the right thing: are you doing something that will mess up IE 11 in standards mode? Are you in a position where you can't tell what compatibility mode IE 11 is in? Right now we use this only to force edge compatibility mode and to work around a persistent IE Vary: caching bug.

bool net_instaweb::UserAgentMatcher::LegacyWebp ( const StringPiece & user_agent ) const

Returns true if the user agent includes a legacy browser that supports webp, but does not issue Accept:image/webp. At the moment, this means only Android 4.0+ (excluding Firefox).

bool net_instaweb::UserAgentMatcher::SupportsDnsPrefetchUsingRelPrefetch ( const StringPiece & user_agent ) const

IE9 does not implement <link rel=dns-prefetch ...>. Instead it does DNS preresolution when it sees <link rel=prefetch ...>. This method returns true if the browser support DNS prefetch using rel=prefetch. Refer: http://blogs.msdn.com/b/ie/archive/2011/03/17/internet-explorer-9-network-performance-improvements.aspx NOLINT

bool net_instaweb::UserAgentMatcher::SupportsWebpAnimated ( const StringPiece & user_agent ) const

Returns true if the user agent includes an animated WebP capable sub-string. If the browser does indeed support WebP, it also needs to send out an "accept: webp" header.

bool net_instaweb::UserAgentMatcher::SupportsWebpLosslessAlpha ( const StringPiece & user_agent ) const

Returns true if the user agent includes a string indicating WebP lossy or WebP alpha support. If the browser does indeed support WebP, it also needs to send out an "accept: webp" header.

Member Data Documentation

const char net_instaweb::UserAgentMatcher::kTestUserAgentNoWebP[]

static

Note that this must not contain the substring "webp".

non-webp user agent

const char net_instaweb::UserAgentMatcher::kTestUserAgentWebP[]

static

webp user agent

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

pagespeed/kernel/http/user_agent_matcher.h

Public Types

Public Member Functions

Static Public Member Functions

Static Public Attributes

Detailed Description

Member Enumeration Documentation

Member Function Documentation

Member Data Documentation