net_instaweb::JavascriptLibraryIdentification Class Reference

#include "javascript_library_identification.h"

Public Types
typedef uint64	SizeInBytes

Public Member Functions
bool	empty () const
bool	RegisterLibrary (SizeInBytes bytes, StringPiece md5_hash, StringPiece canonical_url)
StringPiece	Find (StringPiece minified_code) const
void	Merge (const JavascriptLibraryIdentification &src)
	Merge libraries recognized by src into this one.
void	AppendSignature (GoogleString *signature) const
	Append a signature for the libraries recognized to *signature.

Static Public Attributes
static const int	kNumHashChars = (126 + 5) / 6
	>=126 bits in base64

Detailed Description

Holds the data necessary to identify the canonical urls of a set of known javascript libraries. We identify a library as "known" on the basis of its minified size in bytes and the web64-encoded md5 hash of its minified code. Minification allows us to tolerate changes in whitespace and the mix of minified and unminified versions of library code one sees served in the wild.

Member Function Documentation

StringPiece net_instaweb::JavascriptLibraryIdentification::Find

(

StringPiece

minified_code

)

const

Find canonical url of library; empty string if none. Storage for url is owned by the JavascriptLibraryIdentification object.

bool net_instaweb::JavascriptLibraryIdentification::RegisterLibrary	(	SizeInBytes	bytes,
		StringPiece	md5_hash,
		StringPiece	canonical_url
	)

Register a library for recognition. False indicates badly-formed hash or url.

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

• net/instaweb/rewriter/public/javascript_library_identification.h