Page Speed Optimization Libraries  1.2.24.1
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net_instaweb::ImageUrlEncoder Class Reference

#include "image_url_encoder.h"

Inheritance diagram for net_instaweb::ImageUrlEncoder:
net_instaweb::UrlSegmentEncoder

List of all members.

Public Member Functions

virtual void Encode (const StringVector &urls, const ResourceContext *dim, GoogleString *rewritten_url) const
virtual bool Decode (const StringPiece &url_segment, StringVector *urls, ResourceContext *dim, MessageHandler *handler) const

Static Public Member Functions

static bool HasDimensions (const ResourceContext &data)
static bool HasValidDimensions (const ImageDim &dims)
static bool HasDimension (const ResourceContext &data)
static bool HasValidDimension (const ImageDim &dims)

Detailed Description

This class implements the encoding of image urls with optional additional dimension metadata. It basically prepends characters indicating image dimensions on the page, webp eligibility, and mobile user agent eligibility (this information is conveyed in the ResourceContext). http://...path.../50x75xurl... No webp, image is 50x75 on page http://...path.../50x75wurl... Webp requested, image is 50x75 on page http://...path.../50x75mxurl... No webp, for mobile user agent, image is 50x75 on page http://...path.../50x75mwurl... Webp requested, for mobile user agent, image is 50x75 on page http://...path.../50xNxurl.. No webp, image is 50 wide, no height given http://...path.../50xNwurl... Webp, image is 50 wide, no height given http://...path.../Nx75xurl... No webp, image is 75 high, no width given http://...path.../Nx75wurl... Webp, image is 75 high, no width given. http://...path.../50xNmxurl.. No webp, image is 50 wide, mobile http://...path.../50xNmwurl... Webp, image is 50 wide, mobile http://...path.../Nx75mxurl... No webp, image is 75 high, mobile http://...path.../Nx75mwurl... Webp, image is 75 high, mobile http://...path.../xurl... Page does not specify both dimensions. No webp. http://...path.../wurl... Webp requested, page missing dimensions. http://...path.../xurl... Page does not specify any dimension. No webp. http://...path.../wurl... Webp requested, page missing either dimension. http://...path.../mxurl... No webp, for mobile user agent, page does not specify dimensions. http://...path.../mwurl... Webp requested, for mobile user agent, page missing dimensions.


Member Function Documentation

virtual bool net_instaweb::ImageUrlEncoder::Decode ( const StringPiece &  url_segment,
StringVector *  urls,
ResourceContext *  out_data,
MessageHandler handler 
) const [virtual]

Decode URLs from "url_segment". Note that there may be other meta-data encoded in url_segment, which this function will write into out_data, if present.

Reimplemented from net_instaweb::UrlSegmentEncoder.

virtual void net_instaweb::ImageUrlEncoder::Encode ( const StringVector &  urls,
const ResourceContext *  data,
GoogleString url_segment 
) const [virtual]

Encodes arbitrary text so it can be used in a url segment. A url segment must contain only characters that are legal in URLs, and exclude "/" and "." which are used for a higher level encoding scheme into which this must fit.

'data' is optional -- it can be NULL and it is up to the encoder to decide what to do.

Reimplemented from net_instaweb::UrlSegmentEncoder.


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