Page Speed Optimization Libraries  1.5.27.2
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Public Member Functions | Protected Member Functions
net_instaweb::InflatingFetch Class Reference

#include "inflating_fetch.h"

Inheritance diagram for net_instaweb::InflatingFetch:
net_instaweb::SharedAsyncFetch net_instaweb::AsyncFetch net_instaweb::Writer

List of all members.

Public Member Functions

 InflatingFetch (AsyncFetch *fetch)
void set_inflation_content_type_blacklist (const std::set< const ContentType * > &bypass_set)
void EnableGzipFromBackend ()

Protected Member Functions

virtual bool HandleWrite (const StringPiece &sp, MessageHandler *handler)
virtual void HandleHeadersComplete ()
virtual void HandleDone (bool success)
virtual void Reset ()

Detailed Description

This Fetch layer helps work with origin servers that serve gzipped content even when request-headers do not include accept-encoding:gzip. In that scenario, this class inflates the content and strips the content-encoding:gzip response header.

Some servers will serve gzipped content even to clients that didn't ask for it. Depending on the serving environment, we may also want to ask backend servers for gzipped content even if we want cleartext to be sent to the Write methods. Users of this class can force this by calling EnableGzipFromBackend.


Member Function Documentation

Adds accept-encoding:gzip to the request headers sent to the origin. The data is inflated as we Write it. If deflate or gzip was already in the request then this has no effect.

virtual void net_instaweb::InflatingFetch::HandleHeadersComplete ( ) [protected, virtual]

Analyzes headers and depending on the request settings and flags will either setup inflater or not.

Reimplemented from net_instaweb::SharedAsyncFetch.

virtual bool net_instaweb::InflatingFetch::HandleWrite ( const StringPiece &  sp,
MessageHandler handler 
) [protected, virtual]

If inflation is required, inflates and passes bytes to the linked fetch, otherwise just passes bytes.

Reimplemented from net_instaweb::SharedAsyncFetch.

virtual void net_instaweb::InflatingFetch::Reset ( ) [protected, virtual]

Resets the 'headers_complete_' flag.

Todo:
TODO(jmarantz): should this also clear the response headers?

Reimplemented from net_instaweb::AsyncFetch.

void net_instaweb::InflatingFetch::set_inflation_content_type_blacklist ( const std::set< const ContentType * > &  bypass_set) [inline]

Use this one cautiously, since it may cause resources to be corrupted if you use it with anything other than the IPRO path. Note, that if NULL is contained in the bypass_set then resources with unknown content type will not be inflated.


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