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net_instaweb::InflatingFetch Class Reference

#include "inflating_fetch.h"

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

Public Member Functions

 InflatingFetch (AsyncFetch *fetch)
 
void EnableGzipFromBackend ()
 
- Public Member Functions inherited from net_instaweb::SharedAsyncFetch
 SharedAsyncFetch (AsyncFetch *base_fetch)
 
virtual const RequestContextPtr & request_context ()
 
- Public Member Functions inherited from net_instaweb::AsyncFetch
 AsyncFetch (const RequestContextPtr &request_ctx)
 
void HeadersComplete ()
 
void Done (bool success)
 
virtual bool Write (const StringPiece &content, MessageHandler *handler)
 
virtual bool Flush (MessageHandler *handler)
 
RequestHeaders * request_headers ()
 
void set_request_headers (RequestHeaders *headers)
 
void SetRequestHeadersTakingOwnership (RequestHeaders *headers)
 Same as above, but takes ownership.
 
const RequestHeaders * request_headers () const
 
ResponseHeaders * response_headers ()
 See doc for request_headers and set_request_headers.
 
void set_response_headers (ResponseHeaders *headers)
 
ResponseHeaders * extra_response_headers ()
 
void set_extra_response_headers (ResponseHeaders *headers)
 
bool headers_complete () const
 
bool content_length_known () const
 
int64 content_length () const
 
void set_content_length (int64 x)
 
GoogleString LoggingString ()
 
virtual AbstractLogRecordlog_record ()
 

Protected Member Functions

virtual bool HandleWrite (const StringPiece &sp, MessageHandler *handler)
 
virtual void HandleHeadersComplete ()
 
virtual void HandleDone (bool success)
 
virtual void Reset ()
 
- Protected Member Functions inherited from net_instaweb::SharedAsyncFetch
virtual bool HandleFlush (MessageHandler *handler)
 
virtual bool IsCachedResultValid (const ResponseHeaders &headers)
 
virtual bool IsBackgroundFetch () const
 
void PropagateContentLength ()
 Propagates any set_content_length from this to the base fetch.
 

Additional Inherited Members

- Static Public Attributes inherited from net_instaweb::AsyncFetch
static const int kContentLengthUnknown = -1
 

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

void net_instaweb::InflatingFetch::EnableGzipFromBackend ( )

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 ( )
protectedvirtual

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 
)
protectedvirtual

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 ( )
protectedvirtual

Resets the 'headers_complete_' flag.

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

Reimplemented from net_instaweb::AsyncFetch.


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