зеркало из https://github.com/mozilla/gecko-dev.git
113 строки
4.4 KiB
Plaintext
113 строки
4.4 KiB
Plaintext
/* This Source Code Form is subject to the terms of the Mozilla Public
|
|
* License, v. 2.0. If a copy of the MPL was not distributed with this
|
|
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
|
|
|
|
#include "nsISupports.idl"
|
|
|
|
interface nsIOutputStream;
|
|
|
|
[scriptable, uuid(72c34415-c6eb-48af-851f-772fa9ee5972)]
|
|
interface nsICacheInfoChannel : nsISupports
|
|
{
|
|
/**
|
|
* Get the number of times the cache entry has been opened. This attribute is
|
|
* equivalent to nsICachingChannel.cacheToken.fetchCount.
|
|
*
|
|
* @throws NS_ERROR_NOT_AVAILABLE if the cache entry or the alternate data
|
|
* cache entry cannot be read.
|
|
*/
|
|
readonly attribute int32_t cacheTokenFetchCount;
|
|
|
|
/**
|
|
* Get expiration time from cache token. This attribute is equivalent to
|
|
* nsICachingChannel.cacheToken.expirationTime.
|
|
*/
|
|
readonly attribute uint32_t cacheTokenExpirationTime;
|
|
|
|
/**
|
|
* Set/get charset of cache entry. Accessing this attribute is equivalent to
|
|
* calling nsICachingChannel.cacheToken.getMetaDataElement("charset") and
|
|
* nsICachingChannel.cacheToken.setMetaDataElement("charset").
|
|
*/
|
|
attribute ACString cacheTokenCachedCharset;
|
|
|
|
/**
|
|
* TRUE if this channel's data is being loaded from the cache. This value
|
|
* is undefined before the channel fires its OnStartRequest notification
|
|
* and after the channel fires its OnStopRequest notification.
|
|
*/
|
|
boolean isFromCache();
|
|
|
|
/**
|
|
* The unique ID of the corresponding nsICacheEntry from which the response is
|
|
* retrieved. By comparing the returned value, we can judge whether the data
|
|
* of two distinct nsICacheInfoChannels is from the same nsICacheEntry. This
|
|
* scenario could be useful when verifying whether the alternative data from
|
|
* one nsICacheInfochannel matches the main data from another one.
|
|
*
|
|
* Note: NS_ERROR_NOT_AVAILABLE is thrown when a nsICacheInfoChannel has no
|
|
* valid corresponding nsICacheEntry.
|
|
*/
|
|
uint64_t getCacheEntryId();
|
|
|
|
/**
|
|
* Set/get the cache key... uniquely identifies the data in the cache
|
|
* for this channel. Holding a reference to this key does NOT prevent
|
|
* the cached data from being removed.
|
|
*
|
|
* A cache key retrieved from a particular instance of nsICacheInfoChannel
|
|
* could be set on another instance of nsICacheInfoChannel provided the
|
|
* underlying implementations are compatible and provided the new
|
|
* channel instance was created with the same URI. The implementation of
|
|
* nsICacheInfoChannel would be expected to use the cache entry identified
|
|
* by the cache token. Depending on the value of nsIRequest::loadFlags,
|
|
* the cache entry may be validated, overwritten, or simply read.
|
|
*
|
|
* The cache key may be NULL indicating that the URI of the channel is
|
|
* sufficient to locate the same cache entry. Setting a NULL cache key
|
|
* is likewise valid.
|
|
*/
|
|
attribute nsISupports cacheKey;
|
|
|
|
/**
|
|
* Tells the channel to behave as if the LOAD_FROM_CACHE flag has been set,
|
|
* but without affecting the loads for the entire loadGroup in case of this
|
|
* channel being the default load group's channel.
|
|
*/
|
|
attribute boolean allowStaleCacheContent;
|
|
|
|
/**
|
|
* Calling this method instructs the channel to serve the alternative data
|
|
* if that was previously saved in the cache, otherwise it will serve the
|
|
* real data.
|
|
* Must be called before AsyncOpen.
|
|
*/
|
|
void preferAlternativeDataType(in ACString type);
|
|
|
|
/**
|
|
* Get the preferred alternative data type set by preferAlternativeDataType().
|
|
* This attribute stands for the desired data type instead of the type of the
|
|
* information retrieved from the network stack.
|
|
*/
|
|
readonly attribute ACString preferredAlternativeDataType;
|
|
|
|
/**
|
|
* Holds the type of the alternative data representation that the channel
|
|
* is returning.
|
|
* Is empty string if no alternative data representation was requested, or
|
|
* if the requested representation wasn't found in the cache.
|
|
* Can only be called during or after OnStartRequest.
|
|
*/
|
|
readonly attribute ACString alternativeDataType;
|
|
|
|
/**
|
|
* Opens and returns an output stream that a consumer may use to save an
|
|
* alternate representation of the data.
|
|
* Must be called after the OnStopRequest that delivered the real data.
|
|
* The consumer may choose to replace the saved alt representation.
|
|
* Opening the output stream will fail if there are any open input streams
|
|
* reading the already saved alt representation.
|
|
*/
|
|
nsIOutputStream openAlternativeOutputStream(in ACString type);
|
|
};
|