mirror of
https://github.com/mozilla/gecko-dev.git
synced 2024-12-01 00:32:11 +00:00
92 lines
4.1 KiB
Plaintext
92 lines
4.1 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 nsICacheEntry;
|
|
interface nsIApplicationCache;
|
|
|
|
[scriptable, uuid(1fc9fe11-c6ac-4748-94bd-8555a5a12b94)]
|
|
interface nsICacheEntryOpenCallback : nsISupports
|
|
{
|
|
/**
|
|
* State of the entry determined by onCacheEntryCheck.
|
|
*
|
|
* ENTRY_WANTED - the consumer is interested in the entry, we will pass it.
|
|
* RECHECK_AFTER_WRITE_FINISHED - the consumer cannot use the entry while data is
|
|
* still being written and wants to check it again after the current write is
|
|
* finished. This actually prevents concurrent read/write and is used with
|
|
* non-resumable HTTP responses.
|
|
* ENTRY_NEEDS_REVALIDATION - entry needs to be revalidated first with origin server,
|
|
* this means the loading channel will decide whether to use the entry content
|
|
* as is after it gets a positive response from the server about validity of the
|
|
* content ; when a new content needs to be loaded from the server, the loading
|
|
* channel opens a new entry with OPEN_TRUNCATE flag which dooms the one
|
|
* this check has been made for.
|
|
* ENTRY_NOT_WANTED - the consumer is not interested in the entry, we will not pass it.
|
|
*/
|
|
const unsigned long ENTRY_WANTED = 0;
|
|
const unsigned long RECHECK_AFTER_WRITE_FINISHED = 1;
|
|
const unsigned long ENTRY_NEEDS_REVALIDATION = 2;
|
|
const unsigned long ENTRY_NOT_WANTED = 3;
|
|
|
|
/**
|
|
* Callback to perform any validity checks before the entry should be used.
|
|
* Called before onCacheEntryAvailable callback, depending on the result it
|
|
* may be called more then one time.
|
|
*
|
|
* This callback is ensured to be called on the same thread on which asyncOpenURI
|
|
* has been called, unless nsICacheStorage.CHECK_MULTITHREADED flag has been specified.
|
|
* In that case this callback can be invoked on any thread, usually it is the cache I/O
|
|
* or cache management thread.
|
|
*
|
|
* IMPORTANT NOTE:
|
|
* This callback may be invoked sooner then respective asyncOpenURI call exits.
|
|
*
|
|
* @param aEntry
|
|
* An entry to examine. Consumer has a chance to decide whether the
|
|
* entry is valid or not.
|
|
* @param aApplicationCache
|
|
* Optional, application cache the entry has been found in, if any.
|
|
* @return
|
|
* State of the entry, see the constants just above.
|
|
*/
|
|
unsigned long onCacheEntryCheck(in nsICacheEntry aEntry,
|
|
in nsIApplicationCache aApplicationCache);
|
|
|
|
/**
|
|
* Callback giving actual result of asyncOpenURI. It may give consumer the cache
|
|
* entry or a failure result when it's not possible to open it from some reason.
|
|
* This callback is ensured to be called on the same thread on which asyncOpenURI
|
|
* has been called.
|
|
*
|
|
* IMPORTANT NOTE:
|
|
* This callback may be invoked sooner then respective asyncOpenURI call exits.
|
|
*
|
|
* @param aEntry
|
|
* The entry bound to the originally requested URI. May be null when
|
|
* loading from a particular application cache and the URI has not
|
|
* been found in that application cache.
|
|
* @param aNew
|
|
* Whether no data so far has been stored for this entry, i.e. reading
|
|
* it will just fail. When aNew is true, a server request should be
|
|
* made and data stored to this new entry.
|
|
* @param aApplicationCache
|
|
* When an entry had been found in an application cache, this is the
|
|
* given application cache. It should be associated with the loading
|
|
* channel.
|
|
* @param aResult
|
|
* Result of the request. This may be a failure only when one of these
|
|
* issues occur:
|
|
* - the cache storage service could not be started due to some unexpected
|
|
* faulure
|
|
* - there is not enough disk space to create new entries
|
|
* - cache entry was not found in a given application cache
|
|
*/
|
|
void onCacheEntryAvailable(in nsICacheEntry aEntry,
|
|
in boolean aNew,
|
|
in nsIApplicationCache aApplicationCache,
|
|
in nsresult aResult);
|
|
};
|