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- /* -*- Mode: IDL; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*-
- *
- * ***** BEGIN LICENSE BLOCK *****
- * Version: MPL 1.1/GPL 2.0/LGPL 2.1
- *
- * The contents of this file are subject to the Mozilla Public License Version
- * 1.1 (the "License"); you may not use this file except in compliance with
- * the License. You may obtain a copy of the License at
- * http://www.mozilla.org/MPL/
- *
- * Software distributed under the License is distributed on an "AS IS" basis,
- * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
- * for the specific language governing rights and limitations under the
- * License.
- *
- * The Original Code is nsICacheEntryDescriptor.idl, released
- * February 10, 2001.
- *
- * The Initial Developer of the Original Code is
- * Netscape Communications Corporation.
- * Portions created by the Initial Developer are Copyright (C) 2001
- * the Initial Developer. All Rights Reserved.
- *
- * Contributor(s):
- * Gordon Sheridan <gordon@netscape.com>
- * Patrick Beard <beard@netscape.com>
- * Darin Fisher <darin@netscape.com>
- *
- * Alternatively, the contents of this file may be used under the terms of
- * either the GNU General Public License Version 2 or later (the "GPL"), or
- * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
- * in which case the provisions of the GPL or the LGPL are applicable instead
- * of those above. If you wish to allow use of your version of this file only
- * under the terms of either the GPL or the LGPL, and not to allow others to
- * use your version of this file under the terms of the MPL, indicate your
- * decision by deleting the provisions above and replace them with the notice
- * and other provisions required by the GPL or the LGPL. If you do not delete
- * the provisions above, a recipient may use your version of this file under
- * the terms of any one of the MPL, the GPL or the LGPL.
- *
- * ***** END LICENSE BLOCK ***** */
-
- #include "nsICacheVisitor.idl"
- #include "nsICache.idl"
-
- interface nsISimpleEnumerator;
- interface nsICacheListener;
- interface nsIInputStream;
- interface nsIOutputStream;
- interface nsIFile;
- interface nsICacheMetaDataVisitor;
-
-
- [scriptable, uuid(49c1a11d-f5d2-4f09-8262-551e64908ada)]
- interface nsICacheEntryDescriptor : nsICacheEntryInfo
- {
- /**
- * Set the time at which the cache entry should be considered invalid (in
- * seconds since the Epoch).
- */
- void setExpirationTime(in PRUint32 expirationTime);
-
- /**
- * Set the cache entry data size. This will fail if the cache entry
- * IS stream based.
- */
- void setDataSize(in unsigned long size);
-
- /**
- * Open blocking input stream to cache data. This will fail if the cache
- * entry IS NOT stream based. Use the stream transport service to
- * asynchronously read this stream on a background thread. The returned
- * stream MAY implement nsISeekableStream.
- *
- * @param offset
- * read starting from this offset into the cached data. an offset
- * beyond the end of the stream has undefined consequences.
- *
- * @return blocking, unbuffered input stream.
- */
- nsIInputStream openInputStream(in unsigned long offset);
-
- /**
- * Open blocking output stream to cache data. This will fail if the cache
- * entry IS NOT stream based. Use the stream transport service to
- * asynchronously write to this stream on a background thread. The returned
- * stream MAY implement nsISeekableStream.
- *
- * If opening an output stream to existing cached data, the data will be
- * truncated to the specified offset.
- *
- * @param offset
- * write starting from this offset into the cached data. an offset
- * beyond the end of the stream has undefined consequences.
- *
- * @return blocking, unbuffered output stream.
- */
- nsIOutputStream openOutputStream(in unsigned long offset);
-
- /**
- * Get/set the cache data element. This will fail if the cache entry
- * IS stream based. The cache entry holds a strong reference to this
- * object. The object will be released when the cache entry is destroyed.
- */
- attribute nsISupports cacheElement;
-
- /**
- * Get the access granted to this descriptor. See nsICache.idl for the
- * definitions of the access modes and a thorough description of their
- * corresponding meanings.
- */
- readonly attribute nsCacheAccessMode accessGranted;
-
- /**
- * Get/set the storage policy of the cache entry. See nsICache.idl for
- * the definitions of the storage policies.
- */
- attribute nsCacheStoragePolicy storagePolicy;
-
- /**
- * Get the disk file associated with the cache entry.
- */
- readonly attribute nsIFile file;
-
- /**
- * Get/set security info on the cache entry for this descriptor. This fails
- * if the storage policy is not STORE_IN_MEMORY.
- */
- attribute nsISupports securityInfo;
-
- /**
- * Doom the cache entry this descriptor references in order to slate it for
- * removal. Once doomed a cache entry cannot be undoomed.
- *
- * A descriptor with WRITE access can doom the cache entry and choose to
- * fail pending requests. This means that pending requests will not get
- * a cache descriptor. This is meant as a tool for clients that wish to
- * instruct pending requests to skip the cache.
- */
- void doom();
- void doomAndFailPendingRequests(in nsresult status);
-
- /**
- * A writer must validate this cache object before any readers are given
- * a descriptor to the object.
- */
- void markValid();
-
- /**
- * Explicitly close the descriptor (optional).
- */
-
- void close();
-
- /**
- * Methods for accessing meta data. Meta data is a table of key/value
- * string pairs. The strings do not have to conform to any particular
- * charset, but they must be null terminated.
- */
- string getMetaDataElement(in string key);
- void setMetaDataElement(in string key, in string value);
-
- /**
- * Visitor will be called with key/value pair for each meta data element.
- */
- void visitMetaData(in nsICacheMetaDataVisitor visitor);
- };
-
-
-
- [scriptable, uuid(22f9a49c-3cf8-4c23-8006-54efb11ac562)]
- interface nsICacheMetaDataVisitor : nsISupports
- {
- /**
- * Called for each key/value pair in the meta data for a cache entry
- */
- boolean visitMetaDataElement(in string key,
- in string value);
- };
-