199 lines
7.4 KiB
Plaintext
199 lines
7.4 KiB
Plaintext
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
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/* ***** BEGIN LICENSE BLOCK *****
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* Version: MPL 1.1/GPL 2.0/LGPL 2.1
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*
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* The contents of this file are subject to the Mozilla Public License Version
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* 1.1 (the "License"); you may not use this file except in compliance with
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* the License. You may obtain a copy of the License at
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* http://www.mozilla.org/MPL/
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*
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* Software distributed under the License is distributed on an "AS IS" basis,
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* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
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* for the specific language governing rights and limitations under the
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* License.
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*
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* The Original Code is mozilla.org code.
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*
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* The Initial Developer of the Original Code is
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* Netscape Communications Corporation.
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* Portions created by the Initial Developer are Copyright (C) 1998
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* the Initial Developer. All Rights Reserved.
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*
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* Contributor(s):
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*
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* Alternatively, the contents of this file may be used under the terms of
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* either the GNU General Public License Version 2 or later (the "GPL"), or
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* the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
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* in which case the provisions of the GPL or the LGPL are applicable instead
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* of those above. If you wish to allow use of your version of this file only
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* under the terms of either the GPL or the LGPL, and not to allow others to
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* use your version of this file under the terms of the MPL, indicate your
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* decision by deleting the provisions above and replace them with the notice
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* and other provisions required by the GPL or the LGPL. If you do not delete
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* the provisions above, a recipient may use your version of this file under
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* the terms of any one of the MPL, the GPL or the LGPL.
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*
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* ***** END LICENSE BLOCK ***** */
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#include "nsISupports.idl"
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interface nsILoadGroup;
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typedef unsigned long nsLoadFlags;
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/**
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* nsIRequest
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*
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* @status FROZEN
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*/
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[scriptable, uuid(ef6bfbd2-fd46-48d8-96b7-9f8f0fd387fe)]
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interface nsIRequest : nsISupports
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{
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/**
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* The name of the request. Often this is the URI of the request.
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*/
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readonly attribute AUTF8String name;
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/**
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* @return TRUE if the request has yet to reach completion.
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* @return FALSE if the request has reached completion (e.g., after
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* OnStopRequest has fired).
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* Suspended requests are still considered pending.
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*/
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boolean isPending();
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/**
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* The error status associated with the request.
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*/
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readonly attribute nsresult status;
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/**
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* Cancels the current request. This will close any open input or
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* output streams and terminate any async requests. Users should
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* normally pass NS_BINDING_ABORTED, although other errors may also
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* be passed. The error passed in will become the value of the
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* status attribute.
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*
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* @param aStatus the reason for canceling this request.
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*
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* NOTE: most nsIRequest implementations expect aStatus to be a
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* failure code; however, some implementations may allow aStatus to
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* be a success code such as NS_OK. In general, aStatus should be
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* a failure code.
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*/
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void cancel(in nsresult aStatus);
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/**
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* Suspends the current request. This may have the effect of closing
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* any underlying transport (in order to free up resources), although
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* any open streams remain logically opened and will continue delivering
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* data when the transport is resumed.
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*
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* NOTE: some implementations are unable to immediately suspend, and
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* may continue to deliver events already posted to an event queue. In
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* general, callers should be capable of handling events even after
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* suspending a request.
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*/
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void suspend();
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/**
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* Resumes the current request. This may have the effect of re-opening
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* any underlying transport and will resume the delivery of data to
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* any open streams.
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*/
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void resume();
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/**
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* The load group of this request. While pending, the request is a
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* member of the load group. It is the responsibility of the request
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* to implement this policy.
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*/
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attribute nsILoadGroup loadGroup;
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/**
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* The load flags of this request. Bits 0-15 are reserved.
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*
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* When added to a load group, this request's load flags are merged with
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* the load flags of the load group.
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*/
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attribute nsLoadFlags loadFlags;
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/**************************************************************************
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* Listed below are the various load flags which may be or'd together.
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*/
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/**
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* No special load flags:
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*/
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const unsigned long LOAD_NORMAL = 0;
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/**
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* Don't deliver status notifications to the nsIProgressEventSink, or keep
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* this load from completing the nsILoadGroup it may belong to.
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*/
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const unsigned long LOAD_BACKGROUND = 1 << 0;
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/**************************************************************************
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* The following flags control the flow of data into the cache.
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*/
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/**
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* This flag prevents caching of any kind. It does not, however, prevent
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* cached content from being used to satisfy this request.
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*/
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const unsigned long INHIBIT_CACHING = 1 << 7;
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/**
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* This flag prevents caching on disk (or other persistent media), which
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* may be needed to preserve privacy. For HTTPS, this flag is set auto-
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* matically.
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*/
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const unsigned long INHIBIT_PERSISTENT_CACHING = 1 << 8;
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/**************************************************************************
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* The following flags control what happens when the cache contains data
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* that could perhaps satisfy this request. They are listed in descending
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* order of precidence.
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*/
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/**
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* Force an end-to-end download of content data from the origin server.
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* This flag is used for a shift-reload.
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*/
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const unsigned long LOAD_BYPASS_CACHE = 1 << 9;
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/**
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* Load from the cache, bypassing protocol specific validation logic. This
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* flag is used when browsing via history. It is not recommended for normal
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* browsing as it may likely violate reasonable assumptions made by the
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* server and confuse users.
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*/
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const unsigned long LOAD_FROM_CACHE = 1 << 10;
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/**
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* The following flags control the frequency of cached content validation
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* when neither LOAD_BYPASS_CACHE or LOAD_FROM_CACHE are set. By default,
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* cached content is automatically validated if necessary before reuse.
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*
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* VALIDATE_ALWAYS forces validation of any cached content independent of
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* its expiration time.
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*
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* VALIDATE_NEVER disables validation of expired content.
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*
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* VALIDATE_ONCE_PER_SESSION disables validation of expired content,
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* provided it has already been validated (at least once) since the start
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* of this session.
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*
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* NOTE TO IMPLEMENTORS:
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* These flags are intended for normal browsing, and they should therefore
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* not apply to content that must be validated before each use. Consider,
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* for example, a HTTP response with a "Cache-control: no-cache" header.
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* According to RFC2616, this response must be validated before it can
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* be taken from a cache. Breaking this requirement could result in
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* incorrect and potentially undesirable side-effects.
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*/
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const unsigned long VALIDATE_ALWAYS = 1 << 11;
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const unsigned long VALIDATE_NEVER = 1 << 12;
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const unsigned long VALIDATE_ONCE_PER_SESSION = 1 << 13;
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};
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