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- /* -*- Mode: IDL; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
- /* vim:set ts=4 sw=4 sts=4 et: */
- /* ***** 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 mozilla.org code.
- *
- * The Initial Developer of the Original Code is
- * Netscape Communications Corporation.
- * Portions created by the Initial Developer are Copyright (C) 1998
- * the Initial Developer. All Rights Reserved.
- *
- * Contributor(s):
- * Darin Fisher <darin@meer.net>
- *
- * 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 "nsISupports.idl"
-
- interface nsICancelable;
- interface nsIProtocolProxyCallback;
- interface nsIProtocolProxyFilter;
- interface nsIProxyInfo;
- interface nsIChannel;
- interface nsIURI;
-
- /**
- * nsIProtocolProxyService provides methods to access information about
- * various network proxies.
- *
- * @status UNDER_REVIEW
- */
- [scriptable, uuid(e38ab577-786e-4a7f-936b-7ae4c7d877b2)]
- interface nsIProtocolProxyService : nsISupports
- {
- /**
- * This flag may be passed to the resolve method to request that it fail
- * instead of block the calling thread. Proxy Auto Config (PAC) may
- * perform a synchronous DNS query, which may not return immediately. So,
- * calling resolve without this flag may result in locking up the calling
- * thread for a lengthy period of time.
- *
- * By passing this flag to resolve, one can failover to asyncResolve to
- * avoid locking up the calling thread if a PAC query is required.
- *
- * When this flag is passed to resolve, resolve may throw the exception
- * NS_BASE_STREAM_WOULD_BLOCK to indicate that it failed due to this flag
- * being present.
- */
- const unsigned long RESOLVE_NON_BLOCKING = 1;
-
- /**
- * This method returns a nsIProxyInfo instance that identifies a proxy to
- * be used for loading the given URI. Otherwise, this method returns null
- * indicating that a direct connection should be used.
- *
- * @param aURI
- * The URI to test.
- * @param aFlags
- * A bit-wise OR of the RESOLVE_ flags defined above. Pass 0 to
- * specify the default behavior.
- *
- * NOTE: If this proxy is unavailable, getFailoverForProxy may be called
- * to determine the correct secondary proxy to be used.
- *
- * NOTE: If the protocol handler for the given URI supports
- * nsIProxiedProtocolHandler, then the nsIProxyInfo instance returned from
- * resolve may be passed to the newProxiedChannel method to create a
- * nsIChannel to the given URI that uses the specified proxy.
- *
- * NOTE: However, if the nsIProxyInfo type is "http", then it means that
- * the given URI should be loaded using the HTTP protocol handler, which
- * also supports nsIProxiedProtocolHandler.
- *
- * NOTE: If PAC is configured, and the PAC file has not yet been loaded,
- * then this method will return a nsIProxyInfo instance with a type of
- * "unknown" to indicate to the consumer that asyncResolve should be used
- * to wait for the PAC file to finish loading. Otherwise, the consumer
- * may choose to treat the result as type "direct" if desired.
- *
- * @see nsIProxiedProtocolHandler::newProxiedChannel
- */
- nsIProxyInfo resolve(in nsIURI aURI, in unsigned long aFlags);
-
- /**
- * This method is an asychronous version of the resolve method. Unlike
- * resolve, this method is guaranteed not to block the calling thread
- * waiting for DNS queries to complete. This method is intended as a
- * substitute for resolve when the result is not needed immediately.
- *
- * @param aURI
- * The URI to test.
- * @param aFlags
- * A bit-wise OR of the RESOLVE_ flags defined above. Pass 0 to
- * specify the default behavior.
- * @param aCallback
- * The object to be notified when the result is available.
- *
- * @return An object that can be used to cancel the asychronous operation.
- */
- nsICancelable asyncResolve(in nsIURI aURI, in unsigned long aFlags,
- in nsIProtocolProxyCallback aCallback);
-
- /**
- * This method may be called to construct a nsIProxyInfo instance from
- * the given parameters. This method may be useful in conjunction with
- * nsISocketTransportService::createTransport for creating, for example,
- * a SOCKS connection.
- *
- * @param aType
- * The proxy type. This is a string value that identifies the proxy
- * type. Standard values include:
- * "http" - specifies a HTTP proxy
- * "socks" - specifies a SOCKS version 5 proxy
- * "socks4" - specifies a SOCKS version 4 proxy
- * "direct" - specifies a direct connection (useful for failover)
- * The type name is case-insensitive. Other string values may be
- * possible.
- * @param aHost
- * The proxy hostname or IP address.
- * @param aPort
- * The proxy port.
- * @param aFlags
- * Flags associated with this connection. See nsIProxyInfo.idl
- * for currently defined flags.
- * @param aFailoverTimeout
- * Specifies the length of time (in seconds) to ignore this proxy if
- * this proxy fails. Pass PR_UINT32_MAX to specify the default
- * timeout value, causing nsIProxyInfo::failoverTimeout to be
- * assigned the default value.
- * @param aFailoverProxy
- * Specifies the next proxy to try if this proxy fails. This
- * parameter may be null.
- */
- nsIProxyInfo newProxyInfo(in ACString aType, in AUTF8String aHost,
- in long aPort, in unsigned long aFlags,
- in unsigned long aFailoverTimeout,
- in nsIProxyInfo aFailoverProxy);
-
- /**
- * If the proxy identified by aProxyInfo is unavailable for some reason,
- * this method may be called to access an alternate proxy that may be used
- * instead. As a side-effect, this method may affect future result values
- * from resolve/asyncResolve as well as from getFailoverForProxy.
- *
- * @param aProxyInfo
- * The proxy that was unavailable.
- * @param aURI
- * The URI that was originally passed to resolve/asyncResolve.
- * @param aReason
- * The error code corresponding to the proxy failure. This value
- * may be used to tune the delay before this proxy is used again.
- *
- * @throw NS_ERROR_NOT_AVAILABLE if there is no alternate proxy available.
- */
- nsIProxyInfo getFailoverForProxy(in nsIProxyInfo aProxyInfo,
- in nsIURI aURI,
- in nsresult aReason);
-
- /**
- * This method may be used to register a proxy filter instance. Each proxy
- * filter is registered with an associated position that determines the
- * order in which the filters are applied (starting from position 0). When
- * resolve/asyncResolve is called, it generates a list of proxies for the
- * given URI, and then it applies the proxy filters. The filters have the
- * opportunity to modify the list of proxies.
- *
- * If two filters register for the same position, then the filters will be
- * visited in the order in which they were registered.
- *
- * If the filter is already registered, then its position will be updated.
- *
- * After filters have been run, any disabled or disallowed proxies will be
- * removed from the list. A proxy is disabled if it had previously failed-
- * over to another proxy (see getFailoverForProxy). A proxy is disallowed,
- * for example, if it is a HTTP proxy and the nsIProtocolHandler for the
- * queried URI does not permit proxying via HTTP.
- *
- * If a nsIProtocolHandler disallows all proxying, then filters will never
- * have a chance to intercept proxy requests for such URLs.
- *
- * @param aFilter
- * The nsIProtocolProxyFilter instance to be registered.
- * @param aPosition
- * The position of the filter.
- *
- * NOTE: It is possible to construct filters that compete with one another
- * in undesirable ways. This API does not attempt to protect against such
- * problems. It is recommended that any extensions that choose to call
- * this method make their position value configurable at runtime (perhaps
- * via the preferences service).
- */
- void registerFilter(in nsIProtocolProxyFilter aFilter,
- in unsigned long aPosition);
-
- /**
- * This method may be used to unregister a proxy filter instance. All
- * filters will be automatically unregistered at XPCOM shutdown.
- *
- * @param aFilter
- * The nsIProtocolProxyFilter instance to be unregistered.
- */
- void unregisterFilter(in nsIProtocolProxyFilter aFilter);
- };
-