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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: */
+/* 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 nsICancelable;
+interface nsIProtocolProxyCallback;
+interface nsIProtocolProxyFilter;
+interface nsIProtocolProxyChannelFilter;
+interface nsIProxyInfo;
+interface nsIChannel;
+interface nsIURI;
+
+/**
+ * nsIProtocolProxyService provides methods to access information about
+ * various network proxies.
+ */
+[scriptable, uuid(ef57c8b6-e09d-4cd4-9222-2a5d2402e15d)]
+interface nsIProtocolProxyService : nsISupports
+{
+ /** Flag 1 << 0 is unused **/
+
+ /**
+ * When the proxy configuration is manual this flag may be passed to the
+ * resolve and asyncResolve methods to request to prefer the SOCKS proxy
+ * to HTTP ones.
+ */
+ const unsigned long RESOLVE_PREFER_SOCKS_PROXY = 1 << 1;
+
+ /**
+ * When the proxy configuration is manual this flag may be passed to the
+ * resolve and asyncResolve methods to request to not analyze the uri's
+ * scheme specific proxy. When this flag is set the main HTTP proxy is the
+ * preferred one.
+ *
+ * NOTE: if RESOLVE_PREFER_SOCKS_PROXY is set then the SOCKS proxy is
+ * the preferred one.
+ *
+ * NOTE: if RESOLVE_PREFER_HTTPS_PROXY is set then the HTTPS proxy
+ * is the preferred one.
+ */
+ const unsigned long RESOLVE_IGNORE_URI_SCHEME = 1 << 2;
+
+ /**
+ * When the proxy configuration is manual this flag may be passed to the
+ * resolve and asyncResolve methods to request to prefer the HTTPS proxy
+ * to the others HTTP ones.
+ *
+ * NOTE: RESOLVE_PREFER_SOCKS_PROXY takes precedence over this flag.
+ *
+ * NOTE: This flag implies RESOLVE_IGNORE_URI_SCHEME.
+ */
+ const unsigned long RESOLVE_PREFER_HTTPS_PROXY =
+ (1 << 3) | RESOLVE_IGNORE_URI_SCHEME;
+
+ /**
+ * When the proxy configuration is manual this flag may be passed to the
+ * resolve and asyncResolve methods to that all methods will be tunneled via
+ * CONNECT through the http proxy.
+ */
+ const unsigned long RESOLVE_ALWAYS_TUNNEL = (1 << 4);
+
+ /**
+ * This method returns via callback a nsIProxyInfo instance that identifies
+ * a proxy to be used for the given channel. Otherwise, this method returns
+ * null indicating that a direct connection should be used.
+ *
+ * @param aChannelOrURI
+ * The channel for which a proxy is to be found, or, if no channel is
+ * available, a URI indicating the same. This method will return
+ * NS_ERROR_NOINTERFACE if this argument isn't either an nsIURI or an
+ * nsIChannel.
+ * @param aFlags
+ * A bit-wise combination of the RESOLVE_ flags defined above. Pass
+ * 0 to specify the default behavior. Any additional bits that do
+ * not correspond to a RESOLVE_ flag are reserved for future use.
+ * @param aCallback
+ * The object to be notified when the result is available.
+ *
+ * @return An object that can be used to cancel the asychronous operation.
+ * If canceled, the cancelation status (aReason) will be forwarded
+ * to the callback's onProxyAvailable method via the aStatus param.
+ *
+ * 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.
+ *
+ * @see nsIProxiedProtocolHandler::newProxiedChannel
+ */
+ nsICancelable asyncResolve(in nsISupports aChannelOrURI, 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
+ * "https" - specifies HTTP proxying over TLS connection to 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, and new types may be defined by a future version of
+ * this interface.
+ * @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 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);
+
+ /**
+ * This method may be called to construct a nsIProxyInfo instance for
+ * with the specified username and password.
+ * Currently implemented for SOCKS proxies only.
+ * @param aType
+ * The proxy type. This is a string value that identifies the proxy
+ * type. Standard values include:
+ * "socks" - specifies a SOCKS version 5 proxy
+ * "socks4" - specifies a SOCKS version 4 proxy
+ * The type name is case-insensitive. Other string values may be
+ * possible, and new types may be defined by a future version of
+ * this interface.
+ * @param aHost
+ * The proxy hostname or IP address.
+ * @param aPort
+ * The proxy port.
+ * @param aUsername
+ * The proxy username
+ * @param aPassword
+ * The proxy password
+ * @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 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 newProxyInfoWithAuth(in ACString aType, in AUTF8String aHost,
+ in long aPort,
+ in ACString aUsername, in ACString aPassword,
+ 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);
+
+ /**
+ * Similar to registerFilter, but accepts an nsIProtocolProxyChannelFilter,
+ * which selects proxies according to channel rather than URI.
+ *
+ * @param aFilter
+ * The nsIProtocolProxyChannelFilter instance to be registered.
+ * @param aPosition
+ * The position of the filter.
+ */
+ void registerChannelFilter(in nsIProtocolProxyChannelFilter 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);
+
+ /**
+ * This method may be used to unregister a proxy channel filter instance. All
+ * filters will be automatically unregistered at XPCOM shutdown.
+ *
+ * @param aFilter
+ * The nsIProtocolProxyChannelFilter instance to be unregistered.
+ */
+ void unregisterChannelFilter(in nsIProtocolProxyChannelFilter aFilter);
+
+ /**
+ * These values correspond to the possible integer values for the
+ * network.proxy.type preference.
+ */
+ const unsigned long PROXYCONFIG_DIRECT = 0;
+ const unsigned long PROXYCONFIG_MANUAL = 1;
+ const unsigned long PROXYCONFIG_PAC = 2;
+ const unsigned long PROXYCONFIG_WPAD = 4;
+ const unsigned long PROXYCONFIG_SYSTEM = 5;
+
+ /**
+ * This attribute specifies the current type of proxy configuration.
+ */
+ readonly attribute unsigned long proxyConfigType;
+};