зеркало из https://github.com/mozilla/pjs.git
975 строки
33 KiB
C++
975 строки
33 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode:nil; c-basic-offset: 2 -*- */
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/* vim:set ts=2 sts=2 sw=2 et cin: */
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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) 1999
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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 of the GNU General Public License Version 2 or later (the "GPL"),
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* or 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 "nsURILoader.h"
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#include "nsAutoPtr.h"
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#include "nsIURIContentListener.h"
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#include "nsIContentHandler.h"
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#include "nsILoadGroup.h"
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#include "nsIDocumentLoader.h"
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#include "nsIWebProgress.h"
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#include "nsIWebProgressListener.h"
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#include "nsIIOService.h"
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#include "nsIServiceManager.h"
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#include "nsIStreamListener.h"
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#include "nsIURI.h"
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#include "nsIChannel.h"
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#include "nsIInterfaceRequestor.h"
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#include "nsIInterfaceRequestorUtils.h"
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#include "nsIProgressEventSink.h"
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#include "nsIInputStream.h"
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#include "nsIStreamConverterService.h"
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#include "nsWeakReference.h"
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#include "nsIHttpChannel.h"
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#include "nsIMultiPartChannel.h"
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#include "netCore.h"
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#include "nsCRT.h"
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#include "nsIDocShell.h"
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#include "nsIDocShellTreeItem.h"
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#include "nsIDocShellTreeOwner.h"
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#include "nsXPIDLString.h"
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#include "nsString.h"
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#include "nsIDOMWindowInternal.h"
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#include "nsReadableUtils.h"
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#include "nsDOMError.h"
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#include "nsICategoryManager.h"
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#include "nsCExternalHandlerService.h" // contains contractids for the helper app service
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#include "nsIMIMEHeaderParam.h"
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#include "nsNetCID.h"
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#include "nsMimeTypes.h"
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#include "nsDocLoader.h"
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#ifdef PR_LOGGING
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PRLogModuleInfo* nsURILoader::mLog = nsnull;
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#endif
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#define LOG(args) PR_LOG(nsURILoader::mLog, PR_LOG_DEBUG, args)
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#define LOG_ERROR(args) PR_LOG(nsURILoader::mLog, PR_LOG_ERROR, args)
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#define LOG_ENABLED() PR_LOG_TEST(nsURILoader::mLog, PR_LOG_DEBUG)
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/**
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* The nsDocumentOpenInfo contains the state required when a single
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* document is being opened in order to discover the content type...
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* Each instance remains alive until its target URL has been loaded
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* (or aborted).
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*/
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class nsDocumentOpenInfo : public nsIStreamListener
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{
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public:
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// Needed for nsCOMPtr to work right... Don't call this!
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nsDocumentOpenInfo();
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// Real constructor
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// aFlags is a combination of the flags on nsIURILoader
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nsDocumentOpenInfo(nsIInterfaceRequestor* aWindowContext,
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PRUint32 aFlags,
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nsURILoader* aURILoader);
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NS_DECL_ISUPPORTS
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/**
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* Prepares this object for receiving data. The stream
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* listener methods of this class must not be called before calling this
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* method.
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*/
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nsresult Prepare();
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// Call this (from OnStartRequest) to attempt to find an nsIStreamListener to
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// take the data off our hands.
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nsresult DispatchContent(nsIRequest *request, nsISupports * aCtxt);
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// Call this if we need to insert a stream converter from aSrcContentType to
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// aOutContentType into the StreamListener chain. DO NOT call it if the two
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// types are the same, since no conversion is needed in that case.
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nsresult ConvertData(nsIRequest *request,
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nsIURIContentListener *aListener,
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const nsACString & aSrcContentType,
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const nsACString & aOutContentType);
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/**
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* Function to attempt to use aListener to handle the load. If
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* PR_TRUE is returned, nothing else needs to be done; if PR_FALSE
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* is returned, then a different way of handling the load should be
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* tried.
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*/
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PRBool TryContentListener(nsIURIContentListener* aListener,
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nsIChannel* aChannel);
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// nsIRequestObserver methods:
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NS_DECL_NSIREQUESTOBSERVER
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// nsIStreamListener methods:
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NS_DECL_NSISTREAMLISTENER
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protected:
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~nsDocumentOpenInfo();
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protected:
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/**
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* The first content listener to try dispatching data to. Typically
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* the listener associated with the entity that originated the load.
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*/
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nsCOMPtr<nsIURIContentListener> m_contentListener;
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/**
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* The stream listener to forward nsIStreamListener notifications
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* to. This is set once the load is dispatched.
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*/
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nsCOMPtr<nsIStreamListener> m_targetStreamListener;
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/**
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* A pointer to the entity that originated the load. We depend on getting
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* things like nsIURIContentListeners, nsIDOMWindows, etc off of it.
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*/
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nsCOMPtr<nsIInterfaceRequestor> m_originalContext;
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/**
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* IS_CONTENT_PREFERRED is used for the boolean to pass to CanHandleContent
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* (also determines whether we use CanHandleContent or IsPreferred).
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* DONT_RETARGET means that we will only try m_originalContext, no other
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* listeners.
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*/
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PRUint32 mFlags;
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/**
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* The type of the data we will be trying to dispatch.
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*/
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nsCString mContentType;
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/**
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* Reference to the URILoader service so we can access its list of
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* nsIURIContentListeners.
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*/
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nsRefPtr<nsURILoader> mURILoader;
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};
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NS_IMPL_THREADSAFE_ADDREF(nsDocumentOpenInfo)
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NS_IMPL_THREADSAFE_RELEASE(nsDocumentOpenInfo)
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NS_INTERFACE_MAP_BEGIN(nsDocumentOpenInfo)
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NS_INTERFACE_MAP_ENTRY_AMBIGUOUS(nsISupports, nsIRequestObserver)
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NS_INTERFACE_MAP_ENTRY(nsIRequestObserver)
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NS_INTERFACE_MAP_ENTRY(nsIStreamListener)
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NS_INTERFACE_MAP_END_THREADSAFE
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nsDocumentOpenInfo::nsDocumentOpenInfo()
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{
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NS_NOTREACHED("This should never be called\n");
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}
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nsDocumentOpenInfo::nsDocumentOpenInfo(nsIInterfaceRequestor* aWindowContext,
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PRUint32 aFlags,
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nsURILoader* aURILoader)
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: m_originalContext(aWindowContext),
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mFlags(aFlags),
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mURILoader(aURILoader)
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{
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}
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nsDocumentOpenInfo::~nsDocumentOpenInfo()
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{
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}
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nsresult nsDocumentOpenInfo::Prepare()
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{
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LOG(("[0x%p] nsDocumentOpenInfo::Prepare", this));
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nsresult rv;
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// ask our window context if it has a uri content listener...
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m_contentListener = do_GetInterface(m_originalContext, &rv);
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return rv;
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}
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NS_IMETHODIMP nsDocumentOpenInfo::OnStartRequest(nsIRequest *request, nsISupports * aCtxt)
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{
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LOG(("[0x%p] nsDocumentOpenInfo::OnStartRequest", this));
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nsresult rv = NS_OK;
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//
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// Deal with "special" HTTP responses:
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//
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// - In the case of a 204 (No Content) or 205 (Reset Content) response, do
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// not try to find a content handler. Return NS_BINDING_ABORTED to cancel
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// the request. This has the effect of ensuring that the DocLoader does
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// not try to interpret this as a real request.
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//
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nsCOMPtr<nsIHttpChannel> httpChannel(do_QueryInterface(request, &rv));
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if (NS_SUCCEEDED(rv)) {
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PRUint32 responseCode = 0;
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rv = httpChannel->GetResponseStatus(&responseCode);
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if (NS_FAILED(rv)) {
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LOG_ERROR((" Failed to get HTTP response status"));
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// behave as in the canceled case
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return NS_OK;
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}
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LOG((" HTTP response status: %d", responseCode));
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if (204 == responseCode || 205 == responseCode) {
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return NS_BINDING_ABORTED;
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}
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}
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//
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// Make sure that the transaction has succeeded, so far...
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//
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nsresult status;
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rv = request->GetStatus(&status);
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NS_ASSERTION(NS_SUCCEEDED(rv), "Unable to get request status!");
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if (NS_FAILED(rv)) return rv;
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if (NS_FAILED(status)) {
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LOG_ERROR((" Request failed, status: 0x%08X", rv));
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//
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// The transaction has already reported an error - so it will be torn
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// down. Therefore, it is not necessary to return an error code...
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//
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return NS_OK;
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}
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rv = DispatchContent(request, aCtxt);
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LOG((" After dispatch, m_targetStreamListener: 0x%p, rv: 0x%08X", m_targetStreamListener.get(), rv));
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NS_ASSERTION(NS_SUCCEEDED(rv) || !m_targetStreamListener,
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"Must not have an m_targetStreamListener with a failure return!");
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NS_ENSURE_SUCCESS(rv, rv);
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if (m_targetStreamListener)
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rv = m_targetStreamListener->OnStartRequest(request, aCtxt);
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LOG((" OnStartRequest returning: 0x%08X", rv));
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return rv;
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}
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NS_IMETHODIMP nsDocumentOpenInfo::OnDataAvailable(nsIRequest *request, nsISupports * aCtxt,
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nsIInputStream * inStr, PRUint32 sourceOffset, PRUint32 count)
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{
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// if we have retarged to the end stream listener, then forward the call....
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// otherwise, don't do anything
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nsresult rv = NS_OK;
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if (m_targetStreamListener)
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rv = m_targetStreamListener->OnDataAvailable(request, aCtxt, inStr, sourceOffset, count);
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return rv;
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}
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NS_IMETHODIMP nsDocumentOpenInfo::OnStopRequest(nsIRequest *request, nsISupports *aCtxt,
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nsresult aStatus)
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{
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LOG(("[0x%p] nsDocumentOpenInfo::OnStopRequest", this));
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if ( m_targetStreamListener)
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{
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nsCOMPtr<nsIStreamListener> listener(m_targetStreamListener);
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// If this is a multipart stream, we could get another
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// OnStartRequest after this... reset state.
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m_targetStreamListener = 0;
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mContentType.Truncate();
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listener->OnStopRequest(request, aCtxt, aStatus);
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}
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// Remember...
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// In the case of multiplexed streams (such as multipart/x-mixed-replace)
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// these stream listener methods could be called again :-)
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//
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return NS_OK;
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}
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nsresult nsDocumentOpenInfo::DispatchContent(nsIRequest *request, nsISupports * aCtxt)
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{
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LOG(("[0x%p] nsDocumentOpenInfo::DispatchContent for type '%s'", this, mContentType.get()));
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NS_PRECONDITION(!m_targetStreamListener,
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"Why do we already have a target stream listener?");
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nsresult rv;
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nsCOMPtr<nsIChannel> aChannel = do_QueryInterface(request);
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if (!aChannel) {
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LOG_ERROR((" Request is not a channel. Bailing."));
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return NS_ERROR_FAILURE;
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}
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NS_NAMED_LITERAL_CSTRING(anyType, "*/*");
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if (mContentType.IsEmpty() || mContentType == anyType) {
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rv = aChannel->GetContentType(mContentType);
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if (NS_FAILED(rv)) return rv;
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LOG((" Got type from channel: '%s'", mContentType.get()));
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}
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PRBool isGuessFromExt =
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mContentType.LowerCaseEqualsASCII(APPLICATION_GUESS_FROM_EXT);
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if (isGuessFromExt) {
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// Reset to application/octet-stream for now; no one other than the
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// external helper app service should see APPLICATION_GUESS_FROM_EXT.
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mContentType = APPLICATION_OCTET_STREAM;
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aChannel->SetContentType(NS_LITERAL_CSTRING(APPLICATION_OCTET_STREAM));
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}
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// Check whether the data should be forced to be handled externally. This
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// could happen because the Content-Disposition header is set so, or, in the
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// future, because the user has specified external handling for the MIME
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// type.
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PRBool forceExternalHandling = PR_FALSE;
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nsCAutoString disposition;
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nsCOMPtr<nsIHttpChannel> httpChannel(do_QueryInterface(request));
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nsCOMPtr<nsIURI> uri;
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if (httpChannel)
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{
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rv = httpChannel->GetResponseHeader(NS_LITERAL_CSTRING("content-disposition"),
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disposition);
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httpChannel->GetURI(getter_AddRefs(uri));
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}
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else
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{
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nsCOMPtr<nsIMultiPartChannel> multipartChannel(do_QueryInterface(request));
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if (multipartChannel)
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{
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rv = multipartChannel->GetContentDisposition(disposition);
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}
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}
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LOG((" Disposition header: '%s'", disposition.get()));
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if (NS_SUCCEEDED(rv) && !disposition.IsEmpty())
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{
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nsCOMPtr<nsIMIMEHeaderParam> mimehdrpar = do_GetService(NS_MIMEHEADERPARAM_CONTRACTID, &rv);
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if (NS_SUCCEEDED(rv))
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{
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nsCAutoString fallbackCharset;
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if (uri)
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uri->GetOriginCharset(fallbackCharset);
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nsAutoString dispToken;
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// Get the disposition type
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rv = mimehdrpar->GetParameter(disposition, "", fallbackCharset,
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PR_TRUE, nsnull, dispToken);
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// RFC 2183, section 2.8 says that an unknown disposition
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// value should be treated as "attachment"
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// XXXbz this code is duplicated in GetFilenameAndExtensionFromChannel in
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// nsExternalHelperAppService. Factor it out!
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if (NS_FAILED(rv) ||
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(// Some broken sites just send
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// Content-Disposition: ; filename="file"
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// screen those out here.
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!dispToken.IsEmpty() &&
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!dispToken.LowerCaseEqualsLiteral("inline") &&
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// Broken sites just send
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// Content-Disposition: filename="file"
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// without a disposition token... screen those out.
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!dispToken.EqualsIgnoreCase("filename", 8)) &&
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// Also in use is Content-Disposition: name="file"
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!dispToken.EqualsIgnoreCase("name", 4))
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// We have a content-disposition of "attachment" or unknown
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forceExternalHandling = PR_TRUE;
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}
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}
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LOG((" forceExternalHandling: %s", forceExternalHandling ? "yes" : "no"));
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// We're going to try to find a contentListener that can handle our data
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nsCOMPtr<nsIURIContentListener> contentListener;
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// The type or data the contentListener wants.
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nsXPIDLCString desiredContentType;
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if (!forceExternalHandling)
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{
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//
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// First step: See whether m_contentListener wants to handle this
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// content type.
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//
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if (m_contentListener && TryContentListener(m_contentListener, aChannel)) {
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LOG((" Success! Our default listener likes this type"));
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// All done here
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return NS_OK;
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}
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// If we aren't allowed to try other listeners, we're done here.
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if (!(mFlags & nsIURILoader::DONT_RETARGET)) {
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//
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// Second step: See whether some other registered listener wants
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// to handle this content type.
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//
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PRInt32 count = mURILoader->m_listeners.Count();
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nsCOMPtr<nsIURIContentListener> listener;
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for (PRInt32 i = 0; i < count; i++) {
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listener = do_QueryReferent(mURILoader->m_listeners[i]);
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if (listener) {
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if (TryContentListener(listener, aChannel)) {
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LOG((" Found listener registered on the URILoader"));
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return NS_OK;
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}
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} else {
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// remove from the listener list, reset i and update count
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mURILoader->m_listeners.RemoveObjectAt(i--);
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--count;
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}
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}
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//
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// Third step: Try to find a content listener that has not yet had
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// the chance to register, as it is contained in a not-yet-loaded
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// module, but which has registered a contract ID.
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//
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nsCOMPtr<nsICategoryManager> catman =
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do_GetService(NS_CATEGORYMANAGER_CONTRACTID);
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if (catman) {
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nsXPIDLCString contractidString;
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rv = catman->GetCategoryEntry(NS_CONTENT_LISTENER_CATEGORYMANAGER_ENTRY,
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mContentType.get(),
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getter_Copies(contractidString));
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if (NS_SUCCEEDED(rv) && !contractidString.IsEmpty()) {
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LOG((" Listener contractid for '%s' is '%s'",
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mContentType.get(), contractidString.get()));
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listener = do_CreateInstance(contractidString);
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LOG((" Listener from category manager: 0x%p", listener.get()));
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if (listener && TryContentListener(listener, aChannel)) {
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LOG((" Listener from category manager likes this type"));
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return NS_OK;
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}
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}
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}
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//
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// Fourth step: try to find an nsIContentHandler for our type.
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//
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nsCAutoString handlerContractID (NS_CONTENT_HANDLER_CONTRACTID_PREFIX);
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handlerContractID += mContentType;
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nsCOMPtr<nsIContentHandler> contentHandler =
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do_CreateInstance(handlerContractID.get());
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if (contentHandler) {
|
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LOG((" Content handler found"));
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rv = contentHandler->HandleContent(mContentType.get(),
|
|
m_originalContext, request);
|
|
// XXXbz returning an error code to represent handling the
|
|
// content is just bizarre!
|
|
if (rv != NS_ERROR_WONT_HANDLE_CONTENT) {
|
|
if (NS_FAILED(rv)) {
|
|
// The content handler has unexpectedly failed. Cancel the request
|
|
// just in case the handler didn't...
|
|
LOG((" Content handler failed. Aborting load"));
|
|
request->Cancel(rv);
|
|
}
|
|
#ifdef PR_LOGGING
|
|
else {
|
|
LOG((" Content handler taking over load"));
|
|
}
|
|
#endif
|
|
|
|
return rv;
|
|
}
|
|
}
|
|
}
|
|
} else if (mFlags & nsIURILoader::DONT_RETARGET) {
|
|
// External handling was forced, but we must not retarget
|
|
// -> abort
|
|
LOG((" External handling forced, but not allowed to retarget -> aborting"));
|
|
return NS_ERROR_WONT_HANDLE_CONTENT;
|
|
}
|
|
|
|
NS_ASSERTION(!m_targetStreamListener,
|
|
"If we found a listener, why are we not using it?");
|
|
|
|
//
|
|
// Fifth step: If no listener prefers this type, see if any stream
|
|
// converters exist to transform this content type into
|
|
// some other.
|
|
//
|
|
|
|
// We always want to do this, since even content being forced to
|
|
// be handled externally may need decoding (eg via the unknown
|
|
// content decoder).
|
|
// Don't do this if the server sent us a MIME type of "*/*" because they saw
|
|
// it in our Accept header and got confused.
|
|
// XXXbz have to be careful here; may end up in some sort of bizarre infinite
|
|
// decoding loop.
|
|
if (mContentType != anyType) {
|
|
rv = ConvertData(request, m_contentListener, mContentType, anyType);
|
|
if (NS_FAILED(rv)) {
|
|
m_targetStreamListener = nsnull;
|
|
} else if (m_targetStreamListener) {
|
|
// We found a converter for this MIME type. We'll just pump data into it
|
|
// and let the downstream nsDocumentOpenInfo handle things.
|
|
LOG((" Converter taking over now"));
|
|
return NS_OK;
|
|
}
|
|
}
|
|
|
|
if (mFlags & nsIURILoader::DONT_RETARGET) {
|
|
LOG((" Listener not interested and no stream converter exists, and retargeting disallowed -> aborting"));
|
|
return NS_ERROR_WONT_HANDLE_CONTENT;
|
|
}
|
|
|
|
// Before dispatching to the external helper app service, check for an HTTP
|
|
// error page. If we got one, we don't want to handle it with a helper app,
|
|
// really.
|
|
if (httpChannel) {
|
|
PRBool requestSucceeded;
|
|
httpChannel->GetRequestSucceeded(&requestSucceeded);
|
|
if (!requestSucceeded) {
|
|
// returning error from OnStartRequest will cancel the channel
|
|
return NS_ERROR_FILE_NOT_FOUND;
|
|
}
|
|
}
|
|
|
|
// Sixth step:
|
|
//
|
|
// All attempts to dispatch this content have failed. Just pass it off to
|
|
// the helper app service.
|
|
//
|
|
nsCOMPtr<nsIExternalHelperAppService> helperAppService =
|
|
do_GetService(NS_EXTERNALHELPERAPPSERVICE_CONTRACTID, &rv);
|
|
if (helperAppService) {
|
|
LOG((" Passing load off to helper app service"));
|
|
|
|
// Set these flags to indicate that the channel has been targeted and that
|
|
// we are not using the original consumer.
|
|
nsLoadFlags loadFlags = 0;
|
|
request->GetLoadFlags(&loadFlags);
|
|
request->SetLoadFlags(loadFlags | nsIChannel::LOAD_RETARGETED_DOCUMENT_URI
|
|
| nsIChannel::LOAD_TARGETED);
|
|
|
|
if (isGuessFromExt) {
|
|
mContentType = APPLICATION_GUESS_FROM_EXT;
|
|
aChannel->SetContentType(NS_LITERAL_CSTRING(APPLICATION_GUESS_FROM_EXT));
|
|
}
|
|
|
|
rv = helperAppService->DoContent(mContentType,
|
|
request,
|
|
m_originalContext,
|
|
getter_AddRefs(m_targetStreamListener));
|
|
if (NS_FAILED(rv)) {
|
|
request->SetLoadFlags(loadFlags);
|
|
m_targetStreamListener = nsnull;
|
|
}
|
|
}
|
|
|
|
NS_ASSERTION(m_targetStreamListener || NS_FAILED(rv),
|
|
"There is no way we should be successful at this point without a m_targetStreamListener");
|
|
return rv;
|
|
}
|
|
|
|
nsresult
|
|
nsDocumentOpenInfo::ConvertData(nsIRequest *request,
|
|
nsIURIContentListener* aListener,
|
|
const nsACString& aSrcContentType,
|
|
const nsACString& aOutContentType)
|
|
{
|
|
LOG(("[0x%p] nsDocumentOpenInfo::ConvertData from '%s' to '%s'", this,
|
|
PromiseFlatCString(aSrcContentType).get(),
|
|
PromiseFlatCString(aOutContentType).get()));
|
|
|
|
NS_PRECONDITION(aSrcContentType != aOutContentType,
|
|
"ConvertData called when the two types are the same!");
|
|
nsresult rv = NS_OK;
|
|
|
|
nsCOMPtr<nsIStreamConverterService> StreamConvService =
|
|
do_GetService(NS_STREAMCONVERTERSERVICE_CONTRACTID, &rv);
|
|
if (NS_FAILED(rv)) return rv;
|
|
|
|
LOG((" Got converter service"));
|
|
|
|
// When applying stream decoders, it is necessary to "insert" an
|
|
// intermediate nsDocumentOpenInfo instance to handle the targeting of
|
|
// the "final" stream or streams.
|
|
//
|
|
// For certain content types (ie. multi-part/x-mixed-replace) the input
|
|
// stream is split up into multiple destination streams. This
|
|
// intermediate instance is used to target these "decoded" streams...
|
|
//
|
|
nsCOMPtr<nsDocumentOpenInfo> nextLink =
|
|
new nsDocumentOpenInfo(m_originalContext, mFlags, mURILoader);
|
|
if (!nextLink) return NS_ERROR_OUT_OF_MEMORY;
|
|
|
|
LOG((" Downstream DocumentOpenInfo would be: 0x%p", nextLink.get()));
|
|
|
|
// Make sure nextLink starts with the contentListener that said it wanted the
|
|
// results of this decode.
|
|
nextLink->m_contentListener = aListener;
|
|
// Also make sure it has to look for a stream listener to pump data into.
|
|
nextLink->m_targetStreamListener = nsnull;
|
|
|
|
// Make sure that nextLink treats the data as aOutContentType when
|
|
// dispatching; that way even if the stream converters don't change the type
|
|
// on the channel we will still do the right thing. If aOutContentType is
|
|
// */*, that's OK -- that will just indicate to nextLink that it should get
|
|
// the type off the channel.
|
|
nextLink->mContentType = aOutContentType;
|
|
|
|
// The following call sets m_targetStreamListener to the input end of the
|
|
// stream converter and sets the output end of the stream converter to
|
|
// nextLink. As we pump data into m_targetStreamListener the stream
|
|
// converter will convert it and pass the converted data to nextLink.
|
|
return StreamConvService->AsyncConvertData(PromiseFlatCString(aSrcContentType).get(),
|
|
PromiseFlatCString(aOutContentType).get(),
|
|
nextLink,
|
|
request,
|
|
getter_AddRefs(m_targetStreamListener));
|
|
}
|
|
|
|
PRBool
|
|
nsDocumentOpenInfo::TryContentListener(nsIURIContentListener* aListener,
|
|
nsIChannel* aChannel)
|
|
{
|
|
LOG(("[0x%p] nsDocumentOpenInfo::TryContentListener; mFlags = 0x%x",
|
|
this, mFlags));
|
|
|
|
NS_PRECONDITION(aListener, "Must have a non-null listener");
|
|
NS_PRECONDITION(aChannel, "Must have a channel");
|
|
|
|
PRBool listenerWantsContent = PR_FALSE;
|
|
nsXPIDLCString typeToUse;
|
|
|
|
if (mFlags & nsIURILoader::IS_CONTENT_PREFERRED) {
|
|
aListener->IsPreferred(mContentType.get(),
|
|
getter_Copies(typeToUse),
|
|
&listenerWantsContent);
|
|
} else {
|
|
aListener->CanHandleContent(mContentType.get(), PR_FALSE,
|
|
getter_Copies(typeToUse),
|
|
&listenerWantsContent);
|
|
}
|
|
if (!listenerWantsContent) {
|
|
LOG((" Listener is not interested"));
|
|
return PR_FALSE;
|
|
}
|
|
|
|
if (!typeToUse.IsEmpty() && typeToUse != mContentType) {
|
|
// Need to do a conversion here.
|
|
|
|
nsresult rv = ConvertData(aChannel, aListener, mContentType, typeToUse);
|
|
|
|
if (NS_FAILED(rv)) {
|
|
// No conversion path -- we don't want this listener, if we got one
|
|
m_targetStreamListener = nsnull;
|
|
}
|
|
|
|
LOG((" Found conversion: %s", m_targetStreamListener ? "yes" : "no"));
|
|
|
|
// m_targetStreamListener is now the input end of the converter, and we can
|
|
// just pump the data in there, if it exists. If it does not, we need to
|
|
// try other nsIURIContentListeners.
|
|
return m_targetStreamListener != nsnull;
|
|
}
|
|
|
|
// At this point, aListener wants data of type mContentType. Let 'em have
|
|
// it. But first, if we are retargeting, set an appropriate flag on the
|
|
// channel
|
|
nsLoadFlags loadFlags = 0;
|
|
aChannel->GetLoadFlags(&loadFlags);
|
|
|
|
// Set this flag to indicate that the channel has been targeted at a final
|
|
// consumer. This load flag is tested in nsDocLoader::OnProgress.
|
|
nsLoadFlags newLoadFlags = nsIChannel::LOAD_TARGETED;
|
|
|
|
nsCOMPtr<nsIURIContentListener> originalListener =
|
|
do_GetInterface(m_originalContext);
|
|
if (originalListener != aListener) {
|
|
newLoadFlags |= nsIChannel::LOAD_RETARGETED_DOCUMENT_URI;
|
|
}
|
|
aChannel->SetLoadFlags(loadFlags | newLoadFlags);
|
|
|
|
PRBool abort = PR_FALSE;
|
|
PRBool isPreferred = (mFlags & nsIURILoader::IS_CONTENT_PREFERRED) != 0;
|
|
nsresult rv = aListener->DoContent(mContentType.get(),
|
|
isPreferred,
|
|
aChannel,
|
|
getter_AddRefs(m_targetStreamListener),
|
|
&abort);
|
|
|
|
if (NS_FAILED(rv)) {
|
|
LOG_ERROR((" DoContent failed"));
|
|
|
|
// Unset the RETARGETED_DOCUMENT_URI flag if we set it...
|
|
aChannel->SetLoadFlags(loadFlags);
|
|
m_targetStreamListener = nsnull;
|
|
return PR_FALSE;
|
|
}
|
|
|
|
if (abort) {
|
|
// Nothing else to do here -- aListener is handling it all. Make
|
|
// sure m_targetStreamListener is null so we don't do anything
|
|
// after this point.
|
|
LOG((" Listener has aborted the load"));
|
|
m_targetStreamListener = nsnull;
|
|
}
|
|
|
|
NS_ASSERTION(abort || m_targetStreamListener, "DoContent returned no listener?");
|
|
|
|
// aListener is handling the load from this point on.
|
|
return PR_TRUE;
|
|
}
|
|
|
|
|
|
///////////////////////////////////////////////////////////////////////////////////////////////
|
|
// Implementation of nsURILoader
|
|
///////////////////////////////////////////////////////////////////////////////////////////////
|
|
|
|
nsURILoader::nsURILoader()
|
|
{
|
|
#ifdef PR_LOGGING
|
|
if (!mLog) {
|
|
mLog = PR_NewLogModule("URILoader");
|
|
}
|
|
#endif
|
|
}
|
|
|
|
nsURILoader::~nsURILoader()
|
|
{
|
|
}
|
|
|
|
NS_IMPL_ADDREF(nsURILoader)
|
|
NS_IMPL_RELEASE(nsURILoader)
|
|
|
|
NS_INTERFACE_MAP_BEGIN(nsURILoader)
|
|
NS_INTERFACE_MAP_ENTRY_AMBIGUOUS(nsISupports, nsIURILoader)
|
|
NS_INTERFACE_MAP_ENTRY(nsIURILoader)
|
|
NS_INTERFACE_MAP_END
|
|
|
|
NS_IMETHODIMP nsURILoader::RegisterContentListener(nsIURIContentListener * aContentListener)
|
|
{
|
|
nsresult rv = NS_OK;
|
|
|
|
nsWeakPtr weakListener = do_GetWeakReference(aContentListener);
|
|
NS_ASSERTION(weakListener, "your URIContentListener must support weak refs!\n");
|
|
|
|
if (weakListener)
|
|
m_listeners.AppendObject(weakListener);
|
|
|
|
return rv;
|
|
}
|
|
|
|
NS_IMETHODIMP nsURILoader::UnRegisterContentListener(nsIURIContentListener * aContentListener)
|
|
{
|
|
nsWeakPtr weakListener = do_GetWeakReference(aContentListener);
|
|
if (weakListener)
|
|
m_listeners.RemoveObject(weakListener);
|
|
|
|
return NS_OK;
|
|
|
|
}
|
|
|
|
NS_IMETHODIMP nsURILoader::OpenURI(nsIChannel *channel,
|
|
PRBool aIsContentPreferred,
|
|
nsIInterfaceRequestor *aWindowContext)
|
|
{
|
|
NS_ENSURE_ARG_POINTER(channel);
|
|
|
|
#ifdef PR_LOGGING
|
|
if (LOG_ENABLED()) {
|
|
nsCOMPtr<nsIURI> uri;
|
|
channel->GetURI(getter_AddRefs(uri));
|
|
nsCAutoString spec;
|
|
uri->GetAsciiSpec(spec);
|
|
LOG(("nsURILoader::OpenURI for %s", spec.get()));
|
|
}
|
|
#endif
|
|
|
|
nsCOMPtr<nsIStreamListener> loader;
|
|
nsresult rv = OpenChannel(channel,
|
|
aIsContentPreferred ? IS_CONTENT_PREFERRED : 0,
|
|
aWindowContext,
|
|
PR_FALSE,
|
|
getter_AddRefs(loader));
|
|
|
|
if (NS_SUCCEEDED(rv)) {
|
|
// this method is not complete!!! Eventually, we should first go
|
|
// to the content listener and ask them for a protocol handler...
|
|
// if they don't give us one, we need to go to the registry and get
|
|
// the preferred protocol handler.
|
|
|
|
// But for now, I'm going to let necko do the work for us....
|
|
rv = channel->AsyncOpen(loader, nsnull);
|
|
|
|
// no content from this load - that's OK.
|
|
if (rv == NS_ERROR_NO_CONTENT) {
|
|
LOG((" rv is NS_ERROR_NO_CONTENT -- doing nothing"));
|
|
rv = NS_OK;
|
|
}
|
|
} else if (rv == NS_ERROR_WONT_HANDLE_CONTENT) {
|
|
// Not really an error, from this method's point of view
|
|
rv = NS_OK;
|
|
}
|
|
return rv;
|
|
}
|
|
|
|
nsresult nsURILoader::OpenChannel(nsIChannel* channel,
|
|
PRUint32 aFlags,
|
|
nsIInterfaceRequestor* aWindowContext,
|
|
PRBool aChannelIsOpen,
|
|
nsIStreamListener** aListener)
|
|
{
|
|
NS_ASSERTION(channel, "Trying to open a null channel!");
|
|
NS_ASSERTION(aWindowContext, "Window context must not be null");
|
|
|
|
#ifdef PR_LOGGING
|
|
if (LOG_ENABLED()) {
|
|
nsCOMPtr<nsIURI> uri;
|
|
channel->GetURI(getter_AddRefs(uri));
|
|
nsCAutoString spec;
|
|
uri->GetAsciiSpec(spec);
|
|
LOG(("nsURILoader::OpenChannel for %s", spec.get()));
|
|
}
|
|
#endif
|
|
|
|
// Let the window context's uriListener know that the open is starting. This
|
|
// gives that window a chance to abort the load process.
|
|
nsCOMPtr<nsIURIContentListener> winContextListener(do_GetInterface(aWindowContext));
|
|
if (winContextListener) {
|
|
nsCOMPtr<nsIURI> uri;
|
|
channel->GetURI(getter_AddRefs(uri));
|
|
if (uri) {
|
|
PRBool doAbort = PR_FALSE;
|
|
winContextListener->OnStartURIOpen(uri, &doAbort);
|
|
|
|
if (doAbort) {
|
|
LOG((" OnStartURIOpen aborted load"));
|
|
return NS_ERROR_WONT_HANDLE_CONTENT;
|
|
}
|
|
}
|
|
}
|
|
|
|
// we need to create a DocumentOpenInfo object which will go ahead and open
|
|
// the url and discover the content type....
|
|
nsCOMPtr<nsDocumentOpenInfo> loader =
|
|
new nsDocumentOpenInfo(aWindowContext, aFlags, this);
|
|
|
|
if (!loader) return NS_ERROR_OUT_OF_MEMORY;
|
|
|
|
// Set the correct loadgroup on the channel
|
|
nsCOMPtr<nsILoadGroup> loadGroup(do_GetInterface(aWindowContext));
|
|
|
|
if (!loadGroup) {
|
|
// XXXbz This context is violating what we'd like to be the new uriloader
|
|
// api.... Set up a nsDocLoader to handle the loadgroup for this context.
|
|
// This really needs to go away!
|
|
nsCOMPtr<nsIURIContentListener> listener(do_GetInterface(aWindowContext));
|
|
if (listener) {
|
|
nsCOMPtr<nsISupports> cookie;
|
|
listener->GetLoadCookie(getter_AddRefs(cookie));
|
|
if (!cookie) {
|
|
nsRefPtr<nsDocLoader> newDocLoader = new nsDocLoader();
|
|
if (!newDocLoader)
|
|
return NS_ERROR_OUT_OF_MEMORY;
|
|
nsresult rv = newDocLoader->Init();
|
|
if (NS_FAILED(rv))
|
|
return rv;
|
|
rv = nsDocLoader::AddDocLoaderAsChildOfRoot(newDocLoader);
|
|
if (NS_FAILED(rv))
|
|
return rv;
|
|
cookie = nsDocLoader::GetAsSupports(newDocLoader);
|
|
listener->SetLoadCookie(cookie);
|
|
}
|
|
loadGroup = do_GetInterface(cookie);
|
|
}
|
|
}
|
|
|
|
// If the channel is pending, then we need to remove it from its current
|
|
// loadgroup
|
|
nsCOMPtr<nsILoadGroup> oldGroup;
|
|
channel->GetLoadGroup(getter_AddRefs(oldGroup));
|
|
if (aChannelIsOpen && !SameCOMIdentity(oldGroup, loadGroup)) {
|
|
// It is important to add the channel to the new group before
|
|
// removing it from the old one, so that the load isn't considered
|
|
// done as soon as the request is removed.
|
|
loadGroup->AddRequest(channel, nsnull);
|
|
|
|
if (oldGroup) {
|
|
oldGroup->RemoveRequest(channel, nsnull, NS_BINDING_RETARGETED);
|
|
}
|
|
}
|
|
|
|
channel->SetLoadGroup(loadGroup);
|
|
|
|
// prepare the loader for receiving data
|
|
nsresult rv = loader->Prepare();
|
|
if (NS_SUCCEEDED(rv))
|
|
NS_ADDREF(*aListener = loader);
|
|
return rv;
|
|
}
|
|
|
|
NS_IMETHODIMP nsURILoader::OpenChannel(nsIChannel* channel,
|
|
PRUint32 aFlags,
|
|
nsIInterfaceRequestor* aWindowContext,
|
|
nsIStreamListener** aListener)
|
|
{
|
|
PRBool pending;
|
|
if (NS_FAILED(channel->IsPending(&pending))) {
|
|
pending = PR_FALSE;
|
|
}
|
|
|
|
return OpenChannel(channel, aFlags, aWindowContext, pending, aListener);
|
|
}
|
|
|
|
NS_IMETHODIMP nsURILoader::Stop(nsISupports* aLoadCookie)
|
|
{
|
|
nsresult rv;
|
|
nsCOMPtr<nsIDocumentLoader> docLoader;
|
|
|
|
NS_ENSURE_ARG_POINTER(aLoadCookie);
|
|
|
|
docLoader = do_GetInterface(aLoadCookie, &rv);
|
|
if (docLoader) {
|
|
rv = docLoader->Stop();
|
|
}
|
|
return rv;
|
|
}
|
|
|