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pjs/uriloader/base/nsDocLoader.cpp

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/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*-
*
* The contents of this file are subject to the Netscape Public License
* Version 1.0 (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/NPL/
*
* 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 Communicator client code.
*
* The Initial Developer of the Original Code is Netscape Communications
* Corporation. Portions created by Netscape are Copyright (C) 1998
* Netscape Communications Corporation. All Rights Reserved.
*/
#include "nsIDocumentLoader.h"
#include "nsIWebShell.h"
#include "prmem.h"
#include "plstr.h"
#include "nsString.h"
#include "nsISupportsArray.h"
#include "nsIURL.h"
#include "nsIStreamListener.h"
#include "nsIFactory.h"
#include "nsIContentViewerContainer.h"
#include "nsIContentViewer.h"
#include "nsITimer.h"
#include "nsIDocumentLoaderObserver.h"
#include "nsVoidArray.h"
#include "nsIServiceManager.h"
#include "nsXPIDLString.h"
#include "nsILoadGroup.h"
//#include "nsILoadGroupObserver.h"
#include "nsNeckoUtil.h"
#include "nsIURL.h"
#include "nsIDNSService.h"
#include "nsIChannel.h"
#include "nsIHTTPChannel.h"
#include "nsHTTPEnums.h"
#include "nsIProgressEventSink.h"
#include "nsIGenericFactory.h"
#include "nsIStreamLoadableDocument.h"
#include "nsCOMPtr.h"
#include "nsCom.h"
#include "prlog.h"
#include "prprf.h"
#include "nsWeakReference.h"
#include "nsIStreamConverterService.h"
#include "nsIStreamConverter.h"
static NS_DEFINE_CID(kStreamConverterServiceCID, NS_STREAMCONVERTERSERVICE_CID);
#include <iostream.h>
// XXX ick ick ick
#include "nsIDocument.h"
#include "nsIPresShell.h"
#include "nsIPresContext.h"
#ifdef DEBUG
#undef NOISY_CREATE_DOC
#else
#undef NOISY_CREATE_DOC
#endif
#if defined(DEBUG) || defined(FORCE_PR_LOG)
PRLogModuleInfo* gDocLoaderLog = nsnull;
#endif /* DEBUG || FORCE_PR_LOG */
/* Private IIDs... */
/* eb001fa0-214f-11d2-bec0-00805f8a66dc */
#define NS_DOCUMENTBINDINFO_IID \
{ 0xeb001fa0, 0x214f, 0x11d2, \
{0xbe, 0xc0, 0x00, 0x80, 0x5f, 0x8a, 0x66, 0xdc} }
/* Define IIDs... */
static NS_DEFINE_IID(kIStreamObserverIID, NS_ISTREAMOBSERVER_IID);
static NS_DEFINE_IID(kIDocumentLoaderIID, NS_IDOCUMENTLOADER_IID);
static NS_DEFINE_IID(kIDocumentLoaderFactoryIID, NS_IDOCUMENTLOADERFACTORY_IID);
static NS_DEFINE_IID(kDocumentBindInfoIID, NS_DOCUMENTBINDINFO_IID);
static NS_DEFINE_IID(kISupportsIID, NS_ISUPPORTS_IID);
static NS_DEFINE_IID(kIDocumentIID, NS_IDOCUMENT_IID);
static NS_DEFINE_IID(kIStreamListenerIID, NS_ISTREAMLISTENER_IID);
static NS_DEFINE_IID(kIContentViewerContainerIID, NS_ICONTENT_VIEWER_CONTAINER_IID);
static NS_DEFINE_CID(kGenericFactoryCID, NS_GENERICFACTORY_CID);
/* Forward declarations.... */
class nsDocLoaderImpl;
class nsChannelListener : public nsIStreamListener
{
public:
nsChannelListener();
nsresult Init(nsDocLoaderImpl *aDocLoader, nsIStreamListener *aListener);
NS_DECL_ISUPPORTS
NS_DECL_NSISTREAMOBSERVER
NS_DECL_NSISTREAMLISTENER
protected:
virtual ~nsChannelListener();
nsDocLoaderImpl *mDocLoader;
nsCOMPtr<nsIStreamListener> mNextListener;
};
/*
* The nsDocumentBindInfo contains the state required when a single document
* is being loaded... Each instance remains alive until its target URL has
* been loaded (or aborted).
*
* The Document Loader maintains a list of nsDocumentBindInfo instances which
* represents the set of documents actively being loaded...
*/
class nsDocumentBindInfo : public nsIStreamListener
{
public:
nsDocumentBindInfo();
nsresult Init(nsDocLoaderImpl* aDocLoader,
const char *aCommand,
nsIContentViewerContainer* aContainer,
nsISupports* aExtraInfo);
NS_DECL_ISUPPORTS
nsresult Bind(nsIURI *aURL,
nsILoadGroup* aLoadGroup,
nsIInputStream *postDataStream,
const PRUnichar* aReferrer=nsnull);
// nsIStreamObserver methods:
NS_DECL_NSISTREAMOBSERVER
// nsIStreamListener methods:
NS_DECL_NSISTREAMLISTENER
protected:
virtual ~nsDocumentBindInfo();
protected:
char* m_Command;
nsIContentViewerContainer* m_Container;
nsISupports* m_ExtraInfo;
nsIStreamListener* m_NextStream;
nsDocLoaderImpl* m_DocLoader;
};
/****************************************************************************
* nsDocLoaderImpl implementation...
****************************************************************************/
class nsDocLoaderImpl : public nsIDocumentLoader,
public nsIStreamObserver,
public nsILoadGroupListenerFactory,
public nsSupportsWeakReference
{
public:
nsDocLoaderImpl();
nsresult Init();
// for nsIGenericFactory:
static NS_IMETHODIMP Create(nsISupports *aOuter, const nsIID &aIID, void **aResult);
NS_DECL_ISUPPORTS
// nsIDocumentLoader interface
NS_IMETHOD LoadDocument(nsIURI * aUri,
const char *aCommand,
nsIContentViewerContainer* aContainer,
nsIInputStream* aPostDataStream = nsnull,
nsISupports* aExtraInfo = nsnull,
nsLoadFlags aType = nsIChannel::LOAD_NORMAL,
const PRUint32 aLocalIP = 0,
const PRUnichar* aReferrer = nsnull);
NS_IMETHOD LoadSubDocument(nsIURI * aUri,
nsISupports* aExtraInfo = nsnull,
nsLoadFlags aType = nsIChannel::LOAD_NORMAL,
const PRUint32 aLocalIP = 0);
NS_IMETHOD Stop(void);
NS_IMETHOD IsBusy(PRBool& aResult);
NS_IMETHOD CreateDocumentLoader(nsIDocumentLoader** anInstance);
NS_IMETHOD AddObserver(nsIDocumentLoaderObserver *aObserver);
NS_IMETHOD RemoveObserver(nsIDocumentLoaderObserver *aObserver);
NS_IMETHOD SetContainer(nsIContentViewerContainer* aContainer);
NS_IMETHOD GetContainer(nsIContentViewerContainer** aResult);
NS_IMETHOD GetContentViewerContainer(PRUint32 aDocumentID,
nsIContentViewerContainer** aResult);
NS_IMETHOD Destroy();
// nsILoadGroupListenerFactory methods...
NS_IMETHOD CreateLoadGroupListener(nsIStreamListener *aListener,
nsIStreamListener **aResult);
// nsIStreamObserver methods: (for observing the load group)
NS_DECL_NSISTREAMOBSERVER
// Implementation specific methods...
nsresult AddChildGroup(nsDocLoaderImpl *aLoader);
nsresult RemoveChildGroup(nsDocLoaderImpl *aLoader);
void FireOnStartDocumentLoad(nsDocLoaderImpl* aLoadInitiator,
nsIURI* aURL,
const char* aCommand);
void FireOnEndDocumentLoad(nsDocLoaderImpl* aLoadInitiator,
nsIChannel *aDocChannel,
nsresult aStatus);
void FireOnStartURLLoad(nsDocLoaderImpl* aLoadInitiator,
nsIChannel* channel,
nsIContentViewer* aViewer);
void FireOnEndURLLoad(nsDocLoaderImpl* aLoadInitiator,
nsIChannel* channel, nsresult aStatus);
void SetParent(nsDocLoaderImpl* aParent);
void SetDocumentChannel(nsIChannel* channel);
nsILoadGroup* GetLoadGroup() { return mLoadGroup; }
PRBool IsLoadingDocument() { return mIsLoadingDocument; }
nsresult CreateContentViewer(const char *aCommand,
nsIChannel* channel,
const char* aContentType,
nsIContentViewerContainer* aContainer,
nsISupports* aExtraInfo,
nsIStreamListener** aDocListener,
nsIContentViewer** aDocViewer);
protected:
virtual ~nsDocLoaderImpl();
protected:
static PRBool IsBusyEnumerator(nsISupports* aElement, void* aData);
// IMPORTANT: The ownership implicit in the following member
// variables has been explicitly checked and set using nsCOMPtr
// for owning pointers and raw COM interface pointers for weak
// (ie, non owning) references. If you add any members to this
// class, please make the ownership explicit (pinkerton, scc).
nsCOMPtr<nsIChannel> mDocumentChannel; // [OWNER] ???compare with document
nsVoidArray mDocObservers;
nsIContentViewerContainer* mContainer; // [WEAK] it owns me!
nsDocLoaderImpl* mParent; // [OWNER] but upside down ownership model
// needs to be fixed***
/*
* This flag indicates that the loader is loading a document. It is set
* from the call to LoadDocument(...) until the OnConnectionsComplete(...)
* notification is fired...
*/
PRBool mIsLoadingDocument;
nsCOMPtr<nsILoadGroup> mLoadGroup;
nsCOMPtr<nsISupportsArray> mChildList;
};
nsDocLoaderImpl::nsDocLoaderImpl()
{
NS_INIT_REFCNT();
#if defined(DEBUG) || defined(FORCE_PR_LOG)
if (nsnull == gDocLoaderLog) {
gDocLoaderLog = PR_NewLogModule("DocLoader");
}
#endif /* DEBUG || FORCE_PR_LOG */
mContainer = nsnull;
mParent = nsnull;
mIsLoadingDocument = PR_FALSE;
PR_LOG(gDocLoaderLog, PR_LOG_DEBUG,
("DocLoader:%p: created.\n", this));
}
nsresult
nsDocLoaderImpl::Init()
{
nsresult rv;
rv = NS_NewLoadGroup(nsnull, this, nsnull, getter_AddRefs(mLoadGroup));
if (NS_FAILED(rv)) return rv;
PR_LOG(gDocLoaderLog, PR_LOG_DEBUG,
("DocLoader:%p: load group %x.\n", this, mLoadGroup.get()));
rv = mLoadGroup->SetGroupListenerFactory(this);
if (NS_FAILED(rv)) return rv;
rv = NS_NewISupportsArray(getter_AddRefs(mChildList));
return rv;
}
nsDocLoaderImpl::~nsDocLoaderImpl()
{
/*
|ClearWeakReferences()| here is intended to prevent people holding weak references
from re-entering this destructor since |QueryReferent()| will |AddRef()| me, and the
subsequent |Release()| will try to destroy me. At this point there should be only
weak references remaining (otherwise, we wouldn't be getting destroyed).
An alternative would be incrementing our refcount (consider it a compressed flag
saying "Don't re-destroy."). I haven't yet decided which is better. [scc]
*/
ClearWeakReferences();
Destroy();
PR_LOG(gDocLoaderLog, PR_LOG_DEBUG,
("DocLoader:%p: deleted.\n", this));
#ifdef DEBUG
PRUint32 count=0;
mChildList->Count(&count);
NS_PRECONDITION((0 == count), "Document loader has children...");
#endif
}
/*
* Implementation of ISupports methods...
*/
NS_IMPL_ADDREF(nsDocLoaderImpl);
NS_IMPL_RELEASE(nsDocLoaderImpl);
NS_IMETHODIMP
nsDocLoaderImpl::QueryInterface(REFNSIID aIID, void** aInstancePtr)
{
if (NULL == aInstancePtr) {
return NS_ERROR_NULL_POINTER;
}
if (aIID.Equals(kIDocumentLoaderIID)) {
*aInstancePtr = (void*)(nsIDocumentLoader*)this;
NS_ADDREF_THIS();
return NS_OK;
}
if (aIID.Equals(nsCOMTypeInfo<nsILoadGroupListenerFactory>::GetIID())) {
*aInstancePtr = (void*)(nsILoadGroupListenerFactory*)this;
NS_ADDREF_THIS();
return NS_OK;
}
if (aIID.Equals(kIStreamObserverIID)) {
*aInstancePtr = (void*)(nsIStreamObserver*)this;
NS_ADDREF_THIS();
return NS_OK;
}
if (aIID.Equals(nsCOMTypeInfo<nsISupportsWeakReference>::GetIID())) {
*aInstancePtr = NS_STATIC_CAST(nsISupportsWeakReference*,this);
NS_ADDREF_THIS();
return NS_OK;
}
return NS_NOINTERFACE;
}
NS_IMETHODIMP
nsDocLoaderImpl::CreateDocumentLoader(nsIDocumentLoader** anInstance)
{
nsDocLoaderImpl* newLoader = nsnull;
nsresult rv = NS_OK;
/* Check for initial error conditions... */
if (nsnull == anInstance) {
rv = NS_ERROR_NULL_POINTER;
goto done;
}
NS_NEWXPCOM(newLoader, nsDocLoaderImpl);
if (nsnull == newLoader) {
*anInstance = nsnull;
rv = NS_ERROR_OUT_OF_MEMORY;
goto done;
}
rv = newLoader->QueryInterface(kIDocumentLoaderIID, (void**)anInstance);
if (NS_SUCCEEDED(rv)) {
// Initialize now that we have a reference
rv = newLoader->Init();
if (NS_SUCCEEDED(rv)) {
AddChildGroup(newLoader);
newLoader->SetParent(this);
}
}
done:
return rv;
}
nsresult
nsDocLoaderImpl::CreateContentViewer(const char *aCommand,
nsIChannel* channel,
const char* aContentType,
nsIContentViewerContainer* aContainer,
nsISupports* aExtraInfo,
nsIStreamListener** aDocListenerResult,
nsIContentViewer** aDocViewerResult)
{
// Lookup class-id for the command plus content-type combination
nsCID cid;
char id[500];
PR_snprintf(id, sizeof(id),
NS_DOCUMENT_LOADER_FACTORY_PROGID_PREFIX "%s/%s",
aCommand ? aCommand : "view",/* XXX bug! shouldn't b needed!*/
aContentType);
nsresult rv = nsComponentManager::ProgIDToCLSID(id, &cid);
if (NS_FAILED(rv)) {
return rv;
}
// Create an instance of the document-loader-factory object
nsIDocumentLoaderFactory* factory;
rv = nsComponentManager::CreateInstance(cid, (nsISupports *)nsnull,
kIDocumentLoaderFactoryIID,
(void **)&factory);
if (NS_FAILED(rv)) {
return rv;
}
// Now create an instance of the content viewer
rv = factory->CreateInstance(aCommand,
channel, mLoadGroup,
aContentType,
aContainer,
aExtraInfo, aDocListenerResult,
aDocViewerResult);
NS_RELEASE(factory);
return rv;
}
NS_IMETHODIMP
nsDocLoaderImpl::LoadDocument(nsIURI * aUri,
const char* aCommand,
nsIContentViewerContainer* aContainer,
nsIInputStream* aPostDataStream,
nsISupports* aExtraInfo,
nsLoadFlags aType,
const PRUint32 aLocalIP,
const PRUnichar* aReferrer)
{
nsresult rv = NS_OK;
nsDocumentBindInfo* loader = nsnull;
if (!aUri)
return NS_ERROR_NULL_POINTER;
#if defined(DEBUG)
nsXPIDLCString urlSpec;
aUri->GetSpec(getter_Copies(urlSpec));
PR_LOG(gDocLoaderLog, PR_LOG_DEBUG,
("DocLoader:%p: LoadDocument(...) called for %s.",
this, (const char *) urlSpec));
#endif /* DEBUG */
/* Check for initial error conditions... */
if (nsnull == aContainer) {
rv = NS_ERROR_NULL_POINTER;
goto done;
}
NS_NEWXPCOM(loader, nsDocumentBindInfo);
if (nsnull == loader) {
rv = NS_ERROR_OUT_OF_MEMORY;
goto done;
}
NS_ADDREF(loader);
loader->Init(this, // DocLoader
aCommand, // Command
aContainer, // Viewer Container
aExtraInfo); // Extra Info
/*
* Set the flag indicating that the document loader is in the process of
* loading a document. This flag will remain set until the
* OnConnectionsComplete(...) notification is fired for the loader...
*/
mIsLoadingDocument = PR_TRUE;
rv = loader->Bind(aUri, mLoadGroup, aPostDataStream, aReferrer);
done:
NS_RELEASE(loader);
return rv;
}
NS_IMETHODIMP
nsDocLoaderImpl::LoadSubDocument(nsIURI *aUri,
nsISupports* aExtraInfo,
nsLoadFlags aType,
const PRUint32 aLocalIP)
{
nsresult rv;
nsDocumentBindInfo* loader = nsnull;
if (!aUri)
return NS_ERROR_NULL_POINTER;
#ifdef DEBUG
nsXPIDLCString uriSpec;
rv = aUri->GetSpec(getter_Copies(uriSpec));
if (NS_FAILED(rv)) return rv;
PR_LOG(gDocLoaderLog, PR_LOG_DEBUG,
("DocLoader:%p: LoadSubDocument(...) called for %s.",
this, (const char *) uriSpec));
#endif /* DEBUG */
NS_NEWXPCOM(loader, nsDocumentBindInfo);
if (nsnull == loader) {
rv = NS_ERROR_OUT_OF_MEMORY;
return rv;
}
NS_ADDREF(loader);
loader->Init(this, // DocLoader
nsnull, // Command
nsnull, // Viewer Container
aExtraInfo); // Extra Info
rv = loader->Bind(aUri, mLoadGroup, nsnull, nsnull);
NS_RELEASE(loader);
return rv;
}
NS_IMETHODIMP
nsDocLoaderImpl::Stop(void)
{
nsresult rv = NS_OK;
PR_LOG(gDocLoaderLog, PR_LOG_DEBUG,
("DocLoader:%p: Stop() called\n", this));
rv = mLoadGroup->Cancel();
return rv;
}
NS_IMETHODIMP
nsDocLoaderImpl::IsBusy(PRBool& aResult)
{
aResult = PR_FALSE;
/* If this document loader is busy? */
if (mIsLoadingDocument) {
aResult = PR_TRUE;
}
/* Otherwise, check its child document loaders... */
else {
mChildList->EnumerateForwards(nsDocLoaderImpl::IsBusyEnumerator,
(void*)&aResult);
}
return NS_OK;
}
/*
* Do not hold refs to the objects in the observer lists. Observers
* are expected to remove themselves upon their destruction if they
* have not removed themselves previously
*/
NS_IMETHODIMP
nsDocLoaderImpl::AddObserver(nsIDocumentLoaderObserver* aObserver)
{
// Make sure the observer isn't already in the list
if (mDocObservers.IndexOf(aObserver) == -1) {
mDocObservers.AppendElement(aObserver);
}
return NS_OK;
}
NS_IMETHODIMP
nsDocLoaderImpl::RemoveObserver(nsIDocumentLoaderObserver* aObserver)
{
if (PR_TRUE == mDocObservers.RemoveElement(aObserver)) {
return NS_OK;
}
return NS_ERROR_FAILURE;
}
NS_IMETHODIMP
nsDocLoaderImpl::SetContainer(nsIContentViewerContainer* aContainer)
{
// This is a weak reference...
mContainer = aContainer;
return NS_OK;
}
NS_IMETHODIMP
nsDocLoaderImpl::GetContainer(nsIContentViewerContainer** aResult)
{
nsresult rv = NS_OK;
if (nsnull == aResult) {
rv = NS_ERROR_NULL_POINTER;
} else {
*aResult = mContainer;
NS_IF_ADDREF(*aResult);
}
return rv;
}
NS_IMETHODIMP
nsDocLoaderImpl::GetContentViewerContainer(PRUint32 aDocumentID,
nsIContentViewerContainer** aResult)
{
nsISupports* base = (nsISupports*) aDocumentID;
nsIDocument* doc;
nsresult rv;
rv = base->QueryInterface(kIDocumentIID, (void**)&doc);
if (NS_SUCCEEDED(rv)) {
nsIPresShell* pres;
pres = doc->GetShellAt(0);
if (nsnull != pres) {
nsIPresContext* presContext;
rv = pres->GetPresContext(&presContext);
if (NS_SUCCEEDED(rv) && nsnull != presContext) {
nsISupports* supp;
rv = presContext->GetContainer(&supp);
if (NS_SUCCEEDED(rv) && nsnull != supp) {
rv = supp->QueryInterface(kIContentViewerContainerIID, (void**)aResult);
NS_RELEASE(supp);
}
NS_RELEASE(presContext);
}
NS_RELEASE(pres);
}
NS_RELEASE(doc);
}
return rv;
}
NS_IMETHODIMP
nsDocLoaderImpl::Destroy()
{
Stop();
// Remove the document loader from the parent list of loaders...
if (mParent) {
mParent->RemoveChildGroup(this);
NS_RELEASE(mParent);
}
mDocumentChannel = null_nsCOMPtr();
// Clear factory pointer (which is the docloader)
(void)mLoadGroup->SetGroupListenerFactory(nsnull);
return NS_OK;
}
NS_IMETHODIMP
nsDocLoaderImpl::OnStartRequest(nsIChannel *channel, nsISupports *ctxt)
{
// called when the group gets its first element
nsresult rv;
nsCOMPtr<nsIURI> uri;
rv = channel->GetURI(getter_AddRefs(uri));
if (NS_FAILED(rv)) return rv;
//
// Only fire an OnStartDocumentLoad(...) if the document loader
// has initiated a load... Otherwise, this notification has
// resulted from a channel being added to the load group.
//
if (mIsLoadingDocument) {
FireOnStartDocumentLoad(this, uri, "load"); // XXX fix command
}
return NS_OK;
}
NS_IMETHODIMP
nsDocLoaderImpl::OnStopRequest(nsIChannel *channel, nsISupports *ctxt,
nsresult status, const PRUnichar *errorMsg)
{
PR_LOG(gDocLoaderLog, PR_LOG_DEBUG,
("DocLoader:%p: Is now idle...\n", this));
//
// Only fire the OnEndDocumentLoad(...) if the document loader
// has initiated a load...
//
if (mIsLoadingDocument) {
nsCOMPtr<nsIChannel> docChannel(mDocumentChannel);
mDocumentChannel = null_nsCOMPtr();
mIsLoadingDocument = PR_FALSE;
//
// Do nothing after firing the OnEndDocumentLoad(...). The document
// loader may be loading a *new* document - if LoadDocument()
// was called from a handler!
//
FireOnEndDocumentLoad(this, docChannel, status);
}
return NS_OK;
}
nsresult nsDocLoaderImpl::AddChildGroup(nsDocLoaderImpl* aLoader)
{
nsresult rv;
rv = mLoadGroup->AddSubGroup(aLoader->GetLoadGroup());
if (NS_SUCCEEDED(rv)) {
mChildList->AppendElement((nsIDocumentLoader*)aLoader);
}
return rv;
}
nsresult nsDocLoaderImpl::RemoveChildGroup(nsDocLoaderImpl* aLoader)
{
nsresult rv;
rv = mLoadGroup->RemoveSubGroup(aLoader->GetLoadGroup());
if (NS_SUCCEEDED(rv)) {
mChildList->RemoveElement((nsIDocumentLoader*)aLoader);
}
return rv;
}
NS_IMETHODIMP
nsDocLoaderImpl::CreateLoadGroupListener(nsIStreamListener *aListener,
nsIStreamListener **aResult)
{
nsChannelListener *newListener;
NS_NEWXPCOM(newListener, nsChannelListener);
if (nsnull == newListener) {
return NS_ERROR_OUT_OF_MEMORY;
}
NS_ADDREF(newListener);
newListener->Init(this, aListener);
*aResult = newListener;
return NS_OK;
}
void nsDocLoaderImpl::FireOnStartDocumentLoad(nsDocLoaderImpl* aLoadInitiator,
nsIURI* aURL,
const char* aCommand)
{
PRInt32 count = mDocObservers.Count();
PRInt32 index;
#if defined(DEBUG)
char *buffer;
aURL->GetSpec(&buffer);
PR_LOG(gDocLoaderLog, PR_LOG_DEBUG,
("DocLoader:%p: Firing OnStartDocumentLoad(...) called for [DocLoader:%p] %s.\n",
this, aLoadInitiator, buffer));
nsCRT::free(buffer);
#endif /* DEBUG */
/*
* First notify any observers that the URL load has begun...
*/
for (index = 0; index < count; index++) {
nsIDocumentLoaderObserver* observer = (nsIDocumentLoaderObserver*)mDocObservers.ElementAt(index);
observer->OnStartDocumentLoad(aLoadInitiator, aURL, aCommand);
}
/*
* Finally notify the parent...
*/
if (mParent) {
mParent->FireOnStartDocumentLoad(aLoadInitiator, aURL, aCommand);
}
}
void nsDocLoaderImpl::FireOnEndDocumentLoad(nsDocLoaderImpl* aLoadInitiator,
nsIChannel *aDocChannel,
nsresult aStatus)
{
#if defined(DEBUG)
nsCOMPtr<nsIURI> uri;
nsresult rv = NS_OK;
if (aDocChannel)
rv = aDocChannel->GetURI(getter_AddRefs(uri));
if (NS_SUCCEEDED(rv)) {
char* buffer = nsnull;
if (uri)
rv = uri->GetSpec(&buffer);
if (NS_SUCCEEDED(rv) && buffer != nsnull) {
PR_LOG(gDocLoaderLog, PR_LOG_DEBUG,
("DocLoader:%p: Firing OnEndDocumentLoad(...) called for [DocLoader:%p] %s\n",
this, aLoadInitiator, buffer));
nsCRT::free(buffer);
}
}
#endif /* DEBUG */
/*
* First notify any observers that the document load has finished...
*/
PRInt32 count = mDocObservers.Count();
PRInt32 index;
for (index = 0; index < count; index++) {
nsIDocumentLoaderObserver* observer = (nsIDocumentLoaderObserver*)
mDocObservers.ElementAt(index);
if (observer) {
observer->OnEndDocumentLoad(aLoadInitiator,
aDocChannel,
aStatus, observer);
}
}
/*
* Next notify the parent...
*/
if (mParent) {
mParent->FireOnEndDocumentLoad(aLoadInitiator, aDocChannel, aStatus);
}
}
void nsDocLoaderImpl::FireOnStartURLLoad(nsDocLoaderImpl* aLoadInitiator,
nsIChannel* channel,
nsIContentViewer* aViewer)
{
PRInt32 count = mDocObservers.Count();
PRInt32 index;
/*
* First notify any observers that the URL load has begun...
*/
for (index = 0; index < count; index++) {
nsIDocumentLoaderObserver* observer = (nsIDocumentLoaderObserver*)mDocObservers.ElementAt(index);
observer->OnStartURLLoad(aLoadInitiator, channel, aViewer);
}
/*
* Finally notify the parent...
*/
if (mParent) {
mParent->FireOnStartURLLoad(aLoadInitiator, channel, aViewer);
}
}
void nsDocLoaderImpl::FireOnEndURLLoad(nsDocLoaderImpl* aLoadInitiator,
nsIChannel* channel, nsresult aStatus)
{
PRInt32 count = mDocObservers.Count();
PRInt32 index;
/*
* First notify any observers that the URL load has begun...
*/
for (index = 0; index < count; index++) {
nsIDocumentLoaderObserver* observer = (nsIDocumentLoaderObserver*)mDocObservers.ElementAt(index);
observer->OnEndURLLoad(aLoadInitiator, channel, aStatus);
}
/*
* Finally notify the parent...
*/
if (mParent) {
mParent->FireOnEndURLLoad(aLoadInitiator, channel, aStatus);
}
}
void nsDocLoaderImpl::SetParent(nsDocLoaderImpl* aParent)
{
NS_IF_RELEASE(mParent);
mParent = aParent;
NS_IF_ADDREF(mParent);
}
void nsDocLoaderImpl::SetDocumentChannel(nsIChannel* channel)
{
mDocumentChannel = channel;
}
PRBool nsDocLoaderImpl::IsBusyEnumerator(nsISupports* aElement, void* aData)
{
nsCOMPtr<nsIDocumentLoader> docLoader;
PRBool* result = (PRBool*)aData;
docLoader = do_QueryInterface(aElement);
if (docLoader) {
docLoader->IsBusy(*result);
}
return !(*result);
}
/****************************************************************************
* nsDocumentBindInfo implementation...
****************************************************************************/
nsDocumentBindInfo::nsDocumentBindInfo()
{
NS_INIT_REFCNT();
m_Command = nsnull;
m_Container = nsnull;
m_ExtraInfo = nsnull;
m_NextStream = nsnull;
m_DocLoader = nsnull;
}
nsresult
nsDocumentBindInfo::Init(nsDocLoaderImpl* aDocLoader,
const char *aCommand,
nsIContentViewerContainer* aContainer,
nsISupports* aExtraInfo)
{
m_NextStream = nsnull;
m_Command = (nsnull != aCommand) ? PL_strdup(aCommand) : nsnull;
m_DocLoader = aDocLoader;
NS_ADDREF(m_DocLoader);
m_Container = aContainer;
NS_IF_ADDREF(m_Container);
m_ExtraInfo = aExtraInfo;
NS_IF_ADDREF(m_ExtraInfo);
return NS_OK;
}
nsDocumentBindInfo::~nsDocumentBindInfo()
{
if (m_Command) {
PR_Free(m_Command);
}
m_Command = nsnull;
NS_RELEASE (m_DocLoader);
NS_IF_RELEASE(m_NextStream);
NS_IF_RELEASE(m_Container);
NS_IF_RELEASE(m_ExtraInfo);
}
/*
* Implementation of ISupports methods...
*/
NS_IMPL_ADDREF(nsDocumentBindInfo);
NS_IMPL_RELEASE(nsDocumentBindInfo);
nsresult
nsDocumentBindInfo::QueryInterface(const nsIID& aIID,
void** aInstancePtrResult)
{
NS_PRECONDITION(nsnull != aInstancePtrResult, "null pointer");
if (nsnull == aInstancePtrResult) {
return NS_ERROR_NULL_POINTER;
}
*aInstancePtrResult = NULL;
if (aIID.Equals(kIStreamObserverIID)) {
*aInstancePtrResult = (void*) ((nsIStreamObserver*)this);
NS_ADDREF_THIS();
return NS_OK;
}
if (aIID.Equals(kIStreamListenerIID)) {
*aInstancePtrResult = (void*) ((nsIStreamListener*)this);
NS_ADDREF_THIS();
return NS_OK;
}
if (aIID.Equals(kDocumentBindInfoIID)) {
*aInstancePtrResult = (void*) this;
NS_ADDREF_THIS();
return NS_OK;
}
return NS_NOINTERFACE;
}
class nsWebShellEventSinkGetter : public nsIEventSinkGetter {
public:
NS_DECL_ISUPPORTS
nsWebShellEventSinkGetter(nsIWebShell *aWebShell) {
NS_INIT_REFCNT();
mWebShell = aWebShell;
NS_IF_ADDREF(mWebShell);
}
virtual ~nsWebShellEventSinkGetter() {
NS_IF_RELEASE(mWebShell);
}
NS_IMETHOD GetEventSink(const char* aVerb, const nsIID& anIID, nsISupports** aSink) {
if (mWebShell) {
if (nsCRT::strcmp(aVerb, "load") == 0) {
return mWebShell->QueryInterface(anIID, (void**)aSink);
}
}
return NS_ERROR_FAILURE;
}
private:
nsIWebShell* mWebShell;
};
// XXXbe second arg is unnecessary given first; hidden static IID in macro... scc help!
NS_IMPL_ISUPPORTS(nsWebShellEventSinkGetter, nsCOMTypeInfo<nsIEventSinkGetter>::GetIID())
nsresult nsDocumentBindInfo::Bind(nsIURI* aURL,
nsILoadGroup *aLoadGroup,
nsIInputStream *postDataStream,
const PRUnichar* aReferrer)
{
nsresult rv = NS_OK;
// XXXbe this knows that m_Container implements nsIWebShell
nsCOMPtr<nsIWebShell> webShell = do_QueryInterface(m_Container);
nsCOMPtr<nsIEventSinkGetter> eventSinkGetter = new nsWebShellEventSinkGetter(webShell);
if (!eventSinkGetter)
return NS_ERROR_OUT_OF_MEMORY;
nsCOMPtr<nsIChannel> channel;
rv = NS_OpenURI(getter_AddRefs(channel), aURL, aLoadGroup, eventSinkGetter);
if (NS_FAILED(rv)) return rv;
if (postDataStream || aReferrer)
{
nsCOMPtr<nsIHTTPChannel> httpChannel(do_QueryInterface(channel));
if (httpChannel)
{
if (postDataStream) {
httpChannel->SetRequestMethod(HM_POST);
httpChannel->SetPostDataStream(postDataStream);
}
if (aReferrer) {
// Referer - misspelled, but per the HTTP spec
nsCAutoString str = aReferrer;
nsCOMPtr<nsIAtom> key = NS_NewAtom("referer");
httpChannel->SetRequestHeader(key, str.GetBuffer());
}
}
}
m_DocLoader->SetDocumentChannel(channel);
rv = channel->AsyncRead(0, -1, nsnull, this);
return rv;
}
NS_IMETHODIMP
nsDocumentBindInfo::OnStartRequest(nsIChannel* channel, nsISupports *ctxt)
{
nsresult rv = NS_OK;
nsIContentViewer* viewer = nsnull;
nsCOMPtr<nsIURI> aURL;
rv = channel->GetURI(getter_AddRefs(aURL));
if (NS_FAILED(rv)) return rv;
char* aContentType = nsnull;
rv = channel->GetContentType(&aContentType);
if (NS_FAILED(rv)) return rv;
#if defined(DEBUG)
char* spec;
(void)aURL->GetSpec(&spec);
PR_LOG(gDocLoaderLog, PR_LOG_DEBUG,
("DocumentBindInfo:%p OnStartRequest(...) called for %s. Content-type is %s\n",
this, spec, aContentType));
nsCRT::free(spec);
#endif /* DEBUG */
if (nsnull == m_NextStream) {
/*
* Now that the content type is available, create a document
* (and viewer) of the appropriate type...
*/
if (m_DocLoader) {
rv = m_DocLoader->CreateContentViewer(m_Command,
channel,
aContentType,
m_Container,
m_ExtraInfo,
&m_NextStream,
&viewer);
} else {
rv = NS_ERROR_NULL_POINTER;
}
if (NS_FAILED(rv)) {
printf("DocLoaderFactory: Unable to create ContentViewer for command=%s, content-type=%s\n", m_Command ? m_Command : "(null)", aContentType);
if ( m_Container ) {
// Give content container a chance to do something with this URL.
rv = m_Container->HandleUnknownContentType( (nsIDocumentLoader*) m_DocLoader, channel, aContentType, m_Command );
}
// Stop the binding.
// This crashes on Unix/Mac... Stop();
goto done;
}
/*
* Give the document container the new viewer...
*/
if (m_Container) {
viewer->SetContainer(m_Container);
rv = m_Container->Embed(viewer, m_Command, m_ExtraInfo);
if (NS_FAILED(rv)) {
goto done;
}
}
}
/*
* Pass the OnStartRequest(...) notification out to the document
* IStreamListener.
*/
if (nsnull != m_NextStream) {
rv = m_NextStream->OnStartRequest(channel, ctxt);
}
done:
NS_IF_RELEASE(viewer);
nsCRT::free(aContentType);
return rv;
}
NS_METHOD nsDocumentBindInfo::OnDataAvailable(nsIChannel* channel, nsISupports *ctxt,
nsIInputStream *aStream,
PRUint32 sourceOffset,
PRUint32 aLength)
{
nsresult rv;
nsCOMPtr<nsIURI> aURL;
rv = channel->GetURI(getter_AddRefs(aURL));
if (NS_FAILED(rv)) return rv;
#if defined(DEBUG)
char* spec;
(void)aURL->GetSpec(&spec);
PR_LOG(gDocLoaderLog, PR_LOG_DEBUG,
("DocumentBindInfo:%p: OnDataAvailable(...) called for %s. Bytes available: %d.\n",
this, spec, aLength));
nsCRT::free(spec);
#endif /* DEBUG */
if (nsnull != m_NextStream) {
/*
* Bump the refcount in case the stream gets destroyed while the data
* is being processed... If Stop(...) is called the stream could be
* freed prematurely :-(
*
* Currently this can happen if javascript loads a new URL
* (via nsIWebShell::LoadURL) during the parse phase...
*/
nsIStreamListener* listener = m_NextStream;
NS_ADDREF(listener);
rv = listener->OnDataAvailable(channel, ctxt, aStream, sourceOffset, aLength);
NS_RELEASE(listener);
} else {
rv = NS_BINDING_FAILED;
}
return rv;
}
NS_METHOD nsDocumentBindInfo::OnStopRequest(nsIChannel* channel, nsISupports *ctxt,
nsresult aStatus, const PRUnichar *aMsg)
{
nsresult rv;
nsCOMPtr<nsIURI> aURL;
rv = channel->GetURI(getter_AddRefs(aURL));
if (NS_FAILED(rv)) return rv;
#if defined(DEBUG)
char* spec;
(void)aURL->GetSpec(&spec);
PR_LOG(gDocLoaderLog, PR_LOG_DEBUG,
("DocumentBindInfo:%p: OnStopRequest(...) called for %s. Status: %d.\n",
this, spec, aStatus));
nsCRT::free(spec);
#endif // DEBUG
if (NS_FAILED(aStatus)) {
char *url;
aURL->GetSpec(&url);
if (aStatus == NS_ERROR_UNKNOWN_HOST)
printf("Error: Unknown host: %s\n", url);
else if (aStatus == NS_ERROR_MALFORMED_URI)
printf("Error: Malformed URI: %s\n", url);
else if (NS_FAILED(aStatus))
printf("Error: Can't load: %s (%x)\n", url, aStatus);
nsCRT::free(url);
}
if (nsnull != m_NextStream) {
rv = m_NextStream->OnStopRequest(channel, ctxt, aStatus, aMsg);
}
NS_IF_RELEASE(m_NextStream);
return rv;
}
NS_IMPL_ISUPPORTS2(nsChannelListener, nsIStreamObserver, nsIStreamListener);
nsChannelListener::nsChannelListener()
{
NS_INIT_REFCNT();
mDocLoader = nsnull;
}
nsresult nsChannelListener::Init(nsDocLoaderImpl *aDocLoader,
nsIStreamListener *aListener)
{
mDocLoader = aDocLoader;
NS_ADDREF(mDocLoader);
mNextListener = aListener;
return NS_OK;
}
nsChannelListener::~nsChannelListener()
{
NS_RELEASE(mDocLoader);
mNextListener = null_nsCOMPtr();
}
NS_IMETHODIMP
nsChannelListener::OnStartRequest(nsIChannel *aChannel, nsISupports *aContext)
{
nsresult rv;
nsCOMPtr<nsIContentViewerContainer> container;
nsCOMPtr<nsIContentViewer> viewer;
///////////////////////////////
// STREAM CONVERTERS
///////////////////////////////
nsXPIDLCString contentType;
rv = aChannel->GetContentType(getter_Copies(contentType));
if (NS_FAILED(rv)) return rv;
PRBool conversionRequired = PR_FALSE;
nsAutoString from, to;
// Let's shanghai this channelListener's mNextListener if we want to convert the stream.
if (!PL_strcmp(contentType, "message/rfc822"))
{
from = "message/rfc822";
to = "text/xul";
conversionRequired = PR_TRUE;
}
else if (!PL_strcmp(contentType, "multipart/x-mixed-replace"))
{
from = "multipart/x-mixed-replace";
to = "text/html";
conversionRequired = PR_TRUE;
}
if (conversionRequired)
{
NS_WITH_SERVICE(nsIStreamConverterService, StreamConvService, kStreamConverterServiceCID, &rv);
if (NS_FAILED(rv)) return rv;
// The following call binds this channelListener's mNextListener (typically
// the nsDocumentBindInfo) to the underlying stream converter, and returns
// the underlying stream converter which we then set to be this channelListener's
// mNextListener. This effectively nestles the stream converter down right
// in between the raw stream and the final listener.
nsIStreamListener *converterListener = nsnull;
rv = StreamConvService->AsyncConvertData(from.GetUnicode(), to.GetUnicode(), mNextListener, aChannel,
&converterListener);
mNextListener = converterListener;
NS_IF_RELEASE(converterListener);
}
//////////////////////////////
// END STREAM CONVERTERS
//////////////////////////////
// Pass the notification to the next listener...
rv = mNextListener->OnStartRequest(aChannel, aContext);
//
// Notify the document loader...
mDocLoader->GetContainer(getter_AddRefs(container));
if (container) {
container->GetContentViewer(getter_AddRefs(viewer));
}
if (mDocLoader->IsLoadingDocument()) {
nsLoadFlags loadAttribs;
aChannel->GetLoadAttributes(&loadAttribs);
if (!(loadAttribs & nsIChannel::LOAD_BACKGROUND)) {
mDocLoader->FireOnStartURLLoad(mDocLoader,
aChannel,
viewer);
}
}
return rv;
}
NS_IMETHODIMP
nsChannelListener::OnStopRequest(nsIChannel *aChannel, nsISupports *aContext,
nsresult aStatus, const PRUnichar *aMsg)
{
nsresult rv;
rv = mNextListener->OnStopRequest(aChannel, aContext, aStatus, aMsg);
if (mDocLoader->IsLoadingDocument()) {
nsLoadFlags loadAttribs;
aChannel->GetLoadAttributes(&loadAttribs);
if (!(loadAttribs & nsIChannel::LOAD_BACKGROUND)) {
mDocLoader->FireOnEndURLLoad(mDocLoader,
aChannel,
aStatus);
}
}
return rv;
}
NS_IMETHODIMP
nsChannelListener::OnDataAvailable(nsIChannel *aChannel, nsISupports *aContext,
nsIInputStream *aInStream, PRUint32 aOffset,
PRUint32 aCount)
{
return mNextListener->OnDataAvailable(aChannel, aContext, aInStream,
aOffset, aCount);
}
/*******************************************
* nsDocLoaderServiceFactory
*******************************************/
static nsDocLoaderImpl* gServiceInstance = nsnull;
NS_IMETHODIMP
nsDocLoaderImpl::Create(nsISupports *aOuter, const nsIID &aIID, void **aResult)
{
nsresult rv;
nsDocLoaderImpl* inst;
// Parameter validation...
if (NULL == aResult) {
rv = NS_ERROR_NULL_POINTER;
goto done;
}
// Do not support aggregatable components...
*aResult = NULL;
if (NULL != aOuter) {
rv = NS_ERROR_NO_AGGREGATION;
goto done;
}
if (NULL == gServiceInstance) {
// Create a new instance of the component...
NS_NEWXPCOM(gServiceInstance, nsDocLoaderImpl);
if (NULL == gServiceInstance) {
rv = NS_ERROR_OUT_OF_MEMORY;
goto done;
}
}
// If the QI fails, the component will be destroyed...
//
// Use a local copy so the NS_RELEASE() will not null the global
// pointer...
inst = gServiceInstance;
NS_ADDREF(inst);
rv = inst->QueryInterface(aIID, aResult);
if (NS_SUCCEEDED(rv)) {
rv = inst->Init();
}
NS_RELEASE(inst);
done:
return rv;
}
// Entry point to create nsDocLoaderService factory instances...
nsresult NS_NewDocLoaderServiceFactory(nsIFactory** aResult)
{
nsresult rv = NS_OK;
nsIGenericFactory* factory;
rv = nsComponentManager::CreateInstance(kGenericFactoryCID, nsnull,
nsIGenericFactory::GetIID(),
(void**)&factory);
if (NS_FAILED(rv)) return rv;
rv = factory->SetConstructor(nsDocLoaderImpl::Create);
if (NS_FAILED(rv)) {
NS_RELEASE(factory);
return rv;
}
*aResult = factory;
return rv;
}
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