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nsContentSink.cpp
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nsContentSink.cpp
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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set ts=2 sw=2 et tw=78: */
/* 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/. */
/*
* Base class for the XML and HTML content sinks, which construct a
* DOM based on information from the parser.
*/
#include "nsContentSink.h"
#include "nsScriptLoader.h"
#include "nsIDocument.h"
#include "nsIDOMDocument.h"
#include "mozilla/css/Loader.h"
#include "nsStyleConsts.h"
#include "nsStyleLinkElement.h"
#include "nsINodeInfo.h"
#include "nsIDocShell.h"
#include "nsILoadContext.h"
#include "nsIDocShellTreeItem.h"
#include "nsCPrefetchService.h"
#include "nsIURI.h"
#include "nsNetUtil.h"
#include "nsIHttpChannel.h"
#include "nsIContent.h"
#include "nsIScriptElement.h"
#include "nsContentErrors.h"
#include "nsIPresShell.h"
#include "nsPresContext.h"
#include "nsIViewManager.h"
#include "nsIContentViewer.h"
#include "nsIAtom.h"
#include "nsGkAtoms.h"
#include "nsIDOMWindow.h"
#include "nsIPrincipal.h"
#include "nsIScriptGlobalObject.h"
#include "nsNetCID.h"
#include "nsIOfflineCacheUpdate.h"
#include "nsIApplicationCache.h"
#include "nsIApplicationCacheContainer.h"
#include "nsIApplicationCacheChannel.h"
#include "nsIScriptSecurityManager.h"
#include "nsIDOMLoadStatus.h"
#include "nsICookieService.h"
#include "nsIPrompt.h"
#include "nsServiceManagerUtils.h"
#include "nsContentUtils.h"
#include "nsCRT.h"
#include "nsEscape.h"
#include "nsWeakReference.h"
#include "nsUnicharUtils.h"
#include "nsNodeInfoManager.h"
#include "nsIAppShell.h"
#include "nsIWidget.h"
#include "nsWidgetsCID.h"
#include "nsIRequest.h"
#include "nsNodeUtils.h"
#include "nsIDOMNode.h"
#include "nsThreadUtils.h"
#include "nsPIDOMWindow.h"
#include "mozAutoDocUpdate.h"
#include "nsIWebNavigation.h"
#include "nsIDocumentLoader.h"
#include "nsICachingChannel.h"
#include "nsICacheEntryDescriptor.h"
#include "nsGenericHTMLElement.h"
#include "nsHTMLDNSPrefetch.h"
#include "nsISupportsPrimitives.h"
#include "nsIObserverService.h"
#include "mozilla/Preferences.h"
#include "nsParserConstants.h"
using namespace mozilla;
PRLogModuleInfo* gContentSinkLogModuleInfo;
NS_IMPL_CYCLE_COLLECTING_ADDREF(nsContentSink)
NS_IMPL_CYCLE_COLLECTING_RELEASE(nsContentSink)
NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION(nsContentSink)
NS_INTERFACE_MAP_ENTRY(nsICSSLoaderObserver)
NS_INTERFACE_MAP_ENTRY(nsISupportsWeakReference)
NS_INTERFACE_MAP_ENTRY(nsIDocumentObserver)
NS_INTERFACE_MAP_ENTRY(nsIMutationObserver)
NS_INTERFACE_MAP_ENTRY(nsITimerCallback)
NS_INTERFACE_MAP_ENTRY_AMBIGUOUS(nsISupports, nsIDocumentObserver)
NS_INTERFACE_MAP_END
NS_IMPL_CYCLE_COLLECTION_CLASS(nsContentSink)
NS_IMPL_CYCLE_COLLECTION_UNLINK_BEGIN(nsContentSink)
if (tmp->mDocument) {
tmp->mDocument->RemoveObserver(tmp);
}
NS_IMPL_CYCLE_COLLECTION_UNLINK_NSCOMPTR(mDocument)
NS_IMPL_CYCLE_COLLECTION_UNLINK_NSCOMPTR(mParser)
NS_IMPL_CYCLE_COLLECTION_UNLINK_NSCOMPTR(mNodeInfoManager)
NS_IMPL_CYCLE_COLLECTION_UNLINK_NSCOMPTR(mScriptLoader)
NS_IMPL_CYCLE_COLLECTION_UNLINK_END
NS_IMPL_CYCLE_COLLECTION_TRAVERSE_BEGIN(nsContentSink)
NS_IMPL_CYCLE_COLLECTION_TRAVERSE_NSCOMPTR(mDocument)
NS_IMPL_CYCLE_COLLECTION_TRAVERSE_NSCOMPTR(mParser)
NS_IMPL_CYCLE_COLLECTION_TRAVERSE_NATIVE_MEMBER(mNodeInfoManager,
nsNodeInfoManager)
NS_IMPL_CYCLE_COLLECTION_TRAVERSE_NSCOMPTR(mScriptLoader)
NS_IMPL_CYCLE_COLLECTION_TRAVERSE_END
nsContentSink::nsContentSink()
{
// We have a zeroing operator new
NS_ASSERTION(!mLayoutStarted, "What?");
NS_ASSERTION(!mDynamicLowerValue, "What?");
NS_ASSERTION(!mParsing, "What?");
NS_ASSERTION(mLastSampledUserEventTime == 0, "What?");
NS_ASSERTION(mDeflectedCount == 0, "What?");
NS_ASSERTION(!mDroppedTimer, "What?");
NS_ASSERTION(mInMonolithicContainer == 0, "What?");
NS_ASSERTION(mInNotification == 0, "What?");
NS_ASSERTION(!mDeferredLayoutStart, "What?");
#ifdef DEBUG
if (!gContentSinkLogModuleInfo) {
gContentSinkLogModuleInfo = PR_NewLogModule("nscontentsink");
}
#endif
}
nsContentSink::~nsContentSink()
{
if (mDocument) {
// Remove ourselves just to be safe, though we really should have
// been removed in DidBuildModel if everything worked right.
mDocument->RemoveObserver(this);
}
}
bool nsContentSink::sNotifyOnTimer;
PRInt32 nsContentSink::sBackoffCount;
PRInt32 nsContentSink::sNotificationInterval;
PRInt32 nsContentSink::sInteractiveDeflectCount;
PRInt32 nsContentSink::sPerfDeflectCount;
PRInt32 nsContentSink::sPendingEventMode;
PRInt32 nsContentSink::sEventProbeRate;
PRInt32 nsContentSink::sInteractiveParseTime;
PRInt32 nsContentSink::sPerfParseTime;
PRInt32 nsContentSink::sInteractiveTime;
PRInt32 nsContentSink::sInitialPerfTime;
PRInt32 nsContentSink::sEnablePerfMode;
void
nsContentSink::InitializeStatics()
{
Preferences::AddBoolVarCache(&sNotifyOnTimer,
"content.notify.ontimer", true);
// -1 means never.
Preferences::AddIntVarCache(&sBackoffCount,
"content.notify.backoffcount", -1);
// The gNotificationInterval has a dramatic effect on how long it
// takes to initially display content for slow connections.
// The current value provides good
// incremental display of content without causing an increase
// in page load time. If this value is set below 1/10 of second
// it starts to impact page load performance.
// see bugzilla bug 72138 for more info.
Preferences::AddIntVarCache(&sNotificationInterval,
"content.notify.interval", 120000);
Preferences::AddIntVarCache(&sInteractiveDeflectCount,
"content.sink.interactive_deflect_count", 0);
Preferences::AddIntVarCache(&sPerfDeflectCount,
"content.sink.perf_deflect_count", 200);
Preferences::AddIntVarCache(&sPendingEventMode,
"content.sink.pending_event_mode", 1);
Preferences::AddIntVarCache(&sEventProbeRate,
"content.sink.event_probe_rate", 1);
Preferences::AddIntVarCache(&sInteractiveParseTime,
"content.sink.interactive_parse_time", 3000);
Preferences::AddIntVarCache(&sPerfParseTime,
"content.sink.perf_parse_time", 360000);
Preferences::AddIntVarCache(&sInteractiveTime,
"content.sink.interactive_time", 750000);
Preferences::AddIntVarCache(&sInitialPerfTime,
"content.sink.initial_perf_time", 2000000);
Preferences::AddIntVarCache(&sEnablePerfMode,
"content.sink.enable_perf_mode", 0);
}
nsresult
nsContentSink::Init(nsIDocument* aDoc,
nsIURI* aURI,
nsISupports* aContainer,
nsIChannel* aChannel)
{
NS_PRECONDITION(aDoc, "null ptr");
NS_PRECONDITION(aURI, "null ptr");
if (!aDoc || !aURI) {
return NS_ERROR_NULL_POINTER;
}
mDocument = aDoc;
mDocumentURI = aURI;
mDocShell = do_QueryInterface(aContainer);
mScriptLoader = mDocument->ScriptLoader();
if (!mRunsToCompletion) {
if (mDocShell) {
PRUint32 loadType = 0;
mDocShell->GetLoadType(&loadType);
mDocument->SetChangeScrollPosWhenScrollingToRef(
(loadType & nsIDocShell::LOAD_CMD_HISTORY) == 0);
}
ProcessHTTPHeaders(aChannel);
}
mCSSLoader = aDoc->CSSLoader();
mNodeInfoManager = aDoc->NodeInfoManager();
mBackoffCount = sBackoffCount;
if (sEnablePerfMode != 0) {
mDynamicLowerValue = sEnablePerfMode == 1;
FavorPerformanceHint(!mDynamicLowerValue, 0);
}
return NS_OK;
}
NS_IMETHODIMP
nsContentSink::StyleSheetLoaded(nsCSSStyleSheet* aSheet,
bool aWasAlternate,
nsresult aStatus)
{
NS_ASSERTION(!mRunsToCompletion, "How come a fragment parser observed sheets?");
if (!aWasAlternate) {
NS_ASSERTION(mPendingSheetCount > 0, "How'd that happen?");
--mPendingSheetCount;
if (mPendingSheetCount == 0 &&
(mDeferredLayoutStart || mDeferredFlushTags)) {
if (mDeferredFlushTags) {
FlushTags();
}
if (mDeferredLayoutStart) {
// We might not have really started layout, since this sheet was still
// loading. Do it now. Probably doesn't matter whether we do this
// before or after we unblock scripts, but before feels saner. Note
// that if mDeferredLayoutStart is true, that means any subclass
// StartLayout() stuff that needs to happen has already happened, so we
// don't need to worry about it.
StartLayout(false);
}
// Go ahead and try to scroll to our ref if we have one
ScrollToRef();
}
mScriptLoader->RemoveExecuteBlocker();
}
return NS_OK;
}
nsresult
nsContentSink::ProcessHTTPHeaders(nsIChannel* aChannel)
{
nsCOMPtr<nsIHttpChannel> httpchannel(do_QueryInterface(aChannel));
if (!httpchannel) {
return NS_OK;
}
// Note that the only header we care about is the "link" header, since we
// have all the infrastructure for kicking off stylesheet loads.
nsCAutoString linkHeader;
nsresult rv = httpchannel->GetResponseHeader(NS_LITERAL_CSTRING("link"),
linkHeader);
if (NS_SUCCEEDED(rv) && !linkHeader.IsEmpty()) {
mDocument->SetHeaderData(nsGkAtoms::link,
NS_ConvertASCIItoUTF16(linkHeader));
NS_ASSERTION(!mProcessLinkHeaderEvent.get(),
"Already dispatched an event?");
mProcessLinkHeaderEvent =
NS_NewNonOwningRunnableMethod(this,
&nsContentSink::DoProcessLinkHeader);
rv = NS_DispatchToCurrentThread(mProcessLinkHeaderEvent.get());
if (NS_FAILED(rv)) {
mProcessLinkHeaderEvent.Forget();
}
}
return NS_OK;
}
nsresult
nsContentSink::ProcessHeaderData(nsIAtom* aHeader, const nsAString& aValue,
nsIContent* aContent)
{
nsresult rv = NS_OK;
// necko doesn't process headers coming in from the parser
mDocument->SetHeaderData(aHeader, aValue);
if (aHeader == nsGkAtoms::setcookie) {
// Note: Necko already handles cookies set via the channel. We can't just
// call SetCookie on the channel because we want to do some security checks
// here and want to use the prompt associated to our current window, not
// the window where the channel was dispatched.
nsCOMPtr<nsICookieService> cookieServ =
do_GetService(NS_COOKIESERVICE_CONTRACTID, &rv);
if (NS_FAILED(rv)) {
return rv;
}
// Get a URI from the document principal
// We use the original codebase in case the codebase was changed
// by SetDomain
// Note that a non-codebase principal (eg the system principal) will return
// a null URI.
nsCOMPtr<nsIURI> codebaseURI;
rv = mDocument->NodePrincipal()->GetURI(getter_AddRefs(codebaseURI));
NS_ENSURE_TRUE(codebaseURI, rv);
nsCOMPtr<nsIPrompt> prompt;
nsCOMPtr<nsIDOMWindow> window = do_QueryInterface(mDocument->GetScriptGlobalObject());
if (window) {
window->GetPrompter(getter_AddRefs(prompt));
}
nsCOMPtr<nsIChannel> channel;
if (mParser) {
mParser->GetChannel(getter_AddRefs(channel));
}
rv = cookieServ->SetCookieString(codebaseURI,
prompt,
NS_ConvertUTF16toUTF8(aValue).get(),
channel);
if (NS_FAILED(rv)) {
return rv;
}
}
else if (aHeader == nsGkAtoms::msthemecompatible) {
// Disable theming for the presshell if the value is no.
// XXXbz don't we want to support this as an HTTP header too?
nsAutoString value(aValue);
if (value.LowerCaseEqualsLiteral("no")) {
nsIPresShell* shell = mDocument->GetShell();
if (shell) {
shell->DisableThemeSupport();
}
}
}
return rv;
}
void
nsContentSink::DoProcessLinkHeader()
{
nsAutoString value;
mDocument->GetHeaderData(nsGkAtoms::link, value);
ProcessLinkHeader(nsnull, value);
}
// check whether the Link header field applies to the context resource
// see <http://tools.ietf.org/html/rfc5988#section-5.2>
bool
nsContentSink::LinkContextIsOurDocument(const nsSubstring& aAnchor)
{
if (aAnchor.IsEmpty()) {
// anchor parameter not present or empty -> same document reference
return true;
}
nsIURI* docUri = mDocument->GetDocumentURI();
// the document URI might contain a fragment identifier ("#...')
// we want to ignore that because it's invisible to the server
// and just affects the local interpretation in the recipient
nsCOMPtr<nsIURI> contextUri;
nsresult rv = docUri->CloneIgnoringRef(getter_AddRefs(contextUri));
if (NS_FAILED(rv)) {
// copying failed
return false;
}
// resolve anchor against context
nsCOMPtr<nsIURI> resolvedUri;
rv = NS_NewURI(getter_AddRefs(resolvedUri), aAnchor,
nsnull, contextUri);
if (NS_FAILED(rv)) {
// resolving failed
return false;
}
bool same;
rv = contextUri->Equals(resolvedUri, &same);
if (NS_FAILED(rv)) {
// comparison failed
return false;
}
return same;
}
// Decode a parameter value using the encoding defined in RFC 5987 (in place)
//
// charset "'" [ language ] "'" value-chars
//
// returns true when decoding happened successfully (otherwise leaves
// passed value alone)
bool
nsContentSink::Decode5987Format(nsAString& aEncoded) {
nsresult rv;
nsCOMPtr<nsIMIMEHeaderParam> mimehdrpar =
do_GetService(NS_MIMEHEADERPARAM_CONTRACTID, &rv);
if (NS_FAILED(rv))
return false;
nsCAutoString asciiValue;
const PRUnichar* encstart = aEncoded.BeginReading();
const PRUnichar* encend = aEncoded.EndReading();
// create a plain ASCII string, aborting if we can't do that
// converted form is always shorter than input
while (encstart != encend) {
if (*encstart > 0 && *encstart < 128) {
asciiValue.Append((char)*encstart);
} else {
return false;
}
encstart++;
}
nsAutoString decoded;
nsCAutoString language;
rv = mimehdrpar->DecodeRFC5987Param(asciiValue, language, decoded);
if (NS_FAILED(rv))
return false;
aEncoded = decoded;
return true;
}
nsresult
nsContentSink::ProcessLinkHeader(nsIContent* aElement,
const nsAString& aLinkData)
{
nsresult rv = NS_OK;
// keep track where we are within the header field
bool seenParameters = false;
// parse link content and call process style link
nsAutoString href;
nsAutoString rel;
nsAutoString title;
nsAutoString titleStar;
nsAutoString type;
nsAutoString media;
nsAutoString anchor;
// copy to work buffer
nsAutoString stringList(aLinkData);
// put an extra null at the end
stringList.Append(kNullCh);
PRUnichar* start = stringList.BeginWriting();
PRUnichar* end = start;
PRUnichar* last = start;
PRUnichar endCh;
while (*start != kNullCh) {
// skip leading space
while ((*start != kNullCh) && nsCRT::IsAsciiSpace(*start)) {
++start;
}
end = start;
last = end - 1;
bool wasQuotedString = false;
// look for semicolon or comma
while (*end != kNullCh && *end != kSemicolon && *end != kComma) {
PRUnichar ch = *end;
if (ch == kQuote || ch == kLessThan) {
// quoted string
PRUnichar quote = ch;
if (quote == kLessThan) {
quote = kGreaterThan;
}
wasQuotedString = (ch == kQuote);
PRUnichar* closeQuote = (end + 1);
// seek closing quote
while (*closeQuote != kNullCh && quote != *closeQuote) {
// in quoted-string, "\" is an escape character
if (wasQuotedString && *closeQuote == kBackSlash && *(closeQuote + 1) != kNullCh) {
++closeQuote;
}
++closeQuote;
}
if (quote == *closeQuote) {
// found closer
// skip to close quote
end = closeQuote;
last = end - 1;
ch = *(end + 1);
if (ch != kNullCh && ch != kSemicolon && ch != kComma) {
// end string here
*(++end) = kNullCh;
ch = *(end + 1);
// keep going until semi or comma
while (ch != kNullCh && ch != kSemicolon && ch != kComma) {
++end;
ch = *end;
}
}
}
}
++end;
++last;
}
endCh = *end;
// end string here
*end = kNullCh;
if (start < end) {
if ((*start == kLessThan) && (*last == kGreaterThan)) {
*last = kNullCh;
// first instance of <...> wins
// also, do not allow hrefs after the first param was seen
if (href.IsEmpty() && !seenParameters) {
href = (start + 1);
href.StripWhitespace();
}
} else {
PRUnichar* equals = start;
seenParameters = true;
while ((*equals != kNullCh) && (*equals != kEqual)) {
equals++;
}
if (*equals != kNullCh) {
*equals = kNullCh;
nsAutoString attr(start);
attr.StripWhitespace();
PRUnichar* value = ++equals;
while (nsCRT::IsAsciiSpace(*value)) {
value++;
}
if ((*value == kQuote) && (*value == *last)) {
*last = kNullCh;
value++;
}
if (wasQuotedString) {
// unescape in-place
PRUnichar* unescaped = value;
PRUnichar *src = value;
while (*src != kNullCh) {
if (*src == kBackSlash && *(src + 1) != kNullCh) {
src++;
}
*unescaped++ = *src++;
}
*unescaped = kNullCh;
}
if (attr.LowerCaseEqualsLiteral("rel")) {
if (rel.IsEmpty()) {
rel = value;
rel.CompressWhitespace();
}
} else if (attr.LowerCaseEqualsLiteral("title")) {
if (title.IsEmpty()) {
title = value;
title.CompressWhitespace();
}
} else if (attr.LowerCaseEqualsLiteral("title*")) {
if (titleStar.IsEmpty() && !wasQuotedString) {
// RFC 5987 encoding; uses token format only, so skip if we get
// here with a quoted-string
nsAutoString tmp;
tmp = value;
if (Decode5987Format(tmp)) {
titleStar = tmp;
titleStar.CompressWhitespace();
} else {
// header value did not parse, throw it away
titleStar.Truncate();
}
}
} else if (attr.LowerCaseEqualsLiteral("type")) {
if (type.IsEmpty()) {
type = value;
type.StripWhitespace();
}
} else if (attr.LowerCaseEqualsLiteral("media")) {
if (media.IsEmpty()) {
media = value;
// The HTML5 spec is formulated in terms of the CSS3 spec,
// which specifies that media queries are case insensitive.
nsContentUtils::ASCIIToLower(media);
}
} else if (attr.LowerCaseEqualsLiteral("anchor")) {
if (anchor.IsEmpty()) {
anchor = value;
anchor.StripWhitespace();
}
}
}
}
}
if (endCh == kComma) {
// hit a comma, process what we've got so far
href.Trim(" \t\n\r\f"); // trim HTML5 whitespace
if (!href.IsEmpty() && !rel.IsEmpty()) {
rv = ProcessLink(aElement, anchor, href, rel,
// prefer RFC 5987 variant over non-I18zed version
titleStar.IsEmpty() ? title : titleStar,
type, media);
}
href.Truncate();
rel.Truncate();
title.Truncate();
type.Truncate();
media.Truncate();
anchor.Truncate();
seenParameters = false;
}
start = ++end;
}
href.Trim(" \t\n\r\f"); // trim HTML5 whitespace
if (!href.IsEmpty() && !rel.IsEmpty()) {
rv = ProcessLink(aElement, anchor, href, rel,
// prefer RFC 5987 variant over non-I18zed version
titleStar.IsEmpty() ? title : titleStar,
type, media);
}
return rv;
}
nsresult
nsContentSink::ProcessLink(nsIContent* aElement,
const nsSubstring& aAnchor, const nsSubstring& aHref,
const nsSubstring& aRel, const nsSubstring& aTitle,
const nsSubstring& aType, const nsSubstring& aMedia)
{
PRUint32 linkTypes = nsStyleLinkElement::ParseLinkTypes(aRel);
// The link relation may apply to a different resource, specified
// in the anchor parameter. For the link relations supported so far,
// we simply abort if the link applies to a resource different to the
// one we've loaded
if (!LinkContextIsOurDocument(aAnchor)) {
return NS_OK;
}
bool hasPrefetch = linkTypes & PREFETCH;
// prefetch href if relation is "next" or "prefetch"
if (hasPrefetch || (linkTypes & NEXT)) {
PrefetchHref(aHref, aElement, hasPrefetch);
}
if (!aHref.IsEmpty() && (linkTypes & DNS_PREFETCH)) {
PrefetchDNS(aHref);
}
// is it a stylesheet link?
if (!(linkTypes & STYLESHEET)) {
return NS_OK;
}
bool isAlternate = linkTypes & ALTERNATE;
return ProcessStyleLink(aElement, aHref, isAlternate, aTitle, aType,
aMedia);
}
nsresult
nsContentSink::ProcessStyleLink(nsIContent* aElement,
const nsSubstring& aHref,
bool aAlternate,
const nsSubstring& aTitle,
const nsSubstring& aType,
const nsSubstring& aMedia)
{
if (aAlternate && aTitle.IsEmpty()) {
// alternates must have title return without error, for now
return NS_OK;
}
nsAutoString mimeType;
nsAutoString params;
nsContentUtils::SplitMimeType(aType, mimeType, params);
// see bug 18817
if (!mimeType.IsEmpty() && !mimeType.LowerCaseEqualsLiteral("text/css")) {
// Unknown stylesheet language
return NS_OK;
}
nsCOMPtr<nsIURI> url;
nsresult rv = NS_NewURI(getter_AddRefs(url), aHref, nsnull,
mDocument->GetDocBaseURI());
if (NS_FAILED(rv)) {
// The URI is bad, move along, don't propagate the error (for now)
return NS_OK;
}
// If this is a fragment parser, we don't want to observe.
bool isAlternate;
rv = mCSSLoader->LoadStyleLink(aElement, url, aTitle, aMedia, aAlternate,
mRunsToCompletion ? nsnull : this, &isAlternate);
NS_ENSURE_SUCCESS(rv, rv);
if (!isAlternate && !mRunsToCompletion) {
++mPendingSheetCount;
mScriptLoader->AddExecuteBlocker();
}
return NS_OK;
}
nsresult
nsContentSink::ProcessMETATag(nsIContent* aContent)
{
NS_ASSERTION(aContent, "missing meta-element");
nsresult rv = NS_OK;
// set any HTTP-EQUIV data into document's header data as well as url
nsAutoString header;
aContent->GetAttr(kNameSpaceID_None, nsGkAtoms::httpEquiv, header);
if (!header.IsEmpty()) {
nsAutoString result;
aContent->GetAttr(kNameSpaceID_None, nsGkAtoms::content, result);
if (!result.IsEmpty()) {
nsContentUtils::ASCIIToLower(header);
nsCOMPtr<nsIAtom> fieldAtom(do_GetAtom(header));
rv = ProcessHeaderData(fieldAtom, result, aContent);
}
}
NS_ENSURE_SUCCESS(rv, rv);
if (aContent->AttrValueIs(kNameSpaceID_None, nsGkAtoms::name,
nsGkAtoms::handheldFriendly, eIgnoreCase)) {
nsAutoString result;
aContent->GetAttr(kNameSpaceID_None, nsGkAtoms::content, result);
if (!result.IsEmpty()) {
nsContentUtils::ASCIIToLower(result);
mDocument->SetHeaderData(nsGkAtoms::handheldFriendly, result);
}
}
return rv;
}
void
nsContentSink::PrefetchHref(const nsAString &aHref,
nsIContent *aSource,
bool aExplicit)
{
//
// SECURITY CHECK: disable prefetching from mailnews!
//
// walk up the docshell tree to see if any containing
// docshell are of type MAIL.
//
if (!mDocShell)
return;
nsCOMPtr<nsIDocShell> docshell = mDocShell;
nsCOMPtr<nsIDocShellTreeItem> treeItem, parentItem;
do {
PRUint32 appType = 0;
nsresult rv = docshell->GetAppType(&appType);
if (NS_FAILED(rv) || appType == nsIDocShell::APP_TYPE_MAIL)
return; // do not prefetch from mailnews
treeItem = do_QueryInterface(docshell);
if (treeItem) {
treeItem->GetParent(getter_AddRefs(parentItem));
if (parentItem) {
treeItem = parentItem;
docshell = do_QueryInterface(treeItem);
if (!docshell) {
NS_ERROR("cannot get a docshell from a treeItem!");
return;
}
}
}
} while (parentItem);
// OK, we passed the security check...
nsCOMPtr<nsIPrefetchService> prefetchService(do_GetService(NS_PREFETCHSERVICE_CONTRACTID));
if (prefetchService) {
// construct URI using document charset
const nsACString &charset = mDocument->GetDocumentCharacterSet();
nsCOMPtr<nsIURI> uri;
NS_NewURI(getter_AddRefs(uri), aHref,
charset.IsEmpty() ? nsnull : PromiseFlatCString(charset).get(),
mDocument->GetDocBaseURI());
if (uri) {
nsCOMPtr<nsIDOMNode> domNode = do_QueryInterface(aSource);
prefetchService->PrefetchURI(uri, mDocumentURI, domNode, aExplicit);
}
}
}
void
nsContentSink::PrefetchDNS(const nsAString &aHref)
{
nsAutoString hostname;
if (StringBeginsWith(aHref, NS_LITERAL_STRING("//"))) {
hostname = Substring(aHref, 2);
}
else {
nsCOMPtr<nsIURI> uri;
NS_NewURI(getter_AddRefs(uri), aHref);
if (!uri) {
return;
}
nsCAutoString host;
uri->GetHost(host);
CopyUTF8toUTF16(host, hostname);
}
if (!hostname.IsEmpty() && nsHTMLDNSPrefetch::IsAllowed(mDocument)) {
nsHTMLDNSPrefetch::PrefetchLow(hostname);
}
}
nsresult
nsContentSink::SelectDocAppCache(nsIApplicationCache *aLoadApplicationCache,
nsIURI *aManifestURI,
bool aFetchedWithHTTPGetOrEquiv,
CacheSelectionAction *aAction)
{
nsresult rv;
*aAction = CACHE_SELECTION_NONE;
nsCOMPtr<nsIApplicationCacheContainer> applicationCacheDocument =
do_QueryInterface(mDocument);
NS_ASSERTION(applicationCacheDocument,
"mDocument must implement nsIApplicationCacheContainer.");
if (aLoadApplicationCache) {
nsCAutoString groupID;
rv = aLoadApplicationCache->GetGroupID(groupID);
NS_ENSURE_SUCCESS(rv, rv);
nsCOMPtr<nsIURI> groupURI;
rv = NS_NewURI(getter_AddRefs(groupURI), groupID);
NS_ENSURE_SUCCESS(rv, rv);
bool equal = false;
rv = groupURI->Equals(aManifestURI, &equal);
NS_ENSURE_SUCCESS(rv, rv);
if (!equal) {
// This is a foreign entry, force a reload to avoid loading the foreign
// entry. The entry will be marked as foreign to avoid loading it again.
*aAction = CACHE_SELECTION_RELOAD;
}
else {
// The http manifest attribute URI is equal to the manifest URI of
// the cache the document was loaded from - associate the document with
// that cache and invoke the cache update process.
#ifdef DEBUG
nsCAutoString docURISpec, clientID;
mDocumentURI->GetAsciiSpec(docURISpec);
aLoadApplicationCache->GetClientID(clientID);
SINK_TRACE(gContentSinkLogModuleInfo, SINK_TRACE_CALLS,
("Selection: assigning app cache %s to document %s", clientID.get(), docURISpec.get()));
#endif
rv = applicationCacheDocument->SetApplicationCache(aLoadApplicationCache);
NS_ENSURE_SUCCESS(rv, rv);
// Document will be added as implicit entry to the cache as part of
// the update process.
*aAction = CACHE_SELECTION_UPDATE;
}
}
else {
// The document was not loaded from an application cache
// Here we know the manifest has the same origin as the
// document. There is call to CheckMayLoad() on it above.
if (!aFetchedWithHTTPGetOrEquiv) {
// The document was not loaded using HTTP GET or equivalent
// method. The spec says to run the cache selection algorithm w/o
// the manifest specified.
*aAction = CACHE_SELECTION_RESELECT_WITHOUT_MANIFEST;
}
else {
// Always do an update in this case
*aAction = CACHE_SELECTION_UPDATE;
}
}
return NS_OK;
}
nsresult
nsContentSink::SelectDocAppCacheNoManifest(nsIApplicationCache *aLoadApplicationCache,
nsIURI **aManifestURI,
CacheSelectionAction *aAction)
{
*aManifestURI = nsnull;
*aAction = CACHE_SELECTION_NONE;
nsresult rv;
if (aLoadApplicationCache) {
// The document was loaded from an application cache, use that
// application cache as the document's application cache.
nsCOMPtr<nsIApplicationCacheContainer> applicationCacheDocument =
do_QueryInterface(mDocument);
NS_ASSERTION(applicationCacheDocument,
"mDocument must implement nsIApplicationCacheContainer.");
#ifdef DEBUG
nsCAutoString docURISpec, clientID;
mDocumentURI->GetAsciiSpec(docURISpec);
aLoadApplicationCache->GetClientID(clientID);
SINK_TRACE(gContentSinkLogModuleInfo, SINK_TRACE_CALLS,
("Selection, no manifest: assigning app cache %s to document %s", clientID.get(), docURISpec.get()));
#endif
rv = applicationCacheDocument->SetApplicationCache(aLoadApplicationCache);
NS_ENSURE_SUCCESS(rv, rv);
// Return the uri and invoke the update process for the selected
// application cache.
nsCAutoString groupID;
rv = aLoadApplicationCache->GetGroupID(groupID);
NS_ENSURE_SUCCESS(rv, rv);
rv = NS_NewURI(aManifestURI, groupID);
NS_ENSURE_SUCCESS(rv, rv);