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gecko-dev/dom/webbrowserpersist/WebBrowserPersistLocalDocum...

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/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*-
* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
#include "WebBrowserPersistLocalDocument.h"
#include "WebBrowserPersistDocumentParent.h"
#include "mozilla/dom/Attr.h"
#include "mozilla/dom/Comment.h"
#include "mozilla/dom/Element.h"
#include "mozilla/dom/HTMLAnchorElement.h"
#include "mozilla/dom/HTMLAreaElement.h"
#include "mozilla/dom/HTMLInputElement.h"
#include "mozilla/dom/HTMLLinkElement.h"
#include "mozilla/dom/HTMLObjectElement.h"
#include "mozilla/dom/HTMLOptionElement.h"
#include "mozilla/dom/HTMLSharedElement.h"
#include "mozilla/dom/HTMLTextAreaElement.h"
#include "mozilla/dom/NodeFilterBinding.h"
#include "mozilla/dom/ProcessingInstruction.h"
#include "mozilla/dom/BrowserParent.h"
#include "mozilla/dom/TreeWalker.h"
#include "mozilla/Unused.h"
#include "nsComponentManagerUtils.h"
#include "nsContentUtils.h"
#include "nsContentCID.h"
#include "nsCycleCollectionParticipant.h"
#include "nsDOMAttributeMap.h"
#include "nsFrameLoader.h"
#include "nsGlobalWindowOuter.h"
#include "nsIComponentRegistrar.h"
#include "nsIContent.h"
#include "nsIDOMWindowUtils.h"
#include "nsIDocShell.h"
#include "mozilla/dom/Document.h"
#include "nsIDocumentEncoder.h"
#include "nsILoadContext.h"
#include "nsIProtocolHandler.h"
#include "nsISHEntry.h"
#include "nsISupportsPrimitives.h"
#include "nsIRemoteTab.h"
#include "nsIURIMutator.h"
#include "nsIWebBrowserPersist.h"
#include "nsIWebNavigation.h"
#include "nsIWebPageDescriptor.h"
#include "nsNetUtil.h"
#include "nsQueryObject.h"
namespace mozilla {
NS_IMPL_CYCLE_COLLECTING_ADDREF(WebBrowserPersistLocalDocument)
NS_IMPL_CYCLE_COLLECTING_RELEASE(WebBrowserPersistLocalDocument)
NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION(WebBrowserPersistLocalDocument)
NS_INTERFACE_MAP_ENTRY(nsIWebBrowserPersistDocument)
NS_INTERFACE_MAP_ENTRY(nsISupports)
NS_INTERFACE_MAP_END
NS_IMPL_CYCLE_COLLECTION(WebBrowserPersistLocalDocument, mDocument)
WebBrowserPersistLocalDocument::WebBrowserPersistLocalDocument(
dom::Document* aDocument)
: mDocument(aDocument), mPersistFlags(0) {
MOZ_ASSERT(mDocument);
}
WebBrowserPersistLocalDocument::~WebBrowserPersistLocalDocument() = default;
NS_IMETHODIMP
WebBrowserPersistLocalDocument::SetPersistFlags(uint32_t aFlags) {
mPersistFlags = aFlags;
return NS_OK;
}
NS_IMETHODIMP
WebBrowserPersistLocalDocument::GetPersistFlags(uint32_t* aFlags) {
*aFlags = mPersistFlags;
return NS_OK;
}
NS_IMETHODIMP
WebBrowserPersistLocalDocument::GetIsPrivate(bool* aIsPrivate) {
nsCOMPtr<nsILoadContext> privacyContext = mDocument->GetLoadContext();
*aIsPrivate = privacyContext && privacyContext->UsePrivateBrowsing();
return NS_OK;
}
NS_IMETHODIMP
WebBrowserPersistLocalDocument::GetDocumentURI(nsACString& aURISpec) {
nsCOMPtr<nsIURI> uri = mDocument->GetDocumentURI();
if (!uri) {
return NS_ERROR_UNEXPECTED;
}
return uri->GetSpec(aURISpec);
}
NS_IMETHODIMP
WebBrowserPersistLocalDocument::GetBaseURI(nsACString& aURISpec) {
nsCOMPtr<nsIURI> uri = GetBaseURI();
if (!uri) {
return NS_ERROR_UNEXPECTED;
}
return uri->GetSpec(aURISpec);
}
NS_IMETHODIMP
WebBrowserPersistLocalDocument::GetContentType(nsACString& aContentType) {
nsAutoString utf16Type;
mDocument->GetContentType(utf16Type);
CopyUTF16toUTF8(utf16Type, aContentType);
return NS_OK;
}
NS_IMETHODIMP
WebBrowserPersistLocalDocument::GetCharacterSet(nsACString& aCharSet) {
GetCharacterSet()->Name(aCharSet);
return NS_OK;
}
NS_IMETHODIMP
WebBrowserPersistLocalDocument::GetTitle(nsAString& aTitle) {
nsAutoString titleBuffer;
mDocument->GetTitle(titleBuffer);
aTitle = titleBuffer;
return NS_OK;
}
NS_IMETHODIMP
WebBrowserPersistLocalDocument::GetReferrer(nsAString& aReferrer) {
mDocument->GetReferrer(aReferrer);
return NS_OK;
}
NS_IMETHODIMP
WebBrowserPersistLocalDocument::GetContentDisposition(nsAString& aCD) {
nsCOMPtr<nsPIDOMWindowOuter> window = mDocument->GetWindow();
if (NS_WARN_IF(!window)) {
aCD.SetIsVoid(true);
return NS_OK;
}
nsCOMPtr<nsIDOMWindowUtils> utils =
nsGlobalWindowOuter::Cast(window)->WindowUtils();
nsresult rv =
utils->GetDocumentMetadata(NS_LITERAL_STRING("content-disposition"), aCD);
if (NS_WARN_IF(NS_FAILED(rv))) {
aCD.SetIsVoid(true);
}
return NS_OK;
}
NS_IMETHODIMP
WebBrowserPersistLocalDocument::GetCacheKey(uint32_t* aKey) {
*aKey = 0;
nsCOMPtr<nsISHEntry> history = GetHistory();
if (history) {
history->GetCacheKey(aKey);
}
return NS_OK;
}
NS_IMETHODIMP
WebBrowserPersistLocalDocument::GetPostData(nsIInputStream** aStream) {
nsCOMPtr<nsISHEntry> history = GetHistory();
if (!history) {
*aStream = nullptr;
return NS_OK;
}
return history->GetPostData(aStream);
}
NS_IMETHODIMP
WebBrowserPersistLocalDocument::GetPrincipal(nsIPrincipal** aPrincipal) {
nsCOMPtr<nsIPrincipal> nodePrincipal = mDocument->NodePrincipal();
nodePrincipal.forget(aPrincipal);
return NS_OK;
}
already_AddRefed<nsISHEntry> WebBrowserPersistLocalDocument::GetHistory() {
nsCOMPtr<nsPIDOMWindowOuter> window = mDocument->GetWindow();
if (NS_WARN_IF(!window)) {
return nullptr;
}
nsCOMPtr<nsIWebNavigation> webNav = do_GetInterface(window);
if (NS_WARN_IF(!webNav)) {
return nullptr;
}
nsCOMPtr<nsIWebPageDescriptor> desc = do_QueryInterface(webNav);
if (NS_WARN_IF(!desc)) {
return nullptr;
}
nsCOMPtr<nsISupports> curDesc;
nsresult rv = desc->GetCurrentDescriptor(getter_AddRefs(curDesc));
// This can fail if, e.g., the document is a Print Preview.
if (NS_FAILED(rv) || NS_WARN_IF(!curDesc)) {
return nullptr;
}
nsCOMPtr<nsISHEntry> history = do_QueryInterface(curDesc);
return history.forget();
}
NotNull<const Encoding*> WebBrowserPersistLocalDocument::GetCharacterSet()
const {
return mDocument->GetDocumentCharacterSet();
}
uint32_t WebBrowserPersistLocalDocument::GetPersistFlags() const {
return mPersistFlags;
}
already_AddRefed<nsIURI> WebBrowserPersistLocalDocument::GetBaseURI() const {
return mDocument->GetBaseURI();
}
namespace {
// Helper class for ReadResources().
class ResourceReader final : public nsIWebBrowserPersistDocumentReceiver {
public:
ResourceReader(WebBrowserPersistLocalDocument* aParent,
nsIWebBrowserPersistResourceVisitor* aVisitor);
nsresult OnWalkDOMNode(nsINode* aNode);
// This is called both to indicate the end of the document walk
// and when a subdocument is (maybe asynchronously) sent to the
// visitor. The call to EndVisit needs to happen after both of
// those have finished.
void DocumentDone(nsresult aStatus);
NS_DECL_NSIWEBBROWSERPERSISTDOCUMENTRECEIVER
NS_DECL_ISUPPORTS
private:
RefPtr<WebBrowserPersistLocalDocument> mParent;
nsCOMPtr<nsIWebBrowserPersistResourceVisitor> mVisitor;
nsCOMPtr<nsIURI> mCurrentBaseURI;
uint32_t mPersistFlags;
// The number of DocumentDone calls after which EndVisit will be
// called on the visitor. Counts the main document if it's still
// being walked and any outstanding asynchronous subdocument
// StartPersistence calls.
size_t mOutstandingDocuments;
// Collects the status parameters to DocumentDone calls.
nsresult mEndStatus;
nsresult OnWalkURI(const nsACString& aURISpec,
nsContentPolicyType aContentPolicyType);
nsresult OnWalkURI(nsIURI* aURI, nsContentPolicyType aContentPolicyType);
nsresult OnWalkAttribute(Element* aElement,
nsContentPolicyType aContentPolicyType,
const char* aAttribute,
const char* aNamespaceURI = "");
nsresult OnWalkSubframe(nsINode* aNode);
~ResourceReader();
using IWBP = nsIWebBrowserPersist;
};
NS_IMPL_ISUPPORTS(ResourceReader, nsIWebBrowserPersistDocumentReceiver)
ResourceReader::ResourceReader(WebBrowserPersistLocalDocument* aParent,
nsIWebBrowserPersistResourceVisitor* aVisitor)
: mParent(aParent),
mVisitor(aVisitor),
mCurrentBaseURI(aParent->GetBaseURI()),
mPersistFlags(aParent->GetPersistFlags()),
mOutstandingDocuments(1),
mEndStatus(NS_OK) {
MOZ_ASSERT(mCurrentBaseURI);
}
ResourceReader::~ResourceReader() { MOZ_ASSERT(mOutstandingDocuments == 0); }
void ResourceReader::DocumentDone(nsresult aStatus) {
MOZ_ASSERT(mOutstandingDocuments > 0);
if (NS_SUCCEEDED(mEndStatus)) {
mEndStatus = aStatus;
}
if (--mOutstandingDocuments == 0) {
mVisitor->EndVisit(mParent, mEndStatus);
}
}
nsresult ResourceReader::OnWalkSubframe(nsINode* aNode) {
RefPtr<nsFrameLoaderOwner> loaderOwner = do_QueryObject(aNode);
NS_ENSURE_STATE(loaderOwner);
RefPtr<nsFrameLoader> loader = loaderOwner->GetFrameLoader();
NS_ENSURE_STATE(loader);
++mOutstandingDocuments;
// Pass in 0 as the outer window ID so that we start
// persisting the root of this subframe, and not some other
// subframe child of this subframe.
ErrorResult err;
loader->StartPersistence(0, this, err);
nsresult rv = err.StealNSResult();
if (NS_FAILED(rv)) {
if (rv == NS_ERROR_NO_CONTENT) {
// Just ignore frames with no content document.
rv = NS_OK;
}
// StartPersistence won't eventually call this if it failed,
// so this does so (to keep mOutstandingDocuments correct).
DocumentDone(rv);
}
return rv;
}
NS_IMETHODIMP
ResourceReader::OnDocumentReady(nsIWebBrowserPersistDocument* aDocument) {
mVisitor->VisitDocument(mParent, aDocument);
DocumentDone(NS_OK);
return NS_OK;
}
NS_IMETHODIMP
ResourceReader::OnError(nsresult aFailure) {
DocumentDone(aFailure);
return NS_OK;
}
nsresult ResourceReader::OnWalkURI(nsIURI* aURI,
nsContentPolicyType aContentPolicyType) {
// Test if this URI should be persisted. By default
// we should assume the URI is persistable.
bool doNotPersistURI;
nsresult rv = NS_URIChainHasFlags(
aURI, nsIProtocolHandler::URI_NON_PERSISTABLE, &doNotPersistURI);
if (NS_SUCCEEDED(rv) && doNotPersistURI) {
return NS_OK;
}
nsAutoCString stringURI;
rv = aURI->GetSpec(stringURI);
NS_ENSURE_SUCCESS(rv, rv);
return mVisitor->VisitResource(mParent, stringURI, aContentPolicyType);
}
nsresult ResourceReader::OnWalkURI(const nsACString& aURISpec,
nsContentPolicyType aContentPolicyType) {
nsresult rv;
nsCOMPtr<nsIURI> uri;
rv = NS_NewURI(getter_AddRefs(uri), aURISpec, mParent->GetCharacterSet(),
mCurrentBaseURI);
if (NS_FAILED(rv)) {
// We don't want to break saving a page in case of a malformed URI.
return NS_OK;
}
return OnWalkURI(uri, aContentPolicyType);
}
static void ExtractAttribute(Element* aElement, const char* aAttribute,
const char* aNamespaceURI, nsCString& aValue) {
// Find the named URI attribute on the (element) node and store
// a reference to the URI that maps onto a local file name
RefPtr<nsDOMAttributeMap> attrMap = aElement->Attributes();
NS_ConvertASCIItoUTF16 namespaceURI(aNamespaceURI);
NS_ConvertASCIItoUTF16 attribute(aAttribute);
RefPtr<dom::Attr> attr = attrMap->GetNamedItemNS(namespaceURI, attribute);
if (attr) {
nsAutoString value;
attr->GetValue(value);
CopyUTF16toUTF8(value, aValue);
} else {
aValue.Truncate();
}
}
nsresult ResourceReader::OnWalkAttribute(Element* aElement,
nsContentPolicyType aContentPolicyType,
const char* aAttribute,
const char* aNamespaceURI) {
nsAutoCString uriSpec;
ExtractAttribute(aElement, aAttribute, aNamespaceURI, uriSpec);
if (uriSpec.IsEmpty()) {
return NS_OK;
}
return OnWalkURI(uriSpec, aContentPolicyType);
}
static nsresult GetXMLStyleSheetLink(dom::ProcessingInstruction* aPI,
nsAString& aHref) {
nsAutoString data;
aPI->GetData(data);
nsContentUtils::GetPseudoAttributeValue(data, nsGkAtoms::href, aHref);
return NS_OK;
}
nsresult ResourceReader::OnWalkDOMNode(nsINode* aNode) {
// Fixup xml-stylesheet processing instructions
if (auto nodeAsPI = dom::ProcessingInstruction::FromNode(aNode)) {
nsAutoString target;
nodeAsPI->GetTarget(target);
if (target.EqualsLiteral("xml-stylesheet")) {
nsAutoString href;
GetXMLStyleSheetLink(nodeAsPI, href);
if (!href.IsEmpty()) {
return OnWalkURI(NS_ConvertUTF16toUTF8(href),
nsIContentPolicy::TYPE_STYLESHEET);
}
}
return NS_OK;
}
// Test the node to see if it's an image, frame, iframe, css, js
if (aNode->IsHTMLElement(nsGkAtoms::img)) {
return OnWalkAttribute(aNode->AsElement(), nsIContentPolicy::TYPE_IMAGE,
"src");
}
if (aNode->IsSVGElement(nsGkAtoms::img)) {
return OnWalkAttribute(aNode->AsElement(), nsIContentPolicy::TYPE_IMAGE,
"href", "http://www.w3.org/1999/xlink");
}
if (aNode->IsAnyOfHTMLElements(nsGkAtoms::audio, nsGkAtoms::video)) {
return OnWalkAttribute(aNode->AsElement(), nsIContentPolicy::TYPE_MEDIA,
"src");
}
if (aNode->IsHTMLElement(nsGkAtoms::source)) {
return OnWalkAttribute(aNode->AsElement(), nsIContentPolicy::TYPE_MEDIA,
"src");
}
if (aNode->IsHTMLElement(nsGkAtoms::body)) {
return OnWalkAttribute(aNode->AsElement(), nsIContentPolicy::TYPE_IMAGE,
"background");
}
if (aNode->IsHTMLElement(nsGkAtoms::table)) {
return OnWalkAttribute(aNode->AsElement(), nsIContentPolicy::TYPE_IMAGE,
"background");
}
if (aNode->IsHTMLElement(nsGkAtoms::tr)) {
return OnWalkAttribute(aNode->AsElement(), nsIContentPolicy::TYPE_IMAGE,
"background");
}
if (aNode->IsAnyOfHTMLElements(nsGkAtoms::td, nsGkAtoms::th)) {
return OnWalkAttribute(aNode->AsElement(), nsIContentPolicy::TYPE_IMAGE,
"background");
}
if (aNode->IsHTMLElement(nsGkAtoms::script)) {
return OnWalkAttribute(aNode->AsElement(), nsIContentPolicy::TYPE_SCRIPT,
"src");
}
if (aNode->IsSVGElement(nsGkAtoms::script)) {
return OnWalkAttribute(aNode->AsElement(), nsIContentPolicy::TYPE_SCRIPT,
"href", "http://www.w3.org/1999/xlink");
}
if (aNode->IsHTMLElement(nsGkAtoms::embed)) {
return OnWalkAttribute(aNode->AsElement(), nsIContentPolicy::TYPE_OBJECT,
"src");
}
if (aNode->IsHTMLElement(nsGkAtoms::object)) {
return OnWalkAttribute(aNode->AsElement(), nsIContentPolicy::TYPE_OBJECT,
"data");
}
if (auto nodeAsLink = dom::HTMLLinkElement::FromNode(aNode)) {
// Test if the link has a rel value indicating it to be a stylesheet
nsAutoString linkRel;
nodeAsLink->GetRel(linkRel);
if (!linkRel.IsEmpty()) {
nsReadingIterator<char16_t> start;
nsReadingIterator<char16_t> end;
nsReadingIterator<char16_t> current;
linkRel.BeginReading(start);
linkRel.EndReading(end);
// Walk through space delimited string looking for "stylesheet"
for (current = start; current != end; ++current) {
// Ignore whitespace
if (nsCRT::IsAsciiSpace(*current)) {
continue;
}
// Grab the next space delimited word
nsReadingIterator<char16_t> startWord = current;
do {
++current;
} while (current != end && !nsCRT::IsAsciiSpace(*current));
// Store the link for fix up if it says "stylesheet"
if (Substring(startWord, current)
.LowerCaseEqualsLiteral("stylesheet")) {
OnWalkAttribute(aNode->AsElement(), nsIContentPolicy::TYPE_STYLESHEET,
"href");
return NS_OK;
}
if (current == end) {
break;
}
}
}
return NS_OK;
}
if (aNode->IsHTMLElement(nsGkAtoms::frame)) {
return OnWalkSubframe(aNode);
}
if (aNode->IsHTMLElement(nsGkAtoms::iframe) &&
!(mPersistFlags & IWBP::PERSIST_FLAGS_IGNORE_IFRAMES)) {
return OnWalkSubframe(aNode);
}
auto nodeAsInput = dom::HTMLInputElement::FromNode(aNode);
if (nodeAsInput) {
return OnWalkAttribute(aNode->AsElement(), nsIContentPolicy::TYPE_IMAGE,
"src");
}
return NS_OK;
}
// Helper class for node rewriting in writeContent().
class PersistNodeFixup final : public nsIDocumentEncoderNodeFixup {
public:
PersistNodeFixup(WebBrowserPersistLocalDocument* aParent,
nsIWebBrowserPersistURIMap* aMap, nsIURI* aTargetURI);
NS_DECL_ISUPPORTS
NS_DECL_NSIDOCUMENTENCODERNODEFIXUP
private:
virtual ~PersistNodeFixup() = default;
RefPtr<WebBrowserPersistLocalDocument> mParent;
nsClassHashtable<nsCStringHashKey, nsCString> mMap;
nsCOMPtr<nsIURI> mCurrentBaseURI;
nsCOMPtr<nsIURI> mTargetBaseURI;
bool IsFlagSet(uint32_t aFlag) const {
return mParent->GetPersistFlags() & aFlag;
}
nsresult GetNodeToFixup(nsINode* aNodeIn, nsINode** aNodeOut);
nsresult FixupURI(nsAString& aURI);
nsresult FixupAttribute(nsINode* aNode, const char* aAttribute,
const char* aNamespaceURI = "");
nsresult FixupAnchor(nsINode* aNode);
nsresult FixupXMLStyleSheetLink(dom::ProcessingInstruction* aPI,
const nsAString& aHref);
using IWBP = nsIWebBrowserPersist;
};
NS_IMPL_ISUPPORTS(PersistNodeFixup, nsIDocumentEncoderNodeFixup)
PersistNodeFixup::PersistNodeFixup(WebBrowserPersistLocalDocument* aParent,
nsIWebBrowserPersistURIMap* aMap,
nsIURI* aTargetURI)
: mParent(aParent),
mCurrentBaseURI(aParent->GetBaseURI()),
mTargetBaseURI(aTargetURI) {
if (aMap) {
uint32_t mapSize;
nsresult rv = aMap->GetNumMappedURIs(&mapSize);
MOZ_ASSERT(NS_SUCCEEDED(rv));
NS_ENSURE_SUCCESS_VOID(rv);
for (uint32_t i = 0; i < mapSize; ++i) {
nsAutoCString urlFrom;
auto* urlTo = new nsCString();
rv = aMap->GetURIMapping(i, urlFrom, *urlTo);
MOZ_ASSERT(NS_SUCCEEDED(rv));
if (NS_SUCCEEDED(rv)) {
mMap.Put(urlFrom, urlTo);
}
}
}
}
nsresult PersistNodeFixup::GetNodeToFixup(nsINode* aNodeIn,
nsINode** aNodeOut) {
// Avoid mixups in FixupNode that could leak objects; this goes
// against the usual out parameter convention, but it's a private
// method so shouldn't be a problem.
MOZ_ASSERT(!*aNodeOut);
if (!IsFlagSet(IWBP::PERSIST_FLAGS_FIXUP_ORIGINAL_DOM)) {
ErrorResult rv;
*aNodeOut = aNodeIn->CloneNode(false, rv).take();
return rv.StealNSResult();
}
NS_ADDREF(*aNodeOut = aNodeIn);
return NS_OK;
}
nsresult PersistNodeFixup::FixupURI(nsAString& aURI) {
// get the current location of the file (absolutized)
nsCOMPtr<nsIURI> uri;
nsresult rv = NS_NewURI(getter_AddRefs(uri), aURI, mParent->GetCharacterSet(),
mCurrentBaseURI);
NS_ENSURE_SUCCESS(rv, rv);
nsAutoCString spec;
rv = uri->GetSpec(spec);
NS_ENSURE_SUCCESS(rv, rv);
const nsCString* replacement = mMap.Get(spec);
if (!replacement) {
// Note that most callers ignore this "failure".
return NS_ERROR_FAILURE;
}
if (!replacement->IsEmpty()) {
aURI = NS_ConvertUTF8toUTF16(*replacement);
}
return NS_OK;
}
nsresult PersistNodeFixup::FixupAttribute(nsINode* aNode,
const char* aAttribute,
const char* aNamespaceURI) {
MOZ_ASSERT(aNode->IsElement());
dom::Element* element = aNode->AsElement();
RefPtr<nsDOMAttributeMap> attrMap = element->Attributes();
NS_ConvertASCIItoUTF16 attribute(aAttribute);
NS_ConvertASCIItoUTF16 namespaceURI(aNamespaceURI);
RefPtr<dom::Attr> attr = attrMap->GetNamedItemNS(namespaceURI, attribute);
nsresult rv = NS_OK;
if (attr) {
nsString uri;
attr->GetValue(uri);
rv = FixupURI(uri);
if (NS_SUCCEEDED(rv)) {
attr->SetValue(uri, IgnoreErrors());
}
}
return rv;
}
nsresult PersistNodeFixup::FixupAnchor(nsINode* aNode) {
if (IsFlagSet(IWBP::PERSIST_FLAGS_DONT_FIXUP_LINKS)) {
return NS_OK;
}
MOZ_ASSERT(aNode->IsElement());
dom::Element* element = aNode->AsElement();
RefPtr<nsDOMAttributeMap> attrMap = element->Attributes();
// Make all anchor links absolute so they point off onto the Internet
nsString attribute(NS_LITERAL_STRING("href"));
RefPtr<dom::Attr> attr = attrMap->GetNamedItem(attribute);
if (attr) {
nsString oldValue;
attr->GetValue(oldValue);
NS_ConvertUTF16toUTF8 oldCValue(oldValue);
// Skip empty values and self-referencing bookmarks
if (oldCValue.IsEmpty() || oldCValue.CharAt(0) == '#') {
return NS_OK;
}
// if saving file to same location, we don't need to do any fixup
bool isEqual;
if (mTargetBaseURI &&
NS_SUCCEEDED(mCurrentBaseURI->Equals(mTargetBaseURI, &isEqual)) &&
isEqual) {
return NS_OK;
}
nsCOMPtr<nsIURI> relativeURI;
relativeURI = IsFlagSet(IWBP::PERSIST_FLAGS_FIXUP_LINKS_TO_DESTINATION)
? mTargetBaseURI
: mCurrentBaseURI;
// Make a new URI to replace the current one
nsCOMPtr<nsIURI> newURI;
nsresult rv = NS_NewURI(getter_AddRefs(newURI), oldCValue,
mParent->GetCharacterSet(), relativeURI);
if (NS_SUCCEEDED(rv) && newURI) {
Unused
<< NS_MutateURI(newURI).SetUserPass(EmptyCString()).Finalize(newURI);
nsAutoCString uriSpec;
rv = newURI->GetSpec(uriSpec);
NS_ENSURE_SUCCESS(rv, rv);
attr->SetValue(NS_ConvertUTF8toUTF16(uriSpec), IgnoreErrors());
}
}
return NS_OK;
}
static void AppendXMLAttr(const nsAString& key, const nsAString& aValue,
nsAString& aBuffer) {
if (!aBuffer.IsEmpty()) {
aBuffer.Append(' ');
}
aBuffer.Append(key);
aBuffer.AppendLiteral(R"(=")");
for (size_t i = 0; i < aValue.Length(); ++i) {
switch (aValue[i]) {
case '&':
aBuffer.AppendLiteral("&amp;");
break;
case '<':
aBuffer.AppendLiteral("&lt;");
break;
case '>':
aBuffer.AppendLiteral("&gt;");
break;
case '"':
aBuffer.AppendLiteral("&quot;");
break;
default:
aBuffer.Append(aValue[i]);
break;
}
}
aBuffer.Append('"');
}
nsresult PersistNodeFixup::FixupXMLStyleSheetLink(
dom::ProcessingInstruction* aPI, const nsAString& aHref) {
NS_ENSURE_ARG_POINTER(aPI);
nsAutoString data;
aPI->GetData(data);
nsAutoString href;
nsContentUtils::GetPseudoAttributeValue(data, nsGkAtoms::href, href);
// Construct and set a new data value for the xml-stylesheet
if (!aHref.IsEmpty() && !href.IsEmpty()) {
nsAutoString alternate;
nsAutoString charset;
nsAutoString title;
nsAutoString type;
nsAutoString media;
nsContentUtils::GetPseudoAttributeValue(data, nsGkAtoms::alternate,
alternate);
nsContentUtils::GetPseudoAttributeValue(data, nsGkAtoms::charset, charset);
nsContentUtils::GetPseudoAttributeValue(data, nsGkAtoms::title, title);
nsContentUtils::GetPseudoAttributeValue(data, nsGkAtoms::type, type);
nsContentUtils::GetPseudoAttributeValue(data, nsGkAtoms::media, media);
nsAutoString newData;
AppendXMLAttr(NS_LITERAL_STRING("href"), aHref, newData);
if (!title.IsEmpty()) {
AppendXMLAttr(NS_LITERAL_STRING("title"), title, newData);
}
if (!media.IsEmpty()) {
AppendXMLAttr(NS_LITERAL_STRING("media"), media, newData);
}
if (!type.IsEmpty()) {
AppendXMLAttr(NS_LITERAL_STRING("type"), type, newData);
}
if (!charset.IsEmpty()) {
AppendXMLAttr(NS_LITERAL_STRING("charset"), charset, newData);
}
if (!alternate.IsEmpty()) {
AppendXMLAttr(NS_LITERAL_STRING("alternate"), alternate, newData);
}
aPI->SetData(newData, IgnoreErrors());
}
return NS_OK;
}
NS_IMETHODIMP
PersistNodeFixup::FixupNode(nsINode* aNodeIn, bool* aSerializeCloneKids,
nsINode** aNodeOut) {
*aNodeOut = nullptr;
*aSerializeCloneKids = false;
uint16_t type = aNodeIn->NodeType();
if (type != nsINode::ELEMENT_NODE &&
type != nsINode::PROCESSING_INSTRUCTION_NODE) {
return NS_OK;
}
MOZ_ASSERT(aNodeIn->IsContent());
// Fixup xml-stylesheet processing instructions
if (auto nodeAsPI = dom::ProcessingInstruction::FromNode(aNodeIn)) {
nsAutoString target;
nodeAsPI->GetTarget(target);
if (target.EqualsLiteral("xml-stylesheet")) {
nsresult rv = GetNodeToFixup(aNodeIn, aNodeOut);
if (NS_SUCCEEDED(rv) && *aNodeOut) {
MOZ_ASSERT((*aNodeOut)->IsProcessingInstruction());
auto nodeAsPI = static_cast<dom::ProcessingInstruction*>(*aNodeOut);
nsAutoString href;
GetXMLStyleSheetLink(nodeAsPI, href);
if (!href.IsEmpty()) {
FixupURI(href);
FixupXMLStyleSheetLink(nodeAsPI, href);
}
}
}
return NS_OK;
}
nsCOMPtr<nsIContent> content = do_QueryInterface(aNodeIn);
if (!content) {
return NS_OK;
}
// BASE elements are replaced by a comment so relative links are not hosed.
if (!IsFlagSet(IWBP::PERSIST_FLAGS_NO_BASE_TAG_MODIFICATIONS) &&
content->IsHTMLElement(nsGkAtoms::base)) {
// Base uses HTMLSharedElement, which would be awkward to implement
// FromContent on, since it represents multiple elements. Since we've
// already checked IsHTMLElement here, just cast as we were doing.
auto* base = static_cast<dom::HTMLSharedElement*>(content.get());
dom::Document* ownerDoc = base->OwnerDoc();
nsAutoString href;
base->GetHref(href); // Doesn't matter if this fails
nsAutoString commentText;
commentText.AssignLiteral(" base ");
if (!href.IsEmpty()) {
commentText +=
NS_LITERAL_STRING("href=\"") + href + NS_LITERAL_STRING("\" ");
}
*aNodeOut = ownerDoc->CreateComment(commentText).take();
return NS_OK;
}
// Fix up href and file links in the elements
RefPtr<dom::HTMLAnchorElement> nodeAsAnchor =
dom::HTMLAnchorElement::FromNode(content);
if (nodeAsAnchor) {
nsresult rv = GetNodeToFixup(aNodeIn, aNodeOut);
if (NS_SUCCEEDED(rv) && *aNodeOut) {
FixupAnchor(*aNodeOut);
}
return rv;
}
RefPtr<dom::HTMLAreaElement> nodeAsArea =
dom::HTMLAreaElement::FromNode(content);
if (nodeAsArea) {
nsresult rv = GetNodeToFixup(aNodeIn, aNodeOut);
if (NS_SUCCEEDED(rv) && *aNodeOut) {
FixupAnchor(*aNodeOut);
}
return rv;
}
if (content->IsHTMLElement(nsGkAtoms::body)) {
nsresult rv = GetNodeToFixup(aNodeIn, aNodeOut);
if (NS_SUCCEEDED(rv) && *aNodeOut) {
FixupAttribute(*aNodeOut, "background");
}
return rv;
}
if (content->IsHTMLElement(nsGkAtoms::table)) {
nsresult rv = GetNodeToFixup(aNodeIn, aNodeOut);
if (NS_SUCCEEDED(rv) && *aNodeOut) {
FixupAttribute(*aNodeOut, "background");
}
return rv;
}
if (content->IsHTMLElement(nsGkAtoms::tr)) {
nsresult rv = GetNodeToFixup(aNodeIn, aNodeOut);
if (NS_SUCCEEDED(rv) && *aNodeOut) {
FixupAttribute(*aNodeOut, "background");
}
return rv;
}
if (content->IsAnyOfHTMLElements(nsGkAtoms::td, nsGkAtoms::th)) {
nsresult rv = GetNodeToFixup(aNodeIn, aNodeOut);
if (NS_SUCCEEDED(rv) && *aNodeOut) {
FixupAttribute(*aNodeOut, "background");
}
return rv;
}
if (content->IsHTMLElement(nsGkAtoms::img)) {
nsresult rv = GetNodeToFixup(aNodeIn, aNodeOut);
if (NS_SUCCEEDED(rv) && *aNodeOut) {
// Disable image loads
nsCOMPtr<nsIImageLoadingContent> imgCon = do_QueryInterface(*aNodeOut);
if (imgCon) {
imgCon->SetLoadingEnabled(false);
}
FixupAnchor(*aNodeOut);
FixupAttribute(*aNodeOut, "src");
}
return rv;
}
if (content->IsAnyOfHTMLElements(nsGkAtoms::audio, nsGkAtoms::video)) {
nsresult rv = GetNodeToFixup(aNodeIn, aNodeOut);
if (NS_SUCCEEDED(rv) && *aNodeOut) {
FixupAttribute(*aNodeOut, "src");
}
return rv;
}
if (content->IsHTMLElement(nsGkAtoms::source)) {
nsresult rv = GetNodeToFixup(aNodeIn, aNodeOut);
if (NS_SUCCEEDED(rv) && *aNodeOut) {
FixupAttribute(*aNodeOut, "src");
}
return rv;
}
if (content->IsSVGElement(nsGkAtoms::img)) {
nsresult rv = GetNodeToFixup(aNodeIn, aNodeOut);
if (NS_SUCCEEDED(rv) && *aNodeOut) {
// Disable image loads
nsCOMPtr<nsIImageLoadingContent> imgCon = do_QueryInterface(*aNodeOut);
if (imgCon) imgCon->SetLoadingEnabled(false);
// FixupAnchor(*aNodeOut); // XXXjwatt: is this line needed?
FixupAttribute(*aNodeOut, "href", "http://www.w3.org/1999/xlink");
}
return rv;
}
if (content->IsHTMLElement(nsGkAtoms::script)) {
nsresult rv = GetNodeToFixup(aNodeIn, aNodeOut);
if (NS_SUCCEEDED(rv) && *aNodeOut) {
FixupAttribute(*aNodeOut, "src");
}
return rv;
}
if (content->IsSVGElement(nsGkAtoms::script)) {
nsresult rv = GetNodeToFixup(aNodeIn, aNodeOut);
if (NS_SUCCEEDED(rv) && *aNodeOut) {
FixupAttribute(*aNodeOut, "href", "http://www.w3.org/1999/xlink");
}
return rv;
}
if (content->IsHTMLElement(nsGkAtoms::embed)) {
nsresult rv = GetNodeToFixup(aNodeIn, aNodeOut);
if (NS_SUCCEEDED(rv) && *aNodeOut) {
FixupAttribute(*aNodeOut, "src");
}
return rv;
}
if (content->IsHTMLElement(nsGkAtoms::object)) {
nsresult rv = GetNodeToFixup(aNodeIn, aNodeOut);
if (NS_SUCCEEDED(rv) && *aNodeOut) {
FixupAttribute(*aNodeOut, "data");
}
return rv;
}
if (content->IsHTMLElement(nsGkAtoms::link)) {
nsresult rv = GetNodeToFixup(aNodeIn, aNodeOut);
if (NS_SUCCEEDED(rv) && *aNodeOut) {
// First see if the link represents linked content
rv = FixupAttribute(*aNodeOut, "href");
if (NS_FAILED(rv)) {
// Perhaps this link is actually an anchor to related content
FixupAnchor(*aNodeOut);
}
// TODO if "type" attribute == "text/css"
// fixup stylesheet
}
return rv;
}
if (content->IsHTMLElement(nsGkAtoms::frame)) {
nsresult rv = GetNodeToFixup(aNodeIn, aNodeOut);
if (NS_SUCCEEDED(rv) && *aNodeOut) {
FixupAttribute(*aNodeOut, "src");
}
return rv;
}
if (content->IsHTMLElement(nsGkAtoms::iframe)) {
nsresult rv = GetNodeToFixup(aNodeIn, aNodeOut);
if (NS_SUCCEEDED(rv) && *aNodeOut) {
FixupAttribute(*aNodeOut, "src");
}
return rv;
}
RefPtr<dom::HTMLInputElement> nodeAsInput =
dom::HTMLInputElement::FromNodeOrNull(content);
if (nodeAsInput) {
nsresult rv = GetNodeToFixup(aNodeIn, aNodeOut);
if (NS_SUCCEEDED(rv) && *aNodeOut) {
// Disable image loads
nsCOMPtr<nsIImageLoadingContent> imgCon = do_QueryInterface(*aNodeOut);
if (imgCon) {
imgCon->SetLoadingEnabled(false);
}
FixupAttribute(*aNodeOut, "src");
nsAutoString valueStr;
NS_NAMED_LITERAL_STRING(valueAttr, "value");
// Update element node attributes with user-entered form state
RefPtr<dom::HTMLInputElement> outElt =
dom::HTMLInputElement::FromNode((*aNodeOut)->AsContent());
nsCOMPtr<nsIFormControl> formControl = do_QueryInterface(*aNodeOut);
switch (formControl->ControlType()) {
case NS_FORM_INPUT_EMAIL:
case NS_FORM_INPUT_SEARCH:
case NS_FORM_INPUT_TEXT:
case NS_FORM_INPUT_TEL:
case NS_FORM_INPUT_URL:
case NS_FORM_INPUT_NUMBER:
case NS_FORM_INPUT_RANGE:
case NS_FORM_INPUT_DATE:
case NS_FORM_INPUT_TIME:
case NS_FORM_INPUT_COLOR:
nodeAsInput->GetValue(valueStr, dom::CallerType::System);
// Avoid superfluous value="" serialization
if (valueStr.IsEmpty()) {
outElt->RemoveAttribute(valueAttr, IgnoreErrors());
} else {
outElt->SetAttribute(valueAttr, valueStr, IgnoreErrors());
}
break;
case NS_FORM_INPUT_CHECKBOX:
case NS_FORM_INPUT_RADIO: {
bool checked = nodeAsInput->Checked();
outElt->SetDefaultChecked(checked, IgnoreErrors());
} break;
default:
break;
}
}
return rv;
}
dom::HTMLTextAreaElement* nodeAsTextArea =
dom::HTMLTextAreaElement::FromNode(content);
if (nodeAsTextArea) {
nsresult rv = GetNodeToFixup(aNodeIn, aNodeOut);
if (NS_SUCCEEDED(rv) && *aNodeOut) {
// Tell the document encoder to serialize the text child we create below
*aSerializeCloneKids = true;
nsAutoString valueStr;
nodeAsTextArea->GetValue(valueStr);
(*aNodeOut)->SetTextContent(valueStr, IgnoreErrors());
}
return rv;
}
dom::HTMLOptionElement* nodeAsOption =
dom::HTMLOptionElement::FromNode(content);
if (nodeAsOption) {
nsresult rv = GetNodeToFixup(aNodeIn, aNodeOut);
if (NS_SUCCEEDED(rv) && *aNodeOut) {
dom::HTMLOptionElement* outElt =
dom::HTMLOptionElement::FromNode((*aNodeOut)->AsContent());
bool selected = nodeAsOption->Selected();
outElt->SetDefaultSelected(selected, IgnoreErrors());
}
return rv;
}
return NS_OK;
}
} // unnamed namespace
NS_IMETHODIMP
WebBrowserPersistLocalDocument::ReadResources(
nsIWebBrowserPersistResourceVisitor* aVisitor) {
nsresult rv = NS_OK;
nsCOMPtr<nsIWebBrowserPersistResourceVisitor> visitor = aVisitor;
NS_ENSURE_TRUE(mDocument, NS_ERROR_FAILURE);
ErrorResult err;
RefPtr<dom::TreeWalker> walker = mDocument->CreateTreeWalker(
*mDocument,
dom::NodeFilter_Binding::SHOW_ELEMENT |
dom::NodeFilter_Binding::SHOW_DOCUMENT |
dom::NodeFilter_Binding::SHOW_PROCESSING_INSTRUCTION,
nullptr, err);
if (NS_WARN_IF(err.Failed())) {
return err.StealNSResult();
}
MOZ_ASSERT(walker);
RefPtr<ResourceReader> reader = new ResourceReader(this, aVisitor);
nsCOMPtr<nsINode> currentNode = walker->CurrentNode();
do {
rv = reader->OnWalkDOMNode(currentNode);
if (NS_WARN_IF(NS_FAILED(rv))) {
break;
}
ErrorResult err;
currentNode = walker->NextNode(err);
if (NS_WARN_IF(err.Failed())) {
err.SuppressException();
break;
}
} while (currentNode);
reader->DocumentDone(rv);
// If NS_FAILED(rv), it was / will be reported by an EndVisit call
// via DocumentDone. This method must return a failure if and
// only if visitor won't be invoked.
return NS_OK;
}
static uint32_t ConvertEncoderFlags(uint32_t aEncoderFlags) {
uint32_t encoderFlags = 0;
if (aEncoderFlags & nsIWebBrowserPersist::ENCODE_FLAGS_SELECTION_ONLY)
encoderFlags |= nsIDocumentEncoder::OutputSelectionOnly;
if (aEncoderFlags & nsIWebBrowserPersist::ENCODE_FLAGS_FORMATTED)
encoderFlags |= nsIDocumentEncoder::OutputFormatted;
if (aEncoderFlags & nsIWebBrowserPersist::ENCODE_FLAGS_RAW)
encoderFlags |= nsIDocumentEncoder::OutputRaw;
if (aEncoderFlags & nsIWebBrowserPersist::ENCODE_FLAGS_BODY_ONLY)
encoderFlags |= nsIDocumentEncoder::OutputBodyOnly;
if (aEncoderFlags & nsIWebBrowserPersist::ENCODE_FLAGS_PREFORMATTED)
encoderFlags |= nsIDocumentEncoder::OutputPreformatted;
if (aEncoderFlags & nsIWebBrowserPersist::ENCODE_FLAGS_WRAP)
encoderFlags |= nsIDocumentEncoder::OutputWrap;
if (aEncoderFlags & nsIWebBrowserPersist::ENCODE_FLAGS_FORMAT_FLOWED)
encoderFlags |= nsIDocumentEncoder::OutputFormatFlowed;
if (aEncoderFlags & nsIWebBrowserPersist::ENCODE_FLAGS_ABSOLUTE_LINKS)
encoderFlags |= nsIDocumentEncoder::OutputAbsoluteLinks;
if (aEncoderFlags & nsIWebBrowserPersist::ENCODE_FLAGS_ENCODE_BASIC_ENTITIES)
encoderFlags |= nsIDocumentEncoder::OutputEncodeBasicEntities;
if (aEncoderFlags & nsIWebBrowserPersist::ENCODE_FLAGS_CR_LINEBREAKS)
encoderFlags |= nsIDocumentEncoder::OutputCRLineBreak;
if (aEncoderFlags & nsIWebBrowserPersist::ENCODE_FLAGS_LF_LINEBREAKS)
encoderFlags |= nsIDocumentEncoder::OutputLFLineBreak;
if (aEncoderFlags & nsIWebBrowserPersist::ENCODE_FLAGS_NOSCRIPT_CONTENT)
encoderFlags |= nsIDocumentEncoder::OutputNoScriptContent;
if (aEncoderFlags & nsIWebBrowserPersist::ENCODE_FLAGS_NOFRAMES_CONTENT)
encoderFlags |= nsIDocumentEncoder::OutputNoFramesContent;
return encoderFlags;
}
static bool ContentTypeEncoderExists(const nsACString& aType) {
return do_getDocumentTypeSupportedForEncoding(
PromiseFlatCString(aType).get());
}
void WebBrowserPersistLocalDocument::DecideContentType(
nsACString& aContentType) {
if (aContentType.IsEmpty()) {
if (NS_WARN_IF(NS_FAILED(GetContentType(aContentType)))) {
aContentType.Truncate();
}
}
if (!aContentType.IsEmpty() && !ContentTypeEncoderExists(aContentType)) {
aContentType.Truncate();
}
if (aContentType.IsEmpty()) {
aContentType.AssignLiteral("text/html");
}
}
nsresult WebBrowserPersistLocalDocument::GetDocEncoder(
const nsACString& aContentType, uint32_t aEncoderFlags,
nsIDocumentEncoder** aEncoder) {
nsCOMPtr<nsIDocumentEncoder> encoder =
do_createDocumentEncoder(PromiseFlatCString(aContentType).get());
NS_ENSURE_TRUE(encoder, NS_ERROR_FAILURE);
nsresult rv =
encoder->NativeInit(mDocument, NS_ConvertASCIItoUTF16(aContentType),
ConvertEncoderFlags(aEncoderFlags));
NS_ENSURE_SUCCESS(rv, NS_ERROR_FAILURE);
nsAutoCString charSet;
rv = GetCharacterSet(charSet);
NS_ENSURE_SUCCESS(rv, NS_ERROR_FAILURE);
rv = encoder->SetCharset(charSet);
NS_ENSURE_SUCCESS(rv, NS_ERROR_FAILURE);
encoder.forget(aEncoder);
return NS_OK;
}
NS_IMETHODIMP
WebBrowserPersistLocalDocument::WriteContent(
nsIOutputStream* aStream, nsIWebBrowserPersistURIMap* aMap,
const nsACString& aRequestedContentType, uint32_t aEncoderFlags,
uint32_t aWrapColumn, nsIWebBrowserPersistWriteCompletion* aCompletion) {
NS_ENSURE_ARG_POINTER(aStream);
NS_ENSURE_ARG_POINTER(aCompletion);
nsAutoCString contentType(aRequestedContentType);
DecideContentType(contentType);
nsCOMPtr<nsIDocumentEncoder> encoder;
nsresult rv =
GetDocEncoder(contentType, aEncoderFlags, getter_AddRefs(encoder));
NS_ENSURE_SUCCESS(rv, rv);
if (aWrapColumn != 0 &&
(aEncoderFlags & nsIWebBrowserPersist::ENCODE_FLAGS_WRAP)) {
encoder->SetWrapColumn(aWrapColumn);
}
nsCOMPtr<nsIURI> targetURI;
if (aMap) {
nsAutoCString targetURISpec;
rv = aMap->GetTargetBaseURI(targetURISpec);
if (NS_SUCCEEDED(rv) && !targetURISpec.IsEmpty()) {
rv = NS_NewURI(getter_AddRefs(targetURI), targetURISpec,
/* charset: */ nullptr, /* base: */ nullptr);
NS_ENSURE_SUCCESS(rv, NS_ERROR_UNEXPECTED);
} else if (mPersistFlags &
nsIWebBrowserPersist::PERSIST_FLAGS_FIXUP_LINKS_TO_DESTINATION) {
return NS_ERROR_UNEXPECTED;
}
}
rv = encoder->SetNodeFixup(new PersistNodeFixup(this, aMap, targetURI));
NS_ENSURE_SUCCESS(rv, NS_ERROR_FAILURE);
rv = encoder->EncodeToStream(aStream);
aCompletion->OnFinish(this, aStream, contentType, rv);
return NS_OK;
}
} // namespace mozilla
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