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/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set ts=8 sts=2 et sw=2 tw=80: */
/* 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 "mozilla/dom/LocationBase.h"
#include "mozilla/NullPrincipal.h"
#include "mozilla/dom/Document.h"
#include "mozilla/dom/PolicyContainer.h"
#include "mozilla/dom/WindowContext.h"
#include "nsCOMPtr.h"
#include "nsContentUtils.h"
#include "nsDocLoader.h"
#include "nsDocShellLoadState.h"
#include "nsError.h"
#include "nsGlobalWindowInner.h"
#include "nsIClassifiedChannel.h"
#include "nsIScriptContext.h"
#include "nsIScriptSecurityManager.h"
#include "nsIWebNavigation.h"
#include "nsNetUtil.h"
namespace mozilla::dom {
static bool IncumbentGlobalHasTransientActivation() {
nsGlobalWindowInner* window = nsContentUtils::IncumbentInnerWindow();
return window && window->GetWindowContext() && window->GetWindowContext() &&
window->GetWindowContext()->HasValidTransientUserGestureActivation();
}
// https://html.spec.whatwg.org/#location-object-navigate
void LocationBase::Navigate(nsIURI* aURI, nsIPrincipal& aSubjectPrincipal,
ErrorResult& aRv,
NavigationHistoryBehavior aHistoryHandling) {
// Step 1
RefPtr<BrowsingContext> navigable = GetBrowsingContext();
if (!navigable || navigable->IsDiscarded()) {
return;
}
// Step 2-3, except the check for if document is completely loaded.
bool needsCompletelyLoadedDocument = !IncumbentGlobalHasTransientActivation();
// Make the load's referrer reflect changes to the document's URI caused by
// push/replaceState, if possible. First, get the document corresponding to
// fp. If the document's original URI (i.e. its URI before
// push/replaceState) matches the principal's URI, use the document's
// current URI as the referrer. If they don't match, use the principal's
// URI.
//
// The triggering principal for this load should be the principal of the
// incumbent document (which matches where the referrer information is
// coming from) when there is an incumbent document, and the subject
// principal otherwise. Note that the URI in the triggering principal
// may not match the referrer URI in various cases, notably including
// the cases when the incumbent document's document URI was modified
// after the document was loaded.
nsCOMPtr<nsPIDOMWindowInner> incumbent =
do_QueryInterface(mozilla::dom::GetIncumbentGlobal());
nsCOMPtr<Document> doc = incumbent ? incumbent->GetDoc() : nullptr;
// Step 4
navigable->Navigate(aURI, doc, aSubjectPrincipal, aRv, aHistoryHandling,
needsCompletelyLoadedDocument);
}
void LocationBase::SetHref(const nsACString& aHref,
nsIPrincipal& aSubjectPrincipal, ErrorResult& aRv) {
DoSetHref(aHref, aSubjectPrincipal, false, aRv);
}
void LocationBase::DoSetHref(const nsACString& aHref,
nsIPrincipal& aSubjectPrincipal, bool aReplace,
ErrorResult& aRv) {
// Get the source of the caller
nsCOMPtr<nsIURI> base = GetSourceBaseURL();
SetHrefWithBase(aHref, base, aSubjectPrincipal, aReplace, aRv);
}
void LocationBase::SetHrefWithBase(const nsACString& aHref, nsIURI* aBase,
nsIPrincipal& aSubjectPrincipal,
bool aReplace, ErrorResult& aRv) {
nsresult result;
nsCOMPtr<nsIURI> newUri;
if (Document* doc = GetEntryDocument()) {
result = NS_NewURI(getter_AddRefs(newUri), aHref,
doc->GetDocumentCharacterSet(), aBase);
} else {
result = NS_NewURI(getter_AddRefs(newUri), aHref, nullptr, aBase);
}
if (NS_FAILED(result) || !newUri) {
aRv.ThrowSyntaxError("'"_ns + aHref + "' is not a valid URL."_ns);
return;
}
/* Check with the scriptContext if it is currently processing a script tag.
* If so, this must be a <script> tag with a location.href in it.
* we want to do a replace load, in such a situation.
* In other cases, for example if a event handler or a JS timer
* had a location.href in it, we want to do a normal load,
* so that the new url will be appended to Session History.
* This solution is tricky. Hopefully it isn't going to bite
* anywhere else. This is part of solution for bug # 39938, 72197
*/
bool inScriptTag = false;
nsIScriptContext* scriptContext = nullptr;
nsCOMPtr<nsPIDOMWindowInner> win = do_QueryInterface(GetEntryGlobal());
if (win) {
scriptContext = nsGlobalWindowInner::Cast(win)->GetContextInternal();
}
if (scriptContext) {
if (scriptContext->GetProcessingScriptTag()) {
// Now check to make sure that the script is running in our window,
// since we only want to replace if the location is set by a
// <script> tag in the same window. See bug 178729.
nsCOMPtr<nsIDocShell> docShell(GetDocShell());
nsCOMPtr<nsIScriptGlobalObject> ourGlobal =
docShell ? docShell->GetScriptGlobalObject() : nullptr;
inScriptTag = (ourGlobal == scriptContext->GetGlobalObject());
}
}
NavigationHistoryBehavior historyHandling = NavigationHistoryBehavior::Auto;
if (aReplace || inScriptTag) {
historyHandling = NavigationHistoryBehavior::Replace;
}
Navigate(newUri, aSubjectPrincipal, aRv, historyHandling);
}
void LocationBase::Replace(const nsACString& aUrl,
nsIPrincipal& aSubjectPrincipal, ErrorResult& aRv) {
DoSetHref(aUrl, aSubjectPrincipal, true, aRv);
}
nsIURI* LocationBase::GetSourceBaseURL() {
Document* doc = GetEntryDocument();
// If there's no entry document, we either have no Script Entry Point or one
// that isn't a DOM Window. This doesn't generally happen with the DOM, but
// can sometimes happen with extension code in certain IPC configurations. If
// this happens, try falling back on the current document associated with the
// docshell. If that fails, just return null and hope that the caller passed
// an absolute URI.
if (!doc) {
if (nsCOMPtr<nsIDocShell> docShell = GetDocShell()) {
nsCOMPtr<nsPIDOMWindowOuter> docShellWin =
do_QueryInterface(docShell->GetScriptGlobalObject());
if (docShellWin) {
doc = docShellWin->GetDoc();
}
}
}
return doc ? doc->GetBaseURI() : nullptr;
}
} // namespace mozilla::dom
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