import FIREFOX_52_6_0esr_RELEASE from mozilla-esr52 hg repo

dom/base/Location.cpp

@@ -0,0 +1,941 @@
+/* -*- 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 "Location.h"
+#include "nsIScriptSecurityManager.h"
+#include "nsIScriptObjectPrincipal.h"
+#include "nsIScriptContext.h"
+#include "nsIDocShell.h"
+#include "nsIDocShellLoadInfo.h"
+#include "nsIWebNavigation.h"
+#include "nsCDefaultURIFixup.h"
+#include "nsIURIFixup.h"
+#include "nsIURL.h"
+#include "nsIJARURI.h"
+#include "nsNetUtil.h"
+#include "nsCOMPtr.h"
+#include "nsEscape.h"
+#include "nsIDOMWindow.h"
+#include "nsIDocument.h"
+#include "nsIPresShell.h"
+#include "nsPresContext.h"
+#include "nsError.h"
+#include "nsDOMClassInfoID.h"
+#include "nsReadableUtils.h"
+#include "nsITextToSubURI.h"
+#include "nsJSUtils.h"
+#include "nsContentUtils.h"
+#include "nsGlobalWindow.h"
+#include "mozilla/Likely.h"
+#include "nsCycleCollectionParticipant.h"
+#include "nsNullPrincipal.h"
+#include "ScriptSettings.h"
+#include "mozilla/dom/LocationBinding.h"
+
+namespace mozilla {
+namespace dom {
+
+static nsresult
+GetDocumentCharacterSetForURI(const nsAString& aHref, nsACString& aCharset)
+{
+  aCharset.Truncate();
+
+  if (nsIDocument* doc = GetEntryDocument()) {
+    aCharset = doc->GetDocumentCharacterSet();
+  }
+
+  return NS_OK;
+}
+
+Location::Location(nsPIDOMWindowInner* aWindow, nsIDocShell *aDocShell)
+  : mInnerWindow(aWindow)
+{
+  MOZ_ASSERT(aDocShell);
+  MOZ_ASSERT(mInnerWindow->IsInnerWindow());
+
+  mDocShell = do_GetWeakReference(aDocShell);
+}
+
+Location::~Location()
+{
+}
+
+// QueryInterface implementation for Location
+NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION(Location)
+  NS_WRAPPERCACHE_INTERFACE_MAP_ENTRY
+  NS_INTERFACE_MAP_ENTRY(nsIDOMLocation)
+  NS_INTERFACE_MAP_ENTRY_AMBIGUOUS(nsISupports, nsIDOMLocation)
+NS_INTERFACE_MAP_END
+
+NS_IMPL_CYCLE_COLLECTION_CLASS(Location)
+
+NS_IMPL_CYCLE_COLLECTION_UNLINK_BEGIN(Location)
+  NS_IMPL_CYCLE_COLLECTION_UNLINK(mInnerWindow);
+  NS_IMPL_CYCLE_COLLECTION_UNLINK_PRESERVED_WRAPPER
+NS_IMPL_CYCLE_COLLECTION_UNLINK_END
+
+NS_IMPL_CYCLE_COLLECTION_TRAVERSE_BEGIN(Location)
+  NS_IMPL_CYCLE_COLLECTION_TRAVERSE(mInnerWindow)
+  NS_IMPL_CYCLE_COLLECTION_TRAVERSE_SCRIPT_OBJECTS
+NS_IMPL_CYCLE_COLLECTION_TRAVERSE_END
+
+NS_IMPL_CYCLE_COLLECTION_TRACE_WRAPPERCACHE(Location)
+
+NS_IMPL_CYCLE_COLLECTING_ADDREF(Location)
+NS_IMPL_CYCLE_COLLECTING_RELEASE(Location)
+
+void
+Location::SetDocShell(nsIDocShell *aDocShell)
+{
+   mDocShell = do_GetWeakReference(aDocShell);
+}
+
+nsIDocShell *
+Location::GetDocShell()
+{
+  nsCOMPtr<nsIDocShell> docshell(do_QueryReferent(mDocShell));
+  return docshell;
+}
+
+nsresult
+Location::CheckURL(nsIURI* aURI, nsIDocShellLoadInfo** aLoadInfo)
+{
+  *aLoadInfo = nullptr;
+
+  nsCOMPtr<nsIDocShell> docShell(do_QueryReferent(mDocShell));
+  NS_ENSURE_TRUE(docShell, NS_ERROR_NOT_AVAILABLE);
+
+  nsCOMPtr<nsIPrincipal> triggeringPrincipal;
+  nsCOMPtr<nsIURI> sourceURI;
+  net::ReferrerPolicy referrerPolicy = net::RP_Default;
+
+  if (JSContext *cx = nsContentUtils::GetCurrentJSContext()) {
+    // No cx means that there's no JS running, or at least no JS that
+    // was run through code that properly pushed a context onto the
+    // context stack (as all code that runs JS off of web pages
+    // does). We won't bother with security checks in this case, but
+    // we need to create the loadinfo etc.
+
+    // Get security manager.
+    nsIScriptSecurityManager* ssm = nsContentUtils::GetSecurityManager();
+    NS_ENSURE_STATE(ssm);
+
+    // Check to see if URI is allowed.
+    nsresult rv = ssm->CheckLoadURIFromScript(cx, aURI);
+    NS_ENSURE_SUCCESS(rv, rv);
+
+    // 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<nsIDocument> doc = incumbent ? incumbent->GetDoc() : nullptr;
+
+    if (doc) {
+      nsCOMPtr<nsIURI> docOriginalURI, docCurrentURI, principalURI;
+      docOriginalURI = doc->GetOriginalURI();
+      docCurrentURI = doc->GetDocumentURI();
+      rv = doc->NodePrincipal()->GetURI(getter_AddRefs(principalURI));
+      NS_ENSURE_SUCCESS(rv, rv);
+
+      triggeringPrincipal = doc->NodePrincipal();
+      referrerPolicy = doc->GetReferrerPolicy();
+
+      bool urisEqual = false;
+      if (docOriginalURI && docCurrentURI && principalURI) {
+        principalURI->Equals(docOriginalURI, &urisEqual);
+      }
+      if (urisEqual) {
+        sourceURI = docCurrentURI;
+      }
+      else {
+        // Use principalURI as long as it is not an nsNullPrincipalURI.  We
+        // could add a method such as GetReferrerURI to principals to make this
+        // cleaner, but given that we need to start using Source Browsing
+        // Context for referrer (see Bug 960639) this may be wasted effort at
+        // this stage.
+        if (principalURI) {
+          bool isNullPrincipalScheme;
+          rv = principalURI->SchemeIs(NS_NULLPRINCIPAL_SCHEME,
+                                     &isNullPrincipalScheme);
+          if (NS_SUCCEEDED(rv) && !isNullPrincipalScheme) {
+            sourceURI = principalURI;
+          }
+        }
+      }
+    }
+    else {
+      // No document; determine triggeringPrincipal by quering the
+      // subjectPrincipal, wich is the principal of the current JS
+      // compartment, or a null principal in case there is no
+      // compartment yet.
+      triggeringPrincipal = nsContentUtils::SubjectPrincipal();
+    }
+  }
+
+  // Create load info
+  nsCOMPtr<nsIDocShellLoadInfo> loadInfo;
+  docShell->CreateLoadInfo(getter_AddRefs(loadInfo));
+  NS_ENSURE_TRUE(loadInfo, NS_ERROR_FAILURE);
+
+  loadInfo->SetTriggeringPrincipal(triggeringPrincipal);
+
+  if (sourceURI) {
+    loadInfo->SetReferrer(sourceURI);
+    loadInfo->SetReferrerPolicy(referrerPolicy);
+  }
+
+  loadInfo.swap(*aLoadInfo);
+
+  return NS_OK;
+}
+
+nsresult
+Location::GetURI(nsIURI** aURI, bool aGetInnermostURI)
+{
+  *aURI = nullptr;
+
+  nsresult rv;
+  nsCOMPtr<nsIDocShell> docShell(do_QueryReferent(mDocShell));
+  nsCOMPtr<nsIWebNavigation> webNav(do_QueryInterface(docShell, &rv));
+  if (NS_FAILED(rv)) {
+    return rv;
+  }
+
+  nsCOMPtr<nsIURI> uri;
+  rv = webNav->GetCurrentURI(getter_AddRefs(uri));
+  NS_ENSURE_SUCCESS(rv, rv);
+
+  // It is valid for docshell to return a null URI. Don't try to fixup
+  // if this happens.
+  if (!uri) {
+    return NS_OK;
+  }
+
+  if (aGetInnermostURI) {
+    nsCOMPtr<nsIJARURI> jarURI(do_QueryInterface(uri));
+    while (jarURI) {
+      jarURI->GetJARFile(getter_AddRefs(uri));
+      jarURI = do_QueryInterface(uri);
+    }
+  }
+
+  NS_ASSERTION(uri, "nsJARURI screwed up?");
+
+  nsCOMPtr<nsIURIFixup> urifixup(do_GetService(NS_URIFIXUP_CONTRACTID, &rv));
+  NS_ENSURE_SUCCESS(rv, rv);
+
+  return urifixup->CreateExposableURI(uri, aURI);
+}
+
+nsresult
+Location::GetWritableURI(nsIURI** aURI, const nsACString* aNewRef)
+{
+  *aURI = nullptr;
+
+  nsCOMPtr<nsIURI> uri;
+
+  nsresult rv = GetURI(getter_AddRefs(uri));
+  if (NS_FAILED(rv) || !uri) {
+    return rv;
+  }
+
+  if (!aNewRef) {
+    return uri->Clone(aURI);
+  }
+
+  return uri->CloneWithNewRef(*aNewRef, aURI);
+}
+
+nsresult
+Location::SetURI(nsIURI* aURI, bool aReplace)
+{
+  nsCOMPtr<nsIDocShell> docShell(do_QueryReferent(mDocShell));
+  if (docShell) {
+    nsCOMPtr<nsIDocShellLoadInfo> loadInfo;
+
+    if(NS_FAILED(CheckURL(aURI, getter_AddRefs(loadInfo))))
+      return NS_ERROR_FAILURE;
+
+    if (aReplace) {
+      loadInfo->SetLoadType(nsIDocShellLoadInfo::loadStopContentAndReplace);
+    } else {
+      loadInfo->SetLoadType(nsIDocShellLoadInfo::loadStopContent);
+    }
+
+    // Get the incumbent script's browsing context to set as source.
+    nsCOMPtr<nsPIDOMWindowInner> sourceWindow =
+      do_QueryInterface(mozilla::dom::GetIncumbentGlobal());
+    if (sourceWindow) {
+      loadInfo->SetSourceDocShell(sourceWindow->GetDocShell());
+    }
+
+    return docShell->LoadURI(aURI, loadInfo,
+                             nsIWebNavigation::LOAD_FLAGS_NONE, true);
+  }
+
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+Location::GetHash(nsAString& aHash)
+{
+  aHash.SetLength(0);
+
+  nsCOMPtr<nsIURI> uri;
+  nsresult rv = GetURI(getter_AddRefs(uri));
+  if (NS_FAILED(rv) || !uri) {
+    return rv;
+  }
+
+  nsAutoCString ref;
+  nsAutoString unicodeRef;
+
+  rv = uri->GetRef(ref);
+
+  if (nsContentUtils::GettersDecodeURLHash()) {
+    if (NS_SUCCEEDED(rv)) {
+      nsCOMPtr<nsITextToSubURI> textToSubURI(
+          do_GetService(NS_ITEXTTOSUBURI_CONTRACTID, &rv));
+
+      if (NS_SUCCEEDED(rv)) {
+        nsAutoCString charset;
+        uri->GetOriginCharset(charset);
+
+        rv = textToSubURI->UnEscapeURIForUI(charset, ref, unicodeRef);
+      }
+
+      if (NS_FAILED(rv)) {
+        // Oh, well.  No intl here!
+        NS_UnescapeURL(ref);
+        CopyASCIItoUTF16(ref, unicodeRef);
+        rv = NS_OK;
+      }
+    }
+
+    if (NS_SUCCEEDED(rv) && !unicodeRef.IsEmpty()) {
+      aHash.Assign(char16_t('#'));
+      aHash.Append(unicodeRef);
+    }
+  } else { // URL Hash should simply return the value of the Ref segment
+    if (NS_SUCCEEDED(rv) && !ref.IsEmpty()) {
+      aHash.Assign(char16_t('#'));
+      AppendUTF8toUTF16(ref, aHash);
+    }
+  }
+
+  if (aHash == mCachedHash) {
+    // Work around ShareThis stupidly polling location.hash every
+    // 5ms all the time by handing out the same exact string buffer
+    // we handed out last time.
+    aHash = mCachedHash;
+  } else {
+    mCachedHash = aHash;
+  }
+
+  return rv;
+}
+
+NS_IMETHODIMP
+Location::SetHash(const nsAString& aHash)
+{
+  NS_ConvertUTF16toUTF8 hash(aHash);
+  if (hash.IsEmpty() || hash.First() != char16_t('#')) {
+    hash.Insert(char16_t('#'), 0);
+  }
+  nsCOMPtr<nsIURI> uri;
+  nsresult rv = GetWritableURI(getter_AddRefs(uri), &hash);
+  if (NS_FAILED(rv) || !uri) {
+    return rv;
+  }
+
+  return SetURI(uri);
+}
+
+NS_IMETHODIMP
+Location::GetHost(nsAString& aHost)
+{
+  aHost.Truncate();
+
+  nsCOMPtr<nsIURI> uri;
+  nsresult result;
+
+  result = GetURI(getter_AddRefs(uri), true);
+
+  if (uri) {
+    nsAutoCString hostport;
+
+    result = uri->GetHostPort(hostport);
+
+    if (NS_SUCCEEDED(result)) {
+      AppendUTF8toUTF16(hostport, aHost);
+    }
+  }
+
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+Location::SetHost(const nsAString& aHost)
+{
+  nsCOMPtr<nsIURI> uri;
+  nsresult rv = GetWritableURI(getter_AddRefs(uri));
+  if (NS_WARN_IF(NS_FAILED(rv) || !uri)) {
+    return rv;
+  }
+
+  rv = uri->SetHostPort(NS_ConvertUTF16toUTF8(aHost));
+  if (NS_WARN_IF(NS_FAILED(rv))) {
+    return rv;
+  }
+
+  return SetURI(uri);
+}
+
+NS_IMETHODIMP
+Location::GetHostname(nsAString& aHostname)
+{
+  aHostname.Truncate();
+
+  nsCOMPtr<nsIURI> uri;
+  GetURI(getter_AddRefs(uri), true);
+  if (uri) {
+    nsContentUtils::GetHostOrIPv6WithBrackets(uri, aHostname);
+  }
+
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+Location::SetHostname(const nsAString& aHostname)
+{
+  nsCOMPtr<nsIURI> uri;
+  nsresult rv = GetWritableURI(getter_AddRefs(uri));
+  if (NS_WARN_IF(NS_FAILED(rv) || !uri)) {
+    return rv;
+  }
+
+  rv = uri->SetHost(NS_ConvertUTF16toUTF8(aHostname));
+  if (NS_WARN_IF(NS_FAILED(rv))) {
+    return rv;
+  }
+
+  return SetURI(uri);
+}
+
+NS_IMETHODIMP
+Location::GetHref(nsAString& aHref)
+{
+  aHref.Truncate();
+
+  nsCOMPtr<nsIURI> uri;
+  nsresult result;
+
+  result = GetURI(getter_AddRefs(uri));
+
+  if (uri) {
+    nsAutoCString uriString;
+
+    result = uri->GetSpec(uriString);
+
+    if (NS_SUCCEEDED(result)) {
+      AppendUTF8toUTF16(uriString, aHref);
+    }
+  }
+
+  return result;
+}
+
+NS_IMETHODIMP
+Location::SetHref(const nsAString& aHref)
+{
+  nsAutoString oldHref;
+  nsresult rv = NS_OK;
+
+  JSContext *cx = nsContentUtils::GetCurrentJSContext();
+  if (cx) {
+    rv = SetHrefWithContext(cx, aHref, false);
+  } else {
+    rv = GetHref(oldHref);
+
+    if (NS_SUCCEEDED(rv)) {
+      nsCOMPtr<nsIURI> oldUri;
+
+      rv = NS_NewURI(getter_AddRefs(oldUri), oldHref);
+
+      if (oldUri) {
+        rv = SetHrefWithBase(aHref, oldUri, false);
+      }
+    }
+  }
+
+  return rv;
+}
+
+nsresult
+Location::SetHrefWithContext(JSContext* cx, const nsAString& aHref,
+                               bool aReplace)
+{
+  nsCOMPtr<nsIURI> base;
+
+  // Get the source of the caller
+  nsresult result = GetSourceBaseURL(cx, getter_AddRefs(base));
+
+  if (NS_FAILED(result)) {
+    return result;
+  }
+
+  return SetHrefWithBase(aHref, base, aReplace);
+}
+
+nsresult
+Location::SetHrefWithBase(const nsAString& aHref, nsIURI* aBase,
+                            bool aReplace)
+{
+  nsresult result;
+  nsCOMPtr<nsIURI> newUri;
+
+  nsCOMPtr<nsIDocShell> docShell(do_QueryReferent(mDocShell));
+
+  nsAutoCString docCharset;
+  if (NS_SUCCEEDED(GetDocumentCharacterSetForURI(aHref, docCharset)))
+    result = NS_NewURI(getter_AddRefs(newUri), aHref, docCharset.get(), aBase);
+  else
+    result = NS_NewURI(getter_AddRefs(newUri), aHref, nullptr, aBase);
+
+  if (newUri) {
+    /* 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 = nsGlobalWindow::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<nsIScriptGlobalObject> ourGlobal =
+          docShell ? docShell->GetScriptGlobalObject() : nullptr;
+        inScriptTag = (ourGlobal == scriptContext->GetGlobalObject());
+      }
+    }
+
+    return SetURI(newUri, aReplace || inScriptTag);
+  }
+
+  return result;
+}
+
+NS_IMETHODIMP
+Location::GetOrigin(nsAString& aOrigin)
+{
+  aOrigin.Truncate();
+
+  nsCOMPtr<nsIURI> uri;
+  nsresult rv = GetURI(getter_AddRefs(uri), true);
+  NS_ENSURE_SUCCESS(rv, rv);
+  NS_ENSURE_TRUE(uri, NS_OK);
+
+  nsAutoString origin;
+  rv = nsContentUtils::GetUTFOrigin(uri, origin);
+  NS_ENSURE_SUCCESS(rv, rv);
+
+  aOrigin = origin;
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+Location::GetPathname(nsAString& aPathname)
+{
+  aPathname.Truncate();
+
+  nsCOMPtr<nsIURI> uri;
+  nsresult result = NS_OK;
+
+  result = GetURI(getter_AddRefs(uri));
+
+  nsCOMPtr<nsIURIWithQuery> url(do_QueryInterface(uri));
+  if (url) {
+    nsAutoCString file;
+
+    result = url->GetFilePath(file);
+
+    if (NS_SUCCEEDED(result)) {
+      AppendUTF8toUTF16(file, aPathname);
+    }
+  }
+
+  return result;
+}
+
+NS_IMETHODIMP
+Location::SetPathname(const nsAString& aPathname)
+{
+  nsCOMPtr<nsIURI> uri;
+  nsresult rv = GetWritableURI(getter_AddRefs(uri));
+  if (NS_WARN_IF(NS_FAILED(rv) || !uri)) {
+    return rv;
+  }
+
+  nsCOMPtr<nsIURIWithQuery> url(do_QueryInterface(uri));
+  if (url && NS_SUCCEEDED(url->SetFilePath(NS_ConvertUTF16toUTF8(aPathname)))) {
+    return SetURI(uri);
+  }
+
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+Location::GetPort(nsAString& aPort)
+{
+  aPort.SetLength(0);
+
+  nsCOMPtr<nsIURI> uri;
+  nsresult result = NS_OK;
+
+  result = GetURI(getter_AddRefs(uri), true);
+
+  if (uri) {
+    int32_t port;
+    result = uri->GetPort(&port);
+
+    if (NS_SUCCEEDED(result) && -1 != port) {
+      nsAutoString portStr;
+      portStr.AppendInt(port);
+      aPort.Append(portStr);
+    }
+
+    // Don't propagate this exception to caller
+    result = NS_OK;
+  }
+
+  return result;
+}
+
+NS_IMETHODIMP
+Location::SetPort(const nsAString& aPort)
+{
+  nsCOMPtr<nsIURI> uri;
+  nsresult rv = GetWritableURI(getter_AddRefs(uri));
+  if (NS_WARN_IF(NS_FAILED(rv) || !uri)) {
+    return rv;
+  }
+
+  // perhaps use nsReadingIterators at some point?
+  NS_ConvertUTF16toUTF8 portStr(aPort);
+  const char *buf = portStr.get();
+  int32_t port = -1;
+
+  if (!portStr.IsEmpty() && buf) {
+    if (*buf == ':') {
+      port = atol(buf+1);
+    }
+    else {
+      port = atol(buf);
+    }
+  }
+
+  rv = uri->SetPort(port);
+  if (NS_WARN_IF(NS_FAILED(rv))) {
+    return rv;
+  }
+
+  return SetURI(uri);
+}
+
+NS_IMETHODIMP
+Location::GetProtocol(nsAString& aProtocol)
+{
+  aProtocol.SetLength(0);
+
+  nsCOMPtr<nsIURI> uri;
+  nsresult result = NS_OK;
+
+  result = GetURI(getter_AddRefs(uri));
+
+  if (uri) {
+    nsAutoCString protocol;
+
+    result = uri->GetScheme(protocol);
+
+    if (NS_SUCCEEDED(result)) {
+      CopyASCIItoUTF16(protocol, aProtocol);
+      aProtocol.Append(char16_t(':'));
+    }
+  }
+
+  return result;
+}
+
+NS_IMETHODIMP
+Location::SetProtocol(const nsAString& aProtocol)
+{
+  nsCOMPtr<nsIURI> uri;
+  nsresult rv = GetWritableURI(getter_AddRefs(uri));
+  if (NS_WARN_IF(NS_FAILED(rv) || !uri)) {
+    return rv;
+  }
+
+  rv = uri->SetScheme(NS_ConvertUTF16toUTF8(aProtocol));
+  if (NS_WARN_IF(NS_FAILED(rv))) {
+    return rv;
+  }
+  nsAutoCString newSpec;
+  rv = uri->GetSpec(newSpec);
+  if (NS_FAILED(rv)) {
+    return rv;
+  }
+  // We may want a new URI class for the new URI, so recreate it:
+  rv = NS_NewURI(getter_AddRefs(uri), newSpec);
+  if (NS_FAILED(rv)) {
+    return rv;
+  }
+
+  return SetURI(uri);
+}
+
+NS_IMETHODIMP
+Location::GetSearch(nsAString& aSearch)
+{
+  aSearch.SetLength(0);
+
+  nsCOMPtr<nsIURI> uri;
+  nsresult result = NS_OK;
+
+  result = GetURI(getter_AddRefs(uri));
+
+  nsCOMPtr<nsIURL> url(do_QueryInterface(uri));
+
+  if (url) {
+    nsAutoCString search;
+
+    result = url->GetQuery(search);
+
+    if (NS_SUCCEEDED(result) && !search.IsEmpty()) {
+      aSearch.Assign(char16_t('?'));
+      AppendUTF8toUTF16(search, aSearch);
+    }
+  }
+
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+Location::SetSearch(const nsAString& aSearch)
+{
+  nsresult rv = SetSearchInternal(aSearch);
+  if (NS_FAILED(rv)) {
+    return rv;
+  }
+
+  return NS_OK;
+}
+
+nsresult
+Location::SetSearchInternal(const nsAString& aSearch)
+{
+  nsCOMPtr<nsIURI> uri;
+  nsresult rv = GetWritableURI(getter_AddRefs(uri));
+
+  nsCOMPtr<nsIURL> url(do_QueryInterface(uri));
+  if (NS_WARN_IF(NS_FAILED(rv) || !url)) {
+    return rv;
+  }
+
+  rv = url->SetQuery(NS_ConvertUTF16toUTF8(aSearch));
+  if (NS_WARN_IF(NS_FAILED(rv))) {
+    return rv;
+  }
+
+  return SetURI(uri);
+}
+
+NS_IMETHODIMP
+Location::Reload(bool aForceget)
+{
+  nsresult rv;
+  nsCOMPtr<nsIDocShell> docShell(do_QueryReferent(mDocShell));
+  nsCOMPtr<nsIWebNavigation> webNav(do_QueryInterface(docShell));
+  nsCOMPtr<nsPIDOMWindowOuter> window = docShell ? docShell->GetWindow()
+                                                 : nullptr;
+
+  if (window && window->IsHandlingResizeEvent()) {
+    // location.reload() was called on a window that is handling a
+    // resize event. Sites do this since Netscape 4.x needed it, but
+    // we don't, and it's a horrible experience for nothing. In stead
+    // of reloading the page, just clear style data and reflow the
+    // page since some sites may use this trick to work around gecko
+    // reflow bugs, and this should have the same effect.
+
+    nsCOMPtr<nsIDocument> doc = window->GetExtantDoc();
+
+    nsIPresShell *shell;
+    nsPresContext *pcx;
+    if (doc && (shell = doc->GetShell()) && (pcx = shell->GetPresContext())) {
+      pcx->RebuildAllStyleData(NS_STYLE_HINT_REFLOW, eRestyle_Subtree);
+    }
+
+    return NS_OK;
+  }
+
+  if (webNav) {
+    uint32_t reloadFlags = nsIWebNavigation::LOAD_FLAGS_NONE;
+
+    if (aForceget) {
+      reloadFlags = nsIWebNavigation::LOAD_FLAGS_BYPASS_CACHE | 
+                    nsIWebNavigation::LOAD_FLAGS_BYPASS_PROXY;
+    }
+    rv = webNav->Reload(reloadFlags);
+    if (rv == NS_BINDING_ABORTED) {
+      // This happens when we attempt to reload a POST result and the user says
+      // no at the "do you want to reload?" prompt.  Don't propagate this one
+      // back to callers.
+      rv = NS_OK;
+    }
+  } else {
+    rv = NS_ERROR_FAILURE;
+  }
+
+  return rv;
+}
+
+NS_IMETHODIMP
+Location::Replace(const nsAString& aUrl)
+{
+  nsresult rv = NS_OK;
+  if (JSContext *cx = nsContentUtils::GetCurrentJSContext()) {
+    return SetHrefWithContext(cx, aUrl, true);
+  }
+
+  nsAutoString oldHref;
+
+  rv = GetHref(oldHref);
+  NS_ENSURE_SUCCESS(rv, rv);
+
+  nsCOMPtr<nsIURI> oldUri;
+
+  rv = NS_NewURI(getter_AddRefs(oldUri), oldHref);
+  NS_ENSURE_SUCCESS(rv, rv);
+
+  return SetHrefWithBase(aUrl, oldUri, true);
+}
+
+NS_IMETHODIMP
+Location::Assign(const nsAString& aUrl)
+{
+  if (JSContext *cx = nsContentUtils::GetCurrentJSContext()) {
+    return SetHrefWithContext(cx, aUrl, false);
+  }
+
+  nsAutoString oldHref;
+  nsresult result = NS_OK;
+
+  result = GetHref(oldHref);
+
+  if (NS_SUCCEEDED(result)) {
+    nsCOMPtr<nsIURI> oldUri;
+
+    result = NS_NewURI(getter_AddRefs(oldUri), oldHref);
+
+    if (oldUri) {
+      result = SetHrefWithBase(aUrl, oldUri, false);
+    }
+  }
+
+  return result;
+}
+
+NS_IMETHODIMP
+Location::ToString(nsAString& aReturn)
+{
+  return GetHref(aReturn);
+}
+
+NS_IMETHODIMP
+Location::ValueOf(nsIDOMLocation** aReturn)
+{
+  nsCOMPtr<nsIDOMLocation> loc(this);
+  loc.forget(aReturn);
+  return NS_OK;
+}
+
+nsresult
+Location::GetSourceBaseURL(JSContext* cx, nsIURI** sourceURL)
+{
+  *sourceURL = nullptr;
+  nsIDocument* 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 && GetDocShell()) {
+    nsCOMPtr<nsPIDOMWindowOuter> docShellWin =
+      do_QueryInterface(GetDocShell()->GetScriptGlobalObject());
+    if (docShellWin) {
+      doc = docShellWin->GetDoc();
+    }
+  }
+  NS_ENSURE_TRUE(doc, NS_OK);
+  *sourceURL = doc->GetBaseURI().take();
+  return NS_OK;
+}
+
+bool
+Location::CallerSubsumes(nsIPrincipal* aSubjectPrincipal)
+{
+  MOZ_ASSERT(aSubjectPrincipal);
+
+  // Get the principal associated with the location object.  Note that this is
+  // the principal of the page which will actually be navigated, not the
+  // principal of the Location object itself.  This is why we need this check
+  // even though we only allow limited cross-origin access to Location objects
+  // in general.
+  nsCOMPtr<nsPIDOMWindowOuter> outer = mInnerWindow->GetOuterWindow();
+  if (MOZ_UNLIKELY(!outer))
+    return false;
+  nsCOMPtr<nsIScriptObjectPrincipal> sop = do_QueryInterface(outer);
+  bool subsumes = false;
+  nsresult rv =
+    aSubjectPrincipal->SubsumesConsideringDomain(sop->GetPrincipal(),
+                                                 &subsumes);
+  NS_ENSURE_SUCCESS(rv, false);
+  return subsumes;
+}
+
+JSObject*
+Location::WrapObject(JSContext* aCx, JS::Handle<JSObject*> aGivenProto)
+{
+  return LocationBinding::Wrap(aCx, this, aGivenProto);
+}
+
+} // dom namespace
+} // mozilla namespace