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nsJSProtocolHandler.cpp
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/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/* vim: set ts=4 sw=4 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/. */
#include "nsCOMPtr.h"
#include "jsapi.h"
#include "jswrapper.h"
#include "nsCRT.h"
#include "nsError.h"
#include "nsXPIDLString.h"
#include "nsReadableUtils.h"
#include "nsJSProtocolHandler.h"
#include "nsStringStream.h"
#include "nsNetUtil.h"
#include "nsIStreamListener.h"
#include "nsIComponentManager.h"
#include "nsIServiceManager.h"
#include "nsIURI.h"
#include "nsIScriptContext.h"
#include "nsIScriptGlobalObject.h"
#include "nsIPrincipal.h"
#include "nsIScriptSecurityManager.h"
#include "nsIInterfaceRequestor.h"
#include "nsIInterfaceRequestorUtils.h"
#include "nsIWindowMediator.h"
#include "nsPIDOMWindow.h"
#include "nsIConsoleService.h"
#include "nsXPIDLString.h"
#include "prprf.h"
#include "nsEscape.h"
#include "nsIWebNavigation.h"
#include "nsIDocShell.h"
#include "nsIContentViewer.h"
#include "nsIXPConnect.h"
#include "nsContentUtils.h"
#include "nsJSUtils.h"
#include "nsThreadUtils.h"
#include "nsIScriptChannel.h"
#include "nsIDocument.h"
#include "nsILoadInfo.h"
#include "nsIObjectInputStream.h"
#include "nsIObjectOutputStream.h"
#include "nsIWritablePropertyBag2.h"
#include "nsIContentSecurityPolicy.h"
#include "nsSandboxFlags.h"
#include "mozilla/CycleCollectedJSContext.h"
#include "mozilla/dom/ScriptSettings.h"
#include "nsILoadInfo.h"
#include "nsContentSecurityManager.h"
#include "mozilla/ipc/URIUtils.h"
using mozilla::dom::AutoEntryScript;
static NS_DEFINE_CID(kJSURICID, NS_JSURI_CID);
class nsJSThunk : public nsIInputStream
{
public:
nsJSThunk();
NS_DECL_THREADSAFE_ISUPPORTS
NS_FORWARD_SAFE_NSIINPUTSTREAM(mInnerStream)
nsresult Init(nsIURI* uri);
nsresult EvaluateScript(nsIChannel *aChannel,
PopupControlState aPopupState,
uint32_t aExecutionPolicy,
nsPIDOMWindowInner *aOriginalInnerWindow);
protected:
virtual ~nsJSThunk();
nsCOMPtr<nsIInputStream> mInnerStream;
nsCString mScript;
nsCString mURL;
};
//
// nsISupports implementation...
//
NS_IMPL_ISUPPORTS(nsJSThunk, nsIInputStream)
nsJSThunk::nsJSThunk()
{
}
nsJSThunk::~nsJSThunk()
{
}
nsresult nsJSThunk::Init(nsIURI* uri)
{
NS_ENSURE_ARG_POINTER(uri);
// Get the script string to evaluate...
nsresult rv = uri->GetPath(mScript);
if (NS_FAILED(rv)) return rv;
// Get the url.
rv = uri->GetSpec(mURL);
if (NS_FAILED(rv)) return rv;
return NS_OK;
}
static bool
IsISO88591(const nsString& aString)
{
for (nsString::const_char_iterator c = aString.BeginReading(),
c_end = aString.EndReading();
c < c_end; ++c) {
if (*c > 255)
return false;
}
return true;
}
static
nsIScriptGlobalObject* GetGlobalObject(nsIChannel* aChannel)
{
// Get the global object owner from the channel
nsCOMPtr<nsIDocShell> docShell;
NS_QueryNotificationCallbacks(aChannel, docShell);
if (!docShell) {
NS_WARNING("Unable to get a docShell from the channel!");
return nullptr;
}
// So far so good: get the script global from its docshell
nsIScriptGlobalObject* global = docShell->GetScriptGlobalObject();
NS_ASSERTION(global,
"Unable to get an nsIScriptGlobalObject from the "
"docShell!");
return global;
}
nsresult nsJSThunk::EvaluateScript(nsIChannel *aChannel,
PopupControlState aPopupState,
uint32_t aExecutionPolicy,
nsPIDOMWindowInner *aOriginalInnerWindow)
{
if (aExecutionPolicy == nsIScriptChannel::NO_EXECUTION) {
// Nothing to do here.
return NS_ERROR_DOM_RETVAL_UNDEFINED;
}
NS_ENSURE_ARG_POINTER(aChannel);
// Get principal of code for execution
nsCOMPtr<nsISupports> owner;
aChannel->GetOwner(getter_AddRefs(owner));
nsCOMPtr<nsIPrincipal> principal = do_QueryInterface(owner);
if (!principal) {
nsCOMPtr<nsILoadInfo> loadInfo;
aChannel->GetLoadInfo(getter_AddRefs(loadInfo));
if (loadInfo && loadInfo->GetForceInheritPrincipal()) {
principal = loadInfo->PrincipalToInherit();
if (!principal) {
principal = loadInfo->TriggeringPrincipal();
}
} else {
// No execution without a principal!
NS_ASSERTION(!owner, "Non-principal owner?");
NS_WARNING("No principal to execute JS with");
return NS_ERROR_DOM_RETVAL_UNDEFINED;
}
}
nsresult rv;
// CSP check: javascript: URIs disabled unless "inline" scripts are
// allowed.
nsCOMPtr<nsIContentSecurityPolicy> csp;
rv = principal->GetCsp(getter_AddRefs(csp));
NS_ENSURE_SUCCESS(rv, rv);
if (csp) {
bool allowsInlineScript = true;
rv = csp->GetAllowsInline(nsIContentPolicy::TYPE_SCRIPT,
EmptyString(), // aNonce
true, // aParserCreated
EmptyString(), // aContent
0, // aLineNumber
&allowsInlineScript);
//return early if inline scripts are not allowed
if (!allowsInlineScript) {
return NS_ERROR_DOM_RETVAL_UNDEFINED;
}
}
// Get the global object we should be running on.
nsIScriptGlobalObject* global = GetGlobalObject(aChannel);
if (!global) {
return NS_ERROR_FAILURE;
}
// Sandboxed document check: javascript: URI's are disabled
// in a sandboxed document unless 'allow-scripts' was specified.
nsIDocument* doc = aOriginalInnerWindow->GetExtantDoc();
if (doc && doc->HasScriptsBlockedBySandbox()) {
return NS_ERROR_DOM_RETVAL_UNDEFINED;
}
// Push our popup control state
nsAutoPopupStatePusher popupStatePusher(aPopupState);
// Make sure we still have the same inner window as we used to.
nsCOMPtr<nsPIDOMWindowOuter> win = do_QueryInterface(global);
nsPIDOMWindowInner *innerWin = win->GetCurrentInnerWindow();
if (innerWin != aOriginalInnerWindow) {
return NS_ERROR_UNEXPECTED;
}
nsCOMPtr<nsIScriptGlobalObject> innerGlobal = do_QueryInterface(innerWin);
mozilla::DebugOnly<nsCOMPtr<nsIDOMWindow>> domWindow(do_QueryInterface(global, &rv));
if (NS_FAILED(rv)) {
return NS_ERROR_FAILURE;
}
// So far so good: get the script context from its owner.
nsCOMPtr<nsIScriptContext> scriptContext = global->GetContext();
if (!scriptContext)
return NS_ERROR_FAILURE;
nsAutoCString script(mScript);
// Unescape the script
NS_UnescapeURL(script);
nsCOMPtr<nsIScriptSecurityManager> securityManager;
securityManager = do_GetService(NS_SCRIPTSECURITYMANAGER_CONTRACTID, &rv);
if (NS_FAILED(rv))
return rv;
// New script entry point required, due to the "Create a script" step of
// http://www.whatwg.org/specs/web-apps/current-work/#javascript-protocol
mozilla::nsAutoMicroTask mt;
AutoEntryScript aes(innerGlobal, "javascript: URI", true);
JSContext* cx = aes.cx();
JS::Rooted<JSObject*> globalJSObject(cx, innerGlobal->GetGlobalJSObject());
NS_ENSURE_TRUE(globalJSObject, NS_ERROR_UNEXPECTED);
//-- Don't execute unless the script principal subsumes the
// principal of the context.
nsIPrincipal* objectPrincipal = nsContentUtils::ObjectPrincipal(globalJSObject);
bool subsumes;
rv = principal->Subsumes(objectPrincipal, &subsumes);
if (NS_FAILED(rv))
return rv;
if (!subsumes) {
return NS_ERROR_DOM_RETVAL_UNDEFINED;
}
// Fail if someone tries to execute in a global with system principal.
if (nsContentUtils::IsSystemPrincipal(objectPrincipal)) {
return NS_ERROR_DOM_SECURITY_ERR;
}
JS::Rooted<JS::Value> v (cx, JS::UndefinedValue());
// Finally, we have everything needed to evaluate the expression.
JS::CompileOptions options(cx);
options.setFileAndLine(mURL.get(), 1)
.setVersion(JSVERSION_DEFAULT);
nsJSUtils::EvaluateOptions evalOptions(cx);
evalOptions.setCoerceToString(true);
rv = nsJSUtils::EvaluateString(cx, NS_ConvertUTF8toUTF16(script),
globalJSObject, options, evalOptions, &v);
if (NS_FAILED(rv) || !(v.isString() || v.isUndefined())) {
return NS_ERROR_MALFORMED_URI;
} else if (v.isUndefined()) {
return NS_ERROR_DOM_RETVAL_UNDEFINED;
} else {
MOZ_ASSERT(rv != NS_SUCCESS_DOM_SCRIPT_EVALUATION_THREW,
"How did we get a non-undefined return value?");
nsAutoJSString result;
if (!result.init(cx, v)) {
return NS_ERROR_OUT_OF_MEMORY;
}
char *bytes;
uint32_t bytesLen;
NS_NAMED_LITERAL_CSTRING(isoCharset, "ISO-8859-1");
NS_NAMED_LITERAL_CSTRING(utf8Charset, "UTF-8");
const nsCString *charset;
if (IsISO88591(result)) {
// For compatibility, if the result is ISO-8859-1, we use
// ISO-8859-1, so that people can compatibly create images
// using javascript: URLs.
bytes = ToNewCString(result);
bytesLen = result.Length();
charset = &isoCharset;
}
else {
bytes = ToNewUTF8String(result, &bytesLen);
charset = &utf8Charset;
}
aChannel->SetContentCharset(*charset);
if (bytes)
rv = NS_NewByteInputStream(getter_AddRefs(mInnerStream),
bytes, bytesLen,
NS_ASSIGNMENT_ADOPT);
else
rv = NS_ERROR_OUT_OF_MEMORY;
}
return rv;
}
////////////////////////////////////////////////////////////////////////////////
class nsJSChannel : public nsIChannel,
public nsIStreamListener,
public nsIScriptChannel,
public nsIPropertyBag2
{
public:
nsJSChannel();
NS_DECL_ISUPPORTS
NS_DECL_NSIREQUEST
NS_DECL_NSICHANNEL
NS_DECL_NSIREQUESTOBSERVER
NS_DECL_NSISTREAMLISTENER
NS_DECL_NSISCRIPTCHANNEL
NS_FORWARD_SAFE_NSIPROPERTYBAG(mPropertyBag)
NS_FORWARD_SAFE_NSIPROPERTYBAG2(mPropertyBag)
nsresult Init(nsIURI *aURI, nsILoadInfo* aLoadInfo);
// Actually evaluate the script.
void EvaluateScript();
protected:
virtual ~nsJSChannel();
nsresult StopAll();
void NotifyListener();
void CleanupStrongRefs();
protected:
nsCOMPtr<nsIChannel> mStreamChannel;
nsCOMPtr<nsIPropertyBag2> mPropertyBag;
nsCOMPtr<nsIStreamListener> mListener; // Our final listener
nsCOMPtr<nsPIDOMWindowInner> mOriginalInnerWindow; // The inner window our load
// started against.
// If we blocked onload on a document in AsyncOpen2, this is the document we
// did it on.
nsCOMPtr<nsIDocument> mDocumentOnloadBlockedOn;
nsresult mStatus; // Our status
nsLoadFlags mLoadFlags;
nsLoadFlags mActualLoadFlags; // See AsyncOpen2
RefPtr<nsJSThunk> mIOThunk;
PopupControlState mPopupState;
uint32_t mExecutionPolicy;
bool mIsAsync;
bool mIsActive;
bool mOpenedStreamChannel;
};
nsJSChannel::nsJSChannel() :
mStatus(NS_OK),
mLoadFlags(LOAD_NORMAL),
mActualLoadFlags(LOAD_NORMAL),
mPopupState(openOverridden),
mExecutionPolicy(NO_EXECUTION),
mIsAsync(true),
mIsActive(false),
mOpenedStreamChannel(false)
{
}
nsJSChannel::~nsJSChannel()
{
}
nsresult nsJSChannel::StopAll()
{
nsresult rv = NS_ERROR_UNEXPECTED;
nsCOMPtr<nsIWebNavigation> webNav;
NS_QueryNotificationCallbacks(mStreamChannel, webNav);
NS_ASSERTION(webNav, "Can't get nsIWebNavigation from channel!");
if (webNav) {
rv = webNav->Stop(nsIWebNavigation::STOP_ALL);
}
return rv;
}
nsresult nsJSChannel::Init(nsIURI* aURI, nsILoadInfo* aLoadInfo)
{
RefPtr<nsJSURI> jsURI;
nsresult rv = aURI->QueryInterface(kJSURICID,
getter_AddRefs(jsURI));
NS_ENSURE_SUCCESS(rv, rv);
// Create the nsIStreamIO layer used by the nsIStreamIOChannel.
mIOThunk = new nsJSThunk();
// Create a stock input stream channel...
// Remember, until AsyncOpen is called, the script will not be evaluated
// and the underlying Input Stream will not be created...
nsCOMPtr<nsIChannel> channel;
rv = NS_NewInputStreamChannelInternal(getter_AddRefs(channel),
aURI,
mIOThunk,
NS_LITERAL_CSTRING("text/html"),
EmptyCString(),
aLoadInfo);
NS_ENSURE_SUCCESS(rv, rv);
rv = mIOThunk->Init(aURI);
if (NS_SUCCEEDED(rv)) {
mStreamChannel = channel;
mPropertyBag = do_QueryInterface(channel);
nsCOMPtr<nsIWritablePropertyBag2> writableBag =
do_QueryInterface(channel);
if (writableBag && jsURI->GetBaseURI()) {
writableBag->SetPropertyAsInterface(NS_LITERAL_STRING("baseURI"),
jsURI->GetBaseURI());
}
}
return rv;
}
//
// nsISupports implementation...
//
NS_IMPL_ISUPPORTS(nsJSChannel, nsIChannel, nsIRequest, nsIRequestObserver,
nsIStreamListener, nsIScriptChannel, nsIPropertyBag,
nsIPropertyBag2)
//
// nsIRequest implementation...
//
NS_IMETHODIMP
nsJSChannel::GetName(nsACString &aResult)
{
return mStreamChannel->GetName(aResult);
}
NS_IMETHODIMP
nsJSChannel::IsPending(bool *aResult)
{
*aResult = mIsActive;
return NS_OK;
}
NS_IMETHODIMP
nsJSChannel::GetStatus(nsresult *aResult)
{
if (NS_SUCCEEDED(mStatus) && mOpenedStreamChannel) {
return mStreamChannel->GetStatus(aResult);
}
*aResult = mStatus;
return NS_OK;
}
NS_IMETHODIMP
nsJSChannel::Cancel(nsresult aStatus)
{
mStatus = aStatus;
if (mOpenedStreamChannel) {
mStreamChannel->Cancel(aStatus);
}
return NS_OK;
}
NS_IMETHODIMP
nsJSChannel::Suspend()
{
return mStreamChannel->Suspend();
}
NS_IMETHODIMP
nsJSChannel::Resume()
{
return mStreamChannel->Resume();
}
//
// nsIChannel implementation
//
NS_IMETHODIMP
nsJSChannel::GetOriginalURI(nsIURI * *aURI)
{
return mStreamChannel->GetOriginalURI(aURI);
}
NS_IMETHODIMP
nsJSChannel::SetOriginalURI(nsIURI *aURI)
{
return mStreamChannel->SetOriginalURI(aURI);
}
NS_IMETHODIMP
nsJSChannel::GetURI(nsIURI * *aURI)
{
return mStreamChannel->GetURI(aURI);
}
NS_IMETHODIMP
nsJSChannel::Open(nsIInputStream **aResult)
{
nsresult rv = mIOThunk->EvaluateScript(mStreamChannel, mPopupState,
mExecutionPolicy,
mOriginalInnerWindow);
NS_ENSURE_SUCCESS(rv, rv);
return mStreamChannel->Open(aResult);
}
NS_IMETHODIMP
nsJSChannel::Open2(nsIInputStream** aStream)
{
nsCOMPtr<nsIStreamListener> listener;
nsresult rv = nsContentSecurityManager::doContentSecurityCheck(this, listener);
NS_ENSURE_SUCCESS(rv, rv);
return Open(aStream);
}
NS_IMETHODIMP
nsJSChannel::AsyncOpen(nsIStreamListener *aListener, nsISupports *aContext)
{
#ifdef DEBUG
{
nsCOMPtr<nsILoadInfo> loadInfo = nsIChannel::GetLoadInfo();
MOZ_ASSERT(!loadInfo || loadInfo->GetSecurityMode() == 0 ||
loadInfo->GetInitialSecurityCheckDone(),
"security flags in loadInfo but asyncOpen2() not called");
}
#endif
MOZ_RELEASE_ASSERT(!aContext, "please call AsyncOpen2()");
NS_ENSURE_ARG(aListener);
// First make sure that we have a usable inner window; we'll want to make
// sure that we execute against that inner and no other.
nsIScriptGlobalObject* global = GetGlobalObject(this);
if (!global) {
return NS_ERROR_NOT_AVAILABLE;
}
nsCOMPtr<nsPIDOMWindowOuter> win(do_QueryInterface(global));
NS_ASSERTION(win, "Our global is not a window??");
// Make sure we create a new inner window if one doesn't already exist (see
// bug 306630).
mOriginalInnerWindow = win->EnsureInnerWindow();
if (!mOriginalInnerWindow) {
return NS_ERROR_NOT_AVAILABLE;
}
mListener = aListener;
mIsActive = true;
// Temporarily set the LOAD_BACKGROUND flag to suppress load group observer
// notifications (and hence nsIWebProgressListener notifications) from
// being dispatched. This is required since we suppress LOAD_DOCUMENT_URI,
// which means that the DocLoader would not generate document start and
// stop notifications (see bug 257875).
mActualLoadFlags = mLoadFlags;
mLoadFlags |= LOAD_BACKGROUND;
// Add the javascript channel to its loadgroup so that we know if
// network loads were canceled or not...
nsCOMPtr<nsILoadGroup> loadGroup;
mStreamChannel->GetLoadGroup(getter_AddRefs(loadGroup));
if (loadGroup) {
nsresult rv = loadGroup->AddRequest(this, nullptr);
if (NS_FAILED(rv)) {
mIsActive = false;
CleanupStrongRefs();
return rv;
}
}
mDocumentOnloadBlockedOn = mOriginalInnerWindow->GetExtantDoc();
if (mDocumentOnloadBlockedOn) {
// If we're a document channel, we need to actually block onload on our
// _parent_ document. This is because we don't actually set our
// LOAD_DOCUMENT_URI flag, so a docloader we're loading in as the
// document channel will claim to not be busy, and our parent's onload
// could fire too early.
nsLoadFlags loadFlags;
mStreamChannel->GetLoadFlags(&loadFlags);
if (loadFlags & LOAD_DOCUMENT_URI) {
mDocumentOnloadBlockedOn =
mDocumentOnloadBlockedOn->GetParentDocument();
}
}
if (mDocumentOnloadBlockedOn) {
mDocumentOnloadBlockedOn->BlockOnload();
}
mPopupState = win->GetPopupControlState();
void (nsJSChannel::*method)();
if (mIsAsync) {
// post an event to do the rest
method = &nsJSChannel::EvaluateScript;
} else {
EvaluateScript();
if (mOpenedStreamChannel) {
// That will handle notifying things
return NS_OK;
}
NS_ASSERTION(NS_FAILED(mStatus), "We should have failed _somehow_");
// mStatus is going to be NS_ERROR_DOM_RETVAL_UNDEFINED if we didn't
// have any content resulting from the execution and NS_BINDING_ABORTED
// if something we did causes our own load to be stopped. Return
// success in those cases, and error out in all others.
if (mStatus != NS_ERROR_DOM_RETVAL_UNDEFINED &&
mStatus != NS_BINDING_ABORTED) {
// Note that calling EvaluateScript() handled removing us from the
// loadgroup and marking us as not active anymore.
CleanupStrongRefs();
return mStatus;
}
// We're returning success from asyncOpen2(), but we didn't open a
// stream channel. We'll have to notify ourselves, but make sure to do
// it asynchronously.
method = &nsJSChannel::NotifyListener;
}
nsresult rv = NS_DispatchToCurrentThread(mozilla::NewRunnableMethod(this, method));
if (NS_FAILED(rv)) {
loadGroup->RemoveRequest(this, nullptr, rv);
mIsActive = false;
CleanupStrongRefs();
}
return rv;
}
NS_IMETHODIMP
nsJSChannel::AsyncOpen2(nsIStreamListener *aListener)
{
nsCOMPtr<nsIStreamListener> listener = aListener;
nsresult rv = nsContentSecurityManager::doContentSecurityCheck(this, listener);
NS_ENSURE_SUCCESS(rv, rv);
return AsyncOpen(listener, nullptr);
}
void
nsJSChannel::EvaluateScript()
{
// Synchronously execute the script...
// mIsActive is used to indicate the the request is 'busy' during the
// the script evaluation phase. This means that IsPending() will
// indicate the the request is busy while the script is executing...
// Note that we want to be in the loadgroup and pending while we evaluate
// the script, so that we find out if the loadgroup gets canceled by the
// script execution (in which case we shouldn't pump out data even if the
// script returns it).
if (NS_SUCCEEDED(mStatus)) {
nsresult rv = mIOThunk->EvaluateScript(mStreamChannel, mPopupState,
mExecutionPolicy,
mOriginalInnerWindow);
// Note that evaluation may have canceled us, so recheck mStatus again
if (NS_FAILED(rv) && NS_SUCCEEDED(mStatus)) {
mStatus = rv;
}
}
// Remove the javascript channel from its loadgroup...
nsCOMPtr<nsILoadGroup> loadGroup;
mStreamChannel->GetLoadGroup(getter_AddRefs(loadGroup));
if (loadGroup) {
loadGroup->RemoveRequest(this, nullptr, mStatus);
}
// Reset load flags to their original value...
mLoadFlags = mActualLoadFlags;
// We're no longer active, it's now up to the stream channel to do
// the loading, if needed.
mIsActive = false;
if (NS_FAILED(mStatus)) {
if (mIsAsync) {
NotifyListener();
}
return;
}
// EvaluateScript() succeeded, and we were not canceled, that
// means there's data to parse as a result of evaluating the
// script.
// Get the stream channels load flags (!= mLoadFlags).
nsLoadFlags loadFlags;
mStreamChannel->GetLoadFlags(&loadFlags);
uint32_t disposition;
if (NS_FAILED(mStreamChannel->GetContentDisposition(&disposition)))
disposition = nsIChannel::DISPOSITION_INLINE;
if (loadFlags & LOAD_DOCUMENT_URI && disposition != nsIChannel::DISPOSITION_ATTACHMENT) {
// We're loaded as the document channel and not expecting to download
// the result. If we go on, we'll blow away the current document. Make
// sure that's ok. If so, stop all pending network loads.
nsCOMPtr<nsIDocShell> docShell;
NS_QueryNotificationCallbacks(mStreamChannel, docShell);
if (docShell) {
nsCOMPtr<nsIContentViewer> cv;
docShell->GetContentViewer(getter_AddRefs(cv));
if (cv) {
bool okToUnload;
if (NS_SUCCEEDED(cv->PermitUnload(&okToUnload)) &&
!okToUnload) {
// The user didn't want to unload the current
// page, translate this into an undefined
// return from the javascript: URL...
mStatus = NS_ERROR_DOM_RETVAL_UNDEFINED;
}
}
}
if (NS_SUCCEEDED(mStatus)) {
mStatus = StopAll();
}
}
if (NS_FAILED(mStatus)) {
if (mIsAsync) {
NotifyListener();
}
return;
}
mStatus = mStreamChannel->AsyncOpen2(this);
if (NS_SUCCEEDED(mStatus)) {
// mStreamChannel will call OnStartRequest and OnStopRequest on
// us, so we'll be sure to call them on our listener.
mOpenedStreamChannel = true;
// Now readd ourselves to the loadgroup so we can receive
// cancellation notifications.
mIsActive = true;
if (loadGroup) {
mStatus = loadGroup->AddRequest(this, nullptr);
// If AddRequest failed, that's OK. The key is to make sure we get
// cancelled if needed, and that call just canceled us if it
// failed. We'll still get notified by the stream channel when it
// finishes.
}
} else if (mIsAsync) {
NotifyListener();
}
return;
}
void
nsJSChannel::NotifyListener()
{
mListener->OnStartRequest(this, nullptr);
mListener->OnStopRequest(this, nullptr, mStatus);
CleanupStrongRefs();
}
void
nsJSChannel::CleanupStrongRefs()
{
mListener = nullptr;
mOriginalInnerWindow = nullptr;
if (mDocumentOnloadBlockedOn) {
mDocumentOnloadBlockedOn->UnblockOnload(false);
mDocumentOnloadBlockedOn = nullptr;
}
}
NS_IMETHODIMP
nsJSChannel::GetLoadFlags(nsLoadFlags *aLoadFlags)
{
*aLoadFlags = mLoadFlags;
return NS_OK;
}
NS_IMETHODIMP
nsJSChannel::SetLoadFlags(nsLoadFlags aLoadFlags)
{
// Figure out whether the LOAD_BACKGROUND bit in aLoadFlags is
// actually right.
bool bogusLoadBackground = false;
if (mIsActive && !(mActualLoadFlags & LOAD_BACKGROUND) &&
(aLoadFlags & LOAD_BACKGROUND)) {
// We're getting a LOAD_BACKGROUND, but it's probably just our own fake
// flag being mirrored to us. The one exception is if our loadgroup is
// LOAD_BACKGROUND.
bool loadGroupIsBackground = false;
nsCOMPtr<nsILoadGroup> loadGroup;
mStreamChannel->GetLoadGroup(getter_AddRefs(loadGroup));
if (loadGroup) {
nsLoadFlags loadGroupFlags;
loadGroup->GetLoadFlags(&loadGroupFlags);
loadGroupIsBackground = ((loadGroupFlags & LOAD_BACKGROUND) != 0);
}
bogusLoadBackground = !loadGroupIsBackground;
}
// Classifying a javascript: URI doesn't help us, and requires
// NSS to boot, which we don't have in content processes. See
// https://bugzilla.mozilla.org/show_bug.cgi?id=617838.
aLoadFlags &= ~LOAD_CLASSIFY_URI;
// Since the javascript channel is never the actual channel that
// any data is loaded through, don't ever set the
// LOAD_DOCUMENT_URI flag on it, since that could lead to two
// 'document channels' in the loadgroup if a javascript: URL is
// loaded while a document is being loaded in the same window.
// XXXbz this, and a whole lot of other hackery, could go away if we'd just
// cancel the current document load on javascript: load start like IE does.
mLoadFlags = aLoadFlags & ~LOAD_DOCUMENT_URI;
if (bogusLoadBackground) {
aLoadFlags = aLoadFlags & ~LOAD_BACKGROUND;
}
mActualLoadFlags = aLoadFlags;
// ... but the underlying stream channel should get this bit, if
// set, since that'll be the real document channel if the
// javascript: URL generated data.
return mStreamChannel->SetLoadFlags(aLoadFlags);
}
NS_IMETHODIMP
nsJSChannel::GetLoadGroup(nsILoadGroup* *aLoadGroup)
{
return mStreamChannel->GetLoadGroup(aLoadGroup);
}
NS_IMETHODIMP
nsJSChannel::SetLoadGroup(nsILoadGroup* aLoadGroup)
{
if (aLoadGroup) {
bool streamPending;
nsresult rv = mStreamChannel->IsPending(&streamPending);
NS_ENSURE_SUCCESS(rv, rv);
if (streamPending) {
nsCOMPtr<nsILoadGroup> curLoadGroup;
mStreamChannel->GetLoadGroup(getter_AddRefs(curLoadGroup));
if (aLoadGroup != curLoadGroup) {
// Move the stream channel to our new loadgroup. Make sure to
// add it before removing it, so that we don't trigger onload
// by accident.
aLoadGroup->AddRequest(mStreamChannel, nullptr);
if (curLoadGroup) {
curLoadGroup->RemoveRequest(mStreamChannel, nullptr,
NS_BINDING_RETARGETED);
}
}
}
}
return mStreamChannel->SetLoadGroup(aLoadGroup);
}
NS_IMETHODIMP
nsJSChannel::GetOwner(nsISupports* *aOwner)
{
return mStreamChannel->GetOwner(aOwner);
}
NS_IMETHODIMP
nsJSChannel::SetOwner(nsISupports* aOwner)
{
return mStreamChannel->SetOwner(aOwner);
}
NS_IMETHODIMP
nsJSChannel::GetLoadInfo(nsILoadInfo* *aLoadInfo)
{
return mStreamChannel->GetLoadInfo(aLoadInfo);
}
NS_IMETHODIMP
nsJSChannel::SetLoadInfo(nsILoadInfo* aLoadInfo)
{
return mStreamChannel->SetLoadInfo(aLoadInfo);
}
NS_IMETHODIMP
nsJSChannel::GetNotificationCallbacks(nsIInterfaceRequestor* *aCallbacks)
{
return mStreamChannel->GetNotificationCallbacks(aCallbacks);
}
NS_IMETHODIMP
nsJSChannel::SetNotificationCallbacks(nsIInterfaceRequestor* aCallbacks)
{
return mStreamChannel->SetNotificationCallbacks(aCallbacks);
}
NS_IMETHODIMP
nsJSChannel::GetSecurityInfo(nsISupports * *aSecurityInfo)
{
return mStreamChannel->GetSecurityInfo(aSecurityInfo);
}
NS_IMETHODIMP
nsJSChannel::GetContentType(nsACString &aContentType)
{
return mStreamChannel->GetContentType(aContentType);
}
NS_IMETHODIMP
nsJSChannel::SetContentType(const nsACString &aContentType)
{
return mStreamChannel->SetContentType(aContentType);
}
NS_IMETHODIMP
nsJSChannel::GetContentCharset(nsACString &aContentCharset)
{
return mStreamChannel->GetContentCharset(aContentCharset);
}
NS_IMETHODIMP
nsJSChannel::SetContentCharset(const nsACString &aContentCharset)
{
return mStreamChannel->SetContentCharset(aContentCharset);
}
NS_IMETHODIMP
nsJSChannel::GetContentDisposition(uint32_t *aContentDisposition)
{
return mStreamChannel->GetContentDisposition(aContentDisposition);
}
NS_IMETHODIMP
nsJSChannel::SetContentDisposition(uint32_t aContentDisposition)
{
return mStreamChannel->SetContentDisposition(aContentDisposition);
}
NS_IMETHODIMP
nsJSChannel::GetContentDispositionFilename(nsAString &aContentDispositionFilename)
{
return mStreamChannel->GetContentDispositionFilename(aContentDispositionFilename);
}
NS_IMETHODIMP
nsJSChannel::SetContentDispositionFilename(const nsAString &aContentDispositionFilename)
{
return mStreamChannel->SetContentDispositionFilename(aContentDispositionFilename);
}
NS_IMETHODIMP
nsJSChannel::GetContentDispositionHeader(nsACString &aContentDispositionHeader)
{
return mStreamChannel->GetContentDispositionHeader(aContentDispositionHeader);
}
NS_IMETHODIMP