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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/MediaError.h"
#include <string>
#include <unordered_set>
#include "mozilla/dom/Document.h"
#include "mozilla/dom/MediaErrorBinding.h"
#include "nsContentUtils.h"
#include "nsIScriptError.h"
#include "jsapi.h"
#include "js/Warnings.h" // JS::WarnASCII
namespace mozilla::dom {
NS_IMPL_CYCLE_COLLECTION_WRAPPERCACHE(MediaError, mParent)
NS_IMPL_CYCLE_COLLECTING_ADDREF(MediaError)
NS_IMPL_CYCLE_COLLECTING_RELEASE(MediaError)
NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION(MediaError)
NS_WRAPPERCACHE_INTERFACE_MAP_ENTRY
NS_INTERFACE_MAP_ENTRY(nsISupports)
NS_INTERFACE_MAP_END
MediaError::MediaError(HTMLMediaElement* aParent, uint16_t aCode,
const nsACString& aMessage)
: mParent(aParent), mCode(aCode), mMessage(aMessage) {}
void MediaError::GetMessage(nsAString& aResult) const {
// When fingerprinting resistance is enabled, only messages in this list
// can be returned to content script.
// FIXME: An unordered_set seems overkill for this.
static const std::unordered_set<std::string> whitelist = {
"404: Not Found"
// TODO
};
const bool shouldBlank = whitelist.find(mMessage.get()) == whitelist.end();
if (shouldBlank) {
// Print a warning message to JavaScript console to alert developers of
// a non-whitelisted error message.
nsAutoCString message =
nsLiteralCString(
"This error message will be blank when "
"privacy.resistFingerprinting = true."
" If it is really necessary, please add it to the whitelist in"
" MediaError::GetMessage: ") +
mMessage;
Document* ownerDoc = mParent->OwnerDoc();
AutoJSAPI api;
if (api.Init(ownerDoc->GetScopeObject())) {
// We prefer this API because it can also print to our debug log and
// try server's log viewer.
JS::WarnASCII(api.cx(), "%s", message.get());
} else {
// If failed to use JS::WarnASCII, fall back to
// nsContentUtils::ReportToConsoleNonLocalized, which can only print to
// JavaScript console.
nsContentUtils::ReportToConsoleNonLocalized(
NS_ConvertASCIItoUTF16(message), nsIScriptError::warningFlag,
"MediaError"_ns, ownerDoc);
}
if (!nsContentUtils::IsCallerChrome() &&
ownerDoc->ShouldResistFingerprinting(RFPTarget::Unknown)) {
aResult.Truncate();
return;
}
}
CopyUTF8toUTF16(mMessage, aResult);
}
JSObject* MediaError::WrapObject(JSContext* aCx,
JS::Handle<JSObject*> aGivenProto) {
return MediaError_Binding::Wrap(aCx, this, aGivenProto);
}
} // namespace mozilla::dom
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