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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 */
#ifndef js_loader_ScriptFecthOptions_h
#define js_loader_ScriptFecthOptions_h
#include "mozilla/CORSMode.h"
#include "mozilla/dom/Element.h"
#include "mozilla/dom/ReferrerPolicyBinding.h"
#include "mozilla/dom/RequestBinding.h" // RequestPriority
#include "nsCOMPtr.h"
#include "nsIPrincipal.h"
namespace JS::loader {
// All scripts are either "parser-inserted" or "not-parser-inserted", so
// the empty string is not necessary.
enum class ParserMetadata {
* ScriptFetchOptions loosely corresponds to HTML's "script fetch options",
* with the exception of the following properties:
* integrity metadata
* The integrity metadata used for the initial fetch. This is
* implemented in ScriptLoadRequest, as it changes for every
* ScriptLoadRequest.
* referrerPolicy
* For a module script, its referrerPolicy will be updated if there is a
* HTTP Response 'REFERRER-POLICY' header, given this value may be different
* for every ScriptLoadRequest, so we store it directly in
* ScriptLoadRequest.
* In the case of classic scripts without dynamic import, this object is
* used once. For modules, this object is propogated throughout the module
* tree. If there is a dynamically imported module in any type of script,
* the ScriptFetchOptions object will be propogated from its importer.
class ScriptFetchOptions {
ScriptFetchOptions(mozilla::CORSMode aCORSMode, const nsAString& aNonce,
mozilla::dom::RequestPriority aFetchPriority,
const ParserMetadata aParserMetadata,
nsIPrincipal* aTriggeringPrincipal,
mozilla::dom::Element* aElement = nullptr);
* The credentials mode used for the initial fetch (for module scripts)
* and for fetching any imported modules (for both module scripts and
* classic scripts)
const mozilla::CORSMode mCORSMode;
* The cryptographic nonce metadata used for the initial fetch and for
* fetching any imported modules.
const nsString mNonce;
const mozilla::dom::RequestPriority mFetchPriority;
* The parser metadata used for the initial fetch and for fetching any
* imported modules
const ParserMetadata mParserMetadata;
* Used to determine CSP and if we are on the About page.
* Only used in DOM content scripts.
* TODO: Move to ScriptLoadContext
nsCOMPtr<nsIPrincipal> mTriggeringPrincipal;
* Represents fields populated by DOM elements (nonce, parser metadata)
* Leave this field as a nullptr for any fetch that requires the
* default classic script options.
* TODO: extract necessary fields rather than passing this object
nsCOMPtr<mozilla::dom::Element> mElement;
} // namespace JS::loader
#endif // js_loader_ScriptFetchOptions_h