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31ceef48aa
This avoid intermediate object tree for "JSON to principal" case. Differential Revision: https://phabricator.services.mozilla.com/D192146
117 lines
3.5 KiB
C++
117 lines
3.5 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#ifndef mozilla_PrincipalJSONHandler_h
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#define mozilla_PrincipalJSONHandler_h
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#include <stddef.h> // size_t
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#include <stdint.h> // uint32_t
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#include "js/JSON.h" // JS::JSONParseHandler
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#include "js/TypeDecls.h" // JS::Latin1Char
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#include "mozilla/AlreadyAddRefed.h" // already_AddRefed
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#include "mozilla/RefPtr.h" // RefPtr
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#include "mozilla/Variant.h" // Variant
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#include "nsDebug.h" // NS_WARNING
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#include "nsPrintfCString.h" // nsPrintfCString
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#include "BasePrincipal.h"
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#include "ContentPrincipalJSONHandler.h"
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#include "ExpandedPrincipalJSONHandler.h"
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#include "NullPrincipalJSONHandler.h"
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#include "SharedJSONHandler.h"
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namespace mozilla {
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class PrincipalJSONHandlerTypes {
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public:
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enum class State {
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Init,
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// After top-level object's '{'.
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StartObject,
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// After the PrincipalKind property key for SystemPrincipal.
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SystemPrincipal_Key,
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// After the SystemPrincipal's inner object's '{'.
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SystemPrincipal_StartObject,
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// After the SystemPrincipal's inner object's '}'.
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SystemPrincipal_EndObject,
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// After the PrincipalKind property key for NullPrincipal, ContentPrincipal,
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// or ExpandedPrincipal, and also the entire inner object.
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// Delegates to mInnerHandler until the inner object's '}'.
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NullPrincipal_Inner,
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ContentPrincipal_Inner,
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ExpandedPrincipal_Inner,
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// After top-level object's '}'.
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EndObject,
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Error,
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};
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using InnerHandlerT =
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Maybe<Variant<NullPrincipalJSONHandler, ContentPrincipalJSONHandler,
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ExpandedPrincipalJSONHandler>>;
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static constexpr bool CanContainExpandedPrincipal = true;
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};
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// JSON parse handler for the top-level object for principal.
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//
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// inner object
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// |
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// ---------------------------------------------------------
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// | |
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// {"1": {"0": "https://mozilla.com", "2": "^privateBrowsingId=1"}}
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// |
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// |
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// |
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// PrincipalKind
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//
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// For inner object except for the system principal case, this delegates
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// to NullPrincipalJSONHandler, ContentPrincipalJSONHandler, or
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// ExpandedPrincipalJSONHandler.
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//
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//// Null principal:
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// {"0":{"0":"moz-nullprincipal:{56cac540-864d-47e7-8e25-1614eab5155e}"}}
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//
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// Content principal:
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// {"1":{"0":"https://mozilla.com"}} -> {"0":"https://mozilla.com"}
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//
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// Expanded principal:
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// {"2":{"0":"<base64principal1>,<base64principal2>"}}
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//
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// System principal:
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// {"3":{}}
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class PrincipalJSONHandler
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: public ContainerPrincipalJSONHandler<PrincipalJSONHandlerTypes> {
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using State = PrincipalJSONHandlerTypes::State;
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using InnerHandlerT = PrincipalJSONHandlerTypes::InnerHandlerT;
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public:
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PrincipalJSONHandler() = default;
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virtual ~PrincipalJSONHandler() = default;
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virtual void error(const char* msg, uint32_t line, uint32_t column) override {
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NS_WARNING(
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nsPrintfCString("JSON Error: %s at line %u column %u of the JSON data",
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msg, line, column)
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.get());
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}
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already_AddRefed<BasePrincipal> Get() { return mPrincipal.forget(); }
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protected:
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virtual void SetErrorState() override { mState = State::Error; }
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};
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} // namespace mozilla
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#endif // mozilla_PrincipalJSONHandler_h
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