зеркало из https://github.com/mozilla/gecko-dev.git
132 строки
4.6 KiB
C++
132 строки
4.6 KiB
C++
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* vim: set ts=8 sts=2 et sw=2 tw=80: */
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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 file,
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* You can obtain one at http://mozilla.org/MPL/2.0/. */
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#ifndef SubstitutingProtocolHandler_h___
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#define SubstitutingProtocolHandler_h___
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#include "nsISubstitutingProtocolHandler.h"
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#include "nsTHashMap.h"
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#include "nsStandardURL.h"
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#include "nsJARURI.h"
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#include "mozilla/chrome/RegistryMessageUtils.h"
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#include "mozilla/Maybe.h"
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#include "mozilla/RWLock.h"
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class nsIIOService;
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namespace mozilla {
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namespace net {
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//
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// Base class for resource://-like substitution protocols.
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//
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// If you add a new protocol, make sure to change nsChromeRegistryChrome
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// to properly invoke CollectSubstitutions at the right time.
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class SubstitutingProtocolHandler {
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public:
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SubstitutingProtocolHandler(const char* aScheme, uint32_t aFlags,
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bool aEnforceFileOrJar = true);
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explicit SubstitutingProtocolHandler(const char* aScheme);
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NS_INLINE_DECL_THREADSAFE_REFCOUNTING(SubstitutingProtocolHandler);
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NS_DECL_NON_VIRTUAL_NSIPROTOCOLHANDLER;
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NS_DECL_NON_VIRTUAL_NSISUBSTITUTINGPROTOCOLHANDLER;
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bool HasSubstitution(const nsACString& aRoot) const {
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AutoReadLock lock(const_cast<RWLock&>(mSubstitutionsLock));
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return mSubstitutions.Get(aRoot, nullptr);
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}
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nsresult NewURI(const nsACString& aSpec, const char* aCharset,
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nsIURI* aBaseURI, nsIURI** aResult);
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[[nodiscard]] nsresult CollectSubstitutions(
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nsTArray<SubstitutionMapping>& aMappings);
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protected:
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virtual ~SubstitutingProtocolHandler() = default;
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void ConstructInternal();
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[[nodiscard]] nsresult SendSubstitution(const nsACString& aRoot,
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nsIURI* aBaseURI, uint32_t aFlags);
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nsresult GetSubstitutionFlags(const nsACString& root, uint32_t* flags);
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// Override this in the subclass to try additional lookups after checking
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// mSubstitutions.
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[[nodiscard]] virtual nsresult GetSubstitutionInternal(
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const nsACString& aRoot, nsIURI** aResult, uint32_t* aFlags) {
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*aResult = nullptr;
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*aFlags = 0;
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return NS_ERROR_NOT_AVAILABLE;
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}
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// Override this in the subclass to check for special case when resolving URIs
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// _before_ checking substitutions.
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[[nodiscard]] virtual bool ResolveSpecialCases(const nsACString& aHost,
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const nsACString& aPath,
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const nsACString& aPathname,
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nsACString& aResult) {
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return false;
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}
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// This method should only return true if GetSubstitutionInternal would
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// return the RESOLVE_JAR_URI flag.
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[[nodiscard]] virtual bool MustResolveJAR(const nsACString& aRoot) {
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return false;
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}
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// Override this in the subclass to check for special case when opening
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// channels.
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[[nodiscard]] virtual nsresult SubstituteChannel(nsIURI* uri,
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nsILoadInfo* aLoadInfo,
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nsIChannel** result) {
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return NS_OK;
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}
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nsIIOService* IOService() { return mIOService; }
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private:
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struct SubstitutionEntry {
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nsCOMPtr<nsIURI> baseURI;
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uint32_t flags = 0;
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};
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// Notifies all observers that a new substitution from |aRoot| to
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// |aBaseURI| has been set/installed for this protocol handler.
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void NotifyObservers(const nsACString& aRoot, nsIURI* aBaseURI);
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nsCString mScheme;
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Maybe<uint32_t> mFlags;
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RWLock mSubstitutionsLock;
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nsTHashMap<nsCStringHashKey, SubstitutionEntry> mSubstitutions
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GUARDED_BY(mSubstitutionsLock);
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nsCOMPtr<nsIIOService> mIOService;
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// Returns a SubstitutingJARURI if |aUrl| maps to a |jar:| URI,
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// otherwise will return |aURL|
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nsresult ResolveJARURI(nsIURL* aURL, nsIURI** aResult);
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// In general, we expect the principal of a document loaded from a
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// substituting URI to be a content principal for that URI (rather than
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// a principal for whatever is underneath). However, this only works if
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// the protocol handler for the underlying URI doesn't set an explicit
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// owner (which chrome:// does, for example). So we want to require that
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// substituting URIs only map to other URIs of the same type, or to
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// file:// and jar:// URIs.
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//
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// Enforcing this for ye olde resource:// URIs could carry compat risks, so
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// we just try to enforce it on new protocols going forward.
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bool mEnforceFileOrJar;
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};
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} // namespace net
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} // namespace mozilla
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#endif /* SubstitutingProtocolHandler_h___ */
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