mirror of
https://github.com/classilla/tenfourfox.git
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103 lines
3.4 KiB
C++
103 lines
3.4 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 "nsInterfaceHashtable.h"
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#include "nsIOService.h"
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#include "nsStandardURL.h"
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#include "mozilla/chrome/RegistryMessageUtils.h"
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#include "mozilla/Maybe.h"
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class nsIIOService;
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namespace mozilla {
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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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{
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public:
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SubstitutingProtocolHandler(const char* aScheme, uint32_t aFlags, bool aEnforceFileOrJar = true);
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explicit SubstitutingProtocolHandler(const char* aScheme);
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NS_INLINE_DECL_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 { return mSubstitutions.Get(aRoot, nullptr); }
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void CollectSubstitutions(InfallibleTArray<SubstitutionMapping>& aResources);
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protected:
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virtual ~SubstitutingProtocolHandler() {}
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void ConstructInternal();
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void SendSubstitution(const nsACString& aRoot, nsIURI* aBaseURI);
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// Override this in the subclass to try additional lookups after checking
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// mSubstitutions.
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virtual nsresult GetSubstitutionInternal(const nsACString& aRoot, nsIURI** aResult)
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{
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*aResult = nullptr;
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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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virtual bool ResolveSpecialCases(const nsACString& aHost, const nsACString& aPath, nsACString& aResult)
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{
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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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virtual nsresult SubstituteChannel(nsIURI* uri, nsILoadInfo* aLoadInfo, nsIChannel** result)
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{
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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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nsCString mScheme;
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Maybe<uint32_t> mFlags;
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nsInterfaceHashtable<nsCStringHashKey,nsIURI> mSubstitutions;
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nsCOMPtr<nsIIOService> mIOService;
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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 codebase 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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// SubstitutingURL : overrides nsStandardURL::GetFile to provide nsIFile resolution
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class SubstitutingURL : public nsStandardURL
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{
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public:
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SubstitutingURL() : nsStandardURL(true) {}
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virtual nsStandardURL* StartClone();
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virtual nsresult EnsureFile();
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NS_IMETHOD GetClassIDNoAlloc(nsCID *aCID);
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};
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} // namespace mozilla
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#endif /* SubstitutingProtocolHandler_h___ */
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