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-rw-r--r--dom/file/uri/BlobURLProtocolHandler.h140
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diff --git a/dom/file/uri/BlobURLProtocolHandler.h b/dom/file/uri/BlobURLProtocolHandler.h
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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/. */
+
+#ifndef mozilla_dom_BlobURLProtocolHandler_h
+#define mozilla_dom_BlobURLProtocolHandler_h
+
+#include "mozilla/Attributes.h"
+#include "nsIProtocolHandler.h"
+#include "nsIURI.h"
+#include "nsCOMPtr.h"
+#include "nsTArray.h"
+#include "nsWeakReference.h"
+#include <functional>
+
+#define BLOBURI_SCHEME "blob"
+
+class nsIPrincipal;
+
+namespace mozilla {
+class BlobURLsReporter;
+class OriginAttributes;
+template <class T>
+class Maybe;
+
+namespace dom {
+
+class BlobImpl;
+class BlobURLRegistrationData;
+class ContentParent;
+class MediaSource;
+
+class BlobURLProtocolHandler final : public nsIProtocolHandler,
+ public nsSupportsWeakReference {
+ public:
+ NS_DECL_ISUPPORTS
+ NS_DECL_NSIPROTOCOLHANDLER
+
+ BlobURLProtocolHandler();
+
+ static nsresult CreateNewURI(const nsACString& aSpec, const char* aCharset,
+ nsIURI* aBaseURI, nsIURI** result);
+
+ // Methods for managing uri->object mapping
+ // AddDataEntry creates the URI with the given scheme and returns it in aUri
+ static nsresult AddDataEntry(BlobImpl*, nsIPrincipal*,
+ const Maybe<nsID>& aAgentClusterId,
+ nsACString& aUri);
+ static nsresult AddDataEntry(MediaSource*, nsIPrincipal*,
+ const Maybe<nsID>& aAgentClusterId,
+ nsACString& aUri);
+ // IPC only
+ static void AddDataEntry(const nsACString& aURI, nsIPrincipal* aPrincipal,
+ const Maybe<nsID>& aAgentClusterId,
+ BlobImpl* aBlobImpl);
+
+ // These methods revoke a blobURL. Because some operations could still be in
+ // progress, the revoking consists in marking the blobURL as revoked and in
+ // removing it after RELEASING_TIMER milliseconds.
+ static void RemoveDataEntry(const nsACString& aUri,
+ bool aBroadcastToOTherProcesses = true);
+ // Returns true if the entry was allowed to be removed.
+ static bool RemoveDataEntry(const nsACString& aUri, nsIPrincipal* aPrincipal,
+ const Maybe<nsID>& aAgentClusterId);
+
+ static void RemoveDataEntries();
+
+ static bool HasDataEntry(const nsACString& aUri);
+
+ static bool GetDataEntry(const nsACString& aUri, BlobImpl** aBlobImpl,
+ nsIPrincipal* aLoadingPrincipal,
+ nsIPrincipal* aTriggeringPrincipal,
+ const OriginAttributes& aOriginAttributes,
+ uint64_t aInnerWindowId,
+ const Maybe<nsID>& aAgentClusterId,
+ bool aAlsoIfRevoked = false);
+
+ static void Traverse(const nsACString& aUri,
+ nsCycleCollectionTraversalCallback& aCallback);
+
+ // Main-thread only method to invoke a helper function that gets called for
+ // every known and recently revoked Blob URL. The helper function should
+ // return true to keep going or false to stop enumerating (presumably because
+ // of an unexpected XPCOM or IPC error). This method returns false if already
+ // shutdown or if the helper method returns false, true otherwise.
+ static bool ForEachBlobURL(
+ std::function<bool(BlobImpl*, nsIPrincipal*, const Maybe<nsID>&,
+ const nsACString&, bool aRevoked)>&& aCb);
+
+ // This method returns false if aURI is not a known BlobURL. Otherwise it
+ // returns true.
+ //
+ // When true is returned, the aPrincipal out param is meaningful. It gets
+ // set to the principal that a channel loaded from the blob would get if
+ // the blob is not already revoked and to a NullPrincipal if the blob is
+ // revoked.
+ //
+ // This means that for a revoked blob URL this method may either return
+ // false or return true and hand out a NullPrincipal in aPrincipal,
+ // depending on whether the "remove it from the hashtable" timer has
+ // fired. See RemoveDataEntry().
+ static bool GetBlobURLPrincipal(nsIURI* aURI, nsIPrincipal** aPrincipal);
+
+ // Check if metadata about Blob URLs created with this principal should be
+ // broadcast into every content process. This is currently the case for
+ // extension blob URLs and system principal blob URLs, as they can be loaded
+ // by system code and content scripts respectively.
+ static bool IsBlobURLBroadcastPrincipal(nsIPrincipal* aPrincipal);
+
+ private:
+ ~BlobURLProtocolHandler();
+
+ static void Init();
+
+ // If principal is not null, its origin will be used to generate the URI.
+ static nsresult GenerateURIString(nsIPrincipal* aPrincipal, nsACString& aUri);
+};
+
+bool IsBlobURI(nsIURI* aUri);
+bool IsMediaSourceURI(nsIURI* aUri);
+
+// Return true if inner scheme of blobURL is http or https, false otherwise.
+bool BlobURLSchemeIsHTTPOrHTTPS(const nsACString& aUri);
+
+} // namespace dom
+} // namespace mozilla
+
+extern nsresult NS_GetBlobForBlobURI(nsIURI* aURI,
+ mozilla::dom::BlobImpl** aBlob);
+
+extern nsresult NS_GetBlobForBlobURISpec(const nsACString& aSpec,
+ mozilla::dom::BlobImpl** aBlob,
+ bool aAlsoIfRevoked = false);
+
+extern nsresult NS_GetSourceForMediaSourceURI(
+ nsIURI* aURI, mozilla::dom::MediaSource** aSource);
+
+#endif /* mozilla_dom_BlobURLProtocolHandler_h */