/* 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 <functional>
#include "mozilla/dom/ipc/IdType.h"
#include "nsCOMPtr.h"
#include "nsIProtocolHandler.h"
#include "nsIURI.h"
#include "nsTArray.h"
#include "nsWeakReference.h"
#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 nsCString& aPartitionKey,
nsACString& aUri);
// IPC only (parent process)
static void AddDataEntryParent(
const nsACString& aURI,
nsIPrincipal* aPrincipal,
const nsCString& aPartitionKey,
BlobImpl* aBlobImpl,
const ContentParentId& aContentParentId);
// IPC only (content process)
static void AddDataEntryChild(
const nsACString& aURI,
nsIPrincipal* aPrincipal,
const nsCString& aPartitionKey);
// These methods revoke a list of blobURLs. 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 RemoveDataEntries(
const nsTArray<nsCString>& aUris,
bool aBroadcastToOTherProcesses = true);
static void RemoveDataEntriesPerContentParent(
const ContentParentId& aContentParentId);
// Returns true if the entry was allowed to be removed.
static bool RemoveDataEntry(
const nsACString& aUri, nsIPrincipal* aPrincipal,
const nsCString& aPartitionKey);
static void RemoveDataEntries();
static bool HasDataEntryTypeBlob(
const nsACString& aUri);
static bool GetDataEntry(
const nsACString& aUri, BlobImpl** aBlobImpl,
nsIPrincipal* aLoadingPrincipal,
nsIPrincipal* aTriggeringPrincipal,
const OriginAttributes& aOriginAttributes,
uint64_t aInnerWindowId,
const nsCString& aPartitionKey,
bool aAlsoIfRevoked =
false);
// 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 nsCString&,
const nsACString&,
bool aRevoked)>&& aCb);
// This method extracts principal information from the given Blob URL, and
// returns false if the principal cannot be determined.
//
// NOTE: This function does not confirm that a given Blob URL is valid and/or
// non-revoked. This should only be checked by trying to load the Blob URL
// using a channel.
//
// NOTE: The principal returned by this function may have different
// OriginAttributes than the "true" principal of the underlying blob.
static bool GetBlobURLPrincipal(nsIURI* aURI,
const OriginAttributes& aAttrs,
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);
// If principal is not null, its origin will be used to generate the URI.
static nsresult GenerateURIString(nsIPrincipal* aPrincipal, nsACString& aUri);
static nsresult GetURIPrefix(nsIPrincipal* aPrincipal,
nsACString& aUriPrefix);
static bool IsBlobURLValid(nsIPrincipal* aPrincipal,
const nsACString& aSpec);
private:
~BlobURLProtocolHandler();
static void Init();
};
bool IsBlobURI(nsIURI* aUri);
}
// namespace dom
}
// namespace mozilla
#endif /* mozilla_dom_BlobURLProtocolHandler_h */