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gecko/dom/base/File.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_File_h
#define mozilla_dom_File_h
#include "mozilla/Attributes.h"
#include "mozilla/ErrorResult.h"
#include "mozilla/GuardObjects.h"
#include "mozilla/LinkedList.h"
#include "mozilla/StaticMutex.h"
#include "mozilla/StaticPtr.h"
#include "mozilla/dom/BindingDeclarations.h"
#include "mozilla/dom/Date.h"
#include "nsAutoPtr.h"
#include "nsCycleCollectionParticipant.h"
#include "nsCOMPtr.h"
#include "nsIDOMBlob.h"
#include "nsIFile.h"
#include "nsIMutable.h"
#include "nsIXMLHttpRequest.h"
#include "nsString.h"
#include "nsTemporaryFileInputStream.h"
#include "nsWrapperCache.h"
#include "nsWeakReference.h"
class nsIFile;
class nsIInputStream;
#define BLOBIMPL_IID \
{ 0xbccb3275, 0x6778, 0x4ac5, \
{ 0xaf, 0x03, 0x90, 0xed, 0x37, 0xad, 0xdf, 0x5d } }
namespace mozilla {
namespace dom {
struct BlobPropertyBag;
struct ChromeFilePropertyBag;
struct FilePropertyBag;
class BlobImpl;
class File;
class OwningArrayBufferOrArrayBufferViewOrBlobOrString;
/**
* Used to indicate when a Blob/BlobImpl that was created from an nsIFile
* (when IsFile() will return true) was from an nsIFile for which
* nsIFile::IsDirectory() returned true. This is a tri-state to enable us to
* assert that the state is always set when callers request it.
*/
enum BlobDirState : uint32_t {
eIsDir,
eIsNotDir,
eUnknownIfDir
};
class Blob : public nsIDOMBlob
, public nsIXHRSendable
, public nsIMutable
, public nsSupportsWeakReference
, public nsWrapperCache
{
public:
NS_DECL_NSIDOMBLOB
NS_DECL_NSIXHRSENDABLE
NS_DECL_NSIMUTABLE
NS_DECL_CYCLE_COLLECTING_ISUPPORTS
NS_DECL_CYCLE_COLLECTION_SCRIPT_HOLDER_CLASS_AMBIGUOUS(Blob, nsIDOMBlob)
// This creates a Blob or a File based on the type of BlobImpl.
static Blob*
Create(nsISupports* aParent, BlobImpl* aImpl);
static already_AddRefed<Blob>
Create(nsISupports* aParent, const nsAString& aContentType,
uint64_t aLength);
static already_AddRefed<Blob>
Create(nsISupports* aParent, const nsAString& aContentType, uint64_t aStart,
uint64_t aLength);
// The returned Blob takes ownership of aMemoryBuffer. aMemoryBuffer will be
// freed by free so it must be allocated by malloc or something
// compatible with it.
static already_AddRefed<Blob>
CreateMemoryBlob(nsISupports* aParent, void* aMemoryBuffer, uint64_t aLength,
const nsAString& aContentType);
static already_AddRefed<Blob>
CreateTemporaryBlob(nsISupports* aParent, PRFileDesc* aFD,
uint64_t aStartPos, uint64_t aLength,
const nsAString& aContentType);
BlobImpl* Impl() const
{
return mImpl;
}
bool IsFile() const;
/**
* This may return true if the Blob was created from an nsIFile that is a
* directory.
*/
bool IsDirectory() const;
const nsTArray<RefPtr<BlobImpl>>* GetSubBlobImpls() const;
// This method returns null if this Blob is not a File; it returns
// the same object in case this Blob already implements the File interface;
// otherwise it returns a new File object with the same BlobImpl.
already_AddRefed<File> ToFile();
// XXXjwatt Consider having a ToDirectory() method. The need for a FileSystem
// object complicates that though.
// This method creates a new File object with the given name and the same
// BlobImpl.
already_AddRefed<File> ToFile(const nsAString& aName,
ErrorResult& aRv) const;
already_AddRefed<Blob>
CreateSlice(uint64_t aStart, uint64_t aLength, const nsAString& aContentType,
ErrorResult& aRv);
void
GetInternalStream(nsIInputStream** aStream, ErrorResult& aRv);
int64_t
GetFileId();
// WebIDL methods
nsISupports* GetParentObject() const
{
return mParent;
}
bool
IsMemoryFile() const;
// Blob constructor
static already_AddRefed<Blob>
Constructor(const GlobalObject& aGlobal, ErrorResult& aRv);
// Blob constructor
static already_AddRefed<Blob>
Constructor(const GlobalObject& aGlobal,
const Sequence<OwningArrayBufferOrArrayBufferViewOrBlobOrString>& aData,
const BlobPropertyBag& aBag,
ErrorResult& aRv);
virtual JSObject* WrapObject(JSContext* aCx,
JS::Handle<JSObject*> aGivenProto) override;
uint64_t GetSize(ErrorResult& aRv);
void GetType(nsAString& aType);
already_AddRefed<Blob> Slice(const Optional<int64_t>& aStart,
const Optional<int64_t>& aEnd,
const nsAString& aContentType,
ErrorResult& aRv);
protected:
// File constructor should never be used directly. Use Blob::Create instead.
Blob(nsISupports* aParent, BlobImpl* aImpl);
virtual ~Blob() {};
virtual bool HasFileInterface() const { return false; }
// The member is the real backend implementation of this File/Blob.
// It's thread-safe and not CC-able and it's the only element that is moved
// between threads.
// Note: we should not store any other state in this class!
RefPtr<BlobImpl> mImpl;
private:
nsCOMPtr<nsISupports> mParent;
};
class File final : public Blob
{
friend class Blob;
public:
// Note: BlobImpl must be a File in order to use this method.
// Check impl->IsFile().
static File*
Create(nsISupports* aParent, BlobImpl* aImpl);
static already_AddRefed<File>
Create(nsISupports* aParent, const nsAString& aName,
const nsAString& aContentType, uint64_t aLength,
int64_t aLastModifiedDate, BlobDirState aDirState);
// The returned File takes ownership of aMemoryBuffer. aMemoryBuffer will be
// freed by free so it must be allocated by malloc or something
// compatible with it.
static already_AddRefed<File>
CreateMemoryFile(nsISupports* aParent, void* aMemoryBuffer, uint64_t aLength,
const nsAString& aName, const nsAString& aContentType,
int64_t aLastModifiedDate);
static already_AddRefed<File>
CreateFromFile(nsISupports* aParent, nsIFile* aFile, bool aTemporary = false);
static already_AddRefed<File>
CreateFromFile(nsISupports* aParent, nsIFile* aFile, const nsAString& aName,
const nsAString& aContentType);
// WebIDL methods
virtual JSObject* WrapObject(JSContext *cx,
JS::Handle<JSObject*> aGivenProto) override;
// File constructor
static already_AddRefed<File>
Constructor(const GlobalObject& aGlobal,
const Sequence<OwningArrayBufferOrArrayBufferViewOrBlobOrString>& aData,
const nsAString& aName,
const FilePropertyBag& aBag,
ErrorResult& aRv);
// File constructor - ChromeOnly
static already_AddRefed<File>
Constructor(const GlobalObject& aGlobal,
Blob& aData,
const ChromeFilePropertyBag& aBag,
ErrorResult& aRv);
// File constructor - ChromeOnly
static already_AddRefed<File>
Constructor(const GlobalObject& aGlobal,
const nsAString& aData,
const ChromeFilePropertyBag& aBag,
ErrorResult& aRv);
// File constructor - ChromeOnly
static already_AddRefed<File>
Constructor(const GlobalObject& aGlobal,
nsIFile* aData,
const ChromeFilePropertyBag& aBag,
ErrorResult& aRv);
void GetName(nsAString& aName);
int64_t GetLastModified(ErrorResult& aRv);
Date GetLastModifiedDate(ErrorResult& aRv);
void GetPath(nsAString& aName, ErrorResult& aRv);
void GetMozFullPath(nsAString& aFilename, ErrorResult& aRv) const;
void GetMozFullPathInternal(nsAString& aName, ErrorResult& aRv) const;
protected:
virtual bool HasFileInterface() const override { return true; }
private:
// File constructor should never be used directly. Use Blob::Create or
// File::Create.
File(nsISupports* aParent, BlobImpl* aImpl);
~File() {};
};
// This is the abstract class for any File backend. It must be nsISupports
// because this class must be ref-counted and it has to work with IPC.
class BlobImpl : public nsISupports
{
public:
NS_DECLARE_STATIC_IID_ACCESSOR(BLOBIMPL_IID)
NS_DECL_THREADSAFE_ISUPPORTS
BlobImpl() {}
virtual void GetName(nsAString& aName) = 0;
virtual void GetPath(nsAString& aName, ErrorResult& aRv) = 0;
virtual int64_t GetLastModified(ErrorResult& aRv) = 0;
virtual void SetLastModified(int64_t aLastModified) = 0;
virtual void GetMozFullPath(nsAString& aName, ErrorResult& aRv) const = 0;
virtual void GetMozFullPathInternal(nsAString& aFileName, ErrorResult& aRv) const = 0;
virtual uint64_t GetSize(ErrorResult& aRv) = 0;
virtual void GetType(nsAString& aType) = 0;
/**
* An effectively-unique serial number identifying this instance of FileImpl.
*
* Implementations should obtain a serial number from
* FileImplBase::NextSerialNumber().
*/
virtual uint64_t GetSerialNumber() const = 0;
already_AddRefed<BlobImpl>
Slice(const Optional<int64_t>& aStart, const Optional<int64_t>& aEnd,
const nsAString& aContentType, ErrorResult& aRv);
virtual already_AddRefed<BlobImpl>
CreateSlice(uint64_t aStart, uint64_t aLength,
const nsAString& aContentType, ErrorResult& aRv) = 0;
virtual const nsTArray<RefPtr<BlobImpl>>*
GetSubBlobImpls() const = 0;
virtual void GetInternalStream(nsIInputStream** aStream,
ErrorResult& aRv) = 0;
virtual int64_t GetFileId() = 0;
virtual nsresult GetSendInfo(nsIInputStream** aBody,
uint64_t* aContentLength,
nsACString& aContentType,
nsACString& aCharset) = 0;
virtual nsresult GetMutable(bool* aMutable) const = 0;
virtual nsresult SetMutable(bool aMutable) = 0;
virtual void SetLazyData(const nsAString& aName,
const nsAString& aContentType,
uint64_t aLength,
int64_t aLastModifiedDate) = 0;
virtual bool IsMemoryFile() const = 0;
virtual bool IsSizeUnknown() const = 0;
virtual bool IsDateUnknown() const = 0;
virtual bool IsFile() const = 0;
/**
* Called when this BlobImpl was created from an nsIFile in order to call
* nsIFile::IsDirectory() and cache the result so that when the BlobImpl is
* copied to another process that informaton is available.
* nsIFile::IsDirectory() does synchronous I/O, and BlobImpl objects may be
* created on the main thread or in a non-chrome process (where I/O is not
* allowed). Do not call this on a non-chrome process, and preferably do not
* call it on the main thread.
*
* Not all creators of BlobImplFile will call this method, in which case
* calling IsDirectory will MOZ_ASSERT.
*/
virtual void LookupAndCacheIsDirectory() = 0;
virtual void SetIsDirectory(bool aIsDir) = 0;
virtual bool IsDirectory() const = 0;
/**
* Prefer IsDirectory(). This exists to help consumer code pass on state from
* one BlobImpl when creating another.
*/
virtual BlobDirState GetDirState() const = 0;
// True if this implementation can be sent to other threads.
virtual bool MayBeClonedToOtherThreads() const
{
return true;
}
protected:
virtual ~BlobImpl() {}
};
NS_DEFINE_STATIC_IID_ACCESSOR(BlobImpl, BLOBIMPL_IID)
class BlobImplBase : public BlobImpl
{
public:
BlobImplBase(const nsAString& aName, const nsAString& aContentType,
uint64_t aLength, int64_t aLastModifiedDate,
BlobDirState aDirState = BlobDirState::eUnknownIfDir)
: mIsFile(true)
, mImmutable(false)
, mDirState(aDirState)
, mContentType(aContentType)
, mName(aName)
, mStart(0)
, mLength(aLength)
, mLastModificationDate(aLastModifiedDate)
, mSerialNumber(NextSerialNumber())
{
// Ensure non-null mContentType by default
mContentType.SetIsVoid(false);
}
BlobImplBase(const nsAString& aName, const nsAString& aContentType,
uint64_t aLength)
: mIsFile(true)
, mImmutable(false)
, mDirState(BlobDirState::eUnknownIfDir)
, mContentType(aContentType)
, mName(aName)
, mStart(0)
, mLength(aLength)
, mLastModificationDate(INT64_MAX)
, mSerialNumber(NextSerialNumber())
{
// Ensure non-null mContentType by default
mContentType.SetIsVoid(false);
}
BlobImplBase(const nsAString& aContentType, uint64_t aLength)
: mIsFile(false)
, mImmutable(false)
, mDirState(BlobDirState::eUnknownIfDir)
, mContentType(aContentType)
, mStart(0)
, mLength(aLength)
, mLastModificationDate(INT64_MAX)
, mSerialNumber(NextSerialNumber())
{
// Ensure non-null mContentType by default
mContentType.SetIsVoid(false);
}
BlobImplBase(const nsAString& aContentType, uint64_t aStart,
uint64_t aLength)
: mIsFile(false)
, mImmutable(false)
, mDirState(BlobDirState::eUnknownIfDir)
, mContentType(aContentType)
, mStart(aStart)
, mLength(aLength)
, mLastModificationDate(INT64_MAX)
, mSerialNumber(NextSerialNumber())
{
NS_ASSERTION(aLength != UINT64_MAX,
"Must know length when creating slice");
// Ensure non-null mContentType by default
mContentType.SetIsVoid(false);
}
virtual void GetName(nsAString& aName) override;
virtual void GetPath(nsAString& aName, ErrorResult& aRv) override;
virtual int64_t GetLastModified(ErrorResult& aRv) override;
virtual void SetLastModified(int64_t aLastModified) override;
virtual void GetMozFullPath(nsAString& aName, ErrorResult& aRv) const override;
virtual void GetMozFullPathInternal(nsAString& aFileName,
ErrorResult& aRv) const override;
virtual uint64_t GetSize(ErrorResult& aRv) override
{
return mLength;
}
virtual void GetType(nsAString& aType) override;
virtual uint64_t GetSerialNumber() const override { return mSerialNumber; }
virtual already_AddRefed<BlobImpl>
CreateSlice(uint64_t aStart, uint64_t aLength,
const nsAString& aContentType, ErrorResult& aRv) override
{
return nullptr;
}
virtual const nsTArray<RefPtr<BlobImpl>>*
GetSubBlobImpls() const override
{
return nullptr;
}
virtual void GetInternalStream(nsIInputStream** aStream,
ErrorResult& aRv) override
{
aRv.Throw(NS_ERROR_NOT_IMPLEMENTED);
}
virtual int64_t GetFileId() override;
virtual nsresult GetSendInfo(nsIInputStream** aBody,
uint64_t* aContentLength,
nsACString& aContentType,
nsACString& aCharset) override;
virtual nsresult GetMutable(bool* aMutable) const override;
virtual nsresult SetMutable(bool aMutable) override;
virtual void
SetLazyData(const nsAString& aName, const nsAString& aContentType,
uint64_t aLength, int64_t aLastModifiedDate) override
{
mName = aName;
mContentType = aContentType;
mLength = aLength;
mLastModificationDate = aLastModifiedDate;
mIsFile = !aName.IsVoid();
}
virtual bool IsMemoryFile() const override
{
return false;
}
virtual bool IsDateUnknown() const override
{
return mIsFile && mLastModificationDate == INT64_MAX;
}
virtual bool IsFile() const override
{
return mIsFile;
}
virtual void LookupAndCacheIsDirectory() override
{
MOZ_ASSERT(false, "Why is this being called on a non-BlobImplFile?");
}
virtual void SetIsDirectory(bool aIsDir) override
{
MOZ_ASSERT(mIsFile,
"This should only be called when this object has been created "
"from an nsIFile to note that the nsIFile is a directory");
mDirState = aIsDir ? BlobDirState::eIsDir : BlobDirState::eIsNotDir;
}
/**
* Returns true if the nsIFile that this object wraps is a directory.
*/
virtual bool IsDirectory() const override
{
MOZ_ASSERT(mDirState != BlobDirState::eUnknownIfDir,
"Must only be used by callers for whom the code paths are "
"know to call LookupAndCacheIsDirectory() or "
"SetIsDirectory()");
return mDirState == BlobDirState::eIsDir;
}
virtual BlobDirState GetDirState() const override
{
return mDirState;
}
virtual bool IsSizeUnknown() const override
{
return mLength == UINT64_MAX;
}
protected:
virtual ~BlobImplBase() {}
/**
* Returns a new, effectively-unique serial number. This should be used
* by implementations to obtain a serial number for GetSerialNumber().
* The implementation is thread safe.
*/
static uint64_t NextSerialNumber();
bool mIsFile;
bool mImmutable;
BlobDirState mDirState;
nsString mContentType;
nsString mName;
nsString mPath; // The path relative to a directory chosen by the user
uint64_t mStart;
uint64_t mLength;
int64_t mLastModificationDate;
const uint64_t mSerialNumber;
};
/**
* This class may be used off the main thread, and in particular, its
* constructor and destructor may not run on the same thread. Be careful!
*/
class BlobImplMemory final : public BlobImplBase
{
public:
NS_DECL_ISUPPORTS_INHERITED
BlobImplMemory(void* aMemoryBuffer, uint64_t aLength, const nsAString& aName,
const nsAString& aContentType, int64_t aLastModifiedDate)
: BlobImplBase(aName, aContentType, aLength, aLastModifiedDate,
BlobDirState::eIsNotDir)
, mDataOwner(new DataOwner(aMemoryBuffer, aLength))
{
NS_ASSERTION(mDataOwner && mDataOwner->mData, "must have data");
}
BlobImplMemory(void* aMemoryBuffer, uint64_t aLength,
const nsAString& aContentType)
: BlobImplBase(aContentType, aLength)
, mDataOwner(new DataOwner(aMemoryBuffer, aLength))
{
NS_ASSERTION(mDataOwner && mDataOwner->mData, "must have data");
}
virtual void GetInternalStream(nsIInputStream** aStream,
ErrorResult& aRv) override;
virtual already_AddRefed<BlobImpl>
CreateSlice(uint64_t aStart, uint64_t aLength,
const nsAString& aContentType, ErrorResult& aRv) override;
virtual bool IsMemoryFile() const override
{
return true;
}
class DataOwner final : public mozilla::LinkedListElement<DataOwner>
{
public:
NS_INLINE_DECL_THREADSAFE_REFCOUNTING(DataOwner)
DataOwner(void* aMemoryBuffer, uint64_t aLength)
: mData(aMemoryBuffer)
, mLength(aLength)
{
mozilla::StaticMutexAutoLock lock(sDataOwnerMutex);
if (!sDataOwners) {
sDataOwners = new mozilla::LinkedList<DataOwner>();
EnsureMemoryReporterRegistered();
}
sDataOwners->insertBack(this);
}
private:
// Private destructor, to discourage deletion outside of Release():
~DataOwner() {
mozilla::StaticMutexAutoLock lock(sDataOwnerMutex);
remove();
if (sDataOwners->isEmpty()) {
// Free the linked list if it's empty.
sDataOwners = nullptr;
}
free(mData);
}
public:
static void EnsureMemoryReporterRegistered();
// sDataOwners and sMemoryReporterRegistered may only be accessed while
// holding sDataOwnerMutex! You also must hold the mutex while touching
// elements of the linked list that DataOwner inherits from.
static mozilla::StaticMutex sDataOwnerMutex;
static mozilla::StaticAutoPtr<mozilla::LinkedList<DataOwner> > sDataOwners;
static bool sMemoryReporterRegistered;
void* mData;
uint64_t mLength;
};
private:
// Create slice
BlobImplMemory(const BlobImplMemory* aOther, uint64_t aStart,
uint64_t aLength, const nsAString& aContentType)
: BlobImplBase(aContentType, aOther->mStart + aStart, aLength)
, mDataOwner(aOther->mDataOwner)
{
NS_ASSERTION(mDataOwner && mDataOwner->mData, "must have data");
mImmutable = aOther->mImmutable;
}
~BlobImplMemory() {}
// Used when backed by a memory store
RefPtr<DataOwner> mDataOwner;
};
class BlobImplTemporaryBlob final : public BlobImplBase
{
public:
NS_DECL_ISUPPORTS_INHERITED
BlobImplTemporaryBlob(PRFileDesc* aFD, uint64_t aStartPos,
uint64_t aLength, const nsAString& aContentType)
: BlobImplBase(aContentType, aLength)
, mStartPos(aStartPos)
{
mFileDescOwner = new nsTemporaryFileInputStream::FileDescOwner(aFD);
}
virtual void GetInternalStream(nsIInputStream** aStream,
ErrorResult& aRv) override;
virtual already_AddRefed<BlobImpl>
CreateSlice(uint64_t aStart, uint64_t aLength,
const nsAString& aContentType, ErrorResult& aRv) override;
private:
BlobImplTemporaryBlob(const BlobImplTemporaryBlob* aOther,
uint64_t aStart, uint64_t aLength,
const nsAString& aContentType)
: BlobImplBase(aContentType, aLength)
, mStartPos(aStart)
, mFileDescOwner(aOther->mFileDescOwner)
{}
~BlobImplTemporaryBlob() {}
uint64_t mStartPos;
RefPtr<nsTemporaryFileInputStream::FileDescOwner> mFileDescOwner;
};
class BlobImplFile : public BlobImplBase
{
public:
NS_DECL_ISUPPORTS_INHERITED
// Create as a file
explicit BlobImplFile(nsIFile* aFile, bool aTemporary = false)
: BlobImplBase(EmptyString(), EmptyString(), UINT64_MAX, INT64_MAX)
, mFile(aFile)
, mWholeFile(true)
, mIsTemporary(aTemporary)
{
NS_ASSERTION(mFile, "must have file");
// Lazily get the content type and size
mContentType.SetIsVoid(true);
mFile->GetLeafName(mName);
}
// Create as a file
BlobImplFile(const nsAString& aName, const nsAString& aContentType,
uint64_t aLength, nsIFile* aFile)
: BlobImplBase(aName, aContentType, aLength, UINT64_MAX)
, mFile(aFile)
, mWholeFile(true)
, mIsTemporary(false)
{
NS_ASSERTION(mFile, "must have file");
}
BlobImplFile(const nsAString& aName, const nsAString& aContentType,
uint64_t aLength, nsIFile* aFile,
int64_t aLastModificationDate)
: BlobImplBase(aName, aContentType, aLength, aLastModificationDate)
, mFile(aFile)
, mWholeFile(true)
, mIsTemporary(false)
{
NS_ASSERTION(mFile, "must have file");
}
// Create as a file with custom name
BlobImplFile(nsIFile* aFile, const nsAString& aName,
const nsAString& aContentType)
: BlobImplBase(aName, aContentType, UINT64_MAX, INT64_MAX)
, mFile(aFile)
, mWholeFile(true)
, mIsTemporary(false)
{
NS_ASSERTION(mFile, "must have file");
if (aContentType.IsEmpty()) {
// Lazily get the content type and size
mContentType.SetIsVoid(true);
}
}
// Create as a file to be later initialized
BlobImplFile()
: BlobImplBase(EmptyString(), EmptyString(), UINT64_MAX, INT64_MAX)
, mWholeFile(true)
, mIsTemporary(false)
{
// Lazily get the content type and size
mContentType.SetIsVoid(true);
mName.SetIsVoid(true);
}
// Overrides
virtual uint64_t GetSize(ErrorResult& aRv) override;
virtual void GetType(nsAString& aType) override;
virtual int64_t GetLastModified(ErrorResult& aRv) override;
virtual void SetLastModified(int64_t aLastModified) override;
virtual void GetMozFullPathInternal(nsAString& aFullPath,
ErrorResult& aRv) const override;
virtual void GetInternalStream(nsIInputStream** aInputStream,
ErrorResult& aRv) override;
void SetPath(const nsAString& aFullPath);
virtual void LookupAndCacheIsDirectory() override;
// We always have size and date for this kind of blob.
virtual bool IsSizeUnknown() const override { return false; }
virtual bool IsDateUnknown() const override { return false; }
protected:
virtual ~BlobImplFile() {
if (mFile && mIsTemporary) {
NS_WARNING("In temporary ~BlobImplFile");
// Ignore errors if any, not much we can do. Clean-up will be done by
// https://mxr.mozilla.org/mozilla-central/source/xpcom/io/nsAnonymousTemporaryFile.cpp?rev=6c1c7e45c902#127
#ifdef DEBUG
nsresult rv =
#endif
mFile->Remove(false);
NS_WARN_IF_FALSE(NS_SUCCEEDED(rv), "Failed to remove temporary DOMFile.");
}
}
private:
// Create slice
BlobImplFile(const BlobImplFile* aOther, uint64_t aStart,
uint64_t aLength, const nsAString& aContentType)
: BlobImplBase(aContentType, aOther->mStart + aStart, aLength)
, mFile(aOther->mFile)
, mWholeFile(false)
, mIsTemporary(false)
{
NS_ASSERTION(mFile, "must have file");
mImmutable = aOther->mImmutable;
}
virtual already_AddRefed<BlobImpl>
CreateSlice(uint64_t aStart, uint64_t aLength,
const nsAString& aContentType, ErrorResult& aRv) override;
nsCOMPtr<nsIFile> mFile;
bool mWholeFile;
bool mIsTemporary;
};
class EmptyBlobImpl final : public BlobImplBase
{
public:
NS_DECL_ISUPPORTS_INHERITED
explicit EmptyBlobImpl(const nsAString& aContentType)
: BlobImplBase(aContentType, 0 /* aLength */)
{}
virtual void GetInternalStream(nsIInputStream** aStream,
ErrorResult& aRv) override;
virtual already_AddRefed<BlobImpl>
CreateSlice(uint64_t aStart, uint64_t aLength,
const nsAString& aContentType, ErrorResult& aRv) override;
virtual bool IsMemoryFile() const override
{
return true;
}
private:
~EmptyBlobImpl() {}
};
} // namespace dom
} // namespace mozilla
#endif // mozilla_dom_File_h
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