gecko-dev/content/base/public/nsDOMFile.h

561 lines
16 KiB
C++

/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* 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 nsDOMFile_h__
#define nsDOMFile_h__
#include "mozilla/Attributes.h"
#include "nsICharsetDetectionObserver.h"
#include "nsIFile.h"
#include "nsIDOMFile.h"
#include "nsIDOMFileList.h"
#include "nsIInputStream.h"
#include "nsIJSNativeInitializer.h"
#include "nsIMutable.h"
#include "nsCOMArray.h"
#include "nsCOMPtr.h"
#include "nsString.h"
#include "nsIXMLHttpRequest.h"
#include "nsAutoPtr.h"
#include "nsFileStreams.h"
#include "nsTemporaryFileInputStream.h"
#include "mozilla/GuardObjects.h"
#include "mozilla/LinkedList.h"
#include <stdint.h>
#include "mozilla/StaticMutex.h"
#include "mozilla/StaticPtr.h"
#include "mozilla/dom/DOMError.h"
#include "mozilla/dom/indexedDB/FileInfo.h"
#include "mozilla/dom/indexedDB/FileManager.h"
#include "mozilla/dom/indexedDB/IndexedDatabaseManager.h"
#include "nsWrapperCache.h"
#include "nsCycleCollectionParticipant.h"
class nsIFile;
class nsIInputStream;
class nsIClassInfo;
class nsDOMFileBase : public nsIDOMFile,
public nsIXHRSendable,
public nsIMutable
{
public:
typedef mozilla::dom::indexedDB::FileInfo FileInfo;
virtual already_AddRefed<nsIDOMBlob>
CreateSlice(uint64_t aStart, uint64_t aLength,
const nsAString& aContentType) = 0;
virtual const nsTArray<nsCOMPtr<nsIDOMBlob> >*
GetSubBlobs() const { return nullptr; }
NS_DECL_NSIDOMBLOB
NS_DECL_NSIDOMFILE
NS_DECL_NSIXHRSENDABLE
NS_DECL_NSIMUTABLE
void
SetLazyData(const nsAString& aName, const nsAString& aContentType,
uint64_t aLength, uint64_t aLastModifiedDate)
{
NS_ASSERTION(aLength, "must have length");
mName = aName;
mContentType = aContentType;
mLength = aLength;
mLastModificationDate = aLastModifiedDate;
mIsFile = !aName.IsVoid();
}
bool IsSizeUnknown() const
{
return mLength == UINT64_MAX;
}
bool IsDateUnknown() const
{
return mIsFile && mLastModificationDate == UINT64_MAX;
}
protected:
nsDOMFileBase(const nsAString& aName, const nsAString& aContentType,
uint64_t aLength, uint64_t aLastModifiedDate)
: mIsFile(true), mImmutable(false), mContentType(aContentType),
mName(aName), mStart(0), mLength(aLength), mLastModificationDate(aLastModifiedDate)
{
// Ensure non-null mContentType by default
mContentType.SetIsVoid(false);
}
nsDOMFileBase(const nsAString& aName, const nsAString& aContentType,
uint64_t aLength)
: mIsFile(true), mImmutable(false), mContentType(aContentType),
mName(aName), mStart(0), mLength(aLength), mLastModificationDate(UINT64_MAX)
{
// Ensure non-null mContentType by default
mContentType.SetIsVoid(false);
}
nsDOMFileBase(const nsAString& aContentType, uint64_t aLength)
: mIsFile(false), mImmutable(false), mContentType(aContentType),
mStart(0), mLength(aLength), mLastModificationDate(UINT64_MAX)
{
// Ensure non-null mContentType by default
mContentType.SetIsVoid(false);
}
nsDOMFileBase(const nsAString& aContentType, uint64_t aStart,
uint64_t aLength)
: mIsFile(false), mImmutable(false), mContentType(aContentType),
mStart(aStart), mLength(aLength), mLastModificationDate(UINT64_MAX)
{
NS_ASSERTION(aLength != UINT64_MAX,
"Must know length when creating slice");
// Ensure non-null mContentType by default
mContentType.SetIsVoid(false);
}
virtual ~nsDOMFileBase() {}
virtual bool IsStoredFile() const
{
return false;
}
virtual bool IsWholeFile() const
{
NS_NOTREACHED("Should only be called on dom blobs backed by files!");
return false;
}
virtual bool IsSnapshot() const
{
return false;
}
FileInfo* GetFileInfo() const
{
NS_ASSERTION(IsStoredFile(), "Should only be called on stored files!");
NS_ASSERTION(!mFileInfos.IsEmpty(), "Must have at least one file info!");
return mFileInfos.ElementAt(0);
}
bool mIsFile;
bool mImmutable;
nsString mContentType;
nsString mName;
nsString mPath; // The path relative to a directory chosen by the user
uint64_t mStart;
uint64_t mLength;
uint64_t mLastModificationDate;
// Protected by IndexedDatabaseManager::FileMutex()
nsTArray<nsRefPtr<FileInfo> > mFileInfos;
};
class nsDOMFile : public nsDOMFileBase
{
public:
nsDOMFile(const nsAString& aName, const nsAString& aContentType,
uint64_t aLength, uint64_t aLastModifiedDate)
: nsDOMFileBase(aName, aContentType, aLength, aLastModifiedDate)
{ }
nsDOMFile(const nsAString& aName, const nsAString& aContentType,
uint64_t aLength)
: nsDOMFileBase(aName, aContentType, aLength)
{ }
nsDOMFile(const nsAString& aContentType, uint64_t aLength)
: nsDOMFileBase(aContentType, aLength)
{ }
nsDOMFile(const nsAString& aContentType, uint64_t aStart, uint64_t aLength)
: nsDOMFileBase(aContentType, aStart, aLength)
{ }
NS_DECL_THREADSAFE_ISUPPORTS
};
class nsDOMFileCC : public nsDOMFileBase
{
public:
nsDOMFileCC(const nsAString& aName, const nsAString& aContentType,
uint64_t aLength)
: nsDOMFileBase(aName, aContentType, aLength)
{ }
nsDOMFileCC(const nsAString& aContentType, uint64_t aLength)
: nsDOMFileBase(aContentType, aLength)
{ }
nsDOMFileCC(const nsAString& aContentType, uint64_t aStart, uint64_t aLength)
: nsDOMFileBase(aContentType, aStart, aLength)
{ }
NS_DECL_CYCLE_COLLECTING_ISUPPORTS
NS_DECL_CYCLE_COLLECTION_CLASS_AMBIGUOUS(nsDOMFileCC, nsIDOMFile)
};
class nsDOMFileFile : public nsDOMFile
{
public:
// Create as a file
nsDOMFileFile(nsIFile *aFile)
: nsDOMFile(EmptyString(), EmptyString(), UINT64_MAX, UINT64_MAX),
mFile(aFile), mWholeFile(true), mStoredFile(false)
{
NS_ASSERTION(mFile, "must have file");
// Lazily get the content type and size
mContentType.SetIsVoid(true);
mFile->GetLeafName(mName);
}
nsDOMFileFile(nsIFile *aFile, FileInfo *aFileInfo)
: nsDOMFile(EmptyString(), EmptyString(), UINT64_MAX, UINT64_MAX),
mFile(aFile), mWholeFile(true), mStoredFile(true)
{
NS_ASSERTION(mFile, "must have file");
NS_ASSERTION(aFileInfo, "must have file info");
// Lazily get the content type and size
mContentType.SetIsVoid(true);
mFile->GetLeafName(mName);
mFileInfos.AppendElement(aFileInfo);
}
// Create as a file
nsDOMFileFile(const nsAString& aName, const nsAString& aContentType,
uint64_t aLength, nsIFile *aFile)
: nsDOMFile(aName, aContentType, aLength, UINT64_MAX),
mFile(aFile), mWholeFile(true), mStoredFile(false)
{
NS_ASSERTION(mFile, "must have file");
}
nsDOMFileFile(const nsAString& aName, const nsAString& aContentType,
uint64_t aLength, nsIFile *aFile, uint64_t aLastModificationDate)
: nsDOMFile(aName, aContentType, aLength, aLastModificationDate),
mFile(aFile), mWholeFile(true), mStoredFile(false)
{
NS_ASSERTION(mFile, "must have file");
}
// Create as a file with custom name
nsDOMFileFile(nsIFile *aFile, const nsAString& aName,
const nsAString& aContentType)
: nsDOMFile(aName, aContentType, UINT64_MAX, UINT64_MAX),
mFile(aFile), mWholeFile(true), mStoredFile(false)
{
NS_ASSERTION(mFile, "must have file");
if (aContentType.IsEmpty()) {
// Lazily get the content type and size
mContentType.SetIsVoid(true);
}
}
// Create as a stored file
nsDOMFileFile(const nsAString& aName, const nsAString& aContentType,
uint64_t aLength, nsIFile* aFile,
FileInfo* aFileInfo)
: nsDOMFile(aName, aContentType, aLength, UINT64_MAX),
mFile(aFile), mWholeFile(true), mStoredFile(true)
{
NS_ASSERTION(mFile, "must have file");
mFileInfos.AppendElement(aFileInfo);
}
// Create as a stored blob
nsDOMFileFile(const nsAString& aContentType, uint64_t aLength,
nsIFile* aFile, FileInfo* aFileInfo)
: nsDOMFile(aContentType, aLength),
mFile(aFile), mWholeFile(true), mStoredFile(true)
{
NS_ASSERTION(mFile, "must have file");
mFileInfos.AppendElement(aFileInfo);
}
// Create as a file to be later initialized
nsDOMFileFile()
: nsDOMFile(EmptyString(), EmptyString(), UINT64_MAX, UINT64_MAX),
mWholeFile(true), mStoredFile(false)
{
// Lazily get the content type and size
mContentType.SetIsVoid(true);
mName.SetIsVoid(true);
}
// Overrides
NS_IMETHOD GetSize(uint64_t* aSize) MOZ_OVERRIDE;
NS_IMETHOD GetType(nsAString& aType) MOZ_OVERRIDE;
NS_IMETHOD GetLastModifiedDate(JSContext* cx, JS::MutableHandle<JS::Value> aLastModifiedDate) MOZ_OVERRIDE;
NS_IMETHOD GetMozLastModifiedDate(uint64_t* aLastModifiedDate) MOZ_OVERRIDE;
NS_IMETHOD GetMozFullPathInternal(nsAString& aFullPath) MOZ_OVERRIDE;
NS_IMETHOD GetInternalStream(nsIInputStream**) MOZ_OVERRIDE;
void SetPath(const nsAString& aFullPath);
protected:
// Create slice
nsDOMFileFile(const nsDOMFileFile* aOther, uint64_t aStart, uint64_t aLength,
const nsAString& aContentType)
: nsDOMFile(aContentType, aOther->mStart + aStart, aLength),
mFile(aOther->mFile), mWholeFile(false),
mStoredFile(aOther->mStoredFile)
{
NS_ASSERTION(mFile, "must have file");
mImmutable = aOther->mImmutable;
if (mStoredFile) {
FileInfo* fileInfo;
using mozilla::dom::indexedDB::IndexedDatabaseManager;
if (IndexedDatabaseManager::IsClosed()) {
fileInfo = aOther->GetFileInfo();
}
else {
mozilla::MutexAutoLock lock(IndexedDatabaseManager::FileMutex());
fileInfo = aOther->GetFileInfo();
}
mFileInfos.AppendElement(fileInfo);
}
}
virtual already_AddRefed<nsIDOMBlob>
CreateSlice(uint64_t aStart, uint64_t aLength,
const nsAString& aContentType) MOZ_OVERRIDE;
virtual bool IsStoredFile() const MOZ_OVERRIDE
{
return mStoredFile;
}
virtual bool IsWholeFile() const MOZ_OVERRIDE
{
return mWholeFile;
}
nsCOMPtr<nsIFile> mFile;
bool mWholeFile;
bool mStoredFile;
};
/**
* 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 nsDOMMemoryFile : public nsDOMFile
{
public:
// Create as file
nsDOMMemoryFile(void *aMemoryBuffer,
uint64_t aLength,
const nsAString& aName,
const nsAString& aContentType)
: nsDOMFile(aName, aContentType, aLength, UINT64_MAX),
mDataOwner(new DataOwner(aMemoryBuffer, aLength))
{
NS_ASSERTION(mDataOwner && mDataOwner->mData, "must have data");
}
// Create as blob
nsDOMMemoryFile(void *aMemoryBuffer,
uint64_t aLength,
const nsAString& aContentType)
: nsDOMFile(aContentType, aLength),
mDataOwner(new DataOwner(aMemoryBuffer, aLength))
{
NS_ASSERTION(mDataOwner && mDataOwner->mData, "must have data");
}
NS_IMETHOD GetInternalStream(nsIInputStream**) MOZ_OVERRIDE;
protected:
// Create slice
nsDOMMemoryFile(const nsDOMMemoryFile* aOther, uint64_t aStart,
uint64_t aLength, const nsAString& aContentType)
: nsDOMFile(aContentType, aOther->mStart + aStart, aLength),
mDataOwner(aOther->mDataOwner)
{
NS_ASSERTION(mDataOwner && mDataOwner->mData, "must have data");
mImmutable = aOther->mImmutable;
}
virtual already_AddRefed<nsIDOMBlob>
CreateSlice(uint64_t aStart, uint64_t aLength,
const nsAString& aContentType) MOZ_OVERRIDE;
// These classes need to see DataOwner.
friend class DataOwnerAdapter;
friend class nsDOMMemoryFileDataOwnerMemoryReporter;
class DataOwner : 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);
}
~DataOwner() {
mozilla::StaticMutexAutoLock lock(sDataOwnerMutex);
remove();
if (sDataOwners->isEmpty()) {
// Free the linked list if it's empty.
sDataOwners = nullptr;
}
moz_free(mData);
}
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;
};
// Used when backed by a memory store
nsRefPtr<DataOwner> mDataOwner;
};
class nsDOMFileList MOZ_FINAL : public nsIDOMFileList,
public nsWrapperCache
{
public:
nsDOMFileList(nsISupports *aParent) : mParent(aParent)
{
SetIsDOMBinding();
}
NS_DECL_CYCLE_COLLECTING_ISUPPORTS
NS_DECL_CYCLE_COLLECTION_SCRIPT_HOLDER_CLASS(nsDOMFileList)
NS_DECL_NSIDOMFILELIST
virtual JSObject* WrapObject(JSContext *cx,
JS::Handle<JSObject*> scope) MOZ_OVERRIDE;
nsISupports* GetParentObject()
{
return mParent;
}
void Disconnect()
{
mParent = nullptr;
}
bool Append(nsIDOMFile *aFile) { return mFiles.AppendObject(aFile); }
bool Remove(uint32_t aIndex) { return mFiles.RemoveObjectAt(aIndex); }
void Clear() { return mFiles.Clear(); }
static nsDOMFileList* FromSupports(nsISupports* aSupports)
{
#ifdef DEBUG
{
nsCOMPtr<nsIDOMFileList> list_qi = do_QueryInterface(aSupports);
// If this assertion fires the QI implementation for the object in
// question doesn't use the nsIDOMFileList pointer as the nsISupports
// pointer. That must be fixed, or we'll crash...
NS_ASSERTION(list_qi == static_cast<nsIDOMFileList*>(aSupports),
"Uh, fix QI!");
}
#endif
return static_cast<nsDOMFileList*>(aSupports);
}
nsIDOMFile* Item(uint32_t aIndex)
{
return mFiles.SafeObjectAt(aIndex);
}
nsIDOMFile* IndexedGetter(uint32_t aIndex, bool& aFound)
{
aFound = aIndex < static_cast<uint32_t>(mFiles.Count());
return aFound ? mFiles.ObjectAt(aIndex) : nullptr;
}
uint32_t Length()
{
return mFiles.Count();
}
private:
nsCOMArray<nsIDOMFile> mFiles;
nsISupports *mParent;
};
class MOZ_STACK_CLASS nsDOMFileInternalUrlHolder {
public:
nsDOMFileInternalUrlHolder(nsIDOMBlob* aFile, nsIPrincipal* aPrincipal
MOZ_GUARD_OBJECT_NOTIFIER_PARAM);
~nsDOMFileInternalUrlHolder();
nsAutoString mUrl;
private:
MOZ_DECL_USE_GUARD_OBJECT_NOTIFIER
};
// This class would take the ownership of aFD and the caller must not close it.
class nsDOMTemporaryFileBlob : public nsDOMFile
{
public:
nsDOMTemporaryFileBlob(PRFileDesc* aFD, uint64_t aStartPos, uint64_t aLength,
const nsAString& aContentType)
: nsDOMFile(aContentType, aLength),
mLength(aLength),
mStartPos(aStartPos),
mContentType(aContentType)
{
mFileDescOwner = new nsTemporaryFileInputStream::FileDescOwner(aFD);
}
~nsDOMTemporaryFileBlob() { }
NS_IMETHOD GetInternalStream(nsIInputStream**) MOZ_OVERRIDE;
protected:
nsDOMTemporaryFileBlob(const nsDOMTemporaryFileBlob* aOther, uint64_t aStart, uint64_t aLength,
const nsAString& aContentType)
: nsDOMFile(aContentType, aLength),
mLength(aLength),
mStartPos(aStart),
mFileDescOwner(aOther->mFileDescOwner),
mContentType(aContentType) { }
virtual already_AddRefed<nsIDOMBlob>
CreateSlice(uint64_t aStart, uint64_t aLength,
const nsAString& aContentType) MOZ_OVERRIDE;
private:
uint64_t mLength;
uint64_t mStartPos;
nsRefPtr<nsTemporaryFileInputStream::FileDescOwner> mFileDescOwner;
nsString mContentType;
};
#endif