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gecko-dev/netwerk/protocol/file/src/nsFileChannel.cpp

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/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*-
*
* The contents of this file are subject to the Netscape Public License
* Version 1.0 (the "NPL"); you may not use this file except in
* compliance with the NPL. You may obtain a copy of the NPL at
* http://www.mozilla.org/NPL/
*
* Software distributed under the NPL is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the NPL
* for the specific language governing rights and limitations under the
* NPL.
*
* The Initial Developer of this code under the NPL is Netscape
* Communications Corporation. Portions created by Netscape are
* Copyright (C) 1998 Netscape Communications Corporation. All Rights
* Reserved.
*/
#include "nsFileChannel.h"
#include "nscore.h"
#include "nsIEventSinkGetter.h"
#include "nsIURI.h"
#include "nsIEventQueue.h"
#include "nsIStreamListener.h"
#include "nsIIOService.h"
#include "nsIServiceManager.h"
#include "nsFileProtocolHandler.h"
#include "nsIBufferInputStream.h"
#include "nsIBufferOutputStream.h"
#include "nsAutoLock.h"
#include "netCore.h"
#include "nsIFileStream.h"
#include "nsISimpleEnumerator.h"
#include "nsIURL.h"
#include "prio.h"
#include "prmem.h" // XXX can be removed when we start doing real content-type discovery
#include "nsCOMPtr.h"
#include "nsXPIDLString.h"
#include "nsSpecialSystemDirectory.h"
#include "nsEscape.h"
#include "nsIMIMEService.h"
#include "prlog.h"
static NS_DEFINE_CID(kMIMEServiceCID, NS_MIMESERVICE_CID);
static NS_DEFINE_CID(kEventQueueService, NS_EVENTQUEUESERVICE_CID);
NS_DEFINE_CID(kIOServiceCID, NS_IOSERVICE_CID);
#ifdef STREAM_CONVERTER_HACK
#include "nsIAllocator.h"
static NS_DEFINE_CID(kStreamConverterCID, NS_STREAM_CONVERTER_CID);
#endif
#if defined(PR_LOGGING)
//
// Log module for SocketTransport logging...
//
// To enable logging (see prlog.h for full details):
//
// set NSPR_LOG_MODULES=nsFileTransport:5
// set NSPR_LOG_FILE=nspr.log
//
// this enables PR_LOG_DEBUG level information and places all output in
// the file nspr.log
//
PRLogModuleInfo* gFileTransportLog = nsnull;
#endif /* PR_LOGGING */
////////////////////////////////////////////////////////////////////////////////
nsFileChannel::nsFileChannel()
: mURI(nsnull), mGetter(nsnull), mListener(nsnull), mEventQueue(nsnull),
mContext(nsnull), mState(QUIESCENT),
mSuspended(PR_FALSE), mFileStream(nsnull),
mBufferInputStream(nsnull), mBufferOutputStream(nsnull),
mStatus(NS_OK), mHandler(nsnull), mSourceOffset(0),
mLoadAttributes(LOAD_NORMAL),
mReadFixedAmount(PR_FALSE), mLoadGroup(nsnull)
{
NS_INIT_REFCNT();
#if defined(PR_LOGGING)
//
// Initialize the global PRLogModule for socket transport logging
// if necessary...
//
if (nsnull == gFileTransportLog) {
gFileTransportLog = PR_NewLogModule("nsFileTransport");
}
#endif /* PR_LOGGING */
}
nsresult
nsFileChannel::Init(nsFileProtocolHandler* handler,
const char* verb, nsIURI* uri, nsIEventSinkGetter* getter,
nsIEventQueue* queue)
{
nsresult rv;
mHandler = handler;
NS_ADDREF(mHandler);
mGetter = getter;
NS_IF_ADDREF(mGetter);
mMonitor = PR_NewMonitor();
if (mMonitor == nsnull)
return NS_ERROR_OUT_OF_MEMORY;
if (getter) {
rv = getter->GetEventSink(verb, nsCOMTypeInfo<nsIStreamListener>::GetIID(), (nsISupports**)&mListener);
// ignore the failure -- we can live without having an event sink
}
mURI = uri;
NS_ADDREF(mURI);
// if we support the nsIURL interface then use it to get just
// the file path with no other garbage!
nsCOMPtr<nsIURL> aUrl = do_QueryInterface(mURI, &rv);
if (NS_SUCCEEDED(rv) && aUrl) // does it support the url interface?
{
nsXPIDLCString fileString;
aUrl->DirFile(getter_Copies(fileString));
// to be mac friendly you need to convert a file path to a nsFilePath before
// passing it to a nsFileSpec...
#ifdef XP_MAC
nsFilePath filePath(nsUnescape((char*)(const char*)fileString));
mSpec = filePath;
// Don't assume we actually created a good file spec
FSSpec theSpec = mSpec.GetFSSpec();
if (!theSpec.name[0])
{
NS_ERROR("failed to create a file spec");
// Since we didn't actually create the file spec
// we return an error
return NS_ERROR_MALFORMED_URI;
}
#else
nsFilePath filePath(nsUnescape((char*)(const char*)fileString));
mSpec = filePath;
#endif
}
else
{
// otherwise do the best we can by using the spec for the uri....
// XXX temporary, until we integrate more thoroughly with nsFileSpec
char* url;
rv = mURI->GetSpec(&url);
if (NS_FAILED(rv)) return rv;
nsFileURL fileURL(url);
nsCRT::free(url);
mSpec = fileURL;
}
mEventQueue = queue;
NS_IF_ADDREF(mEventQueue);
return NS_OK;
}
nsFileChannel::~nsFileChannel()
{
NS_IF_RELEASE(mURI);
NS_IF_RELEASE(mGetter);
NS_IF_RELEASE(mListener);
NS_IF_RELEASE(mEventQueue);
NS_IF_RELEASE(mContext);
NS_IF_RELEASE(mHandler);
NS_ASSERTION(mFileStream == nsnull, "channel not closed");
NS_ASSERTION(mBufferInputStream == nsnull, "channel not closed");
NS_ASSERTION(mBufferOutputStream == nsnull, "channel not closed");
if (mMonitor)
PR_DestroyMonitor(mMonitor);
NS_IF_RELEASE(mLoadGroup);
}
NS_IMETHODIMP
nsFileChannel::QueryInterface(const nsIID& aIID, void** aInstancePtr)
{
NS_ASSERTION(aInstancePtr, "no instance pointer");
if (aIID.Equals(nsCOMTypeInfo<nsIFileChannel>::GetIID()) ||
aIID.Equals(nsCOMTypeInfo<nsIChannel>::GetIID()) ||
aIID.Equals(nsCOMTypeInfo<nsISupports>::GetIID())) {
*aInstancePtr = NS_STATIC_CAST(nsIFileChannel*, this);
NS_ADDREF_THIS();
return NS_OK;
}
return NS_NOINTERFACE;
}
NS_IMPL_ADDREF(nsFileChannel);
NS_IMPL_RELEASE(nsFileChannel);
NS_METHOD
nsFileChannel::Create(nsISupports* aOuter, const nsIID& aIID, void* *aResult)
{
nsFileChannel* fc = new nsFileChannel();
if (fc == nsnull)
return NS_ERROR_OUT_OF_MEMORY;
NS_ADDREF(fc);
nsresult rv = fc->QueryInterface(aIID, aResult);
NS_RELEASE(fc);
return rv;
}
////////////////////////////////////////////////////////////////////////////////
// From nsIRequest
////////////////////////////////////////////////////////////////////////////////
NS_IMETHODIMP
nsFileChannel::IsPending(PRBool *result)
{
*result = mState != QUIESCENT;
return NS_OK;
}
NS_IMETHODIMP
nsFileChannel::Cancel()
{
nsAutoMonitor mon(mMonitor);
nsresult rv = NS_OK;
mStatus = NS_BINDING_ABORTED;
if (mSuspended) {
Resume();
}
mState = ENDING;
PR_LOG(gFileTransportLog, PR_LOG_DEBUG,
("nsFileTransport: Cancel [this=%x %s]",
this, (const char*)mSpec));
return rv;
}
NS_IMETHODIMP
nsFileChannel::Suspend()
{
nsAutoMonitor mon(mMonitor);
nsresult rv = NS_OK;
if (!mSuspended) {
// XXX close the stream here?
mStatus = mHandler->Suspend(this);
mSuspended = PR_TRUE;
PR_LOG(gFileTransportLog, PR_LOG_DEBUG,
("nsFileTransport: Suspend [this=%x %s]",
this, (const char*)mSpec));
}
return rv;
}
NS_IMETHODIMP
nsFileChannel::Resume()
{
nsAutoMonitor mon(mMonitor);
nsresult rv = NS_OK;
if (mSuspended) {
// XXX re-open the stream and seek here?
mSuspended = PR_FALSE; // set this first before resuming!
mStatus = mHandler->Resume(this);
PR_LOG(gFileTransportLog, PR_LOG_DEBUG,
("nsFileTransport: Resume [this=%x %s] status=%x",
this, (const char*)mSpec, mStatus));
}
return rv;
}
////////////////////////////////////////////////////////////////////////////////
// From nsIChannel
////////////////////////////////////////////////////////////////////////////////
NS_IMETHODIMP
nsFileChannel::GetURI(nsIURI * *aURI)
{
*aURI = mURI;
NS_ADDREF(mURI);
return NS_OK;
}
NS_IMETHODIMP
nsFileChannel::OpenInputStream(PRUint32 startPosition, PRInt32 readCount,
nsIInputStream **result)
{
nsAutoMonitor mon(mMonitor);
nsresult rv;
if (mState != QUIESCENT)
return NS_ERROR_IN_PROGRESS;
PRBool exists;
rv = Exists(&exists);
if (NS_FAILED(rv)) return rv;
if (!exists)
return NS_ERROR_FAILURE; // XXX probably need NS_BASE_STREAM_FILE_NOT_FOUND or something
rv = NS_NewPipe(&mBufferInputStream, &mBufferOutputStream,
NS_FILE_TRANSPORT_SEGMENT_SIZE,
NS_FILE_TRANSPORT_BUFFER_SIZE, PR_TRUE, this);
if (NS_FAILED(rv)) return rv;
#if 0
NS_WITH_SERVICE(nsIIOService, serv, kIOServiceCID, &rv);
if (NS_FAILED(rv)) return rv;
rv = serv->NewSyncStreamListener(&mBufferInputStream, &mBufferOutputStream, &mListener);
if (NS_FAILED(rv)) return rv;
#endif
rv = mBufferOutputStream->SetNonBlocking(PR_TRUE);
if (NS_FAILED(rv)) return rv;
mState = START_READ;
mSourceOffset = startPosition;
mAmount = readCount;
mListener = nsnull;
rv = mHandler->DispatchRequest(this);
if (NS_FAILED(rv)) return rv;
*result = mBufferInputStream;
NS_ADDREF(*result);
PR_LOG(gFileTransportLog, PR_LOG_DEBUG,
("nsFileTransport: OpenInputStream [this=%x %s]",
this, (const char*)mSpec));
return NS_OK;
}
NS_IMETHODIMP
nsFileChannel::OpenOutputStream(PRUint32 startPosition, nsIOutputStream **result)
{
nsAutoMonitor mon(mMonitor);
nsresult rv;
if (mState != QUIESCENT)
return NS_ERROR_IN_PROGRESS;
NS_ASSERTION(startPosition == 0, "implement startPosition");
nsISupports* str;
rv = NS_NewTypicalOutputFileStream(&str, mSpec);
if (NS_FAILED(rv)) return rv;
rv = str->QueryInterface(nsCOMTypeInfo<nsIOutputStream>::GetIID(), (void**)result);
NS_RELEASE(str);
PR_LOG(gFileTransportLog, PR_LOG_DEBUG,
("nsFileTransport: OpenOutputStream [this=%x %s]",
this, (const char*)mSpec));
return rv;
}
NS_IMETHODIMP
nsFileChannel::AsyncRead(PRUint32 startPosition, PRInt32 readCount,
nsISupports *ctxt,
nsIStreamListener *listener)
{
nsAutoMonitor mon(mMonitor);
nsresult rv = NS_OK;
NS_WITH_SERVICE(nsIIOService, serv, kIOServiceCID, &rv);
if (NS_FAILED(rv)) return rv;
if (!mEventQueue) {
NS_WITH_SERVICE(nsIEventQueueService, eventQService, kEventQueueService, &rv);
if (NS_FAILED(rv)) return rv;
rv = eventQService->GetThreadEventQueue(PR_CurrentThread(), &mEventQueue);
if (NS_FAILED(rv)) return rv;
}
// mscott -- this is just one temporary hack until we have a legit stream converter
// story going....if the file we are opening is an rfc822 file then we want to
// go out and convert the data into html before we try to load it. so I'm inserting
// code which if we are rfc-822 will cause us to literally insert a converter between
// the file channel stream of incoming data and the consumer at the other end of the
// AsyncRead call...
#ifdef STREAM_CONVERTER_HACK
nsXPIDLCString aContentType;
rv = GetContentType(getter_Copies(aContentType));
if (NS_SUCCEEDED(rv) && PL_strcasecmp("message/rfc822", aContentType) == 0)
{
// okay we are an rfc822 message...
// (0) Create an instance of an RFC-822 stream converter...
// because I need this converter to be around for the lifetime of the channel,
// I'm making it a member variable.
// (1) create a proxied stream listener for the caller of this method
// (2) set this proxied listener as the listener on the output stream
// (3) create a proxied stream listener for the converter
// (4) set mListener to be the stream converter's listener.
// (0) create a stream converter
nsCOMPtr<nsIStreamConverter2> mimeParser;
// mscott - we could generalize this hack to work with other stream converters by simply
// using the content type of the file to generate a progid for a stream converter and use
// that instead of a class id...
if (!mStreamConverter)
rv = nsComponentManager::CreateInstance(kStreamConverterCID,
NULL, nsCOMTypeInfo<nsIStreamConverter2>::GetIID(),
(void **) getter_AddRefs(mStreamConverter));
if (NS_FAILED(rv)) return rv;
// (1) and (2)
nsCOMPtr<nsIStreamListener> proxiedConsumerListener;
rv = serv->NewAsyncStreamListener(listener, mEventQueue, getter_AddRefs(proxiedConsumerListener));
if (NS_FAILED(rv)) return rv;
// (3) set the stream converter as the listener on the channel
mListener = mStreamConverter;
NS_IF_ADDREF(mListener); // mListener is NOT a com ptr...
// now set the output stream correctly
mStreamConverter->Init(mURI, proxiedConsumerListener, this);
mStreamConverter->GetContentType(getter_Copies(mStreamConverterOutType));
}
else
rv = serv->NewAsyncStreamListener(listener, mEventQueue, &mListener);
#else
rv = serv->NewAsyncStreamListener(listener, mEventQueue, &mListener);
#endif
if (NS_FAILED(rv)) return rv;
rv = NS_NewPipe(&mBufferInputStream, &mBufferOutputStream,
NS_FILE_TRANSPORT_SEGMENT_SIZE,
NS_FILE_TRANSPORT_BUFFER_SIZE, PR_TRUE, this);
if (NS_FAILED(rv)) return rv;
rv = mBufferOutputStream->SetNonBlocking(PR_TRUE);
if (NS_FAILED(rv)) return rv;
NS_ASSERTION(mContext == nsnull, "context not released");
mContext = ctxt;
NS_IF_ADDREF(mContext);
mState = START_READ;
mSourceOffset = startPosition;
// did the user request a specific number of bytes to read?
// if they passed in -1 then they want all bytes to be read.f
if (readCount > 0) // did the user pass in
{
mReadFixedAmount = PR_TRUE;
mAmount = (PRUint32) readCount; // mscott - this is a safe cast!
}
else
mAmount = 0; // don't worry we'll ignore this parameter from here on out because mReadFixedAmount is false
PR_LOG(gFileTransportLog, PR_LOG_DEBUG,
("nsFileTransport: AsyncRead [this=%x %s]",
this, (const char*)mSpec));
rv = mHandler->DispatchRequest(this);
if (NS_FAILED(rv)) return rv;
return NS_OK;
}
NS_IMETHODIMP
nsFileChannel::AsyncWrite(nsIInputStream *fromStream,
PRUint32 startPosition, PRInt32 writeCount,
nsISupports *ctxt,
nsIStreamObserver *observer)
{
nsAutoMonitor mon(mMonitor);
PR_LOG(gFileTransportLog, PR_LOG_DEBUG,
("nsFileTransport: AsyncWrite [this=%x %s]",
this, (const char*)mSpec));
return NS_ERROR_NOT_IMPLEMENTED;
}
NS_IMETHODIMP
nsFileChannel::GetLoadAttributes(PRUint32 *aLoadAttributes)
{
*aLoadAttributes = mLoadAttributes;
return NS_OK;
}
NS_IMETHODIMP
nsFileChannel::SetLoadAttributes(PRUint32 aLoadAttributes)
{
mLoadAttributes = aLoadAttributes;
return NS_OK;
}
#define DUMMY_TYPE "text/html"
NS_IMETHODIMP
nsFileChannel::GetContentType(char * *aContentType)
{
nsresult rv = NS_OK;
#ifdef STREAM_CONVERTER_HACK
// okay, if we already have a stream converter hooked up to the channel
// then we want to LIE about the content type...the content type is really
// the stream converter out type...
if (mStreamConverter)
{
*aContentType = (char *) nsAllocator::Clone(mStreamConverterOutType, nsCRT::strlen(mStreamConverterOutType) + 1);
return rv;
}
#endif
NS_WITH_SERVICE(nsIMIMEService, MIMEService, kMIMEServiceCID, &rv);
if (NS_FAILED(rv)) return rv;
rv = MIMEService->GetTypeFromURI(mURI, aContentType);
if (NS_SUCCEEDED(rv)) return rv;
// if all else fails treat it as text/html?
*aContentType = nsCRT::strdup(DUMMY_TYPE);
if (!*aContentType) {
return NS_ERROR_OUT_OF_MEMORY;
} else {
return NS_OK;
}
}
NS_IMETHODIMP
nsFileChannel::GetLoadGroup(nsILoadGroup * *aLoadGroup)
{
*aLoadGroup = mLoadGroup;
NS_IF_ADDREF(*aLoadGroup);
return NS_OK;
}
NS_IMETHODIMP
nsFileChannel::SetLoadGroup(nsILoadGroup * aLoadGroup)
{
NS_IF_RELEASE(mLoadGroup);
mLoadGroup = aLoadGroup;
NS_IF_ADDREF(mLoadGroup);
return NS_OK;
}
////////////////////////////////////////////////////////////////////////////////
// nsIRunnable methods:
////////////////////////////////////////////////////////////////////////////////
NS_IMETHODIMP
nsFileChannel::Run(void)
{
while (mState != QUIESCENT && !mSuspended) {
Process();
}
return NS_OK;
}
static NS_METHOD
nsWriteToFile(void* closure,
const char* fromRawSegment,
PRUint32 toOffset,
PRUint32 count,
PRUint32 *writeCount)
{
nsIOutputStream* outStr = (nsIOutputStream*)closure;
nsresult rv = outStr->Write(fromRawSegment, count, writeCount);
return rv;
}
void
nsFileChannel::Process(void)
{
nsAutoMonitor mon(mMonitor);
switch (mState) {
case START_READ: {
nsISupports* fs;
if (mListener) {
mStatus = mListener->OnStartRequest(this, mContext); // always send the start notification
if (NS_FAILED(mStatus)) goto error;
}
mStatus = NS_NewTypicalInputFileStream(&fs, mSpec);
if (NS_FAILED(mStatus)) goto error;
if (mSourceOffset > 0) // if we need to set a starting offset, QI for the nsIRandomAccessStore and set it
{
nsCOMPtr<nsIRandomAccessStore> inputStream;
inputStream = do_QueryInterface(fs, &mStatus);
if (NS_FAILED(mStatus)) goto error;
// for now, assume the offset is always relative to the start of the file (position 0)
// so use PR_SEEK_SET
inputStream->Seek(PR_SEEK_SET, mSourceOffset);
}
mStatus = fs->QueryInterface(nsCOMTypeInfo<nsIInputStream>::GetIID(), (void**)&mFileStream);
NS_RELEASE(fs);
if (NS_FAILED(mStatus)) goto error;
PR_LOG(gFileTransportLog, PR_LOG_DEBUG,
("nsFileTransport: START_READ [this=%x %s]",
this, (const char*)mSpec));
mState = READING;
break;
}
case READING: {
if (NS_FAILED(mStatus)) goto error;
nsIInputStream* fileStr = NS_STATIC_CAST(nsIInputStream*, mFileStream);
PRUint32 inLen;
mStatus = fileStr->GetLength(&inLen);
if (NS_FAILED(mStatus)) goto error;
// mscott --> if the user wanted to only read a fixed number of bytes
// we need to honor that...
if (mReadFixedAmount)
inLen = inLen < mAmount ? inLen : mAmount; // take the min(inLen, mAmount)
PRUint32 amt;
mStatus = mBufferOutputStream->WriteFrom(fileStr, inLen, &amt);
PR_LOG(gFileTransportLog, PR_LOG_DEBUG,
("nsFileTransport: READING [this=%x %s] amt=%d status=%x",
this, (const char*)mSpec, amt, mStatus));
if (mReadFixedAmount)
mAmount -= amt; // subtract off the amount we just read from mAmount.
if (NS_FAILED(mStatus)) goto error;
if (mStatus == NS_BASE_STREAM_WOULD_BLOCK || amt == 0) {
// Our nsIBufferObserver will have been called from WriteFrom
// which in turn calls Suspend, so we should end up suspending
// this file channel.
Suspend();
return;
}
// and feed the buffer to the application via the buffer stream:
if (mListener) {
mStatus = mListener->OnDataAvailable(this, mContext, mBufferInputStream, mSourceOffset, amt);
if (NS_FAILED(mStatus)) goto error;
}
if (mReadFixedAmount && mAmount == 0)
{
Cancel(); // stop reading data...we are done
return;
}
mSourceOffset += amt;
// stay in the READING state
break;
}
case START_WRITE: {
nsISupports* fs;
if (mListener) {
mStatus = mListener->OnStartRequest(this, mContext); // always send the start notification
if (NS_FAILED(mStatus)) goto error;
}
mStatus = NS_NewTypicalOutputFileStream(&fs, mSpec);
if (NS_FAILED(mStatus)) goto error;
mStatus = fs->QueryInterface(nsCOMTypeInfo<nsIOutputStream>::GetIID(), (void**)&mFileStream);
NS_RELEASE(fs);
if (NS_FAILED(mStatus)) goto error;
PR_LOG(gFileTransportLog, PR_LOG_DEBUG,
("nsFileTransport: START_WRITE [this=%x %s]",
this, (const char*)mSpec));
mState = WRITING;
break;
}
case WRITING: {
if (NS_FAILED(mStatus)) goto error;
#if 0
PRUint32 amt;
mStatus = mBuffer->ReadSegments(nsWriteToFile, mFileStream, (PRUint32)-1, &amt);
if (mStatus == NS_BASE_STREAM_EOF) goto error;
if (NS_FAILED(mStatus)) goto error;
nsAutoCMonitor mon(mBuffer);
mon.Notify();
mSourceOffset += amt;
#endif
PR_LOG(gFileTransportLog, PR_LOG_DEBUG,
("nsFileTransport: WRITING [this=%x %s]",
this, (const char*)mSpec));
// stay in the WRITING state
break;
}
case ENDING: {
PR_LOG(gFileTransportLog, PR_LOG_DEBUG,
("nsFileTransport: ENDING [this=%x %s] status=%x",
this, (const char*)mSpec, mStatus));
mBufferOutputStream->Flush();
if (mListener) {
// XXX where do we get the error message?
(void)mListener->OnStopRequest(this, mContext, mStatus, nsnull);
NS_RELEASE(mListener);
}
NS_IF_RELEASE(mBufferOutputStream);
mBufferOutputStream = nsnull;
NS_IF_RELEASE(mBufferInputStream);
mBufferInputStream = nsnull;
NS_IF_RELEASE(mFileStream);
mFileStream = nsnull;
NS_IF_RELEASE(mContext);
mContext = nsnull;
mState = QUIESCENT;
break;
}
case QUIESCENT: {
NS_NOTREACHED("trying to continue a quiescent file transfer");
break;
}
}
return;
error:
// Map EOF to NS_OK for the OnStopBinding(...) notification...
if (NS_BASE_STREAM_EOF == mStatus) {
mStatus = NS_OK;
}
mState = ENDING;
return;
}
////////////////////////////////////////////////////////////////////////////////
// nsIBufferObserver methods:
////////////////////////////////////////////////////////////////////////////////
NS_IMETHODIMP
nsFileChannel::OnFull(nsIBuffer* buffer)
{
return Suspend();
}
NS_IMETHODIMP
nsFileChannel::OnWrite(nsIBuffer* aBuffer, PRUint32 aCount)
{
return NS_OK;
}
NS_IMETHODIMP
nsFileChannel::OnEmpty(nsIBuffer* buffer)
{
return Resume();
}
////////////////////////////////////////////////////////////////////////////////
// From nsIFileChannel
////////////////////////////////////////////////////////////////////////////////
NS_IMETHODIMP
nsFileChannel::GetCreationDate(PRTime *aCreationDate)
{
// XXX no GetCreationDate in nsFileSpec yet
return NS_ERROR_NOT_IMPLEMENTED;
}
NS_IMETHODIMP
nsFileChannel::GetModDate(PRTime *aModDate)
{
nsFileSpec::TimeStamp date;
mSpec.GetModDate(date);
LL_I2L(*aModDate, date);
return NS_OK;
}
NS_IMETHODIMP
nsFileChannel::GetFileSize(PRUint32 *aFileSize)
{
*aFileSize = mSpec.GetFileSize();
return NS_OK;
}
NS_IMETHODIMP
nsFileChannel::GetParent(nsIFileChannel * *aParent)
{
nsresult rv;
nsFileSpec parentSpec;
mSpec.GetParent(parentSpec);
nsFileURL parentURL(parentSpec);
const char* urlStr = parentURL.GetURLString();
NS_WITH_SERVICE(nsIIOService, serv, kIOServiceCID, &rv);
if (NS_FAILED(rv)) return rv;
nsIChannel* channel;
rv = serv->NewChannel("load", // XXX what should this be?
urlStr, nsnull,
mGetter, &channel);
if (NS_FAILED(rv)) return rv;
// this cast is safe because nsFileURL::GetURLString aways
// returns file: strings, and consequently we'll make nsIFileChannel
// objects from them:
*aParent = NS_STATIC_CAST(nsIFileChannel*, channel);
return NS_OK;
}
class nsDirEnumerator : public nsISimpleEnumerator
{
public:
NS_DECL_ISUPPORTS
nsDirEnumerator() : mHandler(nsnull), mDir(nsnull), mNext(nsnull) {
NS_INIT_REFCNT();
}
nsresult Init(nsFileProtocolHandler* handler, nsFileSpec& spec) {
const char* path = spec.GetNativePathCString();
mDir = PR_OpenDir(path);
if (mDir == nsnull) // not a directory?
return NS_ERROR_FAILURE;
mHandler = handler;
NS_ADDREF(mHandler);
return NS_OK;
}
NS_IMETHOD HasMoreElements(PRBool *result) {
nsresult rv;
if (mNext == nsnull && mDir) {
PRDirEntry* entry = PR_ReadDir(mDir, PR_SKIP_BOTH);
if (entry == nsnull) {
// end of dir entries
PRStatus status = PR_CloseDir(mDir);
if (status != PR_SUCCESS)
return NS_ERROR_FAILURE;
mDir = nsnull;
*result = PR_FALSE;
return NS_OK;
}
const char* path = entry->name;
rv = mHandler->NewChannelFromNativePath(path, &mNext);
if (NS_FAILED(rv)) return rv;
NS_ASSERTION(mNext, "NewChannel failed");
}
*result = mNext != nsnull;
return NS_OK;
}
NS_IMETHOD GetNext(nsISupports **result) {
nsresult rv;
PRBool hasMore;
rv = HasMoreElements(&hasMore);
if (NS_FAILED(rv)) return rv;
*result = mNext; // might return nsnull
mNext = nsnull;
return NS_OK;
}
virtual ~nsDirEnumerator() {
if (mDir) {
PRStatus status = PR_CloseDir(mDir);
NS_ASSERTION(status == PR_SUCCESS, "close failed");
}
NS_IF_RELEASE(mHandler);
NS_IF_RELEASE(mNext);
}
protected:
nsFileProtocolHandler* mHandler;
PRDir* mDir;
nsIFileChannel* mNext;
};
NS_IMPL_ISUPPORTS(nsDirEnumerator, nsCOMTypeInfo<nsISimpleEnumerator>::GetIID());
NS_IMETHODIMP
nsFileChannel::GetChildren(nsISimpleEnumerator * *aChildren)
{
nsresult rv;
PRBool isDir;
rv = IsDirectory(&isDir);
if (NS_FAILED(rv)) return rv;
if (!isDir)
return NS_ERROR_FAILURE;
nsDirEnumerator* dirEnum = new nsDirEnumerator();
if (dirEnum == nsnull)
return NS_ERROR_OUT_OF_MEMORY;
NS_ADDREF(dirEnum);
rv = dirEnum->Init(mHandler, mSpec);
if (NS_FAILED(rv)) {
NS_RELEASE(dirEnum);
return rv;
}
*aChildren = dirEnum;
return NS_OK;
}
NS_IMETHODIMP
nsFileChannel::GetNativePath(char * *aNativePath)
{
char* nativePath = nsCRT::strdup(mSpec.GetNativePathCString());
if (nativePath == nsnull)
return NS_ERROR_OUT_OF_MEMORY;
*aNativePath = nativePath;
return NS_OK;
}
NS_IMETHODIMP
nsFileChannel::Exists(PRBool *result)
{
*result = mSpec.Exists();
return NS_OK;
}
NS_IMETHODIMP
nsFileChannel::Create()
{
// XXX no Create in nsFileSpec -- creates non-existent file
return NS_ERROR_NOT_IMPLEMENTED;
}
NS_IMETHODIMP
nsFileChannel::Delete()
{
// XXX no Delete in nsFileSpec -- deletes file or dir
return NS_ERROR_NOT_IMPLEMENTED;
}
NS_IMETHODIMP
nsFileChannel::MoveFrom(nsIURI *src)
{
#if 0
nsresult rv;
nsIFileChannel* fc;
rv = src->QueryInterface(nsCOMTypeInfo<nsIFileChannel>::GetIID(), (void**)&fc);
if (NS_SUCCEEDED(rv)) {
rv = fc->moveToDir(this);
NS_RELEASE(fc);
return rv;
}
else {
// Do it the hard way -- fetch the URL and store the bits locally.
// Delete the src when done.
return NS_ERROR_NOT_IMPLEMENTED;
}
#else
return NS_ERROR_NOT_IMPLEMENTED;
#endif
}
NS_IMETHODIMP
nsFileChannel::CopyFrom(nsIURI *src)
{
#if 0
nsresult rv;
nsIFileChannel* fc;
rv = src->QueryInterface(nsCOMTypeInfo<nsIFileChannel>::GetIID(), (void**)&fc);
if (NS_SUCCEEDED(rv)) {
rv = fc->copyToDir(this);
NS_RELEASE(fc);
return rv;
}
else {
// Do it the hard way -- fetch the URL and store the bits locally.
return NS_ERROR_NOT_IMPLEMENTED;
}
#else
return NS_ERROR_NOT_IMPLEMENTED;
#endif
}
NS_IMETHODIMP
nsFileChannel::IsDirectory(PRBool *result)
{
*result = mSpec.IsDirectory();
return NS_OK;
}
NS_IMETHODIMP
nsFileChannel::IsFile(PRBool *result)
{
*result = mSpec.IsFile();
return NS_OK;
}
NS_IMETHODIMP
nsFileChannel::IsLink(PRBool *_retval)
{
// XXX no IsLink in nsFileSpec (for alias/shortcut/symlink)
return NS_ERROR_NOT_IMPLEMENTED;
}
NS_IMETHODIMP
nsFileChannel::ResolveLink(nsIFileChannel **_retval)
{
// XXX no ResolveLink in nsFileSpec yet -- returns what link points to
return NS_ERROR_NOT_IMPLEMENTED;
}
NS_IMETHODIMP
nsFileChannel::MakeUniqueFileName(const char* baseName, char **_retval)
{
// XXX makeUnique needs to return the name or file spec to the newly create
// file!
return NS_ERROR_NOT_IMPLEMENTED;
}
NS_IMETHODIMP
nsFileChannel::Execute(const char *args)
{
nsresult rv;
char* queryArgs = nsnull;
if (args == nsnull) {
nsIURL* url;
rv = mURI->QueryInterface(nsCOMTypeInfo<nsIURL>::GetIID(), (void**)&url);
if (NS_SUCCEEDED(rv)) {
rv = url->GetQuery(&queryArgs);
NS_RELEASE(url);
if (NS_FAILED(rv)) return rv;
args = queryArgs;
}
}
rv = mSpec.Execute(args);
if (queryArgs)
nsCRT::free(queryArgs);
return rv;
}
////////////////////////////////////////////////////////////////////////////////
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