зеркало из https://github.com/mozilla/pjs.git
249 строки
7.3 KiB
C++
249 строки
7.3 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 4 -*-
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*
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* The contents of this file are subject to the Netscape Public License
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* Version 1.0 (the "NPL"); you may not use this file except in
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* compliance with the NPL. You may obtain a copy of the NPL at
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* http://www.mozilla.org/NPL/
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*
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* Software distributed under the NPL is distributed on an "AS IS" basis,
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* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the NPL
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* for the specific language governing rights and limitations under the
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* NPL.
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*
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* The Initial Developer of this code under the NPL is Netscape
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* Communications Corporation. Portions created by Netscape are
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* Copyright (C) 1998 Netscape Communications Corporation. All Rights
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* Reserved.
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*/
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#include "nsIFileTransportService.h"
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#include "nsIChannel.h"
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#include "nsIServiceManager.h"
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#include "nsIComponentManager.h"
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#include "nsCOMPtr.h"
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#include "nsIAllocator.h"
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#include "nsString.h"
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#include "nsIFileStream.h"
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#include "nsIStreamListener.h"
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#include "nsIEventQueueService.h"
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#include "nsIEventQueue.h"
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static NS_DEFINE_CID(kFileTransportServiceCID, NS_FILETRANSPORTSERVICE_CID);
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static NS_DEFINE_CID(kEventQueueServiceCID, NS_EVENTQUEUESERVICE_CID);
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static NS_DEFINE_IID(kEventQueueCID, NS_EVENTQUEUE_CID);
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PRBool gDone = PR_FALSE;
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nsIEventQueue* gEventQ = nsnull;
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////////////////////////////////////////////////////////////////////////////////
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class MyListener : public nsIStreamListener {
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public:
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NS_DECL_ISUPPORTS
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NS_IMETHOD OnStartRequest(nsIChannel *channel, nsISupports *ctxt) {
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printf("starting\n");
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return NS_OK;
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}
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NS_IMETHOD OnStopRequest(nsIChannel *channel, nsISupports *ctxt,
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nsresult status, const PRUnichar *errorMsg) {
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printf("ending status=%0x total=%d\n", status, mTotal);
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gDone = PR_TRUE;
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return NS_OK;
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}
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NS_IMETHOD OnDataAvailable(nsIChannel *channel, nsISupports *ctxt,
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nsIInputStream *inStr, PRUint32 sourceOffset,
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PRUint32 count) {
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printf("receiving %d bytes\n", count);
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char buf[256];
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PRUint32 writeCount;
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nsresult rv;
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while (count > 0) {
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PRUint32 amt = PR_MIN(count, 256);
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PRUint32 readCount;
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rv = inStr->Read(buf, amt, &readCount);
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if (NS_FAILED(rv)) return rv;
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NS_ASSERTION(readCount != 0, "premature EOF");
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nsresult rv = mOut->Write(buf, readCount, &writeCount);
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if (NS_FAILED(rv)) return rv;
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NS_ASSERTION(writeCount == readCount, "failed to write all the data");
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count -= readCount;
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mTotal += readCount;
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}
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return NS_OK;
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}
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MyListener() : mTotal(0) {
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NS_INIT_REFCNT();
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}
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nsresult Init(nsFileSpec& origFile) {
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nsresult rv;
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char* name = origFile.GetLeafName();
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if (name == nsnull)
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return NS_ERROR_OUT_OF_MEMORY;
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nsAutoString str(name);
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nsAllocator::Free(name);
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str += ".bak";
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nsFileSpec spec(origFile);
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spec.SetLeafName(str);
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nsISupports* out;
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rv = NS_NewTypicalOutputFileStream(&out, spec);
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if (NS_FAILED(rv)) return rv;
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mOut = do_QueryInterface(out);
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return NS_OK;
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}
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virtual ~MyListener() {
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nsresult rv = mOut->Close();
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NS_ASSERTION(NS_SUCCEEDED(rv), "Close failed");
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}
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protected:
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nsCOMPtr<nsIOutputStream> mOut;
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PRUint32 mTotal;
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};
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NS_IMPL_ISUPPORTS(MyListener, nsIStreamListener::GetIID());
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////////////////////////////////////////////////////////////////////////////////
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nsresult
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TestAsyncRead(const char* fileName, PRUint32 offset, PRInt32 length)
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{
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nsresult rv;
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NS_WITH_SERVICE(nsIEventQueueService, eventQService, kEventQueueServiceCID, &rv);
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if (NS_FAILED(rv)) return rv;
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rv = eventQService->CreateThreadEventQueue();
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if (NS_FAILED(rv)) return rv;
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rv = eventQService->GetThreadEventQueue(PR_CurrentThread(), &gEventQ);
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if (NS_FAILED(rv)) return rv;
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NS_WITH_SERVICE(nsIFileTransportService, fts, kFileTransportServiceCID, &rv);
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if (NS_FAILED(rv)) return rv;
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nsFileSpec fs(fileName);
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nsIChannel* fileTrans;
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rv = fts->CreateTransport(fs, "load", nsnull, &fileTrans);
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if (NS_FAILED(rv)) return rv;
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MyListener* listener = new MyListener();
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if (listener == nsnull)
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return NS_ERROR_OUT_OF_MEMORY;
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NS_ADDREF(listener);
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rv = listener->Init(fs);
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if (NS_FAILED(rv)) return rv;
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gDone = PR_FALSE;
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rv = fileTrans->AsyncRead(offset, length, nsnull, listener);
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if (NS_FAILED(rv)) return rv;
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while (!gDone) {
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PLEvent* event;
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rv = gEventQ->GetEvent(&event);
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if (NS_FAILED(rv)) return rv;
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rv = gEventQ->HandleEvent(event);
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if (NS_FAILED(rv)) return rv;
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}
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NS_RELEASE(listener);
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NS_RELEASE(fileTrans);
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return NS_OK;
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}
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////////////////////////////////////////////////////////////////////////////////
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nsresult
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TestAsyncWrite(const char* fileName, PRUint32 offset, PRInt32 length)
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{
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nsresult rv;
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NS_WITH_SERVICE(nsIEventQueueService, eventQService, kEventQueueServiceCID, &rv);
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if (NS_FAILED(rv)) return rv;
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rv = eventQService->CreateThreadEventQueue();
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if (NS_FAILED(rv)) return rv;
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rv = eventQService->GetThreadEventQueue(PR_CurrentThread(), &gEventQ);
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if (NS_FAILED(rv)) return rv;
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NS_WITH_SERVICE(nsIFileTransportService, fts, kFileTransportServiceCID, &rv);
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if (NS_FAILED(rv)) return rv;
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nsString outFile(fileName);
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outFile += ".out";
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nsFileSpec fs(outFile);
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nsIChannel* fileTrans;
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rv = fts->CreateTransport(fs, "load", nsnull, &fileTrans);
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if (NS_FAILED(rv)) return rv;
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MyListener* listener = new MyListener();
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if (listener == nsnull)
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return NS_ERROR_OUT_OF_MEMORY;
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NS_ADDREF(listener);
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rv = listener->Init(fs);
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if (NS_FAILED(rv)) return rv;
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nsFileSpec spec(fileName);
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nsCOMPtr<nsISupports> in;
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rv = NS_NewTypicalInputFileStream(getter_AddRefs(in), spec);
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if (NS_FAILED(rv)) return rv;
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nsCOMPtr<nsIInputStream> inStr = do_QueryInterface(in);
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gDone = PR_FALSE;
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rv = fileTrans->AsyncWrite(inStr, offset, length, nsnull, listener);
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if (NS_FAILED(rv)) return rv;
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while (!gDone) {
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PLEvent* event;
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rv = gEventQ->GetEvent(&event);
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if (NS_FAILED(rv)) return rv;
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rv = gEventQ->HandleEvent(event);
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if (NS_FAILED(rv)) return rv;
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}
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NS_RELEASE(listener);
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NS_RELEASE(fileTrans);
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return NS_OK;
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}
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////////////////////////////////////////////////////////////////////////////////
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nsresult
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NS_AutoregisterComponents()
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{
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nsresult rv = nsComponentManager::AutoRegister(nsIComponentManager::NS_Startup, NULL /* default */);
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return rv;
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}
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int
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main(int argc, char* argv[])
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{
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nsresult rv;
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if (argc < 2) {
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printf("usage: %s <file-to-read>\n", argv[0]);
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return -1;
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}
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char* fileName = argv[1];
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rv = NS_AutoregisterComponents();
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if (NS_FAILED(rv)) return rv;
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rv = TestAsyncRead(fileName, 0, -1);
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NS_ASSERTION(NS_SUCCEEDED(rv), "TestAsyncRead failed");
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rv = TestAsyncWrite(fileName, 0, -1);
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NS_ASSERTION(NS_SUCCEEDED(rv), "TestAsyncWrite failed");
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rv = TestAsyncRead(fileName, 10, 100);
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NS_ASSERTION(NS_SUCCEEDED(rv), "TestAsyncRead failed");
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return NS_OK;
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}
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