зеркало из https://github.com/mozilla/gecko-dev.git
157 строки
4.5 KiB
C++
157 строки
4.5 KiB
C++
/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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/*
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A simple test program that reads in RDF/XML into an in-memory data
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source, then uses the RDF/XML serialization API to write an
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equivalent (but not identical) RDF/XML file back to stdout.
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The program takes a single parameter: the URL from which to read.
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*/
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#include <stdio.h>
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#include "nsXPCOM.h"
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#include "nsCOMPtr.h"
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#include "nsIComponentManager.h"
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#include "nsComponentManagerUtils.h"
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#include "nsServiceManagerUtils.h"
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#include "nsIIOService.h"
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#include "nsIInputStream.h"
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#include "nsIOutputStream.h"
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#include "nsIRDFCompositeDataSource.h"
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#include "nsIRDFNode.h"
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#include "nsIRDFRemoteDataSource.h"
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#include "nsIRDFService.h"
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#include "nsIRDFXMLSource.h"
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#include "nsIServiceManager.h"
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#include "nsIStreamListener.h"
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#include "nsIURL.h"
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#include "nsRDFCID.h"
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#include "nsThreadUtils.h"
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#include "plstr.h"
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#include "prio.h"
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#include "prthread.h"
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////////////////////////////////////////////////////////////////////////
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// CIDs
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// rdf
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static NS_DEFINE_CID(kRDFXMLDataSourceCID, NS_RDFXMLDATASOURCE_CID);
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////////////////////////////////////////////////////////////////////////
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// Blatantly stolen from netwerk/test/
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#define RETURN_IF_FAILED(rv, step) \
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PR_BEGIN_MACRO \
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if (NS_FAILED(rv)) { \
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printf(">>> %s failed: rv=%x\n", step, static_cast<uint32_t>(rv)); \
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return 1;\
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} \
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PR_END_MACRO
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////////////////////////////////////////////////////////////////////////
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class ConsoleOutputStreamImpl : public nsIOutputStream
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{
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protected:
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virtual ~ConsoleOutputStreamImpl(void) {}
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public:
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ConsoleOutputStreamImpl(void) {}
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// nsISupports interface
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NS_DECL_ISUPPORTS
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// nsIOutputStream interface
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NS_IMETHOD Close(void) {
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return NS_OK;
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}
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NS_IMETHOD Write(const char* aBuf, uint32_t aCount, uint32_t *aWriteCount) {
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PR_Write(PR_GetSpecialFD(PR_StandardOutput), aBuf, aCount);
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*aWriteCount = aCount;
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return NS_OK;
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}
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NS_IMETHOD
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WriteFrom(nsIInputStream *inStr, uint32_t count, uint32_t *_retval) {
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NS_NOTREACHED("WriteFrom");
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return NS_ERROR_NOT_IMPLEMENTED;
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}
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NS_IMETHOD
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WriteSegments(nsReadSegmentFun reader, void * closure, uint32_t count, uint32_t *_retval) {
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NS_NOTREACHED("WriteSegments");
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return NS_ERROR_NOT_IMPLEMENTED;
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}
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NS_IMETHOD
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IsNonBlocking(bool *aNonBlocking) {
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NS_NOTREACHED("IsNonBlocking");
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return NS_ERROR_NOT_IMPLEMENTED;
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}
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NS_IMETHOD Flush(void) {
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PR_Sync(PR_GetSpecialFD(PR_StandardOutput));
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return NS_OK;
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}
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};
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NS_IMPL_ISUPPORTS(ConsoleOutputStreamImpl, nsIOutputStream)
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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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fprintf(stderr, "usage: %s <url>\n", argv[0]);
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return 1;
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}
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NS_InitXPCOM2(nullptr, nullptr, nullptr);
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// Create a stream data source and initialize it on argv[1], which
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// is hopefully a "file:" URL.
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nsCOMPtr<nsIRDFDataSource> ds = do_CreateInstance(kRDFXMLDataSourceCID,
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&rv);
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RETURN_IF_FAILED(rv, "RDF/XML datasource creation");
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nsCOMPtr<nsIRDFRemoteDataSource> remote = do_QueryInterface(ds, &rv);
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RETURN_IF_FAILED(rv, "QI to nsIRDFRemoteDataSource");
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rv = remote->Init(argv[1]);
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RETURN_IF_FAILED(rv, "datasource initialization");
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// Okay, this should load the XML file...
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rv = remote->Refresh(false);
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RETURN_IF_FAILED(rv, "datasource refresh");
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// Pump events until the load is finished
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nsCOMPtr<nsIThread> thread = do_GetCurrentThread();
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bool done = false;
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while (!done) {
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NS_ENSURE_TRUE(NS_ProcessNextEvent(thread), 1);
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remote->GetLoaded(&done);
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}
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// And this should write it back out. The do_QI() on the pointer
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// is a hack to make sure that the new object gets AddRef()-ed.
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nsCOMPtr<nsIOutputStream> out =
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do_QueryInterface(new ConsoleOutputStreamImpl, &rv);
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RETURN_IF_FAILED(rv, "creation of console output stream");
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nsCOMPtr<nsIRDFXMLSource> source = do_QueryInterface(ds);
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RETURN_IF_FAILED(rv, "QI to nsIRDFXMLSource");
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rv = source->Serialize(out);
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RETURN_IF_FAILED(rv, "datasoure serialization");
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return 0;
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}
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