michael@0: /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
michael@0: /* This Source Code Form is subject to the terms of the Mozilla Public
michael@0:  * License, v. 2.0. If a copy of the MPL was not distributed with this
michael@0:  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
michael@0: 
michael@0: /*
michael@0: 
michael@0:   A simple test program that reads in RDF/XML into an in-memory data
michael@0:   source, then uses the RDF/XML serialization API to write an
michael@0:   equivalent (but not identical) RDF/XML file back to stdout.
michael@0: 
michael@0:   The program takes a single parameter: the URL from which to read.
michael@0: 
michael@0:  */
michael@0: 
michael@0: #include <stdio.h>
michael@0: #include "nsXPCOM.h"
michael@0: #include "nsCOMPtr.h"
michael@0: #include "nsIComponentManager.h"
michael@0: #include "nsComponentManagerUtils.h"
michael@0: #include "nsServiceManagerUtils.h"
michael@0: #include "nsIIOService.h"
michael@0: #include "nsIInputStream.h"
michael@0: #include "nsIOutputStream.h"
michael@0: #include "nsIRDFCompositeDataSource.h"
michael@0: #include "nsIRDFNode.h"
michael@0: #include "nsIRDFRemoteDataSource.h"
michael@0: #include "nsIRDFService.h"
michael@0: #include "nsIRDFXMLSource.h"
michael@0: #include "nsIServiceManager.h"
michael@0: #include "nsIStreamListener.h"
michael@0: #include "nsIURL.h"
michael@0: #include "nsRDFCID.h"
michael@0: #include "nsThreadUtils.h"
michael@0: #include "plstr.h"
michael@0: #include "prio.h"
michael@0: #include "prthread.h"
michael@0: 
michael@0: ////////////////////////////////////////////////////////////////////////
michael@0: // CIDs
michael@0: 
michael@0: // rdf
michael@0: static NS_DEFINE_CID(kRDFXMLDataSourceCID,  NS_RDFXMLDATASOURCE_CID);
michael@0: 
michael@0: ////////////////////////////////////////////////////////////////////////
michael@0: // Blatantly stolen from netwerk/test/
michael@0: #define RETURN_IF_FAILED(rv, step) \
michael@0:     PR_BEGIN_MACRO \
michael@0:     if (NS_FAILED(rv)) { \
michael@0:         printf(">>> %s failed: rv=%x\n", step, static_cast<uint32_t>(rv)); \
michael@0:         return 1;\
michael@0:     } \
michael@0:     PR_END_MACRO
michael@0: 
michael@0: ////////////////////////////////////////////////////////////////////////
michael@0: 
michael@0: class ConsoleOutputStreamImpl : public nsIOutputStream
michael@0: {
michael@0: public:
michael@0:     ConsoleOutputStreamImpl(void) {}
michael@0:     virtual ~ConsoleOutputStreamImpl(void) {}
michael@0: 
michael@0:     // nsISupports interface
michael@0:     NS_DECL_ISUPPORTS
michael@0: 
michael@0:     // nsIOutputStream interface
michael@0:     NS_IMETHOD Close(void) {
michael@0:         return NS_OK;
michael@0:     }
michael@0: 
michael@0:     NS_IMETHOD Write(const char* aBuf, uint32_t aCount, uint32_t *aWriteCount) {
michael@0:         PR_Write(PR_GetSpecialFD(PR_StandardOutput), aBuf, aCount);
michael@0:         *aWriteCount = aCount;
michael@0:         return NS_OK;
michael@0:     }
michael@0: 
michael@0:     NS_IMETHOD
michael@0:     WriteFrom(nsIInputStream *inStr, uint32_t count, uint32_t *_retval) {
michael@0:         NS_NOTREACHED("WriteFrom");
michael@0:         return NS_ERROR_NOT_IMPLEMENTED;
michael@0:     }
michael@0: 
michael@0:     NS_IMETHOD
michael@0:     WriteSegments(nsReadSegmentFun reader, void * closure, uint32_t count, uint32_t *_retval) {
michael@0:         NS_NOTREACHED("WriteSegments");
michael@0:         return NS_ERROR_NOT_IMPLEMENTED;
michael@0:     }
michael@0: 
michael@0:     NS_IMETHOD
michael@0:     IsNonBlocking(bool *aNonBlocking) {
michael@0:         NS_NOTREACHED("IsNonBlocking");
michael@0:         return NS_ERROR_NOT_IMPLEMENTED;
michael@0:     }
michael@0: 
michael@0:     NS_IMETHOD Flush(void) {
michael@0:         PR_Sync(PR_GetSpecialFD(PR_StandardOutput));
michael@0:         return NS_OK;
michael@0:     }
michael@0: };
michael@0: 
michael@0: NS_IMPL_ISUPPORTS(ConsoleOutputStreamImpl, nsIOutputStream)
michael@0: 
michael@0: ////////////////////////////////////////////////////////////////////////
michael@0: 
michael@0: int
michael@0: main(int argc, char** argv)
michael@0: {
michael@0:     nsresult rv;
michael@0: 
michael@0:     if (argc < 2) {
michael@0:         fprintf(stderr, "usage: %s <url>\n", argv[0]);
michael@0:         return 1;
michael@0:     }
michael@0: 
michael@0:     NS_InitXPCOM2(nullptr, nullptr, nullptr);
michael@0: 
michael@0:     // Create a stream data source and initialize it on argv[1], which
michael@0:     // is hopefully a "file:" URL.
michael@0:     nsCOMPtr<nsIRDFDataSource> ds = do_CreateInstance(kRDFXMLDataSourceCID,
michael@0:                                                       &rv);
michael@0:     RETURN_IF_FAILED(rv, "RDF/XML datasource creation");
michael@0: 
michael@0:     nsCOMPtr<nsIRDFRemoteDataSource> remote = do_QueryInterface(ds, &rv);
michael@0:     RETURN_IF_FAILED(rv, "QI to nsIRDFRemoteDataSource");
michael@0: 
michael@0:     rv = remote->Init(argv[1]);
michael@0:     RETURN_IF_FAILED(rv, "datasource initialization");
michael@0: 
michael@0:     // Okay, this should load the XML file...
michael@0:     rv = remote->Refresh(false);
michael@0:     RETURN_IF_FAILED(rv, "datasource refresh");
michael@0: 
michael@0:     // Pump events until the load is finished
michael@0:     nsCOMPtr<nsIThread> thread = do_GetCurrentThread();
michael@0:     bool done = false;
michael@0:     while (!done) {
michael@0:         NS_ENSURE_TRUE(NS_ProcessNextEvent(thread), 1);
michael@0:         remote->GetLoaded(&done);
michael@0:     }
michael@0: 
michael@0:     // And this should write it back out. The do_QI() on the pointer
michael@0:     // is a hack to make sure that the new object gets AddRef()-ed.
michael@0:     nsCOMPtr<nsIOutputStream> out =
michael@0:         do_QueryInterface(new ConsoleOutputStreamImpl, &rv);
michael@0:     RETURN_IF_FAILED(rv, "creation of console output stream");
michael@0: 
michael@0:     nsCOMPtr<nsIRDFXMLSource> source = do_QueryInterface(ds);
michael@0:     RETURN_IF_FAILED(rv, "QI to nsIRDFXMLSource");
michael@0: 
michael@0:     rv = source->Serialize(out);
michael@0:     RETURN_IF_FAILED(rv, "datasoure serialization");
michael@0: 
michael@0:     return 0;
michael@0: }