The Tor Browser: rdf/tests/rdfcat/rdfcat.cpp@6474c204b198

Cloned upstream origin tor-browser at tor-browser-31.3.0esr-4.5-1-build1
revision ID fc1c9ff7c1b2defdbc039f12214767608f46423f for hacking purpose.

     1 /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */

     2 /* This Source Code Form is subject to the terms of the Mozilla Public

     3  * License, v. 2.0. If a copy of the MPL was not distributed with this

     4  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */

     6 /*

     8   A simple test program that reads in RDF/XML into an in-memory data

     9   source, then uses the RDF/XML serialization API to write an

    10   equivalent (but not identical) RDF/XML file back to stdout.

    12   The program takes a single parameter: the URL from which to read.

    14  */

    16 #include <stdio.h>

    17 #include "nsXPCOM.h"

    18 #include "nsCOMPtr.h"

    19 #include "nsIComponentManager.h"

    20 #include "nsComponentManagerUtils.h"

    21 #include "nsServiceManagerUtils.h"

    22 #include "nsIIOService.h"

    23 #include "nsIInputStream.h"

    24 #include "nsIOutputStream.h"

    25 #include "nsIRDFCompositeDataSource.h"

    26 #include "nsIRDFNode.h"

    27 #include "nsIRDFRemoteDataSource.h"

    28 #include "nsIRDFService.h"

    29 #include "nsIRDFXMLSource.h"

    30 #include "nsIServiceManager.h"

    31 #include "nsIStreamListener.h"

    32 #include "nsIURL.h"

    33 #include "nsRDFCID.h"

    34 #include "nsThreadUtils.h"

    35 #include "plstr.h"

    36 #include "prio.h"

    37 #include "prthread.h"

    39 ////////////////////////////////////////////////////////////////////////

    40 // CIDs

    42 // rdf

    43 static NS_DEFINE_CID(kRDFXMLDataSourceCID,  NS_RDFXMLDATASOURCE_CID);

    45 ////////////////////////////////////////////////////////////////////////

    46 // Blatantly stolen from netwerk/test/

    47 #define RETURN_IF_FAILED(rv, step) \

    48     PR_BEGIN_MACRO \

    49     if (NS_FAILED(rv)) { \

    50         printf(">>> %s failed: rv=%x\n", step, static_cast<uint32_t>(rv)); \

    51         return 1;\

    52     } \

    53     PR_END_MACRO

    55 ////////////////////////////////////////////////////////////////////////

    57 class ConsoleOutputStreamImpl : public nsIOutputStream

    58 {

    59 public:

    60     ConsoleOutputStreamImpl(void) {}

    61     virtual ~ConsoleOutputStreamImpl(void) {}

    63     // nsISupports interface

    64     NS_DECL_ISUPPORTS

    66     // nsIOutputStream interface

    67     NS_IMETHOD Close(void) {

    68         return NS_OK;

    69     }

    71     NS_IMETHOD Write(const char* aBuf, uint32_t aCount, uint32_t *aWriteCount) {

    72         PR_Write(PR_GetSpecialFD(PR_StandardOutput), aBuf, aCount);

    73         *aWriteCount = aCount;

    74         return NS_OK;

    75     }

    77     NS_IMETHOD

    78     WriteFrom(nsIInputStream *inStr, uint32_t count, uint32_t *_retval) {

    79         NS_NOTREACHED("WriteFrom");

    80         return NS_ERROR_NOT_IMPLEMENTED;

    81     }

    83     NS_IMETHOD

    84     WriteSegments(nsReadSegmentFun reader, void * closure, uint32_t count, uint32_t *_retval) {

    85         NS_NOTREACHED("WriteSegments");

    86         return NS_ERROR_NOT_IMPLEMENTED;

    87     }

    89     NS_IMETHOD

    90     IsNonBlocking(bool *aNonBlocking) {

    91         NS_NOTREACHED("IsNonBlocking");

    92         return NS_ERROR_NOT_IMPLEMENTED;

    93     }

    95     NS_IMETHOD Flush(void) {

    96         PR_Sync(PR_GetSpecialFD(PR_StandardOutput));

    97         return NS_OK;

    98     }

    99 };

   101 NS_IMPL_ISUPPORTS(ConsoleOutputStreamImpl, nsIOutputStream)

   103 ////////////////////////////////////////////////////////////////////////

   105 int

   106 main(int argc, char** argv)

   107 {

   108     nsresult rv;

   110     if (argc < 2) {

   111         fprintf(stderr, "usage: %s <url>\n", argv[0]);

   112         return 1;

   113     }

   115     NS_InitXPCOM2(nullptr, nullptr, nullptr);

   117     // Create a stream data source and initialize it on argv[1], which

   118     // is hopefully a "file:" URL.

   119     nsCOMPtr<nsIRDFDataSource> ds = do_CreateInstance(kRDFXMLDataSourceCID,

   120                                                       &rv);

   121     RETURN_IF_FAILED(rv, "RDF/XML datasource creation");

   123     nsCOMPtr<nsIRDFRemoteDataSource> remote = do_QueryInterface(ds, &rv);

   124     RETURN_IF_FAILED(rv, "QI to nsIRDFRemoteDataSource");

   126     rv = remote->Init(argv[1]);

   127     RETURN_IF_FAILED(rv, "datasource initialization");

   129     // Okay, this should load the XML file...

   130     rv = remote->Refresh(false);

   131     RETURN_IF_FAILED(rv, "datasource refresh");

   133     // Pump events until the load is finished

   134     nsCOMPtr<nsIThread> thread = do_GetCurrentThread();

   135     bool done = false;

   136     while (!done) {

   137         NS_ENSURE_TRUE(NS_ProcessNextEvent(thread), 1);

   138         remote->GetLoaded(&done);

   139     }

   141     // And this should write it back out. The do_QI() on the pointer

   142     // is a hack to make sure that the new object gets AddRef()-ed.

   143     nsCOMPtr<nsIOutputStream> out =

   144         do_QueryInterface(new ConsoleOutputStreamImpl, &rv);

   145     RETURN_IF_FAILED(rv, "creation of console output stream");

   147     nsCOMPtr<nsIRDFXMLSource> source = do_QueryInterface(ds);

   148     RETURN_IF_FAILED(rv, "QI to nsIRDFXMLSource");

   150     rv = source->Serialize(out);

   151     RETURN_IF_FAILED(rv, "datasoure serialization");

   153     return 0;

   154 }

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