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/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*-
*
* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
#include "nsRDFXMLParser.h"
#include "nsIComponentManager.h"
#include "nsIParser.h"
#include "nsCharsetSource.h"
#include "nsIRDFContentSink.h"
#include "nsParserCIID.h"
#include "nsStringStream.h"
#include "nsNetUtil.h"
#include "nsNullPrincipal.h"
static NS_DEFINE_CID(kParserCID, NS_PARSER_CID);
NS_IMPL_ISUPPORTS(nsRDFXMLParser, nsIRDFXMLParser)
nsresult
nsRDFXMLParser::Create(nsISupports* aOuter, REFNSIID aIID, void** aResult)
{
if (aOuter)
return NS_ERROR_NO_AGGREGATION;
nsRDFXMLParser* result = new nsRDFXMLParser();
if (! result)
return NS_ERROR_OUT_OF_MEMORY;
nsresult rv;
NS_ADDREF(result);
rv = result->QueryInterface(aIID, aResult);
NS_RELEASE(result);
return rv;
}
nsRDFXMLParser::nsRDFXMLParser()
{
MOZ_COUNT_CTOR(nsRDFXMLParser);
}
nsRDFXMLParser::~nsRDFXMLParser()
{
MOZ_COUNT_DTOR(nsRDFXMLParser);
}
NS_IMETHODIMP
nsRDFXMLParser::ParseAsync(nsIRDFDataSource* aSink, nsIURI* aBaseURI, nsIStreamListener** aResult)
{
nsresult rv;
nsCOMPtr<nsIRDFContentSink> sink =
do_CreateInstance("@mozilla.org/rdf/content-sink;1", &rv);
if (NS_FAILED(rv)) return rv;
rv = sink->Init(aBaseURI);
if (NS_FAILED(rv)) return rv;
// We set the content sink's data source directly to our in-memory
// store. This allows the initial content to be generated "directly".
rv = sink->SetDataSource(aSink);
if (NS_FAILED(rv)) return rv;
nsCOMPtr<nsIParser> parser = do_CreateInstance(kParserCID, &rv);
if (NS_FAILED(rv)) return rv;
parser->SetDocumentCharset(NS_LITERAL_CSTRING("UTF-8"),
kCharsetFromDocTypeDefault);
parser->SetContentSink(sink);
rv = parser->Parse(aBaseURI);
if (NS_FAILED(rv)) return rv;
return CallQueryInterface(parser, aResult);
}
NS_IMETHODIMP
nsRDFXMLParser::ParseString(nsIRDFDataSource* aSink, nsIURI* aBaseURI, const nsACString& aString)
{
nsresult rv;
nsCOMPtr<nsIRDFContentSink> sink =
do_CreateInstance("@mozilla.org/rdf/content-sink;1", &rv);
if (NS_FAILED(rv)) return rv;
rv = sink->Init(aBaseURI);
if (NS_FAILED(rv)) return rv;
// We set the content sink's data source directly to our in-memory
// store. This allows the initial content to be generated "directly".
rv = sink->SetDataSource(aSink);
if (NS_FAILED(rv)) return rv;
nsCOMPtr<nsIParser> parser = do_CreateInstance(kParserCID, &rv);
if (NS_FAILED(rv)) return rv;
parser->SetDocumentCharset(NS_LITERAL_CSTRING("UTF-8"),
kCharsetFromOtherComponent);
parser->SetContentSink(sink);
rv = parser->Parse(aBaseURI);
if (NS_FAILED(rv)) return rv;
nsCOMPtr<nsIStreamListener> listener =
do_QueryInterface(parser);
if (! listener)
return NS_ERROR_FAILURE;
nsCOMPtr<nsIInputStream> stream;
rv = NS_NewCStringInputStream(getter_AddRefs(stream), aString);
if (NS_FAILED(rv)) return rv;
nsCOMPtr<nsIPrincipal> nullPrincipal = nsNullPrincipal::Create();
// The following channel is never openend, so it does not matter what
// securityFlags we pass; let's follow the principle of least privilege.
nsCOMPtr<nsIChannel> channel;
rv = NS_NewInputStreamChannel(getter_AddRefs(channel),
aBaseURI,
stream,
nullPrincipal,
nsILoadInfo::SEC_REQUIRE_SAME_ORIGIN_DATA_IS_BLOCKED,
nsIContentPolicy::TYPE_OTHER,
NS_LITERAL_CSTRING("text/xml"));
if (NS_FAILED(rv)) return rv;
listener->OnStartRequest(channel, nullptr);
listener->OnDataAvailable(channel, nullptr, stream, 0, aString.Length());
listener->OnStopRequest(channel, nullptr, NS_OK);
return NS_OK;
}
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