mirror of
https://github.com/mozilla/gecko-dev.git
synced 2024-11-01 06:35:42 +00:00
1e6cdad33c
There's a better way to create null principals than
do_CreateInstance("@mozilla.org/nullprincipal;1"). Let's do that and
save ourselves some XPCOM overhead.
137 lines
3.9 KiB
C++
137 lines
3.9 KiB
C++
/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*-
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*
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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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#include "nsRDFXMLParser.h"
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#include "nsIComponentManager.h"
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#include "nsIParser.h"
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#include "nsCharsetSource.h"
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#include "nsIRDFContentSink.h"
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#include "nsParserCIID.h"
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#include "nsStringStream.h"
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#include "nsNetUtil.h"
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#include "nsNullPrincipal.h"
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static NS_DEFINE_CID(kParserCID, NS_PARSER_CID);
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NS_IMPL_ISUPPORTS(nsRDFXMLParser, nsIRDFXMLParser)
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nsresult
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nsRDFXMLParser::Create(nsISupports* aOuter, REFNSIID aIID, void** aResult)
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{
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if (aOuter)
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return NS_ERROR_NO_AGGREGATION;
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nsRDFXMLParser* result = new nsRDFXMLParser();
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if (! result)
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return NS_ERROR_OUT_OF_MEMORY;
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nsresult rv;
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NS_ADDREF(result);
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rv = result->QueryInterface(aIID, aResult);
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NS_RELEASE(result);
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return rv;
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}
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nsRDFXMLParser::nsRDFXMLParser()
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{
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MOZ_COUNT_CTOR(nsRDFXMLParser);
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}
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nsRDFXMLParser::~nsRDFXMLParser()
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{
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MOZ_COUNT_DTOR(nsRDFXMLParser);
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}
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NS_IMETHODIMP
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nsRDFXMLParser::ParseAsync(nsIRDFDataSource* aSink, nsIURI* aBaseURI, nsIStreamListener** aResult)
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{
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nsresult rv;
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nsCOMPtr<nsIRDFContentSink> sink =
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do_CreateInstance("@mozilla.org/rdf/content-sink;1", &rv);
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if (NS_FAILED(rv)) return rv;
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rv = sink->Init(aBaseURI);
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if (NS_FAILED(rv)) return rv;
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// We set the content sink's data source directly to our in-memory
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// store. This allows the initial content to be generated "directly".
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rv = sink->SetDataSource(aSink);
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if (NS_FAILED(rv)) return rv;
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nsCOMPtr<nsIParser> parser = do_CreateInstance(kParserCID, &rv);
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if (NS_FAILED(rv)) return rv;
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parser->SetDocumentCharset(NS_LITERAL_CSTRING("UTF-8"),
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kCharsetFromDocTypeDefault);
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parser->SetContentSink(sink);
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rv = parser->Parse(aBaseURI);
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if (NS_FAILED(rv)) return rv;
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return CallQueryInterface(parser, aResult);
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}
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NS_IMETHODIMP
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nsRDFXMLParser::ParseString(nsIRDFDataSource* aSink, nsIURI* aBaseURI, const nsACString& aString)
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{
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nsresult rv;
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nsCOMPtr<nsIRDFContentSink> sink =
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do_CreateInstance("@mozilla.org/rdf/content-sink;1", &rv);
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if (NS_FAILED(rv)) return rv;
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rv = sink->Init(aBaseURI);
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if (NS_FAILED(rv)) return rv;
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// We set the content sink's data source directly to our in-memory
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// store. This allows the initial content to be generated "directly".
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rv = sink->SetDataSource(aSink);
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if (NS_FAILED(rv)) return rv;
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nsCOMPtr<nsIParser> parser = do_CreateInstance(kParserCID, &rv);
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if (NS_FAILED(rv)) return rv;
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parser->SetDocumentCharset(NS_LITERAL_CSTRING("UTF-8"),
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kCharsetFromOtherComponent);
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parser->SetContentSink(sink);
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rv = parser->Parse(aBaseURI);
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if (NS_FAILED(rv)) return rv;
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nsCOMPtr<nsIStreamListener> listener =
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do_QueryInterface(parser);
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if (! listener)
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return NS_ERROR_FAILURE;
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nsCOMPtr<nsIInputStream> stream;
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rv = NS_NewCStringInputStream(getter_AddRefs(stream), aString);
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if (NS_FAILED(rv)) return rv;
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nsCOMPtr<nsIPrincipal> nullPrincipal = nsNullPrincipal::Create();
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NS_ENSURE_TRUE(nullPrincipal, NS_ERROR_FAILURE);
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nsCOMPtr<nsIChannel> channel;
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rv = NS_NewInputStreamChannel(getter_AddRefs(channel),
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aBaseURI,
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stream,
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nullPrincipal,
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nsILoadInfo::SEC_NORMAL,
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nsIContentPolicy::TYPE_OTHER,
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NS_LITERAL_CSTRING("text/xml"));
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if (NS_FAILED(rv)) return rv;
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listener->OnStartRequest(channel, nullptr);
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listener->OnDataAvailable(channel, nullptr, stream, 0, aString.Length());
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listener->OnStopRequest(channel, nullptr, NS_OK);
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return NS_OK;
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}
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