зеркало из https://github.com/mozilla/pjs.git
488 строки
14 KiB
C++
488 строки
14 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* ***** BEGIN LICENSE BLOCK *****
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* Version: MPL 1.1/GPL 2.0/LGPL 2.1
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*
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* The contents of this file are subject to the Mozilla Public License Version
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* 1.1 (the "License"); you may not use this file except in compliance with
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* the License. You may obtain a copy of the License at
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* http://www.mozilla.org/MPL/
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*
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* Software distributed under the License is distributed on an "AS IS" basis,
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* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
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* for the specific language governing rights and limitations under the
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* License.
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*
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* The Original Code is the Mozilla Communicator client code.
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*
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* The Initial Developer of the Original Code is
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* Netscape Communications Corporation.
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* Portions created by the Initial Developer are Copyright (C) 1998-2001
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* the Initial Developer. All Rights Reserved.
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*
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* Contributor(s):
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* Chris Waterson <waterson@netscape.com>
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* Robert John Churchill <rjc@netscape.com>
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* Pierre Phaneuf <pp@ludusdesign.com>
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* Bradley Baetz <bbaetz@cs.mcgill.ca>
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*
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* Alternatively, the contents of this file may be used under the terms of
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* either the GNU General Public License Version 2 or later (the "GPL"), or
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* the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
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* in which case the provisions of the GPL or the LGPL are applicable instead
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* of those above. If you wish to allow use of your version of this file only
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* under the terms of either the GPL or the LGPL, and not to allow others to
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* use your version of this file under the terms of the MPL, indicate your
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* decision by deleting the provisions above and replace them with the notice
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* and other provisions required by the GPL or the LGPL. If you do not delete
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* the provisions above, a recipient may use your version of this file under
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* the terms of any one of the MPL, the GPL or the LGPL.
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*
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* ***** END LICENSE BLOCK ***** */
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/* This parsing code originally lived in xpfe/components/directory/ - bbaetz */
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#include "prprf.h"
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#include "nsDirIndexParser.h"
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#include "nsReadableUtils.h"
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#include "nsDirIndex.h"
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#include "nsEscape.h"
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#include "nsIServiceManager.h"
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#include "nsIInputStream.h"
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#include "nsIChannel.h"
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#include "nsIURI.h"
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#include "nsCRT.h"
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#include "nsIPrefService.h"
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#include "nsIPrefBranch.h"
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#include "nsIPrefLocalizedString.h"
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NS_IMPL_ISUPPORTS3(nsDirIndexParser,
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nsIRequestObserver,
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nsIStreamListener,
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nsIDirIndexParser)
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nsDirIndexParser::nsDirIndexParser() {
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}
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nsresult
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nsDirIndexParser::Init() {
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mLineStart = 0;
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mHasDescription = PR_FALSE;
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mFormat = nsnull;
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// get default charset to be used for directory listings (fallback to
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// ISO-8859-1 if pref is unavailable).
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NS_NAMED_LITERAL_CSTRING(kFallbackEncoding, "ISO-8859-1");
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nsXPIDLString defCharset;
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nsCOMPtr<nsIPrefBranch> prefs(do_GetService(NS_PREFSERVICE_CONTRACTID));
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if (prefs) {
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nsCOMPtr<nsIPrefLocalizedString> prefVal;
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prefs->GetComplexValue("intl.charset.default",
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NS_GET_IID(nsIPrefLocalizedString),
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getter_AddRefs(prefVal));
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if (prefVal)
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prefVal->ToString(getter_Copies(defCharset));
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}
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if (!defCharset.IsEmpty())
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LossyCopyUTF16toASCII(defCharset, mEncoding); // charset labels are always ASCII
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else
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mEncoding.Assign(kFallbackEncoding);
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nsresult rv;
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// XXX not threadsafe
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if (gRefCntParser++ == 0)
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rv = CallGetService(NS_ITEXTTOSUBURI_CONTRACTID, &gTextToSubURI);
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else
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rv = NS_OK;
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return rv;
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}
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nsDirIndexParser::~nsDirIndexParser() {
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delete[] mFormat;
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// XXX not threadsafe
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if (--gRefCntParser == 0) {
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NS_IF_RELEASE(gTextToSubURI);
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}
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}
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NS_IMETHODIMP
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nsDirIndexParser::SetListener(nsIDirIndexListener* aListener) {
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mListener = aListener;
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return NS_OK;
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}
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NS_IMETHODIMP
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nsDirIndexParser::GetListener(nsIDirIndexListener** aListener) {
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NS_IF_ADDREF(*aListener = mListener.get());
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return NS_OK;
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}
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NS_IMETHODIMP
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nsDirIndexParser::GetComment(char** aComment) {
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*aComment = ToNewCString(mComment);
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if (!*aComment)
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return NS_ERROR_OUT_OF_MEMORY;
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return NS_OK;
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}
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NS_IMETHODIMP
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nsDirIndexParser::SetEncoding(const char* aEncoding) {
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mEncoding.Assign(aEncoding);
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return NS_OK;
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}
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NS_IMETHODIMP
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nsDirIndexParser::GetEncoding(char** aEncoding) {
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*aEncoding = ToNewCString(mEncoding);
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if (!*aEncoding)
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return NS_ERROR_OUT_OF_MEMORY;
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return NS_OK;
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}
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NS_IMETHODIMP
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nsDirIndexParser::OnStartRequest(nsIRequest* aRequest, nsISupports* aCtxt) {
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return NS_OK;
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}
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NS_IMETHODIMP
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nsDirIndexParser::OnStopRequest(nsIRequest *aRequest, nsISupports *aCtxt,
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nsresult aStatusCode) {
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// Finish up
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if (mBuf.Length() > (PRUint32) mLineStart) {
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ProcessData(aRequest, aCtxt);
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}
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return NS_OK;
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}
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nsDirIndexParser::Field
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nsDirIndexParser::gFieldTable[] = {
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{ "Filename", FIELD_FILENAME },
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{ "Description", FIELD_DESCRIPTION },
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{ "Content-Length", FIELD_CONTENTLENGTH },
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{ "Last-Modified", FIELD_LASTMODIFIED },
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{ "Content-Type", FIELD_CONTENTTYPE },
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{ "File-Type", FIELD_FILETYPE },
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{ nsnull, FIELD_UNKNOWN }
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};
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nsrefcnt nsDirIndexParser::gRefCntParser = 0;
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nsITextToSubURI *nsDirIndexParser::gTextToSubURI;
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nsresult
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nsDirIndexParser::ParseFormat(const char* aFormatStr) {
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// Parse a "200" format line, and remember the fields and their
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// ordering in mFormat. Multiple 200 lines stomp on each other.
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// Lets find out how many elements we have.
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// easier to do this then realloc
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const char* pos = aFormatStr;
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unsigned int num = 0;
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do {
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while (*pos && nsCRT::IsAsciiSpace(PRUnichar(*pos)))
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++pos;
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++num;
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// There are a maximum of six allowed header fields (doubled plus
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// terminator, just in case) -- Bug 443299
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if (num > (2 * NS_ARRAY_LENGTH(gFieldTable)))
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return NS_ERROR_UNEXPECTED;
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if (! *pos)
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break;
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while (*pos && !nsCRT::IsAsciiSpace(PRUnichar(*pos)))
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++pos;
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} while (*pos);
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delete[] mFormat;
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mFormat = new int[num+1];
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// Prevent NULL Deref - Bug 443299
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if (mFormat == nsnull)
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return NS_ERROR_OUT_OF_MEMORY;
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mFormat[num] = -1;
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int formatNum=0;
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do {
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while (*aFormatStr && nsCRT::IsAsciiSpace(PRUnichar(*aFormatStr)))
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++aFormatStr;
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if (! *aFormatStr)
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break;
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nsCAutoString name;
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PRInt32 len = 0;
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while (aFormatStr[len] && !nsCRT::IsAsciiSpace(PRUnichar(aFormatStr[len])))
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++len;
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name.SetCapacity(len + 1);
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name.Append(aFormatStr, len);
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aFormatStr += len;
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// Okay, we're gonna monkey with the nsStr. Bold!
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name.SetLength(nsUnescapeCount(name.BeginWriting()));
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// All tokens are case-insensitive - http://www.mozilla.org/projects/netlib/dirindexformat.html
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if (name.LowerCaseEqualsLiteral("description"))
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mHasDescription = PR_TRUE;
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for (Field* i = gFieldTable; i->mName; ++i) {
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if (name.EqualsIgnoreCase(i->mName)) {
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mFormat[formatNum] = i->mType;
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++formatNum;
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break;
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}
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}
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} while (*aFormatStr);
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return NS_OK;
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}
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nsresult
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nsDirIndexParser::ParseData(nsIDirIndex *aIdx, char* aDataStr) {
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// Parse a "201" data line, using the field ordering specified in
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// mFormat.
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if (!mFormat) {
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// Ignore if we haven't seen a format yet.
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return NS_OK;
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}
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nsresult rv = NS_OK;
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nsCAutoString filename;
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for (PRInt32 i = 0; mFormat[i] != -1; ++i) {
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// If we've exhausted the data before we run out of fields, just
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// bail.
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if (! *aDataStr)
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break;
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while (*aDataStr && nsCRT::IsAsciiSpace(*aDataStr))
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++aDataStr;
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char *value = aDataStr;
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if (*aDataStr == '"' || *aDataStr == '\'') {
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// it's a quoted string. snarf everything up to the next quote character
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const char quotechar = *(aDataStr++);
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++value;
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while (*aDataStr && *aDataStr != quotechar)
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++aDataStr;
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*aDataStr++ = '\0';
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if (! aDataStr) {
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NS_WARNING("quoted value not terminated");
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}
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} else {
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// it's unquoted. snarf until we see whitespace.
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value = aDataStr;
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while (*aDataStr && (!nsCRT::IsAsciiSpace(*aDataStr)))
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++aDataStr;
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*aDataStr++ = '\0';
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}
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fieldType t = fieldType(mFormat[i]);
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switch (t) {
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case FIELD_FILENAME: {
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// don't unescape at this point, so that UnEscapeAndConvert() can
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filename = value;
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PRBool success = PR_FALSE;
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nsAutoString entryuri;
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if (gTextToSubURI) {
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PRUnichar *result = nsnull;
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if (NS_SUCCEEDED(rv = gTextToSubURI->UnEscapeAndConvert(mEncoding.get(), filename.get(),
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&result)) && (result)) {
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if (*result) {
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aIdx->SetLocation(filename.get());
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if (!mHasDescription)
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aIdx->SetDescription(result);
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success = PR_TRUE;
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}
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NS_Free(result);
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} else {
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NS_WARNING("UnEscapeAndConvert error");
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}
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}
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if (!success) {
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// if unsuccessfully at charset conversion, then
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// just fallback to unescape'ing in-place
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// XXX - this shouldn't be using UTF8, should it?
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// when can we fail to get the service, anyway? - bbaetz
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aIdx->SetLocation(filename.get());
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if (!mHasDescription) {
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aIdx->SetDescription(NS_ConvertUTF8toUTF16(value).get());
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}
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}
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}
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break;
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case FIELD_DESCRIPTION:
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nsUnescape(value);
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aIdx->SetDescription(NS_ConvertUTF8toUTF16(value).get());
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break;
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case FIELD_CONTENTLENGTH:
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{
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PRInt64 len;
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PRInt32 status = PR_sscanf(value, "%lld", &len);
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if (status == 1)
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aIdx->SetSize(len);
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else
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aIdx->SetSize(LL_MAXUINT); // LL_MAXUINT means unknown
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}
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break;
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case FIELD_LASTMODIFIED:
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{
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PRTime tm;
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nsUnescape(value);
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if (PR_ParseTimeString(value, PR_FALSE, &tm) == PR_SUCCESS) {
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aIdx->SetLastModified(tm);
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}
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}
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break;
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case FIELD_CONTENTTYPE:
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aIdx->SetContentType(value);
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break;
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case FIELD_FILETYPE:
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// unescape in-place
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nsUnescape(value);
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if (!nsCRT::strcasecmp(value, "directory")) {
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aIdx->SetType(nsIDirIndex::TYPE_DIRECTORY);
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} else if (!nsCRT::strcasecmp(value, "file")) {
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aIdx->SetType(nsIDirIndex::TYPE_FILE);
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} else if (!nsCRT::strcasecmp(value, "symbolic-link")) {
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aIdx->SetType(nsIDirIndex::TYPE_SYMLINK);
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} else {
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aIdx->SetType(nsIDirIndex::TYPE_UNKNOWN);
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}
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break;
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case FIELD_UNKNOWN:
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// ignore
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break;
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}
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}
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return NS_OK;
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}
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NS_IMETHODIMP
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nsDirIndexParser::OnDataAvailable(nsIRequest *aRequest, nsISupports *aCtxt,
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nsIInputStream *aStream,
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PRUint32 aSourceOffset,
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PRUint32 aCount) {
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if (aCount < 1)
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return NS_OK;
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PRInt32 len = mBuf.Length();
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// Ensure that our mBuf has capacity to hold the data we're about to
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// read.
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if (!EnsureStringLength(mBuf, len + aCount))
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return NS_ERROR_OUT_OF_MEMORY;
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// Now read the data into our buffer.
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nsresult rv;
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PRUint32 count;
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rv = aStream->Read(mBuf.BeginWriting() + len, aCount, &count);
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if (NS_FAILED(rv)) return rv;
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// Set the string's length according to the amount of data we've read.
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// Note: we know this to work on nsCString. This isn't guaranteed to
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// work on other strings.
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mBuf.SetLength(len + count);
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return ProcessData(aRequest, aCtxt);
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}
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nsresult
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nsDirIndexParser::ProcessData(nsIRequest *aRequest, nsISupports *aCtxt) {
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if (!mListener)
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return NS_ERROR_FAILURE;
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PRInt32 numItems = 0;
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while(PR_TRUE) {
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++numItems;
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PRInt32 eol = mBuf.FindCharInSet("\n\r", mLineStart);
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if (eol < 0) break;
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mBuf.SetCharAt(PRUnichar('\0'), eol);
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const char *line = mBuf.get() + mLineStart;
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PRInt32 lineLen = eol - mLineStart;
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mLineStart = eol + 1;
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if (lineLen >= 4) {
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nsresult rv;
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const char *buf = line;
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if (buf[0] == '1') {
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if (buf[1] == '0') {
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if (buf[2] == '0' && buf[3] == ':') {
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// 100. Human-readable comment line. Ignore
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} else if (buf[2] == '1' && buf[3] == ':') {
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// 101. Human-readable information line.
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mComment.Append(buf + 4);
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char *value = ((char *)buf) + 4;
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nsUnescape(value);
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mListener->OnInformationAvailable(aRequest, aCtxt, NS_ConvertUTF8toUTF16(value));
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} else if (buf[2] == '2' && buf[3] == ':') {
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// 102. Human-readable information line, HTML.
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mComment.Append(buf + 4);
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}
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}
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} else if (buf[0] == '2') {
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if (buf[1] == '0') {
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if (buf[2] == '0' && buf[3] == ':') {
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// 200. Define field names
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rv = ParseFormat(buf + 4);
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if (NS_FAILED(rv)) {
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return rv;
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}
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} else if (buf[2] == '1' && buf[3] == ':') {
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// 201. Field data
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nsCOMPtr<nsIDirIndex> idx = do_CreateInstance("@mozilla.org/dirIndex;1",&rv);
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if (NS_FAILED(rv))
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return rv;
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rv = ParseData(idx, ((char *)buf) + 4);
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if (NS_FAILED(rv)) {
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return rv;
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}
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mListener->OnIndexAvailable(aRequest, aCtxt, idx);
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}
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}
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} else if (buf[0] == '3') {
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if (buf[1] == '0') {
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if (buf[2] == '0' && buf[3] == ':') {
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// 300. Self-referring URL
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} else if (buf[2] == '1' && buf[3] == ':') {
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// 301. OUR EXTENSION - encoding
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int i = 4;
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while (buf[i] && nsCRT::IsAsciiSpace(buf[i]))
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++i;
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if (buf[i])
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SetEncoding(buf+i);
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}
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}
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}
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}
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}
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return NS_OK;
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}
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