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pjs/netwerk/streamconv/converters/nsDirIndexParser.cpp

482 строки
14 KiB
C++
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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* ***** BEGIN LICENSE BLOCK *****
* Version: MPL 1.1/GPL 2.0/LGPL 2.1
*
* The contents of this file are subject to the Mozilla Public License Version
* 1.1 (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
* http://www.mozilla.org/MPL/
*
* Software distributed under the License is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
* for the specific language governing rights and limitations under the
* License.
*
* The Original Code is the Mozilla Communicator client code.
*
* The Initial Developer of the Original Code is
* Netscape Communications Corporation.
* Portions created by the Initial Developer are Copyright (C) 1998-2001
* the Initial Developer. All Rights Reserved.
*
* Contributor(s):
* Chris Waterson <waterson@netscape.com>
* Robert John Churchill <rjc@netscape.com>
* Pierre Phaneuf <pp@ludusdesign.com>
* Bradley Baetz <bbaetz@cs.mcgill.ca>
*
* Alternatively, the contents of this file may be used under the terms of
* either the GNU General Public License Version 2 or later (the "GPL"), or
* the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
* in which case the provisions of the GPL or the LGPL are applicable instead
* of those above. If you wish to allow use of your version of this file only
* under the terms of either the GPL or the LGPL, and not to allow others to
* use your version of this file under the terms of the MPL, indicate your
* decision by deleting the provisions above and replace them with the notice
* and other provisions required by the GPL or the LGPL. If you do not delete
* the provisions above, a recipient may use your version of this file under
* the terms of any one of the MPL, the GPL or the LGPL.
*
* ***** END LICENSE BLOCK ***** */
/* This parsing code originally lived in xpfe/components/directory/ - bbaetz */
#include "prprf.h"
#include "nsDirIndexParser.h"
#include "nsReadableUtils.h"
#include "nsDirIndex.h"
#include "nsEscape.h"
#include "nsIServiceManager.h"
#include "nsIInputStream.h"
#include "nsIChannel.h"
#include "nsIURI.h"
#include "nsCRT.h"
#include "nsIPrefService.h"
#include "nsIPrefBranch.h"
#include "nsIPrefLocalizedString.h"
NS_IMPL_THREADSAFE_ISUPPORTS3(nsDirIndexParser,
nsIRequestObserver,
nsIStreamListener,
nsIDirIndexParser)
nsDirIndexParser::nsDirIndexParser() {
}
nsresult
nsDirIndexParser::Init() {
mLineStart = 0;
mHasDescription = PR_FALSE;
mFormat = nsnull;
// get default charset to be used for directory listings (fallback to
// ISO-8859-1 if pref is unavailable).
NS_NAMED_LITERAL_CSTRING(kFallbackEncoding, "ISO-8859-1");
nsXPIDLString defCharset;
nsCOMPtr<nsIPrefBranch> prefs(do_GetService(NS_PREFSERVICE_CONTRACTID));
if (prefs) {
nsCOMPtr<nsIPrefLocalizedString> prefVal;
prefs->GetComplexValue("intl.charset.default",
NS_GET_IID(nsIPrefLocalizedString),
getter_AddRefs(prefVal));
if (prefVal)
prefVal->ToString(getter_Copies(defCharset));
}
if (!defCharset.IsEmpty())
LossyCopyUTF16toASCII(defCharset, mEncoding); // charset labels are always ASCII
else
mEncoding.Assign(kFallbackEncoding);
nsresult rv;
// XXX not threadsafe
if (gRefCntParser++ == 0)
rv = CallGetService(NS_ITEXTTOSUBURI_CONTRACTID, &gTextToSubURI);
else
rv = NS_OK;
return rv;
}
nsDirIndexParser::~nsDirIndexParser() {
delete[] mFormat;
// XXX not threadsafe
if (--gRefCntParser == 0) {
NS_IF_RELEASE(gTextToSubURI);
}
}
NS_IMETHODIMP
nsDirIndexParser::SetListener(nsIDirIndexListener* aListener) {
mListener = aListener;
return NS_OK;
}
NS_IMETHODIMP
nsDirIndexParser::GetListener(nsIDirIndexListener** aListener) {
NS_IF_ADDREF(*aListener = mListener.get());
return NS_OK;
}
NS_IMETHODIMP
nsDirIndexParser::GetComment(char** aComment) {
*aComment = ToNewCString(mComment);
if (!*aComment)
return NS_ERROR_OUT_OF_MEMORY;
return NS_OK;
}
NS_IMETHODIMP
nsDirIndexParser::SetEncoding(const char* aEncoding) {
mEncoding.Assign(aEncoding);
return NS_OK;
}
NS_IMETHODIMP
nsDirIndexParser::GetEncoding(char** aEncoding) {
*aEncoding = ToNewCString(mEncoding);
if (!*aEncoding)
return NS_ERROR_OUT_OF_MEMORY;
return NS_OK;
}
NS_IMETHODIMP
nsDirIndexParser::OnStartRequest(nsIRequest* aRequest, nsISupports* aCtxt) {
return NS_OK;
}
NS_IMETHODIMP
nsDirIndexParser::OnStopRequest(nsIRequest *aRequest, nsISupports *aCtxt,
nsresult aStatusCode) {
// Finish up
if (mBuf.Length() > (PRUint32) mLineStart) {
ProcessData(aRequest, aCtxt);
}
return NS_OK;
}
nsDirIndexParser::Field
nsDirIndexParser::gFieldTable[] = {
{ "Filename", FIELD_FILENAME },
{ "Description", FIELD_DESCRIPTION },
{ "Content-Length", FIELD_CONTENTLENGTH },
{ "Last-Modified", FIELD_LASTMODIFIED },
{ "Content-Type", FIELD_CONTENTTYPE },
{ "File-Type", FIELD_FILETYPE },
{ nsnull, FIELD_UNKNOWN }
};
nsrefcnt nsDirIndexParser::gRefCntParser = 0;
nsITextToSubURI *nsDirIndexParser::gTextToSubURI;
nsresult
nsDirIndexParser::ParseFormat(const char* aFormatStr) {
// Parse a "200" format line, and remember the fields and their
// ordering in mFormat. Multiple 200 lines stomp on each other.
delete[] mFormat;
// Lets find out how many elements we have.
// easier to do this then realloc
const char* pos = aFormatStr;
int num = 0;
do {
while (*pos && nsCRT::IsAsciiSpace(PRUnichar(*pos)))
++pos;
++num;
if (! *pos)
break;
while (*pos && !nsCRT::IsAsciiSpace(PRUnichar(*pos)))
++pos;
} while (*pos);
mFormat = new int[num+1];
mFormat[num] = -1;
int formatNum=0;
do {
while (*aFormatStr && nsCRT::IsAsciiSpace(PRUnichar(*aFormatStr)))
++aFormatStr;
if (! *aFormatStr)
break;
nsCAutoString name;
PRInt32 len = 0;
while (aFormatStr[len] && !nsCRT::IsAsciiSpace(PRUnichar(aFormatStr[len])))
++len;
name.SetCapacity(len + 1);
name.Append(aFormatStr, len);
aFormatStr += len;
// Okay, we're gonna monkey with the nsStr. Bold!
name.SetLength(nsUnescapeCount(name.BeginWriting()));
// All tokens are case-insensitive - http://www.mozilla.org/projects/netlib/dirindexformat.html
if (name.LowerCaseEqualsLiteral("description"))
mHasDescription = PR_TRUE;
for (Field* i = gFieldTable; i->mName; ++i) {
if (name.EqualsIgnoreCase(i->mName)) {
mFormat[formatNum] = i->mType;
++formatNum;
break;
}
}
} while (*aFormatStr);
return NS_OK;
}
nsresult
nsDirIndexParser::ParseData(nsIDirIndex *aIdx, char* aDataStr) {
// Parse a "201" data line, using the field ordering specified in
// mFormat.
if (!mFormat) {
// Ignore if we haven't seen a format yet.
return NS_OK;
}
nsresult rv = NS_OK;
nsCAutoString filename;
for (PRInt32 i = 0; mFormat[i] != -1; ++i) {
// If we've exhausted the data before we run out of fields, just
// bail.
if (! *aDataStr)
break;
while (*aDataStr && nsCRT::IsAsciiSpace(*aDataStr))
++aDataStr;
char *value = aDataStr;
if (*aDataStr == '"' || *aDataStr == '\'') {
// it's a quoted string. snarf everything up to the next quote character
const char quotechar = *(aDataStr++);
++value;
while (*aDataStr && *aDataStr != quotechar)
++aDataStr;
*aDataStr++ = '\0';
if (! aDataStr) {
NS_WARNING("quoted value not terminated");
}
} else {
// it's unquoted. snarf until we see whitespace.
value = aDataStr;
while (*aDataStr && (!nsCRT::IsAsciiSpace(*aDataStr)))
++aDataStr;
*aDataStr++ = '\0';
}
fieldType t = fieldType(mFormat[i]);
switch (t) {
case FIELD_FILENAME: {
// don't unescape at this point, so that UnEscapeAndConvert() can
filename = value;
PRBool success = PR_FALSE;
nsAutoString entryuri;
if (gTextToSubURI) {
PRUnichar *result = nsnull;
if (NS_SUCCEEDED(rv = gTextToSubURI->UnEscapeAndConvert(mEncoding.get(), filename.get(),
&result)) && (result)) {
if (*result) {
aIdx->SetLocation(filename.get());
if (!mHasDescription)
aIdx->SetDescription(result);
success = PR_TRUE;
}
NS_Free(result);
} else {
NS_WARNING("UnEscapeAndConvert error");
}
}
if (success == PR_FALSE) {
// if unsuccessfully at charset conversion, then
// just fallback to unescape'ing in-place
// XXX - this shouldn't be using UTF8, should it?
// when can we fail to get the service, anyway? - bbaetz
aIdx->SetLocation(filename.get());
if (!mHasDescription) {
aIdx->SetDescription(NS_ConvertUTF8toUTF16(value).get());
}
}
}
break;
case FIELD_DESCRIPTION:
nsUnescape(value);
aIdx->SetDescription(NS_ConvertUTF8toUTF16(value).get());
break;
case FIELD_CONTENTLENGTH:
{
PRInt64 len;
PRInt32 status = PR_sscanf(value, "%lld", &len);
if (status == 1)
aIdx->SetSize(len);
else
aIdx->SetSize(LL_MAXUINT); // LL_MAXUINT means unknown
}
break;
case FIELD_LASTMODIFIED:
{
PRTime tm;
nsUnescape(value);
if (PR_ParseTimeString(value, PR_FALSE, &tm) == PR_SUCCESS) {
aIdx->SetLastModified(tm);
}
}
break;
case FIELD_CONTENTTYPE:
aIdx->SetContentType(value);
break;
case FIELD_FILETYPE:
// unescape in-place
nsUnescape(value);
if (!nsCRT::strcasecmp(value, "directory")) {
aIdx->SetType(nsIDirIndex::TYPE_DIRECTORY);
} else if (!nsCRT::strcasecmp(value, "file")) {
aIdx->SetType(nsIDirIndex::TYPE_FILE);
} else if (!nsCRT::strcasecmp(value, "symbolic-link")) {
aIdx->SetType(nsIDirIndex::TYPE_SYMLINK);
} else {
aIdx->SetType(nsIDirIndex::TYPE_UNKNOWN);
}
break;
case FIELD_UNKNOWN:
// ignore
break;
}
}
return NS_OK;
}
NS_IMETHODIMP
nsDirIndexParser::OnDataAvailable(nsIRequest *aRequest, nsISupports *aCtxt,
nsIInputStream *aStream,
PRUint32 aSourceOffset,
PRUint32 aCount) {
if (aCount < 1)
return NS_OK;
PRInt32 len = mBuf.Length();
// Ensure that our mBuf has capacity to hold the data we're about to
// read.
if (!EnsureStringLength(mBuf, len + aCount))
return NS_ERROR_OUT_OF_MEMORY;
// Now read the data into our buffer.
nsresult rv;
PRUint32 count;
rv = aStream->Read(mBuf.BeginWriting() + len, aCount, &count);
if (NS_FAILED(rv)) return rv;
// Set the string's length according to the amount of data we've read.
// Note: we know this to work on nsCString. This isn't guaranteed to
// work on other strings.
mBuf.SetLength(len + count);
return ProcessData(aRequest, aCtxt);
}
nsresult
nsDirIndexParser::ProcessData(nsIRequest *aRequest, nsISupports *aCtxt) {
if (!mListener)
return NS_ERROR_FAILURE;
PRInt32 numItems = 0;
while(PR_TRUE) {
++numItems;
PRInt32 eol = mBuf.FindCharInSet("\n\r", mLineStart);
if (eol < 0) break;
mBuf.SetCharAt(PRUnichar('\0'), eol);
const char *line = mBuf.get() + mLineStart;
PRInt32 lineLen = eol - mLineStart;
mLineStart = eol + 1;
if (lineLen >= 4) {
nsresult rv;
const char *buf = line;
if (buf[0] == '1') {
if (buf[1] == '0') {
if (buf[2] == '0' && buf[3] == ':') {
// 100. Human-readable comment line. Ignore
} else if (buf[2] == '1' && buf[3] == ':') {
// 101. Human-readable information line.
mComment.Append(buf + 4);
char *value = ((char *)buf) + 4;
nsUnescape(value);
mListener->OnInformationAvailable(aRequest, aCtxt, NS_ConvertUTF8toUTF16(value));
} else if (buf[2] == '2' && buf[3] == ':') {
// 102. Human-readable information line, HTML.
mComment.Append(buf + 4);
}
}
} else if (buf[0] == '2') {
if (buf[1] == '0') {
if (buf[2] == '0' && buf[3] == ':') {
// 200. Define field names
rv = ParseFormat(buf + 4);
if (NS_FAILED(rv)) {
return rv;
}
} else if (buf[2] == '1' && buf[3] == ':') {
// 201. Field data
nsCOMPtr<nsIDirIndex> idx = do_CreateInstance("@mozilla.org/dirIndex;1",&rv);
if (NS_FAILED(rv))
return rv;
rv = ParseData(idx, ((char *)buf) + 4);
if (NS_FAILED(rv)) {
return rv;
}
mListener->OnIndexAvailable(aRequest, aCtxt, idx);
}
}
} else if (buf[0] == '3') {
if (buf[1] == '0') {
if (buf[2] == '0' && buf[3] == ':') {
// 300. Self-referring URL
} else if (buf[2] == '1' && buf[3] == ':') {
// 301. OUR EXTENSION - encoding
int i = 4;
while (buf[i] && nsCRT::IsAsciiSpace(buf[i]))
++i;
if (buf[i])
SetEncoding(buf+i);
}
}
}
}
}
return NS_OK;
}
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