pjs/netwerk/streamconv/converters/nsFTPDirListingConv.cpp

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C++

/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/* ***** 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 mozilla.org code.
*
* The Initial Developer of the Original Code is
* Netscape Communications Corporation.
* Portions created by the Initial Developer are Copyright (C) 1998
* the Initial Developer. All Rights Reserved.
*
* Contributor(s):
* Bradley Baetz <bbaetz@student.usyd.edu.au>
*
* 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 ***** */
#include "nsFTPDirListingConv.h"
#include "nsMemory.h"
#include "plstr.h"
#include "prlog.h"
#include "nsIServiceManager.h"
#include "nsXPIDLString.h"
#include "nsReadableUtils.h"
#include "nsCOMPtr.h"
#include "nsEscape.h"
#include "nsNetUtil.h"
#include "nsStringStream.h"
#include "nsIComponentManager.h"
#include "nsDateTimeFormatCID.h"
#include "nsIStreamListener.h"
#include "nsCRT.h"
#include "nsMimeTypes.h"
#include "nsAutoPtr.h"
#include "ParseFTPList.h"
#if defined(PR_LOGGING)
//
// Log module for FTP dir listing stream converter logging...
//
// To enable logging (see prlog.h for full details):
//
// set NSPR_LOG_MODULES=nsFTPDirListConv:5
// set NSPR_LOG_FILE=nspr.log
//
// this enables PR_LOG_DEBUG level information and places all output in
// the file nspr.log
//
PRLogModuleInfo* gFTPDirListConvLog = nsnull;
#endif /* PR_LOGGING */
// nsISupports implementation
NS_IMPL_ISUPPORTS3(nsFTPDirListingConv,
nsIStreamConverter,
nsIStreamListener,
nsIRequestObserver)
// nsIStreamConverter implementation
NS_IMETHODIMP
nsFTPDirListingConv::Convert(nsIInputStream *aFromStream,
const char *aFromType,
const char *aToType,
nsISupports *aCtxt, nsIInputStream **_retval) {
return NS_ERROR_NOT_IMPLEMENTED;
}
// Stream converter service calls this to initialize the actual stream converter (us).
NS_IMETHODIMP
nsFTPDirListingConv::AsyncConvertData(const char *aFromType, const char *aToType,
nsIStreamListener *aListener, nsISupports *aCtxt) {
NS_ASSERTION(aListener && aFromType && aToType, "null pointer passed into FTP dir listing converter");
// hook up our final listener. this guy gets the various On*() calls we want to throw
// at him.
mFinalListener = aListener;
NS_ADDREF(mFinalListener);
PR_LOG(gFTPDirListConvLog, PR_LOG_DEBUG,
("nsFTPDirListingConv::AsyncConvertData() converting FROM raw, TO application/http-index-format\n"));
return NS_OK;
}
// nsIStreamListener implementation
NS_IMETHODIMP
nsFTPDirListingConv::OnDataAvailable(nsIRequest* request, nsISupports *ctxt,
nsIInputStream *inStr, PRUint32 sourceOffset, PRUint32 count) {
NS_ASSERTION(request, "FTP dir listing stream converter needs a request");
nsresult rv;
nsCOMPtr<nsIChannel> channel = do_QueryInterface(request, &rv);
NS_ENSURE_SUCCESS(rv, rv);
PRUint32 read, streamLen;
rv = inStr->Available(&streamLen);
NS_ENSURE_SUCCESS(rv, rv);
nsAutoArrayPtr<char> buffer(new char[streamLen + 1]);
NS_ENSURE_TRUE(buffer, NS_ERROR_OUT_OF_MEMORY);
rv = inStr->Read(buffer, streamLen, &read);
NS_ENSURE_SUCCESS(rv, rv);
// the dir listings are ascii text, null terminate this sucker.
buffer[streamLen] = '\0';
PR_LOG(gFTPDirListConvLog, PR_LOG_DEBUG, ("nsFTPDirListingConv::OnData(request = %x, ctxt = %x, inStr = %x, sourceOffset = %d, count = %d)\n", request, ctxt, inStr, sourceOffset, count));
if (!mBuffer.IsEmpty()) {
// we have data left over from a previous OnDataAvailable() call.
// combine the buffers so we don't lose any data.
mBuffer.Append(buffer);
buffer = new char[mBuffer.Length()+1];
NS_ENSURE_TRUE(buffer, NS_ERROR_OUT_OF_MEMORY);
strncpy(buffer, mBuffer.get(), mBuffer.Length()+1);
mBuffer.Truncate();
}
#ifndef DEBUG_dougt
PR_LOG(gFTPDirListConvLog, PR_LOG_DEBUG, ("::OnData() received the following %d bytes...\n\n%s\n\n", streamLen, buffer.get()) );
#else
printf("::OnData() received the following %d bytes...\n\n%s\n\n", streamLen, buffer);
#endif // DEBUG_dougt
nsCAutoString indexFormat;
if (!mSentHeading) {
// build up the 300: line
nsCOMPtr<nsIURI> uri;
rv = channel->GetURI(getter_AddRefs(uri));
NS_ENSURE_SUCCESS(rv, rv);
rv = GetHeaders(indexFormat, uri);
NS_ENSURE_SUCCESS(rv, rv);
mSentHeading = PR_TRUE;
}
char *line = buffer;
line = DigestBufferLines(line, indexFormat);
#ifndef DEBUG_dougt
PR_LOG(gFTPDirListConvLog, PR_LOG_DEBUG, ("::OnData() sending the following %d bytes...\n\n%s\n\n",
indexFormat.Length(), indexFormat.get()) );
#else
char *unescData = ToNewCString(indexFormat);
NS_ENSURE_TRUE(unescData, NS_ERROR_OUT_OF_MEMORY);
nsUnescape(unescData);
printf("::OnData() sending the following %d bytes...\n\n%s\n\n", indexFormat.Length(), unescData);
nsMemory::Free(unescData);
#endif // DEBUG_dougt
// if there's any data left over, buffer it.
if (line && *line) {
mBuffer.Append(line);
PR_LOG(gFTPDirListConvLog, PR_LOG_DEBUG, ("::OnData() buffering the following %d bytes...\n\n%s\n\n",
PL_strlen(line), line) );
}
// send the converted data out.
nsCOMPtr<nsIInputStream> inputData;
rv = NS_NewCStringInputStream(getter_AddRefs(inputData), indexFormat);
NS_ENSURE_SUCCESS(rv, rv);
rv = mFinalListener->OnDataAvailable(request, ctxt, inputData, 0, indexFormat.Length());
return rv;
}
// nsIRequestObserver implementation
NS_IMETHODIMP
nsFTPDirListingConv::OnStartRequest(nsIRequest* request, nsISupports *ctxt) {
// we don't care about start. move along... but start masqeurading
// as the http-index channel now.
return mFinalListener->OnStartRequest(request, ctxt);
}
NS_IMETHODIMP
nsFTPDirListingConv::OnStopRequest(nsIRequest* request, nsISupports *ctxt,
nsresult aStatus) {
// we don't care about stop. move along...
return mFinalListener->OnStopRequest(request, ctxt, aStatus);
}
// nsFTPDirListingConv methods
nsFTPDirListingConv::nsFTPDirListingConv() {
mFinalListener = nsnull;
mSentHeading = PR_FALSE;
}
nsFTPDirListingConv::~nsFTPDirListingConv() {
NS_IF_RELEASE(mFinalListener);
}
nsresult
nsFTPDirListingConv::Init() {
#if defined(PR_LOGGING)
//
// Initialize the global PRLogModule for FTP Protocol logging
// if necessary...
//
if (nsnull == gFTPDirListConvLog) {
gFTPDirListConvLog = PR_NewLogModule("nsFTPDirListingConv");
}
#endif /* PR_LOGGING */
return NS_OK;
}
nsresult
nsFTPDirListingConv::GetHeaders(nsACString& headers,
nsIURI* uri)
{
nsresult rv = NS_OK;
// build up 300 line
headers.AppendLiteral("300: ");
// Bug 111117 - don't print the password
nsCAutoString pw;
nsCAutoString spec;
uri->GetPassword(pw);
if (!pw.IsEmpty()) {
rv = uri->SetPassword(EmptyCString());
if (NS_FAILED(rv)) return rv;
rv = uri->GetAsciiSpec(spec);
if (NS_FAILED(rv)) return rv;
headers.Append(spec);
rv = uri->SetPassword(pw);
if (NS_FAILED(rv)) return rv;
} else {
rv = uri->GetAsciiSpec(spec);
if (NS_FAILED(rv)) return rv;
headers.Append(spec);
}
headers.Append(char(nsCRT::LF));
// END 300:
// build up the column heading; 200:
headers.AppendLiteral("200: filename content-length last-modified file-type\n");
// END 200:
return rv;
}
char *
nsFTPDirListingConv::DigestBufferLines(char *aBuffer, nsCString &aString) {
char *line = aBuffer;
char *eol;
PRBool cr = PR_FALSE;
list_state state;
state.magic = 0;
// while we have new lines, parse 'em into application/http-index-format.
while ( line && (eol = PL_strchr(line, nsCRT::LF)) ) {
// yank any carriage returns too.
if (eol > line && *(eol-1) == nsCRT::CR) {
eol--;
*eol = '\0';
cr = PR_TRUE;
} else {
*eol = '\0';
cr = PR_FALSE;
}
list_result result;
int type = ParseFTPList(line, &state, &result );
// if it is other than a directory, file, or link -OR- if it is a
// directory named . or .., skip over this line.
if ((type != 'd' && type != 'f' && type != 'l') ||
(result.fe_type == 'd' && result.fe_fname[0] == '.' &&
(result.fe_fnlen == 1 || (result.fe_fnlen == 2 && result.fe_fname[1] == '.'))) )
{
if (cr)
line = eol+2;
else
line = eol+1;
continue;
}
// blast the index entry into the indexFormat buffer as a 201: line.
aString.AppendLiteral("201: ");
// FILENAME
// parsers for styles 'U' and 'W' handle sequence " -> " themself
if (state.lstyle != 'U' && state.lstyle != 'W') {
const char* offset = strstr(result.fe_fname, " -> ");
if (offset) {
result.fe_fnlen = offset - result.fe_fname;
}
}
nsCAutoString buf;
aString.Append('\"');
aString.Append(NS_EscapeURL(Substring(result.fe_fname,
result.fe_fname+result.fe_fnlen),
esc_Minimal|esc_OnlyASCII|esc_Forced,buf));
aString.AppendLiteral("\" ");
// CONTENT LENGTH
if (type != 'd')
{
for (int i = 0; i < int(sizeof(result.fe_size)); ++i)
{
if (result.fe_size[i] != '\0')
aString.Append((const char*)&result.fe_size[i], 1);
}
aString.Append(' ');
}
else
aString.AppendLiteral("0 ");
// MODIFIED DATE
char buffer[256] = "";
// Note: The below is the RFC822/1123 format, as required by
// the application/http-index-format specs
// viewers of such a format can then reformat this into the
// current locale (or anything else they choose)
PR_FormatTimeUSEnglish(buffer, sizeof(buffer),
"%a, %d %b %Y %H:%M:%S", &result.fe_time );
char *escapedDate = nsEscape(buffer, url_Path);
aString.Append(escapedDate);
nsMemory::Free(escapedDate);
aString.Append(' ');
// ENTRY TYPE
if (type == 'd')
aString.AppendLiteral("DIRECTORY");
else if (type == 'l')
aString.AppendLiteral("SYMBOLIC-LINK");
else
aString.AppendLiteral("FILE");
aString.Append(' ');
aString.Append(char(nsCRT::LF)); // complete this line
// END 201:
if (cr)
line = eol+2;
else
line = eol+1;
} // end while(eol)
return line;
}
nsresult
NS_NewFTPDirListingConv(nsFTPDirListingConv** aFTPDirListingConv)
{
NS_PRECONDITION(aFTPDirListingConv != nsnull, "null ptr");
if (! aFTPDirListingConv)
return NS_ERROR_NULL_POINTER;
*aFTPDirListingConv = new nsFTPDirListingConv();
if (! *aFTPDirListingConv)
return NS_ERROR_OUT_OF_MEMORY;
NS_ADDREF(*aFTPDirListingConv);
return (*aFTPDirListingConv)->Init();
}