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tenfourfox/netwerk/base/nsDirectoryIndexStream.cpp

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/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/* vim:set sw=4 sts=4 et cin: */
/* 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/. */
/*
The converts a filesystem directory into an "HTTP index" stream per
Lou Montulli's original spec:
http://www.mozilla.org/projects/netlib/dirindexformat.html
*/
#include "nsEscape.h"
#include "nsDirectoryIndexStream.h"
#include "mozilla/Logging.h"
#include "prtime.h"
#include "nsISimpleEnumerator.h"
#ifdef THREADSAFE_I18N
#include "nsCollationCID.h"
#include "nsICollation.h"
#include "nsILocale.h"
#include "nsILocaleService.h"
#endif
#include "nsIFile.h"
#include "nsURLHelper.h"
#include "nsNativeCharsetUtils.h"
// NOTE: This runs on the _file transport_ thread.
// The problem is that now that we're actually doing something with the data,
// we want to do stuff like i18n sorting. However, none of the collation stuff
// is threadsafe.
// So THIS CODE IS ASCII ONLY!!!!!!!! This is no worse than the current
// behaviour, though. See bug 99382.
// When this is fixed, #define THREADSAFE_I18N to get this code working
//#define THREADSAFE_I18N
static mozilla::LazyLogModule gLog("nsDirectoryIndexStream");
nsDirectoryIndexStream::nsDirectoryIndexStream()
: mOffset(0), mStatus(NS_OK), mPos(0)
{
MOZ_LOG(gLog, LogLevel::Debug,
("nsDirectoryIndexStream[%p]: created", this));
}
static int compare(nsIFile* aElement1, nsIFile* aElement2, void* aData)
{
if (!NS_IsNativeUTF8()) {
// don't check for errors, because we can't report them anyway
nsAutoString name1, name2;
aElement1->GetLeafName(name1);
aElement2->GetLeafName(name2);
// Note - we should do the collation to do sorting. Why don't we?
// Because that is _slow_. Using TestProtocols to list file:///dev/
// goes from 3 seconds to 22. (This may be why nsXULSortService is
// so slow as well).
// Does this have bad effects? Probably, but since nsXULTree appears
// to use the raw RDF literal value as the sort key (which ammounts to an
// strcmp), it won't be any worse, I think.
// This could be made faster, by creating the keys once,
// but CompareString could still be smarter - see bug 99383 - bbaetz
// NB - 99393 has been WONTFIXed. So if the I18N code is ever made
// threadsafe so that this matters, we'd have to pass through a
// struct { nsIFile*, uint8_t* } with the pre-calculated key.
return Compare(name1, name2);
}
nsAutoCString name1, name2;
aElement1->GetNativeLeafName(name1);
aElement2->GetNativeLeafName(name2);
return Compare(name1, name2);
}
nsresult
nsDirectoryIndexStream::Init(nsIFile* aDir)
{
nsresult rv;
bool isDir;
rv = aDir->IsDirectory(&isDir);
if (NS_FAILED(rv)) return rv;
NS_PRECONDITION(isDir, "not a directory");
if (!isDir)
return NS_ERROR_ILLEGAL_VALUE;
if (MOZ_LOG_TEST(gLog, LogLevel::Debug)) {
nsAutoCString path;
aDir->GetNativePath(path);
MOZ_LOG(gLog, LogLevel::Debug,
("nsDirectoryIndexStream[%p]: initialized on %s",
this, path.get()));
}
// Sigh. We have to allocate on the heap because there are no
// assignment operators defined.
nsCOMPtr<nsISimpleEnumerator> iter;
rv = aDir->GetDirectoryEntries(getter_AddRefs(iter));
if (NS_FAILED(rv)) return rv;
// Now lets sort, because clients expect it that way
// XXX - should we do so here, or when the first item is requested?
// XXX - use insertion sort instead?
bool more;
nsCOMPtr<nsISupports> elem;
while (NS_SUCCEEDED(iter->HasMoreElements(&more)) && more) {
rv = iter->GetNext(getter_AddRefs(elem));
if (NS_SUCCEEDED(rv)) {
nsCOMPtr<nsIFile> file = do_QueryInterface(elem);
if (file)
mArray.AppendObject(file); // addrefs
}
}
#ifdef THREADSAFE_I18N
nsCOMPtr<nsILocaleService> ls = do_GetService(NS_LOCALESERVICE_CONTRACTID,
&rv);
if (NS_FAILED(rv)) return rv;
nsCOMPtr<nsILocale> locale;
rv = ls->GetApplicationLocale(getter_AddRefs(locale));
if (NS_FAILED(rv)) return rv;
nsCOMPtr<nsICollationFactory> cf = do_CreateInstance(NS_COLLATIONFACTORY_CONTRACTID,
&rv);
if (NS_FAILED(rv)) return rv;
nsCOMPtr<nsICollation> coll;
rv = cf->CreateCollation(locale, getter_AddRefs(coll));
if (NS_FAILED(rv)) return rv;
mArray.Sort(compare, coll);
#else
mArray.Sort(compare, nullptr);
#endif
mBuf.AppendLiteral("300: ");
nsAutoCString url;
rv = net_GetURLSpecFromFile(aDir, url);
if (NS_FAILED(rv)) return rv;
mBuf.Append(url);
mBuf.Append('\n');
mBuf.AppendLiteral("200: filename content-length last-modified file-type\n");
return NS_OK;
}
nsDirectoryIndexStream::~nsDirectoryIndexStream()
{
MOZ_LOG(gLog, LogLevel::Debug,
("nsDirectoryIndexStream[%p]: destroyed", this));
}
nsresult
nsDirectoryIndexStream::Create(nsIFile* aDir, nsIInputStream** aResult)
{
RefPtr<nsDirectoryIndexStream> result = new nsDirectoryIndexStream();
if (! result)
return NS_ERROR_OUT_OF_MEMORY;
nsresult rv = result->Init(aDir);
if (NS_FAILED(rv)) {
return rv;
}
result.forget(aResult);
return NS_OK;
}
NS_IMPL_ISUPPORTS(nsDirectoryIndexStream, nsIInputStream)
// The below routines are proxied to the UI thread!
NS_IMETHODIMP
nsDirectoryIndexStream::Close()
{
mStatus = NS_BASE_STREAM_CLOSED;
return NS_OK;
}
NS_IMETHODIMP
nsDirectoryIndexStream::Available(uint64_t* aLength)
{
if (NS_FAILED(mStatus))
return mStatus;
// If there's data in our buffer, use that
if (mOffset < (int32_t)mBuf.Length()) {
*aLength = mBuf.Length() - mOffset;
return NS_OK;
}
// Returning one byte is not ideal, but good enough
*aLength = (mPos < mArray.Count()) ? 1 : 0;
return NS_OK;
}
NS_IMETHODIMP
nsDirectoryIndexStream::Read(char* aBuf, uint32_t aCount, uint32_t* aReadCount)
{
if (mStatus == NS_BASE_STREAM_CLOSED) {
*aReadCount = 0;
return NS_OK;
}
if (NS_FAILED(mStatus))
return mStatus;
uint32_t nread = 0;
// If anything is enqueued (or left-over) in mBuf, then feed it to
// the reader first.
while (mOffset < (int32_t)mBuf.Length() && aCount != 0) {
*(aBuf++) = char(mBuf.CharAt(mOffset++));
--aCount;
++nread;
}
// Room left?
if (aCount > 0) {
mOffset = 0;
mBuf.Truncate();
// Okay, now we'll suck stuff off of our iterator into the mBuf...
while (uint32_t(mBuf.Length()) < aCount) {
bool more = mPos < mArray.Count();
if (!more) break;
// don't addref, for speed - an addref happened when it
// was placed in the array, so it's not going to go stale
nsIFile* current = mArray.ObjectAt(mPos);
++mPos;
if (MOZ_LOG_TEST(gLog, LogLevel::Debug)) {
nsAutoCString path;
current->GetNativePath(path);
MOZ_LOG(gLog, LogLevel::Debug,
("nsDirectoryIndexStream[%p]: iterated %s",
this, path.get()));
}
// rjc: don't return hidden files/directories!
// bbaetz: why not?
nsresult rv;
#ifndef XP_UNIX
bool hidden = false;
current->IsHidden(&hidden);
if (hidden) {
MOZ_LOG(gLog, LogLevel::Debug,
("nsDirectoryIndexStream[%p]: skipping hidden file/directory",
this));
continue;
}
#endif
int64_t fileSize = 0;
current->GetFileSize( &fileSize );
PRTime fileInfoModifyTime = 0;
current->GetLastModifiedTime( &fileInfoModifyTime );
fileInfoModifyTime *= PR_USEC_PER_MSEC;
mBuf.AppendLiteral("201: ");
// The "filename" field
char* escaped = nullptr;
if (!NS_IsNativeUTF8()) {
nsAutoString leafname;
rv = current->GetLeafName(leafname);
if (NS_FAILED(rv)) return rv;
if (!leafname.IsEmpty())
escaped = nsEscape(NS_ConvertUTF16toUTF8(leafname).get(), url_Path);
} else {
nsAutoCString leafname;
rv = current->GetNativeLeafName(leafname);
if (NS_FAILED(rv)) return rv;
if (!leafname.IsEmpty())
escaped = nsEscape(leafname.get(), url_Path);
}
if (escaped) {
mBuf += escaped;
mBuf.Append(' ');
free(escaped);
}
// The "content-length" field
mBuf.AppendInt(fileSize, 10);
mBuf.Append(' ');
// The "last-modified" field
PRExplodedTime tm;
PR_ExplodeTime(fileInfoModifyTime, PR_GMTParameters, &tm);
{
char buf[64];
PR_FormatTimeUSEnglish(buf, sizeof(buf), "%a,%%20%d%%20%b%%20%Y%%20%H:%M:%S%%20GMT ", &tm);
mBuf.Append(buf);
}
// The "file-type" field
bool isFile = true;
current->IsFile(&isFile);
if (isFile) {
mBuf.AppendLiteral("FILE ");
}
else {
bool isDir;
rv = current->IsDirectory(&isDir);
if (NS_FAILED(rv)) return rv;
if (isDir) {
mBuf.AppendLiteral("DIRECTORY ");
}
else {
bool isLink;
rv = current->IsSymlink(&isLink);
if (NS_FAILED(rv)) return rv;
if (isLink) {
mBuf.AppendLiteral("SYMBOLIC-LINK ");
}
}
}
mBuf.Append('\n');
}
// ...and once we've either run out of directory entries, or
// filled up the buffer, then we'll push it to the reader.
while (mOffset < (int32_t)mBuf.Length() && aCount != 0) {
*(aBuf++) = char(mBuf.CharAt(mOffset++));
--aCount;
++nread;
}
}
*aReadCount = nread;
return NS_OK;
}
NS_IMETHODIMP
nsDirectoryIndexStream::ReadSegments(nsWriteSegmentFun writer, void * closure, uint32_t count, uint32_t *_retval)
{
return NS_ERROR_NOT_IMPLEMENTED;
}
NS_IMETHODIMP
nsDirectoryIndexStream::IsNonBlocking(bool *aNonBlocking)
{
*aNonBlocking = false;
return NS_OK;
}
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