C++ EmptyCString函数代码示例

NS_IMETHODIMP nsSmtpService::NewChannel2(nsIURI *aURI,
                                         nsILoadInfo* aLoadInfo,
                                         nsIChannel **_retval)
{
  NS_ENSURE_ARG_POINTER(aURI);
  // create an empty pipe for use with the input stream channel.
  nsCOMPtr<nsIAsyncInputStream> pipeIn;
  nsCOMPtr<nsIAsyncOutputStream> pipeOut;
  nsCOMPtr<nsIPipe> pipe = do_CreateInstance("@mozilla.org/pipe;1");
  nsresult rv = pipe->Init(false, false, 0, 0);
  if (NS_FAILED(rv)) 
    return rv;
  
  pipe->GetInputStream(getter_AddRefs(pipeIn));
  pipe->GetOutputStream(getter_AddRefs(pipeOut));

  pipeOut->Close();

  if (aLoadInfo) {
    return NS_NewInputStreamChannelInternal(_retval,
                                            aURI,
                                            pipeIn,
                                            NS_LITERAL_CSTRING("application/x-mailto"),
                                            EmptyCString(),
                                            aLoadInfo);
  }

  nsCOMPtr<nsIPrincipal> nullPrincipal =
    do_CreateInstance("@mozilla.org/nullprincipal;1", &rv);
  NS_ASSERTION(NS_SUCCEEDED(rv), "CreateInstance of nullprincipal failed.");
  if (NS_FAILED(rv))
    return rv;

  return NS_NewInputStreamChannel(_retval, aURI, pipeIn,
                                  nullPrincipal, nsILoadInfo::SEC_NORMAL,
                                  nsIContentPolicy::TYPE_OTHER,
                                  NS_LITERAL_CSTRING("application/x-mailto"));
}

NS_IMETHODIMP nsAbMDBDirectory::GetDatabaseFile(nsIFile **aResult)
{
  NS_ENSURE_ARG_POINTER(aResult);

  nsCString fileName;
  nsresult rv = GetStringValue("filename", EmptyCString(), fileName);
  NS_ENSURE_SUCCESS(rv, rv);

  if (fileName.IsEmpty())
    return NS_ERROR_NOT_INITIALIZED;

  nsCOMPtr<nsIFile> dbFile;
  rv = NS_GetSpecialDirectory(NS_APP_USER_PROFILE_50_DIR,
                              getter_AddRefs(dbFile));
  NS_ENSURE_SUCCESS(rv, rv);

  rv = dbFile->AppendNative(fileName);
  NS_ENSURE_SUCCESS(rv, rv);

  NS_ADDREF(*aResult = dbFile);

  return NS_OK;
}

already_AddRefed<Exception>
CreateException(JSContext* aCx, nsresult aRv, const char* aMessage)
{
  // Do we use DOM exceptions for this error code?
  switch (NS_ERROR_GET_MODULE(aRv)) {
  case NS_ERROR_MODULE_DOM:
  case NS_ERROR_MODULE_SVG:
  case NS_ERROR_MODULE_DOM_XPATH:
  case NS_ERROR_MODULE_DOM_INDEXEDDB:
  case NS_ERROR_MODULE_DOM_FILEHANDLE:
  case NS_ERROR_MODULE_DOM_BLUETOOTH:
    return DOMException::Create(aRv);
  default:
    break;
  }

  // If not, use the default.
  // aMessage can be null, so we can't use nsDependentCString on it.
  nsRefPtr<Exception> exception =
    new Exception(nsCString(aMessage), aRv,
                  EmptyCString(), nullptr, nullptr);
  return exception.forget();
}

void
WebBrowserPersistSerializeParent::ActorDestroy(ActorDestroyReason aWhy)
{
    if (mFinish) {
        MOZ_ASSERT(aWhy != Deletion);
        // See comment in WebBrowserPersistDocumentParent::ActorDestroy
        // (or bug 1202887) for why this is deferred.
        nsCOMPtr<nsIRunnable> errorLater =
          NewRunnableMethod<nsCOMPtr<nsIWebBrowserPersistDocument>,
                            nsCOMPtr<nsIOutputStream>,
                            nsCString,
                            nsresult>(
            "nsIWebBrowserPersistWriteCompletion::OnFinish",
            mFinish,
            &nsIWebBrowserPersistWriteCompletion::OnFinish,
            mDocument,
            mStream,
            EmptyCString(),
            NS_ERROR_FAILURE);
        NS_DispatchToCurrentThread(errorLater);
        mFinish = nullptr;
    }
}

nsresult
sbWatchFolderService::StartWatchingFolder()
{
  // Don't start if the service is not in the |eStarted| state or if the
  // watch path is empty.
  if (mWatchPath.IsEmpty() || mServiceState != eStarted) {
    return NS_OK;
  }

  nsresult rv;
  mFileSystemWatcher =
    do_CreateInstance("@songbirdnest.com/filesystem/watcher;1", &rv);
  NS_ENSURE_SUCCESS(rv, rv);

  if (mFileSystemWatcherGUID.Equals(EmptyCString())) {
    // Init a new file-system watcher. The session GUID for the new watcher
    // will be saved in StopWatching().
    TRACE(("%s: initiating new FS watcher for [%s]",
           __FUNCTION__,
           NS_ConvertUTF16toUTF8(mWatchPath).get()));
    rv = mFileSystemWatcher->Init(this, mWatchPath, PR_TRUE);
    NS_ENSURE_SUCCESS(rv, rv);
  }
  else {
    TRACE(("%s: initiating saved session %s",
           __FUNCTION__, mFileSystemWatcherGUID.get()));
    rv = mFileSystemWatcher->InitWithSession(mFileSystemWatcherGUID, this);
    NS_ENSURE_SUCCESS(rv, rv);
  }

  rv = mFileSystemWatcher->StartWatching();
  NS_ENSURE_SUCCESS(rv, rv);

  // The service is now watching
  mServiceState = eWatching;
  return NS_OK;
}

nsresult nsMsgFolderCache::InitExistingDB()
{
  nsresult err = InitMDBInfo();
  if (NS_FAILED(err))
    return err;

  err = GetStore()->GetTable(GetEnv(), &m_allFoldersTableOID, &m_mdbAllFoldersTable);
  if (NS_SUCCEEDED(err) && m_mdbAllFoldersTable)
  {
    nsIMdbTableRowCursor* rowCursor = nsnull;
    err = m_mdbAllFoldersTable->GetTableRowCursor(GetEnv(), -1, &rowCursor);
    if (NS_SUCCEEDED(err) && rowCursor)
    {
      // iterate over the table rows and create nsMsgFolderCacheElements for each.
      while (PR_TRUE)
      {
        nsresult rv;
        nsIMdbRow* hdrRow;
        mdb_pos rowPos;

        rv = rowCursor->NextRow(GetEnv(), &hdrRow, &rowPos);
        if (NS_FAILED(rv) || !hdrRow)
          break;

        rv = AddCacheElement(EmptyCString(), hdrRow, nsnull);
        hdrRow->Release();
        if (NS_FAILED(rv))
          return rv;
      }
      rowCursor->Release();
    }
  }
  else
    err = NS_ERROR_FAILURE;

  return err;
}

void
nsPACMan::ProcessPendingQ(nsresult status)
{
  // Now, start any pending queries
  PRCList *node = PR_LIST_HEAD(&mPendingQ);
  while (node != &mPendingQ) {
    PendingPACQuery *query = static_cast<PendingPACQuery *>(node);
    node = PR_NEXT_LINK(node);
    if (NS_SUCCEEDED(status)) {
      // keep the query in the list (so we can complete it from Shutdown if
      // necessary).
      status = query->Start(nsIDNSService::RESOLVE_SPECULATE);
    }
    if (status == NS_ERROR_DNS_LOOKUP_QUEUE_FULL) {
      query->OnLookupComplete(NULL, NULL, NS_OK);
      status = NS_OK;
    } else if (NS_FAILED(status)) {
      // remove the query from the list
      PR_REMOVE_LINK(query);
      query->Complete(status, EmptyCString());
      NS_RELEASE(query);
    }
  }
}

nsresult
nsFontFaceLoader::CheckLoadAllowed(nsIPrincipal* aSourcePrincipal,
                                   nsIURI* aTargetURI,
                                   nsISupports* aContext)
{
  nsresult rv;
  
  if (!aSourcePrincipal)
    return NS_OK;

  // check with the security manager
  nsIScriptSecurityManager *secMan = nsContentUtils::GetSecurityManager();
  rv = secMan->CheckLoadURIWithPrincipal(aSourcePrincipal, aTargetURI,
                                        nsIScriptSecurityManager::STANDARD);
  if (NS_FAILED(rv)) {
    return rv;
  }

  // check content policy
  PRInt16 shouldLoad = nsIContentPolicy::ACCEPT;
  rv = NS_CheckContentLoadPolicy(nsIContentPolicy::TYPE_FONT,
                                 aTargetURI,
                                 aSourcePrincipal,
                                 aContext,
                                 EmptyCString(), // mime type
                                 nsnull,
                                 &shouldLoad,
                                 nsContentUtils::GetContentPolicy(),
                                 nsContentUtils::GetSecurityManager());

  if (NS_FAILED(rv) || NS_CP_REJECTED(shouldLoad)) {
    return NS_ERROR_CONTENT_BLOCKED;
  }

  return NS_OK;
}

void
nsHttpConnectionInfo::CloneAsDirectRoute(nsHttpConnectionInfo **outCI)
{
    if (mRoutedHost.IsEmpty()) {
        *outCI = Clone();
        return;
    }

    RefPtr<nsHttpConnectionInfo> clone =
        new nsHttpConnectionInfo(mOrigin, mOriginPort,
                                 EmptyCString(), mUsername, mProxyInfo,
                                 mOriginAttributes, mEndToEndSSL);
    // Make sure the anonymous, insecure-scheme, and private flags are transferred
    clone->SetAnonymous(GetAnonymous());
    clone->SetPrivate(GetPrivate());
    clone->SetInsecureScheme(GetInsecureScheme());
    clone->SetNoSpdy(GetNoSpdy());
    clone->SetBeConservative(GetBeConservative());
    clone->SetTlsFlags(GetTlsFlags());
    if (!mNetworkInterfaceId.IsEmpty()) {
        clone->SetNetworkInterfaceId(mNetworkInterfaceId);
    }
    clone.forget(outCI);
}

nsresult
HttpBaseChannel::SetupReplacementChannel(nsIURI       *newURI, 
                                         nsIChannel   *newChannel,
                                         bool          preserveMethod,
                                         bool          forProxy)
{
  LOG(("HttpBaseChannel::SetupReplacementChannel "
     "[this=%p newChannel=%p preserveMethod=%d forProxy=%d]",
     this, newChannel, preserveMethod, forProxy));
  PRUint32 newLoadFlags = mLoadFlags | LOAD_REPLACE;
  // if the original channel was using SSL and this channel is not using
  // SSL, then no need to inhibit persistent caching.  however, if the
  // original channel was not using SSL and has INHIBIT_PERSISTENT_CACHING
  // set, then allow the flag to apply to the redirected channel as well.
  // since we force set INHIBIT_PERSISTENT_CACHING on all HTTPS channels,
  // we only need to check if the original channel was using SSL.
  if (mConnectionInfo->UsingSSL())
    newLoadFlags &= ~INHIBIT_PERSISTENT_CACHING;

  // Do not pass along LOAD_CHECK_OFFLINE_CACHE
  newLoadFlags &= ~nsICachingChannel::LOAD_CHECK_OFFLINE_CACHE;

  newChannel->SetLoadGroup(mLoadGroup); 
  newChannel->SetNotificationCallbacks(mCallbacks);
  newChannel->SetLoadFlags(newLoadFlags);

  nsCOMPtr<nsIHttpChannel> httpChannel = do_QueryInterface(newChannel);
  if (!httpChannel)
    return NS_OK; // no other options to set

  if (preserveMethod) {
    nsCOMPtr<nsIUploadChannel> uploadChannel =
      do_QueryInterface(httpChannel);
    nsCOMPtr<nsIUploadChannel2> uploadChannel2 =
      do_QueryInterface(httpChannel);
    if (mUploadStream && (uploadChannel2 || uploadChannel)) {
      // rewind upload stream
      nsCOMPtr<nsISeekableStream> seekable = do_QueryInterface(mUploadStream);
      if (seekable)
        seekable->Seek(nsISeekableStream::NS_SEEK_SET, 0);

      // replicate original call to SetUploadStream...
      if (uploadChannel2) {
        const char *ctype = mRequestHead.PeekHeader(nsHttp::Content_Type);
        if (!ctype)
          ctype = "";
        const char *clen  = mRequestHead.PeekHeader(nsHttp::Content_Length);
        PRInt64 len = clen ? nsCRT::atoll(clen) : -1;
        uploadChannel2->ExplicitSetUploadStream(
                                  mUploadStream, nsDependentCString(ctype), len,
                                  nsDependentCString(mRequestHead.Method()),
                                  mUploadStreamHasHeaders);
      } else {
        if (mUploadStreamHasHeaders) {
          uploadChannel->SetUploadStream(mUploadStream, EmptyCString(),
                           -1);
        } else {
          const char *ctype =
            mRequestHead.PeekHeader(nsHttp::Content_Type);
          const char *clen =
            mRequestHead.PeekHeader(nsHttp::Content_Length);
          if (!ctype) {
            ctype = "application/octet-stream";
          }
          if (clen) {
            uploadChannel->SetUploadStream(mUploadStream,
                                           nsDependentCString(ctype),
                                           atoi(clen));
          }
        }
      }
    }
    // since preserveMethod is true, we need to ensure that the appropriate 
    // request method gets set on the channel, regardless of whether or not 
    // we set the upload stream above. This means SetRequestMethod() will
    // be called twice if ExplicitSetUploadStream() gets called above.

    httpChannel->SetRequestMethod(nsDependentCString(mRequestHead.Method()));
  }
  // convey the referrer if one was used for this channel to the next one
  if (mReferrer)
    httpChannel->SetReferrer(mReferrer);
  // convey the mAllowPipelining flag
  httpChannel->SetAllowPipelining(mAllowPipelining);
  // convey the new redirection limit
  httpChannel->SetRedirectionLimit(mRedirectionLimit - 1);

  nsCOMPtr<nsIHttpChannelInternal> httpInternal = do_QueryInterface(newChannel);
  if (httpInternal) {
    // convey the mForceAllowThirdPartyCookie flag
    httpInternal->SetForceAllowThirdPartyCookie(mForceAllowThirdPartyCookie);
    // convey the spdy flag
    httpInternal->SetAllowSpdy(mAllowSpdy);

    // update the DocumentURI indicator since we are being redirected.
    // if this was a top-level document channel, then the new channel
    // should have its mDocumentURI point to newURI; otherwise, we
    // just need to pass along our mDocumentURI to the new channel.
    if (newURI && (mURI == mDocumentURI))
      httpInternal->SetDocumentURI(newURI);
//.........这里部分代码省略.........

//.........这里部分代码省略.........
  if (NS_FAILED(rv)) return rv;
  if (match) {
    nsCAutoString path;
    rv = referrer->GetPath(path);
    if (NS_FAILED(rv)) return rv;

    PRUint32 pathLength = path.Length();
    if (pathLength <= 2) return NS_ERROR_FAILURE;

    // Path is of the form "//123/http://foo/bar", with a variable number of digits.
    // To figure out where the "real" URL starts, search path for a '/', starting at 
    // the third character.
    PRInt32 slashIndex = path.FindChar('/', 2);
    if (slashIndex == kNotFound) return NS_ERROR_FAILURE;

    // Get the charset of the original URI so we can pass it to our fixed up URI.
    nsCAutoString charset;
    referrer->GetOriginCharset(charset);

    // Replace |referrer| with a URI without wyciwyg://123/.
    rv = NS_NewURI(getter_AddRefs(referrerGrip),
                   Substring(path, slashIndex + 1, pathLength - slashIndex - 1),
                   charset.get());
    if (NS_FAILED(rv)) return rv;

    referrer = referrerGrip.get();
  }

  //
  // block referrer if not on our white list...
  //
  static const char *const referrerWhiteList[] = {
    "http",
    "https",
    "ftp",
    "gopher",
    nsnull
  };
  match = false;
  const char *const *scheme = referrerWhiteList;
  for (; *scheme && !match; ++scheme) {
    rv = referrer->SchemeIs(*scheme, &match);
    if (NS_FAILED(rv)) return rv;
  }
  if (!match)
    return NS_OK; // kick out....

  //
  // Handle secure referrals.
  //
  // Support referrals from a secure server if this is a secure site
  // and (optionally) if the host names are the same.
  //
  rv = referrer->SchemeIs("https", &match);
  if (NS_FAILED(rv)) return rv;
  if (match) {
    rv = mURI->SchemeIs("https", &match);
    if (NS_FAILED(rv)) return rv;
    if (!match)
      return NS_OK;

    if (!gHttpHandler->SendSecureXSiteReferrer()) {
      nsCAutoString referrerHost;
      nsCAutoString host;

      rv = referrer->GetAsciiHost(referrerHost);
      if (NS_FAILED(rv)) return rv;

      rv = mURI->GetAsciiHost(host);
      if (NS_FAILED(rv)) return rv;

      // GetAsciiHost returns lowercase hostname.
      if (!referrerHost.Equals(host))
        return NS_OK;
    }
  }

  nsCOMPtr<nsIURI> clone;
  //
  // we need to clone the referrer, so we can:
  //  (1) modify it
  //  (2) keep a reference to it after returning from this function
  //
  // Use CloneIgnoringRef to strip away any fragment per RFC 2616 section 14.36
  rv = referrer->CloneIgnoringRef(getter_AddRefs(clone));
  if (NS_FAILED(rv)) return rv;

  // strip away any userpass; we don't want to be giving out passwords ;-)
  rv = clone->SetUserPass(EmptyCString());
  if (NS_FAILED(rv)) return rv;

  nsCAutoString spec;
  rv = clone->GetAsciiSpec(spec);
  if (NS_FAILED(rv)) return rv;

  // finally, remember the referrer URI and set the Referer header.
  mReferrer = clone;
  mRequestHead.SetHeader(nsHttp::Referer, spec);
  return NS_OK;
}

NS_IMETHODIMP
nsAddbookProtocolHandler::NewChannel(nsIURI *aURI, nsILoadInfo *aLoadInfo,
                                     nsIChannel **_retval) {
  nsresult rv;
  nsCOMPtr<nsIAddbookUrl> addbookUrl = do_QueryInterface(aURI, &rv);
  NS_ENSURE_SUCCESS(rv, rv);

  rv = addbookUrl->GetAddbookOperation(&mAddbookOperation);
  NS_ENSURE_SUCCESS(rv, rv);

  if (mAddbookOperation == nsIAddbookUrlOperation::InvalidUrl) {
    nsAutoString errorString;
    errorString.AssignLiteral("Unsupported format/operation requested for ");
    nsAutoCString spec;
    rv = aURI->GetSpec(spec);
    NS_ENSURE_SUCCESS(rv, rv);

    errorString.Append(NS_ConvertUTF8toUTF16(spec));
    rv = GenerateXMLOutputChannel(errorString, addbookUrl, aURI, aLoadInfo,
                                  _retval);
    NS_ENSURE_SUCCESS(rv, rv);
    return NS_OK;
  }

  if (mAddbookOperation == nsIAddbookUrlOperation::AddVCard) {
    // create an empty pipe for use with the input stream channel.
    nsCOMPtr<nsIAsyncInputStream> pipeIn;
    nsCOMPtr<nsIAsyncOutputStream> pipeOut;
    nsCOMPtr<nsIPipe> pipe = do_CreateInstance("@mozilla.org/pipe;1");

    rv = pipe->Init(false, false, 0, 0);
    NS_ENSURE_SUCCESS(rv, rv);

    // These always succeed because the pipe is initialized above.
    MOZ_ALWAYS_SUCCEEDS(pipe->GetInputStream(getter_AddRefs(pipeIn)));
    MOZ_ALWAYS_SUCCEEDS(pipe->GetOutputStream(getter_AddRefs(pipeOut)));

    pipeOut->Close();
    if (aLoadInfo) {
      return NS_NewInputStreamChannelInternal(
          _retval, aURI, pipeIn.forget(),
          NS_LITERAL_CSTRING("application/x-addvcard"), EmptyCString(),
          aLoadInfo);
    }

    nsCOMPtr<nsIPrincipal> nullPrincipal =
        do_CreateInstance("@mozilla.org/nullprincipal;1", &rv);
    NS_ASSERTION(NS_SUCCEEDED(rv), "CreateInstance of nullprincipal failed.");
    if (NS_FAILED(rv)) return rv;

    return NS_NewInputStreamChannel(
        _retval, aURI, pipeIn.forget(), nullPrincipal,
        nsILoadInfo::SEC_ALLOW_CROSS_ORIGIN_DATA_IS_NULL,
        nsIContentPolicy::TYPE_OTHER,
        NS_LITERAL_CSTRING("application/x-addvcard"));
  }

  nsString output;
  rv = GeneratePrintOutput(addbookUrl, output);
  if (NS_FAILED(rv)) {
    output.AssignLiteral("failed to print. url=");
    nsAutoCString spec;
    rv = aURI->GetSpec(spec);
    NS_ENSURE_SUCCESS(rv, rv);
    output.Append(NS_ConvertUTF8toUTF16(spec));
  }

  rv = GenerateXMLOutputChannel(output, addbookUrl, aURI, aLoadInfo, _retval);
  NS_ENSURE_SUCCESS(rv, rv);
  return NS_OK;
}

nsresult
net_GetFileFromURLSpec(const nsACString &aURL, nsIFile **result)
{
  // NOTE: See also the implementation in nsURLHelperUnix.cpp
  // This matches it except for the HFS path handling and file
  // system charset conversion.

  nsresult rv;

  nsCOMPtr<nsILocalFile> localFile;
  rv = NS_NewNativeLocalFile(EmptyCString(), PR_TRUE, getter_AddRefs(localFile));
  if (NS_FAILED(rv))
    return rv;
  
  nsCAutoString directory, fileBaseName, fileExtension, path;
  PRBool bHFSPath = PR_FALSE;

  rv = net_ParseFileURL(aURL, directory, fileBaseName, fileExtension);
  if (NS_FAILED(rv))
    return rv;

  if (!directory.IsEmpty()) {
    NS_EscapeURL(directory, esc_Directory|esc_AlwaysCopy, path);

    // The canonical form of file URLs on OSX use POSIX paths:
    //   file:///path-name.
    // But, we still encounter file URLs that use HFS paths:
    //   file:///volume-name/path-name
    // Determine that here and normalize HFS paths to POSIX.
    nsCAutoString possibleVolName;
    if (pathBeginsWithVolName(directory, possibleVolName)) {        
      // Though we know it begins with a volume name, it could still
      // be a valid POSIX path if the boot drive is named "Mac HD"
      // and there is a directory "Mac HD" at its root. If such a
      // directory doesn't exist, we'll assume this is an HFS path.
      FSRef testRef;
      possibleVolName.Insert("/", 0);
      if (::FSPathMakeRef((UInt8*)possibleVolName.get(), &testRef, nsnull) != noErr)
        bHFSPath = PR_TRUE;
    }

    if (bHFSPath) {
      // "%2F"s need to become slashes, while all other slashes need to
      // become colons. If we start out by changing "%2F"s to colons, we
      // can reply on SwapSlashColon() to do what we need
      path.ReplaceSubstring("%2F", ":");
      path.Cut(0, 1); // directory begins with '/'
      SwapSlashColon((char *)path.get());
      // At this point, path is an HFS path made using the same
      // algorithm as nsURLHelperMac. We'll convert to POSIX below.
    }
  }
  if (!fileBaseName.IsEmpty())
    NS_EscapeURL(fileBaseName, esc_FileBaseName|esc_AlwaysCopy, path);
  if (!fileExtension.IsEmpty()) {
    path += '.';
    NS_EscapeURL(fileExtension, esc_FileExtension|esc_AlwaysCopy, path);
  }

  NS_UnescapeURL(path);
  if (path.Length() != strlen(path.get()))
    return NS_ERROR_FILE_INVALID_PATH;

  if (bHFSPath)
    convertHFSPathtoPOSIX(path, path);

  // assuming path is encoded in the native charset
  rv = localFile->InitWithNativePath(path);
  if (NS_FAILED(rv))
    return rv;

  NS_ADDREF(*result = localFile);
  return NS_OK;
}

nsresult
nsIndexedToHTML::DoOnStartRequest(nsIRequest* request, nsISupports *aContext,
                                  nsCString& aBuffer) {
    nsresult rv;

    nsCOMPtr<nsIChannel> channel = do_QueryInterface(request);
    nsCOMPtr<nsIURI> uri;
    rv = channel->GetURI(getter_AddRefs(uri));
    if (NS_FAILED(rv)) return rv;

    channel->SetContentType(NS_LITERAL_CSTRING("text/html"));

    mParser = do_CreateInstance("@mozilla.org/dirIndexParser;1",&rv);
    if (NS_FAILED(rv)) return rv;

    rv = mParser->SetListener(this);
    if (NS_FAILED(rv)) return rv;
    
    rv = mParser->OnStartRequest(request, aContext);
    if (NS_FAILED(rv)) return rv;

    nsAutoCString baseUri, titleUri;
    rv = uri->GetAsciiSpec(baseUri);
    if (NS_FAILED(rv)) return rv;
    titleUri = baseUri;

    nsCString parentStr;

    nsCString buffer;
    buffer.AppendLiteral("<!DOCTYPE html>\n<html>\n<head>\n");

    // XXX - should be using the 300: line from the parser.
    // We can't guarantee that that comes before any entry, so we'd have to
    // buffer, and do other painful stuff.
    // I'll deal with this when I make the changes to handle welcome messages
    // The .. stuff should also come from the lower level protocols, but that
    // would muck up the XUL display
    // - bbaetz

    bool isScheme = false;
    bool isSchemeFile = false;
    if (NS_SUCCEEDED(uri->SchemeIs("ftp", &isScheme)) && isScheme) {

        // strip out the password here, so it doesn't show in the page title
        // This is done by the 300: line generation in ftp, but we don't use
        // that - see above
        
        nsAutoCString pw;
        rv = uri->GetPassword(pw);
        if (NS_FAILED(rv)) return rv;
        if (!pw.IsEmpty()) {
             nsCOMPtr<nsIURI> newUri;
             rv = uri->Clone(getter_AddRefs(newUri));
             if (NS_FAILED(rv)) return rv;
             rv = newUri->SetPassword(EmptyCString());
             if (NS_FAILED(rv)) return rv;
             rv = newUri->GetAsciiSpec(titleUri);
             if (NS_FAILED(rv)) return rv;
        }

        nsAutoCString path;
        rv = uri->GetPath(path);
        if (NS_FAILED(rv)) return rv;

        if (!path.EqualsLiteral("//") && !path.LowerCaseEqualsLiteral("/%2f")) {
            rv = uri->Resolve(NS_LITERAL_CSTRING(".."),parentStr);
            if (NS_FAILED(rv)) return rv;
        }
    } else if (NS_SUCCEEDED(uri->SchemeIs("file", &isSchemeFile)) && isSchemeFile) {
        nsCOMPtr<nsIFileURL> fileUrl = do_QueryInterface(uri);
        nsCOMPtr<nsIFile> file;
        rv = fileUrl->GetFile(getter_AddRefs(file));
        if (NS_FAILED(rv)) return rv;
        file->SetFollowLinks(true);
        
        nsAutoCString url;
        rv = net_GetURLSpecFromFile(file, url);
        if (NS_FAILED(rv)) return rv;
        baseUri.Assign(url);
        
        nsCOMPtr<nsIFile> parent;
        rv = file->GetParent(getter_AddRefs(parent));
        
        if (parent && NS_SUCCEEDED(rv)) {
            net_GetURLSpecFromDir(parent, url);
            if (NS_FAILED(rv)) return rv;
            parentStr.Assign(url);
        }

        // Directory index will be always encoded in UTF-8 if this is file url
        buffer.AppendLiteral("<meta charset=\"UTF-8\">\n");

    } else if (NS_SUCCEEDED(uri->SchemeIs("jar", &isScheme)) && isScheme) {
        nsAutoCString path;
        rv = uri->GetPath(path);
        if (NS_FAILED(rv)) return rv;

        // a top-level jar directory URL is of the form jar:foo.zip!/
        // path will be of the form foo.zip!/, and its last two characters
        // will be "!/"
//.........这里部分代码省略.........

nsresult
nsXREDirProvider::GetUserDataDirectoryHome(nsIFile** aFile, bool aLocal)
{
  // Copied from nsAppFileLocationProvider (more or less)
  nsresult rv;
  nsCOMPtr<nsIFile> localDir;

#if defined(XP_MACOSX)
  FSRef fsRef;
  OSType folderType;
  if (aLocal) {
    folderType = kCachedDataFolderType;
  } else {
#ifdef MOZ_THUNDERBIRD
    folderType = kDomainLibraryFolderType;
#else
    folderType = kApplicationSupportFolderType;
#endif
  }
  OSErr err = ::FSFindFolder(kUserDomain, folderType, kCreateFolder, &fsRef);
  NS_ENSURE_FALSE(err, NS_ERROR_FAILURE);

  rv = NS_NewNativeLocalFile(EmptyCString(), true, getter_AddRefs(localDir));
  NS_ENSURE_SUCCESS(rv, rv);

  nsCOMPtr<nsILocalFileMac> dirFileMac = do_QueryInterface(localDir);
  NS_ENSURE_TRUE(dirFileMac, NS_ERROR_UNEXPECTED);

  rv = dirFileMac->InitWithFSRef(&fsRef);
  NS_ENSURE_SUCCESS(rv, rv);

  localDir = do_QueryInterface(dirFileMac, &rv);
#elif defined(XP_IOS)
  nsAutoCString userDir;
  if (GetUIKitDirectory(aLocal, userDir)) {
    rv = NS_NewNativeLocalFile(userDir, true, getter_AddRefs(localDir));
  } else {
    rv = NS_ERROR_FAILURE;
  }
  NS_ENSURE_SUCCESS(rv, rv);
#elif defined(XP_WIN)
  nsString path;
  if (aLocal) {
    rv = GetShellFolderPath(CSIDL_LOCAL_APPDATA, path);
    if (NS_FAILED(rv))
      rv = GetRegWindowsAppDataFolder(aLocal, path);
  }
  if (!aLocal || NS_FAILED(rv)) {
    rv = GetShellFolderPath(CSIDL_APPDATA, path);
    if (NS_FAILED(rv)) {
      if (!aLocal)
        rv = GetRegWindowsAppDataFolder(aLocal, path);
    }
  }
  NS_ENSURE_SUCCESS(rv, rv);

  rv = NS_NewLocalFile(path, true, getter_AddRefs(localDir));
#elif defined(MOZ_WIDGET_GONK)
  rv = NS_NewNativeLocalFile(NS_LITERAL_CSTRING("/data/b2g"), true,
                             getter_AddRefs(localDir));
#elif defined(XP_UNIX)
  const char* homeDir = getenv("HOME");
  if (!homeDir || !*homeDir)
    return NS_ERROR_FAILURE;

#ifdef ANDROID /* We want (ProfD == ProfLD) on Android. */
  aLocal = false;
#endif

  if (aLocal) {
    // If $XDG_CACHE_HOME is defined use it, otherwise use $HOME/.cache.
    const char* cacheHome = getenv("XDG_CACHE_HOME");
    if (cacheHome && *cacheHome) {
      rv = NS_NewNativeLocalFile(nsDependentCString(cacheHome), true,
                                 getter_AddRefs(localDir));
    } else {
      rv = NS_NewNativeLocalFile(nsDependentCString(homeDir), true,
                                 getter_AddRefs(localDir));
      if (NS_SUCCEEDED(rv))
        rv = localDir->AppendNative(NS_LITERAL_CSTRING(".cache"));
    }
  } else {
    rv = NS_NewNativeLocalFile(nsDependentCString(homeDir), true,
                               getter_AddRefs(localDir));
  }
#else
#error "Don't know how to get product dir on your platform"
#endif

  NS_IF_ADDREF(*aFile = localDir);
  return rv;
}