Ziele Untersuchung
mit Columbo Integrität von
Datenbanken Interaktion und
Portierbarkeit Ergonomie der
Schnittstellen

Angebot Produkte Projekt Beratung

Mittel Analytik Modellierung Sprachen Algebra Logik Hardware Denken Kreativität

Zusammenhänge Gesellschaft Wirtschaft Branche Firma


products/sources/formale Sprachen/C/Firefox/netwerk/base/ (Browser von der Mozilla Stiftung Version 136.0.1^©) Datei vom 10.2.2025 mit Größe 4 kB

Quelle nsStreamLoader.cpp Sprache: C

/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* 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/. */

#include "nsStreamLoader.h"
#include "nsIInputStream.h"
#include "nsIChannel.h"
#include "nsError.h"
#include "mozilla/ProfilerLabels.h"

#include <limits>

namespace mozilla {
namespace net {

nsStreamLoader::nsStreamLoader() = default;

NS_IMETHODIMP
nsStreamLoader::Init(nsIStreamLoaderObserver* aStreamObserver,
                     nsIRequestObserver* aRequestObserver) {
  NS_ENSURE_ARG_POINTER(aStreamObserver);
  mObserver = aStreamObserver;
  mRequestObserver = aRequestObserver;
  return NS_OK;
}

nsresult nsStreamLoader::Create(REFNSIID aIID, void** aResult) {
  RefPtr<nsStreamLoader> it = new nsStreamLoader();
  return it->QueryInterface(aIID, aResult);
}

NS_IMPL_ISUPPORTS(nsStreamLoader, nsIStreamLoader, nsIRequestObserver,
                  nsIStreamListener, nsIThreadRetargetableStreamListener)

NS_IMETHODIMP
nsStreamLoader::GetNumBytesRead(uint32_t* aNumBytes) {
  *aNumBytes = mBytesRead;
  return NS_OK;
}

NS_IMETHODIMP
nsStreamLoader::GetRequest(nsIRequest** aRequest) {
  nsCOMPtr<nsIRequest> req = mRequest;
  req.forget(aRequest);
  return NS_OK;
}

NS_IMETHODIMP
nsStreamLoader::OnStartRequest(nsIRequest* request) {
  nsCOMPtr<nsIChannel> chan(do_QueryInterface(request));
  if (chan) {
    int64_t contentLength = -1;
    chan->GetContentLength(&contentLength);
    if (contentLength >= 0) {
      // On 64bit platforms size of uint64_t coincides with the size of size_t,
      // so we want to compare with the minimum from size_t and int64_t.
      if (static_cast<uint64_t>(contentLength) >
          std::min(std::numeric_limits<size_t>::max(),
                   static_cast<size_t>(std::numeric_limits<int64_t>::max()))) {
        // Too big to fit into size_t, so let's bail.
        return NS_ERROR_OUT_OF_MEMORY;
      }
      // preallocate buffer
      if (!mData.initCapacity(contentLength)) {
        return NS_ERROR_OUT_OF_MEMORY;
      }
    }
  }
  if (mRequestObserver) {
    mRequestObserver->OnStartRequest(request);
  }
  return NS_OK;
}

NS_IMETHODIMP
nsStreamLoader::OnStopRequest(nsIRequest* request, nsresult aStatus) {
  AUTO_PROFILER_LABEL("nsStreamLoader::OnStopRequest", NETWORK);

  if (mObserver) {
    // provide nsIStreamLoader::request during call to OnStreamComplete
    mRequest = request;
    size_t length = mData.length();
    uint8_t* elems = mData.extractOrCopyRawBuffer();
    nsresult rv =
        mObserver->OnStreamComplete(this, mContext, aStatus, length, elems);
    if (rv != NS_SUCCESS_ADOPTED_DATA) {
      // The observer didn't take ownership of the extracted data buffer, so
      // put it back into mData.
      mData.replaceRawBuffer(elems, length);
    }
    // done.. cleanup
    ReleaseData();
    mRequest = nullptr;
    mObserver = nullptr;
  }

  if (mRequestObserver) {
    mRequestObserver->OnStopRequest(request, aStatus);
    mRequestObserver = nullptr;
  }

  return NS_OK;
}

nsresult nsStreamLoader::WriteSegmentFun(nsIInputStream* inStr, void* closure,
                                         const char* fromSegment,
                                         uint32_t toOffset, uint32_t count,
                                         uint32_t* writeCount) {
  nsStreamLoader* self = (nsStreamLoader*)closure;

  if (!self->mData.append(fromSegment, count)) {
    self->mData.clearAndFree();
    return NS_ERROR_OUT_OF_MEMORY;
  }

  *writeCount = count;
  return NS_OK;
}

NS_IMETHODIMP
nsStreamLoader::OnDataAvailable(nsIRequest* request, nsIInputStream* inStr,
                                uint64_t sourceOffset, uint32_t count) {
  uint32_t countRead;
  nsresult rv = inStr->ReadSegments(WriteSegmentFun, this, count, &countRead);
  NS_ENSURE_SUCCESS(rv, rv);
  mBytesRead += countRead;
  return NS_OK;
}

void nsStreamLoader::ReleaseData() { mData.clearAndFree(); }

NS_IMETHODIMP
nsStreamLoader::CheckListenerChain() { return NS_OK; }

NS_IMETHODIMP
nsStreamLoader::OnDataFinished(nsresult) { return NS_OK; }

}  // namespace net
}  // namespace mozilla

quality100%

¤ Dauer der Verarbeitung: 0.15 Sekunden (vorverarbeitet) ¤

Wurzel

Suchen

Beweissystem der NASA

Beweissystem Isabelle

NIST Cobol Testsuite

Cephes Mathematical Library

Wiener Entwicklungsmethode

Haftungshinweis

Die Informationen auf dieser Webseite wurden nach bestem Wissen sorgfältig zusammengestellt. Es wird jedoch weder Vollständigkeit, noch Richtigkeit, noch Qualität der bereit gestellten Informationen zugesichert.