otbCurlHelper.h

Go to the documentation of this file.

/*
 * Copyright (C) 2005-2022 Centre National d'Etudes Spatiales (CNES)
 *
 * This file is part of Orfeo Toolbox
 *
 *     https://www.orfeo-toolbox.org/
 *
 * Licensed under the Apache License, Version 2.0 (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.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
 
#ifndef otbCurlHelper_h
#define otbCurlHelper_h
 
#include "otbCurlHelperInterface.h"
#include <string>
 
namespace otb
{
class OTBCurlAdapters_EXPORT CurlHelper : public CurlHelperInterface
{
public:
 
  typedef CurlHelper                    Self;
  typedef itk::SmartPointer<Self>       Pointer;
  typedef itk::SmartPointer<const Self> ConstPointer;
  typedef CurlHelperInterface           Superclass;
 
  itkTypeMacro(CurlHelper, CurlHelperInterface);
  itkNewMacro(Self);
 
  bool TestUrlAvailability(const std::string& url) const override;
 
  bool IsCurlReturnHttpError(const std::string& url) const;
 
  int RetrieveFile(const std::ostringstream& urlStream, std::string filename) const override;
 
  int RetrieveFile(const std::string& urlString, std::string filename) const override;
 
  int RetrieveUrlInMemory(const std::string& urlString, std::string& output) const override;
 
  int RetrieveFileMulti(const std::vector<std::string>& listURLs, const std::vector<std::string>& listFiles, int maxConnect) const override;
 
  itkGetMacro(Timeout, long int);
 
  itkSetMacro(Timeout, long int);
 
protected:
  CurlHelper()
    : m_Browser(
          "Mozilla/5.0 (Windows; U; Windows NT 6.0; en-GB; rv:1.8.1.11) "
          "Gecko/20071127 Firefox/2.0.0.11"),
      m_Timeout(10)
  {
  }
  ~CurlHelper() override
  {
  }
 
private:
  CurlHelper(const Self&) = delete;
  void operator=(const Self&) = delete;
 
  // Need to use our writing function to handle windows segfaults
  // Need to be static cause the CURL_OPT is expecting a pure C
  // function or a static c++ method.
  static size_t CallbackWriteDataToFile(void* ptr, size_t size, size_t nmemb, void* data);
 
  static size_t CallbackWriteDataToStringStream(void* ptr, size_t size, size_t nmemb, void* data);
 
  static size_t CallbackWriteDataDummy(void* ptr, size_t size, size_t nmemb, void* data);
 
  // Browser Agent used
  std::string m_Browser;
  long int    m_Timeout;
};
}
#endif