/*

%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%

%                                                                             %

%                                                                             %

%                                                                             %

%                            U   U  RRRR   L                                  %

%                            U   U  R   R  L                                  %

%                            U   U  RRRR   L                                  %

%                            U   U  R R    L                                  %

%                             UUU   R  R   LLLLL                              %

%                                                                             %

%                                                                             %

%                        Retrieve An Image Via URL.                           %

%                                                                             %

%                              Software Design                                %

%                                   Cristy                                    %

%                              Bill Radcliffe                                 %

%                                March 2000                                   %

%                                                                             %

%                                                                             %

%  Copyright @ 1999 ImageMagick Studio LLC, a non-profit organization         %

%  dedicated to making software imaging solutions freely available.           %

%                                                                             %

%  You may not use this file except in compliance with the License.  You may  %

%  obtain a copy of the License at                                            %

%                                                                             %

%    https://imagemagick.org/script/license.php                               %

%                                                                             %

%  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.                                             %

%                                                                             %

%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%

%

%

*/

/*

  Include declarations.

*/

#include "MagickCore/studio.h"

#include "MagickCore/blob.h"

#include "MagickCore/blob-private.h"

#include "MagickCore/constitute.h"

#include "MagickCore/delegate.h"

#include "MagickCore/exception.h"

#include "MagickCore/exception-private.h"

#include "MagickCore/image.h"

#include "MagickCore/image-private.h"

#include "MagickCore/list.h"

#include "MagickCore/magick.h"

#include "MagickCore/memory_.h"

#include "MagickCore/module.h"

#include "MagickCore/nt-base-private.h"

#include "MagickCore/quantum-private.h"

#include "MagickCore/static.h"

#include "MagickCore/resource_.h"

#include "MagickCore/string_.h"

#include "MagickCore/utility.h"

#if defined(MAGICKCORE_WINDOWS_SUPPORT)

#  include <urlmon.h>

#  if !defined(__MINGW32__)

#    pragma comment(lib, "urlmon.lib")

#  endif

#endif

/*

%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%

%                                                                             %

%                                                                             %

%                                                                             %

%   R e a d U R L I m a g e                                                   %

%                                                                             %

%                                                                             %

%                                                                             %

%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%

%

%  ReadURLImage retrieves an image via URL, decodes the image, and returns

%  it.  It allocates the memory necessary for the new Image structure and

%  returns a pointer to the new image.

%

%  The format of the ReadURLImage method is:

%

%      Image *ReadURLImage(const ImageInfo *image_info,ExceptionInfo *exception)

%

%  A description of each parameter follows:

%

%    o image_info: the image info.

%

%    o exception: return any errors or warnings in this structure.

%

*/

#if !defined(MAGICKCORE_WINDOWS_SUPPORT)

static Image* InvokeURLDelegate(ImageInfo* read_info,Image* image,

  const char *delegate,ExceptionInfo* exception)

{

  Image

    *images,

    *next;

  MagickBooleanType

    status;

  images=(Image *) NULL;

  status=InvokeDelegate(read_info,image,delegate,(char *) NULL,

    exception);

  if (status != MagickFalse)

    {

      (void) FormatLocaleString(read_info->filename,MagickPathExtent,

        "%s.dat",read_info->unique);

      *read_info->magick='\0';

      images=ReadImage(read_info,exception);

      (void) RelinquishUniqueFileResource(read_info->filename);

      if (images != (Image *) NULL)

        for (next=images; next != (Image *) NULL; next=next->next)

          (void) CopyMagickString(next->filename,image->filename,

            MagickPathExtent);

    }

  return(images);

}

#endif

static Image *ReadURLImage(const ImageInfo *image_info,ExceptionInfo *exception)

{

  char

    filename[MagickPathExtent];

  FILE

    *file;

  Image

    *image,

    *images,

    *next;

  ImageInfo

    *read_info;

  int

    unique_file;

  images=(Image *) NULL;

  image=AcquireImage(image_info,exception);

  read_info=CloneImageInfo(image_info);

  SetImageInfoBlob(read_info,(void *) NULL,0);

#if !defined(MAGICKCORE_WINDOWS_SUPPORT)

  if (LocaleCompare(read_info->magick,"http") == 0)

    {

      images=InvokeURLDelegate(read_info,image,"http:decode",exception);

      read_info=DestroyImageInfo(read_info);

      image=DestroyImage(image);

      return(images);

    }

  if (LocaleCompare(read_info->magick,"https") == 0)

    {

      images=InvokeURLDelegate(read_info,image,"https:decode",exception);

      read_info=DestroyImageInfo(read_info);

      image=DestroyImage(image);

      return(images);

    }

#endif

  if (LocaleCompare(read_info->magick,"file") == 0)

    {

      (void) CopyMagickString(read_info->filename,image_info->filename+2,

        MagickPathExtent);

      *read_info->magick='\0';

      images=ReadImage(read_info,exception);

      read_info=DestroyImageInfo(read_info);

      image=DestroyImage(image);

      return(GetFirstImageInList(images));

    }

  file=(FILE *) NULL;

  unique_file=AcquireUniqueFileResource(read_info->filename);

  if (unique_file != -1)

    file=fdopen(unique_file,"wb");

  if ((unique_file == -1) || (file == (FILE *) NULL))

    {

      ThrowFileException(exception,FileOpenError,"UnableToCreateTemporaryFile",

        read_info->filename);

      read_info=DestroyImageInfo(read_info);

      image=DestroyImage(image);

      return((Image *) NULL);

    }

  (void) CopyMagickString(filename,image_info->magick,MagickPathExtent);

  (void) ConcatenateMagickString(filename,":",MagickPathExtent);

  LocaleLower(filename);

  (void) ConcatenateMagickString(filename,image_info->filename,

    MagickPathExtent);

#if defined(MAGICKCORE_WINDOWS_SUPPORT)

  (void) fclose(file);

  if (URLDownloadToFile(NULL,filename,read_info->filename,0,NULL) != S_OK)

    {

      ThrowFileException(exception,FileOpenError,"UnableToOpenFile",

        filename);

      (void) RelinquishUniqueFileResource(read_info->filename);

      read_info=DestroyImageInfo(read_info);

      image=DestroyImage(image);

      return((Image *) NULL);

    }

#else

  (void) fclose(file);

#endif

  *read_info->magick='\0';

  images=ReadImage(read_info,exception);

  (void) RelinquishUniqueFileResource(read_info->filename);

  if (images != (Image *) NULL)

    for (next=images; next != (Image *) NULL; next=next->next)

      (void) CopyMagickString(next->filename,image->filename,MagickPathExtent);

  read_info=DestroyImageInfo(read_info);

  image=DestroyImage(image);

  if (images != (Image *) NULL)

    GetPathComponent(image_info->filename,TailPath,images->filename);

  else

    {

      (void) ThrowMagickException(exception,GetMagickModule(),CoderError,

        "NoDataReturned","`%s'",filename);

      return((Image *) NULL);

    }

  return(GetFirstImageInList(images));

}

/*

%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%

%                                                                             %

%                                                                             %

%                                                                             %

%   R e g i s t e r U R L I m a g e                                           %

%                                                                             %

%                                                                             %

%                                                                             %

%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%

%

%  RegisterURLImage() adds attributes for the URL image format to

%  the list of supported formats.  The attributes include the image format

%  tag, a method to read and/or write the format, whether the format

%  supports the saving of more than one frame to the same file or blob,

%  whether the format supports native in-memory I/O, and a brief

%  description of the format.

%

%  The format of the RegisterURLImage method is:

%

%      size_t RegisterURLImage(void)

%

*/

ModuleExport size_t RegisterURLImage(void)

{

  MagickInfo

    *entry;

  entry=AcquireMagickInfo("URL","HTTP","Uniform Resource Locator (http://)");

  entry->decoder=(DecodeImageHandler *) ReadURLImage;

  entry->format_type=ImplicitFormatType;

  (void) RegisterMagickInfo(entry);

  entry=AcquireMagickInfo("URL","HTTPS","Uniform Resource Locator (https://)");

  entry->decoder=(DecodeImageHandler *) ReadURLImage;

  entry->format_type=ImplicitFormatType;

  (void) RegisterMagickInfo(entry);

  entry=AcquireMagickInfo("URL","FTP","Uniform Resource Locator (ftp://)");

#if defined(MAGICKCORE_WINDOWS_SUPPORT)

  entry->decoder=(DecodeImageHandler *) ReadURLImage;

#endif

  entry->format_type=ImplicitFormatType;

  (void) RegisterMagickInfo(entry);

  entry=AcquireMagickInfo("URL","FILE","Uniform Resource Locator (file://)");

  entry->decoder=(DecodeImageHandler *) ReadURLImage;

  entry->format_type=ImplicitFormatType;

  (void) RegisterMagickInfo(entry);

  return(MagickImageCoderSignature);

}

/*

%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%

%                                                                             %

%                                                                             %

%                                                                             %

%   U n r e g i s t e r U R L I m a g e                                       %

%                                                                             %

%                                                                             %

%                                                                             %

%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%

%

%  UnregisterURLImage() removes format registrations made by the

%  URL module from the list of supported formats.

%

%  The format of the UnregisterURLImage method is:

%

%      UnregisterURLImage(void)

%

*/

ModuleExport void UnregisterURLImage(void)

{

  (void) UnregisterMagickInfo("HTTP");

  (void) UnregisterMagickInfo("FTP");

  (void) UnregisterMagickInfo("FILE");

}