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/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% %
% %
% %
% 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 @ 2000 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/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/quantum-private.h"
#include "MagickCore/static.h"
#include "MagickCore/resource_.h"
#include "MagickCore/string_.h"
#include "MagickCore/utility.h"
#if defined(MAGICKCORE_XML_DELEGATE)
# if defined(MAGICKCORE_WINDOWS_SUPPORT)
# if !defined(__MINGW32__)
# include <win32config.h>
# endif
# endif
# include <libxml/parser.h>
# include <libxml/xmlmemory.h>
#if defined(LIBXML_FTP_ENABLED)
# include <libxml/nanoftp.h>
#endif
#if defined(LIBXML_HTTP_ENABLED)
# include <libxml/nanohttp.h>
#endif
#endif
#if defined(MAGICKCORE_WINDOWS_SUPPORT)
# include <urlmon.h>
# pragma comment(lib, "urlmon.lib")
#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(__cplusplus) || defined(c_plusplus)
extern "C" {
#endif
#if defined(MAGICKCORE_XML_DELEGATE) && defined(LIBXML_FTP_ENABLED)
static void GetFTPData(void *userdata,const char *data,int size)
{
FILE
*file;
size_t
length;
file=(FILE *) userdata;
if (file == (FILE *) NULL)
return;
if (size <= 0)
return;
length=fwrite(data,size,1,file);
(void) length;
}
#endif
#if defined(__cplusplus) || defined(c_plusplus)
}
#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,"https") == 0)
{
MagickBooleanType
status;
/*
Leverage delegate to read HTTPS link.
*/
status=InvokeDelegate(read_info,image,"https:decode",(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);
}
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
#if defined(MAGICKCORE_XML_DELEGATE) && defined(LIBXML_FTP_ENABLED)
if (LocaleCompare(read_info->magick,"ftp") == 0)
{
void
*context;
xmlNanoFTPInit();
context=xmlNanoFTPNewCtxt(filename);
if (context != (void *) NULL)
{
if (xmlNanoFTPConnect(context) >= 0)
(void) xmlNanoFTPGet(context,GetFTPData,(void *) file,
(char *) NULL);
(void) xmlNanoFTPClose(context);
}
}
#endif
#if defined(MAGICKCORE_XML_DELEGATE) && defined(LIBXML_HTTP_ENABLED)
if (LocaleCompare(read_info->magick,"http") == 0)
{
char
buffer[8192],
*type;
int
bytes;
void
*context;
type=(char *) NULL;
context=xmlNanoHTTPMethod(filename,(const char *) NULL,
(const char *) NULL,&type,(const char *) NULL,0);
if (context != (void *) NULL)
{
ssize_t
count;
while ((bytes=xmlNanoHTTPRead(context,buffer,sizeof(buffer))) > 0)
count=(ssize_t) fwrite(buffer,bytes,1,file);
(void) count;
xmlNanoHTTPClose(context);
xmlFree(type);
xmlNanoHTTPCleanup();
}
}
#endif
(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://)");
#if defined(MAGICKCORE_WINDOWS_SUPPORT) || \
(defined(MAGICKCORE_XML_DELEGATE) && defined(LIBXML_HTTP_ENABLED))
entry->decoder=(DecodeImageHandler *) ReadURLImage;
#endif
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) || \
(defined(MAGICKCORE_XML_DELEGATE) && defined(LIBXML_FTP_ENABLED))
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");
}