1:- module(
    2  rdf_download,
    3  [
    4    rdf_download/1, % +Uri
    5    rdf_download/2, % +Uri, ?File
    6    rdf_download/3  % +Uri, ?File, +Options
    7  ]
    8).

   14:- use_module(library(apply)).   15:- use_module(library(yall)).   16
   17:- use_module(library(dict)).   18:- use_module(library(file_ext)).   19:- use_module(library(http_client2)).   20:- use_module(library(rdf_clean)).   21:- use_module(library(rdf_deref)).   22:- use_module(library(rdf_export)).   23:- use_module(library(uri_ext)).

 rdf_download(+Uri:uri) is det

 rdf_download(+Uri:uri, ?File:atom) is det

 rdf_download(+Uri:uri, ?File:atom, +Options:options) is det

Arguments:

Options

- are passed to rdf_deref_uri/3.

   33rdf_download(Uri) :-
   34  rdf_download(Uri, _).
   35
   36
   37rdf_download(Uri, File) :-
   38  rdf_download(Uri, File, options{}).
   39
   40
   41rdf_download(Uri, File, Options) :-
   42  ensure_file_(Uri, File),
   43  (   uri_file_is_fresh(Uri, File)
   44  ->  true
   45  ;   write_to_file(
   46        File,
   47        {Uri,Options}/[Out0]>>rdf_deref_uri(Uri, callback_(Out0), Options)
   48      )
   49  ).
   50
   51callback_(Out, Site, Tuples1, _) :-
   52  convlist(rdf_clean_tuple(Site), Tuples1, Tuples2),
   53  maplist(rdf_write_tuple(Out), Tuples2).
   54
   55ensure_file_(_, File) :-
   56  ground(File), !.
   57ensure_file_(Uri, File) :-
   58  uri_data_file(Uri, data, File)