URLPoster.m

%% Copyright (c) 2014-2014, Yichao Yu <yyc1992@gmail.com>
%
% This library is free software; you can redistribute it and/or
% modify it under the terms of the GNU Lesser General Public
% License as published by the Free Software Foundation; either
% version 3.0 of the License, or (at your option) any later version.
% This library is distributed in the hope that it will be useful,
% but WITHOUT ANY WARRANTY; without even the implied warranty of
% MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
% Lesser General Public License for more details.
% You should have received a copy of the GNU Lesser General Public
% License along with this library.

classdef URLPoster < handle
    properties
        url_str;
        pyconn;
    end

    methods(Access = private)
        function self = URLPoster(url_str)
            self.url_str = url_str;
            [path, ~, ~] = fileparts(mfilename('fullpath'));
            pyglob = py.dict(pyargs('mat_srcpath', path));
            try
                py.exec('from URLPoster import URLPoster', pyglob);
            catch
                py.exec('import sys; sys.path.append(mat_srcpath)', pyglob);
                py.exec('from URLPoster import URLPoster', pyglob);
            end
            pylocal = py.dict(pyargs('url', self.url_str));
            self.pyconn = py.eval('URLPoster(url)', pyglob, pylocal);
        end
    end

    methods
        function post(self, data, files)
            self.pyconn.post(py.dict(pyargs(data{:})), ...
                             py.dict(pyargs(files{:})));
        end

        function output = reply(self)
            %% DO NOT REMOVE THE REPLY FUNCTION!!!!!!!!!!!!!!!!!!!!!!!!
            %% YOU HAVE ABSOLUTELY NO IDEA WHAT YOU ARE DOING IF YOU EVER THINK
            %% DOING THIS !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
            output = char(self.pyconn.reply());
        end
    end

    properties(Constant, Access=private)
        cache = containers.Map();
    end
    methods(Static)
        function dropAll()
            remove(URLPoster.cache, keys(URLPoster.cache));
        end
        function res = get(url)
            cache = URLPoster.cache;
            if isKey(cache, url)
                res = cache(url);
                if ~isempty(res) && isvalid(res)
                    return;
                end
            end
            res = URLPoster(url);
            cache(url) = res;
        end
    end
end