function [urlConnection,errorid,errormsg] = urlreadwrite(fcn,urlChar)
%URLREADWRITE A helper function for URLREAD and URLWRITE.
% Matthew J. Simoneau, June 2005
% Copyright 1984-2005 The MathWorks, Inc.
% $Revision: 1.1.6.1 $ $Date: 2005/06/21 19:35:35 $
% Default output arguments.
urlConnection = [];
errorid = '';
errormsg = '';
% Determine the protocol (before the ":").
protocol = urlChar(1:min(find(urlChar==':'))-1);
% Try to use the native handler, not the ice.* classes.
switch protocol
case 'http'
try
handler = sun.net.www.protocol.http.Handler;
catch
handler = [];
end
case 'https'
try
handler = sun.net.www.protocol.https.Handler;
catch
handler = [];
end
otherwise
handler = [];
end
% Create the URL object.
try
if isempty(handler)
url = java.net.URL(urlChar);
else
url = java.net.URL([],urlChar,handler);
end
catch
errorid = ['MATLAB:' fcn ':InvalidUrl'];
errormsg = 'Either this URL could not be parsed or the protocol is not supported.';
return
end
% Determine the proxy.
proxy = [];
if ~isempty(java.lang.System.getProperty('http.proxyHost'))
try
ps = java.net.ProxySelector.getDefault.select(java.net.URI(urlChar));
if (ps.size > 0)
proxy = ps.get(0);
end
catch
proxy = [];
end
end
% Open a connection to the URL.
if isempty(proxy)
urlConnection = url.openConnection;
else
urlConnection = url.openConnection(proxy);
end