You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: plugin_urlreadwrite.m
    path of file: ./repos/eeglab/functions/adminfunc
    
    the code of the file until where you have to start completion: function [urlConnection,errorid,errormsg] = plugin_urlreadwrite(fcn,urlChar)
%URLREADWRITE A helper function for URLREAD and URLWRITE.

%   Adapted by A. Delorme from 
%   Matthew J. Simoneau, June 2005
%   Copyright 1984-2011 The MathWorks, Inc.
%   $Revision: 1.1.6.7 $ $Date: 2011/10/22 22:05:21 $

% Default output arguments.
urlConnection = [];

    
function [urlConnection,errorid,errormsg] = plugin_urlreadwrite(fcn,urlChar)
%URLREADWRITE A helper function for URLREAD and URLWRITE.

%   Adapted by A. Delorme from 
%   Matthew J. Simoneau, June 2005
%   Copyright 1984-2011 The MathWorks, Inc.
%   $Revision: 1.1.6.7 $ $Date: 2011/10/22 22:05:21 $

% 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 exception %#ok
            handler = [];
        end