Mercurial > hg > ltpda

annotate m-toolbox/classes/+utils/@mysql/connect.m @ 0:f0afece42f48

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Import.
author Daniele Nicolodi <nicolodi@science.unitn.it>
date Wed, 23 Nov 2011 19:22:13 +0100
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Daniele Nicolodi <nicolodi@science.unitn.it>
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1 % CONNECT connects to an LTPDA repository and returns the connection object.
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2 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
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3 %
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4 % DESCRIPTION: CONNECT connects to an LTPDA repository and returns the
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5 % connection object.
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6 %
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7 % CONNECT stores a persistent set of logins where a login has
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8 % the fields:
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9 % 'hostname' - the hostname of the MySQL server
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10 % 'db' - the name of the database
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11 % 'user' - the username for connection to this db
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12 % 'passwd' - the password for this user
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13 %
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14 % If a login for the requested hostname and db doesn't exist,
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15 % or if the existing login is too old (*) then the user is
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16 % prompted to log in again.
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17 %
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Daniele Nicolodi <nicolodi@science.unitn.it>
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18 % (*) the expiry time for MySQL logins is set to 30s.
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19 %
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20 % CALL: conn = connect(hostname) % connects to 'test' database
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21 % conn = connect(hostname, dbname) % dialog prompt for username and password
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22 % [conn, password] = connect(hostname, dbname) % return password to caller
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23 % conn = connect(hostname, dbname, dbuser, dbpass) % connect with explicit username and password
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24 %
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25 % VERSION: $Id: connect.m,v 1.8 2010/01/22 12:46:08 ingo Exp $
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26 %
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Daniele Nicolodi <nicolodi@science.unitn.it>
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27 % HISTORY: 24-05-2007 M Hewitson
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28 % Creation
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29 %
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30 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
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31
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32
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33 % (*) the expiry time for MySQL logins is a property of the
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34 % LTPDA Toolbox and can be set in the LTPDA Preferences.
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35
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36
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37 function varargout = connect(varargin)
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38
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39 error('### Obsolete as of LTPDA version 2.2. Replaced my the utils class jmysql (utils.jmysql.%s)', mfilename());
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40 if nargin < 1
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41 error('### Incorrect inputs')
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42 end
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43
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44 persistent logins;
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45
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46 prefs = getappdata(0, 'LTPDApreferences');
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47 expTime = prefs.repository.loginExpiry;
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48
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49 dbuser = '';
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50 dbpass = '';
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51
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52 force = false;
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53 if nargin == 1
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54 dbhost = varargin{1};
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55 dbname = 'test';
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56 elseif nargin == 2
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57 dbhost = varargin{1};
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58 dbname = varargin{2};
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59 elseif nargin == 3
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60 dbhost = varargin{1};
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61 dbname = varargin{2};
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62 force = varargin{3};
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63 elseif nargin == 4
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64 dbhost = varargin{1};
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65 dbname = varargin{2};
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66 dbuser = varargin{3};
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67 dbpass = varargin{4};
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68 elseif nargin == 5
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69 dbhost = varargin{1};
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70 dbname = varargin{2};
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71 dbuser = varargin{3};
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72 dbpass = varargin{4};
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73 force = varargin{5};
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74 end
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75
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76 if isempty(logins)
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77 % Prompt for username and password
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78 [dbuser, dbpass] = getlogin(dbhost, dbname, dbuser, dbpass, force);
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79
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Daniele Nicolodi <nicolodi@science.unitn.it>
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80 % in the case the user clicks cancel
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Daniele Nicolodi <nicolodi@science.unitn.it>
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81 if ~ischar(dbuser) && ~ischar(dbpass)
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82 if (dbuser == -1 && dbpass == -1)
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Daniele Nicolodi <nicolodi@science.unitn.it>
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83 varargout{1} = -1;
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84 varargout{2} = -1;
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85 return
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86 end
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87 end
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88
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89 % Create a new login
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90 login.hostname = dbhost;
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Daniele Nicolodi <nicolodi@science.unitn.it>
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91 login.db = dbname;
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92 login.user = dbuser;
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93 login.passwd = dbpass;
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94 login.ts = now;
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95
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96 % store this login
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97 logins = [logins login];
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98
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99 else
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100 % look for a login to this hostname/db
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101 loginFound = false;
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Daniele Nicolodi <nicolodi@science.unitn.it>
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102 for kk=1:numel(logins)
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Daniele Nicolodi <nicolodi@science.unitn.it>
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103 login = logins(kk);
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Daniele Nicolodi <nicolodi@science.unitn.it>
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104 dt = (now - login.ts) * 86400; % [s]
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Daniele Nicolodi <nicolodi@science.unitn.it>
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105 if strcmp(login.hostname, dbhost) && strcmp(login.db, dbname)
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106 if dt < expTime
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Daniele Nicolodi <nicolodi@science.unitn.it>
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107 % get the username and password from here
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108 dbuser = login.user;
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109 dbpass = login.passwd;
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110 logins(kk).ts = now;
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111 loginFound = true;
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112 break;
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113 end
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114 end
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115 end
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116
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117 % If we didn't find a login then create a new one
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118 if force || isempty(dbuser) || isempty(dbpass)
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119 [dbuser, dbpass] = getlogin(dbhost, dbname, dbuser, dbpass, force);
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120
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121 % Create a new login
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122 login.hostname = dbhost;
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123 login.db = dbname;
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124 login.user = dbuser;
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125 login.passwd = dbpass;
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126 login.ts = now;
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127
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128 % store this login
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129 if ~loginFound
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130 logins = [logins login];
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131 end
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132 end
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133
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134 end
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135
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136 %% return if we don't have a dbuser
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137 if isempty(dbuser)
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Daniele Nicolodi <nicolodi@science.unitn.it>
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138 return
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139 end
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140
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Daniele Nicolodi <nicolodi@science.unitn.it>
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141 %% Database settings
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142 dbdriver = getappdata(0, 'mysql_driver');
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143 dburl = sprintf('jdbc:mysql://%s/%s',dbhost,dbname);
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144
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145 disp(sprintf('** Connecting to %s as %s...', dbhost, dbuser))
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146
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147 conn = database(dbname,dbuser,dbpass,dbdriver,dburl);
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148 disp('** Connection status:')
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Daniele Nicolodi <nicolodi@science.unitn.it>
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149 disp(ping(conn))
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150
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Daniele Nicolodi <nicolodi@science.unitn.it>
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151 % Set outputs
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Daniele Nicolodi <nicolodi@science.unitn.it>
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152 if nargout > 0
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153 varargout{1} = conn;
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154 if nargout == 2
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155 varargout{2} = dbpass;
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156 end
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157 end
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158
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159 end
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160
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161 function [dbuser, dbpass] = getlogin(dbhost, dbname, dbuser, dbpass, force)
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162
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Daniele Nicolodi <nicolodi@science.unitn.it>
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163 % first try defaults
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Daniele Nicolodi <nicolodi@science.unitn.it>
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164 if isempty(dbuser)
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Daniele Nicolodi <nicolodi@science.unitn.it>
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165 dbuser = getappdata(0, 'ltpda_repo_user');
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Daniele Nicolodi <nicolodi@science.unitn.it>
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166 end
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Daniele Nicolodi <nicolodi@science.unitn.it>
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167 if isempty(dbpass)
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Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
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168 dbpass = getappdata(0, 'ltpda_repo_pass');
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Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
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169 end
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Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
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170
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Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
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171 % then log-in dialog
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Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
diff changeset
172 if force || isempty(dbuser) || isempty(dbpass)
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Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
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173
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Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
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174 ld = logindialog.LoginDialog([], true);
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Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
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175 ld.setVisible(true)
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Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
diff changeset
176 if ~ld.isCancelled
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Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
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177 dbuser = char(ld.getUsername);
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Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
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178 dbpass = [char(ld.getPassword)]'; % for some reason we get a column here, so transpose.
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Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
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179 end
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Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
diff changeset
180
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Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
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181 if isempty(dbuser) || isempty(dbpass)
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Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
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182 warning('!!! Login process cancelled.');
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Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
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183 dbuser = -1;
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Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
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184 dbpass = -1;
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Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
diff changeset
185 return
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Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
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186 end
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Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
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187 end
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Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
diff changeset
188
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Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
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189 end