Mercurial > traipse_dev
annotate orpg/networking/meta_server_lib.py @ 90:d1aff41c031b alpha
Traipse Alpha 'OpenRPG' {090919-00}
Traipse is a distribution of OpenRPG that is designed to be easy to setup and go. Traipse also makes it easy for developers to work on code without fear of sacrifice. 'Ornery-Orc' continues the trend of 'Grumpy' and adds fixes to the code. 'Ornery-Orc''s main goal is to offer more advanced features and enhance the productivity of the user.
Update Summary:
00:
Adds menu changes to draw attention to important updates, errors, or other events. (image info coming soon)
Traipse URL is not included in the repos tab and is set as default.
01:
Fixes Copy for Windows and Linux (finally!!) users.
Fixes incomplete update to Grid and List nodes.
Fixes incomplete update to Chat Commands.
02:
Fixes problems with Remote Image Upload.
Fixes Drop and Drag of Minis to Map.
CherryPy can now use any image in the webfiles/ folder and sub-folders.
CherryPy can now Drop and Drag Minis to the Map.
03:
Minor changes to Update Manager's GUI.
Expert recommendation warning added to Revision Update.
Step down compatibility with open_rpg & component added to orpgCore.
19-00:
Better backwards compatibility in orpgCore.
Using majority of 'Grumpy' network folder to correct server lag.
| author | sirebral |
|---|---|
| date | Sat, 19 Sep 2009 06:45:21 -0500 |
| parents | 449a8900f9ac |
| children | 65c1604e7949 |
| rev | line source |
|---|---|
|
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1 #!/usr/bin/python2.1 |
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2 # Copyright (C) 2000-2001 The OpenRPG Project |
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3 # |
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4 # openrpg-dev@lists.sourceforge.net |
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5 # |
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6 # This program is free software; you can redistribute it and/or modify |
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7 # it under the terms of the GNU General Public License as published by |
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8 # the Free Software Foundation; either version 2 of the License, or |
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9 # (at your option) any later version. |
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10 # |
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11 # This program is distributed in the hope that it will be useful, |
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12 # but WITHOUT ANY WARRANTY; without even the implied warranty of |
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13 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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14 # GNU General Public License for more details. |
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15 # |
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16 # You should have received a copy of the GNU General Public License |
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17 # along with this program; if not, write to the Free Software |
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18 # Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. |
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19 # -- |
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20 # |
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21 # File: meta_server_lib.py |
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22 # Author: Chris Davis |
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23 # Maintainer: |
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24 # Version: |
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25 # $Id: meta_server_lib.py,v 1.40 2007/04/04 01:18:42 digitalxero Exp $ |
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26 # |
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27 # Description: A collection of functions to communicate with the meta server. |
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28 # |
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29 |
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30 |
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31 #added debug flag for meta messages to cut console server spam --Snowdog |
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32 META_DEBUG = 0 |
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33 |
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34 __version__ = "$Id: meta_server_lib.py,v 1.40 2007/04/04 01:18:42 digitalxero Exp $" |
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35 |
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36 from orpg.orpg_version import PROTOCOL_VERSION |
| 90 | 37 from orpg.orpg_xml import xml |
| 38 import orpg.dirpath | |
| 39 import orpg.tools.validate | |
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40 import urllib |
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41 import orpg.minidom |
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42 from threading import * |
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43 import time |
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44 import sys |
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45 import random |
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46 import traceback |
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47 import re |
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48 |
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49 metacache_lock = RLock() |
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50 |
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51 def get_server_dom(data=None,path=None): |
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52 # post data at server and get the resulting DOM |
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53 |
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54 if path == None: |
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55 # get meta server URI |
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56 path = getMetaServerBaseURL() |
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57 |
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58 # POST the data |
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59 if META_DEBUG: |
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60 print |
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61 print "Sending the following POST info to Meta at " + path + ":" |
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62 print "==========================================" |
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63 print data |
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64 print |
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65 file = urllib.urlopen(path, data) |
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66 data = file.read() |
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67 file.close() |
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68 |
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69 # Remove any leading or trailing data. This can happen on some satellite connections |
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70 p = re.compile('(<servers>.*?</servers>)',re.DOTALL|re.IGNORECASE) |
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71 mo = p.search(data) |
| 90 | 72 if mo: |
| 73 data = mo.group(0) | |
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74 |
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75 if META_DEBUG: |
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76 print |
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77 print "Got this string from the Meta at " + path + ":" |
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78 print "===============================================" |
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79 print data |
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80 print |
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81 # build dom |
| 66 | 82 xml_dom = xml.parseXml(data) |
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83 xml_dom = xml_dom._get_documentElement() |
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84 return xml_dom |
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85 |
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86 def post_server_data( name, realHostName=None): |
| 90 | 87 # build POST data |
| 88 ## data = urllib.urlencode( {"server_data[name]":name, | |
| 89 ## "server_data[version]":PROTOCOL_VERSION, | |
| 90 ## "act":"new"} ) | |
| 91 ## | |
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92 if realHostName: |
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93 data = urllib.urlencode( {"server_data[name]":name, |
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94 "server_data[version]":PROTOCOL_VERSION, |
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95 "act":"new", |
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96 "REMOTE_ADDR": realHostName } ) |
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97 |
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98 else: |
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99 #print "Letting meta server decide the hostname to list..." |
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100 data = urllib.urlencode( {"server_data[name]":name, |
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101 "server_data[version]":PROTOCOL_VERSION, |
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102 "act":"new"} ) |
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103 |
| 90 | 104 xml_dom = get_server_dom( data , "http://openrpg.sf.net/openrpg_servers.php") |
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105 ret_val = int( xml_dom.getAttribute( "id" ) ) |
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106 return ret_val |
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107 |
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108 def post_failed_connection(id,meta=None,address=None,port=None): |
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109 # For now, turning this off. This needs to be re-vamped for |
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110 # handling multiple Metas. |
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111 return 0 |
| 90 | 112 # data = urllib.urlencode({"id":id,"act":"failed"}); |
| 113 # xml_dom = get_server_dom(data) | |
| 114 # ret_val = int(xml_dom.getAttribute("return")) | |
| 115 # return ret_val | |
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116 |
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117 def remove_server(id): |
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118 data = urllib.urlencode({"id":id,"act":"del"}); |
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119 xml_dom = get_server_dom(data) |
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120 ret_val = int(xml_dom.getAttribute("return")) |
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121 return ret_val |
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122 |
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123 |
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124 def byStartAttribute(first,second): |
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125 # This function is used to easily sort a list of nodes |
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126 # by their start time |
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127 |
| 90 | 128 if first.hasAttribute("start"): |
| 129 first_start = int(first.getAttribute("start")) | |
| 130 else: | |
| 131 first_start = 0 | |
|
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132 |
| 90 | 133 if second.hasAttribute("start"): |
| 134 second_start = int(second.getAttribute("start")) | |
| 135 else: | |
| 136 second_start = 0 | |
|
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137 |
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138 # Return the result of the cmp function on the two strings |
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139 return cmp(first_start,second_start) |
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140 |
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141 def byNameAttribute(first,second): |
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142 # This function is used to easily sort a list of nodes |
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143 # by their name attribute |
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144 |
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145 # Ensure there is something to sort with for each |
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146 |
| 90 | 147 if first.hasAttribute("name"): |
| 148 first_name = str(first.getAttribute("name")).lower() | |
| 149 else: | |
| 150 first_name = "" | |
|
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151 |
| 90 | 152 if second.hasAttribute("name"): |
| 153 second_name = str(second.getAttribute("name")).lower() | |
| 154 else: | |
| 155 second_name = "" | |
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156 |
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157 # Return the result of the cmp function on the two strings |
| 90 | 158 |
|
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159 return cmp(first_name,second_name) |
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160 |
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161 |
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162 def get_server_list(versions = None,sort_by="start"): |
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163 data = urllib.urlencode({"version":PROTOCOL_VERSION,"ports":"%"}) |
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164 all_metas = getMetaServers(versions,1) # get the list of metas |
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165 base_meta = getMetaServerBaseURL() |
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166 |
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167 #all_metas.reverse() # The last one checked will take precedence, so reverse the order |
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168 # so that the top one on the actual list is checked last |
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169 |
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170 return_hash = {} # this will end up with an amalgamated list of servers |
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171 |
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172 for meta in all_metas: # check all of the metas |
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173 |
| 90 | 174 # get the server's xml from the current meta |
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175 bad_meta = 0 |
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176 #print "Getting server list from " + meta + "..." |
| 90 | 177 try: |
| 178 xml_dom = get_server_dom(data=data,path=meta) | |
|
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179 except: |
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180 #print "Trouble getting servers from " + meta + "..." |
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181 bad_meta = 1 |
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182 |
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183 if bad_meta: |
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184 continue |
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185 |
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186 if base_meta == meta: |
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187 #print "This is our base meta: " + meta |
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188 updateMetaCache(xml_dom) |
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189 |
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190 node_list = xml_dom.getElementsByTagName('server') |
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191 |
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192 if len(node_list): # if there are entries in the node list |
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193 # otherwise, just loop to next meta |
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194 |
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195 # for each node found, we're going to check the nodes from prior |
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196 # metas in the list. If a match is found, then use the new values. |
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197 for n in node_list: |
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198 |
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199 # set them from current node |
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200 |
| 90 | 201 if not n.hasAttribute('name'): |
| 202 n.setAttribute('name','NO_NAME_GIVEN') | |
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203 name = n.getAttribute('name') |
| 90 | 204 if not n.hasAttribute('num_users'): |
| 205 n.setAttribute('num_users','N/A') | |
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206 num_users = n.getAttribute('num_users') |
| 90 | 207 if not n.hasAttribute('address'): |
| 208 n.setAttribute('address','NO_ADDRESS_GIVEN') | |
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209 address = n.getAttribute('address') |
| 90 | 210 if not n.hasAttribute('port'): |
| 211 n.setAttribute('port','6774') | |
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212 port = n.getAttribute('port') |
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213 n.setAttribute('meta',meta) |
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214 end_point = str(address) + ":" + str(port) |
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215 if return_hash.has_key(end_point): |
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216 if META_DEBUG: print "Replacing duplicate server entry at " + end_point |
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217 return_hash[end_point] = n |
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218 |
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219 # At this point, we have an amalgamated list of servers |
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220 # Now, we have to construct a new DOM to pass back. |
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221 |
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222 # Create a servers element |
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223 return_dom = orpg.minidom.Element("servers") |
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224 |
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225 # get the nodes stored in return_hash |
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226 return_list = return_hash.values() |
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227 |
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228 # sort them by their name attribute. Uses byNameAttribute() |
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229 # defined above as a comparison function |
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230 |
| 90 | 231 if sort_by == "start": |
| 232 return_list.sort(byStartAttribute) | |
| 233 elif sort_by == "name": | |
| 234 return_list.sort(byNameAttribute) | |
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235 |
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236 # Add each node to the DOM |
| 90 | 237 for n in return_list: |
| 238 return_dom.appendChild(n) | |
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239 return return_dom |
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240 |
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241 ## List Format: |
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242 ## <servers> |
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243 ## <server address=? id=? name=? failed_count=? > |
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244 ## </servers> |
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245 |
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246 def updateMetaCache(xml_dom): |
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247 try: |
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248 if META_DEBUG: print "Updating Meta Server Cache" |
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249 metaservers = xml_dom.getElementsByTagName( 'metaservers' ) # pull out the metaservers bit |
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250 if len(metaservers) == 0: |
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251 cmetalist = getRawMetaList() |
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252 xml_dom = get_server_dom(cmetalist[0]) |
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253 metaservers = xml_dom.getElementsByTagName( 'metaservers' ) |
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254 authoritative = metaservers[0].getAttribute('auth') |
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255 if META_DEBUG: print " Authoritive Meta: "+str(authoritative) |
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256 metas = metaservers[0].getElementsByTagName("meta") # get the list of metas |
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257 if META_DEBUG: print " Meta List ("+str(len(metas))+" servers)" |
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258 try: |
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259 metacache_lock.acquire() |
| 90 | 260 ini = open(orpg.dirpath.dir_struct["user"]+"metaservers.cache","w") |
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261 for meta in metas: |
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262 if META_DEBUG: print " Writing: "+str(meta.getAttribute('path')) |
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263 ini.write(str(meta.getAttribute('path')) + " " + str(meta.getAttribute('versions')) + "\n") |
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264 ini.close() |
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265 finally: |
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266 metacache_lock.release() |
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267 except Exception, e: |
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268 if META_DEBUG: traceback.print_exc() |
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269 print "Meta Server Lib: UpdateMetaCache(): " + str(e) |
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270 |
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271 def getRawMetaList(): |
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272 try: |
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273 try: |
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274 metacache_lock.acquire() |
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275 # Read in the metas |
| 90 | 276 orpg.tools.validate.Validate().config_file("metaservers.cache","metaservers.cache") |
| 277 ini = open(orpg.dirpath.dir_struct["user"]+"metaservers.cache","r") | |
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278 metas = ini.readlines() |
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279 ini.close() |
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280 return metas |
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281 finally: |
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282 metacache_lock.release() |
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283 except Exception, e: |
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284 if META_DEBUG: traceback.print_exc() |
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285 print "Meta Server Lib: getRawMetaList(): " + str(e) |
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286 return [] |
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287 |
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288 def getMetaServers(versions = None, pick_random=0): |
| 90 | 289 # get meta server URLs as a list |
|
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290 |
| 90 | 291 # versions is a list of acceptable version numbers. |
| 292 # A False truth value will use getMetaServerBaseURL() | |
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293 |
| 90 | 294 # set a default if we have weird reading problems |
| 295 # default_url = "http://www.openrpg.com/openrpg_servers.php" | |
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296 |
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297 meta_names = [] |
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298 |
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299 if(versions): # If versions are supplied, then look in metaservers.conf |
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300 try: |
| 90 | 301 # read in the metas from file |
| 302 # format of file is one meta entry per line | |
| 303 # each entry will be the meta url, followed by one or more version numbers that it | |
| 304 # handle. Generally, this will be either a 1 for the original Meta format, or | |
| 305 # 2 for the new one. | |
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306 |
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307 # Read in the metas |
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308 metas = getRawMetaList() |
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309 #print str(metas) |
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310 |
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311 # go through each one to check if it should be returned, based on the |
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312 # version numbers allowed. |
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313 for meta in metas: |
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314 |
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315 # split the line on whitespace |
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316 # obviously, your meta servers urls shouldn't contain whitespace. duh. |
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317 words = meta.split() |
| 90 | 318 |
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319 success = 0 # init success flag for version check |
| 90 | 320 |
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321 for version in versions: # run through each allowed version from caller |
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322 if version in words[1:]: # if the allowed version token was found |
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323 success += 1 # then increment the success indicator |
| 90 | 324 |
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325 if success: # if the meta entry is acceptable to the caller |
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326 meta_names.append(words[0]) # add the entry |
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327 if META_DEBUG: print "adding metaserver " + meta |
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328 |
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329 # at this point, we should have at least one name from the cache. If not ... |
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330 if not meta_names: |
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331 default_meta = getMetaServerBaseURL() # grab the meta from ini.xml |
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332 meta_names.append(default_meta) # add it to the return list |
| 90 | 333 # print "Warning!!\nNo valid metaservers cached." |
| 334 # print "Using meta from MetaServerBaseURL: " + default_meta + "\n" | |
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335 # if we have more than one and want a random one |
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336 elif pick_random: |
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337 if META_DEBUG: print "choosing random meta from: " + str(meta_names) |
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338 i = int(random.uniform(0,len(meta_names))) |
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339 #meta = meta_names[i] |
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340 meta_names = [meta_names[i]] |
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341 if META_DEBUG: print "using: " + str(meta_names) |
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342 else: |
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343 if META_DEBUG: print "using all metas: " + str(meta_names) |
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344 return meta_names |
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345 except Exception,e: |
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346 print e |
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347 #print "using default meta server URI: " + default_url |
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348 metas = [] |
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349 #metas.append(default_url) |
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350 return metas # return an empty list |
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351 else: # otherwise, use MetaServerBaseURL() |
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352 url = getMetaServerBaseURL() |
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353 meta_names.append(url) |
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354 return meta_names |
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355 |
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356 def getMetaServerBaseURL(): |
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357 # get meta server URL |
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358 url = "http://www.openrpg.com/openrpg_servers.php" |
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359 try: |
| 90 | 360 orpg.tools.validate.Validate().config_file("settings.xml","default_settings.xml") |
| 361 ini = open(orpg.dirpath.dir_struct["user"]+"settings.xml","r") | |
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362 txt = ini.read() |
| 66 | 363 tree = xml.parseXml(txt)._get_documentElement() |
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364 ini.close() |
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365 node_list = tree.getElementsByTagName("MetaServerBaseURL") |
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366 if node_list: |
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367 url = node_list[0].getAttribute("value") |
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368 |
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369 # allow tree to be collected |
| 90 | 370 try: |
| 371 tree.unlink() | |
| 372 except: | |
| 373 pass | |
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374 |
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375 except Exception,e: |
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376 print e |
| 90 | 377 # print "using meta server URI: " + url |
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378 return url |
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379 |
| 90 | 380 ####################################################################################### |
| 381 # Beginning of Class registerThread | |
| 382 # | |
| 383 # A Class to Manage Registration with the Meta2 | |
| 384 # Create an instance and call it's start() method | |
| 385 # if you want to be (and stay) registered. This class | |
| 386 # will take care of registering and re-registering as | |
| 387 # often as necessary to stay in the Meta list. | |
| 388 # | |
| 389 # You may call register() yourself if you wish to change your | |
| 390 # server's name. It will immediately update the Meta. There | |
| 391 # is no need to unregister first. | |
| 392 # | |
| 393 # Call unregister() when you no longer want to be registered. | |
| 394 # This will result in the registerThread dying after | |
| 395 # attempting to immediately remove itself from the Meta. | |
| 396 # | |
| 397 # If you need to become registered again after that, you | |
| 398 # must create a new instance of class registerThread. Don't | |
| 399 # just try to call register() on the old, dead thread class. | |
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400 |
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401 |
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402 class registerThread(Thread): |
| 90 | 403 # Originally, I wrote this as a sub-class of wxThread, but |
| 404 # A) I couldn't get it to import right | |
| 405 # B) I realized that I want this to be used in a server, | |
| 406 # which I don't want needing wxWindows to run! | |
| 407 # | |
| 408 # Because of this fact, there are some methods from wxThread | |
| 409 # that I implemented to minimize changes to the code I had | |
| 410 # just written, i.e. TestDeleteStatus() and Delete() | |
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411 |
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412 def __init__(self,name=None,realHostName=None,num_users = "Hmmm",MetaPath=None,port=6774,register_callback=None): |
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413 |
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414 Thread.__init__(self,name="registerThread") |
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415 self.rlock = RLock() # Re-entrant lock used to make this class thread safe |
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416 self.die_event = Event() # The main loop in run() will wait with timeout on this |
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417 if name: |
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418 self.name = name # Name that the server want's displayed on the Meta |
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419 else: |
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420 self.name = "Unnamed server" # But use this if for some crazy reason no name is |
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421 # passed to the constructor |
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422 self.num_users = num_users # the number of users currently on this server |
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423 self.realHostName = realHostName # Name to advertise for connection |
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424 self.id = "0" # id returned from Meta. Defaults to "0", which |
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425 # indicates a new registration. |
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426 self.cookie = "0" # cookie returned from Meta. Defaults to "0",which |
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427 # indicates a new registration. |
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428 self.interval = 0 # interval returned from Meta. Is how often to |
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429 # re-register, in minutes. |
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430 self.destroy = 0 # Used to flag that this thread should die |
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431 self.port = str(port) |
| 90 | 432 self.register_callback = register_callback # set a method to call to report result of register |
| 433 # This thread will communicate with one and only one | |
| 434 # Meta. If the Meta in ini.xml is changed after | |
| 435 # instantiation, then this instance must be | |
| 436 # unregistered and a new instance instantiated. | |
| 437 # | |
| 438 # Also, if MetaPath is specified, then use that. Makes | |
| 439 # it easier to have multiple registerThreads going to keep the server registered | |
| 440 # on multiple (compatible) Metas. | |
|
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441 |
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442 if MetaPath == None: |
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443 self.path = getMetaServerBaseURL() # Do this if no Meta specified |
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444 else: |
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445 self.path = MetaPath |
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446 |
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447 def getIdAndCookie(self): |
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448 return self.id, self.cookie |
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449 |
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450 def TestDeleteStatus(self): |
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451 try: |
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452 self.rlock.acquire() |
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453 return self.die_event.isSet() |
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454 finally: |
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455 self.rlock.release() |
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456 |
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457 def Delete(self): |
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458 try: |
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459 self.rlock.acquire() |
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460 self.die_event.set() |
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461 finally: |
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462 self.rlock.release() |
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463 |
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464 def run(self): |
| 90 | 465 # This method gets called by Thread implementation |
| 466 # when self.start() is called to begin the thread's | |
| 467 # execution | |
| 468 # | |
| 469 # We will basically enter a loop that continually | |
| 470 # re-registers this server and sleeps Interval | |
| 471 # minutes until the thread is ordered to die in place | |
|
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472 while(not self.TestDeleteStatus()): # Loop while until told to die |
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473 # Otherwise, call thread safe register(). |
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474 self.register(self.name, self.realHostName, self.num_users) |
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475 if META_DEBUG: print "Sent Registration Data" |
| 90 | 476 |
|
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477 # register() will end up setting the state variables |
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478 # for us, including self.interval. |
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479 try: |
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480 self.rlock.acquire() # Serialize access to this state information |
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481 |
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482 if self.interval >= 3: # If the number of minutes is one or greater |
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483 self.interval -= 1 # wake up with 30 seconds left to re-register |
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484 else: |
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485 self.interval = .5 # Otherwise, we probably experienced some kind |
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486 # of error from the Meta in register(). Sleep |
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487 # for 6 seconds and start from scratch. |
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488 |
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489 finally: # no matter what, release the lock |
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490 self.rlock.release() |
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491 # Wait interval minutes for a command to die |
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492 die_signal = self.die_event.wait(self.interval*60) |
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493 |
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494 # If we get past the while loop, it's because we've been asked to die, |
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495 # so just let run() end. Once this occurs, the thread is dead and |
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496 # calls to Thread.isAlive() return False. |
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497 |
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498 def unregister(self): |
| 90 | 499 # This method can (I hope) be called from both within the thread |
| 500 # and from other threads. It will attempt to unregister this | |
| 501 # server from the Meta database | |
| 502 # When this is either accomplished or has been tried hard enough | |
| 503 # (after which it just makes sense to let the Meta remove the | |
| 504 # entry itself when we don't re-register using this id), | |
| 505 # this method will either cause the thread to immediately die | |
| 506 # (if called from this thread's context) or set the Destroy flag | |
| 507 # (if called from the main thread), a positive test for which will cause | |
| 508 # the code in Entry() to exit() when the thread wakes up and | |
| 509 # checks TestDeleteStatus(). | |
| 510 # lock the critical section. The unlock will | |
| 511 # automatically occur at the end of the function in the finally clause | |
|
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512 try: |
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513 self.rlock.acquire() |
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514 if not self.isAlive(): # check to see if this thread is dead |
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515 return 1 # If so, return an error result |
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516 # Do the actual unregistering here |
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517 data = urllib.urlencode( {"server_data[id]":self.id, |
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518 "server_data[cookie]":self.cookie, |
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519 "server_data[version]":PROTOCOL_VERSION, |
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520 "act":"unregister"} ) |
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521 try: |
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522 xml_dom = get_server_dom(data=data, path=self.path) # this POSTS the request and returns the result |
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523 if xml_dom.hasAttribute("errmsg"): |
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524 print "Error durring unregistration: " + xml_dom.getAttribute("errmsg") |
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525 except: |
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526 if META_DEBUG: print "Problem talking to Meta. Will go ahead and die, letting Meta remove us." |
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527 # If there's an error, echo it to the console |
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528 |
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529 # No special handling is required. If the de-registration worked we're done. If |
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530 # not, then it's because we've already been removed or have a bad cookie. Either |
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531 # way, we can't do anything else, so die. |
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532 self.Delete() # This will cause the registerThread to die in register() |
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533 # prep xml_dom for garbage collection |
| 90 | 534 try: |
| 535 xml_dom.unlink() | |
| 536 except: | |
| 537 pass | |
|
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538 return 0 |
| 90 | 539 finally: |
| 540 self.rlock.release() | |
|
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541 |
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542 def register(self, name=None, realHostName=None, num_users=None): |
| 90 | 543 # Designed to handle the registration, both new and |
| 544 # repeated. | |
| 545 # | |
| 546 # It is intended to be called once every interval | |
| 547 # (or interval - delta) minutes. | |
|
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548 |
| 90 | 549 # lock the critical section. The unlock will |
| 550 # automatically occur at the end of the function in the finally clause | |
|
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551 try: |
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552 self.rlock.acquire() |
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553 if not self.isAlive(): # check to see if this thread is dead |
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554 return 1 # If so, return an error result |
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555 |
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556 # Set the server's attibutes, if specified. |
| 90 | 557 if name: |
| 558 self.name = name | |
| 559 if num_users != None: | |
| 560 self.num_users = num_users | |
| 561 if realHostName: | |
| 562 self.realHostName = realHostName | |
|
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563 # build POST data |
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564 if self.realHostName: |
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565 data = urllib.urlencode( {"server_data[id]":self.id, |
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566 "server_data[cookie]":self.cookie, |
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567 "server_data[name]":self.name, |
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568 "server_data[port]":self.port, |
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569 "server_data[version]":PROTOCOL_VERSION, |
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570 "server_data[num_users]":self.num_users, |
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571 "act":"register", |
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572 "server_data[address]": self.realHostName } ) |
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573 else: |
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574 if META_DEBUG: print "Letting meta server decide the hostname to list..." |
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575 data = urllib.urlencode( {"server_data[id]":self.id, |
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576 "server_data[cookie]":self.cookie, |
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577 "server_data[name]":self.name, |
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578 "server_data[port]":self.port, |
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579 "server_data[version]":PROTOCOL_VERSION, |
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580 "server_data[num_users]":self.num_users, |
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581 "act":"register"} ) |
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582 try: |
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583 xml_dom = get_server_dom(data=data,path=self.path) # this POSTS the request and returns the result |
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584 except: |
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585 if META_DEBUG: print "Problem talking to server. Setting interval for retry ..." |
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586 if META_DEBUG: print data |
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587 if META_DEBUG: print |
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588 self.interval = 0 |
| 90 | 589 # If we are in the registerThread thread, then setting interval to 0 |
| 590 # will end up causing a retry in about 6 seconds (see self.run()) | |
| 591 # If we are in the main thread, then setting interval to 0 will do one | |
| 592 # of two things: | |
| 593 # 1) Do the same as if we were in the registerThread | |
| 594 # 2) Cause the next, normally scheduled register() call to use the values | |
| 595 # provided in this call. | |
| 596 # | |
| 597 # Which case occurs depends on where the registerThread thread is when | |
| 598 # the main thread calls register(). | |
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599 return 0 # indicates that it was okay to call, not that no errors occurred |
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600 # If there is a DOM returned .... |
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601 if xml_dom: |
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602 # If there's an error, echo it to the console |
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603 if xml_dom.hasAttribute("errmsg"): |
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604 print "Error durring registration: " + xml_dom.getAttribute("errmsg") |
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605 if META_DEBUG: print data |
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606 if META_DEBUG: print |
| 90 | 607 # No special handling is required. If the registration worked, id, cookie, and interval |
| 608 # can be stored and used for the next time. | |
| 609 # If an error occurred, then the Meta will delete us and we need to re-register as | |
| 610 # a new server. The way to indicate this is with a "0" id and "0" cookie sent to | |
| 611 # the server during the next registration. Since that's what the server returns to | |
| 612 # us on an error anyway, we just store them and the next registration will | |
| 613 # automatically be set up as a new one. | |
| 614 # | |
| 615 # Unless the server calls register() itself in the meantime. Of course, that's okay | |
| 616 # too, because a success on THAT register() call will set up the next one to use | |
| 617 # the issued id and cookie. | |
| 618 # | |
| 619 # The interval is stored unconditionally for similar reasons. If there's an error, | |
| 620 # the interval will be less than 1, and the main thread's while loop will reset it | |
| 621 # to 6 seconds for the next retry. | |
| 622 # Is it wrong to have a method where there's more comments than code? :) | |
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623 try: |
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624 self.interval = int(xml_dom.getAttribute("interval")) |
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625 self.id = xml_dom.getAttribute("id") |
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626 self.cookie = xml_dom.getAttribute("cookie") |
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627 if not xml_dom.hasAttribute("errmsg"): |
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628 updateMetaCache(xml_dom) |
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629 except: |
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630 if META_DEBUG: print |
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631 if META_DEBUG: print "OOPS! Is the Meta okay? It should be returning an id, cookie, and interval." |
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632 if META_DEBUG: print "Check to see what it really returned.\n" |
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633 # Let xml_dom get garbage collected |
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634 try: |
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635 xml_dom.unlink() |
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636 except: |
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637 pass |
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638 else: # else if no DOM is returned from get_server_dom() |
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639 print "Error - no DOM constructed from Meta message!" |
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640 return 0 # Let caller know it was okay to call us |
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641 finally: |
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642 self.rlock.release() |
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643 # End of class registerThread |
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644 ################################################################################ |