annotate server.php @ 7:01dc7eeaf5df

Added some more checks to article data, added some commands, added 'dot stuffing' for block transfers
author Ivo Smits <Ivo@UCIS.nl>
date Tue, 12 Apr 2011 14:10:41 +0200
parents 5d62af5270dd
children 005339a1b2ce
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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1 #!/usr/bin/php
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2 <?php
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3 chdir(__DIR__);
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4 require_once './common.php';
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5
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6 $logfile = fopen('./server.log', 'w');
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7 $currentgroup = NULL;
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8 $currentarticle = NULL;
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9
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10 function exception_handler($exception) {
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11 nntp_writeline(STDOUT, '');
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12 nntp_writeline(STDOUT, '590 Exception: '.$exception->getMessage());
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13 die();
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14 }
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15 function error_handler($errno, $errstr, $errfile, $errline) {
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16 nntp_writeline(STDOUT, '');
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17 nntp_writeline(STDOUT, '590 Error in file '.$errfile.' line '.$errline.' error '.$errno.' '.$errstr);
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18 die();
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19 }
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20 set_exception_handler('exception_handler');
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21 set_error_handler("error_handler");
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22
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23 nntp_writeline(STDOUT, '200 pNewss ready');
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24 while (TRUE) {
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25 $line = nntp_readline(STDIN);
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26 if ($line === FALSE || $line === NULL) break;
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27 $cmd = strtoupper(strtok($line, " \t"));
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28 switch ($cmd) {
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29 case 'CAPABILITIES':
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30 nntp_writeline(STDOUT, '101 Capability list:');
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31 nntp_writeline_data(STDOUT, 'VERSION 2');
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32 nntp_writeline_data(STDOUT, 'IMPLEMENTATION pNewss [http://wiki.ucis.nl/pNewss]');
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33 nntp_writeline_data(STDOUT, 'POST');
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34 nntp_writeline_data(STDOUT, 'READER');
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35 nntp_writeline_data(STDOUT, 'IHAVE');
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36 nntp_writeline_data(STDOUT, 'LIST ACTIVE');
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37 nntp_writeline(STDOUT, '.');
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38 //HDR, LIST, OVER, STARTTLS, STREAMING,
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39 break;
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40 case 'DATE':
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41 nntp_writeline(STDOUT, '111 '.gmdate('YmdHis'));
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42 break;
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43 case 'HELP':
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44 nntp_writeline(STDOUT, '100 Help text follows:');
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45 nntp_writeline_data(STDOUT, 'Supported commands: CAPABILITIES,DATE,HELP,LIST,GROUP,LISTGROUP,STAT,HEAD,BODY,ARTICLE,LAST,NEXT,POST,IHAVE,QUIT');
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46 nntp_writeline(STDOUT, '.');
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47 break;
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48 case 'LIST':
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49 nntp_writeline(STDOUT, '215 list of groups follows');
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50 foreach ($db->evalAllAssoc('SELECT * FROM `groups`') as $group) {
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51 $groupmessages = $db->evalRow('SELECT MIN(`number`), MAX(`number`) FROM `groupmessages` WHERE `group` = ?', $group['id']);
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52 nntp_writeline_data(STDOUT, $group['name'].' '.intval($groupmessages[1]).' '.intval($groupmessages[0]).' n');
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53 }
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54 nntp_writeline(STDOUT, '.');
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55 break;
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56 case 'GROUP':
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57 case 'LISTGROUP':
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58 $groupname = strtok(" \t");
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59 if ($groupname === FALSE) {
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60 $group = $currentgroup;
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61 } else {
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62 $group = $db->evalRowAssoc('SELECT * FROM `groups` WHERE `name` = ?', $groupname);
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63 }
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64 if ($group === FALSE) {
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65 nntp_writeline(STDOUT, '411 No such group '.$groupname);
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66 } else {
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67 $currentgroup = $group;
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68 $groupmessages = $db->evalRow('SELECT MIN(`number`), MAX(`number`), COUNT(`number`) FROM `groupmessages` WHERE `group` = ?', $group['id']);
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69 nntp_writeline(STDOUT, '211 '.intval($groupmessages[2]).' '.intval($groupmessages[0]).' '.intval($groupmessages[1]).' '.$group['name']);
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70 if ($groupmessages[0] === NULL) {
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71 $currentarticle = NULL;
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72 } else {
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73 $currentarticle = $db->evalRowAssoc('SELECT * FROM `groupmessages` WHERE `group` = ? AND `number` = ?', array($group['id'], $groupmessages[0]));
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74 if ($currentarticle === FALSE) $currentarticle = NULL;
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75 }
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76 if ($cmd == 'LISTGROUP') {
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77 $range = strtok(" \t");
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78 if ($range !== FALSE) {
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79 $parts = explode('-', $range);
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80 if (count($parts) == 1 || !strlen($parts[1])) {
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81 $query = 'SELECT `number` FROM `groupmessages` WHERE `group` = ? AND `number` >= ?';
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82 $queryargs = array($group['id'], $parts[0]);
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83 } else {
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84 $query = 'SELECT `number` FROM `groupmessages` WHERE `group` = ? AND `number` BETWEEN ? AND ?';
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85 $queryargs = array($group['id'], $parts[0], $parts[1]);
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86 }
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87 } else {
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88 $query = 'SELECT `number` FROM `groupmessages` WHERE `group` = ?';
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89 $queryargs = array($group['id']);
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90 }
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91 foreach ($db->evalColumn($query, $queryargs) as $number) nntp_writeline_data(STDOUT, $number);
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92 nntp_writeline(STDOUT, '.');
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93 }
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94 }
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95 break;
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96 case 'STAT':
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97 case 'HEAD':
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98 case 'BODY':
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99 case 'ARTICLE':
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100 $article = nntp_get_article(strtok(" \t"));
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101 if ($article === NULL) break;
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102 switch ($cmd) {
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103 case 'ARTICLE': nntp_writeline(STDOUT, '220 '.$article['messagenumber'].' <'.$article['messageid'].'> article'); break;
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104 case 'HEAD': nntp_writeline(STDOUT, '221 '.$article['messagenumber'].' <'.$article['messageid'].'> head'); break;
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105 case 'BODY': nntp_writeline(STDOUT, '222 '.$article['messagenumber'].' <'.$article['messageid'].'> body'); break;
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106 case 'STAT': nntp_writeline(STDOUT, '223 '.$article['messagenumber'].' <'.$article['messageid'].'> stat'); break;
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107 default: throw new Exception('Internal error');
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108 }
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109 if ($cmd == 'HEAD' || $cmd == 'ARTICLE') foreach (explode("\r\n", $article['header']) as $line) nntp_writeline_data(STDOUT, $line);
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110 if ($cmd == 'ARTICLE') nntp_writeline(STDOUT, '');
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111 if ($cmd == 'BODY' || $cmd == 'ARTICLE') foreach (explode("\r\n", $article['body']) as $line) nntp_writeline_data(STDOUT, $line);
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112 if ($cmd != 'STAT') nntp_writeline(STDOUT, '.');
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113 break;
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114 case 'LAST':
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115 case 'NEXT':
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116 if ($currentarticle === NULL) {
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117 nntp_writeline(STDOUT, '420 no current article has been selected');
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118 break;
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119 }
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120 switch ($cmd) {
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121 case 'LAST': $query = 'SELECT * FROM `groupmessages` WHERE `group` = ? AND `number` < ? ORDER BY `number` DESC LIMIT 1'; break;
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122 case 'NEXT': $query = 'SELECT * FROM `groupmessages` WHERE `group` = ? AND `number` > ? ORDER BY `number` ASC LIMIT 1'; break;
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123 default: throw new Exception('Internal error');
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124 }
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125 $article = $db->evalRowAssoc($query, array($currentarticle['group'], $currentarticle['number']));
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126 if ($article === FALSE) {
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127 nntp_writeline(STDOUT, '422 no previous article in this group');
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128 } else {
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129 $articlea = $db->evalRowAssoc('SELECT * FROM `messages` WHERE `id` = ?', $article['message']);
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130 if ($articlea === FALSE) {
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131 nntp_writeline(STDOUT, '430 no such article found');
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132 return NULL;
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133 }
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134 $currentarticle = $article;
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135 nntp_writeline(STDOUT, '223 '.$article['number'].' <'.$articlea['messageid'].'> ok');
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136 }
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137 break;
2
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diff changeset
138 case 'POST':
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139 nntp_writeline(STDOUT, '340 Ok, recommended message-ID <'.md5(time().rand()).'@pNews.Core.UCIS.nl>');
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140 $lines = nntp_readlines(STDIN);
3
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diff changeset
141 try {
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142 $messageid = nntp_article_store($lines);
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143 nntp_writeline(STDOUT, '240 Article received <'.$messageid.'>');
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144 } catch (Exception $ex) {
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145 nntp_writeline(STDOUT, '441 '.$ex->getMessage());
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146 }
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147 break;
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diff changeset
148 case 'IHAVE':
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149 $messageid = strtok(" \t");
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150 if ($messageid === FALSE || strlen($messageid) <= 2 || $messageid[0] != '<' || $messageid[strlen($messageid)-1] == '>') {
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151 nntp_writeline(STDOUT, '435 Argument error');
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152 break;
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153 }
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154 $messageid = substr($messageid, 1, -1);
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155 if ($db->evalRow('SELECT `id` FROM `messages` WHERE `messageid` = ?', $messageid) !== FALSE) {
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156 nntp_writeline(STDOUT, '435 Duplicate');
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157 break;
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diff changeset
158 }
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159 nntp_writeline(STDOUT, '335 Send article to be transferred');
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160 $lines = nntp_readlines(STDIN);
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diff changeset
161 try {
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162 $messageid = nntp_article_store($lines);
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163 nntp_writeline(STDOUT, '235 Article received <'.$messageid.'>');
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164 } catch (Exception $ex) {
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165 nntp_writeline(STDOUT, '437 '.$ex->getMessage());
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diff changeset
166 }
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diff changeset
167 break;
0
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168 case 'QUIT':
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169 nntp_writeline(STDOUT, '205 Bye.');
0
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170 return;
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171 default:
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172 nntp_writeline(STDOUT, '500 Command not understood');
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173 break;
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174 }
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175 }
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176
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177 function nntp_get_article($article) {
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178 global $currentgroup, $currentarticle, $db;
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179 if ($article === FALSE) {
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180 if ($currentarticle === NULL) {
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181 nntp_writeline(STDOUT, '420 no current article has been selected');
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182 return NULL;
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183 }
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184 $messagenumber = $currentarticle['number'];
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185 $article = $db->evalRowAssoc('SELECT * FROM `messages` WHERE `id` = ?', $currentarticle['message']);
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186 if ($article === FALSE) {
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187 nntp_writeline(STDOUT, '430 no such article found');
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188 return NULL;
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189 }
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190 } elseif (strlen($article) > 2 && $article[0] == '<' && $article[strlen($article)-1] == '>') {
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191 $messagenumber = 0;
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192 $article = substr($article, 1, -1);
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193 $article = $db->evalRowAssoc('SELECT * FROM `messages` WHERE `messageid` = ?', $article);
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194 if ($article === FALSE) {
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195 nntp_writeline(STDOUT, '430 no such article found');
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196 return NULL;
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197 }
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198 } elseif (is_numeric($article)) {
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199 if ($currentgroup === NULL) {
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200 nntp_writeline(STDOUT, '412 no newsgroup has been selected');
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201 return NULL;
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202 }
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203 $article = $db->evalRowAssoc('SELECT * FROM `groupmessages` WHERE `group` = ? AND `number` = ?', array($currentgroup['id'], $article));
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204 if ($article === FALSE) {
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205 nntp_writeline(STDOUT, '423 no such article number in this group');
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206 return NULL;
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diff changeset
207 }
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208 $currentarticle = $article;
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diff changeset
209 $messagenumber = $article['number'];
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diff changeset
210 $article = $db->evalRowAssoc('SELECT * FROM `messages` WHERE `id` = ?', $article['message']);
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211 if ($article === FALSE) {
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212 nntp_writeline(STDOUT, '430 no such article found');
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213 return NULL;
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diff changeset
214 }
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diff changeset
215 } else {
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216 nntp_writeline(STDOUT, '500 Error in arguments');
d7ab68b71c74 Initial commit
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diff changeset
217 }
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diff changeset
218 $article['messagenumber'] = $messagenumber;
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diff changeset
219 return $article;
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diff changeset
220 }
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diff changeset
221
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222 function writelog($line) {
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223 global $logfile;
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224 fwrite($logfile, $line."\n");
d7ab68b71c74 Initial commit
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diff changeset
225 }