1 | <?php
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2 |
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3 | // security - hide paths
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4 | if (!defined('ADODB_DIR')) die();
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5 |
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6 | global $ADODB_INCLUDED_CSV;
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7 | $ADODB_INCLUDED_CSV = 1;
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8 |
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9 | /*
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10 |
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11 | V4.94 23 Jan 2007 (c) 2000-2007 John Lim (jlim#natsoft.com.my). All rights reserved.
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12 | Released under both BSD license and Lesser GPL library license.
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13 | Whenever there is any discrepancy between the two licenses,
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14 | the BSD license will take precedence. See License.txt.
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15 | Set tabs to 4 for best viewing.
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16 |
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17 | Latest version is available at http://adodb.sourceforge.net
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18 |
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19 | Library for CSV serialization. This is used by the csv/proxy driver and is the
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20 | CacheExecute() serialization format.
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21 |
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22 | ==== NOTE ====
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23 | Format documented at http://php.weblogs.com/ADODB_CSV
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24 | ==============
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25 | */
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26 |
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27 | /**
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28 | * convert a recordset into special format
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29 | *
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30 | * @param rs the recordset
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31 | *
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32 | * @return the CSV formated data
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33 | */
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34 | function _rs2serialize(&$rs,$conn=false,$sql='')
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35 | {
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36 | $max = ($rs) ? $rs->FieldCount() : 0;
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37 |
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38 | if ($sql) $sql = urlencode($sql);
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39 | // metadata setup
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40 |
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41 | if ($max <= 0 || $rs->dataProvider == 'empty') { // is insert/update/delete
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42 | if (is_object($conn)) {
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43 | $sql .= ','.$conn->Affected_Rows();
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44 | $sql .= ','.$conn->Insert_ID();
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45 | } else
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46 | $sql .= ',,';
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47 |
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48 | $text = "====-1,0,$sql\n";
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49 | return $text;
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50 | }
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51 | $tt = ($rs->timeCreated) ? $rs->timeCreated : time();
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52 |
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53 | ## changed format from ====0 to ====1
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54 | $line = "====1,$tt,$sql\n";
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55 |
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56 | if ($rs->databaseType == 'array') {
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57 | $rows =& $rs->_array;
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58 | } else {
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59 | $rows = array();
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60 | while (!$rs->EOF) {
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61 | $rows[] = $rs->fields;
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62 | $rs->MoveNext();
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63 | }
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64 | }
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65 |
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66 | for($i=0; $i < $max; $i++) {
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67 | $o =& $rs->FetchField($i);
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68 | $flds[] = $o;
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69 | }
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70 |
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71 | $savefetch = isset($rs->adodbFetchMode) ? $rs->adodbFetchMode : $rs->fetchMode;
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72 | $class = $rs->connection->arrayClass;
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73 | $rs2 = new $class();
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74 | $rs2->sql = $rs->sql;
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75 | $rs2->oldProvider = $rs->dataProvider;
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76 | $rs2->InitArrayFields($rows,$flds);
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77 | $rs2->fetchMode = $savefetch;
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78 | return $line.serialize($rs2);
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79 | }
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80 |
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81 |
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82 | /**
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83 | * Open CSV file and convert it into Data.
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84 | *
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85 | * @param url file/ftp/http url
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86 | * @param err returns the error message
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87 | * @param timeout dispose if recordset has been alive for $timeout secs
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88 | *
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89 | * @return recordset, or false if error occured. If no
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90 | * error occurred in sql INSERT/UPDATE/DELETE,
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91 | * empty recordset is returned
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92 | */
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93 | function &csv2rs($url,&$err,$timeout=0, $rsclass='ADORecordSet_array')
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94 | {
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95 | $false = false;
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96 | $err = false;
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97 | $fp = @fopen($url,'rb');
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98 | if (!$fp) {
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99 | $err = $url.' file/URL not found';
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100 | return $false;
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101 | }
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102 | @flock($fp, LOCK_SH);
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103 | $arr = array();
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104 | $ttl = 0;
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105 |
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106 | if ($meta = fgetcsv($fp, 32000, ",")) {
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107 | // check if error message
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108 | if (strncmp($meta[0],'****',4) === 0) {
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109 | $err = trim(substr($meta[0],4,1024));
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110 | fclose($fp);
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111 | return $false;
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112 | }
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113 | // check for meta data
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114 | // $meta[0] is -1 means return an empty recordset
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115 | // $meta[1] contains a time
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116 |
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117 | if (strncmp($meta[0], '====',4) === 0) {
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118 |
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119 | if ($meta[0] == "====-1") {
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120 | if (sizeof($meta) < 5) {
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121 | $err = "Corrupt first line for format -1";
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122 | fclose($fp);
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123 | return $false;
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124 | }
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125 | fclose($fp);
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126 |
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127 | if ($timeout > 0) {
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128 | $err = " Illegal Timeout $timeout ";
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129 | return $false;
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130 | }
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131 |
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132 | $rs = new $rsclass($val=true);
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133 | $rs->fields = array();
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134 | $rs->timeCreated = $meta[1];
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135 | $rs->EOF = true;
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136 | $rs->_numOfFields = 0;
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137 | $rs->sql = urldecode($meta[2]);
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138 | $rs->affectedrows = (integer)$meta[3];
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139 | $rs->insertid = $meta[4];
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140 | return $rs;
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141 | }
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142 | # Under high volume loads, we want only 1 thread/process to _write_file
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143 | # so that we don't have 50 processes queueing to write the same data.
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144 | # We use probabilistic timeout, ahead of time.
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145 | #
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146 | # -4 sec before timeout, give processes 1/32 chance of timing out
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147 | # -2 sec before timeout, give processes 1/16 chance of timing out
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148 | # -1 sec after timeout give processes 1/4 chance of timing out
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149 | # +0 sec after timeout, give processes 100% chance of timing out
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150 | if (sizeof($meta) > 1) {
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151 | if($timeout >0){
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152 | $tdiff = (integer)( $meta[1]+$timeout - time());
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153 | if ($tdiff <= 2) {
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154 | switch($tdiff) {
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155 | case 4:
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156 | case 3:
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157 | if ((rand() & 31) == 0) {
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158 | fclose($fp);
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159 | $err = "Timeout 3";
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160 | return $false;
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161 | }
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162 | break;
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163 | case 2:
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164 | if ((rand() & 15) == 0) {
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165 | fclose($fp);
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166 | $err = "Timeout 2";
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167 | return $false;
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168 | }
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169 | break;
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170 | case 1:
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171 | if ((rand() & 3) == 0) {
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172 | fclose($fp);
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173 | $err = "Timeout 1";
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174 | return $false;
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175 | }
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176 | break;
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177 | default:
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178 | fclose($fp);
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179 | $err = "Timeout 0";
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180 | return $false;
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181 | } // switch
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182 |
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183 | } // if check flush cache
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184 | }// (timeout>0)
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185 | $ttl = $meta[1];
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186 | }
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187 | //================================================
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188 | // new cache format - use serialize extensively...
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189 | if ($meta[0] === '====1') {
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190 | // slurp in the data
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191 | $MAXSIZE = 128000;
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192 |
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193 | $text = fread($fp,$MAXSIZE);
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194 | if (strlen($text)) {
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195 | while ($txt = fread($fp,$MAXSIZE)) {
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196 | $text .= $txt;
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197 | }
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198 | }
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199 | fclose($fp);
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200 | $rs = unserialize($text);
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201 | if (is_object($rs)) $rs->timeCreated = $ttl;
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202 | else {
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203 | $err = "Unable to unserialize recordset";
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204 | //echo htmlspecialchars($text),' !--END--!<p>';
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205 | }
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206 | return $rs;
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207 | }
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208 |
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209 | $meta = false;
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210 | $meta = fgetcsv($fp, 32000, ",");
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211 | if (!$meta) {
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212 | fclose($fp);
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213 | $err = "Unexpected EOF 1";
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214 | return $false;
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215 | }
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216 | }
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217 |
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218 | // Get Column definitions
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219 | $flds = array();
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220 | foreach($meta as $o) {
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221 | $o2 = explode(':',$o);
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222 | if (sizeof($o2)!=3) {
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223 | $arr[] = $meta;
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224 | $flds = false;
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225 | break;
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226 | }
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227 | $fld = new ADOFieldObject();
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228 | $fld->name = urldecode($o2[0]);
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229 | $fld->type = $o2[1];
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230 | $fld->max_length = $o2[2];
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231 | $flds[] = $fld;
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232 | }
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233 | } else {
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234 | fclose($fp);
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235 | $err = "Recordset had unexpected EOF 2";
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236 | return $false;
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237 | }
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238 |
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239 | // slurp in the data
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240 | $MAXSIZE = 128000;
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241 |
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242 | $text = '';
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243 | while ($txt = fread($fp,$MAXSIZE)) {
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244 | $text .= $txt;
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245 | }
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246 |
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247 | fclose($fp);
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248 | @$arr = unserialize($text);
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249 | //var_dump($arr);
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250 | if (!is_array($arr)) {
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251 | $err = "Recordset had unexpected EOF (in serialized recordset)";
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252 | if (get_magic_quotes_runtime()) $err .= ". Magic Quotes Runtime should be disabled!";
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253 | return $false;
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254 | }
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255 | $rs = new $rsclass();
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256 | $rs->timeCreated = $ttl;
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257 | $rs->InitArrayFields($arr,$flds);
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258 | return $rs;
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259 | }
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260 |
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261 |
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262 | /**
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263 | * Save a file $filename and its $contents (normally for caching) with file locking
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264 | */
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265 | function adodb_write_file($filename, $contents,$debug=false)
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266 | {
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267 | # http://www.php.net/bugs.php?id=9203 Bug that flock fails on Windows
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268 | # So to simulate locking, we assume that rename is an atomic operation.
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269 | # First we delete $filename, then we create a $tempfile write to it and
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270 | # rename to the desired $filename. If the rename works, then we successfully
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271 | # modified the file exclusively.
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272 | # What a stupid need - having to simulate locking.
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273 | # Risks:
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274 | # 1. $tempfile name is not unique -- very very low
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275 | # 2. unlink($filename) fails -- ok, rename will fail
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276 | # 3. adodb reads stale file because unlink fails -- ok, $rs timeout occurs
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277 | # 4. another process creates $filename between unlink() and rename() -- ok, rename() fails and cache updated
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278 | if (strncmp(PHP_OS,'WIN',3) === 0) {
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279 | // skip the decimal place
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280 | $mtime = substr(str_replace(' ','_',microtime()),2);
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281 | // getmypid() actually returns 0 on Win98 - never mind!
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282 | $tmpname = $filename.uniqid($mtime).getmypid();
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283 | if (!($fd = @fopen($tmpname,'a'))) return false;
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284 | $ok = ftruncate($fd,0);
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285 | if (!fwrite($fd,$contents)) $ok = false;
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286 | fclose($fd);
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287 | chmod($tmpname,0644);
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288 | // the tricky moment
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289 | @unlink($filename);
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290 | if (!@rename($tmpname,$filename)) {
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291 | unlink($tmpname);
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292 | $ok = false;
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293 | }
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294 | if (!$ok) {
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295 | if ($debug) ADOConnection::outp( " Rename $tmpname ".($ok? 'ok' : 'failed'));
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296 | }
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297 | return $ok;
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298 | }
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299 | if (!($fd = @fopen($filename, 'a'))) return false;
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300 | if (flock($fd, LOCK_EX) && ftruncate($fd, 0)) {
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301 | $ok = fwrite( $fd, $contents );
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302 | fclose($fd);
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303 | chmod($filename,0644);
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304 | }else {
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305 | fclose($fd);
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306 | if ($debug)ADOConnection::outp( " Failed acquiring lock for $filename<br>\n");
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307 | $ok = false;
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308 | }
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309 |
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310 | return $ok;
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311 | }
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312 | ?> |
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