[763] | 1 | #LyX 1.1 created this file. For more info see http://www.lyx.org/ |
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| 2 | \lyxformat 218 |
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| 3 | \textclass linuxdoc |
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| 4 | \language english |
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| 5 | \inputencoding latin1 |
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| 6 | \fontscheme default |
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| 7 | \graphics default |
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| 8 | \paperfontsize default |
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| 9 | \spacing single |
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| 10 | \papersize Default |
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| 11 | \paperpackage a4 |
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| 12 | \use_geometry 0 |
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| 13 | \use_amsmath 0 |
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| 14 | \paperorientation portrait |
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| 15 | \secnumdepth 5 |
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| 16 | \tocdepth 5 |
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| 17 | \paragraph_separation indent |
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| 18 | \defskip medskip |
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| 19 | \quotes_language english |
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| 20 | \quotes_times 2 |
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| 21 | \papercolumns 1 |
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| 22 | \papersides 1 |
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| 23 | \paperpagestyle default |
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| 24 | |
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| 25 | \layout Title |
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| 26 | \added_space_top vfill \added_space_bottom vfill |
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| 27 | phpgwapi - VFS Class |
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| 28 | \layout Author |
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| 29 | |
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| 30 | Jason Wies |
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| 31 | \layout Date |
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| 32 | |
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| 33 | June 2001, February 2002 |
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| 34 | \layout Abstract |
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| 35 | |
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| 36 | The VFS, or Virtual File System, handles all file system activity for phpGroupWa |
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| 37 | re. |
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| 38 | \layout Section |
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| 39 | |
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| 40 | Introduction and Purpose |
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| 41 | \begin_inset LatexCommand \label{sec:introduction} |
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| 42 | |
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| 43 | \end_inset |
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| 44 | |
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| 45 | |
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| 46 | \layout Standard |
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| 47 | |
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| 48 | The latest version of the VFS for eGoupWare combines actual file system |
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| 49 | manipulation with fully integrated database support. |
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| 50 | It features nearly transparent handling of files and directories, as well |
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| 51 | as files inside and outside the virtual root. |
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| 52 | This document is intended to provide API and application developers with |
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| 53 | a guide to incorporating the VFS into their work. |
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| 54 | \layout Section |
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| 55 | |
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| 56 | Basics |
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| 57 | \begin_inset LatexCommand \label{sec:basics} |
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| 58 | |
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| 59 | \end_inset |
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| 60 | |
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| 61 | |
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| 62 | \layout Subsection |
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| 63 | |
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| 64 | Prerequisites |
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| 65 | \begin_inset LatexCommand \label{sec:prerequisites} |
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| 66 | |
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| 67 | \end_inset |
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| 68 | |
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| 69 | |
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| 70 | \layout Standard |
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| 71 | |
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| 72 | You must explicitly enable the VFS class. |
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| 73 | To do this, set 'enable_vfs_class' to True in $GLOBALS['phpgw_info']['flags']. |
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| 74 | An example: |
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| 75 | \layout Verbatim |
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| 76 | |
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| 77 | $GLOBALS['phpgw_info']['flags'] = array( |
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| 78 | \layout Verbatim |
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| 79 | |
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| 80 | 'currentapp' => 'phpwebhosting', |
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| 81 | \layout Verbatim |
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| 82 | |
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| 83 | 'noheader' => False, |
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| 84 | \layout Verbatim |
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| 85 | |
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| 86 | 'noappheader' => False, |
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| 87 | \layout Verbatim |
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| 88 | |
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| 89 | 'enable_vfs_class' => True, |
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| 90 | \layout Verbatim |
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| 91 | |
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| 92 | 'enable_browser_class' => True |
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| 93 | \layout Verbatim |
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| 94 | |
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| 95 | ); |
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| 96 | \layout Subsection |
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| 97 | |
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| 98 | Concepts |
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| 99 | \begin_inset LatexCommand \label{sec:concepts} |
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| 100 | |
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| 101 | \end_inset |
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| 102 | |
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| 103 | |
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| 104 | \layout Standard |
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| 105 | |
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| 106 | The VFS in located in phpgwapi/inc/class.vfs_sql.inc.php. |
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| 107 | You can look over it, but I don't suggest trying to understand how it works. |
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| 108 | It isn't necessary to know its internals to use it, but you may find the |
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| 109 | inline comments helpful. |
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| 110 | The basic things to keep in mind: |
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| 111 | \layout Itemize |
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| 112 | |
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| 113 | Files and directories are synonymous in almost all cases |
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| 114 | \layout Verbatim |
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| 115 | |
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| 116 | $GLOBALS['phpgw']->vfs->mv (array( |
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| 117 | \layout Verbatim |
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| 118 | |
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| 119 | 'from' => 'file1', |
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| 120 | \layout Verbatim |
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| 121 | |
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| 122 | 'to' => 'dir/file2' |
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| 123 | \layout Verbatim |
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| 124 | |
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| 125 | )); |
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| 126 | \layout Verbatim |
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| 127 | |
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| 128 | \layout Verbatim |
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| 129 | |
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| 130 | $GLOBALS['phpgw']->vfs->mv (array( |
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| 131 | \layout Verbatim |
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| 132 | |
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| 133 | 'from' => 'dir1', |
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| 134 | \layout Verbatim |
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| 135 | |
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| 136 | 'to' => 'dir/dir1' |
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| 137 | \layout Verbatim |
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| 138 | |
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| 139 | )); |
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| 140 | \layout Verbatim |
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| 141 | |
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| 142 | \layout Verbatim |
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| 143 | |
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| 144 | $GLOBALS['phpgw']->vfs->rm (array( |
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| 145 | \layout Verbatim |
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| 146 | |
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| 147 | 'string' => 'file' |
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| 148 | \layout Verbatim |
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| 149 | |
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| 150 | )); |
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| 151 | \layout Verbatim |
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| 152 | |
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| 153 | \layout Verbatim |
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| 154 | |
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| 155 | $GLOBALS['phpgw']->vfs->rm (array( |
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| 156 | \layout Verbatim |
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| 157 | |
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| 158 | 'string' => 'dir' |
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| 159 | \layout Verbatim |
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| 160 | |
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| 161 | )); |
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| 162 | \layout Standard |
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| 163 | |
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| 164 | All work as you would except them to. |
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| 165 | The major exception is: |
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| 166 | \layout Verbatim |
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| 167 | |
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| 168 | $GLOBALS['phpgw']->vfs->touch (array( |
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| 169 | \layout Verbatim |
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| 170 | |
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| 171 | 'string' => 'file' |
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| 172 | \layout Verbatim |
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| 173 | |
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| 174 | )); |
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| 175 | \layout Standard |
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| 176 | |
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| 177 | vs. |
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| 178 | \layout Verbatim |
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| 179 | |
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| 180 | $GLOBALS['phpgw']->vfs->mkdir (array( |
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| 181 | \layout Verbatim |
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| 182 | |
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| 183 | 'string' => 'dir' |
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| 184 | \layout Verbatim |
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| 185 | |
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| 186 | )); |
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| 187 | \layout Verbatim |
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| 188 | |
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| 189 | \layout Itemize |
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| 190 | |
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| 191 | Users and groups are synonymous |
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| 192 | \layout Standard |
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| 193 | |
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| 194 | As far as the actual paths are concerned, users and groups are the same. |
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| 195 | /home/username works the same as /home/groupname. |
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| 196 | \layout Itemize |
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| 197 | |
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| 198 | You should never have to know the real paths of files |
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| 199 | \layout Standard |
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| 200 | |
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| 201 | One of the VFS's responsibilities is to translate paths for you. |
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| 202 | While you certainly |
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| 203 | \emph on |
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| 204 | can |
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| 205 | \emph default |
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| 206 | operate using full paths, it is much simpler to use the virtual paths. |
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| 207 | For example, instead of using: |
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| 208 | \layout Verbatim |
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| 209 | |
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| 210 | $GLOBALS['phpgw']->vfs->cp (array( |
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| 211 | \layout Verbatim |
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| 212 | |
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| 213 | 'from' => '/var/www/egroupware/files/home/user/file1', |
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| 214 | \layout Verbatim |
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| 215 | |
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| 216 | 'to' => '/var/www/egroupware/files/home/user/file2', |
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| 217 | \layout Verbatim |
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| 218 | |
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| 219 | 'relatives' => array( |
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| 220 | \layout Verbatim |
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| 221 | |
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| 222 | RELATIVE_NONE|VFS_REAL, |
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| 223 | \layout Verbatim |
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| 224 | |
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| 225 | RELATIVE_NONE|VFS_REAL |
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| 226 | \layout Verbatim |
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| 227 | |
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| 228 | ) |
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| 229 | \layout Verbatim |
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| 230 | |
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| 231 | )); |
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| 232 | \layout Standard |
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| 233 | |
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| 234 | you might use |
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| 235 | \layout Verbatim |
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| 236 | |
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| 237 | $GLOBALS['phpgw']->vfs->cp (array( |
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| 238 | \layout Verbatim |
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| 239 | |
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| 240 | 'from' => '/home/user/file1', |
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| 241 | \layout Verbatim |
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| 242 | |
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| 243 | 'to' => '/home/user/file2', |
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| 244 | \layout Verbatim |
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| 245 | |
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| 246 | 'relatives' => array( |
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| 247 | \layout Verbatim |
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| 248 | |
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| 249 | RELATIVE_NONE, |
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| 250 | \layout Verbatim |
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| 251 | |
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| 252 | RELATIVE_NONE |
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| 253 | \layout Verbatim |
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| 254 | |
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| 255 | ) |
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| 256 | \layout Verbatim |
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| 257 | |
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| 258 | )); |
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| 259 | \layout Standard |
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| 260 | |
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| 261 | (We'll get to the RELATIVE's in a minute.) |
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| 262 | \layout Standard |
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| 263 | |
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| 264 | Site administrators should be able to move their files dir around on their |
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| 265 | system and know that everything will continue to work smoothly. |
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| 266 | \layout Itemize |
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| 267 | |
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| 268 | Relativity is |
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| 269 | \emph on |
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| 270 | vital |
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| 271 | \layout Standard |
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| 272 | |
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| 273 | Relativity is a new feature in the VFS, and its importance cannot be stressed |
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| 274 | enough. |
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| 275 | It will make your life much easier, especially for file system intensive |
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| 276 | applications, but it will take some getting used to. |
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| 277 | If something doesn't work right the first time, chances are great it has |
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| 278 | to do with incorrect relativity settings. |
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| 279 | We will deal with relativity in depth in the Relativity section. |
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| 280 | \layout Section |
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| 281 | |
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| 282 | Basic Functions |
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| 283 | \begin_inset LatexCommand \label{sec:basic_functions} |
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| 284 | |
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| 285 | \end_inset |
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| 286 | |
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| 287 | |
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| 288 | \layout Standard |
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| 289 | |
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| 290 | These are two functions you'll need to know before we get into relativity. |
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| 291 | \layout Subsection |
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| 292 | |
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| 293 | path_parts () |
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| 294 | \begin_inset LatexCommand \label{sec:path_parts} |
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| 295 | |
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| 296 | \end_inset |
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| 297 | |
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| 298 | |
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| 299 | \layout Standard |
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| 300 | |
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| 301 | The job of path_parts () is to translate any given file location into its |
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| 302 | many component parts for any relativity. |
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| 303 | The values passed to path_parts () are: |
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| 304 | \layout Verbatim |
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| 305 | |
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| 306 | string |
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| 307 | \layout Verbatim |
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| 308 | |
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| 309 | relatives |
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| 310 | \layout Verbatim |
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| 311 | |
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| 312 | object |
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| 313 | \layout Standard |
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| 314 | |
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| 315 | 'string' is the path you want to translate, 'relatives' is the standard |
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| 316 | relativity array, and 'object' specifies how you would like the return |
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| 317 | value: if 'object' is True, an object will be returned; if 'object' is |
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| 318 | False, an array will be returned. |
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| 319 | I think you'll find the object easier to deal with, and we'll be using |
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| 320 | it throughout this document. |
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| 321 | The most important returned values (but not all) for path_parts () are: |
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| 322 | \layout Verbatim |
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| 323 | |
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| 324 | fake_full_path |
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| 325 | \layout Verbatim |
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| 326 | |
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| 327 | fake_leading_dirs |
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| 328 | \layout Verbatim |
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| 329 | |
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| 330 | fake_extra_path |
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| 331 | \layout Verbatim |
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| 332 | |
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| 333 | fake_name |
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| 334 | \layout Verbatim |
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| 335 | |
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| 336 | real_full_path |
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| 337 | \layout Verbatim |
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| 338 | |
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| 339 | real_leading_dirs |
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| 340 | \layout Verbatim |
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| 341 | |
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| 342 | real_extra_path |
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| 343 | \layout Verbatim |
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| 344 | |
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| 345 | real_name |
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| 346 | \layout Standard |
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| 347 | |
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| 348 | Just like you would think, fake_full_path contains the full virtual path |
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| 349 | of 'string', and real_full_path contains the full real path of 'string'. |
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| 350 | The fake_name and real_name variables should always be the same, and contain |
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| 351 | the final file or directory name. |
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| 352 | The leading_dirs contain everything except the name, and the extra_path |
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| 353 | is everything from the / before |
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| 354 | \begin_inset Quotes eld |
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| 355 | \end_inset |
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| 356 | |
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| 357 | home |
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| 358 | \begin_inset Quotes erd |
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| 359 | \end_inset |
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| 360 | |
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| 361 | to the end of the leading_dirs. |
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| 362 | To better illustrate, here is an example: |
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| 363 | \layout Verbatim |
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| 364 | |
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| 365 | $p = $GLOBALS['phpgw']->vfs->path_parts (array( |
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| 366 | \layout Verbatim |
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| 367 | |
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| 368 | 'string' => '/home/jason/dir/file', |
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| 369 | \layout Verbatim |
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| 370 | |
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| 371 | 'relatives' => array( |
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| 372 | \layout Verbatim |
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| 373 | |
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| 374 | RELATIVE_NONE |
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| 375 | \layout Verbatim |
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| 376 | |
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| 377 | ) |
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| 378 | \layout Verbatim |
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| 379 | |
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| 380 | )); |
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| 381 | \layout Itemize |
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| 382 | |
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| 383 | $p->fake_full_path - /home/jason/dir/file |
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| 384 | \layout Itemize |
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| 385 | |
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| 386 | $p->fake_leading_dirs - /home/jason/dir |
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| 387 | \layout Itemize |
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| 388 | |
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| 389 | $p->fake_extra_path - home/jason/dir |
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| 390 | \layout Itemize |
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| 391 | |
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| 392 | $p->fake_name - file |
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| 393 | \layout Itemize |
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| 394 | |
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| 395 | $p->real_full_path - /var/www/egroupware/files/home/jason/dir/file |
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| 396 | \layout Itemize |
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| 397 | |
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| 398 | $p->real_leading_dirs - /var/www/egroupware/files/home/jason/dir |
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| 399 | \layout Itemize |
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| 400 | |
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| 401 | $p->real_extra_path - home/jason/dir |
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| 402 | \layout Itemize |
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| 403 | |
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| 404 | $p->real_name - file |
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| 405 | \layout Standard |
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| 406 | |
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| 407 | As you can see, path_parts () is a very useful function and will save you |
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| 408 | from doing those darn substr ()'s yourself. |
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| 409 | For those of you used to the prior VFS, note that |
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| 410 | \emph on |
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| 411 | getabsolutepath () is depreciated |
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| 412 | \emph default |
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| 413 | . |
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| 414 | getabsolutepath () still exists (albeit in a much different form), and |
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| 415 | is responsible for some of the path translation, but it is an |
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| 416 | \emph on |
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| 417 | internal |
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| 418 | \emph default |
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| 419 | function only. |
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| 420 | Applications should only use path_parts (). |
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| 421 | We have shown you how to use path_parts () so you can experiment with it |
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| 422 | using different paths and relativities as we explore relativity. |
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| 423 | \layout Subsection |
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| 424 | |
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| 425 | cd () |
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| 426 | \begin_inset LatexCommand \label{sec:cd} |
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| 427 | |
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| 428 | \end_inset |
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| 429 | |
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| 430 | |
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| 431 | \layout Standard |
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| 432 | |
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| 433 | Part of the overall goal for the VFS in eGoupWare is to give the user |
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| 434 | a seamless experience during their session. |
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| 435 | For example, if they upload a file using a file manager to the directory |
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| 436 | /home/my_group/project1, and then go to download an email attachment, the |
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| 437 | default directory will be /home/my_group/project1. |
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| 438 | This is accomplished using the cd () function. |
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| 439 | Examples: |
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| 440 | \layout Verbatim |
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| 441 | |
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| 442 | /* cd to their home directory */ |
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| 443 | \layout Verbatim |
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| 444 | |
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| 445 | $GLOBALS['phpgw']->vfs->cd (array( |
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| 446 | \layout Verbatim |
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| 447 | |
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| 448 | 'string' => '/' |
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| 449 | \layout Verbatim |
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| 450 | |
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| 451 | )); |
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| 452 | \layout Verbatim |
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| 453 | |
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| 454 | \layout Verbatim |
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| 455 | |
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| 456 | /* cd to /home/jason/dir */ |
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| 457 | \layout Verbatim |
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| 458 | |
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| 459 | $GLOBALS['phpgw']->vfs->cd (array( |
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| 460 | \layout Verbatim |
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| 461 | |
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| 462 | 'string' => '/home/jason/dir', |
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| 463 | \layout Verbatim |
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| 464 | |
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| 465 | 'relative' => False, |
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| 466 | \layout Verbatim |
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| 467 | |
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| 468 | 'relatives' => array( |
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| 469 | \layout Verbatim |
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| 470 | |
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| 471 | RELATIVE_NONE |
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| 472 | \layout Verbatim |
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| 473 | |
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| 474 | ) |
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| 475 | \layout Verbatim |
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| 476 | |
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| 477 | )); |
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| 478 | \layout Verbatim |
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| 479 | |
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| 480 | \layout Verbatim |
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| 481 | |
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| 482 | /* When following the above, cd's to /home/jason/dir/dir2 */ |
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| 483 | \layout Verbatim |
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| 484 | |
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| 485 | $GLOBALS['phpgw']->vfs->cd (array( |
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| 486 | \layout Verbatim |
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| 487 | |
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| 488 | 'string' => 'dir2', |
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| 489 | \layout Verbatim |
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| 490 | |
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| 491 | 'relative' => True |
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| 492 | \layout Verbatim |
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| 493 | |
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| 494 | )); |
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| 495 | \layout Standard |
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| 496 | |
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| 497 | If 'relative' is True, the 'string' is simply appended to the current path. |
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| 498 | If you want to know what the current path is, use $GLOBALS['phpgw']->vfs->pwd |
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| 499 | (). |
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| 500 | \layout Standard |
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| 501 | |
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| 502 | Now you're ready for relativity. |
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| 503 | \layout Section |
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| 504 | |
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| 505 | Relativity |
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| 506 | \begin_inset LatexCommand \label{sec:relativity} |
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| 507 | |
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| 508 | \end_inset |
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| 509 | |
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| 510 | |
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| 511 | \layout Standard |
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| 512 | |
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| 513 | Ok, just one last thing before we get into relativity. |
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| 514 | You will notice throughout the examples the use of $fakebase. |
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| 515 | $GLOBALS['phpgw']->vfs->fakebase is by default '/home'. |
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| 516 | The old VFS was hard-coded to use '/home', but the naming choice for this |
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| 517 | is now up to administrators. |
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| 518 | See the |
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| 519 | \begin_inset LatexCommand \ref[Fakebase directory (changing /home)]{sec:fakebase} |
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| 520 | |
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| 521 | \end_inset |
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| 522 | |
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| 523 | section for more information. |
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| 524 | Throughout the rest of this document, you will see $fakebase used in calls |
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| 525 | to the VFS, and /home used in actual paths. |
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| 526 | |
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| 527 | \emph on |
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| 528 | You should always use $fakebase when making applications. |
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| 529 | |
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| 530 | \emph default |
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| 531 | I suggest doing $fakebase = $GLOBALS['phpgw']->vfs->fakebase; right off |
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| 532 | the bat to keep things neater. |
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| 533 | \layout Subsection |
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| 534 | |
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| 535 | What is it and how does it work? |
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| 536 | \layout Standard |
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| 537 | |
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| 538 | One of the design challenges for a Virtual File System is to try to figure |
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| 539 | out whether the calling application is referring to a file inside or outside |
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| 540 | the virtual root, and if inside, exactly where. |
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| 541 | To solve this problem, the eGoupWare VFS uses RELATIVE defines that |
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| 542 | are used in bitmasks passed to each function. |
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| 543 | The result is that any set of different relativities can be used in combination |
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| 544 | with each other. |
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| 545 | Let's look at a few examples. |
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| 546 | Say you want to move 'logo.png' from the user's home directory to the current |
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| 547 | directory. |
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| 548 | |
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| 549 | \layout Verbatim |
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| 550 | |
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| 551 | $GLOBALS['phpgw']->vfs->mv (array( |
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| 552 | \layout Verbatim |
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| 553 | |
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| 554 | 'from' => 'logo.png', |
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| 555 | \layout Verbatim |
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| 556 | |
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| 557 | 'to' => 'logo.png', |
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| 558 | \layout Verbatim |
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| 559 | |
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| 560 | 'relatives' => array( |
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| 561 | \layout Verbatim |
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| 562 | |
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| 563 | RELATIVE_USER, |
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| 564 | \layout Verbatim |
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| 565 | |
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| 566 | RELATIVE_ALL |
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| 567 | \layout Verbatim |
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| 568 | |
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| 569 | ) |
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| 570 | \layout Verbatim |
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| 571 | |
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| 572 | )); |
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| 573 | \layout Standard |
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| 574 | |
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| 575 | RELATIVE_USER means relative to the user's home directory. |
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| 576 | RELATIVE_ALL means relative to the current directory, as set by cd () and |
---|
| 577 | as reported by pwd (). |
---|
| 578 | So if the current directory was |
---|
| 579 | \begin_inset Quotes eld |
---|
| 580 | \end_inset |
---|
| 581 | |
---|
| 582 | $fakebase/my_group/project1 |
---|
| 583 | \begin_inset Quotes erd |
---|
| 584 | \end_inset |
---|
| 585 | |
---|
| 586 | , the call to mv () would be processed as: |
---|
| 587 | \layout Verbatim |
---|
| 588 | |
---|
| 589 | MOVE |
---|
| 590 | \begin_inset Quotes eld |
---|
| 591 | \end_inset |
---|
| 592 | |
---|
| 593 | $fakebase/jason/logo.png |
---|
| 594 | \begin_inset Quotes erd |
---|
| 595 | \end_inset |
---|
| 596 | |
---|
| 597 | TO |
---|
| 598 | \begin_inset Quotes eld |
---|
| 599 | \end_inset |
---|
| 600 | |
---|
| 601 | $fakebase/my_group/project1/logo.png |
---|
| 602 | \begin_inset Quotes erd |
---|
| 603 | \end_inset |
---|
| 604 | |
---|
| 605 | |
---|
| 606 | \layout Standard |
---|
| 607 | |
---|
| 608 | and the actual file system call would be: |
---|
| 609 | \layout Verbatim |
---|
| 610 | |
---|
| 611 | rename ('/var/www/egroupware/files/home/jason/logo.php', '/var/www/egroupware |
---|
| 612 | /files/home/my_group/project1/logo.png'); |
---|
| 613 | \layout Standard |
---|
| 614 | |
---|
| 615 | Those used to the old VFS will note that you do not have to translate the |
---|
| 616 | path beforehand. |
---|
| 617 | Let's look at another example. |
---|
| 618 | Suppose you were moving an email attachment stored in eGoupWare's temporary |
---|
| 619 | directory to the 'attachments' directory within the user's home directory |
---|
| 620 | (we're assuming the attachments directory exists). |
---|
| 621 | Note that the temporary directory is |
---|
| 622 | \emph on |
---|
| 623 | outside |
---|
| 624 | \emph default |
---|
| 625 | the virtual root. |
---|
| 626 | \layout Verbatim |
---|
| 627 | |
---|
| 628 | $GLOBALS['phpgw']->vfs->mv (array( |
---|
| 629 | \layout Verbatim |
---|
| 630 | |
---|
| 631 | 'from' => $GLOBALS['phpgw_info']['server']['temp_dir'] . |
---|
| 632 | '/' . |
---|
| 633 | $randomdir . |
---|
| 634 | '/' . |
---|
| 635 | $randomfile, |
---|
| 636 | \layout Verbatim |
---|
| 637 | |
---|
| 638 | 'to' => 'attachments/actual_name.ext', |
---|
| 639 | \layout Verbatim |
---|
| 640 | |
---|
| 641 | 'relatives' => array( |
---|
| 642 | \layout Verbatim |
---|
| 643 | |
---|
| 644 | RELATIVE_NONE|VFS_REAL, |
---|
| 645 | \layout Verbatim |
---|
| 646 | |
---|
| 647 | RELATIVE_USER |
---|
| 648 | \layout Verbatim |
---|
| 649 | |
---|
| 650 | ) |
---|
| 651 | \layout Verbatim |
---|
| 652 | |
---|
| 653 | )); |
---|
| 654 | \layout Standard |
---|
| 655 | |
---|
| 656 | $randomdir and $randomfile are what the directory and file might be called |
---|
| 657 | before they are given a proper name by the user, which is actual_name.ext |
---|
| 658 | in this example. |
---|
| 659 | RELATIVE_NONE is the define for using full path names. |
---|
| 660 | However, RELATIVE_NONE is still relative to the virtual root, so we pass |
---|
| 661 | along VFS_REAL as well, to say that the file is |
---|
| 662 | \emph on |
---|
| 663 | outside |
---|
| 664 | \emph default |
---|
| 665 | the virtual root, somewhere else in the file system. |
---|
| 666 | Once again, RELATIVE_USER means relative to the user's home directory. |
---|
| 667 | So the actual file system call might look like this (keep in mind that |
---|
| 668 | $randomdir and $randomfile are just random strings): |
---|
| 669 | \layout Verbatim |
---|
| 670 | |
---|
| 671 | rename ('/var/www/egroupware/tmp/0ak5adftgh7/jX42sC9M', '/var/www/egroupware |
---|
| 672 | /files/home/jason/attachments/actual_name.ext'); |
---|
| 673 | \layout Standard |
---|
| 674 | |
---|
| 675 | Of course you don't have to know that, nor should you be concerned with |
---|
| 676 | it; you can take it for granted that the VFS will translate the paths correctly. |
---|
| 677 | Let's take a look at one more example, this time using the RELATIVE_USER_APP |
---|
| 678 | define. |
---|
| 679 | RELATIVE_USER_APP is used to store quasi-hidden application files, similar |
---|
| 680 | to the Unix convention of ~/.appname. |
---|
| 681 | It simply appends .appname to the user's home directory. |
---|
| 682 | For example, if you were making an HTML editor application named 'htmledit', |
---|
| 683 | and wanted to keep a backup file in case something goes wrong, you could |
---|
| 684 | use RELATIVE_USER_APP to store it: |
---|
| 685 | \layout Verbatim |
---|
| 686 | |
---|
| 687 | $GLOBALS['phpgw']->vfs->write (array( |
---|
| 688 | \layout Verbatim |
---|
| 689 | |
---|
| 690 | 'string' => 'file.name~', |
---|
| 691 | \layout Verbatim |
---|
| 692 | |
---|
| 693 | 'relatives' => array( |
---|
| 694 | \layout Verbatim |
---|
| 695 | |
---|
| 696 | RELATIVE_USER_APP |
---|
| 697 | \layout Verbatim |
---|
| 698 | |
---|
| 699 | ), |
---|
| 700 | \layout Verbatim |
---|
| 701 | |
---|
| 702 | 'content' => $contents |
---|
| 703 | \layout Verbatim |
---|
| 704 | |
---|
| 705 | )); |
---|
| 706 | \layout Standard |
---|
| 707 | |
---|
| 708 | This assumes that ~/.htmledit exists of course. |
---|
| 709 | The backup file |
---|
| 710 | \begin_inset Quotes eld |
---|
| 711 | \end_inset |
---|
| 712 | |
---|
| 713 | file.name~ |
---|
| 714 | \begin_inset Quotes erd |
---|
| 715 | \end_inset |
---|
| 716 | |
---|
| 717 | would then be written in $fakebase/jason/.htmledit/file.name~. |
---|
| 718 | Note that storing files like this might not be as good of a solution as |
---|
| 719 | storing them in the temporary directory or in the database. |
---|
| 720 | But it is there in case you need it. |
---|
| 721 | \layout Subsection |
---|
| 722 | |
---|
| 723 | Complete List |
---|
| 724 | \begin_inset LatexCommand \label{sec:relatives_complete_list} |
---|
| 725 | |
---|
| 726 | \end_inset |
---|
| 727 | |
---|
| 728 | |
---|
| 729 | \layout Standard |
---|
| 730 | |
---|
| 731 | Here is the complete list of RELATIVE defines, and what they do: |
---|
| 732 | \layout Description |
---|
| 733 | |
---|
| 734 | RELATIVE_ROOT Don't translate the path at all. |
---|
| 735 | Just prepends a /. |
---|
| 736 | You'll probably want to use RELATIVE_NONE though, which handles both virtual |
---|
| 737 | and real files. |
---|
| 738 | \layout Description |
---|
| 739 | |
---|
| 740 | RELATIVE_USER User's home directory |
---|
| 741 | \layout Description |
---|
| 742 | |
---|
| 743 | RELATIVE_CURR_USER Current user's home directory. |
---|
| 744 | If the current directory is $fakebase/my_group/project1, this will return |
---|
| 745 | is $fakebase/my_group |
---|
| 746 | \layout Description |
---|
| 747 | |
---|
| 748 | RELATIVE_USER_APP Append .appname to the user's home directory, where appname |
---|
| 749 | is the current application's appname |
---|
| 750 | \layout Description |
---|
| 751 | |
---|
| 752 | RELATIVE_PATH DO NOT USE. |
---|
| 753 | Relative to the current directory, used in RELATIVE_ALL |
---|
| 754 | \layout Description |
---|
| 755 | |
---|
| 756 | RELATIVE_NONE Not relative to anything. |
---|
| 757 | Use this with VFS_REAL for files outside the virtual root. |
---|
| 758 | Note that using RELATIVE_NONE by itself still means relative to the virtual |
---|
| 759 | root |
---|
| 760 | \layout Description |
---|
| 761 | |
---|
| 762 | RELATIVE_CURRENT An alias for the currently set RELATIVE define, or RELATIVE_ALL |
---|
| 763 | if none is set (see the Defaults section) |
---|
| 764 | \layout Description |
---|
| 765 | |
---|
| 766 | VFS_REAL File is outside of the virtual root. |
---|
| 767 | Usually used with RELATIVE_NONE |
---|
| 768 | \layout Description |
---|
| 769 | |
---|
| 770 | RELATIVE_ALL Relative to the current directory. |
---|
| 771 | Use RELATIVE_ALL |
---|
| 772 | \emph on |
---|
| 773 | |
---|
| 774 | \emph default |
---|
| 775 | instead of RELATIVE_PATH |
---|
| 776 | \layout Subsection |
---|
| 777 | |
---|
| 778 | Defaults |
---|
| 779 | \begin_inset LatexCommand \label{sec:relatives_defaults} |
---|
| 780 | |
---|
| 781 | \end_inset |
---|
| 782 | |
---|
| 783 | |
---|
| 784 | \layout Standard |
---|
| 785 | |
---|
| 786 | You might be thinking to yourself that passing along RELATIVE defines with |
---|
| 787 | every VFS call is overkill, especially if your application always uses |
---|
| 788 | the same relativity. |
---|
| 789 | The default RELATIVE define for all VFS calls is RELATIVE_CURRENT. |
---|
| 790 | RELATIVE_CURRENT itself defaults to RELATIVE_ALL (relative to the current |
---|
| 791 | path), |
---|
| 792 | \emph on |
---|
| 793 | unless |
---|
| 794 | \emph default |
---|
| 795 | your application sets a specific relativity. |
---|
| 796 | If your application requires most of the work to be done outside of the |
---|
| 797 | virtual root, you may wish to set RELATIVE_CURRENT to RELATIVE_NONE|VFS_REAL. |
---|
| 798 | set_relative () is the function to do this. |
---|
| 799 | For example: |
---|
| 800 | \layout Verbatim |
---|
| 801 | |
---|
| 802 | $GLOBALS['phpgw']->vfs->set_relative (array( |
---|
| 803 | \layout Verbatim |
---|
| 804 | |
---|
| 805 | 'mask' => RELATIVE_NONE|VFS_REAL |
---|
| 806 | \layout Verbatim |
---|
| 807 | |
---|
| 808 | )); |
---|
| 809 | \layout Verbatim |
---|
| 810 | |
---|
| 811 | \layout Verbatim |
---|
| 812 | |
---|
| 813 | $GLOBALS['phpgw']->vfs->read (array( |
---|
| 814 | \layout Verbatim |
---|
| 815 | |
---|
| 816 | 'string' => '/etc/passwd' |
---|
| 817 | \layout Verbatim |
---|
| 818 | |
---|
| 819 | )); |
---|
| 820 | \layout Verbatim |
---|
| 821 | |
---|
| 822 | \layout Verbatim |
---|
| 823 | |
---|
| 824 | $GLOBALS['phpgw']->vfs->cp (array( |
---|
| 825 | \layout Verbatim |
---|
| 826 | |
---|
| 827 | 'from' => '/usr/include/stdio.h', |
---|
| 828 | \layout Verbatim |
---|
| 829 | |
---|
| 830 | 'to' => '/tmp/stdio.h' |
---|
| 831 | \layout Verbatim |
---|
| 832 | |
---|
| 833 | )); |
---|
| 834 | \layout Verbatim |
---|
| 835 | |
---|
| 836 | \layout Verbatim |
---|
| 837 | |
---|
| 838 | $GLOBALS['phpgw']->vfs->cp (array( |
---|
| 839 | \layout Verbatim |
---|
| 840 | |
---|
| 841 | 'from' => '/usr/share/pixmaps/yes.xpm', |
---|
| 842 | \layout Verbatim |
---|
| 843 | |
---|
| 844 | 'to' => 'icons/yes.xpm', |
---|
| 845 | \layout Verbatim |
---|
| 846 | |
---|
| 847 | 'relatives' => array( |
---|
| 848 | \layout Verbatim |
---|
| 849 | |
---|
| 850 | RELATIVE_CURRENT, |
---|
| 851 | \layout Verbatim |
---|
| 852 | |
---|
| 853 | RELATIVE_USER |
---|
| 854 | \layout Verbatim |
---|
| 855 | |
---|
| 856 | ) |
---|
| 857 | \layout Verbatim |
---|
| 858 | |
---|
| 859 | )); |
---|
| 860 | \layout Standard |
---|
| 861 | |
---|
| 862 | You should notice that no relativity array is needed in the other calls |
---|
| 863 | that refer to files outside the virtual root, but one is needed for calls |
---|
| 864 | that include files inside the virtual root. |
---|
| 865 | Any RELATIVE define can be set as the default and works in the same fashion. |
---|
| 866 | To retrieve the currently set define, use get_relative (). |
---|
| 867 | Note that the relativity is reset after each page request; that is, it's |
---|
| 868 | good only for the life of the current page loading, and is not stored in |
---|
| 869 | session management. |
---|
| 870 | \layout Section |
---|
| 871 | |
---|
| 872 | Function reference |
---|
| 873 | \begin_inset LatexCommand \label{sec:function_reference} |
---|
| 874 | |
---|
| 875 | \end_inset |
---|
| 876 | |
---|
| 877 | |
---|
| 878 | \layout Standard |
---|
| 879 | |
---|
| 880 | To view the function reference for the VFS, use the doc/inlinedocparser.php |
---|
| 881 | script that comes with eGoupWare, ie |
---|
| 882 | \begin_inset LatexCommand \url[http://localhost/doc/inlinedocparser.php?fn=class.vfs_sql.inc.php]{http://localhost/doc/inlinedocparser.php?fn=class.vfs_sql.inc.php} |
---|
| 883 | |
---|
| 884 | \end_inset |
---|
| 885 | |
---|
| 886 | . |
---|
| 887 | \layout Section |
---|
| 888 | |
---|
| 889 | Notes |
---|
| 890 | \begin_inset LatexCommand \label{sec:notes} |
---|
| 891 | |
---|
| 892 | \end_inset |
---|
| 893 | |
---|
| 894 | |
---|
| 895 | \layout Subsection |
---|
| 896 | |
---|
| 897 | Database |
---|
| 898 | \begin_inset LatexCommand \label{sec:database} |
---|
| 899 | |
---|
| 900 | \end_inset |
---|
| 901 | |
---|
| 902 | |
---|
| 903 | \layout Standard |
---|
| 904 | |
---|
| 905 | Data about the files and directories within the virtual root is kept in |
---|
| 906 | the SQL database. |
---|
| 907 | Currently, this information includes: |
---|
| 908 | \layout Itemize |
---|
| 909 | |
---|
| 910 | File ID (used internally, primary key for table) |
---|
| 911 | \layout Itemize |
---|
| 912 | |
---|
| 913 | Owner ID (phpGW account_id) |
---|
| 914 | \layout Itemize |
---|
| 915 | |
---|
| 916 | Created by ID (phpGW account_id) |
---|
| 917 | \layout Itemize |
---|
| 918 | |
---|
| 919 | Modified by ID (phpGW account_id) |
---|
| 920 | \layout Itemize |
---|
| 921 | |
---|
| 922 | Created (date) |
---|
| 923 | \layout Itemize |
---|
| 924 | |
---|
| 925 | Modified (date) |
---|
| 926 | \layout Itemize |
---|
| 927 | |
---|
| 928 | Size (bytes) |
---|
| 929 | \layout Itemize |
---|
| 930 | |
---|
| 931 | MIME type |
---|
| 932 | \layout Itemize |
---|
| 933 | |
---|
| 934 | Deleteable (Y/N/Other?) |
---|
| 935 | \layout Itemize |
---|
| 936 | |
---|
| 937 | Comment |
---|
| 938 | \layout Itemize |
---|
| 939 | |
---|
| 940 | App (appname of application that created the file) |
---|
| 941 | \layout Itemize |
---|
| 942 | |
---|
| 943 | Directory (directory the file or directory is in) |
---|
| 944 | \layout Itemize |
---|
| 945 | |
---|
| 946 | Name (name of file or directory) |
---|
| 947 | \layout Itemize |
---|
| 948 | |
---|
| 949 | Link directory (if the file or directory is linked, what the actual directory |
---|
| 950 | is) |
---|
| 951 | \layout Itemize |
---|
| 952 | |
---|
| 953 | Link name (if the file or directory is linked, what the actual name is) |
---|
| 954 | \layout Itemize |
---|
| 955 | |
---|
| 956 | Version (numeric version of the file) |
---|
| 957 | \layout Standard |
---|
| 958 | |
---|
| 959 | The internal names of these (the database column names) are stored in the |
---|
| 960 | $GLOBALS['phpgw']->vfs->attributes array, which is useful for loops, and |
---|
| 961 | is guaranteed to be up-to-date. |
---|
| 962 | \layout Standard |
---|
| 963 | |
---|
| 964 | Note that no information is kept about files outside the virtual root. |
---|
| 965 | If a file is moved outside, all records of it are deleted from the database |
---|
| 966 | (other than the journaling records). |
---|
| 967 | If a file is moved into the virtual root, some information, specifically |
---|
| 968 | MIME-type, is not always stored in the database. |
---|
| 969 | The vital information has defaults: owner is based on where the file is |
---|
| 970 | being stored; size is correctly read; deleteable is set to Y. |
---|
| 971 | \layout Subsection |
---|
| 972 | |
---|
| 973 | ACL support |
---|
| 974 | \begin_inset LatexCommand \label{sec:acl_support} |
---|
| 975 | |
---|
| 976 | \end_inset |
---|
| 977 | |
---|
| 978 | |
---|
| 979 | \layout Standard |
---|
| 980 | |
---|
| 981 | ACL support is built into the VFS. |
---|
| 982 | vfs->acl_check () does the actual checking, and is called from all VFS |
---|
| 983 | functions as needed. |
---|
| 984 | If the file or directory sent to acl_check () doesn't exist, the permissions |
---|
| 985 | for the parent directory are used to determine access. |
---|
| 986 | ACL checking can be overridden at any time by setting vfs->override_acl. |
---|
| 987 | For example: |
---|
| 988 | \layout Verbatim |
---|
| 989 | |
---|
| 990 | $GLOBALS['phpgw']->vfs->override_acl = 1; |
---|
| 991 | \layout Verbatim |
---|
| 992 | |
---|
| 993 | $GLOBALS['phpgw']->vfs->mkdir (array( |
---|
| 994 | \layout Verbatim |
---|
| 995 | |
---|
| 996 | 'string' => $GLOBALS['fakebase']. |
---|
| 997 | '/' . |
---|
| 998 | $group_array['account_name'], |
---|
| 999 | \layout Verbatim |
---|
| 1000 | |
---|
| 1001 | 'relatives' => array( |
---|
| 1002 | \layout Verbatim |
---|
| 1003 | |
---|
| 1004 | RELATIVE_NONE |
---|
| 1005 | \layout Verbatim |
---|
| 1006 | |
---|
| 1007 | ) |
---|
| 1008 | \layout Verbatim |
---|
| 1009 | |
---|
| 1010 | )); |
---|
| 1011 | \layout Verbatim |
---|
| 1012 | |
---|
| 1013 | $GLOBALS['phpgw']->vfs->override_acl = 0; |
---|
| 1014 | \layout Subsection |
---|
| 1015 | |
---|
| 1016 | Function aliases |
---|
| 1017 | \begin_inset LatexCommand \label{sec:function_aliases} |
---|
| 1018 | |
---|
| 1019 | \end_inset |
---|
| 1020 | |
---|
| 1021 | |
---|
| 1022 | \layout Standard |
---|
| 1023 | |
---|
| 1024 | You might have noticed there are some functions that just pass the arguments |
---|
| 1025 | on to other functions. |
---|
| 1026 | These are provided in part because of legacy and in part for convenience. |
---|
| 1027 | You can use either. |
---|
| 1028 | Here is the list (alias -> actual): |
---|
| 1029 | \layout Itemize |
---|
| 1030 | |
---|
| 1031 | copy -> cp |
---|
| 1032 | \layout Itemize |
---|
| 1033 | |
---|
| 1034 | move -> rm |
---|
| 1035 | \layout Itemize |
---|
| 1036 | |
---|
| 1037 | delete -> rm |
---|
| 1038 | \layout Itemize |
---|
| 1039 | |
---|
| 1040 | dir -> ls |
---|
| 1041 | \layout Subsection |
---|
| 1042 | |
---|
| 1043 | Fakebase directory (changing /home) |
---|
| 1044 | \begin_inset LatexCommand \label{sec:fakebase} |
---|
| 1045 | |
---|
| 1046 | \end_inset |
---|
| 1047 | |
---|
| 1048 | |
---|
| 1049 | \layout Standard |
---|
| 1050 | |
---|
| 1051 | The old VFS was hard-coded to use '/home' as the fake base directory, even |
---|
| 1052 | though the user never saw it. |
---|
| 1053 | With the new system, crafty administrators may wish to change '/home' to |
---|
| 1054 | something else, say '/users' or '/public_html'. |
---|
| 1055 | The fake base directory name is stored in $GLOBALS['phpgw']->vfs->fakebase, |
---|
| 1056 | and changing it will transparently change it throughout the VFS and all |
---|
| 1057 | applications. |
---|
| 1058 | However, this must be done |
---|
| 1059 | \emph on |
---|
| 1060 | before |
---|
| 1061 | \emph default |
---|
| 1062 | any data is in the VFS database. |
---|
| 1063 | If you wish to change it afterwords, you'll have to manually update the |
---|
| 1064 | database, replacing the old value with the new value. |
---|
| 1065 | |
---|
| 1066 | \emph on |
---|
| 1067 | Application programmers need to recognize that /home is not absolute, and |
---|
| 1068 | use $GLOBALS['phpgw']->vfs->fakebase instead |
---|
| 1069 | \emph default |
---|
| 1070 | . |
---|
| 1071 | I suggest setting $fakebase = $GLOBALS['phpgw']->vfs->fakebase; right off |
---|
| 1072 | the bat to keep things neater. |
---|
| 1073 | \layout Section |
---|
| 1074 | |
---|
| 1075 | About this Document |
---|
| 1076 | \layout Subsection |
---|
| 1077 | |
---|
| 1078 | Copyright and License |
---|
| 1079 | \layout Standard |
---|
| 1080 | |
---|
| 1081 | Copyright (c) 2001, 2002 Jason Wies |
---|
| 1082 | \layout Standard |
---|
| 1083 | |
---|
| 1084 | Permission is granted to copy, distribute and/or modify this document under |
---|
| 1085 | the terms of the GNU Free Documentation License, Version 1.1 or any later |
---|
| 1086 | version published by the Free Software Foundation; with no Invarient Sections, |
---|
| 1087 | with no Front-Cover Texts, and no Back-Cover Texts. |
---|
| 1088 | \layout Standard |
---|
| 1089 | |
---|
| 1090 | A copy of the license is available at |
---|
| 1091 | \begin_inset LatexCommand \url[http://www.gnu.org/copyleft/fdl.html]{http://www.gnu.org/copyleft/fdl.html} |
---|
| 1092 | |
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| 1093 | \end_inset |
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| 1094 | |
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| 1095 | . |
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| 1096 | \layout Subsection |
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| 1097 | |
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| 1098 | History |
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| 1099 | \layout Standard |
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| 1100 | |
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| 1101 | Original document released in June 2001 by Jason Wies. |
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| 1102 | \layout Standard |
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| 1103 | |
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| 1104 | Updated February 2002 to include arrayized parameters, single quotes, and |
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| 1105 | GLOBALS. |
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| 1106 | \layout Subsection |
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| 1107 | |
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| 1108 | Contributing |
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| 1109 | \layout Standard |
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| 1110 | |
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| 1111 | Contributions are always welcome. |
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| 1112 | Please send to the current maintainer, Jason Wies, |
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| 1113 | |
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| 1114 | |
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| 1115 | \end_inset |
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| 1116 | |
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| 1117 | . |
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| 1118 | \the_end |
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