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74 lines
3.6 KiB
Plaintext
74 lines
3.6 KiB
Plaintext
Release information for 3.3.0
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-------------------------------------
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This release contains various improvements which require your manual
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interaction during an upgrade from an earlier version. You should definitely
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make a backup of your database and possibly your content folder.
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Folder search
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-------------
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The new folder search has introduced a new database field which has to
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be initially filled. Without that field searching for subfolders in a
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folder will not work. See below.
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Data conversion
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---------------
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The conversion of strings like names and comments of documents and folders,
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when saved in the database, has been completely droped. The conversion was
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originally done for security reasons, both to prevent sql injections and cross
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side scripting. Basically any field data that could do any harm, was replaced
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by 'harmless' chars. Ampersands, semi colons, quotes, etc., they all have been
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replaced by their html entity or masked by a backslash. The output of those
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fields on html pages was not decoded anymore, but any other application that
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accessed the database had to decode the data.
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The new approach with less impact on the data keeps the data
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unmodified when saving it in the database without opening new security
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wholes. Protection against cross side scripting is done when the data
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is placed on a html page.
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As a consequence the complete database has to be searched for those
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previously converted strings and converted back into the original value.
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The conversion is done right after the database update during the
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installation and upgrade process.
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Content directory
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-----------------
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Each document in LetoDMS is associated with a directory in the file system.
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Consequently, there is a limitation of documents set by the maximum number
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of subdirectories in a directory of the filesystem. The currently most used
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filesystem on Linux (ext3) supports only 31998 directories. In order to
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overcome this limitation another level of directories has been put inbetween
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the content directory and the document directory numbered from 1 to
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maxDirID. This allows a theorethical maximum of square(maxDirID) documents.
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The path to the document folder consists of the new path id and the document
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id (<pathid>/<docid>). The path id is derived from the document id by the
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formula
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floor(docid/maxDirID) + 1
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Hence, all documents with an id from 1 to maxDirID have the path '1/<docid>'.
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The limiting factor of this schema is the number of document ids. It cannot
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be higher than square(maxDirID).
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If you intend to switch to the new multi level content directory format, you
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will have to set maxDirID to a value > 0 (possibly 31998) and create one or
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more new directories starting with name '1' below the content dir and move
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all document directories into it. How many new directories are needed
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depends on the maximum document id already used. If the maximum document id
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is <= maxDirID, then you will only need one directory named '1'. If the
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maximum document id is <= 2*maxDirID you will need another directory named
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'2'. If you have already a document with id 1 (or 2, 3, 4, ...), you must
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choose a different name for your new sub directory and rename to 1 (or 2, 3,
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4, ...) after all document directories have been moved.
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If you want to keep the current content directory structure set maxDirID to
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0. Make sure the maxDirID remains unchanged for a content directory.
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After finishing update
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----------------------
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Once you are done with the update, log in as administrator and make an
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object check in the admin tools. This will fill the new database field
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needed for the folder search and fill it with the appropriate value.
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