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File Attachments |
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- Click on the
Attach link at the bottom of the page. The Attach screen lets you browse for a file, add a comment, and upload it. The uploaded file will show up in the File Attachment table.
- NOTE: The topic must already exist. It is a two step process if you want to attach a file to a non-existing topic; first create the topic, then add the file attachment.
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- TWiki is capable of getting up to 10 files per upload session. Whether you can actually upload multiple files in one go from web user interface depends on skin.
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- Any type of file can be uploaded. Some files that might pose a security risk are renamed, ex:
*.php files are renamed to *.php.txt so that no one can place code that would be read in a .php file.
- The previous upload path is retained for convenience. In case you make some changes to the local file and want to upload it, again you can copy the previous upload path into the Local file field.
- TWiki can limit the file size. This is defined by the
%ATTACHFILESIZELIMIT% variable of the TWikiPreferences, currently set at 10000 KB.
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- To change the comment on an attachment, enter a new comment and then click Change properties. Note that the comment listed against the specific version will not change, however the comment displayed when viewing the topic does change.
- To hide/unhide an attachment, enable the
Hide file checkbox, then click Change properties.
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> | File names
File systems tend to be liberal about characters used in file names.
But there are characters which may cause problems if they are used in a file name of a TWiki attachment.
As such, when TWiki saves an uploaded file attachment, it's saved as a file whose name is cleansed to avoid problems.
Specifically:
- Space are replaed by underscores
- The
.txt extension is appended to some filenames for security reasons
- Characters such as
~, $, @, % are removed
- Non-ASCII characters are deleted
When an attachment file name is altered by the process above, you are notified |
| | Known Issues
- Unlike topics, attachments are not locked during editing. As a workaround, you can change the comment to indicate an attachment file is being worked on - the comment on the specific version isn't lost, it's there when you list all versions of the attachment.
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