MACROMEDIA CONTRIBUTE 3-CONTRIBUTE PUBLISHING SERVER User's Guide download pdf (Page 23)

ADOBE CONTRIBUTE CS3

User Guide

FTP and SFTP file permissions

Typically, FTP servers are configured so that when they create (or write) a new file, the permissions created for the

file give the person uploading the file read/write permission and give members in the permission group read-only

access.

In the case of Contribute, this process can cause a problem when another user tries to edit a page. Contribute can

read the file, but when it attempts to copy the updated file back to the web server, the FTP server’s file permissions

prevent Contribute from writing the new file.

When configuring your FTP server to work with Contribute, be certain to configure the file permissions that the

FTP server creates for new files so that members of the permission group can read and write the file. This issue

typically occurs on UNIX servers. Set the permissions for files to umask 664, which provides read and write access

to the file owner (the person who created the file) and to the permissions group (which would include any users

needing to connect to the website to update the file).

WebDAV

Web-based Distributed Authoring and Versioning (WebDAV) is a series of extensions to the HTTP protocol that lets

users collaboratively update and manage files on a website. A key feature of the WebDAV protocol is file locking.

Users connecting to a WebDAV-enabled site lock files when they open the file for editing. This prevents a user of the

same website from overwriting another user’s changes.

To use Contribute with a WebDAV-enabled site, you must use a WebDAV server that supports exclusive write locks.

Exclusive write locks guarantee that only the lock owner (the person who opened the file for editing) can overwrite

the file.

Note: Some WebDAV servers support shared write locks, which allow two or more users to collaborate concurrently on

a web page. Contribute does not support shared write locks. If a user opens a page using Contribute on a WebDAV-

enabled site that uses shared locks, Contribute opens the file only if it can create an exclusive lock. If another user is

editing the file, Contribute informs the user that the file is not available for editing.

When creating a connection to a WebDAV-enabled site, you must provide a WebDAV-specific URL. This might

consist of a specific port number used by the WebDAV site.

For example, suppose that this is the URL of your site:

www.mysite.com/

This might be the WebDAV URL:

www.mysite.com:81/

Appending the port number 81 to the site’s domain name specifies the network address used by WebDAV.

WebDAV-enabled sites often have their own user name and password requirements. You can create these on an

individual basis, or you can create a group user name and password.

When creating a connection to a WebDAV site, you must not mix connection types (such as FTP with WebDAV or

local area network with WebDAV). You must use only the WebDAV connection type. When you create a connection

to a website using local area network, FTP, or SFTP connections, Contribute uses its own file-locking mechanism to

prevent users from overwriting each other’s files. Contribute connections using these connection types cannot detect

files locked with WebDAV locks and could inadvertently open a file being edited by a WebDAV-enabled connection.

To prevent users from setting up different connection types to a WebDAV-enabled site, do one of the following:

• Tell users creating connections that they should use only the WebDAV connection type with WebDAV-enabled

sites.

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