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From Florian Müller <>
Subject CMIS Bridge
Date Fri, 11 May 2012 10:38:12 GMT
 Hi all,

 We have built something that we would like to contribute to OpenCMIS. 
 We have called it the CMIS Bridge.

 The CMIS Bridge acts like a proxy between a CMIS client and a CMIS 
 repository. This proxy can intercept CMIS requests and manipulate the 
 data that goes in and out.

 Here are a few use cases for the CMIS Bridge:
 - Binding changes. For example, a repository with a broken Web Services 
 binding implementation can use the bridge to accept Web Services calls 
 and turn them into AtomPub calls. And vice versa, of course.
 - Repositories that don't implement the browser binding yet can use it 
 as a quick way to provide the browser binding.
 - The bridge can also host a web application that uses the browser 
 binding without the hassle of dealing with the same-origin policy in web 
 - It can be used as a repository filter. It may only allow access to a 
 few but not all repositories that a server exposes.
 - The bridge may handle authentication mechanisms that the target 
 repository cannot handle. The combination of the browser binding and 
 OAuth comes to mind.
 - Objects and properties can be hidden and virtual objects and 
 properties can be added on the fly.
 - Objects can be enriched on the fly. For example, when a client 
 uploads a MP3 file the bridge can extract the MP3 metadata and adds them 
 before the object is created on the target repository.
 - Folder structures and templates can be created on the fly.
 - It can be used in protect a repository. For example, the repository 
 could run behind a firewall and the bridge resides in the DMZ.

 There are probably many more use cases.

 The current implementation is quite basic. It works, but there is a lot 
 of room for improvement and optimization. This is something we want to 
 do over the next weeks and months.

 Are there any objections to add this to OpenCMIS?



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