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A tornado-based implementation of the SmartHTTP protocol used by git
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README.md

GitTornado

GitTornado is a tornado-based implementation of the git-http-backend supporting chunked transfer encoding. It is designed to use little resources and as such will try its best to avoid reading whole files or git output into memory.

How to Install

$ pip install gittornado

How to Use

To best suit your needs, you should include the provided RequestHandlers into your tornado application. An example of such an application is given in server.py. The example server will also install itself as a console-script, so you can do

$ gittornado

and you will have the example server running on port 8080, serving the git repositories in your working directory world-readable.

Why not WSGI

The WSGI standard doesn't offer a consistent way of working with requests that do not offer a Content-Length header. mod_wsgi provides an option to read chunked requests into memory and fake the Content-Length header. This however means that if you commit a 600 MB file into your git repository, mod_wsgi will allocate 600 MB of RAM.

Tornado offers a simple event-driven approach of handling HTTP requests, therefore it is a prime candidate for a pythonic implementation of git-http-backend.

If you need to combine GitTornado with a WSGI app, for example if you would like to also have a webinterface for your repository under the same URL, you can use tornado's WSGIContainer:

fallbackapp = tornado.wsgi.WSGIContainer(wsgiapp)
app = tornado.web.Application([
   ('/.*/.*/git-.*', RPCHandler, config_dict),
   ('/.*/.*/info/refs', InfoRefsHandler, config_dict),
   ('/.*/.*/HEAD', FileHandler, config_dict),
   ('/.*/.*/objects/.*', FileHandler, config_dict),
   ('.*', tornado.web.FallbackHandler, {'fallback': fallbackapp})
])

Apache

If you want to integrate GitTornado into an existing site, you can use mod_proxy together with mod_proxy_http to configure a reverse proxy:

ProxyPass /git/ http://127.0.0.1:8080/
ProxyPassReverse /git/ http://127.0.0.1:8080/

Production

For productional use, you might want to put GitTornado behind a reverse proxy / load balancer, for example Apache or nginx and start one process for every CPU instruction queue on your machine.

License

GitTornado is licensed under GPLv3.

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