Mod_wsgi 0.0.4

Server NGINX
1

I’m pleased to annunce the 0.0.4 release for mod_wsgi.

mod_wsgi is an implementation of the WSGI PEP
(PEP 333 – Python Web Server Gateway Interface v1.0 | peps.python.org) for the Nginx web server.

Starting with this release mod_wsgi is a fully conforming implementation
of the WSGI specification (but there still can be some small problems).

Here is the changelog:

  • Bug fix: wsgi.errors.write and wsgi.errors.writelines don’t
    ignore conversion specification characters, used internally by
    ngx_log_error for message formatting.

  • Bug fix: when WSGI application does not set the Date or Server
    headers, nginx sends duplicate headers.

  • Added a new directive wsgi_temp_path and a new variable
    NGX_HTTP_WSGI_TEMP_PATH in the config script.

    Improved the write callable buffering support.

  • Fixed an annoying problem with paths without ending slash when
    using --add-module configure option.

  • Added patches for support of nginx < 0.5.32 and nginx 0.6.x.

  • Improved the configuration script, with correct external
    Python build dependencies handling.

  • Bug fix: changed again the memory management code, using a queue.

  • Bug fix: broken implementation of ngx_list_pop.
    This solves a memory corruption problem when serving large
    files (using nginx-file sample application) with a “slow” client
    or connection.

  • Improved the write callable so that it now is fully conforming
    with the WSGI spec.

    Replaced the WSGI_BUFFERED_WRITE macro with the
    wsgi_write_buffering directive.

  • Added an alternative implementation of the write callable, that
    buffers all the data.

    This function is the default one used, but this can be changed
    using the WSGI_BUFFERED_WRITE macro in the module configuration
    file.

    Added a wsgi_write_buffer_size directive to control the buffer
    size.

    Note that this implementation does not conform with the WSGI
    spec.

  • Added integrated support for cache validation in mod_wsgi using a
    custom header filter.
    Only the Last-Modified validator is supported.

  • Added experimental support for the process reload mechanism.

  • Implemented the write callable.

    This implementation is limited, since when data cannot be sent to
    OS buffers, an IOError exception is raised.

  • Implemented the start_response callable.

  • Implemented the wsgi_output_buffering directive.
    When this directive is disabled (the default) the buffer sent to
    the output filter is flushed.

Note that the default write callable implementation uses an hack to be
fully conforming (it sets the socket to blocking mode).

Please note that mod_wsgi is not a “standard” nginx module;
It should not be used for embedding Python applications inside your
primary web server.

Manlio P.

2

Manlio P. ha scritto:

I’m pleased to annunce the 0.0.4 release for mod_wsgi.

mod_wsgi is an implementation of the WSGI PEP
(PEP 333 – Python Web Server Gateway Interface v1.0 | peps.python.org) for the Nginx web server.

Starting with this release mod_wsgi is a fully conforming implementation
of the WSGI specification (but there still can be some small problems).

The Mercurial repository can be found here:
http://hg.mperillo.ath.cx/nginx/mod_wsgi/

Manlio P.