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django-devserver 0.8.0

Drop-in replacement for Django's runserver


A drop in replacement for Django’s built-in runserver command. Features include:

  • An extendable interface for handling things such as real-time logging.
  • Integration with the werkzeug interactive debugger.
  • Threaded (default) and multi-process development servers.
  • Ability to specify a WSGI application as your target environment.


django-devserver works on Django 1.3 and newer


To install the latest stable version:

pip install git+git://

django-devserver has some optional dependancies, which we highly recommend installing.

  • pip install sqlparse – pretty SQL formatting
  • pip install werkzeug – interactive debugger
  • pip install guppy – tracks memory usage (required for MemoryUseModule)
  • pip install line_profiler – does line-by-line profiling (required for LineProfilerModule)

You will need to include devserver in your INSTALLED_APPS:



Once installed, using the new runserver replacement is easy. You must specify verbosity of 0 to disable real-time log output:

python runserver

Note: This will force settings.DEBUG to True.

By default, devserver would bind itself to To change this default, DEVSERVER_DEFAULT_ADDR and DEVSERVER_DEFAULT_PORT settings are available.

Additional CLI Options

--werkzeug Tells Django to use the Werkzeug interactive debugger, instead of it’s own.
--forked Use a forking (multi-process) web server instead of threaded.
--dozer Enable the dozer memory debugging middleware (at /_dozer)
--wsgi-app Load the specified WSGI app as the server endpoint.

Please see python runserver --help for more information additional options.

Note: You may also use devserver’s middleware outside of the management command:



The following options may be configured via your

Additional command line arguments to pass to the runserver command (as defaults).
The default address to bind to.
The default port to bind to.
A list of additional WSGI middleware to apply to the runserver command.
A list of devserver modules to load.
DEVSERVER_IGNORED_PREFIXES = [‘/media’, ‘/uploads’]
A list of prefixes to surpress and skip process on. By default, ADMIN_MEDIA_PREFIX, MEDIA_URL and STATIC_URL (for Django >= 1.3) will be ignored (assuming MEDIA_URL and STATIC_URL is relative)


django-devserver includes several modules by default, but is also extendable by 3rd party modules. This is done via the DEVSERVER_MODULES setting:


    # Modules not enabled by default


Outputs queries as they happen to the terminal, including time taken.

Disable SQL query truncation (used in SQLRealTimeModule) with the DEVSERVER_TRUNCATE_SQL setting:


Filter SQL queries with the DEVSERVER_FILTER_SQL setting:

        re.compile('djkombu_\w+'),  # Filter all queries related to Celery


Outputs a summary of your SQL usage.


Outputs a summary of the request performance.


Outputs a notice when memory use is increased (at the end of a request cycle).


Profiles view methods on a line by line basis. There are 2 ways to profile your view functions, by setting setting.DEVSERVER_AUTO_PROFILE = True or by decorating the view functions you want profiled with devserver.modules.profile.devserver_profile. The decoration takes an optional argument follow which is a sequence of functions that are called by your view function that you would also like profiled.

An example of a decorated function:

@devserver_profile(follow=[foo, bar])
def home(request):
    result['foo'] = foo()
    result['bar'] = bar()

When using the decorator, we recommend that rather than import the decoration directly from devserver that you have code somewhere in your project like:

    if 'devserver' not in settings.INSTALLED_APPS:
        raise ImportError
    from devserver.modules.profile import devserver_profile
except ImportError:
    from functools import wraps
    class devserver_profile(object):
        def __init__(self, *args, **kwargs):
        def __call__(self, func):
            def nothing(*args, **kwargs):
                return func(*args, **kwargs)
            return wraps(func)(nothing)

By importing the decoration using this method, devserver_profile will be a pass through decoration if you aren’t using devserver (eg in production)


Outputs a summary of your cache calls at the end of the request.


Outputs the content of any AJAX responses

Change the maximum response length to dump with the DEVSERVER_AJAX_CONTENT_LENGTH setting:



Outputs information about the current session and user.

Building Modules

Building modules in devserver is quite simple. In fact, it resembles the middleware API almost identically.

Let’s take a sample module, which simple tells us when a request has started, and when it has finished:

from devserver.modules import DevServerModule

class UselessModule(DevServerModule):
    logger_name = 'useless'

    def process_request(self, request):'Request started')

    def process_response(self, request, response):'Request ended')

There are additional arguments which may be sent to logger methods, such as duration:

# duration is in milliseconds'message', duration=13.134)
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django-devserver-0.8.0.tar.gz (md5) Source 2014-05-02 16KB
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