Что такое daphne python

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DAPHNE: An Open and Extensible System Infrastructure for Integrated Data Analysis Pipelines

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daphne-eu/daphne

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README.md

«The DAPHNE project aims to define and build an open and extensible system infrastructure for integrated data analysis pipelines, including data management and processing, high-performance computing (HPC), and machine learning (ML) training and scoring.» (more information on https://daphne-eu.eu/)

In this repository, we develop the whole DAPHNE system with all its components including, but not limited to DaphneDSL, DaphneLib, DaphneIR, the DAPHNE Compiler, and the DAPHNE Run-time. The system will be built up and extended gradually in the course of the project.

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DAPHNE: An Open and Extensible System Infrastructure for Integrated Data Analysis Pipelines

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Django Channels HTTP/WebSocket server

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django/daphne

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README.rst

Daphne is a HTTP, HTTP2 and WebSocket protocol server for ASGI and ASGI-HTTP, developed to power Django Channels.

It supports automatic negotiation of protocols; there’s no need for URL prefixing to determine WebSocket endpoints versus HTTP endpoints.

Simply point Daphne to your ASGI application, and optionally set a bind address and port (defaults to localhost, port 8000):

daphne -b 0.0.0.0 -p 8001 django_project.asgi:application

If you intend to run daphne behind a proxy server you can use UNIX sockets to communicate between the two:

daphne -u /tmp/daphne.sock django_project.asgi:application

If daphne is being run inside a process manager, you might want it to bind to a file descriptor passed down from a parent process. To achieve this you can use the —fd flag:

daphne --fd 5 django_project.asgi:application

If you want more control over the port/socket bindings you can fall back to using twisted’s endpoint description strings by using the —endpoint (-e) flag, which can be used multiple times. This line would start a SSL server on port 443, assuming that key.pem and crt.pem exist in the current directory (requires pyopenssl to be installed):

daphne -e ssl:443:privateKey=key.pem:certKey=crt.pem django_project.asgi:application

Endpoints even let you use the txacme endpoint syntax to get automatic certificates from Let’s Encrypt, which you can read more about at http://txacme.readthedocs.io/en/stable/.

To see all available command line options run daphne with the -h flag.

Daphne supports terminating HTTP/2 connections natively. You’ll need to do a couple of things to get it working, though. First, you need to make sure you install the Twisted http2 and tls extras:

pip install -U "Twisted[tls,http2]"

Next, because all current browsers only support HTTP/2 when using TLS, you will need to start Daphne with TLS turned on, which can be done using the Twisted endpoint syntax:

daphne -e ssl:443:privateKey=key.pem:certKey=crt.pem django_project.asgi:application

Alternatively, you can use the txacme endpoint syntax or anything else that enables TLS under the hood.

You will also need to be on a system that has OpenSSL 1.0.2 or greater; if you are using Ubuntu, this means you need at least Ubuntu 16.04.

Now, when you start up Daphne, it should tell you this in the log:

2017-03-18 19:14:02,741 INFO Starting server at ssl:port=8000:privateKey=privkey.pem:certKey=cert.pem, channel layer django_project.asgi:channel_layer. 2017-03-18 19:14:02,742 INFO HTTP/2 support enabled

Then, connect with a browser that supports HTTP/2, and everything should be working. It’s often hard to tell that HTTP/2 is working, as the log Daphne gives you will be identical (it’s HTTP, after all), and most browsers don’t make it obvious in their network inspector windows. There are browser extensions that will let you know clearly if it’s working or not.

Daphne only supports «normal» requests over HTTP/2 at this time; there is not yet support for extended features like Server Push. It will, however, result in much faster connections and lower overheads.

If you have a reverse proxy in front of your site to serve static files or similar, HTTP/2 will only work if that proxy understands and passes through the connection correctly.

In order to set the root path for Daphne, which is the equivalent of the WSGI SCRIPT_NAME setting, you have two options:

• Pass a header value Daphne-Root-Path , with the desired root path as a URLencoded ASCII value. This header will not be passed down to applications.
• Set the —root-path commandline option with the desired root path as a URLencoded ASCII value.

The header takes precedence if both are set. As with SCRIPT_ALIAS , the value should start with a slash, but not end with one; for example:

daphne --root-path=/forum django_project.asgi:application

Daphne requires Python 3.7 or later.

To run tests, make sure you have installed the tests extra with the package:

cd daphne/ pip install -e '.[tests]' pytest

To report security issues, please contact security@djangoproject.com. For GPG signatures and more security process information, see https://docs.djangoproject.com/en/dev/internals/security/.

To report bugs or request new features, please open a new GitHub issue.

This repository is part of the Channels project. For the shepherd and maintenance team, please see the main Channels readme.

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Django Channels HTTP/WebSocket server

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How to use Django with Daphne¶

Daphne is a pure-Python ASGI server for UNIX, maintained by members of the Django project. It acts as the reference server for ASGI.

Installing Daphne¶

You can install Daphne with pip :

python -m pip install daphne

Running Django in Daphne¶

When Daphne is installed, a daphne command is available which starts the Daphne server process. At its simplest, Daphne needs to be called with the location of a module containing an ASGI application object, followed by what the application is called (separated by a colon).

For a typical Django project, invoking Daphne would look like:

daphne myproject.asgi:application

This will start one process listening on 127.0.0.1:8000 . It requires that your project be on the Python path; to ensure that run this command from the same directory as your manage.py file.

Integration with runserver ¶

Daphne provides a runserver command to serve your site under ASGI during development.

This can be enabled by adding daphne to the start of your INSTALLED_APPS and adding an ASGI_APPLICATION setting pointing to your ASGI application object:

INSTALLED_APPS = [ "daphne", . , ] ASGI_APPLICATION = "myproject.asgi.application" 

Additional Information

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Как использовать Django с Дафни.

Daphne — это чистый Python ASGI-сервер для UNIX, поддерживаемый участниками проекта Django. Он выступает в качестве эталонного сервера для ASGI.

Installing Daphne

Вы можете установить Дафну с помощью pip :

python -m pip install daphne

Бегущий Джанго в Дафне

Когда Daphne установлена, доступна команда daphne , которая запускает процесс сервера Daphne. В самом простом случае Daphne нужно вызывать с местоположением модуля, содержащего объект приложения ASGI, за которым следует имя приложения (разделенное двоеточием).

Для типичного проекта Django обращение к Дафне выглядело бы так:

daphne myproject.asgi:application

Это запустит процесс прослушивания 127.0.0.1:8000 . Это требует, чтобы ваш проект был на пути Python; чтобы эта команда запускалась из того же каталога, что и ваш файл manage.py .

Django 4.1

Если вы пишете пользовательский фильтр,который работает с объектами времени даты,вы обычно регистрируетесь с флагом expects_localtime,установленным True:Когда этот флаг установлен,если

Второй шаг в написании пользовательских тегов — определение подкласса Node, который имеет метод render().

Hypercorn-это ASGI-сервер,который поддерживает HTTP/1,HTTP/2 и HTTP/3 с акцентом на протокол Вы можете установить Hypercorn с помощью pip:Когда Hypercorn установлен,

Помимо WSGI,Django также поддерживает развертывание на ASGI,развивающемся стандарте Python для асинхронных приложений веб-серверов.

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