Django:避免端口8000 (runserver)的冲突

Question

我立刻开发了一些服务项目。

如果我运行了两次runserver，就会得到以下错误：

System check identified no issues (0 silenced).
September 10, 2021 - 10:44:26
Django version 3.1.4, using settings 'mysite.settings'
Starting development server at http://127.0.0.1:8000/
Quit the server with CONTROL-C.
Error: That port is already in use.

我知道我可以手动提供不同的端口，但是更自动的方法会更好。

如果不手动为每个项目手工分配一个端口，我如何解决这个冲突？

我的笔记本电脑上有50多个系统，我不想用手给每个系统一个端口号。

Answer 1

您可以实现如下内容。

settings.py中的

1. 添加RUN_SERVER_PORT

RUN_SERVER_PORT = 8080

在manage.py中

1. 实现了以下代码

#!/usr/bin/env python
"""Django's command-line utility for administrative tasks."""
import os
import sys
from django.core.management.commands.runserver import Command as runserver
from django.conf import settings


def main():
    """Run administrative tasks."""
    os.environ.setdefault('DJANGO_SETTINGS_MODULE', 'accountant.settings')
    try:
        from django.core.management import execute_from_command_line
    except ImportError as exc:
        raise ImportError(
            "Couldn't import Django. Are you sure it's installed and "
            "available on your PYTHONPATH environment variable? Did you "
            "forget to activate a virtual environment?"
        ) from exc
    runserver.default_port = settings.RUN_SERVER_PORT
    execute_from_command_line(sys.argv)


if __name__ == '__main__':
    main()

工作证明：

python manage.py runserver

Watching for file changes with StatReloader
Performing system checks...

System check identified no issues (0 silenced).
September 19, 2021 - 12:47:59
Django version 3.2.6, using settings 'accountant.settings'
Starting development server at http://127.0.0.1:8080/
Quit the server with CONTROL-C.

您可以使用RUN_SERVER_PORT中的任何可用端口

Answer 2

您可以创建自己的管理命令runsever_foo。

然后可以从settings.py或os.environ获取端口的默认值。

Answer 3

参考这篇文章：https://stackoverflow.com/a/38319452/16936785

为了进行随机端口选择，我建议将manage.py下的服务器端口修改为如下：

import random
from django.core.management.commands.runserver import Command
port_number = random.randint(8000, 8888)
Command.default_port = str(port_number)