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Flask Web项目开发阶段一般是在本地计算机进行调试,基本步骤如下:
* 入口文件(通常为app.py)中写入app.run()函数;
* 控制台终端启动工程所需的虚拟环境(包含Flask及工程依赖的其它第三方库);
* 在虚拟环境下,切换到入口文件所在目录;
* 运行命令:python app.py或flask run(若使用该命令,入口文件必须命名为app.py,否则需要事先使用set
FLASK_APP命令指定入口文件名),启动Flask Web服务,运行项目;
* 在本地浏览器中输入127.0.0.1:5000/[内部URL]访问相应的页面。
一般执行上述1~4步后,在远程计算器的浏览器中输入X.X.X.X:5000/[内部URL]通常无法访问页面(其中X.X.X.X
为本地计算机IP)。实现远程访问需要显式配置app.run()的host参数,即app.run(host="0.0.0.0")
,然后配置本地计算机防火墙的入站规则,加入5000端口(可以先关闭防火墙进行测试,但不推荐长期保持这种方式实现远程访问)。如果在第4步中使用flask run
命令启动服务器,则必须在命令中直接指定host参数,即flask run --host=0.0.0.0,效果是一样的。