Heroku Python App 成功构建，但执行不成功，打开应用程序抛出错误

Question

我最近成功部署了一个 Heroku 应用程序（查看下面的日志了解详细信息），但是当我尝试通过浏览器访问我的应用程序时，它返回 An error occurred in the application and your page could not be served. If you are the application owner, check your logs for details. You can do this from the Heroku CLI with the command heroku logs --tail。此外，我的应用适用于 Discord.Py 机器人，而该机器人并没有像应有的那样在线。

日志：

-----> Building on the Heroku-20 stack
-----> Using buildpack: heroku/python
-----> Python app detected
-----> No Python version was specified. Using the same version as the last build: python-3.9.9
       To use a different version, see: https://devcenter.heroku.com/articles/python-runtimes
-----> Requirements file has been changed, clearing cached dependencies
-----> Installing python-3.9.9
-----> Installing pip 21.3.1, setuptools 57.5.0 and wheel 0.37.0
-----> Installing SQLite3
-----> Installing requirements with pip
       Collecting discord.py==1.6.0
         Downloading discord.py-1.6.0-py3-none-any.whl (779 kB)
       Collecting Flask==2.0.2
         Downloading Flask-2.0.2-py3-none-any.whl (95 kB)
       Collecting dnspython==1.16.0
         Downloading dnspython-1.16.0-py2.py3-none-any.whl (188 kB)
       Collecting PyNaCl==1.3.0
         Downloading PyNaCl-1.3.0-cp34-abi3-manylinux1_x86_64.whl (759 kB)
       Collecting async-timeout==3.0.1
         Downloading async_timeout-3.0.1-py3-none-any.whl (8.2 kB)
       Collecting aiohttp<3.8.0,>=3.6.0
         Downloading aiohttp-3.7.4.post0-cp39-cp39-manylinux2014_x86_64.whl (1.4 MB)
       Collecting Jinja2>=3.0
         Downloading Jinja2-3.0.3-py3-none-any.whl (133 kB)
       Collecting itsdangerous>=2.0
         Downloading itsdangerous-2.0.1-py3-none-any.whl (18 kB)
       Collecting Werkzeug>=2.0
         Downloading Werkzeug-2.0.2-py3-none-any.whl (288 kB)
       Collecting click>=7.1.2
         Downloading click-8.0.3-py3-none-any.whl (97 kB)
       Collecting cffi>=1.4.1
         Downloading cffi-1.15.0-cp39-cp39-manylinux_2_12_x86_64.manylinux2010_x86_64.whl (444 kB)
       Collecting six
         Downloading six-1.16.0-py2.py3-none-any.whl (11 kB)
       Collecting yarl<2.0,>=1.0
         Downloading yarl-1.7.2-cp39-cp39-manylinux_2_5_x86_64.manylinux1_x86_64.manylinux_2_12_x86_64.manylinux2010_x86_64.whl (304 kB)
       Collecting attrs>=17.3.0
         Downloading attrs-21.4.0-py2.py3-none-any.whl (60 kB)
       Collecting chardet<5.0,>=2.0
         Downloading chardet-4.0.0-py2.py3-none-any.whl (178 kB)
       Collecting typing-extensions>=3.6.5
         Downloading typing_extensions-4.0.1-py3-none-any.whl (22 kB)
       Collecting multidict<7.0,>=4.5
         Downloading multidict-5.2.0-cp39-cp39-manylinux_2_5_x86_64.manylinux1_x86_64.manylinux_2_12_x86_64.manylinux2010_x86_64.whl (174 kB)
       Collecting pycparser
         Downloading pycparser-2.21-py2.py3-none-any.whl (118 kB)
       Collecting MarkupSafe>=2.0
         Downloading MarkupSafe-2.0.1-cp39-cp39-manylinux_2_5_x86_64.manylinux1_x86_64.manylinux_2_12_x86_64.manylinux2010_x86_64.whl (30 kB)
       Collecting idna>=2.0
         Downloading idna-3.3-py3-none-any.whl (61 kB)
       Installing collected packages: multidict, idna, yarl, typing-extensions, pycparser, MarkupSafe, chardet, attrs, async-timeout, Werkzeug, six, Jinja2, itsdangerous, click, cffi, aiohttp, PyNaCl, Flask, dnspython, discord.py
       Successfully installed Flask-2.0.2 Jinja2-3.0.3 MarkupSafe-2.0.1 PyNaCl-1.3.0 Werkzeug-2.0.2 aiohttp-3.7.4.post0 async-timeout-3.0.1 attrs-21.4.0 cffi-1.15.0 chardet-4.0.0 click-8.0.3 discord.py-1.6.0 dnspython-1.16.0 idna-3.3 itsdangerous-2.0.1 multidict-5.2.0 pycparser-2.21 six-1.16.0 typing-extensions-4.0.1 yarl-1.7.2
-----> Discovering process types
       Procfile declares types -> worker
-----> Compressing...
       Done: 62M
-----> Launching...
       Released v5
       https://app.herokuapp.com/ deployed to Heroku

Answer 1

您的应用程序是一个工作程序 (Procfile declares types -> worker)，因此它会响应 HTTP 请求。

更改为 web 并确保绑定 Heroku 提供的 PORT。

BTW BOT 如果轮询服务器以获取消息/更新，则可以作为工作人员运行（无需处理传入请求）。这也是一个可行的选择（将其保留为 worker），但要确保 BOT 记录它在启动时所做的事情。