在页面的 Heroku return HTML 上托管 Flask API

Question

当我尝试在 Heroku 上托管 Flask API 时，我在部署日志中没有收到任何错误（它甚至说“构建成功”），但是当我尝试执行 POST 请求，我只是得到页面的 HTML 而不是 JSON 数据。

它在本地主机上工作正常，问题只发生在 Heroku 上。由于服务器位于文件夹中而不是存储库的根目录中，因此我必须创建一个仅包含服务器文件的分支（称为 Heroku）。

端口有问题吗？

我要访问的路由：

@app.route('/api/model', methods = ["POST"])
def model():
  try:
    data = request.get_json()
    print(f"Received model: {data}")

    # `model_func()` is a function that returns a dictionary
    return jsonify(model_func(data)) 

  except:
    print("Model didn't work")


if __name__ == "__main__":
  app.run(host='localhost', port=os.environ.get('PORT'))

我如何访问它（邮递员）：

Heroku 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-3.9.5
       To use a different version, see: https://devcenter.heroku.com/articles/python-runtimes
-----> Requirements file has been changed, clearing cached dependencies
-----> Installing python-3.9.5
-----> Installing pip 20.2.4, setuptools 47.1.1 and wheel 0.36.2
-----> Installing SQLite3
-----> Installing requirements with pip
       Collecting Flask==2.0.0
         Downloading Flask-2.0.0-py3-none-any.whl (93 kB)
       Collecting Flask-Cors==3.0.10
         Downloading Flask_Cors-3.0.10-py2.py3-none-any.whl (14 kB)
       Collecting requests==2.22.0
         Downloading requests-2.22.0-py2.py3-none-any.whl (57 kB)
       Collecting eventlet==0.31.0
         Downloading eventlet-0.31.0-py2.py3-none-any.whl (224 kB)
       Collecting asyncio==3.4.3
         Downloading asyncio-3.4.3-py3-none-any.whl (101 kB)
       Collecting python-dotenv==0.17.1
         Downloading python_dotenv-0.17.1-py2.py3-none-any.whl (18 kB)
       Collecting numpy==1.20.3
         Downloading numpy-1.20.3-cp39-cp39-manylinux_2_12_x86_64.manylinux2010_x86_64.whl (15.4 MB)
       Collecting scipy==1.6.3
         Downloading scipy-1.6.3-cp39-cp39-manylinux1_x86_64.whl (27.3 MB)
       Collecting Werkzeug>=2.0
         Downloading Werkzeug-2.0.1-py3-none-any.whl (288 kB)
       Collecting itsdangerous>=2.0
         Downloading itsdangerous-2.0.1-py3-none-any.whl (18 kB)
       Collecting click>=7.1.2
         Downloading click-8.0.1-py3-none-any.whl (97 kB)
       Collecting Jinja2>=3.0
         Downloading Jinja2-3.0.1-py3-none-any.whl (133 kB)
       Collecting Six
         Downloading six-1.16.0-py2.py3-none-any.whl (11 kB)
       Collecting certifi>=2017.4.17
         Downloading certifi-2021.5.30-py2.py3-none-any.whl (145 kB)
       Collecting idna<2.9,>=2.5
         Downloading idna-2.8-py2.py3-none-any.whl (58 kB)
       Collecting urllib3!=1.25.0,!=1.25.1,<1.26,>=1.21.1
         Downloading urllib3-1.25.11-py2.py3-none-any.whl (127 kB)
       Collecting chardet<3.1.0,>=3.0.2
         Downloading chardet-3.0.4-py2.py3-none-any.whl (133 kB)
       Collecting greenlet>=0.3
         Downloading greenlet-1.1.0-cp39-cp39-manylinux_2_17_x86_64.manylinux2014_x86_64.whl (162 kB)
       Collecting dnspython<2.0.0,>=1.15.0
         Downloading dnspython-1.16.0-py2.py3-none-any.whl (188 kB)
       Collecting MarkupSafe>=2.0
         Downloading MarkupSafe-2.0.1-cp39-cp39-manylinux2010_x86_64.whl (30 kB)
       Installing collected packages: Werkzeug, itsdangerous, click, MarkupSafe, Jinja2, Flask, Six, Flask-Cors, certifi, idna, urllib3, chardet, requests, greenlet, dnspython, eventlet, asyncio, python-dotenv, numpy, scipy
       Successfully installed Flask-2.0.0 Flask-Cors-3.0.10 Jinja2-3.0.1 MarkupSafe-2.0.1 Six-1.16.0 Werkzeug-2.0.1 asyncio-3.4.3 certifi-2021.5.30 chardet-3.0.4 click-8.0.1 dnspython-1.16.0 eventlet-0.31.0 greenlet-1.1.0 idna-2.8 itsdangerous-2.0.1 numpy-1.20.3 python-dotenv-0.17.1 requests-2.22.0 scipy-1.6.3 urllib3-1.25.11
-----> Discovering process types
       Procfile declares types -> (none)
-----> Compressing...
       Done: 100.2M
-----> Launching...
       Released v18
       https://pid-tuner-condig.herokuapp.com/ deployed to Heroku

URL 的 Heroku API: https://pid-tuner-condig.herokuapp.com/

URL 用于 GitHub 存储库： https://github.com/pmorim/pid-tuner/tree/heroku

Answer 1

您收到页面的 HTML 是因为您网站的服务器配置似乎有问题。当您打开网站的 link 时，您可以看到 heroku 显示应用程序错误来指示这一点。你有没有制作procfile？

在页面的 Heroku return HTML 上托管 Flask API

Hosting Flask API on Heroku return HTML of page

python

heroku

flask