Python 无法解释的 Flask 404 错误
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Unexplainable Flask 404 errors
提问by Jasmijn
I have a website that uses Flask. It used to work well, but since recently, every request returns a 404, and it seems it can't find the right endpoints. However:
我有一个使用 Flask 的网站。它曾经运行良好，但从最近开始，每个请求都返回 404，并且似乎找不到正确的端点。然而：
- Locally, the site still works, only on my VPS it shows this strange behaviour.
url_forworks andapp.view_functionscontains all the routes as well.- And yet, I keep getting 404s on the VPS, even for
/and anything under/static/.
- 在本地，该站点仍然有效，只有在我的 VPS 上它才显示出这种奇怪的行为。
url_for有效并app.view_functions包含所有路线。- 然而，我一直在VPS得到404，即使是
/下什么/static/。
Here's part of the code, it's a bit much to show all of it and it's not all relevant:
这是代码的一部分，显示所有内容有点多，并不是全部相关：
#snip
from flask import Flask, render_template, abort, request, redirect, url_for, session
from flask.ext.babelex import Babel
from flask.ext import babelex
#snip
app = Flask(__name__)
app.secret_key = #snip
#snip
#just one of the routes
@app.route('/')
def about():
return render_template('about.html')
#snip
@app.errorhandler(404)
def page_not_found(e):
#snip
return render_template('404.html'), 404
#snip
if __name__ == '__main__':
app.run(debug=True)
else:
app.config.update(
SERVER_NAME='snip.snip.com:80',
APPLICATION_ROOT='/',
)
回答by Scott
I know this is old, but I just ran into this same problem. Yours could be any number of issues but mine was that I had commented out the from app import viewsline in my __init__.pyfile. It gave me the same symptom: every endpoint that required @app.routeand a view was responding with 404's. Static routes (.js and .css) were fine (that was my clue).
我知道这很旧，但我遇到了同样的问题。您的问题可能有很多，但我的问题是我已经注释掉了文件中的这一from app import views行__init__.py。它给了我同样的症状：需要的每个端点@app.route和视图都以 404 响应。静态路由（.js 和 .css）很好（这是我的线索）。
回答by Alexis Benoist
I had the same issue. I had it because I changed the parameters SERVER_NAMEof the config to a name which is not the name of the server.
我遇到过同样的问题。我有它是因为我SERVER_NAME将配置的参数更改为不是服务器名称的名称。
You can solve this bug by removing SERVER_NAMEfrom the config if you have it.
如果有，您可以通过SERVER_NAME从配置中删除来解决此错误。
回答by user7804097
Extremely old by this point, but mine was related to bug in importing. I'm using blueprints and I had:
在这一点上非常老，但我的与导入错误有关。我正在使用蓝图，我有：
from app.auth import bp
instead of
代替
from app.main import bp
I was importing the wrong bp/ routes
我导入了错误的 bp/ 路由
回答by Braden Holt
I received this error from defining my flask_restful route inside the create_app method. I still don't quite understand why it didn't work but once I changed the scope / moved it outside as shown below it worked.
我在 create_app 方法中定义我的flask_restful 路由时收到此错误。我仍然不太明白为什么它不起作用，但是一旦我更改了范围/将其移到外面，如下所示，它就起作用了。
from flask import Flask
from flask_restful import Resource
from extensions import db, api
from users.resources import User
def create_app():
app = Flask(__name__)
app.config.from_object('settings')
db.init_app(app)
api.init_app(app)
return app
api.add_resource(User, '/users')
回答by Alveona
Had the same issue because the following lines
有同样的问题，因为以下几行
if __name__ == '__main__':
app.run(host='127.0.0.1', threaded=True)
were declared before the function and decorator.
在函数和装饰器之前声明。
Moving these lines in the very bottom of file helped me.
在文件的最底部移动这些行对我有帮助。
