Flask函数url_for不适用于Bluehost上的子域部署 [英] Flask function url_for doesn't work for sub-domain deployment on Bluehost
问题描述
from flask import Flask
app = Flask(__ name__)
@ app.route('/',methods = ['GET'])
def home():
return'Hello世界'
if __name__ ==__main__:
app.run()
但是,由于我引入了一个简单的登录功能,因此doc结构和index.py看起来像这样:
doc结构:
public_html
| --app
| - 。htaccess
| --index.fcgi
| --index.py
| --static
| --login.html
| --templates
| --home.html
index.py:
from flask import Flask,url_for,request,render_template,redirect,session $ b $ app = Flask(__ name__)
app.route('/',methods = ['GET'] )
def home():
如果不是session.get('user'):
返回重定向(url_for('login'))#go登录页面如果没有登录
else:
return render_template('home.html')#otherwise转到主页
@ app.route('/ login',methods = ['GET','POST' ])
def login():$ b $如果request.method =='GET':
返回app.send_static_file('login.html')
else:
user = request.form.get('user')
password = request.form.get('password')
if user =='joy'and password =='joy':
session ['user'] = user
return render_template('home.html')
else:
return'LOGIN FAILED'
if __name__ == __main__:
app.run()
/ app导致example.com/login更改的URL和一个合理的404错误example.com/login不会映射到任何文档。
$ b
return redirect(url_for('login'))
url_for('login')返回example.com/login而不是example.com/app/login 。这就是为什么index.py的后一个版本不起作用。我尝试了很多东西,但没有遇到任何问题。请帮忙。谢谢!
我的.htaccess:
选项+ ExecCGI
AddHandler fcgid-script .fcgi
RewriteEngine On
#RewriteBase / app /#RewriteBase / or RewriteBase / app / work
RewriteCond%{REQUEST_FILENAME}!-f
RewriteRule ^(。*)$ index.fcgi / $ 1 [QSA,L]
我的index.fcgi:
import sys
sys.path.insert(0,'/ path_to_my_python_site-packages')
from flup.server.fcgi从索引导入WSGIServer
导入应用程序
$ b $ class ScriptNameStripper(object):
def __init __(self,app):
self .app = app
$ b $ def __call __(self,environ,start_response):
environ ['SCRIPT_NAME'] =''
返回self.app(environ,start_response)
app = ScriptNameStripper(app)
$ b $ if if __name__ =='__main__':
WSGIServer(app).run()
以下现在为我工作。
-
注释.htaccess中的RewriteBase
.py用自定义的url_for
from flask import烧瓶,重定向,url_for
$ b $ app =烧瓶__name__)
$ b $ def strip_url(orig):
return orig.replace('index.fcgi /','')
@ app.route('/ ',方法= ['GET'])
def home():
返回重定向(strip_url(url_for('login')))
@ app.route(' / login',methods = ['GET'])
def login():
返回'please login'
if __name__ ==__main__:
app.run()
我想说官方的 Flask fastcgi docs 需要一个RewriteRule来从网址中删除***。fcgi不起作用的重定向从代码内启动。
I deployed a very simple Flask application called 'app' in a sub directory under root directory in Bluehost. Hopefully, example.com points to the homepage and example.com/app points to my Flask application. Actually, the Flask application works pretty fine when the script index.py looks like:
from flask import Flask
app = Flask(__name__)
@app.route('/', methods=['GET'])
def home():
return 'Hello world'
if __name__ == "__main__":
app.run()
But things went bad as I introduced a simple login functionality, with the doc structure and index.py look like:
doc structure:
public_html
|--app
|--.htaccess
|--index.fcgi
|--index.py
|--static
|--login.html
|--templates
|--home.html
index.py:
from flask import Flask, url_for, request, render_template, redirect, session
app = Flask(__name__)
@app.route('/', methods=['GET'])
def home():
if not session.get('user'):
return redirect(url_for('login')) #go to login page if not logined
else:
return render_template('home.html') #otherwise go to home page
@app.route('/login', methods=['GET', 'POST'])
def login():
if request.method == 'GET':
return app.send_static_file('login.html')
else:
user = request.form.get('user')
password = request.form.get('password')
if user == 'joy' and password == 'joy':
session['user'] = user
return render_template('home.html')
else:
return 'LOGIN FAILED'
if __name__ == "__main__":
app.run()
However, accessing example.com/app led to a changed URL as example.com/login and a reasonable 404 error as example.com/login doesn't map to any document.
return redirect(url_for('login'))
The url_for('login') return example.com/login instead of example.com/app/login. That's why the latter version of index.py doesn't work. I tried so many things but didn't came across any fix. Please help. THanks!
My .htaccess:
Options +ExecCGI
AddHandler fcgid-script .fcgi
RewriteEngine On
#RewriteBase /app/ # Neither RewriteBase / or RewriteBase /app/ work
RewriteCond %{REQUEST_FILENAME} !-f
RewriteRule ^(.*)$ index.fcgi/$1 [QSA,L]
My index.fcgi:
import sys
sys.path.insert(0, '/path_to_my_python_site-packages')
from flup.server.fcgi import WSGIServer
from index import app
class ScriptNameStripper(object):
def __init__(self, app):
self.app = app
def __call__(self, environ, start_response):
environ['SCRIPT_NAME'] = ''
return self.app(environ, start_response)
app = ScriptNameStripper(app)
if __name__ == '__main__':
WSGIServer(app).run()
The following works for me now.
Comment RewriteBase in .htaccess
Updated index.py with a customized url_for
from flask import Flask, redirect, url_for app = Flask(__name__) def strip_url(orig): return orig.replace('index.fcgi/', '') @app.route('/', methods=['GET']) def home(): return redirect(strip_url(url_for('login'))) @app.route('/login', methods=['GET']) def login(): return 'please login' if __name__ == "__main__": app.run()
If a conclusion has to be made, I would like say official Flask fastcgi docs demands a RewriteRule to remove the ***.fcgi from the url which doesn't work for redirect initiated from within code.
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