使用Django和Flask获取访问来源referrer

request.referrer  # 来路
request.headers.get('User-Agent')  # 请求头

request.META['HTTP_REFERER']  # 来路
request.META.get("HTTP_USER_AGENT")  # 请求头

@app.route('/foo')
def foo():
return '<h1>Foo page </h1><a href="%s" rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow" >Do something</a>' %url_for('do_something')
@app.route('/bar')
def bar():
return '<h1>Bar page</h1><a href="%s" rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow" >Do something </a>' % url_for('do_something')
@app.route('/do_something')
def do_something():
return redirect(url_for('hello'))
@app.route('/hello')
def hello():
name = request.args.get('name')
if name is None:
name = request.cookies.get('name','xiaxiaoxu')#从cookie中获取name值
response = '<h1>Hello, %s</h1>' % name
return response
if __name__ == '__main__':
app.run(debug = True)

@app.route('/do_something')
def do_something():
return redirect(request.referrer)

return redirect(request.referrer or url_for('hello'))

def bar():
#print dir(request)
print "request.full_path:",request.full_path
#print "request.url:",request.url
return '<h1>Bar page</h1><a href="%s" rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow" >Do something and redirect </a>' % url_for('do_something', next = request.full_path)
@app.route('/do_something')
def do_something():
return redirect(request.args.get('next'))

return redirect(request.args.get('next', url_for('hello')))

@app.route('/bar')
def bar():
print "request.full_path:",request.full_path
return '<h1>Bar page</h1><a href="%s" rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow" >Do something and redirect </a>' % url_for('do_something', next = request.full_path)
def redirect_back(default = 'hello',**kwargs):
for target in request.args.get('next'),request.referrer:
if target:
return redirect(target)
return redirect(url_for(default,**kwargs))
@app.route('/do_something_and_redirect')
def do_something():
return redirect_back()
if __name__ == '__main__':
app.run(debug = True)