我目前正在学习Flask.
使用jQuery通过$.ajax()发送数据后,键入=’post’,当我检查request.method时,服务器端出错. type =’get’也是如此.
builtins.ValueError
ValueError: View function did not return a response
Traceback (most recent call last)
File "C:\Python33\lib\site-packages\flask\app.py",line 1836,in __call__
return self.wsgi_app(environ,start_response)
File "C:\Python33\lib\site-packages\flask\app.py",line 1820,in wsgi_app
response = self.make_response(self.handle_exception(e))
File "C:\Python33\lib\site-packages\flask\app.py",line 1403,in handle_exception
reraise(exc_type,exc_value,tb)
File "C:\Python33\lib\site-packages\flask\_compat.py",line 33,in reraise
raise value
File "C:\Python33\lib\site-packages\flask\app.py",line 1817,in wsgi_app
response = self.full_dispatch_request()
File "C:\Python33\lib\site-packages\flask\app.py",line 1478,in full_dispatch_request
response = self.make_response(rv)
File "C:\Python33\lib\site-packages\flask\app.py",line 1566,in make_response
raise ValueError('View function did not return a response')
ValueError: View function did not return a response
python代码
if request.method=='psot': #**Error occur when i check**
req = request.get_json()
ck=query_db("select * from users where username=?",[req['u']])
if ck:
if check_password_hash(ck[0]['password'],req['p']):
session['username']=req['u']
return jsonify({'result':'1234'})
else:
return jsonify({'result':'noo'})
else:
return jsonify({'result':'noo'})
jQuery的
$.ajax({
type:'post',contentType: 'application/json',url:"/login",data:JSON.stringify({'u':luser.val(),'p':lpass.val()}),dataType:'json',success:function(data)
{
if(data.result=='1234')
{
window.location.href='/profile';
}
else
{
$('#log3s').html('username or password not correct').css('color','red');
return false;
}
}
});
解决方法
您需要确保使用正确的方法注册视图路径：
@app.route('/login',methods=['GET','POST'])
允许GET和POST请求,或使用：
@app.route('/login',methods=['POST'])
仅允许此路线的POST.
要测试请求方法,请使用大写文本进行测试：
if request.method == 'POST':
但请确保您始终返回回复.如果request.method不等于’POST’,你仍然需要返回valid response.
