[python]pyramid 学习4 (views)

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　　Defining a View Callable as a Function



from pyramid.response import Response
def hello_world(request):
    return Response('Hello world!')
　　
　　Defining a View Callable as a Class



from pyramid.response import Response
class MyView(object):
    def __init__(self, request):
        self.request = request
    def __call__(self):
        return Response('hello')
　　
　　HTTP异常 (pyramid.httpexceptions)
　　抛出401的第一种方法



from pyramid.httpexceptions import HTTPUnauthorized
def aview(request):
    raise HTTPUnauthorized()
　　抛出401的第二种方法



from pyramid.httpexceptions import exception_response
def aview(request):
    raise exception_response(401)
　　



403
pyramid.httpexceptions.HTTPForbidden.
404
pyramid.httpexceptions.HTTPNotFound
　　
　　自定义异常



class ValidationFailure(Exception):
    def __init__(self, msg):
        self.msg = msg
from pyramid.view import view_config
from helloworld.exceptions import ValidationFailure
@view_config(context=ValidationFailure)
def failed_validation(exc, request):
    response =  Response('Failed validation: %s' % exc.msg)
    response.status_int = 500
    return response
　　
　　header重定向



from pyramid.httpexceptions import HTTPFound
def myview(request):
    return HTTPFound(location='http://example.com')
　　
　　获取POST数据



def myview(request):
    firstname = request.params['firstname']
    lastname = request.params['lastname']
def myview(request):
    # the .decode('utf-8') will break below if there are any high-order
    # characters in the firstname or lastname
    firstname = request.params['firstname'].decode('utf-8')
    lastname = request.params['lastname'].decode('utf-8')
　　
　　复习一下 route中获取数据(GET)



request.matchdict['xxxx']