Django API：输出文件 提供下载

Piston写的Handler：

1. 简历j_handler类，继承Piston的BaseHandler。

2. model为文件的model

3. def 方法def read(self,request,sub_module)

4. 处理（公司内部文件，不贴了）

5. 提供文件下载：

View Code

data=json.dumps(li,indent=4,sort_keys=True) 
response = HttpResponse(data,mimetype='application/octet-stream') 
response['Content-Disposition'] = 'attachment; filename=%s' % "Vieri.json"
return response

 

Piston写的Authentication：

1. 在urls.py里操作

2. from piston.authentication import HttpBasicAuthentication

3. 基本的Authentication

auth = HttpBasicAuthentication(realm="Download report")
authhandler = Resource(j_handler, authentication=auth)

4. 将authhandler整合到url中

 

Piston写的防止Csrf Authentication：

代码：

View Code

 

用Piston写的handler，resource只是一个类，定义的方法何时call取决于用户请求

Piston lets you map resource to models, and by doing so, it will do a lot of the heavy lifting for you.

A resource can be just a class, but usually you would want to define at least 1 of 4 methods:

read is called on GET requests, and should never modify data (idempotent.)

create is called on POST, and creates new objects, and should return them (or rc.CREATED.)

update is called on PUT, and should update an existing product and return them (or rc.ALL_OK.)

delete is called on DELETE, and should delete an existing object. Should not return anything, just rc.DELETED.

handler 基本代码：

View Code

from piston.handler import BaseHandler
from myapp.models import Blogpost

class BlogpostHandler(BaseHandler):
   allowed_methods = ('GET',)
   model = Blogpost   

   def read(self, request, post_slug):
      ...

mapping到urls.py

View Code

from django.conf.urls.defaults import *
from piston.resource import Resource
from mysite.myapp.api.handlers import BlogpostHandler

blogpost_handler = Resource(BlogpostHandler)

urlpatterns = patterns('',
   url(r'^blogpost/(?P<post_slug>[^/]+)/', blogpost_handler),
   url(r'^blogposts/', blogpost_handler),
)

https://bitbucket.org/jespern/django-piston/wiki/Documentation#!resources

https://bitbucket.org/jespern/django-piston/wiki/Documentation#!mapping-urls

 

 

class CsrfExemptResource( Resource ):
    def __init__( self, handler, authentication = None ):
        super( CsrfExemptResource, self ).__init__( handler, authentication )
        self.csrf_exempt = getattr( self.handler, 'csrf_exempt', True )
handler = CsrfExemptResource( j_handler)