def fetch_next(request):
if request.method=='GET':
from_username=request.GET.get('from','0').encode('ascii')
user_dict=kv.get(from_username)
rt,total_nums,current_page,total_page=query_library(user_dict['key_word'],'title',user_dict['current_page']+1)
user_dict.update({'rt':rt,'current_page':current_page,'next':0})
kv.replace(from_username,user_dict)
return HttpResponse('done')
def index(request):
if request.method=='POST':
if verify_source(request.GET): #检查请求来源是否合法
x_dict=convert_xml_to_dict(request)
from_username=x_dict['FromUserName']
content=x_dict['Content'].strip()
if content != '1': #发送来的内容不是'1'（‘1’请求下一页），即为查询关键字
kv.delete(from_username) #remove kv user_dict
rt,total_nums,current_page,total_page=query_library(content,'title','1')
sub_rt=rt[0:9] #display 9 items on weixin
len_sub_rt=len(sub_rt)
if len_sub_rt == 9: #图书子结果是否等于9
if len(rt) > 9: #如果查询图书结果大于9条，则保存
user_dict={'rt':rt,
'next':9,
'current_page':current_page,
'total_page':total_page,
'total_nums':total_nums,
'key_word':content
}
kv.set(from_username,user_dict) #save
article_count='10'
title=u'查询关键字:%s 结果数:%s' %(content,total_nums)
elif 0<len_sub_rt<9: #图书结果大于0，小于9
article_count=len_sub_rt+2
title=u'查询关键字:%s 结果数:%s' %(content,total_nums)
else: #无图书查询结果
article_count='1'
title=u'查询关键字:%s 结果数:%s' %(content,total_nums)
description=u'没有您要检索的馆藏书目！'
else: #查询下一页
user_dict=kv.get(from_username)
if user_dict:
_next=user_dict['next']
sub_rt=user_dict['rt'][_next:_next+9]
user_dict['next']+=9
kv.replace(from_username,user_dict)
len_sub_rt=len(sub_rt)
if len_sub_rt == 9: #the number of response items about books is 45
article_count='10'
title=u'查询关键字:%s 结果数:%s' %(user_dict['key_word'],user_dict['total_nums'])
if sub_rt[-1] == user_dict['rt'][-1]: #when go to the end index
if user_dict['current_page'] != user_dict['total_page']:
add_task(user_dict,'/task/',from_username) # add task to sae queue to fetch next page
else:
kv.delete(from_username) #if go to the end page delete user_dict,
else:
article_count=len_sub_rt+2
title=u'查询关键字:%s 结果数:%s' %(user_dict['key_word'],user_dict['total_nums'])
sub_rt=user_dict['rt'][_next:]
kv.delete(from_username) #remove kv user_dict
else:
article_count='1'
title=u'没有更多的数据或查询下一页已过期' #return 'no more data'or'query outdate'
create_time=str(int(time()))
t=template.loader.get_template('news_response.xml')
c=template.Context(locals())
xml=t.render(c)
return HttpResponse(xml,content_type='application/xml')
else:
return HttpResponse('False')
else:
return HttpResponse('False')
