wzbapi/src/common/common_control.py

# coding:utf-8
import os,time,datetime
import sys
import django
import json
#from django.core.cache import cache
from django.core.paginator import Paginator
from django.conf import settings
from django_redis import get_redis_connection

import common.models as cm
import common.common_functions as ccf

cache = get_redis_connection('data')
pl = cache.pipeline() 

class CusJSONEncoder(json.JSONEncoder):
    """
    JSONEncoder subclass that knows how to encode date/time, decimal types and UUIDs.
    """
    def default(self, o):
        # See "Date Time String Format" in the ECMA-262 specification.
        if isinstance(o, datetime.datetime):
            r = datetime.datetime.strftime(o,'%Y-%m-%d %H:%M:%S')
            return r
        elif isinstance(o, datetime.date):
            return o.isoformat()
        elif isinstance(o, datetime.time):
            if is_aware(o):
                raise ValueError("JSON can't represent timezone-aware times.")
            r = o.isoformat()
            if o.microsecond:
                r = r[:12]
            return r
        elif isinstance(o, datetime.timedelta):
            return duration_iso_string(o)
        elif isinstance(o, decimal.Decimal):
            return str(o)
        elif isinstance(o, uuid.UUID):
            return str(o)
        else:
            return super(JSONEncoder, self).default(o)

def cache_data(timeout=60*60):
    def _wrapper(func):
        def __wrapper(*args,**kwargs):
            if args:
                key = "cdata_{}_{}".format(func.__name__,str(args))
            else:
                key = "cdata_{}".format(func.__name__)
            #if not kwargs.get("cache",True) or not cache.get(key):
            if not cache.get(key):
                res = func(*args,**kwargs)
                if res:
                    cache.set(key,json.dumps(res,cls=CusJSONEncoder),timeout)
                #print u"不取缓存!!!!!!!!!"
                return res
            else:
                #print u"取缓存"
                res = cache.get(key)
                return json.loads(res) if res else {}
        return __wrapper
    return _wrapper


def no_cache(key="*"):
    def _wrapper(func):
        def __wrapper(*args,**kwargs):
            res = func(*args,**kwargs)
            print 999999999999999
            print cache.delete_pattern("cdata_{}*".format(key))
            return res
        return __wrapper
    return _wrapper


def no_cache_list(keys=[]):
    def _wrapper(func):
        def __wrapper(*args,**kwargs):
            res = func(*args,**kwargs)
            for key in keys:
                print cache.delete_pattern("cdata_{}*".format(key))
            return res
        return __wrapper
    return _wrapper

def del_cache(key):
    """
    """
    print cache.delete(key)

def get_page_qset(qset,page,page_size=20):
    """
    """
    count = qset.count()
    if page and page_size:
        paginator = Paginator(qset,page_size)
        object_list = paginator.page(page).object_list
    else:
        object_list = qset
    return count,object_list

def upload_file(request):
    """
    """
    upload_file = request.FILES['file']
    ext = os.path.splitext(upload_file.name)[-1]
    timestamp = str(int(time.time()*1000))
    #dest = settings.STATIC_ROOT + "/upload/"+str(int(time.time()*1000)) + upload_file.name
    dest = settings.STATIC_ROOT + "/upload/"+ timestamp + ext
    with open(dest,"wb+") as f:
        for chunk in upload_file.chunks():
            f.write(chunk)
    f.close()
    url = dest.replace(settings.STATIC_ROOT,settings.HOST)
    rst = {"url":url,"type":request.POST.get("type"),"name":upload_file.name}
    #
    if ext == ".mp4":
        imgpath = settings.STATIC_ROOT + "/upload/" + timestamp + ".png"
        cmd = "ffmpeg  -i {}  -ss 1.000 -vframes 1 {}".format(dest,imgpath)
        os.system(cmd)
        imgurl = imgpath.replace(settings.STATIC_ROOT,settings.HOST)
        rst["imgurl"] = imgurl
    return rst


if __name__ == "__main__":
    #测试
    print get_pparents_info(1550,[])