python-Django收集主机信息json格式

Control:

from django.conf.urls import patterns, include, url

from django.contrib import admin
admin.autodiscover()

urlpatterns = patterns('',
    # Examples:
    # url(r'^$', 'simplecmdb.views.home', name='home'),
    # url(r'^blog/', include('blog.urls')),

    url(r'^admin/', include(admin.site.urls)),
    url(r'^hostinfo/collect/$','hostinfo.views.collect'),
    url(r'^hostinfo/getjson/$','hostinfo.views.getjson'),
    url(r'^hostinfo/gettxt/$','hostinfo.views.gettxt'),
)

View:

from django.shortcuts import render
from django.http import HttpResponse
from hostinfo.models import Host,HostGroup
import pickle
import json

# Create your views here.

def collect(req):
    if req.POST:
        #dic = pickle.loads(req.body)
        dic = json.loads(req.body)
        hostname = dic['hostname']
        ip = dic['ip']
        product = dic['product']
        sn = dic['sn']
        vendor = dic['vendor']
        cpu_model = dic['cpu_model']
        cpu_num = dic['cpu_num']
        memory = dic['memory']
        osver = dic['osver']

        try:
            host = Host.objects.get(sn=sn)
        except:
            host = Host()
        host.hostname = hostname
        host.ip = ip
        host.product = product
        host.sn = sn
        host.vendor = vendor
        host.cpu_model = cpu_model
        host.cpu_num = cpu_num
        host.memory = memory
        host.osver = osver

        host.save()

        return HttpResponse('data have save into DB')
    else:
        return HttpResponse('there is no data from POST method')

def getjson(req):
    ret_list = []
    hg = HostGroup.objects.all()
    for g in hg:
        ret = {'groupname':g.groupname,'members':[]}
        for h in g.members.all():
            ret_h = {'hostname':h.hostname,'ip':h.ip}
            ret['members'].append(ret_h)
    ret_list.append(ret)
    return HttpResponse(json.dumps(ret_list))


def gettxt(req):
    res = ''
    hg = HostGroup.objects.all()
    for g in hg:
        groupname = g.groupname
        for h in g.members.all():
            hostname = h.hostname
            ip = h.ip
            res += groupname+' '+hostname+' '+ip+'
'
    return HttpResponse(res)

Model:

from django.db import models

# Create your models here.

class Host(models.Model):
    hostname = models.CharField(max_length=50)
    ip = models.IPAddressField()
    vendor = models.CharField(max_length=50)
    product = models.CharField(max_length=50)
    sn = models.CharField(max_length=50)
    cpu_model = models.CharField(max_length=50)
    cpu_num = models.IntegerField()
    memory = models.CharField(max_length=50)
    osver = models.CharField(max_length=50)
    def __unicode__(self):
        return self.hostname

class HostGroup(models.Model):
    groupname = models.CharField(max_length=50)
    members = models.ManyToManyField(Host)