python根据京东商品url获取产品价格

京东商品详细的请求处理，是先显示html，然后再ajax请求处理显示价格。
1.可以运行js，并解析之后得到的html
2.模拟js请求，得到价格

# -*- coding: utf-8 -*-
"""
根据京东url地址，获取商品价格
京东请求处理过程，先显示html页面，然后通过ajax get请求获取相应的商品价格
 
1.商品的具体数据在html中的格式，如下(示例)
# product: {
#     skuid: 1310118868,#     name: 'u9999u5f71u77edu88d9u4e24u4ef6u5957u88c5u5973u0032u0030u0031u0034u51acu88c5u65b0u6b3eu97e9u7248u957fu8896u0054u6064u4e0au8863u8377u53f6u8fb9u534au8eabu88d9u6f6eu0020u85cfu9752u0020u004d',#     skuidkey:'7781F505B71CE37A3AFBADA119D3587F',#     href: 'http://item.jd.com/1310118868.html',#     src: 'jfs/t385/197/414081450/336886/3070537b/541be890N2995990c.jpg',#     cat: [1315,1343,1355],#     brand: 18247,#     nBrand: 18247,#     tips: false,#     type: 2,#     venderId:38824,#     shopId:'36786',#     TJ:'0',#     specialAttrs:["is7ToReturn-1"],#     videoPath:'',#     HM:'0'
#   }
 
2.ajax请求代码如下：
# // 获得数字价格
# var getPriceNum = function(skus,$wrap,perfix,callback) {
#   skus = typeof skus === 'string' ? [skus]: skus;
#   $wrap = $wrap || $('body');
#   perfix = perfix || 'J-p-';
#   $.ajax({
#     url: 'http://p.3.cn/prices/mgets?skuIds=J_' + skus.join(',J_') + '&type=1',#     dataType: 'jsonp',#     success: function (r) {
#       if (!r && !r.length) {
#         return false;
#       }
#       for (var i = 0; i < r.length; i++) {
#         var sku = r[i].id.replace('J_','');
#         var price = parseFloat(r[i].p,10);
#
#         if (price > 0) {
#           $wrap.find('.'+ perfix + sku).html('￥' + r[i].p + '');
#         } else {
#           $wrap.find('.'+ perfix + sku).html('暂无报价');
#         }
#
#         if ( typeof callback === 'function' ) {
#           callback(sku,price,r);
#         }
#       }
#     }
#   });
# };
"""
import urllib
import json
import re
 
 
class JdPrice(object):
  """
  对获取京东商品价格进行简单封装
  """
  def __init__(self,url):
    self.url = url
    self._response = urllib.urlopen(self.url)
    self.html = self._response.read()
 
  def get_product(self):
    """
    获取html中，商品的描述(未对数据进行详细处理，粗略的返回str类型)
    :return:
    """
    product_re = re.compile(r'compatible: true,(.*?)};',re.S)
    product_info = re.findall(product_re,self.html)[0]
    return product_info
 
  def get_product_skuid(self):
    """
    通过获取的商品信息，获取商品的skuid
    :return:
    """
    product_info = self.get_product()
    skuid_re = re.compile(r'skuid: (.*?),')
    skuid = re.findall(skuid_re,product_info)[0]
    return skuid
 
  def get_product_name(self):
    pass
 
  def get_product_price(self):
    """
    根据商品的skuid信息，请求获得商品price
    :return:
    """
    price = None
    skuid = self.get_product_skuid()
    url = 'http://p.3.cn/prices/mgets?skuIds=J_' + skuid + '&type=1'
    price_json = json.load(urllib.urlopen(url))[0]
    if price_json['p']:
      price = price_json['p']
    return price
 
 
# 测试代码
if __name__ == '__main__':
  url = 'http://item.jd.com/1310118868.html'
  url = 'http://item.jd.com/1044773.html'
  jp = JdPrice(url)
  print jp.get_product_price()
 
 
# htm.decode('gb2312','ignore').encode('utf-8')
# f = open('jjs.html','w')
# f.write(htm)
# f.close()

再给大家分享一个京东价格的爬虫：

fromcreepyimportCrawler
fromBeautifulSoupimportBeautifulSoup
importurllib2
importjson

classMyCrawler(Crawler):
defprocess_document(self,doc):
ifdoc.status==200:
print[%d]%s%(doc.status,doc.url)
try:
soup=BeautifulSoup(doc.text.decode(gb18030).encode(utf-8))
exceptExceptionase:
printe
soup=BeautifulSoup(doc.text)
printsoup.find(id="product-intro").div.h1.text
url_id=urllib2.unquote(doc.url).decode(utf8).split(/)[-1].split(.)[0]
f=urllib2.urlopen(http://p.3.cn/prices/get?skuid=J_+url_id,timeout=5)
price=json.loads(f.read())
f.close()
printprice[0][p]
else:
pass

crawler=MyCrawler()
crawler.set_follow_mode(Crawler.F_SAME_HOST)
crawler.set_concurrency_level(16)
crawler.add_url_filter(.(jpg|jpeg|gif|png|js|css|swf)$)
crawler.crawl(http://item.jd.com/982040.html)

（编辑：安卓应用网）

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