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: '\u9999\u5f71\u77ed\u88d9\u4e24\u4ef6\u5957\u88c5\u5973\u0032\u0030\u0031\u0034\u51ac\u88c5\u65b0\u6b3e\u97e9\u7248\u957f\u8896\u0054\u6064\u4e0a\u8863\u8377\u53f6\u8fb9\u534a\u8eab\u88d9\u6f6e\u0020\u85cf\u9752\u0020\u004d',
    #     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)