# -*- 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)

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