利用xpath()分析抓取数据还是比较简单的,只是网址的跳转和递归等比较麻烦。耽误了好久,还是豆瓣好呀,URL那么的规范。唉,亚马逊URL乱七八糟的.... 可能对url理解还不够.
amazon
├── amazon
│ ├── __init__.py
│ ├── __init__.pyc
│ ├── items.py
│ ├── items.pyc
│ ├── msic
│ │ ├── __init__.py
│ │ └── pad_urls.py
│ ├── pipelines.py
│ ├── settings.py
│ ├── settings.pyc
│ └── spiders
│ ├── __init__.py
│ ├── __init__.pyc
│ ├── pad_spider.py
│ └── pad_spider.pyc
├── pad.xml
└── scrapy.cfg
(1)items.py
from scrapy import Item, Field
class PadItem(Item):
sno = Field()
price = Field()
(2)pad_spider.py
# -*- coding: utf-8 -*-
from scrapy import Spider, Selector
from scrapy.http import Request
from amazon.items import PadItem
class PadSpider(Spider):
name = "pad"
allowed_domains = ["amazon.com"]
start_urls = []
u1 = 'http://www.amazon.cn/s/ref=sr_pg_'
u2 = '?rh=n%3A2016116051%2Cn%3A!2016117051%2Cn%3A888465051%2Cn%3A106200071&page='
u3 = '&ie=UTF8&qid=1408641827'
for i in range(181):
url = u1 + str(i+1) + u2 + str(i+1) + u3
start_urls.append(url)
def parse(self, response):
sel = Selector(response)
sites = sel.xpath('//div[@class="rsltGrid prod celwidget"]')
items = []
for site in sites:
item = PadItem()
item['sno'] = site.xpath('@name').extract()[0]
try:
item['price'] = site.xpath('ul/li/div/a/span/text()').extract()[0]
# 索引异常,说明是新品
except IndexError:
item['price'] = site.xpath('ul/li/a/span/text()').extract()[0]
items.append(item)
return items
(3)settings.py
# -*- coding: utf-8 -*-
# Scrapy settings for amazon project
#
# For simplicity, this file contains only the most important settings by
# default. All the other settings are documented here:
#
# http://doc.scrapy.org/en/latest/topics/settings.html
#
BOT_NAME = 'amazon'
SPIDER_MODULES = ['amazon.spiders']
NEWSPIDER_MODULE = 'amazon.spiders'
# Crawl responsibly by identifying yourself (and your website) on the user-agent
#USER_AGENT = 'amazon (+http://www.yourdomain.com)'
USER_AGENT = 'Mozilla/5.0 (Macintosh; Intel Mac OS X 10_8_3) AppleWebKit/536.5 (KHTML, like Gecko) Chrome/19.0.1084.54 Safari/536.5'
FEED_URI = 'pad.xml'
FEED_FORMAT = 'xml'
(4)结果如下 pad.xml
<?xml version="1.0" encoding="utf-8"?>
<items>
<item>
<sno>B00JWCIJ78</sno>
<price>¥3199.00</price>
</item>
<item>
<sno>B00E907DKM</sno>
<price>¥3079.00</price>
</item>
<item>
<sno>B00L8R7HKA</sno>
<price>¥3679.00</price>
</item>
<item>
<sno>B00IZ8W4F8</sno>
<price>¥3399.00</price>
</item>
<item>
<sno>B00MJMW4BU</sno>
<price>¥4399.00</price>
</item>
<item>
<sno>B00HV7KAMI</sno>
<price>¥3799.00</price>
</item>
...
</items>
(5)数据保存,保存到数据库
...
-- 2014年08月22日04:12:43