自己写一个爬虫 copider

copider 模仿scrapy的一些写法，当然我这个是单进程的，不是异步的

1.目录 copider/copider.py

#coding=utf-8

‘‘‘
Created on 2015年10月8日

@author: snt1
‘‘‘

import urllib2
import lxml.html
import StringIO

class Spider(object):
    def __init__(self, url, meta=None):
        self.URL = url
        self.META = meta
        self.TEXTMARK = self.get(url)
        self.SEL = self.selector(doc=self.TEXTMARK)

    def get(self, url):
        try:
            req = urllib2.Request(url)
            req.add_header(‘User-Agent‘, ‘Mozilla/5.0 (Macintosh; Intel Mac OS X 10_10_1) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/44.0.2403.155 Safari/537.36‘)
            shtml = urllib2.urlopen(req, timeout=15).read()
        except Exception, e:
            print e,"...next.."

        data = StringIO.StringIO(shtml)
        HTML = data.read()
        return(HTML)

    # 返回html
    @property
    def html(self):
        return self.TEXTMARK

    @property
    def url(self):
        return self.URL

    @property
    def meta(self):
        return self.META

    def selector(self, doc=None):
        if doc:
            HTML = doc
        else:
            HTML = self.HTML
        return lxml.html.fromstring(HTML)

    def xpath(self, rule):
        iter_list = self.SEL.xpath(rule)
        attrList = []
        try:
            for ele in iter_list:
                attrList.append(ele.attrib)
                #attrList.append(ele.attrib)
            return attrList
        except Exception, e:
            return iter_list

def Request(url, func, **meta):
    if meta:
        response=Spider(url,meta[‘meta‘])
    else:
        response=Spider(url)
    func(response)

2.copider/aero.py

#coding=utf-8

‘‘‘
Created on 2015年10月8日

@author: snt1
‘‘‘

import re
import time
from copider import Spider, Request

class AeroCopider(object):

    name = "aero"
    storeId = "554b14c97b010cc731e81b35" # 站点ID
    allowed_domains = ["www.xxxx.com"]

    root_url = ‘http://www.xxxx.com‘
    category_url = root_url + ‘/category/index.jsp?numResultsPerPage=100&categoryId=%s‘
    cap_category_url = root_url + ‘/family/index.jsp?categoryId=%s&page=%d&numResultsPerPage=100‘
    url_dicts = {‘3534623‘:‘Girls‘, ‘3534624‘:‘Guys‘}

    def __init__(self):
        self.start_urls()

    def start_urls(self):
        for fid in self.url_dicts.keys():
            url = self.category_url %fid
            response = Spider(url)
            node_a = response.xpath(‘//*[@id="sidebar-left"]/div/dl[2]/dd//dt/a/@href‘)
            node_text = response.xpath(‘//*[@id="sidebar-left"]/div/dl[2]/dd//dt/a/text()‘)

            url_list, cid_list  = [],[]
            for num, preparing in enumerate(node_a):
                parttern = re.compile(r‘family.jsp\?categoryId=‘)
                if parttern.search(preparing):
                    chd_url = self.root_url+preparing
                    pattern_sub = re.compile(‘&cp=.*?$‘)
                    chd_url = pattern_sub.sub(‘‘, chd_url, re.S|re.I|re.M)

                    pattern_fin = re.compile(r‘family.jsp\?categoryId=(\d+)‘)
                    cid = pattern_fin.findall(chd_url)[0]
                    url_list.append(chd_url)
                    cid_list.append(cid)
                    print(u‘产品分类链接：%s -> %s‘ %(node_text[num], chd_url))
                    cateid = cid_list[num]
                    Request(chd_url, self.parse_page, meta={‘cateid‘:cateid})
                    print

    def parse_page(self, response):
        #total_page = response.xpath(‘//div[@class="pagination"]/ul/li/a[@rel="nofollow"]/text()‘)
        total_items = int(response.xpath(‘//*[@id="main-wrap"]//li[@class="count"]/span/text()‘)[0])
        mod, rem = divmod(total_items, 100)
        if mod > 1:
            if rem > 0:
                mod += 1
        else:
            mod = 1

        total_page = mod
        print(u‘产品总分页数: %s -> %s‘ %(total_page,response.url))

        cateid = response.meta[‘cateid‘]
        for page in range(1, total_page+1):
            url = self.cap_category_url %(cateid, page)
            Request(url, self.parse_product)

    def parse_product(self, response):
        product = response.xpath(‘//*[@id="products"]//h4/a/@href‘)
        print(u‘以下来自哪个页面:%s‘ %response.url)
        print(u‘产品:%s个 -> 路径:%s‘ %(len(product), product))

if __name__ == ‘__main__‘:
    AeroCopider()