Subversion Repositories SmartDukaan

'''

Created on 09-Jun-2010

@author: gaurav

'''

from scrapy.spider import BaseSpider

from scrapy.selector import HtmlXPathSelector

from scrapy.http import Request

from demo.items import DemoItem

from scrapy.contrib.spidermiddleware import referer

from scrapy.http.headers import Headers

from scrapy.http.request.form import FormRequest

from scrapy.log import msg

from scrapy.http.response import Response

from datastore.DataAccessor import *

from datastore.DataCodeAccessor import *

from html2text.unescaping import *

import urllib

class mobilestore_spider0(BaseSpider):

    """

    Documentation for class mobilestore_spider0

    This spider collects the information for the individual phones

    and store them in table datastore_datadefinition_themobilestorephones_new

    """

    def __init__(self):

       """

        Documentation for constructor

        initialize_table is called to make all the tables known in

        the scope of this class.

        Also start url needs to be feeded to the spider through start_urls.append

        Domainname is name by which this spider is known outside

        So this will be used as an argument for calling this spider.

        As the number of pages to be crawled are not fixed so ct and nt are used to make it dynamic.

        url1 and url2 are used for getting actual start urls.  

       """ 

       initialize_table()  

       #MOBILESTORE_DOMAINNAME0 = "mobilestore0"   

       MOBILESTORE_DOMAINNAME0 = get_code_word("MOBILESTORE_DOMAINNAME0")

       self.domain_name = MOBILESTORE_DOMAINNAME0

       da = DataHelper()

       MOBILESTORE_CT = int(da.get_extra_vars('mobilestore_count'))

       nt = 1

       if MOBILESTORE_CT > 800:

           nt = MOBILESTORE_CT-50

       while nt < MOBILESTORE_CT:

           #MOBILESTORE_URL1 = "http://www.themobilestore.in/mobilestore/faces/tiles/product.jsp?productID=" + str(nt)

           MOBILESTORE_URL1 = get_code_word("MOBILESTORE_URL1") + str(nt)

           #MOBILESTORE_URL2 = MOBILESTORE_URL1 + "&catalogueID=3"

           MOBILESTORE_URL2 = MOBILESTORE_URL1 + get_code_word("MOBILESTORE_URL2")

           self.start_urls.append(MOBILESTORE_URL2)

           nt = nt+1

    def start_requests(self):

        """

        Documentation for method start_requests

        To set various properties of the request to be made

        like referer, headers and all.

        Also suppliers entry need to be done in the table

        datastore_datadefinition_suppliers.

        @return a list of well formed requests which will be 

        crawled by spider and spider will return the response

        """

        #adding entry for the supplier i.e its name and site

        #MOBILESTORE_HOMEPAGE = "www.themobilestore.in"

        MOBILESTORE_HOMEPAGE = get_code_word("MOBILESTORE_HOMEPAGE")

        da = DataHelper()

        da.add_supplier(self.domain_name, MOBILESTORE_HOMEPAGE)

        listreq = []

        #for each request a referer has to be set

        #MOBILESTORE_REFERER = "www.google.com/search"

        MOBILESTORE_REFERER = get_code_word("MOBILESTORE_REFERER")

        for url1 in self.start_urls:

            request = Request(url = str(url1), callback=self.parse)

            request.headers.setdefault("Referer", MOBILESTORE_REFERER)

            listreq.append(request)

        return listreq

    def parse(self, response):

        """

        Documentation for method parse

        @param response of individual requests

        Using Xpaths needed information is extracted out of the response

        and added to the database

        Xpath3 = Give us name for individual phone

        Xpath4 = Give us price for individual phone

        Xpath5 = Give us name for individual phone, if its not gettable from xpath3

        Xpath6 = Give us name for individual phone, if its not gettable from xpath3 and xpath5

        Xpath7 = to check that the phone can be bought or not

        Xpath8 = to check that the item is mobile phone

        """

        da = DataHelper()

        url1 = response.url

        ps1 = url1.find('=')

        ps2 = url1.find('&')

        str1 = url1[ps1+1:ps2]

        #da = DataHelper()

        hxs = HtmlXPathSelector(response)

        #MOBILESTORE_XPATH3 = '//span[@id="productLayoutForm:categoryNavigation:navigationList_2:navigationList3"]/text()'

        MOBILESTORE_XPATH3 = get_code_word("MOBILESTORE_XPATH3")

        #MOBILESTORE_XPATH4 = '//div[@id="priceComp"]//tr[2]/td[3]/span/text()'

        MOBILESTORE_XPATH4 = get_code_word("MOBILESTORE_XPATH4")

        #MOBILESTORE_XPATH5 = '//span[@id="productLayoutForm:categoryNavigation:navigationList_1:navigationList3"]/text()'

        MOBILESTORE_XPATH5 = get_code_word("MOBILESTORE_XPATH5")

        #MOBILESTORE_XPATH6 = '//span[@id="productLayoutForm:categoryNavigation:navigationList_0:navigationList3"]/text()'

        MOBILESTORE_XPATH6 = get_code_word("MOBILESTORE_XPATH6")

        #MOBILESTORE_XPATH7 = '//div[@id="priceComp"]/b/text()'

        MOBILESTORE_XPATH7 = get_code_word("MOBILESTORE_XPATH7")

        #MOBILESTORE_XPATH8 = '//span[@id="productLayoutForm:categoryNavigation:navigationList_0:navigationList1"]/text()'

        MOBILESTORE_XPATH8 = get_code_word("MOBILESTORE_XPATH8")

        try:

            catg = hxs.select(MOBILESTORE_XPATH8)

            catg = catg[0].extract()

            catg = catg.strip()

            catg = unescape(catg)

            print catg

            if catg == "Mobile Phones>":

                try:

                    str2 = hxs.select(MOBILESTORE_XPATH7)

                    str2 = str2[0].extract()

                    str2 = "can buy"

                except:

                    str2 = "can not buy"    

                try:

                    name = hxs.select(MOBILESTORE_XPATH3)

                    name = name[0].extract()

                    name = name.strip()

                    price = hxs.select(MOBILESTORE_XPATH4)

                    price = price[0].extract()

                    price = price.strip()

                    price = int(price)

                    da.add_new_mobstorephone_new(name, price, price, str2)   

                except:

                    try:

                        name = hxs.select(MOBILESTORE_XPATH5)

                        name = name[0].extract()

                        name = name.strip()

                        price = hxs.select(MOBILESTORE_XPATH4)

                        price = price[0].extract()

                        price = price.strip()

                        price = int(price)

                        da.add_new_mobstorephone_new(name, price, price, str2)   

                    except:

                        try:

                            name = hxs.select(MOBILESTORE_XPATH6)

                            name = name[0].extract()

                            name = name.strip()

                            price = hxs.select(MOBILESTORE_XPATH4)

                            price = price[0].extract()

                            price = price.strip()

                            price = int(price)

                            da.add_new_mobstorephone_new(name, price, price, str2)   

                        except:

                            pass

        except:    

          ct = int(da.get_extra_vars('mobilestore_count'))

          if ct>800:

            fails = int(da.get_extra_vars('mobilestore_fails'))

            fails = fails+1

            da.set_extra_vars('mobilestore_fails',str(fails),'')

            if fails > 40:

                da.set_extra_vars('mobilestore_flag','FALSE','')

SPIDER = mobilestore_spider0()