Subversion Repositories SmartDukaan

'''
Created on 06-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 import *
import urllib

class babuchak3(BaseSpider):
    """
    Documentation for class babuchak3
    This spider collects the information for the individual phones
    and store them in table datastore_datadefinition_babuchak_phones.
    """
    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
        Domainname2 is name by which this spider is known outside
        So this will be used as an argument for calling this spider 
        """
        initialize_table()
        #BABUCHAK_DOMAINNAME2 = "babuchak2"   
        BABUCHAK_DOMAINNAME2 = get_code_word("BABUCHAK_DOMAINNAME2")
        self.domain_name = BABUCHAK_DOMAINNAME2  
        da = DataHelper()
        for item in da.get_allbabuchakphoneurls():
            self.start_urls.append(item.url)
            
    def start_requests(self):
        """
        Documentation for method start_requests
        To set various properties of the request to be made
        like referer, headers and all.
        @return a list of well formed requests which will be 
        crawled by spider and spider will return the response
        """
        listreq = []
        #for each request a referer has to be set
        #BABUCHAK_REFERER = "www.google.com/search"
        BABUCHAK_REFERER = get_code_word("BABUCHAK_REFERER")
        for url1 in self.start_urls:
            request = Request(url = str(url1), callback=self.parse)
            request.headers.setdefault("Referer", BABUCHAK_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
        Xpath5 = Give us name for individual phone
        Xpath6 = Give us quoted-price for individual phone
        Xpath7 = Give us final_price for individual phone
        Removelist = To filer the prices so as to make them integer for eg remove ',' or 'Rs'
        """
        da = DataHelper()
        hxs = HtmlXPathSelector(response)
        #BABUCHAK_XPATH5 = '//td[@class="text-header"]/text()'
        BABUCHAK_XPATH5 = get_code_word("BABUCHAK_XPATH5")
        #BABUCHAK_XPATH6 = '//td[@class="xl63"]//strong/span/text()'
        BABUCHAK_XPATH6 = get_code_word("BABUCHAK_XPATH6")
        #BABUCHAK_XPATH7 = '//td[@class="mod-item-body-title"]/b/text()'
        BABUCHAK_XPATH7 = get_code_word("BABUCHAK_XPATH7")
        #BABUCHAK_REMOVELIST = ["Rs.","Rs",",","-","/"]
        #list separated by ';'
        BABUCHAK_REMOVELIST = str(get_code_word("BABUCHAK_REMOVELIST"))
        if len(BABUCHAK_REMOVELIST)>0:
            BABUCHAK_REMOVELIST = BABUCHAK_REMOVELIST.split(';')
        name = hxs.select(BABUCHAK_XPATH5)[0].extract()
        try:
            shown_price = hxs.select(BABUCHAK_XPATH6)[0].extract()
            final_price = hxs.select(BABUCHAK_XPATH6)[2].extract()
        except:
            final_price = shown_price = hxs.select(BABUCHAK_XPATH7)[0].extract()
            
             
        name = name.strip()
        shown_price = shown_price.strip()
        final_price = final_price.strip()
        
        if shown_price != '':        
            for r in BABUCHAK_REMOVELIST: 
                while shown_price.find(r) != -1:
                    shown_price = shown_price.replace(r, "")
        shown_price = shown_price.strip()
            
        if final_price != '':        
            for r in BABUCHAK_REMOVELIST: 
                while final_price.find(r) != -1:
                    final_price = final_price.replace(r, "")
        final_price = final_price.strip()
        ps1 = shown_price.find('.')
        if ps1 != -1:
            shown_price = shown_price[0:ps1]
            final_price = shown_price
        shown_price = int(shown_price)
        final_price = int(final_price)
        
        #There were some phones on which discount was there so it had
        #marked price, quoted price and final price
        if shown_price>final_price:
            try:
                shown_price = hxs.select(BABUCHAK_XPATH6)[1].extract()
                final_price = hxs.select(BABUCHAK_XPATH6)[2].extract()
            except:
                final_price = shown_price = hxs.select(BABUCHAK_XPATH7)[0].extract()
                
            name = name.strip()
            shown_price = shown_price.strip()
            final_price = final_price.strip()
            
            if shown_price != '':        
                for r in BABUCHAK_REMOVELIST: 
                    while shown_price.find(r) != -1:
                        shown_price = shown_price.replace(r, "")
            shown_price = shown_price.strip()
                
            if final_price != '':        
                for r in BABUCHAK_REMOVELIST: 
                    while final_price.find(r) != -1:
                        final_price = final_price.replace(r, "")
            final_price = final_price.strip()
            ps1 = shown_price.find('.')
            if ps1 != -1:
                shown_price = shown_price[0:ps1]
                final_price = shown_price
        
            shown_price = int(shown_price)
            final_price = int(final_price)
        da.add_babuchakphone(name,shown_price,final_price)        
SPIDER = babuchak3()