1 files changed, 76 insertions, 0 deletions
diff --git a/scripts/crawler/tbc_web_crawler/spiders/tbc_spider.py b/scripts/crawler/tbc_web_crawler/spiders/tbc_spider.py
new file mode 100644
index 0000000..9688e70
--- /dev/null
+++ b/scripts/crawler/tbc_web_crawler/spiders/tbc_spider.py
@@ -0,0 +1,76 @@
+import scrapy
+from items import TbcErrorItems, TbcBrokenItems 
+from scrapy.utils.response import get_base_url
+from scrapy.utils.url import urljoin_rfc
+from scrapy.http import Request
+
+import os, json
+
+if os.path.isfile('items.json'):
+	os.remove('items.json')
+else:
+	pass
+	
+class TbcSpider(scrapy.Spider):
+
+	name = "tbc_spider"  # Name of the crawler. Use this name when crawling from the terminal, for eg - scrapy crawl tbc_spider
+	
+	start_urls = ["http://tbc-python.fossee.aero.iitb.ac.in/completed-books/"]
+	handle_httpstatus_list = [404, 500, 502] # A list containing HTTP error codes.
+	
+	def parse(self,response):
+		""" This function looks for book links and returns the url"""
+		
+		for book_link in response.xpath('//a[contains(@href,"book-details")]/@href').extract():
+			""" Searches for links with "book-details" in it """
+		
+			first_base_url = get_base_url(response)
+			first_relative_url = urljoin_rfc(first_base_url,book_link)
+			"""creates a url to be returned to the next function."""
+		
+			yield scrapy.Request(first_relative_url,callback=self.parse_book_contents)
+		
+			
+			
+	def parse_book_contents(self, response):
+		
+		""" This function looks for chapter links through each book link and returns the url"""
+	
+		for chapter_link in response.xpath ('//a[contains(@href,"convert-notebook")]/@href').extract():
+			""" Searches for chapters in each book list"""
+			second_base_url = get_base_url(response).split('/book-details')[0]
+			second_relative_url = urljoin_rfc(second_base_url,chapter_link)
+			"""creates a url to be returned to the next function."""
+			
+			yield scrapy.Request(second_relative_url,callback=self.parse_chapter_details)
+			
+			
+
+	def parse_chapter_details(self, response):
+		 
+		if not response.xpath('//h1/text()').extract():
+			chapter_details = [response.url]
+		else:
+			chapter_details = response.xpath('//h1/text()').extract()
+
+		
+		error_tag = response.xpath('//div[@class="output_subarea output_text output_error"]') 
+		error_list = [error_notifications for error_notifications \
+		              in response.xpath \
+		              ('//div[@class="output_subarea output_text output_error"]/span/text()').extract()]
+
+		if response.status in self.handle_httpstatus_list:
+			broken_items = TbcBrokenItems()
+			broken_items['broken_url'] = response.url
+			broken_items['broken_status'] = response.status
+			yield broken_items
+		else:
+			if len(error_tag) != 0:
+				items = TbcErrorItems()
+				items ['chapter_name'] = chapter_details[0]
+				items ['chapter_urls'] = response.url
+				items ['number_of_errors'] = len (error_tag)
+				#items ['completed_book_urls'] = response.request.headers.get('Referer', None)
+				#items ['error_messages'] = error_list
+				yield items
+