def extract_content(self, selector='', attr='', default='', connector='', *args, **kwargs):
		"""
		Method for performing the content extraction for the particular selector type. \

		If the selector is "url", the URL of the current web page is returned.
		Otherwise, the selector expression is used to extract content. The particular \
		attribute to be extracted ("text", "href", etc.) is specified in the method \
		arguments, and this is used to extract the required content. If the content \
		extracted is a link (from an attr value of "href" or "src"), the URL is parsed \
		to convert the relative path into an absolute path.

		If the selector does not fetch any content, the default value is returned. \
		If no default value is specified, an exception is raised.

		:param selector: The XPath expression
		:param attr: The attribute to be extracted from the selected tag
		:param default: The default value to be used if the selector does not return any data
		:param connector: String connector for list of data returned for a particular selector
		:return: The extracted content
		"""
		try:
			if selector.lower() == "url":
				return self.url
			if attr.lower() == "text":
				tag = self.get_tree_tag(selector=selector, get_one=True)
				content = connector.join([make_ascii(x).strip() for x in tag.itertext()])
				content = content.replace("\n", " ").strip()
			else:
				tag = self.get_tree_tag(selector=selector, get_one=True)
				content = tag.get(attr)
				if attr in ["href", "src"]:
					content = urljoin(self.url, content)
			return content
		except IndexError:
			if default is not "":
				return default
			raise Exception("There is no content for the %s selector - %s" % (self.__selector_type__, selector))
		except XPathError:
			raise Exception("Invalid %s selector - %s" % (self.__selector_type__, selector))