hallojakarta.py 文件源码

def parse(self, response):
        self.logger.info('parse: %s' % response)
        is_no_update = False

        # Get list of news from the current page
        articles = response.css('article')
        if not articles:
            raise CloseSpider('article not found')
        for article in articles:
            # Close the spider if we don't find the list of urls
            url_selectors = article.css('a::attr(href)')
            if not url_selectors:
                raise CloseSpider('url_selectors not found')
            url = url_selectors.extract()[0]

            # Example: 'Monday, 24/11/2016 | 13:54'
            date_selectors = article.css('time::text')
            if not date_selectors:
                raise CloseSpider('date_selectors not found')

            # Parse date information
            try:
                date = date_selectors.extract()[0].split(' ')
                published_at_wib = datetime.strptime(' '.join(date[1:]), '%d/%m/%Y | %H:%M')
            except ValueError as e:
                raise CloseSpider('cannot_parse_date: %s' % e)

            published_at = wib_to_utc(published_at_wib)

            if self.media['last_scraped_at'] >= published_at:
                is_no_update = True
                break

            # For each url we create new scrapy request
            yield Request(url, callback=self.parse_news)

        if is_no_update:
            self.logger.info('Media have no update')
            return

        # try getting next page
        try:
            next_page_url = response.css('div.pagination > a.next::attr(href)').extract()[0]

            if next_page_url:
                yield Request(next_page_url, callback=self.parse)
        except:
            pass

    # Collect news item