잘못된 IMG SRC를 추출하는 치료

나는 URLs of images on a page이 HERO_PHOTO 인 Scrapy를 사용하려고합니다. 대상 요소는 다음 HTML 코드잘못된 IMG SRC를 추출하는 치료

$('#HERO_PHOTO').attr('src')

이 URL을 잡고 제대로

"https://media-cdn.tripadvisor.com/media/photo-s/04/71/70/7c/gray-line-tours-montreal.jpg"

문제를 실행

크롬 브라우저 내에서

<img alt="Photo of Gray Line" style="position: relative; left: -50px; top: 0px;" id="HERO_PHOTO" class="flexibleImage" src="https://media-cdn.tripadvisor.com/media/photo-s/04/71/70/7c/gray-line-tours-montreal.jpg" width="352" height="260">

을 가지고 :,536,913 63,210 그러나 .extract()를 사용하여 우리에게

https://static.tacdn.com/img2/x.gif

을 제공

response.css('#HERO_PHOTO::attr(src)').extract_first()

및

response.css('#HERO_PHOTO').xpath('@src').extract_first()

및

response.css('#HERO_PHOTO[src]').extract_first()

을 Scrapy에서 다음 CSS 선택기를한다하여도 같은 반환 잘못된 URL.

왜 Scrapy가 다른 SRC 값을 잡아 냅니까?

출처

2016-10-02 Nyxynyx

잘못된 CSS 선택기를 사용하고 있습니다. w3 schools에서 원하는 속성을 선택하는 것 같습니다. [src].

시도해보십시오.

response.css ('#의 HERO_PHOTO [SRC]'). extract_first()

나의 다음 제안이 extract_first를 사용하지 않고 당신이 무엇을 얻을 볼 수있다(). 이 response.css ('#의 HERO_PHOTO [SRC]')의 반환 값의 경우 참조

편집 : 난 당신이 겪고있는 문제는 당신은 페이지의 소스가 아닌 렌더링 된 HTML을 쿼리하는 생각합니다. 여기 내가 믿는 것에 대한 링크가 있습니다. 당신은 서버가 응답 한 것을 쿼리하는

This Questions first answer

, 자바 스크립트를 조작 할 수있는 기회를했다 없습니다 것을.

출처

2016-10-02 13:53:43 ddeamaral

'response.css ('#의 HERO_PHOTO [SRC]') 추출()''저를 얻는다 [u는 ' Photo of PHI Centre 를']' – Nyxynyx

당신은 당신이 tryi하고있는 HTML을 게시 할 수 있습니다 에서 추출 할 수 있습니까? – ddeamaral

이것은 https://www.tripadvisor.com/Attraction_Review-g155032-d1494256-Reviews-Gray_Line-Montreal_Quebec.html 페이지입니다. 내가 목표로 삼고있는 HTML 덩어리가 문제입니다. – Nyxynyx

이미지 링크는 페이지에 있지만, 바로 <img> 태그가 아닙니다. 실제로 일부 JavaScript 코드로 처리됩니다. 은 (조금 포맷) 원하는 이미지 링크와 HTML 내부에 자바 스크립트 코드 조각이된다 js2xml이 사용하는 구문 분석

... 
}(window,ta)); 
</script> 
<script type="text/javascript"> 
var lazyImgs = [{ 
    "data": "//maps.google.com/maps/api/staticmap?&channel=ta.desktop&zoom=15&size=340x225&client=gme-tripadvisorinc&sensor=falselanguageParam&center=45.503395,-73.573174&maptype=roadmap&&markers=icon:http%3A%2F%2Fc1.tacdn.com%2Fimg2%2Fmaps%2Ficons%2Fpin_v2_CurrentCenter.png|45.503395,-73.57317&signature=FqI7Z1egbpsVrlEE0yjw9HmsMJ8=", 
    "scroll": false, 
    "tagType": "img", 
    "id": "lazyload_1098682971_0", 
    "priority": 500, 
    "logerror": false 
}, { 
    "data": "//ad.atdmt.com/i/img;p=11007200799198;cache=?ord=1475487471489", 
    "scroll": false, 
    "tagType": "img", 
    "id": "lazyload_1098682971_1", 
    "priority": 1000, 
    "logerror": false 
}, { 
    "data": "//ad.doubleclick.net/ad/N4764.TripAdvisor/B7050081;sz=1x1?ord=1475487471489", 
    "scroll": false, 
    "tagType": "img", 
    "id": "lazyload_1098682971_2", 
    "priority": 1000, 
    "logerror": false 
}, { 
    "data": "https://static.tacdn.com/img2/maps/icons/spinner24.gif", 
    "scroll": false, 
    "tagType": "img", 
    "id": "lazyload_1098682971_3", 
    "priority": 100, 
    "logerror": false 
}, { 
    "data": "https://media-cdn.tripadvisor.com/media/photo-s/04/71/70/7c/gray-line-tours-montreal.jpg", 
    "scroll": false, 
    "tagType": "img", 
    "id": "HERO_PHOTO", 
    "priority": 100, 
    "logerror": false 
}, { 
    "data": "https://media-cdn.tripadvisor.com/media/photo-s/0c/f5/19/98/montreal-night-tour.jpg", 
    "scroll": false, 
    "tagType": "img", 
    "id": "THUMB_PHOTO1", 
    "priority": 100, 
    "logerror": false 
}, { 
    "data": "https://media-cdn.tripadvisor.com/media/photo-s/0c/f5/19/8f/montreal-night-tour.jpg", 
    "scroll": false, 
    "tagType": "img", 
    "id": "THUMB_PHOTO2", 
    "priority": 100, 
    "logerror": false 
}, { 
    "data": "https://static.tacdn.com/img2/generic/site/no_user_photo-v1.gif", 
    "scroll": false, 
    "tagType": "img", 
    "id": "lazyload_1098682971_4", 
    "priority": 100, 
    "logerror": false 
}...

한 가지 방법은 :

from pprint import pprint 
# get all `<script>`s content 
for js in response.xpath('.//script[@type="text/javascript"]/text()').extract(): 
    try: 
     jstree = js2xml.parse(js) 

     # look for assignment of `var lazyImgs` 
     for imgs in jstree.xpath('//var[@name="lazyImgs"]/*'): 

      # use js2xml.make_dict() -- poor name I know 
      # to build a useful Python object 
      data = js2xml.make_dict(imgs) 

      pprint(data) 

      break 

    except Exception as e: 
     pass

이것은 당신이 무엇을 얻을 에서 :.

[{'data': '//maps.google.com/maps/api/staticmap?&channel=ta.desktop&zoom=15&size=340x225&client=gme-tripadvisorinc&sensor=falselanguageParam&center=45.503395,-73.573174&maptype=roadmap&&markers=icon:http%3A%2F%2Fc1.tacdn.com%2Fimg2%2Fmaps%2Ficons%2Fpin_v2_CurrentCenter.png|45.503395,-73.57317&signature=FqI7Z1egbpsVrlEE0yjw9HmsMJ8=', 
    'id': 'lazyload_-1977833463_0', 
    'logerror': False, 
    'priority': 500, 
    'scroll': False, 
    'tagType': 'img'}, 
{'data': 'https://static.tacdn.com/img2/maps/icons/spinner24.gif', 
    'id': 'lazyload_-1977833463_1', 
    'logerror': False, 
    'priority': 100, 
    'scroll': False, 
    'tagType': 'img'}, 
{'data': 'https://media-cdn.tripadvisor.com/media/photo-s/04/71/70/7c/gray-line-tours-montreal.jpg', 
    'id': 'HERO_PHOTO', 
    'logerror': False, 
    'priority': 100, 
    'scroll': False, 
    'tagType': 'img'}, 
{'data': 'https://media-cdn.tripadvisor.com/media/photo-s/0c/f5/19/98/montreal-night-tour.jpg', 
    'id': 'THUMB_PHOTO1', 
    'logerror': False, 
    'priority': 100, 
    'scroll': False, 
    'tagType': 'img'}, 
{'data': 'https://media-cdn.tripadvisor.com/media/photo-s/0c/f5/19/8f/montreal-night-tour.jpg', 
    'id': 'THUMB_PHOTO2', 
    'logerror': False, 
    'priority': 100, 
    'scroll': False, 
    'tagType': 'img'}, 
{'data': 'https://static.tacdn.com/img2/generic/site/no_user_photo-v1.gif', 
    'id': 'lazyload_-1977833463_2', 
    'logerror': False, 
    'priority': 100, 
    'scroll': False, 
    'tagType': 'img'}, 
{'data': 'https://media-cdn.tripadvisor.com/media/photo-l/08/38/19/cb/gayle-h.jpg', 
    'id': 'lazyload_-1977833463_3', 
    'logerror': False, 
    'priority': 100, 
    'scroll': True, 
    'tagType': 'img'}, 
{'data': 'https://static.tacdn.com/img2/badges/20px/lvl_01.png', 
    'id': 'lazyload_-1977833463_4', 
    'logerror': False, 
    'priority': 100, 
    'scroll': True, 
    'tagType': 'img'}, 
{'data': 'https://static.tacdn.com/img2/badges/20px/rev_02.png', 
    'id': 'lazyload_-1977833463_5', 
    'logerror': False, 
    'priority': 100, 
    'scroll': True, 
    'tagType': 'img'}, 
{'data': 'https://static.tacdn.com/img2/badges/20px/Appreciated.png', 
    'id': 'lazyload_-1977833463_6', 
    'logerror': False, 
    'priority': 100, 
    'scroll': False, 
    'tagType': 'img'}, 
{'data': 'https://static.tacdn.com/img2/icons/gray_flag.png', 
    'id': 'lazyload_-1977833463_7', 
    'logerror': False, 
    'priority': 100, 
    'scroll': True, 
    'tagType': 'img'}, 
{'data': 'https://media-cdn.tripadvisor.com/media/photo-l/01/b1/32/93/holidays1958.jpg', 
    'id': 'lazyload_-1977833463_8', 
    'logerror': False, 
    'priority': 100, 
    'scroll': True, 
    'tagType': 'img'}, 
{'data': 'https://static.tacdn.com/img2/badges/20px/lvl_04.png', 
    'id': 'lazyload_-1977833463_9', 
    'logerror': False, 
    'priority': 100, 
    'scroll': True, 
    'tagType': 'img'}, 
{'data': 'https://static.tacdn.com/img2/badges/20px/rev_04.png', 
    'id': 'lazyload_-1977833463_10', 
    'logerror': False, 
    'priority': 100, 
    'scroll': True, 
    'tagType': 'img'}, 
{'data': 'https://static.tacdn.com/img2/badges/20px/FunLover.png', 
    'id': 'lazyload_-1977833463_11', 
    'logerror': False, 
    'priority': 100, 
    'scroll': True, 
    'tagType': 'img'}, 
{'data': 'https://static.tacdn.com/img2/badges/20px/Appreciated.png', 
    'id': 'lazyload_-1977833463_12', 
    'logerror': False, 
    'priority': 100, 
    'scroll': False, 
    'tagType': 'img'}, 
{'data': 'https://static.tacdn.com/img2/icons/gray_flag.png', 
    'id': 'lazyload_-1977833463_13', 
    'logerror': False, 
    'priority': 100, 
    'scroll': True, 
    'tagType': 'img'}, 
{'data': 'https://media-cdn.tripadvisor.com/media/photo-o/06/4d/bc/f6/disneybus.jpg', 
    'id': 'lazyload_-1977833463_14', 
    'logerror': False, 
    'priority': 100, 
    'scroll': True, 
    'tagType': 'img'}, 
{'data': 'https://static.tacdn.com/img2/badges/20px/lvl_06.png', 
    'id': 'lazyload_-1977833463_15', 
    'logerror': False, 
    'priority': 100, 
    'scroll': True, 
    'tagType': 'img'}, 
{'data': 'https://static.tacdn.com/img2/badges/20px/rev_06.png', 
    'id': 'lazyload_-1977833463_16', 
    'logerror': False, 
    'priority': 100, 
    'scroll': True, 
    'tagType': 'img'}, 
{'data': 'https://static.tacdn.com/img2/badges/20px/FunLover.png', 
    'id': 'lazyload_-1977833463_17', 
    'logerror': False, 
    'priority': 100, 
    'scroll': True, 
    'tagType': 'img'}, 
{'data': 'https://static.tacdn.com/img2/badges/20px/Appreciated.png', 
    'id': 'lazyload_-1977833463_18', 
    'logerror': False, 
    'priority': 100, 
    'scroll': False, 
    'tagType': 'img'}, 
{'data': 'https://static.tacdn.com/img2/icons/gray_flag.png', 
    'id': 'lazyload_-1977833463_19', 
    'logerror': False, 
    'priority': 100, 
    'scroll': True, 
    'tagType': 'img'}, 
{'data': 'https://media-cdn.tripadvisor.com/media/photo-l/01/2e/70/a7/avatar078.jpg', 
    'id': 'lazyload_-1977833463_20', 
    'logerror': False, 
    'priority': 100, 
    'scroll': True, 
    'tagType': 'img'}, 
{'data': 'https://static.tacdn.com/img2/badges/20px/rev_01.png', 
    'id': 'lazyload_-1977833463_21', 
    'logerror': False, 
    'priority': 100, 
    'scroll': True, 
    'tagType': 'img'}, 
{'data': 'https://static.tacdn.com/img2/badges/20px/Appreciated.png', 
    'id': 'lazyload_-1977833463_22', 
    'logerror': False, 
    'priority': 100, 
    'scroll': False, 
    'tagType': 'img'}, 
{'data': 'https://static.tacdn.com/img2/icons/gray_flag.png', 
    'id': 'lazyload_-1977833463_23', 
    'logerror': False, 
    'priority': 100, 
    'scroll': True, 
    'tagType': 'img'}, 
{'data': 'https://media-cdn.tripadvisor.com/media/photo-l/01/2e/70/9f/avatar070.jpg', 
    'id': 'lazyload_-1977833463_24', 
    'logerror': False, 
    'priority': 100, 
    'scroll': True, 
    'tagType': 'img'}, 
{'data': 'https://static.tacdn.com/img2/badges/20px/lvl_02.png', 
    'id': 'lazyload_-1977833463_25', 
    'logerror': False, 
    'priority': 100, 
    'scroll': True, 
    'tagType': 'img'}, 
{'data': 'https://static.tacdn.com/img2/badges/20px/rev_03.png', 
    'id': 'lazyload_-1977833463_26', 
    'logerror': False, 
    'priority': 100, 
    'scroll': True, 
    'tagType': 'img'}, 
{'data': 'https://static.tacdn.com/img2/badges/20px/Appreciated.png', 
    'id': 'lazyload_-1977833463_27', 
    'logerror': False, 
    'priority': 100, 
    'scroll': False, 
    'tagType': 'img'}, 
{'data': 'https://static.tacdn.com/img2/icons/gray_flag.png', 
    'id': 'lazyload_-1977833463_28', 
    'logerror': False, 
    'priority': 100, 
    'scroll': True, 
    'tagType': 'img'}, 
{'data': 'https://media-cdn.tripadvisor.com/media/photo-l/03/9f/a6/94/facebook-avatar.jpg', 
    'id': 'lazyload_-1977833463_29', 
    'logerror': False, 
    'priority': 100, 
    'scroll': True, 
    'tagType': 'img'}, 
{'data': 'https://static.tacdn.com/img2/badges/20px/lvl_04.png', 
    'id': 'lazyload_-1977833463_30', 
    'logerror': False, 
    'priority': 100, 
    'scroll': True, 
    'tagType': 'img'}, 
{'data': 'https://static.tacdn.com/img2/badges/20px/rev_05.png', 
    'id': 'lazyload_-1977833463_31', 
    'logerror': False, 
    'priority': 100, 
    'scroll': True, 
    'tagType': 'img'}, 
{'data': 'https://static.tacdn.com/img2/badges/20px/FunLover.png', 
    'id': 'lazyload_-1977833463_32', 
    'logerror': False, 
    'priority': 100, 
    'scroll': True, 
    'tagType': 'img'}, 
{'data': 'https://static.tacdn.com/img2/badges/20px/Appreciated.png', 
    'id': 'lazyload_-1977833463_33', 
    'logerror': False, 
    'priority': 100, 
    'scroll': False, 
    'tagType': 'img'}, 
{'data': 'https://static.tacdn.com/img2/icons/gray_flag.png', 
    'id': 'lazyload_-1977833463_34', 
    'logerror': False, 
    'priority': 100, 
    'scroll': True, 
    'tagType': 'img'}, 
{'data': 'https://media-cdn.tripadvisor.com/media/photo-l/06/f3/32/86/complsv.jpg', 
    'id': 'lazyload_-1977833463_35', 
    'logerror': False, 
    'priority': 100, 
    'scroll': True, 
    'tagType': 'img'}, 
{'data': 'https://static.tacdn.com/img2/badges/20px/lvl_04.png', 
    'id': 'lazyload_-1977833463_36', 
    'logerror': False, 
    'priority': 100, 
    'scroll': True, 
    'tagType': 'img'}, 
{'data': 'https://static.tacdn.com/img2/badges/20px/rev_05.png', 
    'id': 'lazyload_-1977833463_37', 
    'logerror': False, 
    'priority': 100, 
    'scroll': True, 
    'tagType': 'img'}, 
{'data': 'https://static.tacdn.com/img2/badges/20px/FunLover.png', 
    'id': 'lazyload_-1977833463_38', 
    'logerror': False, 
    'priority': 100, 
    'scroll': True, 
    'tagType': 'img'}, 
{'data': 'https://static.tacdn.com/img2/badges/20px/Appreciated.png', 
    'id': 'lazyload_-1977833463_39', 
    'logerror': False, 
    'priority': 100, 
    'scroll': False, 
    'tagType': 'img'}, 
{'data': 'https://static.tacdn.com/img2/icons/gray_flag.png', 
    'id': 'lazyload_-1977833463_40', 
    'logerror': False, 
    'priority': 100, 
    'scroll': True, 
    'tagType': 'img'}, 
{'data': 'https://media-cdn.tripadvisor.com/media/photo-l/05/f2/4d/68/christine-n.jpg', 
    'id': 'lazyload_-1977833463_41', 
    'logerror': False, 
    'priority': 100, 
    'scroll': True, 
    'tagType': 'img'}, 
{'data': 'https://static.tacdn.com/img2/badges/20px/lvl_03.png', 
    'id': 'lazyload_-1977833463_42', 
    'logerror': False, 
    'priority': 100, 
    'scroll': True, 
    'tagType': 'img'}, 
{'data': 'https://static.tacdn.com/img2/badges/20px/rev_04.png', 
    'id': 'lazyload_-1977833463_43', 
    'logerror': False, 
    'priority': 100, 
    'scroll': True, 
    'tagType': 'img'}, 
{'data': 'https://static.tacdn.com/img2/badges/20px/FunLover.png', 
    'id': 'lazyload_-1977833463_44', 
    'logerror': False, 
    'priority': 100, 
    'scroll': True, 
    'tagType': 'img'}, 
{'data': 'https://static.tacdn.com/img2/badges/20px/Appreciated.png', 
    'id': 'lazyload_-1977833463_45', 
    'logerror': False, 
    'priority': 100, 
    'scroll': False, 
    'tagType': 'img'}, 
{'data': 'https://static.tacdn.com/img2/icons/gray_flag.png', 
    'id': 'lazyload_-1977833463_46', 
    'logerror': False, 
    'priority': 100, 
    'scroll': True, 
    'tagType': 'img'}, 
{'data': 'https://media-cdn.tripadvisor.com/media/photo-l/01/2e/70/80/avatar001.jpg', 
    'id': 'lazyload_-1977833463_47', 
    'logerror': False, 
    'priority': 100, 
    'scroll': True, 
    'tagType': 'img'}, 
{'data': 'https://static.tacdn.com/img2/badges/20px/lvl_03.png', 
    'id': 'lazyload_-1977833463_48', 
    'logerror': False, 
    'priority': 100, 
    'scroll': True, 
    'tagType': 'img'}, 
{'data': 'https://static.tacdn.com/img2/badges/20px/rev_04.png', 
    'id': 'lazyload_-1977833463_49', 
    'logerror': False, 
    'priority': 100, 
    'scroll': True, 
    'tagType': 'img'}, 
{'data': 'https://static.tacdn.com/img2/badges/20px/FunLover.png', 
    'id': 'lazyload_-1977833463_50', 
    'logerror': False, 
    'priority': 100, 
    'scroll': True, 
    'tagType': 'img'}, 
{'data': 'https://static.tacdn.com/img2/badges/20px/Appreciated.png', 
    'id': 'lazyload_-1977833463_51', 
    'logerror': False, 
    'priority': 100, 
    'scroll': False, 
    'tagType': 'img'}, 
{'data': 'https://static.tacdn.com/img2/icons/gray_flag.png', 
    'id': 'lazyload_-1977833463_52', 
    'logerror': False, 
    'priority': 100, 
    'scroll': True, 
    'tagType': 'img'}, 
{'data': 'https://media-cdn.tripadvisor.com/media/photo-l/0a/45/46/e2/tracey-g.jpg', 
    'id': 'lazyload_-1977833463_53', 
    'logerror': False, 
    'priority': 100, 
    'scroll': True, 
    'tagType': 'img'}, 
{'data': 'https://static.tacdn.com/img2/badges/20px/lvl_06.png', 
    'id': 'lazyload_-1977833463_54', 
    'logerror': False, 
    'priority': 100, 
    'scroll': True, 
    'tagType': 'img'}, 
{'data': 'https://static.tacdn.com/img2/badges/20px/rev_06.png', 
    'id': 'lazyload_-1977833463_55', 
    'logerror': False, 
    'priority': 100, 
    'scroll': True, 
    'tagType': 'img'}, 
{'data': 'https://static.tacdn.com/img2/badges/20px/FunLover.png', 
    'id': 'lazyload_-1977833463_56', 
    'logerror': False, 
    'priority': 100, 
    'scroll': True, 
    'tagType': 'img'}, 
{'data': 'https://static.tacdn.com/img2/badges/20px/Appreciated.png', 
    'id': 'lazyload_-1977833463_57', 
    'logerror': False, 
    'priority': 100, 
    'scroll': False, 
    'tagType': 'img'}, 
{'data': 'https://static.tacdn.com/img2/icons/gray_flag.png', 
    'id': 'lazyload_-1977833463_58', 
    'logerror': False, 
    'priority': 100, 
    'scroll': True, 
    'tagType': 'img'}, 
{'data': 'https://media-cdn.tripadvisor.com/media/photo-f/02/6d/40/b2/montreal-amphi-bus-tour.jpg', 
    'id': 'lazyload_-1977833463_59', 
    'logerror': False, 
    'priority': 100, 
    'scroll': True, 
    'tagType': 'img'}, 
{'data': 'https://media-cdn.tripadvisor.com/media/photo-l/01/39/2d/43/old-montreal-walking.jpg', 
    'id': 'lazyload_-1977833463_60', 
    'logerror': False, 
    'priority': 100, 
    'scroll': True, 
    'tagType': 'img'}, 
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출처

2016-10-03 10:07:16

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