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[enh] bing_images: use data from embedded JSON to improve results (e.g. real page title) (#1568)

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use data from embedded JSON to improve results (e.g. real page title), add image format and source info (see PR #1567), improve paging logic (it now works)
This commit is contained in:
Frank de Lange 2019-07-27 08:22:02 +02:00 committed by Alexandre Flament
parent f34b5cedb1
commit 11fc9913e9
2 changed files with 48 additions and 35 deletions
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61
searx/engines/bing_images.py
View file

@ -10,9 +10,6 @@
@stable no (HTML can change)
@parse url, title, img_src
@todo currently there are up to 35 images receive per page,
because bing does not parse count=10.
limited response to 10 images
"""
from lxml import html
@ -28,10 +25,15 @@ safesearch = True
time_range_support = True
language_support = True
supported_languages_url = 'https://www.bing.com/account/general'
number_of_results = 28
# search-url
base_url = 'https://www.bing.com/'
search_string = 'images/search?{query}&count=10&first={offset}'
search_string = 'images/search'\
'?{query}'\
'&count={count}'\
'&first={first}'\
'&FORM=IBASEP'
time_range_string = '&qft=+filterui:age-lt{interval}'
time_range_dict = {'day': '1440',
'week': '10080',
@ -44,16 +46,14 @@ safesearch_types = {2: 'STRICT',
0: 'OFF'}
_quote_keys_regex = re.compile('({|,)([a-z][a-z0-9]*):(")', re.I | re.U)
# do search-request
def request(query, params):
offset = (params['pageno'] - 1) * 10 + 1
offset = ((params['pageno'] - 1) * number_of_results) + 1
search_path = search_string.format(
query=urlencode({'q': query}),
offset=offset)
count=number_of_results,
first=offset)
language = match_language(params['language'], supported_languages, language_aliases).lower()
@ -77,32 +77,31 @@ def response(resp):
dom = html.fromstring(resp.text)
# parse results
for result in dom.xpath('//div[@id="mmComponent_images_1"]/ul/li/div/div[@class="imgpt"]'):
link = result.xpath('./a')[0]
for result in dom.xpath('//div[@class="imgpt"]'):
# TODO find actual title
title = link.xpath('.//img/@alt')[0]
img_format = result.xpath('./div[contains(@class, "img_info")]/span/text()')[0]
# Microsoft seems to experiment with this code so don't make the path too specific,
# just catch the text section for the first anchor in img_info assuming this to be
# the originating site.
source = result.xpath('./div[contains(@class, "img_info")]//a/text()')[0]
# parse json-data (it is required to add a space, to make it parsable)
json_data = loads(_quote_keys_regex.sub(r'\1"\2": \3', link.attrib.get('m')))
try:
m = loads(result.xpath('./a/@m')[0])
url = json_data.get('purl')
img_src = json_data.get('murl')
thumbnail = json_data.get('turl')
# strip 'Unicode private use area' highlighting, they render to Tux
# the Linux penguin and a standing diamond on my machine...
title = m.get('t', '').replace(u'\ue000', '').replace(u'\ue001', '')
results.append({'template': 'images.html',
'url': m['purl'],
'thumbnail_src': m['turl'],
'img_src': m['murl'],
'content': '',
'title': title,
'source': source,
'img_format': img_format})
except:
continue
# append result
results.append({'template': 'images.html',
'url': url,
'title': title,
'content': '',
'thumbnail_src': thumbnail,
'img_src': img_src})
# TODO stop parsing if 10 images are found
# if len(results) >= 10:
# break
# return results
return results

22
tests/unit/engines/test_bing_images.py
View file

@ -53,17 +53,25 @@ class TestBingImagesEngine(SearxTestCase):
<li>
<div>
<div class="imgpt">
<a m='{"purl":"page_url","murl":"img_url","turl":"thumb_url"}'>
<a m='{"purl":"page_url","murl":"img_url","turl":"thumb_url","t":"Page 1 title"}'>
<img src="" alt="alt text" />
</a>
<div class="img_info">
<span>1 x 1 - jpeg</span>
<a>1.example.org</a>
</div>
</div>
<div></div>
</div>
<div>
<div class="imgpt">
<a m='{"purl":"page_url2","murl":"img_url2","turl":"thumb_url2"}'>
<a m='{"purl":"page_url2","murl":"img_url2","turl":"thumb_url2","t":"Page 2 title"}'>
<img src="" alt="alt text 2" />
</a>
<div class="img_info">
<span>2 x 2 - jpeg</span>
<a>2.example.org</a>
</div>
</div>
</div>
</li>
@ -72,9 +80,13 @@ class TestBingImagesEngine(SearxTestCase):
<li>
<div>
<div class="imgpt">
<a m='{"purl":"page_url3","murl":"img_url3","turl":"thumb_url3"}'>
<a m='{"purl":"page_url3","murl":"img_url3","turl":"thumb_url3","t":"Page 3 title"}'>
<img src="" alt="alt text 3" />
</a>
<div class="img_info">
<span>3 x 3 - jpeg</span>
<a>3.example.org</a>
</div>
</div>
</div>
</li>
@ -86,11 +98,13 @@ class TestBingImagesEngine(SearxTestCase):
results = bing_images.response(response)
self.assertEqual(type(results), list)
self.assertEqual(len(results), 3)
self.assertEqual(results[0]['title'], 'alt text')
self.assertEqual(results[0]['title'], 'Page 1 title')
self.assertEqual(results[0]['url'], 'page_url')
self.assertEqual(results[0]['content'], '')
self.assertEqual(results[0]['thumbnail_src'], 'thumb_url')
self.assertEqual(results[0]['img_src'], 'img_url')
self.assertEqual(results[0]['img_format'], '1 x 1 - jpeg')
self.assertEqual(results[0]['source'], '1.example.org')
def test_fetch_supported_languages(self):
html = """