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Fix bing page numbering, add sc to parameter, minor refactor 

Bing page numbering doesn't increase by 10 each time. The first page returns 10 results, and all pages thereafter return 14 results. This means we need to update the page numbering

Next, the 'sc' parameter, whatever it means, needs to be present in order to not return the same results.

Finally, the code to check the page had some duplicate checks, so I refactored the code in this section which is low-risk.
This commit is contained in:
Grant Lanham 2024-04-23 21:03:51 -04:00
parent af3be2b12b
commit 2b48584bb4
1 changed files with 16 additions and 6 deletions
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22
searx/engines/bing.py
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@ -72,7 +72,16 @@ base_url = 'https://www.bing.com/search'
def _page_offset(pageno): def _page_offset(pageno):
return (int(pageno) - 1) * 10 + 1 """
Page 1 => 1 (returns 10 results)
Page 2 => 11 (returns 14 results)
Page 3 => 25 (returns 14 results)
Page 4 => 39 (returns 14 results)
"""
pageno_int = int(pageno)
if pageno_int <= 1:
return 1
return 11 + (pageno_int - 2) * 14
def set_bing_cookies(params, engine_language, engine_region): def set_bing_cookies(params, engine_language, engine_region):
@ -95,18 +104,19 @@ def request(query, params):
# don't ask why it is only sometimes / its M$ and they have never been # don't ask why it is only sometimes / its M$ and they have never been
# deterministic ;) # deterministic ;)
'pq': query, 'pq': query,
# Unsure meaning of sc, but breaks bing if not present
'sc': '0-0',
} }
# To get correct page, arg first and this arg FORM is needed, the value PERE # To get correct page, arg first and this arg FORM is needed, the value PERE
# is on page 2, on page 3 its PERE1 and on page 4 its PERE2 .. and so forth. # is on page 2, on page 3 its PERE1 and on page 4 its PERE2 .. and so forth.
# The 'first' arg should never send on page 1. # The 'first' arg should never send on page 1.
if page > 1: if page > 1:
query_params['first'] = _page_offset(page) # see also arg FORM query_params['first'] = _page_offset(page) # see also arg FORM
if page == 2: if page == 2:
query_params['FORM'] = 'PERE' query_params['FORM'] = 'PERE'
elif page > 2: else: # page > 2:
query_params['FORM'] = 'PERE%s' % (page - 2) query_params['FORM'] = 'PERE%s' % (page - 2)
params['url'] = f'{base_url}?{urlencode(query_params)}' params['url'] = f'{base_url}?{urlencode(query_params)}'