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[fix] duckduckgo lite engine: set HTTP header 'Referer'
We have had problems with this before, the bot protection from ddg-lite seems to
have included this referer in the rating [1][2].
From reverse engineering:
- The Referer ``https://google.com/`` was set in commt 257dc7d6c4
--> DDG lite
does not like this referer anymore!
- The 'Referer' header is only set on second and follow up pages but not on the
first page
- The vqd value is not needed on the first page, the ddg-lite client sets this
value only on follow up pages / this can help to reduce the vqd requests from
SearXNG.
Related to 'Referer' header & ddg requests:
[1] https://github.com/searxng/searxng/pull/2161
[2] https://github.com/searxng/searxng/pull/2081
Closes: https://github.com/searxng/searxng/issues/2796
Signed-off-by: Markus Heiser <markus.heiser@darmarit.de>
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@ -222,7 +222,6 @@ def request(query, params):
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# link again and again ..
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params['headers']['Content-Type'] = 'application/x-www-form-urlencoded'
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params['headers']['Referer'] = 'https://google.com/'
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# initial page does not have an offset
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if params['pageno'] == 2:
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@ -248,6 +247,10 @@ def request(query, params):
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params['data']['nextParams'] = form_data.get('nextParams', '')
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params['data']['v'] = form_data.get('v', 'l')
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# request needs a vqd argument
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params['data']['vqd'] = get_vqd(query)
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params['headers']['Referer'] = 'https://lite.duckduckgo.com/'
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params['data']['kl'] = eng_region
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params['cookies']['kl'] = eng_region
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