searxng/searx/engines/presearch.py
Markus Heiser 44392bd436 [mod] improve implementation of presearch engine
Signed-off-by: Markus Heiser <markus.heiser@darmarit.de>
2023-11-27 14:16:42 +01:00

180 lines
5.5 KiB
Python

# SPDX-License-Identifier: AGPL-3.0-or-later
# lint: pylint
"""Presearch (general, images, videos, news)
.. hint::
The results in the video category are most often links to pages that contain
a video, for instance many links from preasearch's video category link
content from facebook (aka Meta) or Twitter (aka X). Since these are not
real links to video streams SearXNG can't use the video template for this and
if SearXNG can't use this template, then the user doesn't want to see these
hits in the videos category.
TL;DR; by default presearch's video category is placed into categories::
categories: [general, web]
"""
from urllib.parse import urlencode
from searx.network import get
from searx.utils import gen_useragent, html_to_text
about = {
"website": "https://presearch.io",
"wikidiata_id": "Q7240905",
"official_api_documentation": "https://docs.presearch.io/nodes/api",
"use_official_api": False,
"require_api_key": False,
"results": "JSON",
}
paging = True
time_range_support = True
categories = ["general", "web"] # general, images, videos, news
search_type = "search"
"""must be any of ``search``, ``images``, ``videos``, ``news``"""
base_url = "https://presearch.com"
safesearch_map = {0: 'false', 1: 'true', 2: 'true'}
def init(_):
if search_type not in ['search', 'images', 'videos', 'news']:
raise ValueError(f'presearch search_type: {search_type}')
def _get_request_id(query, page, time_range, safesearch):
args = {
"q": query,
"page": page,
}
if time_range:
args["time_range"] = time_range
url = f"{base_url}/{search_type}?{urlencode(args)}"
headers = {
'User-Agent': gen_useragent(),
'Cookie': f"b=1;presearch_session=;use_safe_search={safesearch_map[safesearch]}",
}
resp_text = get(url, headers=headers).text # type: ignore
for line in resp_text.split("\n"):
if "window.searchId = " in line:
return line.split("= ")[1][:-1].replace('"', "")
return None
def request(query, params):
request_id = _get_request_id(query, params["pageno"], params["time_range"], params["safesearch"])
params["headers"]["Accept"] = "application/json"
params["url"] = f"{base_url}/results?id={request_id}"
return params
def _strip_leading_strings(text):
for x in ['wikipedia', 'google']:
if text.lower().endswith(x):
text = text[: -len(x)]
return text.strip()
def parse_search_query(json_results):
results = []
for item in json_results.get('specialSections', {}).get('topStoriesCompact', {}).get('data', []):
result = {
'url': item['link'],
'title': item['title'],
'img_src': item['image'],
'content': '',
'metadata': item.get('source'),
}
results.append(result)
for item in json_results.get('standardResults', []):
result = {
'url': item['link'],
'title': item['title'],
'content': html_to_text(item['description']),
}
results.append(result)
info = json_results.get('infoSection', {}).get('data')
if info:
attributes = []
for item in info.get('about', []):
label, value = html_to_text(item).split(':', 1)
value = _strip_leading_strings(value)
attributes.append({'label': label, 'value': value})
content = []
for item in [info['subtitle'], info['description']]:
item = _strip_leading_strings(html_to_text(item))
if item:
content.append(item)
results.append(
{
'infobox': info['title'],
'id': info['title'],
'img_src': info.get('image'),
'content': ' | '.join(content),
'attributes': attributes,
}
)
return results
def response(resp):
results = []
json_resp = resp.json()
if search_type == 'search':
results = parse_search_query(json_resp['results'])
elif search_type == 'images':
for item in json_resp['images']:
results.append(
{
'template': 'images.html',
'title': item['title'],
'url': item['link'],
'img_src': item['image'],
'thumbnail_src': item['thumbnail'],
}
)
elif search_type == 'videos':
# The results in the video category are most often links to pages that contain
# a video and not to a video stream --> SearXNG can't use the video template.
for item in json_resp['videos']:
metadata = [x for x in [item.get('description'), item.get('duration')] if x]
results.append(
{
'title': item['title'],
'url': item['link'],
'content': '',
'metadata': ' / '.join(metadata),
'img_src': item.get('image'),
}
)
elif search_type == 'news':
for item in json_resp['news']:
metadata = [x for x in [item.get('source'), item.get('time')] if x]
results.append(
{
'title': item['title'],
'url': item['link'],
'content': item['description'],
'metadata': ' / '.join(metadata),
'img_src': item.get('image'),
}
)
return results