mirror of
https://github.com/searxng/searxng.git
synced 2024-11-22 12:10:11 +01:00
142 lines
4.2 KiB
Python
142 lines
4.2 KiB
Python
# SPDX-License-Identifier: AGPL-3.0-or-later
|
|
"""Wolfram|Alpha (Science)
|
|
|
|
"""
|
|
|
|
from urllib.parse import urlencode
|
|
|
|
from lxml import etree
|
|
|
|
# about
|
|
about = {
|
|
"website": 'https://www.wolframalpha.com',
|
|
"wikidata_id": 'Q207006',
|
|
"official_api_documentation": 'https://products.wolframalpha.com/api/',
|
|
"use_official_api": True,
|
|
"require_api_key": False,
|
|
"results": 'XML',
|
|
}
|
|
|
|
# search-url
|
|
search_url = 'https://api.wolframalpha.com/v2/query?appid={api_key}&{query}'
|
|
site_url = 'https://www.wolframalpha.com/input/?{query}'
|
|
api_key = '' # defined in settings.yml
|
|
|
|
# xpath variables
|
|
failure_xpath = '/queryresult[attribute::success="false"]'
|
|
input_xpath = '//pod[starts-with(attribute::id, "Input")]/subpod/plaintext'
|
|
pods_xpath = '//pod'
|
|
subpods_xpath = './subpod'
|
|
pod_primary_xpath = './@primary'
|
|
pod_id_xpath = './@id'
|
|
pod_title_xpath = './@title'
|
|
plaintext_xpath = './plaintext'
|
|
image_xpath = './img'
|
|
img_src_xpath = './@src'
|
|
img_alt_xpath = './@alt'
|
|
|
|
# pods to display as image in infobox
|
|
# this pods do return a plaintext, but they look better and are more useful as images
|
|
image_pods = {'VisualRepresentation', 'Illustration'}
|
|
|
|
|
|
# do search-request
|
|
def request(query, params):
|
|
params['url'] = search_url.format(query=urlencode({'input': query}), api_key=api_key)
|
|
params['headers']['Referer'] = site_url.format(query=urlencode({'i': query}))
|
|
|
|
return params
|
|
|
|
|
|
# replace private user area characters to make text legible
|
|
def replace_pua_chars(text):
|
|
pua_chars = {
|
|
'\uf522': '\u2192', # right arrow
|
|
'\uf7b1': '\u2115', # set of natural numbers
|
|
'\uf7b4': '\u211a', # set of rational numbers
|
|
'\uf7b5': '\u211d', # set of real numbers
|
|
'\uf7bd': '\u2124', # set of integer numbers
|
|
'\uf74c': 'd', # differential
|
|
'\uf74d': '\u212f', # euler's number
|
|
'\uf74e': 'i', # imaginary number
|
|
'\uf7d9': '=',
|
|
} # equals sign
|
|
|
|
for k, v in pua_chars.items():
|
|
text = text.replace(k, v)
|
|
|
|
return text
|
|
|
|
|
|
# get response from search-request
|
|
def response(resp):
|
|
results = []
|
|
|
|
search_results = etree.XML(resp.content)
|
|
|
|
# return empty array if there are no results
|
|
if search_results.xpath(failure_xpath):
|
|
return []
|
|
|
|
try:
|
|
infobox_title = search_results.xpath(input_xpath)[0].text
|
|
except: # pylint: disable=bare-except
|
|
infobox_title = ""
|
|
|
|
pods = search_results.xpath(pods_xpath)
|
|
result_chunks = []
|
|
result_content = ""
|
|
for pod in pods:
|
|
pod_id = pod.xpath(pod_id_xpath)[0]
|
|
pod_title = pod.xpath(pod_title_xpath)[0]
|
|
pod_is_result = pod.xpath(pod_primary_xpath)
|
|
|
|
subpods = pod.xpath(subpods_xpath)
|
|
if not subpods:
|
|
continue
|
|
|
|
# Appends either a text or an image, depending on which one is more suitable
|
|
for subpod in subpods:
|
|
content = subpod.xpath(plaintext_xpath)[0].text
|
|
image = subpod.xpath(image_xpath)
|
|
|
|
if content and pod_id not in image_pods:
|
|
|
|
if pod_is_result or not result_content:
|
|
if pod_id != "Input":
|
|
result_content = "%s: %s" % (pod_title, content)
|
|
|
|
# if no input pod was found, title is first plaintext pod
|
|
if not infobox_title:
|
|
infobox_title = content
|
|
|
|
content = replace_pua_chars(content)
|
|
result_chunks.append({'label': pod_title, 'value': content})
|
|
|
|
elif image:
|
|
result_chunks.append(
|
|
{
|
|
'label': pod_title,
|
|
'image': {'src': image[0].xpath(img_src_xpath)[0], 'alt': image[0].xpath(img_alt_xpath)[0]},
|
|
}
|
|
)
|
|
|
|
if not result_chunks:
|
|
return []
|
|
|
|
title = "Wolfram Alpha (%s)" % infobox_title
|
|
|
|
# append infobox
|
|
results.append(
|
|
{
|
|
'infobox': infobox_title,
|
|
'attributes': result_chunks,
|
|
'urls': [{'title': 'Wolfram|Alpha', 'url': resp.request.headers['Referer']}],
|
|
}
|
|
)
|
|
|
|
# append link to site
|
|
results.append({'url': resp.request.headers['Referer'], 'title': title, 'content': result_content})
|
|
|
|
return results
|