1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
|
# SPDX-License-Identifier: AGPL-3.0-or-later
"""`Anna's Archive`_ is a free non-profit online shadow library metasearch
engine providing access to a variety of book resources (also via IPFS), created
by a team of anonymous archivists (AnnaArchivist_).
.. _Anna's Archive: https://annas-archive.org/
.. _AnnaArchivist: https://annas-software.org/AnnaArchivist/annas-archive
Configuration
=============
The engine has the following additional settings:
- :py:obj:`aa_content`
- :py:obj:`aa_ext`
- :py:obj:`aa_sort`
With this options a SearXNG maintainer is able to configure **additional**
engines for specific searches in Anna's Archive. For example a engine to search
for *newest* articles and journals (PDF) / by shortcut ``!aaa <search-term>``.
.. code:: yaml
- name: annas articles
engine: annas_archive
shortcut: aaa
aa_content: 'magazine'
aa_ext: 'pdf'
aa_sort: 'newest'
Implementations
===============
"""
import typing as t
from urllib.parse import urlencode
from lxml import html
from lxml.etree import ElementBase
from searx.utils import extract_text, eval_xpath, eval_xpath_getindex, eval_xpath_list
from searx.enginelib.traits import EngineTraits
from searx.data import ENGINE_TRAITS
from searx.exceptions import SearxEngineXPathException
from searx.result_types import EngineResults
if t.TYPE_CHECKING:
from searx.extended_types import SXNG_Response
# about
about: dict[str, t.Any] = {
"website": "https://annas-archive.org/",
"wikidata_id": "Q115288326",
"official_api_documentation": None,
"use_official_api": False,
"require_api_key": False,
"results": "HTML",
}
# engine dependent config
categories: list[str] = ["files"]
paging: bool = True
# search-url
base_url: str = "https://annas-archive.org"
aa_content: str = ""
"""Anan's search form field **Content** / possible values::
book_fiction, book_unknown, book_nonfiction,
book_comic, magazine, standards_document
To not filter use an empty string (default).
"""
aa_sort: str = ''
"""Sort Anna's results, possible values::
newest, oldest, largest, smallest
To sort by *most relevant* use an empty string (default)."""
aa_ext: str = ''
"""Filter Anna's results by a file ending. Common filters for example are
``pdf`` and ``epub``.
.. note::
Anna's Archive is a beta release: Filter results by file extension does not
really work on Anna's Archive.
"""
def init(engine_settings: dict[str, t.Any]) -> None: # pylint: disable=unused-argument
"""Check of engine's settings."""
traits = EngineTraits(**ENGINE_TRAITS['annas archive'])
if aa_content and aa_content not in traits.custom['content']:
raise ValueError(f'invalid setting content: {aa_content}')
if aa_sort and aa_sort not in traits.custom['sort']:
raise ValueError(f'invalid setting sort: {aa_sort}')
if aa_ext and aa_ext not in traits.custom['ext']:
raise ValueError(f'invalid setting ext: {aa_ext}')
def request(query: str, params: dict[str, t.Any]) -> None:
lang = traits.get_language(params["language"], traits.all_locale)
args = {
'lang': lang,
'content': aa_content,
'ext': aa_ext,
'sort': aa_sort,
'q': query,
'page': params['pageno'],
}
# filter out None and empty values
filtered_args = dict((k, v) for k, v in args.items() if v)
params["url"] = f"{base_url}/search?{urlencode(filtered_args)}"
def response(resp: "SXNG_Response") -> EngineResults:
res = EngineResults()
dom = html.fromstring(resp.text)
# The rendering of the WEB page is strange; positions of Anna's result page
# are enclosed in SGML comments. These comments are *uncommented* by some
# JS code, see query of class '.js-scroll-hidden' in Anna's HTML template:
# https://annas-software.org/AnnaArchivist/annas-archive/-/blob/main/allthethings/templates/macros/md5_list.html
for item in eval_xpath_list(dom, '//main//div[contains(@class, "js-aarecord-list-outer")]/div'):
try:
kwargs: dict[str, t.Any] = _get_result(item)
except SearxEngineXPathException:
continue
res.add(res.types.LegacyResult(**kwargs))
return res
def _get_result(item: ElementBase) -> dict[str, t.Any]:
return {
'template': 'paper.html',
'url': base_url + eval_xpath_getindex(item, './a/@href', 0),
'title': extract_text(eval_xpath(item, './div//a[starts-with(@href, "/md5")]')),
'authors': [extract_text(eval_xpath_getindex(item, './/a[starts-with(@href, "/search")]', 0))],
'publisher': extract_text(
eval_xpath_getindex(item, './/a[starts-with(@href, "/search")]', 1, default=None), allow_none=True
),
'content': extract_text(eval_xpath(item, './/div[contains(@class, "relative")]')),
'thumbnail': extract_text(eval_xpath_getindex(item, './/img/@src', 0, default=None), allow_none=True),
}
def fetch_traits(engine_traits: EngineTraits):
"""Fetch languages and other search arguments from Anna's search form."""
# pylint: disable=import-outside-toplevel
import babel
from searx.network import get # see https://github.com/searxng/searxng/issues/762
from searx.locales import language_tag
engine_traits.all_locale = ''
engine_traits.custom['content'] = []
engine_traits.custom['ext'] = []
engine_traits.custom['sort'] = []
resp = get(base_url + '/search')
if not resp.ok:
raise RuntimeError("Response from Anna's search page is not OK.")
dom = html.fromstring(resp.text)
# supported language codes
lang_map = {}
for x in eval_xpath_list(dom, "//form//input[@name='lang']"):
eng_lang = x.get("value")
if eng_lang in ('', '_empty', 'nl-BE', 'und') or eng_lang.startswith('anti__'):
continue
try:
locale = babel.Locale.parse(lang_map.get(eng_lang, eng_lang), sep='-')
except babel.UnknownLocaleError:
# silently ignore unknown languages
# print("ERROR: %s -> %s is unknown by babel" % (x.get("data-name"), eng_lang))
continue
sxng_lang = language_tag(locale)
conflict = engine_traits.languages.get(sxng_lang)
if conflict:
if conflict != eng_lang:
print("CONFLICT: babel %s --> %s, %s" % (sxng_lang, conflict, eng_lang))
continue
engine_traits.languages[sxng_lang] = eng_lang
for x in eval_xpath_list(dom, "//form//input[@name='content']"):
if not x.get("value").startswith("anti__"):
engine_traits.custom['content'].append(x.get("value"))
for x in eval_xpath_list(dom, "//form//input[@name='ext']"):
if not x.get("value").startswith("anti__"):
engine_traits.custom['ext'].append(x.get("value"))
for x in eval_xpath_list(dom, "//form//select[@name='sort']//option"):
engine_traits.custom['sort'].append(x.get("value"))
# for better diff; sort the persistence of these traits
engine_traits.custom['content'].sort()
engine_traits.custom['ext'].sort()
engine_traits.custom['sort'].sort()
|
