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# SPDX-License-Identifier: AGPL-3.0-or-later
"""Search radio stations from RadioBrowser by `Advanced station search API`_.
.. _Advanced station search API:
https://de1.api.radio-browser.info/#Advanced_station_search
"""
import random
import socket
from urllib.parse import urlencode
import babel
from flask_babel import gettext
from searx.network import get
from searx.enginelib import EngineCache
from searx.enginelib.traits import EngineTraits
from searx.locales import language_tag
about = {
"website": 'https://www.radio-browser.info/',
"wikidata_id": 'Q111664849',
"official_api_documentation": 'https://de1.api.radio-browser.info/',
"use_official_api": True,
"require_api_key": False,
"results": 'JSON',
}
paging = True
categories = ['music', 'radio']
number_of_results = 10
station_filters = [] # ['countrycode', 'language']
"""A list of filters to be applied to the search of radio stations. By default
none filters are applied. Valid filters are:
``language``
Filter stations by selected language. For instance the ``de`` from ``:de-AU``
will be translated to `german` and used in the argument ``language=``.
``countrycode``
Filter stations by selected country. The 2-digit countrycode of the station
comes from the region the user selected. For instance ``:de-AU`` will filter
out all stations not in ``AU``.
.. note::
RadioBrowser has registered a lot of languages and countrycodes unknown to
:py:obj:`babel` and note that when searching for radio stations, users are
more likely to search by name than by region or language.
"""
CACHE: EngineCache
"""Persistent (SQLite) key/value cache that deletes its values after ``expire``
seconds."""
def init(_):
global CACHE # pylint: disable=global-statement
CACHE = EngineCache("radio_browser")
server_list()
def server_list() -> list[str]:
servers = CACHE.get("servers", [])
if servers:
return servers
# hint: can take up to 40sec!
ips = socket.getaddrinfo("all.api.radio-browser.info", 80, 0, 0, socket.IPPROTO_TCP)
for ip_tuple in ips:
_ip: str = ip_tuple[4][0] # type: ignore
url = socket.gethostbyaddr(_ip)[0]
srv = "https://" + url
if srv not in servers:
servers.append(srv)
# update server list once in 24h
CACHE.set(key="servers", value=servers, expire=60 * 60 * 24)
return servers
def request(query, params):
servers = server_list()
if not servers:
logger.error("Fetched server list is empty!")
params["url"] = None
return
server = random.choice(servers)
args = {
'name': query,
'order': 'votes',
'offset': (params['pageno'] - 1) * number_of_results,
'limit': number_of_results,
'hidebroken': 'true',
'reverse': 'true',
}
if 'language' in station_filters:
lang = traits.get_language(params['searxng_locale']) # type: ignore
if lang:
args['language'] = lang
if 'countrycode' in station_filters:
if len(params['searxng_locale'].split('-')) > 1:
countrycode = params['searxng_locale'].split('-')[-1].upper()
if countrycode in traits.custom['countrycodes']: # type: ignore
args['countrycode'] = countrycode
params['url'] = f"{server}/json/stations/search?{urlencode(args)}"
def response(resp):
results = []
json_resp = resp.json()
for result in json_resp:
url = result['homepage']
if not url:
url = result['url_resolved']
content = []
tags = ', '.join(result.get('tags', '').split(','))
if tags:
content.append(tags)
for x in ['state', 'country']:
v = result.get(x)
if v:
v = str(v).strip()
content.append(v)
metadata = []
codec = result.get('codec')
if codec and codec.lower() != 'unknown':
metadata.append(f'{codec} ' + gettext('radio'))
for x, y in [
(gettext('bitrate'), 'bitrate'),
(gettext('votes'), 'votes'),
(gettext('clicks'), 'clickcount'),
]:
v = result.get(y)
if v:
v = str(v).strip()
metadata.append(f"{x} {v}")
results.append(
{
'url': url,
'title': result['name'],
'thumbnail': result.get('favicon', '').replace("http://", "https://"),
'content': ' | '.join(content),
'metadata': ' | '.join(metadata),
'iframe_src': result['url_resolved'].replace("http://", "https://"),
}
)
return results
def fetch_traits(engine_traits: EngineTraits):
"""Fetch languages and countrycodes from RadioBrowser
- ``traits.languages``: `list of languages API`_
- ``traits.custom['countrycodes']``: `list of countries API`_
.. _list of countries API: https://de1.api.radio-browser.info/#List_of_countries
.. _list of languages API: https://de1.api.radio-browser.info/#List_of_languages
"""
# pylint: disable=import-outside-toplevel
init(None)
from babel.core import get_global
babel_reg_list = get_global("territory_languages").keys()
server = server_list()[0]
language_list = get(f'{server}/json/languages').json() # type: ignore
country_list = get(f'{server}/json/countries').json() # type: ignore
for lang in language_list:
babel_lang = lang.get('iso_639')
if not babel_lang:
# the language doesn't have any iso code, and hence can't be parsed
# print(f"ERROR: lang - no iso code in {lang}")
continue
try:
sxng_tag = language_tag(babel.Locale.parse(babel_lang, sep="-"))
except babel.UnknownLocaleError:
# print(f"ERROR: language tag {babel_lang} is unknown by babel")
continue
eng_tag = lang['name']
conflict = engine_traits.languages.get(sxng_tag)
if conflict:
if conflict != eng_tag:
print("CONFLICT: babel %s --> %s, %s" % (sxng_tag, conflict, eng_tag))
continue
engine_traits.languages[sxng_tag] = eng_tag
countrycodes = set()
for region in country_list:
# country_list contains duplicates that differ only in upper/lower case
_reg = region['iso_3166_1'].upper()
if _reg not in babel_reg_list:
print(f"ERROR: region tag {region['iso_3166_1']} is unknown by babel")
continue
countrycodes.add(_reg)
countrycodes = list(countrycodes)
countrycodes.sort()
engine_traits.custom['countrycodes'] = countrycodes
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