[feat] autocomplete: add bing autocompleter

docs/admin/settings/settings_search.rst

@@ -36,6 +36,7 @@
 
   - ``360search``
   - ``baidu``
+  - ``bing``
   - ``brave``
   - ``dbpedia``
   - ``duckduckgo``

searx/autocomplete.py

@@ -1,6 +1,9 @@
 # SPDX-License-Identifier: AGPL-3.0-or-later
 """This module implements functions needed for the autocompleter."""
+
 # pylint: disable=use-dict-literal
+import string
+import random
 
 import json
 import typing as t
@@ -53,6 +56,26 @@ def baidu(query: str, _sxng_locale: str) -> list[str]:
     return results
 
 
+def bing(query: str, _sxng_locale: str) -> list[str]:
+    # bing search autocompleter
+    base_url = "https://www.bing.com/AS/Suggestions?"
+    # cvid has to be a 32 character long string consisting of numbers and uppsercase characters
+    cvid = ''.join(random.choice(string.ascii_uppercase + string.digits) for _ in range(32))
+    response = get(base_url + urlencode({'qry': query, 'csr': 1, 'cvid': cvid}))
+    results: list[str] = []
+
+    if response.ok:
+        data: dict[str, t.Any] = response.json()
+        if 's' in data:
+            for item in data['s']:
+                completion: str = item['q']
+                # bing uses PUA unicode characters to highlight parts of the query
+                # we have to remove these manually (U+E000 and U+E001)
+                completion = completion.replace("\ue000", "").replace("\ue001", "")
+                results.append(completion)
+    return results
+
+
 def brave(query: str, _sxng_locale: str) -> list[str]:
     # brave search autocompleter
     url = 'https://search.brave.com/api/suggest?'
@@ -331,6 +354,7 @@ def yandex(query: str, _sxng_locale: str) -> list[str]:
 backends: dict[str, t.Callable[[str, str], list[str]]] = {
     '360search': qihu360search,
     'baidu': baidu,
+    'bing': bing,
     'brave': brave,
     'dbpedia': dbpedia,
     'duckduckgo': duckduckgo,

searx/settings.yml

@@ -32,8 +32,8 @@ brand:
 search:
   # Filter results. 0: None, 1: Moderate, 2: Strict
   safe_search: 0
-  # Existing autocomplete backends: "360search", "baidu", "brave", "dbpedia", "duckduckgo", "google", "yandex",
+  # Existing autocomplete backends: "360search", "baidu", "bing", "brave", "dbpedia", "duckduckgo", "google",
-  # "mwmbl", "naver", "seznam", "sogou", "startpage", "swisscows", "quark", "qwant", "wikipedia" -
+  # "yandex", "mwmbl", "naver", "seznam", "sogou", "startpage", "swisscows", "quark", "qwant", "wikipedia" -
   # leave blank to turn it off by default.
   autocomplete: ""
   # minimun characters to type before autocompleter starts