[enh] py: drop deps (#5407)

The difference between decompression with brotli or gzip in HTML files is
negligible for 3 MB of compiled binary package.

Introduced in https://github.com/searxng/searxng/commit/eaa694fb7d0e47b943bc6d6edb6cb6a40ab2d85e

Closes https://github.com/searxng/searxng/security/code-scanning/276
Closes https://github.com/searxng/searxng/security/dependabot/37

7 files changed, 2 insertions, 34 deletions

diff --git a/searx/__init__.py b/searx/__init__.py
index 5ee367d70..8977bac67 100644
--- a/searx/__init__.py
+++ b/searx/__init__.py
@@ -10,7 +10,6 @@ from os.path import dirname, abspath
 import logging
 
 import msgspec
-import searx.unixthreadname  # pylint: disable=unused-import
 
 # Debug
 LOG_FORMAT_DEBUG: str = '%(levelname)-7s %(name)-30.30s: %(message)s'
diff --git a/searx/engines/bing.py b/searx/engines/bing.py
index a359ccdfd..4a1934a2d 100644
--- a/searx/engines/bing.py
+++ b/searx/engines/bing.py
@@ -201,7 +201,6 @@ def fetch_traits(engine_traits: EngineTraits):
         "User-Agent": gen_useragent(),
         "Accept": "text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,*/*;q=0.8",
         "Accept-Language": "en-US;q=0.5,en;q=0.3",
-        "Accept-Encoding": "gzip, deflate, br",
         "DNT": "1",
         "Connection": "keep-alive",
         "Upgrade-Insecure-Requests": "1",
diff --git a/searx/engines/brave.py b/searx/engines/brave.py
index c1148b889..fe8fb616b 100644
--- a/searx/engines/brave.py
+++ b/searx/engines/brave.py
@@ -198,9 +198,6 @@ time_range_map: dict[str, str] = {
 
 def request(query: str, params: dict[str, t.Any]) -> None:
 
-    # Don't accept br encoding / see https://github.com/searxng/searxng/pull/1787
-    params['headers']['Accept-Encoding'] = 'gzip, deflate'
-
     args: dict[str, t.Any] = {
         'q': query,
         'source': 'web',
@@ -436,14 +433,11 @@ def fetch_traits(engine_traits: EngineTraits):
 
     engine_traits.custom["ui_lang"] = {}
 
-    headers = {
-        'Accept-Encoding': 'gzip, deflate',
-    }
     lang_map = {'no': 'nb'}  # norway
 
     # languages (UI)
 
-    resp = get('https://search.brave.com/settings', headers=headers)
+    resp = get('https://search.brave.com/settings')
 
     if not resp.ok:  # type: ignore
         print("ERROR: response from Brave is not OK.")
@@ -472,7 +466,7 @@ def fetch_traits(engine_traits: EngineTraits):
 
     # search regions of brave
 
-    resp = get('https://cdn.search.brave.com/serp/v2/_app/immutable/chunks/parameters.734c106a.js', headers=headers)
+    resp = get('https://cdn.search.brave.com/serp/v2/_app/immutable/chunks/parameters.734c106a.js')
 
     if not resp.ok:  # type: ignore
         print("ERROR: response from Brave is not OK.")
diff --git a/searx/engines/tineye.py b/searx/engines/tineye.py
index 0dbea0fc1..2150e8f59 100644
--- a/searx/engines/tineye.py
+++ b/searx/engines/tineye.py
@@ -73,7 +73,6 @@ def request(query, params):
     params['headers'].update(
         {
             'Connection': 'keep-alive',
-            'Accept-Encoding': 'gzip, defalte, br',
             'Host': 'tineye.com',
             'DNT': '1',
             'TE': 'trailers',
diff --git a/searx/search/checker/impl.py b/searx/search/checker/impl.py
index cf1f03449..354cbadc7 100644
--- a/searx/search/checker/impl.py
+++ b/searx/search/checker/impl.py
@@ -82,7 +82,6 @@ def _download_and_check_if_image(image_url: str) -> bool:
                     'User-Agent': gen_useragent(),
                     'Accept': 'text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,*/*;q=0.8',
                     'Accept-Language': 'en-US;q=0.5,en;q=0.3',
-                    'Accept-Encoding': 'gzip, deflate, br',
                     'DNT': '1',
                     'Connection': 'keep-alive',
                     'Upgrade-Insecure-Requests': '1',
diff --git a/searx/unixthreadname.py b/searx/unixthreadname.py
deleted file mode 100644
index b335b1650..000000000
--- a/searx/unixthreadname.py
+++ /dev/null
@@ -1,21 +0,0 @@
-# SPDX-License-Identifier: AGPL-3.0-or-later
-"""
-if setproctitle is installed.
-set Unix thread name with the Python thread name
-"""
-
-try:
-    import setproctitle
-except ImportError:
-    pass
-else:
-    import threading
-
-    old_thread_init = threading.Thread.__init__
-
-    def new_thread_init(self, *args, **kwargs):
-        # pylint: disable=protected-access, disable=c-extension-no-member
-        old_thread_init(self, *args, **kwargs)
-        setproctitle.setthreadtitle(self._name)
-
-    threading.Thread.__init__ = new_thread_init
diff --git a/searx/webapp.py b/searx/webapp.py
index d7bb37717..c1857dd87 100755
--- a/searx/webapp.py
+++ b/searx/webapp.py
@@ -1040,7 +1040,6 @@ def image_proxy():
         request_headers = {
             'User-Agent': gen_useragent(),
             'Accept': 'image/webp,*/*',
-            'Accept-Encoding': 'gzip, deflate',
             'Sec-GPC': '1',
             'DNT': '1',
         }