We are currently solving the following issue within our repository. Here is the issue text:
--- BEGIN ISSUE ---
Make secret_key default one that will fail if not set to a custom value
Currently, the `secret_key` default value is `ultrasecretkey` which is a valid value. Would it not be better to let the default value of this setting be one that will make searx fail to start? This will force the user to conciously change this setting to a secure value instead of accidentally forgetting to set this to something random and secure.

--- END ISSUE ---

Below are some code segments, each from a relevant file. One or more of these files may contain bugs.
--- BEGIN FILES ---
Path: `searx/__init__.py`
Content:
```
1 '''
2 searx is free software: you can redistribute it and/or modify
3 it under the terms of the GNU Affero General Public License as published by
4 the Free Software Foundation, either version 3 of the License, or
5 (at your option) any later version.
6 
7 searx is distributed in the hope that it will be useful,
8 but WITHOUT ANY WARRANTY; without even the implied warranty of
9 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
10 GNU Affero General Public License for more details.
11 
12 You should have received a copy of the GNU Affero General Public License
13 along with searx. If not, see < http://www.gnu.org/licenses/ >.
14 
15 (C) 2013- by Adam Tauber, <asciimoo@gmail.com>
16 '''
17 
18 import logging
19 from os import environ
20 from os.path import realpath, dirname, join, abspath, isfile
21 from io import open
22 from yaml import safe_load
23 
24 
25 searx_dir = abspath(dirname(__file__))
26 engine_dir = dirname(realpath(__file__))
27 static_path = abspath(join(dirname(__file__), 'static'))
28 
29 
30 def check_settings_yml(file_name):
31     if isfile(file_name):
32         return file_name
33     else:
34         return None
35 
36 
37 # find location of settings.yml
38 if 'SEARX_SETTINGS_PATH' in environ:
39     # if possible set path to settings using the
40     # enviroment variable SEARX_SETTINGS_PATH
41     settings_path = check_settings_yml(environ['SEARX_SETTINGS_PATH'])
42 else:
43     # if not, get it from searx code base or last solution from /etc/searx
44     settings_path = check_settings_yml(join(searx_dir, 'settings.yml')) or check_settings_yml('/etc/searx/settings.yml')
45 
46 if not settings_path:
47     raise Exception('settings.yml not found')
48 
49 # load settings
50 with open(settings_path, 'r', encoding='utf-8') as settings_yaml:
51     settings = safe_load(settings_yaml)
52 
53 if settings['ui']['static_path']:
54     static_path = settings['ui']['static_path']
55 
56 '''
57 enable debug if
58 the environnement variable SEARX_DEBUG is 1 or true
59 (whatever the value in settings.yml)
60 or general.debug=True in settings.yml
61 
62 disable debug if
63 the environnement variable SEARX_DEBUG is 0 or false
64 (whatever the value in settings.yml)
65 or general.debug=False in settings.yml
66 '''
67 searx_debug_env = environ.get('SEARX_DEBUG', '').lower()
68 if searx_debug_env == 'true' or searx_debug_env == '1':
69     searx_debug = True
70 elif searx_debug_env == 'false' or searx_debug_env == '0':
71     searx_debug = False
72 else:
73     searx_debug = settings.get('general', {}).get('debug')
74 
75 if searx_debug:
76     logging.basicConfig(level=logging.DEBUG)
77 else:
78     logging.basicConfig(level=logging.WARNING)
79 
80 logger = logging.getLogger('searx')
81 logger.debug('read configuration from %s', settings_path)
82 logger.info('Initialisation done')
83 
84 if 'SEARX_SECRET' in environ:
85     settings['server']['secret_key'] = environ['SEARX_SECRET']
86 if 'SEARX_BIND_ADDRESS' in environ:
87     settings['server']['bind_address'] = environ['SEARX_BIND_ADDRESS']
88
```
--- END FILES ---

Please first localize the bug based on the issue statement, and then generate a patch according to the `git diff` format fenced by three backticks.

Here is an example:

```diff
diff --git a/examples/server_async.py b/examples/server_async.py
--- a/examples/server_async.py
+++ b/examples/server_async.py
@@ -313,4 +313,4 @@
 
 
 if __name__ == "__main__":
-    asyncio.run(run_async_server("."), debug=True)
+    asyncio.run(run_async_server(), debug=True)
diff --git a/examples/server_sync.py b/examples/server_sync.py
--- a/examples/server_sync.py
+++ b/examples/server_sync.py
@@ -313,5 +313,5 @@
 
 
 if __name__ == "__main__":
-    server = run_sync_server(".")
+    server = run_sync_server()
     server.shutdown()

```

diff --git a/searx/__init__.py b/searx/__init__.py
--- a/searx/__init__.py
+++ b/searx/__init__.py
@@ -85,3 +85,7 @@
     settings['server']['secret_key'] = environ['SEARX_SECRET']
 if 'SEARX_BIND_ADDRESS' in environ:
     settings['server']['bind_address'] = environ['SEARX_BIND_ADDRESS']
+
+if not searx_debug and settings['server']['secret_key'] == 'ultrasecretkey':
+    logger.error('server.secret_key is not changed. Please use something else instead of ultrasecretkey.')
+    exit(1)

{"golden_diff": "diff --git a/searx/__init__.py b/searx/__init__.py\n--- a/searx/__init__.py\n+++ b/searx/__init__.py\n@@ -85,3 +85,7 @@\n     settings['server']['secret_key'] = environ['SEARX_SECRET']\n if 'SEARX_BIND_ADDRESS' in environ:\n     settings['server']['bind_address'] = environ['SEARX_BIND_ADDRESS']\n+\n+if not searx_debug and settings['server']['secret_key'] == 'ultrasecretkey':\n+    logger.error('server.secret_key is not changed. Please use something else instead of ultrasecretkey.')\n+    exit(1)\n", "issue": "Make secret_key default one that will fail if not set to a custom value\nCurrently, the `secret_key` default value is `ultrasecretkey` which is a valid value. Would it not be better to let the default value of this setting be one that will make searx fail to start? This will force the user to conciously change this setting to a secure value instead of accidentally forgetting to set this to something random and secure.\n", "before_files": [{"content": "'''\nsearx is free software: you can redistribute it and/or modify\nit under the terms of the GNU Affero General Public License as published by\nthe Free Software Foundation, either version 3 of the License, or\n(at your option) any later version.\n\nsearx is distributed in the hope that it will be useful,\nbut WITHOUT ANY WARRANTY; without even the implied warranty of\nMERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the\nGNU Affero General Public License for more details.\n\nYou should have received a copy of the GNU Affero General Public License\nalong with searx. If not, see < http://www.gnu.org/licenses/ >.\n\n(C) 2013- by Adam Tauber, <asciimoo@gmail.com>\n'''\n\nimport logging\nfrom os import environ\nfrom os.path import realpath, dirname, join, abspath, isfile\nfrom io import open\nfrom yaml import safe_load\n\n\nsearx_dir = abspath(dirname(__file__))\nengine_dir = dirname(realpath(__file__))\nstatic_path = abspath(join(dirname(__file__), 'static'))\n\n\ndef check_settings_yml(file_name):\n    if isfile(file_name):\n        return file_name\n    else:\n        return None\n\n\n# find location of settings.yml\nif 'SEARX_SETTINGS_PATH' in environ:\n    # if possible set path to settings using the\n    # enviroment variable SEARX_SETTINGS_PATH\n    settings_path = check_settings_yml(environ['SEARX_SETTINGS_PATH'])\nelse:\n    # if not, get it from searx code base or last solution from /etc/searx\n    settings_path = check_settings_yml(join(searx_dir, 'settings.yml')) or check_settings_yml('/etc/searx/settings.yml')\n\nif not settings_path:\n    raise Exception('settings.yml not found')\n\n# load settings\nwith open(settings_path, 'r', encoding='utf-8') as settings_yaml:\n    settings = safe_load(settings_yaml)\n\nif settings['ui']['static_path']:\n    static_path = settings['ui']['static_path']\n\n'''\nenable debug if\nthe environnement variable SEARX_DEBUG is 1 or true\n(whatever the value in settings.yml)\nor general.debug=True in settings.yml\n\ndisable debug if\nthe environnement variable SEARX_DEBUG is 0 or false\n(whatever the value in settings.yml)\nor general.debug=False in settings.yml\n'''\nsearx_debug_env = environ.get('SEARX_DEBUG', '').lower()\nif searx_debug_env == 'true' or searx_debug_env == '1':\n    searx_debug = True\nelif searx_debug_env == 'false' or searx_debug_env == '0':\n    searx_debug = False\nelse:\n    searx_debug = settings.get('general', {}).get('debug')\n\nif searx_debug:\n    logging.basicConfig(level=logging.DEBUG)\nelse:\n    logging.basicConfig(level=logging.WARNING)\n\nlogger = logging.getLogger('searx')\nlogger.debug('read configuration from %s', settings_path)\nlogger.info('Initialisation done')\n\nif 'SEARX_SECRET' in environ:\n    settings['server']['secret_key'] = environ['SEARX_SECRET']\nif 'SEARX_BIND_ADDRESS' in environ:\n    settings['server']['bind_address'] = environ['SEARX_BIND_ADDRESS']\n", "path": "searx/__init__.py"}], "after_files": [{"content": "'''\nsearx is free software: you can redistribute it and/or modify\nit under the terms of the GNU Affero General Public License as published by\nthe Free Software Foundation, either version 3 of the License, or\n(at your option) any later version.\n\nsearx is distributed in the hope that it will be useful,\nbut WITHOUT ANY WARRANTY; without even the implied warranty of\nMERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the\nGNU Affero General Public License for more details.\n\nYou should have received a copy of the GNU Affero General Public License\nalong with searx. If not, see < http://www.gnu.org/licenses/ >.\n\n(C) 2013- by Adam Tauber, <asciimoo@gmail.com>\n'''\n\nimport logging\nfrom os import environ\nfrom os.path import realpath, dirname, join, abspath, isfile\nfrom io import open\nfrom yaml import safe_load\n\n\nsearx_dir = abspath(dirname(__file__))\nengine_dir = dirname(realpath(__file__))\nstatic_path = abspath(join(dirname(__file__), 'static'))\n\n\ndef check_settings_yml(file_name):\n    if isfile(file_name):\n        return file_name\n    else:\n        return None\n\n\n# find location of settings.yml\nif 'SEARX_SETTINGS_PATH' in environ:\n    # if possible set path to settings using the\n    # enviroment variable SEARX_SETTINGS_PATH\n    settings_path = check_settings_yml(environ['SEARX_SETTINGS_PATH'])\nelse:\n    # if not, get it from searx code base or last solution from /etc/searx\n    settings_path = check_settings_yml(join(searx_dir, 'settings.yml')) or check_settings_yml('/etc/searx/settings.yml')\n\nif not settings_path:\n    raise Exception('settings.yml not found')\n\n# load settings\nwith open(settings_path, 'r', encoding='utf-8') as settings_yaml:\n    settings = safe_load(settings_yaml)\n\nif settings['ui']['static_path']:\n    static_path = settings['ui']['static_path']\n\n'''\nenable debug if\nthe environnement variable SEARX_DEBUG is 1 or true\n(whatever the value in settings.yml)\nor general.debug=True in settings.yml\n\ndisable debug if\nthe environnement variable SEARX_DEBUG is 0 or false\n(whatever the value in settings.yml)\nor general.debug=False in settings.yml\n'''\nsearx_debug_env = environ.get('SEARX_DEBUG', '').lower()\nif searx_debug_env == 'true' or searx_debug_env == '1':\n    searx_debug = True\nelif searx_debug_env == 'false' or searx_debug_env == '0':\n    searx_debug = False\nelse:\n    searx_debug = settings.get('general', {}).get('debug')\n\nif searx_debug:\n    logging.basicConfig(level=logging.DEBUG)\nelse:\n    logging.basicConfig(level=logging.WARNING)\n\nlogger = logging.getLogger('searx')\nlogger.debug('read configuration from %s', settings_path)\nlogger.info('Initialisation done')\n\nif 'SEARX_SECRET' in environ:\n    settings['server']['secret_key'] = environ['SEARX_SECRET']\nif 'SEARX_BIND_ADDRESS' in environ:\n    settings['server']['bind_address'] = environ['SEARX_BIND_ADDRESS']\n\nif not searx_debug and settings['server']['secret_key'] == 'ultrasecretkey':\n    logger.error('server.secret_key is not changed. Please use something else instead of ultrasecretkey.')\n    exit(1)\n", "path": "searx/__init__.py"}]}