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[fix] issues when launching a local development server

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A local development server can be launched by one of these command lines::

    $ flask --app searx.webapp run
    $ python -m searx.webapp

The different ways of starting the server should lead to the same result, which
is generally the case.  However, if the modules are reloaded after code
changes (reload option), it must be avoided that the application is initialized
twice at startup.  We have already discussed this in 2022 [1][2].

Further information on this topic can be found in [3][4][5].

To test a bash in the ./local environment was started and the follwing commands
had been executed::

    $ ./manage pyenv.cmd bash --norc --noprofile
    (py3) SEARXNG_DEBUG=1 flask --app searx.webapp run --reload
    (py3) SEARXNG_DEBUG=1 python -m searx.webapp

Since the generic parts of the docs also initialize the app to generate doc from
it, the build of the docs was also tested::

    $ make docs.clean docs.live

[1] https://github.com/searxng/searxng/pull/1656#issuecomment-1214198941
[2] https://github.com/searxng/searxng/pull/1616#issuecomment-1206137468
[3] https://flask.palletsprojects.com/en/stable/api/#flask.Flask.run
[4] https://github.com/pallets/flask/issues/5307#issuecomment-1774646119
[5] https://stackoverflow.com/a/25504196

Signed-off-by: Markus Heiser <markus.heiser@darmarit.de>
This commit is contained in:
Markus Heiser 2025-04-09 14:01:01 +02:00 • committed by Markus Heiser
parent 5ae3b3f17e
commit e9157b3c1a
8 changed files with 112 additions and 76 deletions
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16
searx/webutils.py
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@ -9,7 +9,6 @@ import csv
import hashlib
import hmac
import re
import inspect
import itertools
import json
from datetime import datetime, timedelta
@ -316,21 +315,6 @@ def searxng_l10n_timespan(dt: datetime) -> str: # pylint: disable=invalid-name
return format_date(dt)
def is_flask_run_cmdline():
"""Check if the application was started using "flask run" command line
Inspect the callstack.
See https://github.com/pallets/flask/blob/master/src/flask/__main__.py
Returns:
bool: True if the application was started using "flask run".
"""
frames = inspect.stack()
if len(frames) < 2:
return False
return frames[-2].filename.endswith('flask/cli.py')
NO_SUBGROUPING = 'without further subgrouping'