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bazarr/libs/flask_debugtoolbar/panels/sqlalchemy.py

151 lines
4.0 KiB

5 years ago
try:
from flask_sqlalchemy import get_debug_queries, SQLAlchemy
except ImportError:
sqlalchemy_available = False
get_debug_queries = SQLAlchemy = None
else:
sqlalchemy_available = True
from flask import request, current_app, abort, json_available, g
from flask_debugtoolbar import module
from flask_debugtoolbar.panels import DebugPanel
from flask_debugtoolbar.utils import format_fname, format_sql
import itsdangerous
_ = lambda x: x
def query_signer():
return itsdangerous.URLSafeSerializer(current_app.config['SECRET_KEY'],
salt='fdt-sql-query')
def is_select(statement):
prefix = b'select' if isinstance(statement, bytes) else 'select'
return statement.lower().strip().startswith(prefix)
def dump_query(statement, params):
if not params or not is_select(statement):
return None
try:
return query_signer().dumps([statement, params])
except TypeError:
return None
def load_query(data):
try:
statement, params = query_signer().loads(request.args['query'])
except (itsdangerous.BadSignature, TypeError):
abort(406)
# Make sure it is a select statement
if not is_select(statement):
abort(406)
return statement, params
def extension_used():
return 'sqlalchemy' in current_app.extensions
def recording_enabled():
return (current_app.debug
or current_app.config.get('SQLALCHEMY_RECORD_QUERIES'))
def is_available():
return (json_available and sqlalchemy_available
and extension_used() and recording_enabled())
def get_queries():
if get_debug_queries:
return get_debug_queries()
else:
return []
class SQLAlchemyDebugPanel(DebugPanel):
"""
Panel that displays the time a response took in milliseconds.
"""
name = 'SQLAlchemy'
@property
def has_content(self):
return bool(get_queries()) or not is_available()
def process_request(self, request):
pass
def process_response(self, request, response):
pass
def nav_title(self):
return _('SQLAlchemy')
def nav_subtitle(self):
count = len(get_queries())
if not count and not is_available():
return 'Unavailable'
return '%d %s' % (count, 'query' if count == 1 else 'queries')
def title(self):
return _('SQLAlchemy queries')
def url(self):
return ''
def content(self):
queries = get_queries()
if not queries and not is_available():
return self.render('panels/sqlalchemy_error.html', {
'json_available': json_available,
'sqlalchemy_available': sqlalchemy_available,
'extension_used': extension_used(),
'recording_enabled': recording_enabled(),
})
data = []
for query in queries:
data.append({
'duration': query.duration,
'sql': format_sql(query.statement, query.parameters),
'signed_query': dump_query(query.statement, query.parameters),
'context_long': query.context,
'context': format_fname(query.context)
})
return self.render('panels/sqlalchemy.html', {'queries': data})
# Panel views
@module.route('/sqlalchemy/sql_select', methods=['GET', 'POST'])
@module.route('/sqlalchemy/sql_explain', methods=['GET', 'POST'],
defaults=dict(explain=True))
def sql_select(explain=False):
statement, params = load_query(request.args['query'])
engine = SQLAlchemy().get_engine(current_app)
if explain:
if engine.driver == 'pysqlite':
statement = 'EXPLAIN QUERY PLAN\n%s' % statement
else:
statement = 'EXPLAIN\n%s' % statement
result = engine.execute(statement, params)
return g.debug_toolbar.render('panels/sqlalchemy_select.html', {
'result': result.fetchall(),
'headers': result.keys(),
'sql': format_sql(statement, params),
'duration': float(request.args['duration']),
})