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sqlite_web.py
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executable file
·848 lines (728 loc) · 26.2 KB
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#!/usr/bin/env python
import datetime
import math
import operator
import optparse
import os
import re
import sys
import threading
import time
import webbrowser
from collections import namedtuple, OrderedDict
from functools import wraps
from getpass import getpass
from io import TextIOWrapper
# Py2k compat.
if sys.version_info[0] == 2:
PY2 = True
binary_types = (buffer, bytes, bytearray)
decode_handler = 'replace'
numeric = (int, long, float)
unicode_type = unicode
from StringIO import StringIO
else:
PY2 = False
binary_types = (bytes, bytearray)
decode_handler = 'backslashreplace'
numeric = (int, float)
unicode_type = str
from io import StringIO
try:
from flask import (
Flask, abort, escape, flash, jsonify, make_response, Markup, redirect,
render_template, request, session, url_for)
except ImportError:
raise RuntimeError('Unable to import flask module. Install by running '
'pip install flask')
try:
from pygments import formatters, highlight, lexers
except ImportError:
import warnings
warnings.warn('pygments library not found.', ImportWarning)
syntax_highlight = lambda data: '<pre>%s</pre>' % data
else:
def syntax_highlight(data):
if not data:
return ''
lexer = lexers.get_lexer_by_name('sql')
formatter = formatters.HtmlFormatter(linenos=False)
return highlight(data, lexer, formatter)
try:
from peewee import __version__
peewee_version = tuple([int(p) for p in __version__.split('.')])
except ImportError:
raise RuntimeError('Unable to import peewee module. Install by running '
'pip install peewee')
else:
if peewee_version <= (3, 0, 0):
raise RuntimeError('Peewee >= 3.0.0 is required. Found version %s. '
'Please update by running pip install --update '
'peewee' % __version__)
from peewee import *
from peewee import IndexMetadata
from peewee import sqlite3
from playhouse.dataset import DataSet
from playhouse.migrate import migrate
CUR_DIR = os.path.realpath(os.path.dirname(__file__))
DEBUG = False
MAX_RESULT_SIZE = 1000
ROWS_PER_PAGE = 50
SECRET_KEY = 'sqlite-database-browser-0.1.0'
app = Flask(
__name__,
static_folder=os.path.join(CUR_DIR, 'static'),
template_folder=os.path.join(CUR_DIR, 'templates'))
app.config.from_object(__name__)
dataset = None
migrator = None
#
# Database metadata objects.
#
TriggerMetadata = namedtuple('TriggerMetadata', ('name', 'sql'))
ViewMetadata = namedtuple('ViewMetadata', ('name', 'sql'))
#
# Database helpers.
#
class SqliteDataSet(DataSet):
@property
def filename(self):
db_file = dataset._database.database
if db_file.startswith('file:'):
db_file = db_file[5:]
return os.path.realpath(db_file.rsplit('?', 1)[0])
@property
def is_readonly(self):
db_file = dataset._database.database
return db_file.endswith('?mode=ro')
@property
def base_name(self):
return os.path.basename(self.filename)
@property
def created(self):
stat = os.stat(self.filename)
return datetime.datetime.fromtimestamp(stat.st_ctime)
@property
def modified(self):
stat = os.stat(self.filename)
return datetime.datetime.fromtimestamp(stat.st_mtime)
@property
def size_on_disk(self):
stat = os.stat(self.filename)
return stat.st_size
def get_indexes(self, table):
return dataset._database.get_indexes(table)
def get_all_indexes(self):
cursor = self.query(
'SELECT name, sql FROM sqlite_master '
'WHERE type = ? ORDER BY name',
('index',))
return [IndexMetadata(row[0], row[1], None, None, None)
for row in cursor.fetchall()]
def get_columns(self, table):
return dataset._database.get_columns(table)
def get_foreign_keys(self, table):
return dataset._database.get_foreign_keys(table)
def get_triggers(self, table):
cursor = self.query(
'SELECT name, sql FROM sqlite_master '
'WHERE type = ? AND tbl_name = ?',
('trigger', table))
return [TriggerMetadata(*row) for row in cursor.fetchall()]
def get_all_triggers(self):
cursor = self.query(
'SELECT name, sql FROM sqlite_master '
'WHERE type = ? ORDER BY name',
('trigger',))
return [TriggerMetadata(*row) for row in cursor.fetchall()]
def get_all_views(self):
cursor = self.query(
'SELECT name, sql FROM sqlite_master '
'WHERE type = ? ORDER BY name',
('view',))
return [ViewMetadata(*row) for row in cursor.fetchall()]
def get_virtual_tables(self):
cursor = self.query(
'SELECT name FROM sqlite_master '
'WHERE type = ? AND sql LIKE ? '
'ORDER BY name',
('table', 'CREATE VIRTUAL TABLE%'))
return set([row[0] for row in cursor.fetchall()])
def get_corollary_virtual_tables(self):
virtual_tables = self.get_virtual_tables()
suffixes = ['content', 'docsize', 'segdir', 'segments', 'stat']
return set(
'%s_%s' % (virtual_table, suffix) for suffix in suffixes
for virtual_table in virtual_tables)
#
# Flask views.
#
@app.route('/')
def index():
return render_template('index.html', sqlite=sqlite3)
@app.route('/login/', methods=['GET', 'POST'])
def login():
if request.method == 'POST':
if request.form.get('password') == app.config['PASSWORD']:
session['authorized'] = True
return redirect(session.get('next_url') or url_for('index'))
flash('The password you entered is incorrect.', 'danger')
return render_template('login.html')
@app.route('/logout/', methods=['GET'])
def logout():
session.pop('authorized', None)
return redirect(url_for('login'))
def require_table(fn):
@wraps(fn)
def inner(table, *args, **kwargs):
if table not in dataset.tables:
abort(404)
return fn(table, *args, **kwargs)
return inner
@app.route('/create-table/', methods=['POST'])
def table_create():
table = (request.form.get('table_name') or '').strip()
if not table:
flash('Table name is required.', 'danger')
return redirect(request.form.get('redirect') or url_for('index'))
dataset[table]
return redirect(url_for('table_import', table=table))
@app.route('/<table>/')
@require_table
def table_structure(table):
ds_table = dataset[table]
model_class = ds_table.model_class
table_sql = dataset.query(
'SELECT sql FROM sqlite_master WHERE tbl_name = ? AND type = ?',
[table, 'table']).fetchone()[0]
return render_template(
'table_structure.html',
columns=dataset.get_columns(table),
ds_table=ds_table,
foreign_keys=dataset.get_foreign_keys(table),
indexes=dataset.get_indexes(table),
model_class=model_class,
table=table,
table_sql=table_sql,
triggers=dataset.get_triggers(table))
def get_request_data():
if request.method == 'POST':
return request.form
return request.args
@app.route('/<table>/add-column/', methods=['GET', 'POST'])
@require_table
def add_column(table):
column_mapping = OrderedDict((
('VARCHAR', CharField),
('TEXT', TextField),
('INTEGER', IntegerField),
('REAL', FloatField),
('BOOL', BooleanField),
('BLOB', BlobField),
('DATETIME', DateTimeField),
('DATE', DateField),
('TIME', TimeField),
('DECIMAL', DecimalField)))
request_data = get_request_data()
col_type = request_data.get('type')
name = request_data.get('name', '')
if request.method == 'POST':
if name and col_type in column_mapping:
migrate(
migrator.add_column(
table,
name,
column_mapping[col_type](null=True)))
flash('Column "%s" was added successfully!' % name, 'success')
dataset.update_cache(table)
return redirect(url_for('table_structure', table=table))
else:
flash('Name and column type are required.', 'danger')
return render_template(
'add_column.html',
col_type=col_type,
column_mapping=column_mapping,
name=name,
table=table)
@app.route('/<table>/drop-column/', methods=['GET', 'POST'])
@require_table
def drop_column(table):
request_data = get_request_data()
name = request_data.get('name', '')
columns = dataset.get_columns(table)
column_names = [column.name for column in columns]
if request.method == 'POST':
if name in column_names:
migrate(migrator.drop_column(table, name))
flash('Column "%s" was dropped successfully!' % name, 'success')
dataset.update_cache(table)
return redirect(url_for('table_structure', table=table))
else:
flash('Name is required.', 'danger')
return render_template(
'drop_column.html',
columns=columns,
column_names=column_names,
name=name,
table=table)
@app.route('/<table>/rename-column/', methods=['GET', 'POST'])
@require_table
def rename_column(table):
request_data = get_request_data()
rename = request_data.get('rename', '')
rename_to = request_data.get('rename_to', '')
columns = dataset.get_columns(table)
column_names = [column.name for column in columns]
if request.method == 'POST':
if (rename in column_names) and (rename_to not in column_names):
migrate(migrator.rename_column(table, rename, rename_to))
flash('Column "%s" was renamed successfully!' % rename, 'success')
dataset.update_cache(table)
return redirect(url_for('table_structure', table=table))
else:
flash('Column name is required and cannot conflict with an '
'existing column\'s name.', 'danger')
return render_template(
'rename_column.html',
columns=columns,
column_names=column_names,
rename=rename,
rename_to=rename_to,
table=table)
@app.route('/<table>/add-index/', methods=['GET', 'POST'])
@require_table
def add_index(table):
request_data = get_request_data()
indexed_columns = request_data.getlist('indexed_columns')
unique = bool(request_data.get('unique'))
columns = dataset.get_columns(table)
if request.method == 'POST':
if indexed_columns:
migrate(
migrator.add_index(
table,
indexed_columns,
unique))
flash('Index created successfully.', 'success')
return redirect(url_for('table_structure', table=table))
else:
flash('One or more columns must be selected.', 'danger')
return render_template(
'add_index.html',
columns=columns,
indexed_columns=indexed_columns,
table=table,
unique=unique)
@app.route('/<table>/drop-index/', methods=['GET', 'POST'])
@require_table
def drop_index(table):
request_data = get_request_data()
name = request_data.get('name', '')
indexes = dataset.get_indexes(table)
index_names = [index.name for index in indexes]
if request.method == 'POST':
if name in index_names:
migrate(migrator.drop_index(table, name))
flash('Index "%s" was dropped successfully!' % name, 'success')
return redirect(url_for('table_structure', table=table))
else:
flash('Index name is required.', 'danger')
return render_template(
'drop_index.html',
indexes=indexes,
index_names=index_names,
name=name,
table=table)
@app.route('/<table>/drop-trigger/', methods=['GET', 'POST'])
@require_table
def drop_trigger(table):
request_data = get_request_data()
name = request_data.get('name', '')
triggers = dataset.get_triggers(table)
trigger_names = [trigger.name for trigger in triggers]
if request.method == 'POST':
if name in trigger_names:
dataset.query('DROP TRIGGER "%s";' % name)
flash('Trigger "%s" was dropped successfully!' % name, 'success')
return redirect(url_for('table_structure', table=table))
else:
flash('Trigger name is required.', 'danger')
return render_template(
'drop_trigger.html',
triggers=triggers,
trigger_names=trigger_names,
name=name,
table=table)
@app.route('/<table>/content/')
@require_table
def table_content(table):
page_number = request.args.get('page') or ''
page_number = int(page_number) if page_number.isdigit() else 1
dataset.update_cache(table)
ds_table = dataset[table]
total_rows = ds_table.all().count()
rows_per_page = app.config['ROWS_PER_PAGE']
total_pages = int(math.ceil(total_rows / float(rows_per_page)))
# Restrict bounds.
page_number = min(page_number, total_pages)
page_number = max(page_number, 1)
previous_page = page_number - 1 if page_number > 1 else None
next_page = page_number + 1 if page_number < total_pages else None
query = ds_table.all().paginate(page_number, rows_per_page)
ordering = request.args.get('ordering')
if ordering:
field = ds_table.model_class._meta.columns[ordering.lstrip('-')]
if ordering.startswith('-'):
field = field.desc()
query = query.order_by(field)
field_names = ds_table.columns
columns = [f.column_name for f in ds_table.model_class._meta.sorted_fields]
table_sql = dataset.query(
'SELECT sql FROM sqlite_master WHERE tbl_name = ? AND type = ?',
[table, 'table']).fetchone()[0]
return render_template(
'table_content.html',
columns=columns,
ds_table=ds_table,
field_names=field_names,
next_page=next_page,
ordering=ordering,
page=page_number,
previous_page=previous_page,
query=query,
table=table,
total_pages=total_pages,
total_rows=total_rows)
@app.route('/<table>/query/', methods=['GET', 'POST'])
@require_table
def table_query(table):
data = []
data_description = error = row_count = sql = None
if request.method == 'POST':
sql = request.form['sql']
if 'export_json' in request.form:
return export(table, sql, 'json')
elif 'export_csv' in request.form:
return export(table, sql, 'csv')
try:
cursor = dataset.query(sql)
except Exception as exc:
error = str(exc)
else:
data = cursor.fetchall()[:app.config['MAX_RESULT_SIZE']]
data_description = cursor.description
row_count = cursor.rowcount
else:
if request.args.get('sql'):
sql = request.args.get('sql')
else:
sql = 'SELECT *\nFROM "%s"' % (table)
table_sql = dataset.query(
'SELECT sql FROM sqlite_master WHERE tbl_name = ? AND type = ?',
[table, 'table']).fetchone()[0]
return render_template(
'table_query.html',
data=data,
data_description=data_description,
error=error,
query_images=get_query_images(),
row_count=row_count,
sql=sql,
table=table,
table_sql=table_sql)
@app.route('/table-definition/', methods=['POST'])
def set_table_definition_preference():
key = 'show'
show = False
if request.form.get(key) and request.form.get(key) != 'false':
session[key] = show = True
elif key in session:
del session[key]
return jsonify({key: show})
def export(table, sql, export_format):
model_class = dataset[table].model_class
query = model_class.raw(sql).dicts()
buf = StringIO()
if export_format == 'json':
kwargs = {'indent': 2}
filename = '%s-export.json' % table
mimetype = 'text/javascript'
else:
kwargs = {}
filename = '%s-export.csv' % table
mimetype = 'text/csv'
dataset.freeze(query, export_format, file_obj=buf, **kwargs)
response_data = buf.getvalue()
response = make_response(response_data)
response.headers['Content-Length'] = len(response_data)
response.headers['Content-Type'] = mimetype
response.headers['Content-Disposition'] = 'attachment; filename=%s' % (
filename)
response.headers['Expires'] = 0
response.headers['Pragma'] = 'public'
return response
@app.route('/<table>/import/', methods=['GET', 'POST'])
@require_table
def table_import(table):
count = None
request_data = get_request_data()
strict = bool(request_data.get('strict'))
if request.method == 'POST':
file_obj = request.files.get('file')
if not file_obj:
flash('Please select an import file.', 'danger')
elif not file_obj.filename.lower().endswith(('.csv', '.json')):
flash('Unsupported file-type. Must be a .json or .csv file.',
'danger')
else:
if file_obj.filename.lower().endswith('.json'):
format = 'json'
else:
format = 'csv'
# Here we need to translate the file stream. Werkzeug uses a
# spooled temporary file opened in wb+ mode, which is not
# compatible with Python's CSV module. We'd need to reach pretty
# far into Flask's internals to modify this behavior, so instead
# we'll just translate the stream into utf8-decoded unicode.
if not PY2:
try:
stream = TextIOWrapper(file_obj, encoding='utf8')
except AttributeError:
# The SpooledTemporaryFile used by werkzeug does not
# implement an API that the TextIOWrapper expects, so we'll
# just consume the whole damn thing and decode it.
# Fixed in werkzeug 0.15.
stream = StringIO(file_obj.read().decode('utf8'))
else:
stream = file_obj.stream
try:
with dataset.transaction():
count = dataset.thaw(
table,
format=format,
file_obj=stream,
strict=strict)
except Exception as exc:
flash('Error importing file: %s' % exc, 'danger')
else:
flash(
'Successfully imported %s objects from %s.' % (
count, file_obj.filename),
'success')
return redirect(url_for('table_content', table=table))
return render_template(
'table_import.html',
count=count,
strict=strict,
table=table)
@app.route('/<table>/drop/', methods=['GET', 'POST'])
@require_table
def drop_table(table):
if request.method == 'POST':
model_class = dataset[table].model_class
model_class.drop_table()
dataset.update_cache() # Update all tables.
flash('Table "%s" dropped successfully.' % table, 'success')
return redirect(url_for('index'))
return render_template('drop_table.html', table=table)
@app.template_filter('format_index')
def format_index(index_sql):
split_regex = re.compile(r'\bon\b', re.I)
if not split_regex.search(index_sql):
return index_sql
create, definition = split_regex.split(index_sql)
return '\nON '.join((create.strip(), definition.strip()))
@app.template_filter('value_filter')
def value_filter(value, max_length=50):
if isinstance(value, numeric):
return value
if isinstance(value, binary_types):
if not isinstance(value, (bytes, bytearray)):
value = bytes(value) # Handle `buffer` type.
value = value.decode('utf-8', decode_handler)
if isinstance(value, unicode_type):
value = escape(value)
if len(value) > max_length:
return ('<span class="truncated">%s</span> '
'<span class="full" style="display:none;">%s</span>'
'<a class="toggle-value" href="#">...</a>') % (
value[:max_length],
value)
return value
column_re = re.compile('(.+?)\((.+)\)', re.S)
column_split_re = re.compile(r'(?:[^,(]|\([^)]*\))+')
def _format_create_table(sql):
create_table, column_list = column_re.search(sql).groups()
columns = [' %s' % column.strip()
for column in column_split_re.findall(column_list)
if column.strip()]
return '%s (\n%s\n)' % (
create_table,
',\n'.join(columns))
@app.template_filter()
def format_create_table(sql):
try:
return _format_create_table(sql)
except:
return sql
@app.template_filter('highlight')
def highlight_filter(data):
return Markup(syntax_highlight(data))
def get_query_images():
accum = []
image_dir = os.path.join(app.static_folder, 'img')
if not os.path.exists(image_dir):
return accum
for filename in sorted(os.listdir(image_dir)):
basename = os.path.splitext(os.path.basename(filename))[0]
parts = basename.split('-')
accum.append((parts, 'img/' + filename))
return accum
#
# Flask application helpers.
#
@app.context_processor
def _general():
return {
'dataset': dataset,
'login_required': bool(app.config.get('PASSWORD')),
}
@app.context_processor
def _now():
return {'now': datetime.datetime.now()}
@app.before_request
def _connect_db():
dataset.connect()
@app.teardown_request
def _close_db(exc):
if not dataset._database.is_closed():
dataset.close()
class PrefixMiddleware(object):
def __init__(self, app, prefix):
self.app = app
self.prefix = '/%s' % prefix.strip('/')
self.prefix_len = len(self.prefix)
def __call__(self, environ, start_response):
if environ['PATH_INFO'].startswith(self.prefix):
environ['PATH_INFO'] = environ['PATH_INFO'][self.prefix_len:]
environ['SCRIPT_NAME'] = self.prefix
return self.app(environ, start_response)
else:
start_response('404', [('Content-Type', 'text/plain')])
return ['URL does not match application prefix.'.encode()]
#
# Script options.
#
def get_option_parser():
parser = optparse.OptionParser()
parser.add_option(
'-p',
'--port',
default=8080,
help='Port for web interface, default=8080',
type='int')
parser.add_option(
'-H',
'--host',
default='127.0.0.1',
help='Host for web interface, default=127.0.0.1')
parser.add_option(
'-d',
'--debug',
action='store_true',
help='Run server in debug mode')
parser.add_option(
'-x',
'--no-browser',
action='store_false',
default=True,
dest='browser',
help='Do not automatically open browser page.')
parser.add_option(
'-P',
'--password',
action='store_true',
dest='prompt_password',
help='Prompt for password to access database browser.')
parser.add_option(
'-r',
'--read-only',
action='store_true',
dest='read_only',
help='Open database in read-only mode.')
parser.add_option(
'-u',
'--url-prefix',
dest='url_prefix',
help='URL prefix for application.')
return parser
def die(msg, exit_code=1):
sys.stderr.write('%s\n' % msg)
sys.stderr.flush()
sys.exit(exit_code)
def open_browser_tab(host, port):
url = 'http://%s:%s/' % (host, port)
def _open_tab(url):
time.sleep(1.5)
webbrowser.open_new_tab(url)
thread = threading.Thread(target=_open_tab, args=(url,))
thread.daemon = True
thread.start()
def install_auth_handler(password):
app.config['PASSWORD'] = password
@app.before_request
def check_password():
if not session.get('authorized') and request.path != '/login/' and \
not request.path.startswith(('/static/', '/favicon')):
flash('You must log-in to view the database browser.', 'danger')
session['next_url'] = request.base_url
return redirect(url_for('login'))
def initialize_app(filename, read_only=False, password=None, url_prefix=None):
global dataset
global migrator
if password:
install_auth_handler(password)
if read_only:
if sys.version_info < (3, 4, 0):
die('Python 3.4.0 or newer is required for read-only access.')
if peewee_version < (3, 5, 1):
die('Peewee 3.5.1 or newer is required for read-only access.')
db = SqliteDatabase('file:%s?mode=ro' % filename, uri=True)
try:
db.connect()
except OperationalError:
die('Unable to open database file in read-only mode. Ensure that '
'the database exists in order to use read-only mode.')
db.close()
dataset = SqliteDataSet(db, bare_fields=True)
else:
dataset = SqliteDataSet('sqlite:///%s' % filename, bare_fields=True)
if url_prefix:
app.wsgi_app = PrefixMiddleware(app.wsgi_app, prefix=url_prefix)
migrator = dataset._migrator
dataset.close()
def main():
# This function exists to act as a console script entry-point.
parser = get_option_parser()
options, args = parser.parse_args()
if not args:
die('Error: missing required path to database file.')
password = None
if options.prompt_password:
if os.environ.get('SQLITE_WEB_PASSWORD'):
password = os.environ['SQLITE_WEB_PASSWORD']
else:
while True:
password = getpass('Enter password: ')
password_confirm = getpass('Confirm password: ')
if password != password_confirm:
print('Passwords did not match!')
else:
break
# Initialize the dataset instance and (optionally) authentication handler.
initialize_app(args[0], options.read_only, password, options.url_prefix)
if options.browser:
open_browser_tab(options.host, options.port)
app.run(host=options.host, port=options.port, debug=options.debug)
if __name__ == '__main__':
main()