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|
# fmt: off
"""WSGI Flask-app for browsing a database.
::
+---------------------+
| layout.html |
| +-----------------+ | +--------------+
| | search.html | | | layout.html |
| | + | | | +---------+ |
| | table.html ----------->| |row.html | |
| | | | | +---------+ |
| +-----------------+ | +--------------+
+---------------------+
You can launch Flask's local webserver like this::
$ ase db abc.db -w
or this::
$ python3 -m ase.db.app abc.db
"""
import io
import sys
from pathlib import Path
from ase.db import connect
from ase.db.core import Database
from ase.db.project import DatabaseProject
from ase.db.web import Session
class DBApp:
root = Path(__file__).parent.parent.parent
def __init__(self):
self.projects = {}
flask = new_app(self.projects)
self.flask = flask
# Other projects will want to control the routing of the front
# page, for which reasons we route it here in DBApp instead of
# already in new_app().
@flask.route('/')
def frontpage():
projectname = next(iter(self.projects))
return flask.view_functions['search'](projectname)
def add_project(self, name: str, db: Database) -> None:
self.projects[name] = DatabaseProject.load_db_as_ase_project(
name=name, database=db)
@classmethod
def run_db(cls, db):
app = cls()
app.add_project('default', db)
app.flask.run(host='0.0.0.0', debug=True)
def new_app(projects):
from flask import Flask, render_template, request
app = Flask(__name__, template_folder=str(DBApp.root))
@app.route('/<project_name>')
@app.route('/<project_name>/')
def search(project_name: str):
"""Search page.
Contains input form for database query and a table result rows.
"""
if project_name == 'favicon.ico':
return '', 204, [] # 204: "No content"
session = Session(project_name)
project = projects[project_name]
return render_template(str(project.get_search_template()),
q=request.args.get('query', ''),
project=project,
session_id=session.id)
@app.route('/update/<int:sid>/<what>/<x>/')
def update(sid: int, what: str, x: str):
"""Update table of rows inside search page.
``what`` must be one of:
* query: execute query in request.args (x not used)
* limit: set number of rows to show to x
* toggle: toggle column x
* sort: sort after column x
* page: show page x
"""
session = Session.get(sid)
project = projects[session.project_name]
session.update(what, x, request.args, project)
table = session.create_table(project.database,
project.uid_key,
keys=list(project.key_descriptions))
return render_template(str(project.get_table_template()),
table=table,
project=project,
session=session)
@app.route('/<project_name>/row/<uid>')
def row(project_name: str, uid: str):
"""Show details for one database row."""
project = projects[project_name]
row = project.uid_to_row(uid)
dct = project.row_to_dict(row)
return render_template(str(project.get_row_template()),
dct=dct, row=row, project=project, uid=uid)
@app.route('/atoms/<project_name>/<int:id>/<type>')
def atoms(project_name: str, id: int, type: str):
"""Return atomic structure as cif, xyz or json."""
row = projects[project_name].database.get(id=id)
a = row.toatoms()
if type == 'cif':
b = io.BytesIO()
a.pbc = True
a.write(b, 'cif', wrap=False)
return b.getvalue(), 200, []
fd = io.StringIO()
if type == 'xyz':
a.write(fd, format='extxyz')
elif type == 'json':
con = connect(fd, type='json')
con.write(row,
data=row.get('data', {}),
**row.get('key_value_pairs', {}))
else:
1 / 0
headers = [('Content-Disposition',
'attachment; filename="{project_name}-{id}.{type}"'
.format(project_name=project_name, id=id, type=type))]
txt = fd.getvalue()
return txt, 200, headers
@app.route('/gui/<int:id>')
def gui(id: int):
"""Pop ud ase gui window."""
from ase.visualize import view
# XXX so broken
arbitrary_project = next(iter(projects))
atoms = projects[arbitrary_project].database.get_atoms(id)
view(atoms)
return '', 204, []
@app.route('/test')
def test():
return 'hello, world!'
@app.route('/robots.txt')
def robots():
return ('User-agent: *\n'
'Disallow: /\n'
'\n'
'User-agent: Baiduspider\n'
'Disallow: /\n'
'\n'
'User-agent: SiteCheck-sitecrawl by Siteimprove.com\n'
'Disallow: /\n',
200)
return app
def main():
db = connect(sys.argv[1])
DBApp.run_db(db)
if __name__ == '__main__':
main()
|
