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#! /usr/bin/env python3
import os
import sys
import json
import authn
import index
import falcon
from db import DictDB
from base64 import b64decode
from wsgiref.simple_server import make_server
try:
database = os.environ['COUCHDB_NAME']
hostname = os.environ['COUCHDB_HOSTNAME']
username = os.environ['COUCHDB_USER']
password = os.environ['COUCHDB_PASSWORD']
except KeyError:
print('The environment variables COUCHDB_NAME, COUCHDB_HOSTNAME,' +
' COUCHDB_USER and COUCHDB_PASSWORD must be set.')
sys.exit(-1)
class CollectorResource():
def __init__(self, db, users):
self._db = db
self._users = users
def parse_error(data):
return "I want valid JSON but got this:\n{}\n".format(data)
def user_auth(self, auth_header, authfun):
if not auth_header:
return None, None # Fail.
BAlit, b64 = auth_header.split()
if BAlit != "Basic":
return None, None # Fail
userbytes, pwbytes = b64decode(b64).split(b':')
try:
user = userbytes.decode('utf-8')
pw = pwbytes.decode('utf-8')
except Exception:
return None, None # Fail
return authfun(user, pw)
class EPGet(CollectorResource):
def on_get(self, req, resp, key=None):
out = list()
selectors = dict()
resp.status = falcon.HTTP_200
resp.content_type = falcon.MEDIA_JSON
orgs = self.user_auth(req.auth, self._users.read_perms)
if not orgs:
resp.status = falcon.HTTP_401
resp.text = json.dumps(
{'status': 'error', 'message': 'Invalid username or password\n'})
return
if key:
out = self._db.get(key)
resp.text = json.dumps({'status': 'success', 'data': out})
return
for param in req.params:
for i in index.indexes:
for j in i['index']['fields']:
if j == param:
selectors[param] = req.params[param]
for org in orgs:
selectors['domain'] = org
data = self._db.search(**selectors)
if data:
out += data
resp.text = json.dumps({'status': 'success', 'data': out})
class EPAdd(CollectorResource):
def on_post(self, req, resp):
resp.status = falcon.HTTP_200
resp.content_type = falcon.MEDIA_TEXT
self._indata = []
orgs = self.user_auth(req.auth, self._users.write_perms)
if not orgs:
resp.status = falcon.HTTP_401
resp.text = json.dumps(
{'status': 'error', 'message': 'Invalid user or password\n'})
return
# NOTE: Allowing writing to _any_ org!
# TODO: Allow only input where input.domain in orgs == True.
# TODO: can we do json.load(req.bounded_stream,
# cls=customDecoder) where our decoder calls JSONDecoder after
# decoding UTF-8?
# NOTE: Reading the whole body in one go instead of streaming
# it nicely.
rawin = req.bounded_stream.read()
try:
decodedin = rawin.decode('UTF-8')
except Exception:
resp.status = falcon.HTTP_400
resp.text = json.dumps(
{'status': 'error', 'message': 'Need UTF-8\n'})
return
try:
json_data = json.loads(decodedin)
except TypeError:
print('DEBUG: type error')
resp.status = falcon.HTTP_400
resp.text = json.dumps(
{'status': 'error', 'message': CollectorResource.parse_error(decodedin)})
return
except json.decoder.JSONDecodeError:
print('DEBUG: json decode error')
resp.status = falcon.HTTP_400
resp.text = json.dumps(
{'status': 'error', 'message': CollectorResource.parse_error(decodedin)})
return
keys = self._db.add(json_data)
resp.text = json.dumps({'status': 'success', 'key': keys})
def main(port=8000, wsgi_helper=False):
db = DictDB(database, hostname, username, password)
users = authn.UserDB('wsgi_demo_users.yaml')
resources_map = [
('/sc/v0/add', EPAdd(db, users)),
('/sc/v0/get', EPGet(db, users)),
('/sc/v0/get/{key}', EPGet(db, users))
]
app = falcon.App(cors_enable=True)
for url, res in resources_map:
app.add_route(url, res)
if not wsgi_helper:
print('Serving on port 8000...')
httpd = make_server('', port, app)
httpd.serve_forever()
return app
if __name__ == '__main__':
sys.exit(main())
else:
app = main(port=8000, wsgi_helper=True)
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