mirror of
https://github.com/google/blockly.git
synced 2026-01-04 23:50:12 +01:00
826510f242
Glockenspiel broke due to 'query' now being required within a client context. This change fixed Glockenspiel. Blockly samples doesn't appear to be broken yet, but Glokenspeil broke at midnight yesterday. Similar change being made to Blockly Games.
100 lines
2.8 KiB
Python
100 lines
2.8 KiB
Python
"""Blockly Demo: Storage
|
|
|
|
Copyright 2012 Google LLC
|
|
|
|
Licensed under the Apache License, Version 2.0 (the "License");
|
|
you may not use this file except in compliance with the License.
|
|
You may obtain a copy of the License at
|
|
|
|
http://www.apache.org/licenses/LICENSE-2.0
|
|
|
|
Unless required by applicable law or agreed to in writing, software
|
|
distributed under the License is distributed on an "AS IS" BASIS,
|
|
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
See the License for the specific language governing permissions and
|
|
limitations under the License.
|
|
"""
|
|
|
|
"""Store and retrieve XML with App Engine.
|
|
"""
|
|
|
|
__author__ = "q.neutron@gmail.com (Quynh Neutron)"
|
|
|
|
import cgi
|
|
import hashlib
|
|
from random import randint
|
|
from google.cloud import ndb
|
|
|
|
|
|
class Xml(ndb.Model):
|
|
# A row in the database.
|
|
xml_hash = ndb.IntegerProperty()
|
|
xml_content = ndb.TextProperty()
|
|
last_accessed = ndb.DateTimeProperty(auto_now=True)
|
|
|
|
def keyGen():
|
|
# Generate a random string of length KEY_LEN.
|
|
KEY_LEN = 6
|
|
CHARS = "abcdefghijkmnopqrstuvwxyz23456789" # Exclude l, 0, 1.
|
|
max_index = len(CHARS) - 1
|
|
return "".join([CHARS[randint(0, max_index)] for x in range(KEY_LEN)])
|
|
|
|
|
|
def xmlToKey(xml_content):
|
|
# Store XML and return a generated key.
|
|
xml_hash = int(hashlib.sha1(xml_content.encode("utf-8")).hexdigest(), 16)
|
|
xml_hash = int(xml_hash % (2 ** 64) - (2 ** 63))
|
|
client = ndb.Client()
|
|
with client.context():
|
|
lookup_query = Xml.query(Xml.xml_hash == xml_hash)
|
|
lookup_result = lookup_query.get()
|
|
if lookup_result:
|
|
xml_key = lookup_result.key.string_id()
|
|
else:
|
|
trials = 0
|
|
result = True
|
|
while result:
|
|
trials += 1
|
|
if trials == 100:
|
|
raise Exception("Sorry, the generator failed to get a key for you.")
|
|
xml_key = keyGen()
|
|
result = Xml.get_by_id(xml_key)
|
|
row = Xml(id = xml_key, xml_hash = xml_hash, xml_content = xml_content)
|
|
row.put()
|
|
return xml_key
|
|
|
|
|
|
def keyToXml(key_provided):
|
|
# Retrieve stored XML based on the provided key.
|
|
# Normalize the string.
|
|
key_provided = key_provided.lower().strip()
|
|
# Check datastore for a match.
|
|
client = ndb.Client()
|
|
with client.context():
|
|
result = Xml.get_by_id(key_provided)
|
|
if not result:
|
|
xml = ""
|
|
else:
|
|
# Put it back into the datastore immediately, which updates the last
|
|
# accessed time.
|
|
with client.context():
|
|
result.put()
|
|
xml = result.xml_content
|
|
return xml
|
|
|
|
|
|
def app(environ, start_response):
|
|
forms = cgi.FieldStorage(fp=environ['wsgi.input'], environ=environ)
|
|
if "xml" in forms:
|
|
out = xmlToKey(forms["xml"].value)
|
|
elif "key" in forms:
|
|
out = keyToXml(forms["key"].value)
|
|
else:
|
|
out = ""
|
|
|
|
headers = [
|
|
("Content-Type", "text/plain")
|
|
]
|
|
start_response("200 OK", headers)
|
|
return [out.encode("utf-8")]
|