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119 lines (91 loc) · 2.94 KB
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# coding: utf-8
import sys
from datetime import datetime
import leancloud
from flask import Flask, jsonify, request
from flask import render_template
from flask_sockets import Sockets
from leancloud import LeanCloudError
from views.todos import todos_view
app = Flask(__name__)
sockets = Sockets(app)
# routing
app.register_blueprint(todos_view, url_prefix='/todos')
@app.route('/')
def index():
return render_template('index.html')
@app.route('/time')
def time():
return str(datetime.now())
@app.route('/version')
def print_version():
import sys
return sys.version
@sockets.route('/echo')
def echo_socket(ws):
while True:
message = ws.receive()
ws.send(message)
# REST API example
class BadGateway(Exception):
status_code = 502
def __init__(self, message, status_code=None, payload=None):
Exception.__init__(self)
self.message = message
if status_code is not None:
self.status_code = status_code
self.payload = payload
def to_json(self):
rv = dict(self.payload or ())
rv['message'] = self.message
return jsonify(rv)
class BadRequest(Exception):
status_code = 400
def __init__(self, message, status_code=None, payload=None):
Exception.__init__(self)
self.message = message
if status_code is not None:
self.status_code = status_code
self.payload = payload
def to_json(self):
rv = dict(self.payload or ())
rv['message'] = self.message
return jsonify(rv)
@app.errorhandler(BadGateway)
def handle_bad_gateway(error):
response = error.to_json()
response.status_code = error.status_code
return response
@app.errorhandler(BadRequest)
def handle_bad_request(error):
response = error.to_json()
response.status_code = error.status_code
return response
@app.route('/api/python-version', methods=['GET'])
def python_version():
return jsonify({"python-version": sys.version})
@app.route('/api/todos', methods=['GET', 'POST'])
def todos():
if request.method == 'GET':
try:
todo_list = leancloud.Query(leancloud.Object.extend('Todo')).descending('createdAt').find()
except LeanCloudError as e:
if e.code == 101: # Class does not exist on the cloud.
return jsonify([])
else:
raise BadGateway(e.error, e.code)
else:
return jsonify([todo.dump() for todo in todo_list])
elif request.method == 'POST':
try:
content = request.get_json()['content']
except KeyError:
raise BadRequest('''receives malformed POST content (proper schema: '{"content": "TODO CONTENT"}')''')
todo = leancloud.Object.extend('Todo')()
todo.set('content', content)
try:
todo.save()
except LeanCloudError as e:
raise BadGateway(e.error, e.code)
else:
return jsonify(success=True)