nuVistA/main.py

#!/usr/bin/env python3

import json
import secrets
import string
from flask import Flask, request, send_from_directory
from flask.json import jsonify
from flask.json.provider import DefaultJSONProvider

import rpc
import util
import protoswitch

import logging

logger = logging.getLogger(__name__)
handler = logging.StreamHandler()
handler.setFormatter(logging.Formatter('%(asctime)s %(name)-12s %(levelname)-8s %(message)s'))
logger.addHandler(handler)
logger.setLevel(logging.WARNING)

class JSONProviderX(DefaultJSONProvider):
	@staticmethod
	def default(obj):
		return json.dumps(obj, sort_keys=True, default=str)

class CacheProxyRPC(util.CacheProxy):
	def __init__(self, obj, persistent=None, volatile=None, prefix=''):
		util.CacheProxy.__init__(self, obj)
		if volatile is None:
			volatile = util.Store().memo
		self._cache(('__call__', 'close', 'authenticate', 'keepalive', 'XWB_CREATE_CONTEXT', 'TIU_TEMPLATE_SET_ITEMS', 'TIU_TEMPLATE_CREATE/MODIFY', 'TIU_TEMPLATE_DELETE', 'TIU_TEMPLATE_LOCK', 'TIU_TEMPLATE_UNLOCK', 'ORWDX_SAVE', 'ORWDXM1_BLDQRSP'), None)
		self._cache(('XWB_GET_BROKER_INFO', 'XUS_INTRO_MSG'), volatile, prefix=prefix, ttl=float('inf'))
		self._cache(None, volatile, prefix=prefix, ttl=float('-inf'))
		self._cache_persistent(persistent=persistent, prefix=prefix)
	def _cache_persistent(self, persistent=None, prefix=''):
		if persistent is None:
			persistent = util.Store().memo
		self._cache(('SDEC_RESOURCE', 'ORWU1_NEWLOC', 'ORWLRR_ALLTESTS_ALL', 'ORWORDG_ALLTREE', 'ORWORDG_REVSTS', 'ORWDX_DGNM', 'ORWDX_ORDITM'), persistent, prefix=prefix, ttl=float('inf'))

def jsonify_result(value, id=None):
	return jsonify({ 'result': value._base, 'error': None, 'id': request.json.get('id'), 'ts': value._ts } if isinstance(value, util.Cached) else { 'result': value, 'error': None, 'id': request.json.get('id') })

def jsonify_error(ex, id=None):
	return jsonify({ 'result': None, 'error': { 'type': ex.__class__.__name__, 'args': ex.args }, 'id': id })

def application():
	app = Flask(__name__)
	app.json = JSONProviderX(app)

	app.secret = secret = ''.join(secrets.choice(string.ascii_lowercase + string.digits) for i in range(64))
	clients = {}

	@app.get('/')
	def cb_index():
		return send_from_directory('./htdocs', 'index.html')

	@app.post('/v1/vista')
	def cb_connect():
		params = request.json['params']
		try:
			if params.get('secret') == secret:
				cid = ''.join(secrets.choice(string.ascii_lowercase + string.digits) for i in range(64))
				while cid in clients:
					cid = ''.join(secrets.choice(string.ascii_lowercase + string.digits) for i in range(64))
				clients[cid] = client = CacheProxyRPC(rpc.ClientSync(host=params.get('host', 'test.northport.med.va.gov'), port=int(params.get('port', 19009))))
				return jsonify_result(cid, id=request.json.get('id'))
			else:
				return jsonify({ 'result': None, 'error': { 'type': 'Unauthorized', 'args': [] }, 'id': request.json.get('id') })
		except Exception as ex:
			logger.exception(request.url)
			return jsonify_error(ex, id=request.json.get('id'))

	@app.post('/v1/vista/<cid>/close')
	def cb_close(cid):
		try:
			client = clients[cid]
			res = client.close()
			del clients[cid]
			return jsonify_result(res, id=request.json.get('id'))
		except Exception as ex:
			logger.exception(request.url)
			return jsonify_error(ex, id=request.json.get('id'))

	@app.post('/v1/vista/<cid>/serverinfo')
	def cb_serverinfo(cid):
		try:
			client = clients[cid]
			return jsonify_result(client._obj._server, id=request.json.get('id'))
		except Exception as ex:
			logger.exception(request.url)
			return jsonify_error(ex, id=request.json.get('id'))

	@app.post('/v1/vista/<cid>/userinfo')
	def cb_userinfo(cid):
		try:
			client = clients[cid]
			return jsonify_result(client._obj._user, id=request.json.get('id'))
		except Exception as ex:
			logger.exception(request.url)
			return jsonify_error(ex, id=request.json.get('id'))

	@app.post('/v1/vista/<cid>/authenticate')
	def cb_authenticate(cid):
		params = request.json['params']
		try:
			client = clients[cid]
			if 'avcode' in params:
				user = client.authenticate(params['avcode'])
				client._cache_persistent(persistent=util.Store(f'cache.{client._server["volume"].lower()}.{client._server["uci"].lower()}.{user[0]}.db', journal_mode='WAL').memo)
				return jsonify_result(user, id=request.json.get('id'))
			else:
				from auth import XUIAMSSOi_MySsoTokenVBA
				if token := XUIAMSSOi_MySsoTokenVBA():
					user = client.authenticate(token)
					client._cache_persistent(persistent=util.Store(f'cache.{client._server["volume"].lower()}.{client._server["uci"].lower()}.{user[0]}.db', journal_mode='WAL').memo)
					return jsonify_result(user, id=request.json.get('id'))
				else:
					return jsonify({ 'result': None, 'error': { 'type': 'Unauthorized', 'args': [] }, 'id': request.json.get('id') })
		except Exception as ex:
			logger.exception(request.url)
			return jsonify_error(ex, id=request.json.get('id'))

	@app.post('/v1/vista/<cid>')
	def cb_call1(cid):
		try:
			client = clients[cid]
			data = request.json
			kw = {}
			if 'context' in data:
				kw['context'] = data['context']
			thunk = getattr(client, data['method'].upper())
			if getattr(thunk, 'cached', False):
				if 'ttl' in data:
					kw['_cache_ttl'] = data['ttl']
				if 'stale' in data:
					kw['_cache_stale'] = data['stale']
			return jsonify_result(thunk(*data.get('params', ()), **kw), id=data.get('id'))
		except Exception as ex:
			logger.exception(request.url)
			return jsonify_error(ex, id=request.json.get('id'))

	@app.post('/v1/vista/<cid>/<method>')
	def cb_call2(cid, method):
		try:
			client = clients[cid]
			data = request.json
			kw = {}
			if 'context' in data:
				kw['context'] = data['context']
			thunk = getattr(client, method.upper())
			if getattr(thunk, 'cached', False):
				if 'ttl' in data:
					kw['_cache_ttl'] = data['ttl']
				if 'stale' in data:
					kw['_cache_stale'] = data['stale']
			return jsonify_result(thunk(*data.get('params', ()), **kw), id=data.get('id'))
		except Exception as ex:
			logger.exception(request.url)
			return jsonify_error(ex, id=request.json.get('id'))

	@app.get('/<path:path>')
	def cb_static(path):
		return send_from_directory('./htdocs', path if '.' in path.rsplit('/', 1)[-1] else 'index.html')

	return app

def get_port():
	import socket
	sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
	sock.bind(('localhost', 0))
	port = sock.getsockname()[1]
	sock.close()
	return port

if __name__ == '__main__':
	import webbrowser

	app = application()
	port = get_port()
	print(f'http://localhost:{port}/#{app.secret}')
	webbrowser.open(f'http://localhost:{port}/#{app.secret}')
	app.run(port=port, request_handler=protoswitch.SwitchingRequestHandler)