2016-09-15 19:53:01 +00:00
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library angel_framework.http.server;
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import 'dart:async';
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import 'dart:io';
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import 'dart:math' show Random;
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2016-09-17 16:12:25 +00:00
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import 'dart:mirrors';
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2016-11-28 00:49:27 +00:00
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import 'package:angel_route/angel_route.dart';
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2016-09-15 19:53:01 +00:00
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import 'package:json_god/json_god.dart' as god;
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import 'angel_base.dart';
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import 'angel_http_exception.dart';
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import 'controller.dart';
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2016-12-10 14:12:07 +00:00
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import 'fatal_error.dart';
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2016-09-15 19:53:01 +00:00
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import 'request_context.dart';
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import 'response_context.dart';
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import 'routable.dart';
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import 'service.dart';
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2016-09-17 16:12:25 +00:00
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export 'package:container/container.dart';
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2016-02-28 13:11:17 +00:00
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2016-10-22 20:41:36 +00:00
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final RegExp _straySlashes = new RegExp(r'(^/+)|(/+$)');
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2016-04-18 03:27:23 +00:00
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/// A function that binds an [Angel] server to an Internet address and port.
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2016-02-28 13:11:17 +00:00
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typedef Future<HttpServer> ServerGenerator(InternetAddress address, int port);
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2016-05-02 22:28:14 +00:00
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/// Handles an [AngelHttpException].
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2016-09-17 16:12:25 +00:00
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typedef Future AngelErrorHandler(
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AngelHttpException err, RequestContext req, ResponseContext res);
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2016-05-02 22:28:14 +00:00
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2016-09-15 19:53:01 +00:00
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/// A function that configures an [AngelBase] server in some way.
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typedef Future AngelConfigurer(AngelBase app);
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2016-04-18 03:27:23 +00:00
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2016-02-28 13:11:17 +00:00
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/// A powerful real-time/REST/MVC server class.
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2016-09-15 19:53:01 +00:00
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class Angel extends AngelBase {
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2016-12-10 14:12:07 +00:00
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StreamController<HttpRequest> _afterProcessed =
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new StreamController<HttpRequest>.broadcast();
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StreamController<HttpRequest> _beforeProcessed =
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new StreamController<HttpRequest>.broadcast();
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StreamController<AngelFatalError> _fatalErrorStream =
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new StreamController<AngelFatalError>.broadcast();
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StreamController<Controller> _onController =
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new StreamController<Controller>.broadcast();
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2016-10-22 20:41:36 +00:00
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final Random _rand = new Random.secure();
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2016-11-24 07:12:53 +00:00
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ServerGenerator _serverGenerator = HttpServer.bind;
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2016-09-17 16:12:25 +00:00
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/// Fired after a request is processed. Always runs.
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Stream<HttpRequest> get afterProcessed => _afterProcessed.stream;
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2016-07-04 18:06:31 +00:00
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2016-07-05 22:11:54 +00:00
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/// Fired before a request is processed. Always runs.
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2016-07-04 18:06:31 +00:00
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Stream<HttpRequest> get beforeProcessed => _beforeProcessed.stream;
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2016-07-05 22:11:54 +00:00
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2016-09-19 06:52:21 +00:00
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/// Fired on fatal errors.
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2016-12-10 14:12:07 +00:00
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Stream<AngelFatalError> get fatalErrorStream => _fatalErrorStream.stream;
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2016-09-19 06:52:21 +00:00
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2016-07-05 22:11:54 +00:00
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/// Fired whenever a controller is added to this instance.
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///
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/// **NOTE**: This is a broadcast stream.
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Stream<Controller> get onController => _onController.stream;
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2016-12-19 01:38:23 +00:00
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/// Always run before responses are sent.
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///
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/// These will only not run if an [AngelFatalError] occurs.
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final List<RequestHandler> responseFinalizers = [];
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Angel.secure, fallback routes, 404, app.addRoute, app.all, services are a go (just missing params, i.e. $sort?), now have service.app, app.before, app.after, angel.configure now uses futures, errors are implemented
2016-04-29 00:01:58 +00:00
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/// Default error handler, show HTML error page
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2016-09-17 16:12:25 +00:00
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AngelErrorHandler _errorHandler =
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(AngelHttpException e, req, ResponseContext res) {
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2016-12-19 01:38:23 +00:00
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res.heades[HttpHeaders.CONTENT_TYPE] = ContentType.HTML.toString();
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res.statusCode = e.statusCode;
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2016-07-03 22:23:55 +00:00
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res.write("<!DOCTYPE html><html><head><title>${e.message}</title>");
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Angel.secure, fallback routes, 404, app.addRoute, app.all, services are a go (just missing params, i.e. $sort?), now have service.app, app.before, app.after, angel.configure now uses futures, errors are implemented
2016-04-29 00:01:58 +00:00
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res.write("</head><body><h1>${e.message}</h1><ul>");
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for (String error in e.errors) {
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res.write("<li>$error</li>");
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}
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res.write("</ul></body></html>");
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res.end();
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};
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2016-09-21 05:10:21 +00:00
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/// The handler currently configured to run on [AngelHttpException]s.
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AngelErrorHandler get errorHandler => _errorHandler;
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2016-05-02 22:28:14 +00:00
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/// [RequestMiddleware] to be run before all requests.
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Angel.secure, fallback routes, 404, app.addRoute, app.all, services are a go (just missing params, i.e. $sort?), now have service.app, app.before, app.after, angel.configure now uses futures, errors are implemented
2016-04-29 00:01:58 +00:00
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List before = [];
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2016-05-02 22:28:14 +00:00
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/// [RequestMiddleware] to be run after all requests.
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Angel.secure, fallback routes, 404, app.addRoute, app.all, services are a go (just missing params, i.e. $sort?), now have service.app, app.before, app.after, angel.configure now uses futures, errors are implemented
2016-04-29 00:01:58 +00:00
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List after = [];
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2016-04-18 03:27:23 +00:00
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2016-06-21 22:56:04 +00:00
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/// The native HttpServer running this instancce.
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2016-04-18 03:27:23 +00:00
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HttpServer httpServer;
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2016-10-22 20:41:36 +00:00
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/// Handles a server error.
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2016-12-10 14:12:07 +00:00
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_onError(e, [StackTrace st]) {
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_fatalErrorStream.add(new AngelFatalError(error: e, stack: st));
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2016-10-22 20:41:36 +00:00
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}
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void _printDebug(x) {
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if (debug) print(x);
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}
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String _randomString(int length) {
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var codeUnits = new List.generate(length, (index) {
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return _rand.nextInt(33) + 89;
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});
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return new String.fromCharCodes(codeUnits);
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}
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2016-06-21 22:56:04 +00:00
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/// Starts the server.
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///
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/// Returns false on failure; otherwise, returns the HttpServer.
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2016-09-17 16:12:25 +00:00
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Future<HttpServer> startServer([InternetAddress address, int port]) async {
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2016-11-22 04:58:53 +00:00
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final host = address ?? InternetAddress.LOOPBACK_IP_V4;
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2016-11-23 09:10:47 +00:00
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this.httpServer = await _serverGenerator(host, port ?? 0);
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return httpServer..listen(handleRequest);
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2016-07-04 18:06:31 +00:00
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}
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2016-09-17 16:12:25 +00:00
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/// Loads some base dependencies into the service container.
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void bootstrapContainer() {
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container.singleton(this, as: AngelBase);
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2016-11-23 19:50:17 +00:00
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container.singleton(this, as: Routable);
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container.singleton(this, as: Router);
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2016-09-17 16:12:25 +00:00
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container.singleton(this);
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2016-09-18 02:59:06 +00:00
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if (runtimeType != Angel) container.singleton(this, as: Angel);
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2016-09-17 16:12:25 +00:00
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}
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2016-10-22 20:41:36 +00:00
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Future<bool> executeHandler(
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2016-09-17 16:12:25 +00:00
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handler, RequestContext req, ResponseContext res) async {
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2016-05-02 22:28:14 +00:00
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if (handler is RequestMiddleware) {
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2016-04-21 20:37:02 +00:00
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var result = await handler(req, res);
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2016-09-17 16:12:25 +00:00
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2016-04-21 20:37:02 +00:00
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if (result is bool)
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return result == true;
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else if (result != null) {
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res.json(result);
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return false;
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Angel.secure, fallback routes, 404, app.addRoute, app.all, services are a go (just missing params, i.e. $sort?), now have service.app, app.before, app.after, angel.configure now uses futures, errors are implemented
2016-04-29 00:01:58 +00:00
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} else
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return res.isOpen;
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2016-04-18 03:27:23 +00:00
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}
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2016-04-21 20:37:02 +00:00
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if (handler is RequestHandler) {
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2016-04-18 03:27:23 +00:00
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await handler(req, res);
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return res.isOpen;
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2016-09-17 16:12:25 +00:00
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}
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if (handler is Future) {
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var result = await handler;
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if (result is bool)
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return result == true;
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else if (result != null) {
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res.json(result);
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return false;
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} else
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return true;
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}
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if (handler is Function) {
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var result = await runContained(handler, req, res);
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2016-04-21 20:37:02 +00:00
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if (result is bool)
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return result == true;
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else if (result != null) {
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res.json(result);
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return false;
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Angel.secure, fallback routes, 404, app.addRoute, app.all, services are a go (just missing params, i.e. $sort?), now have service.app, app.before, app.after, angel.configure now uses futures, errors are implemented
2016-04-29 00:01:58 +00:00
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} else
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return true;
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2016-09-17 16:12:25 +00:00
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}
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if (requestMiddleware.containsKey(handler)) {
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2016-10-22 20:41:36 +00:00
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return await executeHandler(requestMiddleware[handler], req, res);
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2016-04-18 03:27:23 +00:00
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}
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2016-09-17 16:12:25 +00:00
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res.willCloseItself = true;
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2016-11-23 19:50:17 +00:00
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res.io.write(god.serialize(handler));
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await res.io.close();
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2016-09-17 16:12:25 +00:00
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return false;
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2016-04-18 03:27:23 +00:00
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}
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2016-10-22 20:41:36 +00:00
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Future handleRequest(HttpRequest request) async {
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_beforeProcessed.add(request);
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final req = await RequestContext.from(request, this);
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final res = new ResponseContext(request.response, this);
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2016-11-23 19:50:17 +00:00
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String requestedUrl = request.uri.path.replaceAll(_straySlashes, '');
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2016-10-22 20:41:36 +00:00
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if (requestedUrl.isEmpty) requestedUrl = '/';
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2016-11-28 00:49:27 +00:00
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final resolved =
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resolveAll(requestedUrl, requestedUrl, method: request.method);
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2016-10-22 20:41:36 +00:00
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2016-11-28 00:49:27 +00:00
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for (final result in resolved) req.params.addAll(result.allParams);
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2016-11-23 19:50:17 +00:00
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if (resolved.isNotEmpty) {
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2016-11-28 00:49:27 +00:00
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final route = resolved.first.route;
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req.inject(Match, route.match(requestedUrl));
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2016-11-23 19:50:17 +00:00
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}
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2016-10-22 20:41:36 +00:00
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2016-11-28 00:49:27 +00:00
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final m = new MiddlewarePipeline(resolved);
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2016-12-19 01:38:23 +00:00
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req.inject(MiddlewarePipeline, m);
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2016-11-28 00:49:27 +00:00
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final pipeline = []..addAll(before)..addAll(m.handlers)..addAll(after);
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2016-10-22 20:41:36 +00:00
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2016-11-23 19:50:17 +00:00
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_printDebug('Handler sequence on $requestedUrl: $pipeline');
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for (final handler in pipeline) {
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2016-10-22 20:41:36 +00:00
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try {
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_printDebug('Executing handler: $handler');
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final result = await executeHandler(handler, req, res);
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_printDebug('Result: $result');
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if (!result) {
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_printDebug('Last executed handler: $handler');
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break;
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} else {
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_printDebug(
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'Handler completed successfully, did not terminate response: $handler');
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}
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} catch (e, st) {
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_printDebug('Caught error in handler $handler: $e');
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_printDebug(st);
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if (e is AngelHttpException) {
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// Special handling for AngelHttpExceptions :)
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try {
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2016-12-19 01:38:23 +00:00
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res.statusCode = e.statusCode;
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2016-10-22 20:41:36 +00:00
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String accept = request.headers.value(HttpHeaders.ACCEPT);
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if (accept == "*/*" ||
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accept.contains(ContentType.JSON.mimeType) ||
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accept.contains("application/javascript")) {
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res.json(e.toMap());
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} else {
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await _errorHandler(e, req, res);
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}
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2016-12-19 01:38:23 +00:00
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// _finalizeResponse(request, res);
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2016-12-10 14:12:07 +00:00
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} catch (e, st) {
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2016-12-19 01:38:23 +00:00
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_fatalErrorStream.add(
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new AngelFatalError(request: request, error: e, stack: st));
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2016-10-22 20:41:36 +00:00
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}
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2016-12-10 17:10:21 +00:00
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} else {
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2016-12-19 01:38:23 +00:00
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_fatalErrorStream
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.add(new AngelFatalError(request: request, error: e, stack: st));
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2016-10-22 20:41:36 +00:00
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}
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break;
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}
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}
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2016-05-01 01:42:52 +00:00
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try {
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2016-10-07 21:39:41 +00:00
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_afterProcessed.add(request);
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2016-10-22 20:41:36 +00:00
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2016-05-01 01:42:52 +00:00
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if (!res.willCloseItself) {
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2016-12-19 01:38:23 +00:00
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for (var finalizer in responseFinalizers) {
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await finalizer(req, res);
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}
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for (var key in res.headers.keys) {
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request.response.headers.set(key, res.headers[key]);
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}
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request.response
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..statusCode = res.statusCode
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..cookies.addAll(res.cookies)
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..add(res.buffer.takeBytes());
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2016-05-01 01:42:52 +00:00
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await request.response.close();
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}
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} catch (e) {
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2016-09-17 16:12:25 +00:00
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failSilently(request, res);
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2016-04-22 01:42:39 +00:00
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}
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}
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2016-09-17 16:12:25 +00:00
|
|
|
// Run a function after injecting from service container
|
2016-09-18 02:59:06 +00:00
|
|
|
Future runContained(Function handler, RequestContext req, ResponseContext res,
|
2016-11-23 19:50:17 +00:00
|
|
|
{Map<String, dynamic> namedParameters}) async {
|
2016-09-17 16:12:25 +00:00
|
|
|
ClosureMirror closureMirror = reflect(handler);
|
|
|
|
|
List args = [];
|
|
|
|
|
|
|
|
|
|
for (ParameterMirror parameter in closureMirror.function.parameters) {
|
|
|
|
|
if (parameter.type.reflectedType == RequestContext)
|
|
|
|
|
args.add(req);
|
|
|
|
|
else if (parameter.type.reflectedType == ResponseContext)
|
|
|
|
|
args.add(res);
|
|
|
|
|
else {
|
|
|
|
|
// First, search to see if we can map this to a type
|
2016-11-23 19:50:17 +00:00
|
|
|
if (req.injections.containsKey(parameter.type.reflectedType)) {
|
|
|
|
|
args.add(req.injections[parameter.type.reflectedType]);
|
|
|
|
|
continue;
|
2016-09-17 16:12:25 +00:00
|
|
|
} else {
|
|
|
|
|
String name = MirrorSystem.getName(parameter.simpleName);
|
|
|
|
|
|
2016-09-18 02:59:06 +00:00
|
|
|
if (req.params.containsKey(name))
|
|
|
|
|
args.add(req.params[name]);
|
|
|
|
|
else if (name == "req")
|
2016-09-17 16:12:25 +00:00
|
|
|
args.add(req);
|
|
|
|
|
else if (name == "res")
|
|
|
|
|
args.add(res);
|
2016-11-23 19:50:17 +00:00
|
|
|
else if (req.injections.containsKey(name))
|
|
|
|
|
args.add(req.injections[name]);
|
|
|
|
|
else if (parameter.type.reflectedType != dynamic) {
|
|
|
|
|
args.add(container.make(parameter.type.reflectedType,
|
|
|
|
|
injecting: req.injections));
|
|
|
|
|
} else {
|
2016-09-18 02:59:06 +00:00
|
|
|
throw new Exception(
|
|
|
|
|
"Cannot resolve parameter '$name' within handler.");
|
2016-09-17 16:12:25 +00:00
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
return await closureMirror.apply(args).reflectee;
|
|
|
|
|
}
|
|
|
|
|
|
2016-04-18 03:27:23 +00:00
|
|
|
/// Applies an [AngelConfigurer] to this instance.
|
Angel.secure, fallback routes, 404, app.addRoute, app.all, services are a go (just missing params, i.e. $sort?), now have service.app, app.before, app.after, angel.configure now uses futures, errors are implemented
2016-04-29 00:01:58 +00:00
|
|
|
Future configure(AngelConfigurer configurer) async {
|
|
|
|
|
await configurer(this);
|
2016-07-05 22:11:54 +00:00
|
|
|
|
2016-11-28 00:49:27 +00:00
|
|
|
if (configurer is Controller)
|
|
|
|
|
_onController.add(controllers[configurer.exposeDecl.path] = configurer);
|
2016-02-28 13:11:17 +00:00
|
|
|
}
|
|
|
|
|
|
2016-09-17 16:12:25 +00:00
|
|
|
/// Fallback when an error is thrown while handling a request.
|
|
|
|
|
void failSilently(HttpRequest request, ResponseContext res) {}
|
|
|
|
|
|
2016-02-28 13:11:17 +00:00
|
|
|
/// Starts the server.
|
|
|
|
|
void listen({InternetAddress address, int port: 3000}) {
|
|
|
|
|
runZoned(() async {
|
2016-04-18 03:27:23 +00:00
|
|
|
await startServer(address, port);
|
Angel.secure, fallback routes, 404, app.addRoute, app.all, services are a go (just missing params, i.e. $sort?), now have service.app, app.before, app.after, angel.configure now uses futures, errors are implemented
2016-04-29 00:01:58 +00:00
|
|
|
}, onError: _onError);
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
@override
|
2016-05-02 22:28:14 +00:00
|
|
|
use(Pattern path, Routable routable,
|
2016-10-22 20:41:36 +00:00
|
|
|
{bool hooked: true, String namespace: null}) {
|
2016-11-28 00:49:27 +00:00
|
|
|
if (routable is Angel) {
|
|
|
|
|
final head = path.toString().replaceAll(_straySlashes, '');
|
|
|
|
|
|
|
|
|
|
routable.controllers.forEach((k, v) {
|
|
|
|
|
final tail = k.toString().replaceAll(_straySlashes, '');
|
|
|
|
|
controllers['$head/$tail'.replaceAll(_straySlashes, '')] = v;
|
|
|
|
|
});
|
|
|
|
|
}
|
|
|
|
|
|
Angel.secure, fallback routes, 404, app.addRoute, app.all, services are a go (just missing params, i.e. $sort?), now have service.app, app.before, app.after, angel.configure now uses futures, errors are implemented
2016-04-29 00:01:58 +00:00
|
|
|
if (routable is Service) {
|
|
|
|
|
routable.app = this;
|
|
|
|
|
}
|
2016-10-22 20:41:36 +00:00
|
|
|
|
|
|
|
|
return super.use(path, routable, hooked: hooked, namespace: namespace);
|
2016-02-28 13:11:17 +00:00
|
|
|
}
|
|
|
|
|
|
2016-06-21 22:56:04 +00:00
|
|
|
/// Registers a callback to run upon errors.
|
|
|
|
|
onError(AngelErrorHandler handler) {
|
Angel.secure, fallback routes, 404, app.addRoute, app.all, services are a go (just missing params, i.e. $sort?), now have service.app, app.before, app.after, angel.configure now uses futures, errors are implemented
2016-04-29 00:01:58 +00:00
|
|
|
_errorHandler = handler;
|
|
|
|
|
}
|
2016-04-22 01:42:39 +00:00
|
|
|
|
2016-10-22 20:41:36 +00:00
|
|
|
Angel({bool debug: false}) : super(debug: debug) {
|
2016-09-17 16:12:25 +00:00
|
|
|
bootstrapContainer();
|
|
|
|
|
}
|
2016-02-28 13:11:17 +00:00
|
|
|
|
2016-04-18 03:27:23 +00:00
|
|
|
/// Creates an HTTPS server.
|
Angel.secure, fallback routes, 404, app.addRoute, app.all, services are a go (just missing params, i.e. $sort?), now have service.app, app.before, app.after, angel.configure now uses futures, errors are implemented
2016-04-29 00:01:58 +00:00
|
|
|
/// Provide paths to a certificate chain and server key (both .pem).
|
|
|
|
|
/// If no password is provided, a random one will be generated upon running
|
|
|
|
|
/// the server.
|
2016-11-23 19:50:17 +00:00
|
|
|
factory Angel.secure(String certificateChainPath, String serverKeyPath,
|
|
|
|
|
{bool debug: false, String password}) {
|
|
|
|
|
final app = new Angel(debug: debug);
|
|
|
|
|
|
|
|
|
|
app._serverGenerator = (InternetAddress address, int port) async {
|
Angel.secure, fallback routes, 404, app.addRoute, app.all, services are a go (just missing params, i.e. $sort?), now have service.app, app.before, app.after, angel.configure now uses futures, errors are implemented
2016-04-29 00:01:58 +00:00
|
|
|
var certificateChain =
|
2016-11-23 09:10:47 +00:00
|
|
|
Platform.script.resolve(certificateChainPath).toFilePath();
|
|
|
|
|
var serverKey = Platform.script.resolve(serverKeyPath).toFilePath();
|
Angel.secure, fallback routes, 404, app.addRoute, app.all, services are a go (just missing params, i.e. $sort?), now have service.app, app.before, app.after, angel.configure now uses futures, errors are implemented
2016-04-29 00:01:58 +00:00
|
|
|
var serverContext = new SecurityContext();
|
|
|
|
|
serverContext.useCertificateChain(certificateChain);
|
|
|
|
|
serverContext.usePrivateKey(serverKey,
|
2016-11-23 19:50:17 +00:00
|
|
|
password: password ?? app._randomString(8));
|
Angel.secure, fallback routes, 404, app.addRoute, app.all, services are a go (just missing params, i.e. $sort?), now have service.app, app.before, app.after, angel.configure now uses futures, errors are implemented
2016-04-29 00:01:58 +00:00
|
|
|
|
|
|
|
|
return await HttpServer.bindSecure(address, port, serverContext);
|
|
|
|
|
};
|
2016-11-23 19:50:17 +00:00
|
|
|
|
|
|
|
|
return app;
|
Angel.secure, fallback routes, 404, app.addRoute, app.all, services are a go (just missing params, i.e. $sort?), now have service.app, app.before, app.after, angel.configure now uses futures, errors are implemented
2016-04-29 00:01:58 +00:00
|
|
|
}
|
|
|
|
|
}
|
