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GNU GENERAL PUBLIC LICENSE MIT License
Version 3, 29 June 2007
Copyright (c) 2016 The Angel Framework
Copyright (C) 2007 Free Software Foundation, Inc. <http://fsf.org/>
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How to Apply These Terms to Your New Programs
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{one line to give the program's name and a brief idea of what it does.}
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Also add information on how to contact you by electronic and paper mail.
If the program does terminal interaction, make it output a short
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The hypothetical commands `show w' and `show c' should show the appropriate
parts of the General Public License. Of course, your program's commands
might be different; for a GUI interface, you would use an "about box".
You should also get your employer (if you work as a programmer) or school,
if any, to sign a "copyright disclaimer" for the program, if necessary.
For more information on this, and how to apply and follow the GNU GPL, see
<http://www.gnu.org/licenses/>.
The GNU General Public License does not permit incorporating your program
into proprietary programs. If your program is a subroutine library, you
may consider it more useful to permit linking proprietary applications with
the library. If this is what you want to do, use the GNU Lesser General
Public License instead of this License. But first, please read
<http://www.gnu.org/philosophy/why-not-lgpl.html>.

1
lib/src/http/angel_base.dart
View file

@ -7,6 +7,7 @@ import 'routable.dart';
/// A function that asynchronously generates a view from the given path and data. /// A function that asynchronously generates a view from the given path and data.
typedef Future<String> ViewGenerator(String path, [Map data]); typedef Future<String> ViewGenerator(String path, [Map data]);
/// Base class for Angel servers. Do not bother extending this.
class AngelBase extends Routable { class AngelBase extends Routable {
AngelBase({bool debug: false}):super(debug: debug); AngelBase({bool debug: false}):super(debug: debug);

243
lib/src/http/controller.dart
View file

@ -3,142 +3,167 @@ library angel_framework.http.controller;
import 'dart:async'; import 'dart:async';
import 'dart:mirrors'; import 'dart:mirrors';
import 'package:angel_route/angel_route.dart'; import 'package:angel_route/angel_route.dart';
import 'angel_base.dart';
import 'angel_http_exception.dart'; import 'angel_http_exception.dart';
import 'metadata.dart'; import 'metadata.dart';
import 'request_context.dart'; import 'request_context.dart';
import 'response_context.dart'; import 'response_context.dart';
import 'routable.dart'; import 'routable.dart';
import 'server.dart' show Angel;
/// Contains a list of the data required for a DI-enabled method to run.
///
/// This improves performance by removing the necessity to reflect a method
/// every time it is requested.
///
/// Regular request handlers can also skip DI entirely, lowering response time
/// and memory use.
class InjectionRequest {
/// A list of the data required for a DI-enabled method to run.
final List required = [];
}
/// Supports grouping routes with shared functionality.
class Controller { class Controller {
AngelBase app; Angel _app;
Angel get app => _app;
final bool debug;
List middleware = []; List middleware = [];
Map<String, Route> routeMappings = {}; Map<String, Route> routeMappings = {};
Expose exposeDecl; Expose exposeDecl;
Future call(AngelBase app) async { Controller({this.debug: false});
this.app = app;
Future call(Angel app) async {
_app = app;
// Load global expose decl // Load global expose decl
ClassMirror classMirror = reflectClass(this.runtimeType); ClassMirror classMirror = reflectClass(this.runtimeType);
Expose exposeDecl = classMirror.metadata
for (InstanceMirror metadatum in classMirror.metadata) { .map((m) => m.reflectee)
if (metadatum.reflectee is Expose) { .firstWhere((r) => r is Expose, orElse: () => null);
exposeDecl = metadatum.reflectee;
break;
}
}
if (exposeDecl == null) { if (exposeDecl == null) {
throw new Exception( throw new Exception(
"All controllers must carry an @Expose() declaration."); "All controllers must carry an @Expose() declaration.");
} }
final routable = new Routable(debug: true); var routable = new Routable(debug: debug);
configureRoutes(routable);
app.use(exposeDecl.path, routable); app.use(exposeDecl.path, routable);
TypeMirror typeMirror = reflectType(this.runtimeType); TypeMirror typeMirror = reflectType(this.runtimeType);
String name = exposeDecl.as; String name = exposeDecl.as?.isNotEmpty == true
? exposeDecl.as
if (name == null || name.isEmpty) : MirrorSystem.getName(typeMirror.simpleName);
name = MirrorSystem.getName(typeMirror.simpleName);
app.controllers[name] = this; app.controllers[name] = this;
}
_callback(InstanceMirror instanceMirror, Routable routable, List handlers) { // Pre-reflect methods
return (Symbol key, MethodMirror methodMirror) {
if (methodMirror.isRegularMethod &&
key != #toString &&
key != #noSuchMethod &&
key != #call &&
key != #equals &&
key != #==) {
InstanceMirror exposeMirror = methodMirror.metadata.firstWhere(
(mirror) => mirror.reflectee is Expose,
orElse: () => null);
if (exposeMirror != null) {
RequestHandler handler =
(RequestContext req, ResponseContext res) async {
List args = [];
// Load parameters, and execute
for (int i = 0; i < methodMirror.parameters.length; i++) {
ParameterMirror parameter = methodMirror.parameters[i];
if (parameter.type.reflectedType == RequestContext)
args.add(req);
else if (parameter.type.reflectedType == ResponseContext)
args.add(res);
else {
String name = MirrorSystem.getName(parameter.simpleName);
var arg = req.params[name];
if (arg == null) {
if (req.injections.containsKey(name)) {
args.add(req.injections[name]);
continue;
} else if (name == "req") {
args.add(req);
continue;
} else if (name == "res") {
args.add(res);
continue;
}
final type = parameter.type.reflectedType;
if (req.injections.containsKey(type)) {
args.add(req.injections[type]);
continue;
}
if (type != dynamic) {
try {
args.add(app.container.make(type));
continue;
} catch (e) {
//
print(e);
print(req.injections);
}
}
if (!exposeMirror.reflectee.allowNull.contains(name))
throw new AngelHttpException.BadRequest(
message: "Missing parameter '$name'");
} else
args.add(arg);
}
}
return await instanceMirror.invoke(key, args).reflectee;
};
final middleware = []
..addAll(handlers)
..addAll(exposeMirror.reflectee.middleware);
final route = routable.addRoute(exposeMirror.reflectee.method,
exposeMirror.reflectee.path, handler,
middleware: middleware);
String name = exposeMirror.reflectee.as;
if (name == null || name.isEmpty) name = MirrorSystem.getName(key);
routeMappings[name] = route;
}
}
};
}
void configureRoutes(Routable routable) {
ClassMirror classMirror = reflectClass(this.runtimeType);
InstanceMirror instanceMirror = reflect(this); InstanceMirror instanceMirror = reflect(this);
final handlers = []..addAll(exposeDecl.middleware)..addAll(middleware); final handlers = []..addAll(exposeDecl.middleware)..addAll(middleware);
final callback = _callback(instanceMirror, routable, handlers); final routeBuilder = _routeBuilder(instanceMirror, routable, handlers);
classMirror.instanceMembers.forEach(callback); classMirror.instanceMembers.forEach(routeBuilder);
configureRoutes(routable);
}
Function _routeBuilder(
InstanceMirror instanceMirror, Routable routable, List handlers) {
return (Symbol methodName, MethodMirror method) {
if (method.isRegularMethod &&
methodName != #toString &&
methodName != #noSuchMethod &&
methodName != #call &&
methodName != #equals &&
methodName != #==) {
Expose exposeDecl = method.metadata
.map((m) => m.reflectee)
.firstWhere((r) => r is Expose, orElse: () => null);
if (exposeDecl == null) return;
var reflectedMethod = instanceMirror.getField(methodName).reflectee;
var middleware = []..addAll(handlers)..addAll(exposeDecl.middleware);
var injection = new InjectionRequest();
// Check if normal
if (method.parameters.length == 2 &&
method.parameters[0].type.reflectedType == RequestContext &&
method.parameters[1].type.reflectedType == ResponseContext) {
// Create a regular route
routable.addRoute(exposeDecl.method, exposeDecl.path, reflectedMethod,
middleware: middleware);
return;
}
// Load parameters
for (var parameter in method.parameters) {
var name = MirrorSystem.getName(parameter.simpleName);
var type = parameter.type.reflectedType;
if (type == RequestContext || type == ResponseContext) {
injection.required.add(type);
} else if (name == 'req') {
injection.required.add(RequestContext);
} else if (name == 'res') {
injection.required.add(ResponseContext);
} else if (type == dynamic) {
injection.required.add(name);
} else {
injection.required.add([name, type]);
} }
} }
routable.addRoute(exposeDecl.method, exposeDecl.path,
handleContained(reflectedMethod, injection),
middleware: middleware);
}
};
}
/// Used to add additional routes to the router from within a [Controller].
void configureRoutes(Routable routable) {}
}
/// Handles a request with a DI-enabled handler.
RequestHandler handleContained(handler, InjectionRequest injection) {
return (RequestContext req, ResponseContext res) async {
List args = [];
void inject(requirement) {
for (var requirement in injection.required) {
if (requirement == RequestContext) {
args.add(req);
} else if (requirement == ResponseContext) {
args.add(res);
} else if (requirement is String) {
if (req.params.containsKey(requirement)) {} else if (req.injections
.containsKey(requirement))
args.add(req.injections[requirement]);
else {
throw new Exception(
"Cannot resolve parameter '$requirement' within handler.");
}
args.add(req.params[requirement]);
} else if (requirement is List) {
for (var child in requirement) {
try {
inject(child);
break;
} catch (e) {
rethrow;
}
}
} else if (requirement is Type && requirement != dynamic) {
args.add(
req.app.container.make(requirement, injecting: req.injections));
} else {
throw new ArgumentError(
'$requirement cannot be injected into a request handler.');
}
}
}
injection.required.forEach(inject);
return Function.apply(handler, args);
};
}

28
lib/src/http/response_context.dart
View file

@ -15,6 +15,9 @@ final RegExp _contentType =
final RegExp _straySlashes = new RegExp(r'(^/+)|(/+$)'); final RegExp _straySlashes = new RegExp(r'(^/+)|(/+$)');
/// Serializes response data into a String.
typedef String ResponseSerializer(data);
/// A convenience wrapper around an outgoing HTTP request. /// A convenience wrapper around an outgoing HTTP request.
class ResponseContext extends Extensible { class ResponseContext extends Extensible {
bool _isOpen = true; bool _isOpen = true;
@ -31,6 +34,11 @@ class ResponseContext extends Extensible {
/// Headers that will be sent to the user. /// Headers that will be sent to the user.
final Map<String, String> headers = {}; final Map<String, String> headers = {};
/// Serializes response data into a String.
///
/// The default is conversion into JSON.
ResponseSerializer serializer = god.serialize;
/// This response's status code. /// This response's status code.
int statusCode = 200; int statusCode = 200;
@ -108,11 +116,8 @@ class ResponseContext extends Extensible {
} }
/// Serializes JSON to the response. /// Serializes JSON to the response.
void json(value) { @Deprecated('Please use `serialize` instead.')
write(god.serialize(value)); void json(value) => serialize(value, contentType: ContentType.JSON);
headers[HttpHeaders.CONTENT_TYPE] = ContentType.JSON.toString();
end();
}
/// Returns a JSONP response. /// Returns a JSONP response.
void jsonp(value, {String callbackName: "callback"}) { void jsonp(value, {String callbackName: "callback"}) {
@ -221,6 +226,19 @@ class ResponseContext extends Extensible {
end(); end();
} }
/// Serializes data to the response.
///
/// [contentType] can be either a [String], or a [ContentType].
void serialize(value, {contentType}) {
write(serializer(value));
if (contentType is String)
headers[HttpHeaders.CONTENT_TYPE] = contentType;
else if (contentType is ContentType) this.contentType = contentType;
end();
}
/// Streams a file to this response. /// Streams a file to this response.
/// ///
/// You can optionally transform the file stream with a [codec]. /// You can optionally transform the file stream with a [codec].

90
lib/src/http/server.dart
View file

@ -5,7 +5,6 @@ import 'dart:io';
import 'dart:math' show Random; import 'dart:math' show Random;
import 'dart:mirrors'; import 'dart:mirrors';
import 'package:angel_route/angel_route.dart'; import 'package:angel_route/angel_route.dart';
import 'package:json_god/json_god.dart' as god;
import 'angel_base.dart'; import 'angel_base.dart';
import 'angel_http_exception.dart'; import 'angel_http_exception.dart';
import 'controller.dart'; import 'controller.dart';
@ -41,9 +40,10 @@ class Angel extends AngelBase {
final List<Angel> _children = []; final List<Angel> _children = [];
Angel _parent; Angel _parent;
final Random _rand = new Random.secure(); final Random _rand = new Random.secure();
ServerGenerator _serverGenerator = HttpServer.bind; ServerGenerator _serverGenerator = HttpServer.bind;
final Map<dynamic, InjectionRequest> _preContained = {};
/// Fired after a request is processed. Always runs. /// Fired after a request is processed. Always runs.
Stream<HttpRequest> get afterProcessed => _afterProcessed.stream; Stream<HttpRequest> get afterProcessed => _afterProcessed.stream;
@ -82,9 +82,11 @@ class Angel extends AngelBase {
res.statusCode = e.statusCode; res.statusCode = e.statusCode;
res.write("<!DOCTYPE html><html><head><title>${e.message}</title>"); res.write("<!DOCTYPE html><html><head><title>${e.message}</title>");
res.write("</head><body><h1>${e.message}</h1><ul>"); res.write("</head><body><h1>${e.message}</h1><ul>");
for (String error in e.errors) { for (String error in e.errors) {
res.write("<li>$error</li>"); res.write("<li>$error</li>");
} }
res.write("</ul></body></html>"); res.write("</ul></body></html>");
res.end(); res.end();
}; };
@ -145,7 +147,7 @@ class Angel extends AngelBase {
if (result is bool) if (result is bool)
return result == true; return result == true;
else if (result != null) { else if (result != null) {
res.json(result); res.serialize(result);
return false; return false;
} else } else
return res.isOpen; return res.isOpen;
@ -161,7 +163,7 @@ class Angel extends AngelBase {
if (result is bool) if (result is bool)
return result == true; return result == true;
else if (result != null) { else if (result != null) {
res.json(result); res.serialize(result);
return false; return false;
} else } else
return true; return true;
@ -172,7 +174,7 @@ class Angel extends AngelBase {
if (result is bool) if (result is bool)
return result == true; return result == true;
else if (result != null) { else if (result != null) {
res.json(result); res.serialize(result);
return false; return false;
} else } else
return true; return true;
@ -182,9 +184,7 @@ class Angel extends AngelBase {
return await executeHandler(requestMiddleware[handler], req, res); return await executeHandler(requestMiddleware[handler], req, res);
} }
// res.willCloseItself = true; res.serialize(handler);
res.write(god.serialize(handler));
// await res.io.close();
return false; return false;
} }
@ -235,11 +235,13 @@ class Angel extends AngelBase {
// Special handling for AngelHttpExceptions :) // Special handling for AngelHttpExceptions :)
try { try {
res.statusCode = e.statusCode; res.statusCode = e.statusCode;
String accept = request.headers.value(HttpHeaders.ACCEPT); List<String> accept =
if (accept == "*/*" || request.headers[HttpHeaders.ACCEPT] ?? ['*/*'];
if (accept.isEmpty ||
accept.contains('*/*') ||
accept.contains(ContentType.JSON.mimeType) || accept.contains(ContentType.JSON.mimeType) ||
accept.contains("application/javascript")) { accept.contains("application/javascript")) {
res.json(e.toMap()); res.serialize(e.toMap());
} else { } else {
await _errorHandler(e, req, res); await _errorHandler(e, req, res);
} }
@ -282,45 +284,45 @@ class Angel extends AngelBase {
} }
} }
// Run a function after injecting from service container /// Run a function after injecting from service container.
Future runContained(Function handler, RequestContext req, ResponseContext res, /// If this function has been reflected before, then
{Map<String, dynamic> namedParameters}) async { /// the execution will be faster, as the injection requirements were stored beforehand.
Future runContained(
Function handler, RequestContext req, ResponseContext res) {
if (_preContained.containsKey(handler)) {
return handleContained(handler, _preContained[handler])(req, res);
}
return runReflected(handler, req, res);
}
/// Runs with DI, and *always* reflects. Prefer [runContained].
Future runReflected(
Function handler, RequestContext req, ResponseContext res) async {
ClosureMirror closureMirror = reflect(handler); ClosureMirror closureMirror = reflect(handler);
List args = []; var injection = new InjectionRequest();
for (ParameterMirror parameter in closureMirror.function.parameters) { // Load parameters
if (parameter.type.reflectedType == RequestContext) for (var parameter in closureMirror.function.parameters) {
args.add(req); var name = MirrorSystem.getName(parameter.simpleName);
else if (parameter.type.reflectedType == ResponseContext) var type = parameter.type.reflectedType;
args.add(res);
else { if (type == RequestContext || type == ResponseContext) {
// First, search to see if we can map this to a type injection.required.add(type);
if (req.injections.containsKey(parameter.type.reflectedType)) { } else if (name == 'req') {
args.add(req.injections[parameter.type.reflectedType]); injection.required.add(RequestContext);
continue; } else if (name == 'res') {
injection.required.add(ResponseContext);
} else if (type == dynamic) {
injection.required.add(name);
} else { } else {
String name = MirrorSystem.getName(parameter.simpleName); injection.required.add([name, type]);
if (req.params.containsKey(name))
args.add(req.params[name]);
else if (name == "req")
args.add(req);
else if (name == "res")
args.add(res);
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 {
throw new Exception(
"Cannot resolve parameter '$name' within handler.");
}
}
} }
} }
return await closureMirror.apply(args).reflectee; _preContained[handler] = injection;
return handleContained(handler, injection);
// return await closureMirror.apply(args).reflectee;
} }
/// Applies an [AngelConfigurer] to this instance. /// Applies an [AngelConfigurer] to this instance.

2
pubspec.yaml
View file

@ -1,5 +1,5 @@
name: angel_framework name: angel_framework
version: 1.0.0-dev.40 version: 1.0.0-dev.41
description: Core libraries for the Angel framework. description: Core libraries for the Angel framework.
author: Tobe O <thosakwe@gmail.com> author: Tobe O <thosakwe@gmail.com>
homepage: https://github.com/angel-dart/angel_framework homepage: https://github.com/angel-dart/angel_framework