Add appengine/gcloud/mustache dependencies.

pkg/appengine/lib/src/api_impl/remote_api_impl.dart

+// Copyright (c) 2014, the Dart project authors.  Please see the AUTHORS file
+// for details. All rights reserved. Use of this source code is governed by a
+// BSD-style license that can be found in the LICENSE file.
+
+library remote_api_impl;
+
+import 'dart:async';
+import 'dart:io';
+import 'dart:convert' show UTF8, JSON;
+
+import '../../api/errors.dart' as errors;
+import '../../api/remote_api.dart' as remote_api;
+import '../appengine_context.dart';
+
+import '../protobuf_api/rpc/rpc_service.dart';
+import '../protobuf_api/internal/remote_api.pb.dart'
+    as pb;
+
+class RemoteApiImpl extends remote_api.RemoteApi {
+  static final TEXT_CONTENT_TYPE =
+      new ContentType('text', 'plain', charset: 'utf-8');
+  static final JSON_CONTENT_TYPE =
+      new ContentType('application', 'json', charset: 'utf-8');
+  static final BINARY_CONTENT_TYPE =
+      new ContentType('application', 'octet-stream');
+
+  final RPCService _rpcService;
+  final String _ticket;
+  final AppengineContext _context;
+
+  RemoteApiImpl(this._rpcService, this._context, this._ticket);
+
+  Future handleRemoteApiRequest(HttpRequest httpRequest) {
+    if (httpRequest.method == 'GET') {
+      var rtok = httpRequest.uri.queryParameters['rtok'];
+      if (rtok == null) rtok = '0';
+      var json = {
+        'app_id' : _context.fullQualifiedApplicationId,
+        'rtok' : rtok,
+      };
+      return httpRequest.drain().then((_) {
+        var data = UTF8.encode(JSON.encode(json));
+        return _sendData(
+            httpRequest.response, HttpStatus.OK, JSON_CONTENT_TYPE, data);
+      });
+    } else if (httpRequest.method == 'POST') {
+      return httpRequest
+          .fold(new BytesBuilder(), (buffer, data) => buffer..add(data))
+          .then((BytesBuilder result) {
+        var request = new pb.Request.fromBuffer(result.takeBytes());
+        var response = new pb.Response();
+        return _rpcService.call(request.serviceName, request.method,
+                                request.request, ticket: _ticket)
+            .then((result) {
+          response.response = result;
+
+          var data = response.writeToBuffer();
+          return _sendData(
+              httpRequest.response, HttpStatus.OK, BINARY_CONTENT_TYPE, data);
+        }).catchError((error) {
+          response.applicationError = new pb.ApplicationError();
+          response.applicationError.code = error.code;
+          response.applicationError.detail = error.message;
+
+          var data = response.writeToBuffer();
+          return _sendData(
+              httpRequest.response, HttpStatus.OK, BINARY_CONTENT_TYPE, data);
+        }, test: (error) => error is RpcApplicationError)
+        .then((_) => null);
+      });
+    } else {
+      return new Future.sync(() {
+        throw new errors.ApplicationError(
+            'RemoteApi will only handle GET and POST requests.');
+      });
+    }
+  }
+
+  Future _sendData(response, statusCode, contentType, data) {
+    response.statusCode = statusCode;
+    response.headers.contentType = contentType;
+    response.headers.contentLength = data.length;
+    response.add(data);
+    return response.close();
+  }
+}