Create java http package (#971)

pkgs/java_http/CHANGELOG.md

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+## 0.0.1
+
+- Initial development release.

pkgs/java_http/LICENSE

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+Copyright 2023, the Dart project authors. 
+
+Redistribution and use in source and binary forms, with or without
+modification, are permitted provided that the following conditions are
+met:
+
+    * Redistributions of source code must retain the above copyright
+      notice, this list of conditions and the following disclaimer.
+    * Redistributions in binary form must reproduce the above
+      copyright notice, this list of conditions and the following
+      disclaimer in the documentation and/or other materials provided
+      with the distribution.
+    * Neither the name of Google LLC nor the names of its
+      contributors may be used to endorse or promote products derived
+      from this software without specific prior written permission.
+
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

pkgs/java_http/README.md

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+A Dart package for making HTTP requests using native Java APIs
+([java.net.HttpURLConnection](https://docs.oracle.com/javase/8/docs/api/java/net/HttpURLConnection.html)).
+
+Using native Java APIs has several advantages on Android:
+
+ * Support for `KeyStore` `PrivateKey`s ([#50669](https://github.com/dart-lang/sdk/issues/50669))
+ * Support for the system proxy ([#50434](https://github.com/dart-lang/sdk/issues/50434))
+ * Support for user-installed certificates ([#50435](https://github.com/dart-lang/sdk/issues/50435))
+
+## Status: Experimental
+
+**NOTE**: This package is currently experimental and published under the
+[labs.dart.dev](https://dart.dev/dart-team-packages) pub publisher in order to
+solicit feedback. 
+
+For packages in the labs.dart.dev publisher we generally plan to either graduate
+the package into a supported publisher (dart.dev, tools.dart.dev) after a period
+of feedback and iteration, or discontinue the package. These packages have a
+much higher expected rate of API and breaking changes.
+
+Your feedback is valuable and will help us evolve this package. 
+For general feedback and suggestions please comment in the
+[feedback issue](https://github.com/dart-lang/http/issues/764).
+For bugs, please file an issue in the 
+[bug tracker](https://github.com/dart-lang/http/issues).

pkgs/java_http/example/java_http_example.dart

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+// Copyright (c) 2023, 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.
+
+// This code was generated by the Dart create command with the package template.
+
+import 'package:java_http/java_http.dart';
+
+void main() {
+  var awesome = Awesome();
+  print('awesome: ${awesome.isAwesome}');
+}

pkgs/java_http/lib/java_http.dart

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+// Copyright (c) 2023, 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;
+
+export 'src/java_http_base.dart';

pkgs/java_http/lib/src/java_http_base.dart

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+// Copyright (c) 2023, 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.
+
+// This code was generated by the Dart create command with the package template.
+
+class Awesome {
+  bool get isAwesome => true;
+}

pkgs/java_http/pubspec.yaml

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+name: java_http
+description: A Dart package for making HTTP requests using java.net.HttpURLConnection.
+version: 0.0.1
+repository: https://github.com/dart-lang/http/tree/master/pkgs/java_http
+publish_to: none
+
+environment:
+  sdk: ^3.0.0
+
+dependencies:
+
+dev_dependencies:
+  lints: ^2.0.0
+  test: ^1.21.0

pkgs/java_http/test/java_http_test.dart

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+// Copyright (c) 2023, 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.
+
+// This code was generated by the Dart create command with the package template.
+
+import 'package:java_http/java_http.dart';
+import 'package:test/test.dart';
+
+void main() {
+  group('A group of tests', () {
+    final awesome = Awesome();
+
+    setUp(() {
+      // Additional setup goes here.
+    });
+
+    test('First Test', () {
+      expect(awesome.isAwesome, isTrue);
+    });
+  });
+}