Add Resource package.

test/loader_http_test.dart

+// Copyright (c) 2015, 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.
+
+import "dart:async";
+import "dart:convert";
+import "dart:io";
+
+import "package:resource/resource.dart";
+import "package:test/test.dart";
+
+const content = "Rødgrød med fløde";
+
+main() {
+  var server;
+  var uri;
+  setUp(() async {
+    server = await HttpServer.bind(InternetAddress.LOOPBACK_IP_V4, 0);
+    int port = server.port;
+    uri = Uri.parse("http://localhost:$port/default.html");
+    server.forEach((HttpRequest request) {
+      var accept = request.headers[HttpHeaders.ACCEPT];
+      var encodings = request.headers[HttpHeaders.ACCEPT_CHARSET];
+      var encoding = parseAcceptCharset(encodings);
+      request.response.headers.contentType =
+          new ContentType("text", "plain", charset: encoding.name);
+      request.response..write(content)
+                      ..close();
+    }).catchError(print);
+  });
+
+  test("Default encoding", () async {
+    var loader = ResourceLoader.defaultLoader;
+    String string = await loader.readAsString(uri);
+    expect(string, content);
+  });
+
+  test("Latin-1 encoding", () async {
+    var loader = ResourceLoader.defaultLoader;
+    String string = await loader.readAsString(uri, encoding: LATIN1);
+    expect(string, content);
+  });
+
+  test("UTF-8 encoding", () async {
+    var loader = ResourceLoader.defaultLoader;
+    String string = await loader.readAsString(uri, encoding: UTF8);
+    expect(string, content);
+  });
+
+  test("bytes", () async {
+    var loader = ResourceLoader.defaultLoader;
+    List<int> bytes = await loader.readAsBytes(uri);  // Sender uses Latin-1.
+    expect(bytes, content.codeUnits);
+  });
+
+  test("byte stream", () async {
+    var loader = ResourceLoader.defaultLoader;
+    Stream<int> bytes = loader.openRead(uri);  // Sender uses Latin-1.
+    var buffer = [];
+    await bytes.forEach(buffer.addAll);
+    expect(buffer, content.codeUnits);
+  });
+
+  tearDown(() {
+    server.close();
+    server = null;
+  });
+}
+
+
+Encoding parseAcceptCharset(List<String> headers) {
+  var encoding = LATIN1;
+  if (headers != null) {
+    var weight = 0.0;
+    var pattern = new RegExp(r"([\w-]+)(;\s*q=[\d.]+)?");
+    for (var acceptCharset in headers) {
+      for (var match in pattern.allMatches(acceptCharset)) {
+        var e = Encoding.getByName(match[1]);
+        if (e == null) continue;
+        var w = 1.0;
+        if (match[2] != null) {
+          w = double.parse(match[2]);
+        }
+        if (w > weight) {
+          weight = w;
+          encoding = e;
+        }
+      }
+    }
+  }
+  return encoding;
+}