Serve html report in server mode

lib/src/server/server.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.
 
 /// Development server that compiles Dart to JS on the fly.
 library dev_compiler.src.server;
 
 import 'dart:async';
 import 'dart:convert';
 import 'dart:io';
 
 import 'package:analyzer/file_system/file_system.dart' show ResourceUriResolver;
 import 'package:analyzer/file_system/memory_file_system.dart';
 import 'package:analyzer/src/generated/engine.dart'
     show AnalysisContext, ChangeSet;
 import 'package:analyzer/src/generated/error.dart';
 import 'package:analyzer/src/generated/source.dart';
 import 'package:logging/logging.dart' show Level, Logger, LogRecord;
 import 'package:path/path.dart' as path;
 import 'package:shelf/shelf.dart' as shelf;
 import 'package:shelf/shelf_io.dart' as shelf;
 import 'package:shelf_static/shelf_static.dart' as shelf_static;
 
 import '../codegen/code_generator.dart' show CodeGenerator;
 import '../codegen/html_codegen.dart' show generateEntryHtml;
 import '../codegen/js_codegen.dart';
+import '../report/html_reporter.dart' show HtmlReporter;
 import '../analysis_context.dart';
 import '../compiler.dart' show AbstractCompiler, createErrorReporter;
 import '../info.dart'
     show AnalyzerMessage, CheckerResults, LibraryInfo, LibraryUnit;
 import '../options.dart';
 import '../report.dart';
 import '../utils.dart';
 
 import 'dependency_graph.dart';
 
@@ skipping 140 matching lines @@
       changed++;
       return _buildSource(n);
     });
     clock.stop();
     if (changed > 0) _dumpInfoIfRequested();
     var time = (clock.elapsedMilliseconds / 1000).toStringAsFixed(2);
     _log.fine("Compiled ${changed} libraries in ${time} s\n");
   }
 
   _dumpInfoIfRequested() {
-    if (!options.dumpInfo || reporter is! SummaryReporter) return;
-    var result = (reporter as SummaryReporter).result;
-    if (!options.serverMode) print(summaryToString(result));
-    var filepath = options.serverMode
-        ? path.join(outputDir, 'messages.json')
-        : options.dumpInfoFile;
-    if (filepath == null) return;
-    new File(filepath).writeAsStringSync(JSON.encode(result.toJsonMap()));
+    if (reporter is HtmlReporter) {
+      (reporter as HtmlReporter).finish(options);
+    } else {
+      if (!options.dumpInfo || reporter is! SummaryReporter) return;
+      var result = (reporter as SummaryReporter).result;
+      if (!options.serverMode) print(summaryToString(result));
+      var filepath = options.serverMode
+          ? path.join(outputDir, 'messages.json')
+          : options.dumpInfoFile;
+      if (filepath == null) return;
+      new File(filepath).writeAsStringSync(JSON.encode(result.toJsonMap()));
+    }
   }
 }
 
 class DevServer {
   final ServerCompiler compiler;
   final String outDir;
   final String host;
   final int port;
   final String _entryPath;
 
@@ skipping 97 matching lines @@
   Source resolveAbsolute(Uri uri, [Uri actualUri]) {
     var src = resolver.resolveAbsolute(uri, actualUri);
     return src.exists() ? src : null;
   }
 
   Uri restoreAbsolute(Source source) => resolver.restoreAbsolute(source);
 }
 
 final _log = new Logger('dev_compiler.src.server');
 final _earlyErrorResult = new CheckerResults(const [], true);