Initial commit: watch-together phases 0-4 + presence hardening, internet-tested

tool/range_logger.dart

@@ -0,0 +1,44 @@
+import 'dart:io';
+
+import 'package:args/args.dart';
+import 'package:relic/relic.dart';
+import 'package:sync_relay_server/server.dart';
+
+Future<void> main(List<String> args) async {
+  final parser = ArgParser()
+    ..addOption('file', abbr: 'f', help: 'media file to serve')
+    ..addOption('port', abbr: 'p', defaultsTo: '8080')
+    ..addOption('route', defaultsTo: '/m/file');
+  final parsed = parser.parse(args);
+  final fileArg = parsed['file'] as String?;
+  if (fileArg == null) {
+    stderr.writeln('usage: range_logger.dart --file <path> [--port 8080]');
+    exit(2);
+  }
+  final file = File(fileArg);
+  if (!await file.exists()) {
+    stderr.writeln('file not found: $fileArg');
+    exit(2);
+  }
+  final size = await file.length();
+  final app = RelicApp();
+  mountMediaRoute(app, file,
+      route: parsed['route'] as String,
+      onLog: (log) {
+        // ignore: avoid_print
+        print(log);
+      });
+  app.fallback = (final req) {
+    // ignore: avoid_print
+    print('${req.method.name} ${req.url} -> 404');
+    return Response.notFound(body: Body.fromString('not found'));
+  };
+  final server = await app.serve(
+    address: InternetAddress.anyIPv4,
+    port: int.tryParse('${parsed['port']}') ?? 8080,
+  );
+  // ignore: avoid_print
+  print('SERVING file=$fileArg size=$size on :${server.port}${parsed['route']}');
+  await ProcessSignal.sigint.watch().first;
+  await app.close();
+}