add single files, secure server, hello world

helloworld.dart

@@ -0,0 +1,22 @@
+#!/usr/local/bin/dart
+
+void main() {
+
+  var sb = new StringBuffer();
+  sb..write('Hello ')
+    ..write('world ')
+    ..write('!');
+
+  print(sb.toString());
+
+  for (int i = 0; i < 5; i++) {
+    print('Hello:  ${i}');
+  }
+
+  var arr = [];
+  for (int i = 0; i < 10; i++) {
+    arr.add(i);
+  }
+  print(arr);
+  print(arr.join(':'));
+}

secure_server/server_chain.pem

@@ -0,0 +1,19 @@
+-----BEGIN CERTIFICATE-----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+-----END CERTIFICATE-----

secure_server/server_key.pem

@@ -0,0 +1,27 @@
+-----BEGIN RSA PRIVATE KEY-----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+-----END RSA PRIVATE KEY-----

secure_server/simple_secure_server.dart

@@ -0,0 +1,23 @@
+import 'dart:io';
+
+String certificateChain = 'server_chain.pem';
+String serverKey = 'server_key.pem';
+
+Future main() async {
+  var serverContext = SecurityContext();
+  serverContext.useCertificateChain(certificateChain);
+  serverContext.usePrivateKey(serverKey, password: 'dartdart');
+
+  var server = await HttpServer.bindSecure(
+    '0.0.0.0',
+    8443,
+    serverContext,
+  );
+  print('Listening on localhost:${server.port}');
+  await for (HttpRequest request in server) {
+    print('Got request for ${request.uri.path}');
+    request.response
+      ..write('Hello, world!')
+      ..close();
+  }
+}

single_file_tests/args.dart

@@ -0,0 +1,15 @@
+import 'dart:io';
+
+void main(List<String> args) {
+  print(args);
+
+  var env = Platform.environment;
+
+
+  print(Platform.script);
+  print(Platform.numberOfProcessors);
+  print(Platform.operatingSystem);
+  print(Platform.isMacOS);
+  print(Platform.isLinux);
+  print(Platform.isWindows);
+}

single_file_tests/f.txt

@@ -0,0 +1,2 @@
+hello
+world

single_file_tests/file.dart

@@ -0,0 +1,11 @@
+import 'dart:io';
+
+main() async {
+  var f = new File('f.txt');
+  var contents = await f.readAsString();
+  var lines = await f.readAsLines();
+
+  print('Contents:' + contents);
+  print('Lines:' + lines.join('||'));
+}
+

single_file_tests/file_append.dart

@@ -0,0 +1,15 @@
+#!/usr/bin/env dart
+
+import 'dart:io';
+
+// https://juejin.im/post/5d7f4c35f265da03c50341df
+void main() async{
+  File file = new File('test.txt');
+  IOSink isk = file.openWrite(mode: FileMode.append);
+
+  isk.write('Line 1');
+  isk.writeln(', also line 1');
+  isk.writeln('Line 2');
+  await isk.close();
+  print('Done!');
+}

single_file_tests/find_in_dir.dart

@@ -0,0 +1,28 @@
+#!/usr/bin/env dart
+
+import 'dart:io';
+import 'dart:async';
+
+main() async {
+  //Stream<FileSystemEntity> entityList = Directory.systemTemp.list(recursive: true, followLinks: false);
+  Stream<FileSystemEntity> entityList = Directory.current.list(recursive: true, followLinks: false);
+
+  await for (FileSystemEntity entity in entityList) {
+    FileSystemEntityType type = await FileSystemEntity.type(entity.path);
+    String label;
+    switch (type) {
+      case FileSystemEntityType.directory:
+        label = 'D';
+        break;
+      case FileSystemEntityType.file:
+        label = 'F';
+        break;
+      case FileSystemEntityType.link:
+        label = 'L';
+        break;
+      default:
+        label = 'UNKNOWN';
+    }
+    print('$label: ${entity.path}');
+  }
+}

single_file_tests/http_client.dart

@@ -0,0 +1,15 @@
+import 'dart:io';
+import 'dart:convert';
+
+main() async {
+  var url = Uri.parse('https://hatter.ink/ip/ip.jsonp');
+  var httpClient = new HttpClient();
+  var request = await httpClient.getUrl(url);
+  print('have request');
+  var response = await request.close();
+  print('have response');
+  var data = await response.transform(utf8.decoder).toList();
+  var body = data.join('');
+  print(body);
+  httpClient.close();
+}

single_file_tests/print_env.dart

@@ -0,0 +1,10 @@
+#!/usr/bin/env dart
+
+import 'dart:io' show Platform;
+
+main() {
+  Map<String, String> envVars = Platform.environment;
+  envVars.forEach((k, v) => {
+    print('$k = $v')
+  });
+}

single_file_tests/print_file.dart

@@ -0,0 +1,13 @@
+#!/usr/bin/env dart
+
+import 'dart:io';
+
+main(List<String> args) async {
+  print("[INFO] Arguments: $args");
+  if (args.length == 0) {
+    print("No file assigned.");
+    return;
+  }
+  final contents = await new File(args[0]).readAsString();
+  print(contents);
+}

single_file_tests/random.dart

@@ -0,0 +1,7 @@
+import 'dart:math';
+
+main() {
+  final intRandom = new Random();
+  print('Int random: ${intRandom.nextInt(100)}');
+}
+

single_file_tests/run_process.dart

@@ -0,0 +1,14 @@
+#!/usr/bin/env dart
+
+import 'dart:io';
+
+main() async {
+  // run
+  var results = await Process.run('ls', ['-l']);
+  print(results.stdout);
+
+  // start
+  var process = await Process.start('ls', ['-l']);
+  var exitCode = await process.exitCode;
+  print('exit code: $exitCode');
+}

single_file_tests/showmyip.dart

@@ -0,0 +1,16 @@
+#!/usr/bin/env dart
+
+import 'dart:io';
+import 'dart:convert';
+
+main() async {
+  final url = Uri.parse('https://hatter.ink/ip/ip.jsonp');
+  final httpClient = new HttpClient();
+  httpClient.connectionTimeout = const Duration(seconds: 6);
+  final request = await httpClient.getUrl(url);
+  final response = await request.close();
+  final data = await response.transform(utf8.decoder).toList();
+  final body = data.join('');
+  print(body);
+  httpClient.close();
+}

single_file_tests/simple_server.dart

@@ -0,0 +1,22 @@
+import 'dart:io';
+
+main() async {
+  dartHandler(HttpRequest request) {
+    request.response.headers.contentType =
+        new ContentType('text', 'plain');
+    request.response.write('Dart is optionally typed');
+    request.response.close();
+  }
+
+  print('Listen at :8888');
+  var requests = await HttpServer.bind('0.0.0.0', 8888);
+  await for (var request in requests) {
+    print('Got request for ${request.uri.path}');
+    if (request.uri.path == '/languages/dart') {
+      dartHandler(request);
+    } else {
+      request.response.write('Not found');
+      request.response.close();
+    }
+  }
+}

single_file_tests/term.dart

@@ -0,0 +1,11 @@
+#!/usr/bin/env dart
+
+import 'dart:io';
+
+main() {
+  if (stdioType(stdout) == StdioType.terminal) {
+    print("Is term.");
+  } else {
+    print("Not term.");
+  }
+}