Support devFS writes via HTTP PUT

runtime/observatory/tests/service/dev_fs_http_put_test.dart

+// Copyright (c) 2016, 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.
+// VMOptions=--error_on_bad_type --error_on_bad_override
+
+import 'dart:async';
+import 'dart:convert';
+import 'dart:io';
+import 'package:observatory/service_io.dart';
+import 'package:unittest/unittest.dart';
+import 'test_helper.dart';
+
+Future<String> readResponse(HttpClientResponse response) {
+  var completer = new Completer();
+  var contents = new StringBuffer();
+  response.transform(UTF8.decoder).listen((String data) {
+    contents.write(data);
+  }, onDone: () => completer.complete(contents.toString()));
+  return completer.future;
+}
+
+
+var tests = [
+  // Write a file with the ? character in the filename.
+  (VM vm) async {
+    var fsId = 'test';
+    var filePath = '/foo/bar.dat';
+    var fileContents = [0, 1, 2, 3, 4, 5, 6, 255];
+    var fileContentsBase64 = BASE64.encode(fileContents);
+
+    var result;
+    // Create DevFS.
+    result = await vm.invokeRpcNoUpgrade('_createDevFS', { 'fsName': fsId });
+    expect(result['type'], equals('FileSystem'));
+    expect(result['name'], equals(fsId));
+    expect(result['uri'], new isInstanceOf<String>());
+
+    // Write the file by issuing an HTTP PUT.
+    HttpClient client = new HttpClient();
+    HttpClientRequest request =
+        await client.putUrl(Uri.parse(serviceHttpAddress));
+    request.headers.add('dev_fs_name', fsId);
+    request.headers.add('dev_fs_path', filePath);
+    request.add(GZIP.encode([9]));
+    HttpClientResponse response = await request.close();
+    String responseBody = await readResponse(response);
+    result = JSON.decode(responseBody);
+    expect(result['result']['type'], equals('Success'));
+
+    // Trigger an error by issuing an HTTP PUT.
+    request = await client.putUrl(Uri.parse(serviceHttpAddress));
+    request.headers.add('dev_fs_name', fsId);
+    // omit the 'dev_fs_path' parameter.
+    request.write(GZIP.encode(fileContents));
+    response = await request.close();
+    responseBody = await readResponse(response);
+    result = JSON.decode(responseBody);
+    Map error = result['error']['data'];
+    expect(error, isNotNull);
+    expect(error['details'].contains("expects the 'path' parameter"), isTrue);
+
+    // Write the file again but this time with the true file contents.
+    client = new HttpClient();
+    request =
+        await client.putUrl(Uri.parse(serviceHttpAddress));
+    request.headers.add('dev_fs_name', fsId);
+    request.headers.add('dev_fs_path', filePath);
+    request.add(GZIP.encode(fileContents));
+    response = await request.close();
+    responseBody = await readResponse(response);
+    result = JSON.decode(responseBody);
+    expect(result['result']['type'], equals('Success'));
+
+    // Close the HTTP client.
+    client.close();
+
+    // Read the file back.
+    result = await vm.invokeRpcNoUpgrade('_readDevFSFile', {
+        'fsName': fsId,
+        'path': filePath,
+    });
+    expect(result['type'], equals('FSFile'));
+    expect(result['fileContents'], equals(fileContentsBase64));
+
+    // List all the files in the file system.
+    result = await vm.invokeRpcNoUpgrade('_listDevFSFiles', {
+        'fsName': fsId,
+    });
+    expect(result['type'], equals('FSFileList'));
+    expect(result['files'].length, equals(1));
+    expect(result['files'][0]['name'], equals(filePath));
+
+    // Delete DevFS.
+    result = await vm.invokeRpcNoUpgrade('_deleteDevFS', {
+        'fsName': fsId,
+    });
+    expect(result['type'], equals('Success'));
+  },
+];
+
+main(args) async => runVMTests(args, tests);