Start pulling pub from its own repo.

sdk/lib/_internal/pub/lib/src/barback/web_socket_api.dart

Index: sdk/lib/_internal/pub/lib/src/barback/web_socket_api.dart
diff --git a/sdk/lib/_internal/pub/lib/src/barback/web_socket_api.dart b/sdk/lib/_internal/pub/lib/src/barback/web_socket_api.dart
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@@ -1,309 +0,0 @@
-// Copyright (c) 2014, 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.
-
-library pub.barback.web_socket_api;
-
-import 'dart:async';
-import 'dart:io';
-
-import 'package:http_parser/http_parser.dart';
-import 'package:path/path.dart' as path;
-import 'package:json_rpc_2/json_rpc_2.dart' as json_rpc;
-
-import '../exit_codes.dart' as exit_codes;
-import '../io.dart';
-import '../log.dart' as log;
-import '../utils.dart';
-import 'asset_environment.dart';
-
-/// Implements the [WebSocket] API for communicating with a running pub serve
-/// process, mainly for use by the Editor.
-///
-/// This is a [JSON-RPC 2.0](http://www.jsonrpc.org/specification) server. Its
-/// methods are described in the method-level documentation below.
-class WebSocketApi {
-  final AssetEnvironment _environment;
-  final json_rpc.Server _server;
-
-  /// Whether the application should exit when this connection closes.
-  bool _exitOnClose = false;
-
-  WebSocketApi(CompatibleWebSocket socket, this._environment)
-      : _server = new json_rpc.Server(socket) {
-    _server.registerMethod("urlToAssetId", _urlToAssetId);
-    _server.registerMethod("pathToUrls", _pathToUrls);
-    _server.registerMethod("serveDirectory", _serveDirectory);
-    _server.registerMethod("unserveDirectory", _unserveDirectory);
-
-    /// Tells the server to exit as soon as this WebSocket connection is closed.
-    ///
-    /// This takes no arguments and returns no results. It can safely be called
-    /// as a JSON-RPC notification.
-    _server.registerMethod("exitOnClose", () {
-      _exitOnClose = true;
-    });
-  }
-
-  /// Listens on the socket.
-  ///
-  /// Returns a future that completes when the socket has closed. It will
-  /// complete with an error if the socket had an error, otherwise it will
-  /// complete to `null`.
-  Future listen() {
-    return _server.listen().then((_) {
-      if (!_exitOnClose) return;
-      log.message("WebSocket connection closed, terminating.");
-      flushThenExit(exit_codes.SUCCESS);
-    });
-  }
-
-  /// Given a URL to an asset that is served by pub, returns the ID of the
-  /// asset that would be accessed by that URL.
-  ///
-  /// The method name is "urlToAssetId" and it takes a "url" parameter for the
-  /// URL being mapped:
-  ///
-  ///     "params": {
-  ///       "url": "http://localhost:8080/index.html"
-  ///     }
-  ///
-  /// If successful, it returns a map containing the asset ID's package and
-  /// path:
-  ///
-  ///     "result": {
-  ///       "package": "myapp",
-  ///       "path": "web/index.html"
-  ///     }
-  ///
-  /// The "path" key in the result is a URL path that's relative to the root
-  /// directory of the package identified by "package". The location of this
-  /// package may vary depending on which source it was installed from.
-  ///
-  /// An optional "line" key may be provided whose value must be an integer. If
-  /// given, the result will also include a "line" key that maps the line in
-  /// the served final file back to the corresponding source line in the asset
-  /// that was used to generate that file.
-  ///
-  /// Examples (where "myapp" is the root package and pub serve is being run
-  /// normally with "web" bound to port 8080 and "test" to 8081):
-  ///
-  ///     http://localhost:8080/index.html    -> myapp|web/index.html
-  ///     http://localhost:8081/sub/main.dart -> myapp|test/sub/main.dart
-  ///
-  /// If the URL is not a domain being served by pub, this returns an error:
-  ///
-  ///     http://localhost:1234/index.html    -> NOT_SERVED error
-  ///
-  /// This does *not* currently support the implicit index.html behavior that
-  /// pub serve provides for user-friendliness:
-  ///
-  ///     http://localhost:1234 -> NOT_SERVED error
-  ///
-  /// This does *not* currently check to ensure the asset actually exists. It
-  /// only maps what the corresponding asset *should* be for that URL.
-  Future<Map> _urlToAssetId(json_rpc.Parameters params) {
-    var url = params["url"].asUri;
-
-    // If a line number was given, map it to the output line.
-    var line = params["line"].asIntOr(null);
-
-    return _environment.getAssetIdForUrl(url).then((id) {
-      if (id == null) {
-        throw new json_rpc.RpcException(_Error.NOT_SERVED,
-            '"${url.host}:${url.port}" is not being served by pub.');
-      }
-
-      // TODO(rnystrom): When this is hooked up to actually talk to barback to
-      // see if assets exist, consider supporting implicit index.html at that
-      // point.
-
-      var result = {"package": id.package, "path": id.path};
-
-      // Map the line.
-      // TODO(rnystrom): Right now, source maps are not supported and it just
-      // passes through the original line. This lets the editor start using
-      // this API before we've fully implemented it. See #12339 and #16061.
-      if (line != null) result["line"] = line;
-
-      return result;
-    });
-  }
-
-  /// Given a path on the filesystem, returns the URLs served by pub that can be
-  /// used to access asset found at that path.
-  ///
-  /// The method name is "pathToUrls" and it takes a "path" key (a native OS
-  /// path which may be absolute or relative to the root directory of the
-  /// entrypoint package) for the path being mapped:
-  ///
-  ///     "params": {
-  ///       "path": "web/index.html"
-  ///     }
-  ///
-  /// If successful, it returns a map containing the list of URLs that can be
-  /// used to access that asset.
-  ///
-  ///     "result": {
-  ///       "urls": ["http://localhost:8080/index.html"]
-  ///     }
-  ///
-  /// The "path" key may refer to a path in another package, either by referring
-  /// to its location within the top-level "packages" directory or by referring
-  /// to its location on disk. Only the "lib" directory is visible in other
-  /// packages:
-  ///
-  ///     "params": {
-  ///       "path": "packages/http/http.dart"
-  ///     }
-  ///
-  /// Assets in the "lib" directory will usually have one URL for each server:
-  ///
-  ///     "result": {
-  ///       "urls": [
-  ///         "http://localhost:8080/packages/http/http.dart",
-  ///         "http://localhost:8081/packages/http/http.dart"
-  ///       ]
-  ///     }
-  ///
-  /// An optional "line" key may be provided whose value must be an integer. If
-  /// given, the result will also include a "line" key that maps the line in
-  /// the source file to the corresponding output line in the resulting asset
-  /// served at the URL.
-  ///
-  /// Examples (where "myapp" is the root package and pub serve is being run
-  /// normally with "web" bound to port 8080 and "test" to 8081):
-  ///
-  ///     web/index.html      -> http://localhost:8080/index.html
-  ///     test/sub/main.dart  -> http://localhost:8081/sub/main.dart
-  ///
-  /// If the asset is not in a directory being served by pub, returns an error:
-  ///
-  ///     example/index.html  -> NOT_SERVED error
-  Future<Map> _pathToUrls(json_rpc.Parameters params) {
-    var assetPath = params["path"].asString;
-    var line = params["line"].asIntOr(null);
-
-    return _environment.getUrlsForAssetPath(assetPath).then((urls) {
-      if (urls.isEmpty) {
-        throw new json_rpc.RpcException(_Error.NOT_SERVED,
-            'Asset path "$assetPath" is not currently being served.');
-      }
-
-      var result = {"urls": urls.map((url) => url.toString()).toList()};
-
-      // Map the line.
-      // TODO(rnystrom): Right now, source maps are not supported and it just
-      // passes through the original line. This lets the editor start using
-      // this API before we've fully implemented it. See #12339 and #16061.
-      if (line != null) result["line"] = line;
-
-      return result;
-    });
-  }
-
-  /// Given a relative directory path within the entrypoint package, binds a
-  /// new port to serve from that path and returns its URL.
-  ///
-  /// The method name is "serveDirectory" and it takes a "path" key (a native
-  /// OS path relative to the root of the entrypoint package) for the directory
-  /// being served:
-  ///
-  ///     "params": {
-  ///       "path": "example/awesome"
-  ///     }
-  ///
-  /// If successful, it returns a map containing the URL that can be used to
-  /// access the directory.
-  ///
-  ///     "result": {
-  ///       "url": "http://localhost:8083"
-  ///     }
-  ///
-  /// If the directory is already being served, returns the previous URL.
-  Future<Map> _serveDirectory(json_rpc.Parameters params) {
-    var rootDirectory = _validateRelativePath(params, "path");
-    return _environment.serveDirectory(rootDirectory).then((server) {
-      return {
-        "url": server.url.toString()
-      };
-    }).catchError((error) {
-      if (error is! OverlappingSourceDirectoryException) throw error;
-
-      var dir = pluralize("directory", error.overlappingDirectories.length,
-          plural: "directories");
-      var overlapping = toSentence(error.overlappingDirectories.map(
-          (dir) => '"$dir"'));
-      print("data: ${error.overlappingDirectories}");
-      throw new json_rpc.RpcException(_Error.OVERLAPPING,
-          'Path "$rootDirectory" overlaps already served $dir $overlapping.',
-          data: {
-            "directories": error.overlappingDirectories
-          });
-    });
-  }
-
-  /// Given a relative directory path within the entrypoint package, unbinds
-  /// the server previously bound to that directory and returns its (now
-  /// unreachable) URL.
-  ///
-  /// The method name is "unserveDirectory" and it takes a "path" key (a
-  /// native OS path relative to the root of the entrypoint package) for the
-  /// directory being unserved:
-  ///
-  ///     "params": {
-  ///       "path": "example/awesome"
-  ///     }
-  ///
-  /// If successful, it returns a map containing the URL that used to be used
-  /// to access the directory.
-  ///
-  ///     "result": {
-  ///       "url": "http://localhost:8083"
-  ///     }
-  ///
-  /// If no server is bound to that directory, it returns a `NOT_SERVED` error.
-  Future<Map> _unserveDirectory(json_rpc.Parameters params) {
-    var rootDirectory = _validateRelativePath(params, "path");
-    return _environment.unserveDirectory(rootDirectory).then((url) {
-      if (url == null) {
-        throw new json_rpc.RpcException(_Error.NOT_SERVED,
-            'Directory "$rootDirectory" is not bound to a server.');
-      }
-
-      return {"url": url.toString()};
-    });
-  }
-
-  /// Validates that [command] has a field named [key] whose value is a string
-  /// containing a relative path that doesn't reach out of the entrypoint
-  /// package's root directory.
-  ///
-  /// Returns the path if found, or throws a [_WebSocketException] if
-  /// validation failed.
-  String _validateRelativePath(json_rpc.Parameters params, String key) {
-    var pathString = params[key].asString;
-
-    if (!path.isRelative(pathString)) {
-      throw new json_rpc.RpcException.invalidParams(
-          '"$key" must be a relative path. Got "$pathString".');
-    }
-
-    if (!path.isWithin(".", pathString)) {
-      throw new json_rpc.RpcException.invalidParams(
-          '"$key" cannot reach out of its containing directory. '
-          'Got "$pathString".');
-    }
-
-    return pathString;
-  }
-}
-
-/// The pub-specific JSON RPC error codes.
-class _Error {
-  /// The specified directory is not being served.
-  static const NOT_SERVED = 1;
-
-  /// The specified directory overlaps one or more ones already being served.
-  static const OVERLAPPING = 2;
-}