| // Copyright (c) 2012, 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. |
| |
| /// Helpers for dealing with HTTP. |
| library pub.http; |
| |
| import 'dart:async'; |
| import 'dart:io'; |
| import 'dart:json' as json; |
| |
| // TODO(nweiz): Make this import better. |
| import '../../pkg/http/lib/http.dart' as http; |
| import 'io.dart'; |
| import 'log.dart' as log; |
| import 'utils.dart'; |
| |
| // TODO(nweiz): make this configurable |
| /// The amount of time in milliseconds to allow HTTP requests before assuming |
| /// they've failed. |
| final HTTP_TIMEOUT = 30 * 1000; |
| |
| /// An HTTP client that transforms 40* errors and socket exceptions into more |
| /// user-friendly error messages. |
| class PubHttpClient extends http.BaseClient { |
| http.Client inner; |
| |
| PubHttpClient([http.Client inner]) |
| : this.inner = inner == null ? new http.Client() : inner; |
| |
| Future<http.StreamedResponse> send(http.BaseRequest request) { |
| // TODO(rnystrom): Log request body when it's available and plaintext, but |
| // not when it contains OAuth2 credentials. |
| |
| // TODO(nweiz): remove this when issue 4061 is fixed. |
| var stackTrace; |
| try { |
| throw null; |
| } catch (_, localStackTrace) { |
| stackTrace = localStackTrace; |
| } |
| |
| // TODO(nweiz): Ideally the timeout would extend to reading from the |
| // response input stream, but until issue 3657 is fixed that's not feasible. |
| return timeout(inner.send(request).then((streamedResponse) { |
| log.fine("Got response ${streamedResponse.statusCode} " |
| "${streamedResponse.reasonPhrase}."); |
| |
| var status = streamedResponse.statusCode; |
| // 401 responses should be handled by the OAuth2 client. It's very |
| // unlikely that they'll be returned by non-OAuth2 requests. |
| if (status < 400 || status == 401) return streamedResponse; |
| |
| return http.Response.fromStream(streamedResponse).then((response) { |
| throw new PubHttpException(response); |
| }); |
| }).catchError((asyncError) { |
| if (asyncError.error is SocketIOException && |
| asyncError.error.osError != null) { |
| if (asyncError.error.osError.errorCode == 8 || |
| asyncError.error.osError.errorCode == -2 || |
| asyncError.error.osError.errorCode == -5 || |
| asyncError.error.osError.errorCode == 11004) { |
| throw 'Could not resolve URL "${request.url.origin}".'; |
| } else if (asyncError.error.osError.errorCode == -12276) { |
| throw 'Unable to validate SSL certificate for ' |
| '"${request.url.origin}".'; |
| } |
| } |
| throw asyncError; |
| }), HTTP_TIMEOUT, 'fetching URL "${request.url}"'); |
| } |
| } |
| |
| /// The HTTP client to use for all HTTP requests. |
| final httpClient = new PubHttpClient(); |
| |
| /// Handles a successful JSON-formatted response from pub.dartlang.org. |
| /// |
| /// These responses are expected to be of the form `{"success": {"message": |
| /// "some message"}}`. If the format is correct, the message will be printed; |
| /// otherwise an error will be raised. |
| void handleJsonSuccess(http.Response response) { |
| var parsed = parseJsonResponse(response); |
| if (parsed['success'] is! Map || |
| !parsed['success'].containsKey('message') || |
| parsed['success']['message'] is! String) { |
| invalidServerResponse(response); |
| } |
| log.message(parsed['success']['message']); |
| } |
| |
| /// Handles an unsuccessful JSON-formatted response from pub.dartlang.org. |
| /// |
| /// These responses are expected to be of the form `{"error": {"message": "some |
| /// message"}}`. If the format is correct, the message will be raised as an |
| /// error; otherwise an [invalidServerResponse] error will be raised. |
| void handleJsonError(http.Response response) { |
| var errorMap = parseJsonResponse(response); |
| if (errorMap['error'] is! Map || |
| !errorMap['error'].containsKey('message') || |
| errorMap['error']['message'] is! String) { |
| invalidServerResponse(response); |
| } |
| throw errorMap['error']['message']; |
| } |
| |
| /// Parses a response body, assuming it's JSON-formatted. Throws a user-friendly |
| /// error if the response body is invalid JSON, or if it's not a map. |
| Map parseJsonResponse(http.Response response) { |
| var value; |
| try { |
| value = json.parse(response.body); |
| } catch (e) { |
| // TODO(nweiz): narrow this catch clause once issue 6775 is fixed. |
| invalidServerResponse(response); |
| } |
| if (value is! Map) invalidServerResponse(response); |
| return value; |
| } |
| |
| /// Throws an error describing an invalid response from the server. |
| void invalidServerResponse(http.Response response) { |
| throw 'Invalid server response:\n${response.body}'; |
| } |
| |
| /// Exception thrown when an HTTP operation fails. |
| class PubHttpException implements Exception { |
| final http.Response response; |
| |
| const PubHttpException(this.response); |
| |
| String toString() => 'HTTP error ${response.statusCode}: ' |
| '${response.reasonPhrase}'; |
| } |