| // 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. |
| |
| import 'dart:convert'; |
| import 'dart:typed_data'; |
| |
| import 'base_request.dart'; |
| import 'byte_stream.dart'; |
| import 'client.dart'; |
| import 'exception.dart'; |
| import 'request.dart'; |
| import 'response.dart'; |
| import 'streamed_response.dart'; |
| |
| /// The abstract base class for an HTTP client. |
| /// |
| /// This is a mixin-style class; subclasses only need to implement [send] and |
| /// maybe [close], and then they get various convenience methods for free. |
| abstract class BaseClient implements Client { |
| @override |
| Future<Response> head(Uri url, {Map<String, String>? headers}) => |
| _sendUnstreamed('HEAD', url, headers); |
| |
| @override |
| Future<Response> get(Uri url, {Map<String, String>? headers}) => |
| _sendUnstreamed('GET', url, headers); |
| |
| @override |
| Future<Response> post(Uri url, |
| {Map<String, String>? headers, Object? body, Encoding? encoding}) => |
| _sendUnstreamed('POST', url, headers, body, encoding); |
| |
| @override |
| Future<Response> put(Uri url, |
| {Map<String, String>? headers, Object? body, Encoding? encoding}) => |
| _sendUnstreamed('PUT', url, headers, body, encoding); |
| |
| @override |
| Future<Response> patch(Uri url, |
| {Map<String, String>? headers, Object? body, Encoding? encoding}) => |
| _sendUnstreamed('PATCH', url, headers, body, encoding); |
| |
| @override |
| Future<Response> delete(Uri url, |
| {Map<String, String>? headers, Object? body, Encoding? encoding}) => |
| _sendUnstreamed('DELETE', url, headers, body, encoding); |
| |
| @override |
| Future<String> read(Uri url, {Map<String, String>? headers}) async { |
| final response = await get(url, headers: headers); |
| _checkResponseSuccess(url, response); |
| return response.body; |
| } |
| |
| @override |
| Future<Uint8List> readBytes(Uri url, {Map<String, String>? headers}) async { |
| final response = await get(url, headers: headers); |
| _checkResponseSuccess(url, response); |
| return response.bodyBytes; |
| } |
| |
| /// Sends an HTTP request and asynchronously returns the response. |
| /// |
| /// Implementers should call [BaseRequest.finalize] to get the body of the |
| /// request as a [ByteStream]. They shouldn't make any assumptions about the |
| /// state of the stream; it could have data written to it asynchronously at a |
| /// later point, or it could already be closed when it's returned. Any |
| /// internal HTTP errors should be wrapped as [ClientException]s. |
| @override |
| Future<StreamedResponse> send(BaseRequest request); |
| |
| /// Sends a non-streaming [Request] and returns a non-streaming [Response]. |
| Future<Response> _sendUnstreamed( |
| String method, Uri url, Map<String, String>? headers, |
| [body, Encoding? encoding]) async { |
| var request = Request(method, url); |
| |
| if (headers != null) request.headers.addAll(headers); |
| if (encoding != null) request.encoding = encoding; |
| if (body != null) { |
| if (body is String) { |
| request.body = body; |
| } else if (body is List) { |
| request.bodyBytes = body.cast<int>(); |
| } else if (body is Map) { |
| request.bodyFields = body.cast<String, String>(); |
| } else { |
| throw ArgumentError('Invalid request body "$body".'); |
| } |
| } |
| |
| return Response.fromStream(await send(request)); |
| } |
| |
| /// Throws an error if [response] is not successful. |
| void _checkResponseSuccess(Uri url, Response response) { |
| if (response.statusCode < 400) return; |
| var message = 'Request to $url failed with status ${response.statusCode}'; |
| if (response.reasonPhrase != null) { |
| message = '$message: ${response.reasonPhrase}'; |
| } |
| throw ClientException('$message.', url); |
| } |
| |
| @override |
| void close() {} |
| } |