157 lines
5.1 KiB
Dart
157 lines
5.1 KiB
Dart
import 'dart:typed_data';
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import 'package:json_annotation/json_annotation.dart';
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import 'package:networks_sdk/networks_sdk.dart';
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import 'package:im_app/core/foundation/api_paths.dart';
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part 'upload_file_request.g.dart';
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/// # /upload/file — 文件上传（Upload 请求示例）
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///
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/// 演示两种上传模式：
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///
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/// ## 模式 A: FormData 上传到自有后端
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/// 适用于后端直接接收文件的场景。
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/// 使用 [UploadFileRequest] — path 为相对路径，SDK 自动拼 baseURL。
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///
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/// ## 模式 B: 二进制上传到 S3 presigned URL
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/// 适用于先向后端获取 presigned URL，再直接上传到 S3 的场景。
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/// 使用 [S3UploadRequest] — path 为完整 URL，override decodeResponse。
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///
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/// ## Upload 与普通请求的区别
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///
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/// | 普通请求 | Upload 请求 |
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/// |---------|-----------|
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/// | `toJson()` → JSON body | `uploadData` → FormData / Uint8List |
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/// | `requestType: request` | `requestType: upload` |
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/// | `parameters` 有值 | `parameters` 返回 null |
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/// | 标准 `{ code, msg, data }` 响应 | 可能需要 override `decodeResponse` |
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// ─────────────────────────────────────────────
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// Response DTO
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// ─────────────────────────────────────────────
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/// 文件上传接口的业务响应数据（对应服务端 `data` 字段）。纯 Dart 类，无需任何注解。
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class UploadResult {
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final String url;
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@JsonKey(name: 'file_id')
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final String fileId;
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const UploadResult({required this.url, required this.fileId});
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}
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// ═════════════════════════════════════════════
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// 模式 A: FormData 上传到自有后端
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// ═════════════════════════════════════════════
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/// FormData 上传请求
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///
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/// 上传到自有后端 `/upload/file`，响应为标准 `{ code, message, data }` 格式。
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/// 无需 override `decodeResponse`。
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@ApiRequest(
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path: ApiPaths.uploadFile,
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method: HttpMethod.post,
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responseType: UploadResult,
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requestType: ApiRequestType.upload,
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)
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class UploadFileRequest extends ApiRequestable<UploadResult>
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with _$UploadFileRequestApi {
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final String filePath;
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final String? fileName;
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UploadFileRequest({required this.filePath, this.fileName});
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@override
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Map<String, dynamic> toJson() => {};
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/// FormData — SDK 通过 uploadData 获取上传数据
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@override
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Object? get uploadData {
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return FormData.fromMap({
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'file': MultipartFile.fromFileSync(filePath, filename: fileName),
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});
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}
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}
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// ═════════════════════════════════════════════
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// 模式 B: 二进制上传到 S3 presigned URL
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// ═════════════════════════════════════════════
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/// S3 presigned URL 上传响应
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class S3UploadResponse {
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final bool success;
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final String? message;
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const S3UploadResponse({this.success = true, this.message});
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}
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/// S3 presigned URL 上传请求
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///
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/// 特点：
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/// - path 为完整的 presigned URL（SDK 检测到 http 开头不拼 baseURL）
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/// - uploadData 为 Uint8List 二进制数据
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/// - 自定义 headers（Content-Type: application/octet-stream）
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/// - override decodeResponse — S3 返回 204 No Content 或 XML，不是标准响应格式
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class S3UploadRequest extends ApiRequestable<S3UploadResponse> {
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final Uint8List data;
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final String presignedURL;
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S3UploadRequest({required this.data, required this.presignedURL});
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@override
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String get path => presignedURL;
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@override
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HttpMethod get method => HttpMethod.put;
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@override
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ApiRequestType get requestType => ApiRequestType.upload;
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@override
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Map<String, String>? get customHeaders => {
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'Content-Type': 'application/octet-stream',
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};
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@override
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Map<String, dynamic> toJson() => {};
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/// 二进制数据
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@override
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Object? get uploadData => data;
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/// S3 响应不走标准 { code, message, data } 格式，需要自定义解码
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///
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/// 可能的响应：
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/// - 204 No Content（空 body）→ 成功
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/// - 200 + XML body → 成功
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/// - 200 + JSON body → 尝试解码
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@override
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S3UploadResponse? decodeResponse(Response response) {
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// 空响应或 2xx 状态码 → 成功
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if (response.data == null ||
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(response.data is List && (response.data as List).isEmpty)) {
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return const S3UploadResponse(success: true);
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}
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// JSON 响应 → 尝试解码
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if (response.data is Map<String, dynamic>) {
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final json = response.data as Map<String, dynamic>;
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return S3UploadResponse(
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success: true,
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message: json['message'] as String?,
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);
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}
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// 2xx 状态码 → 成功
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if (response.statusCode != null &&
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response.statusCode! >= 200 &&
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response.statusCode! < 300) {
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return const S3UploadResponse(success: true);
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}
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return const S3UploadResponse(success: true);
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}
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}
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