详情里的对话框切换动画ok

2025-09-04 23:24:48 +08:00
parent 0231dcfe1a
commit 70aa3e6ab6
8 changed files with 368 additions and 41 deletions
--- a/lib/utils/stream.dart
+++ b/lib/utils/stream.dart
@@ -0,0 +1,121 @@
+import 'dart:async';
+import 'dart:convert';
+import 'dart:typed_data';
+
+import 'package:dio/dio.dart';
+import 'package:flutter_easyloading/flutter_easyloading.dart';
+import 'package:logger/logger.dart';
+
+import '../config/env.dart';
+import '../providers/app_store.dart';
+
+///封装流式请求
+class StreamUtils {
+  var logger = Logger();
+  Dio dio = Dio();
+
+  ///发送流式请求
+  /// - [url] 请求的URL
+  /// - [data] 请求的数据，默认为空
+  /// - [onCall] 可选的回调函数，用于处理每个数据块
+  /// - [onEnd] 可选的回调函数，用于处理请求结束
+  /// - [onError] 可选的回调函数，用于处理请求错误
+  Future<void> sendStream(
+    String url, {
+    Map<String, dynamic> data = const {},
+    Function(Map<String, dynamic> chunk)? onCall,
+    Function()? onEnd,
+    Function()? onError,
+  }) async {
+    String token = await AppStore.getToken();
+    Response response = await dio.post(
+      "${Config.baseUrl()}$url",
+      data: data,
+      options: Options(
+        responseType: ResponseType.stream,
+        headers: {
+          'Content-Type': 'application/json',
+          'Authorization': "Bearer $token",
+        },
+      ),
+    );
+    if (await _isValidResponse(response)) {
+      onError?.call();
+      return;
+    }
+    //数据
+    var bufferText = ""; //吐出来的内容
+
+    //处理响应
+    response.data?.stream
+        .transform(_unit8Transformer())
+        .transform(utf8.decoder)
+        .listen(
+          (chunk) {
+            List<String> chunkList = chunk.split("\n");
+            for (var element in chunkList) {
+              String streamStr = element.replaceAll("data: ", '').trim();
+              try {
+                if (streamStr.isNotEmpty) {
+                  if (streamStr == '[DONE]') {
+                    // 流结束标志，忽略不处理
+                    return;
+                  }
+                  Map<String, dynamic> dataJSON = jsonDecode(streamStr);
+                  //提取响应数据
+                  Map<String, dynamic> choices = dataJSON['choices'][0];
+                  //提取文字
+                  var word = choices['delta']['content'];
+                  //回调
+                  if (word != null) {
+                    bufferText += word;
+                  }
+                  onCall?.call({...choices, "text": bufferText});
+                }
+              } catch (e) {
+                onError?.call();
+                logger.e("流错误响应: $e");
+              }
+            }
+          },
+          onDone: () {
+            onEnd?.call();
+          },
+          onError: (error) {
+            onError?.call();
+            logger.e("流错误: $error");
+          },
+        );
+  }
+
+  /// 将Uint8List转换为List<int>
+  StreamTransformer<Uint8List, List<int>> _unit8Transformer() {
+    StreamTransformer<Uint8List, List<int>> unit8Transformer = StreamTransformer.fromHandlers(
+      handleData: (data, sink) {
+        sink.add(List<int>.from(data));
+      },
+    );
+    return unit8Transformer;
+  }
+
+  // 判断是否是正常请求
+  Future<bool> _isValidResponse(Response response) async {
+    final contentType = response.headers.value('content-type') ?? '';
+    if (contentType.contains('application/json')) {
+      final data = response.data;
+      if (data is ResponseBody) {
+        // 把流里的所有字节收集起来
+        final bytes = await data.stream.fold<List<int>>(
+          [],
+          (previous, element) => previous..addAll(element),
+        );
+        var res = jsonDecode(utf8.decode(bytes));
+        if (res['code'] == 0) {
+          EasyLoading.showToast(res['message']);
+        }
+      }
+      return true;
+    }
+    return false;
+  }
+}