使用 Http 请求获取方法的 API 请求。但不知道 Flutter 中的实际问题

Question

我是新的扑动和学习api的请求。我请求get方法。但是它显示了错误!我收不到任何数据!

在Postman中，它工作得很好，数据也很好!

此api和令牌仅用于测试目的!所以，别担心!

Api请求

Future fetchAlbum() async {
final token = 'eyJ0eXAiOiJKV1QiLCJhbGciOiJIUzI1NiJ9.eyJzdWIiOjI4OTksImlzcyI6Imh0dHBzOi8vcG9ydGFsLWFwaS5qb21ha2hhdGEuY29tL2FwaS9hdXRoL2xvZ2luIiwiaWF0IjoxNjMxMjUxNjYwLCJleHAiOjE2MzEzMzgwNjAsIm5iZiI6MTYzMTI1MTY2MCwianRpIjoiNlFEUTZCYnBMT0JhdUJoaSJ9.jAY_2nYxjgsIvXZY5vn0vAr_pwF6UBYbSGZ8wqD0YPQ';
final response = await http.get(
Uri.parse('https://portal-api.jomakhata.com/api/getLeaveDetails?token=${token}'),
// Send authorization headers to the backend.
);
final responseJson = jsonDecode(response.body);
if(response.statusCode==200){
print("ok");
print(responseJson);
}
else{
print("error!");
}
return responseJson;
}

控制台错误

D/EGL_emulation(19932): app_time_stats: avg=14700.05ms min=577.55ms max=28822.55ms count=2
E/flutter (19932): [ERROR:flutter/lib/ui/ui_dart_state.cc(199)] Unhandled Exception: FormatException: Unexpected character (at character 335)
E/flutter (19932): ...ning":14}],"fiscalYear":"2021-2022"}{"message":"SQLSTATE[22001]: String ...
E/flutter (19932):                                        ^
E/flutter (19932): 
E/flutter (19932): #0      _ChunkedJsonParser.fail (dart:convert-patch/convert_patch.dart:1404:5)
E/flutter (19932): #1      _ChunkedJsonParser.parse (dart:convert-patch/convert_patch.dart:869:48)
E/flutter (19932): #2      _parseJson (dart:convert-patch/convert_patch.dart:40:10)
E/flutter (19932): #3      JsonDecoder.convert (dart:convert/json.dart:506:36)
E/flutter (19932): #4      JsonCodec.decode (dart:convert/json.dart:157:41)
E/flutter (19932): #5      jsonDecode (dart:convert/json.dart:96:10)
E/flutter (19932): #6      fetchAlbum (package:test_list/main.dart:51:24)
E/flutter (19932): <asynchronous suspension>
E/flutter (19932): 

Answer 1

您正在调用的API端点存在错误，更准确地说，存在SQL错误SQLSTATE[22001]: String data, right truncated: 1406 Data too long for column 'url' at row 1.

因此，在JSON输出中插入一条错误消息，如下所示:

}{
"message": ...

这不是邮差显示的问题，但结果你得到一个无效的JSON，在{和}之间应该有一个,。

所以当你尝试在Flutter中解码它时，你会得到一个错误，因为转换失败:Unhandled Exception: FormatException: Unexpected character.