Flutter Web Dio 无法进行简单的 POST

Posted 2023-02-23

【中文标题】Flutter Web Dio 无法进行简单的 POST

【英文标题】：Flutter Web Dio failing to make a simple POST

【发布时间】：2021-05-26 00:10:15

【问题描述】：

任何帮助将不胜感激！如果不能解决 Dio，建议 Flutter Web 使用其他哪些软件包进行 POST（我需要能够添加 followRedirect=false，所以基本的 http 软件包已出）。谢谢！！

var resp = await Dio().post("xyz.com:1001/login", data: "user": email, "pass" : pwd)

获取

Error: Sorry, please contact support: DioError [DioErrorType.DEFAULT]: RangeError (index): Index out of range: index should be less than 1: 1
C:/b/s/w/ir/cache/builder/src/out/host_debug/dart-sdk/lib/_internal/js_dev_runtime/private/ddc_runtime/errors.dart 236:49  throw_
C:/b/s/w/ir/cache/builder/src/out/host_debug/dart-sdk/lib/_internal/js_dev_runtime/private/js_array.dart 581:7             _get]
packages/dio/src/options.dart 301:29                                                                                       get uri
packages/dio/src/adapters/browser_adapter.dart 30:37                                                                       <fn>
packages/dio/src/adapters/browser_adapter.dart 32:63                                                                       fetch
packages/dio/src/dio.dart 922:46                                                                                           _dispatchRequest
C:/b/s/w/ir/cache/builder/src/out/host_debug/dart-sdk/lib/_internal/js_dev_runtime/patch/async_patch.dart 45:50            <fn>
C:/b/s/w/ir/cache/builder/src/out/host_debug/dart-sdk/lib/async/zone.dart 1612:54                                          runUnary
C:/b/s/w/ir/cache/builder/src/out/host_debug/dart-sdk/lib/async/future_impl.dart 152:18                                    handleValue
C:/b/s/w/ir/cache/builder/src/out/host_debug/dart-sdk/lib/async/future_impl.dart 704:44                                    handleValueCallback
C:/b/s/w/ir/cache/builder/src/out/host_debug/dart-sdk/lib/async/future_impl.dart 733:13                                    _propagateToListeners
C:/b/s/w/ir/cache/builder/src/out/host_debug/dart-sdk/lib/async/future_impl.dart 539:5                                     [_completeWithValue]
C:/b/s/w/ir/cache/builder/src/out/host_debug/dart-sdk/lib/async/future_impl.dart 577:7                                     callback
C:/b/s/w/ir/cache/builder/src/out/host_debug/dart-sdk/lib/async/schedule_microtask.dart 40:11                              _microtaskLoop
C:/b/s/w/ir/cache/builder/src/out/host_debug/dart-sdk/lib/async/schedule_microtask.dart 49:5                               _startMicrotaskLoop
C:/b/s/w/ir/cache/builder/src/out/host_debug/dart-sdk/lib/_internal/js_dev_runtime/patch/async_patch.dart 166:15           <fn>

    at Object.throw_ [as throw] (http://localhost:56880/dart_sdk.js:5331:11)
    at throwError (http://localhost:56880/packages/webcargo_mobile/user/login.dart.lib.js:818:15)
    at _RootZone.runUnary (http://localhost:56880/dart_sdk.js:38886:58)
    at _FutureListener.catchError.handleError (http://localhost:56880/dart_sdk.js:33886:48)
    at handleError (http://localhost:56880/dart_sdk.js:34448:51)
    at Function._propagateToListeners (http://localhost:56880/dart_sdk.js:34474:17)
    at _Future.new.[_completeError] (http://localhost:56880/dart_sdk.js:34320:23)
    at _SyncCompleter.new.[_completeError] (http://localhost:56880/dart_sdk.js:33803:36)
    at _SyncCompleter.new.completeError (http://localhost:56880/dart_sdk.js:33726:29)
    at onError (http://localhost:56880/dart_sdk.js:33571:60)
    at _RootZone.runBinary (http://localhost:56880/dart_sdk.js:38891:58)
    at _FutureListener.then.handleError (http://localhost:56880/dart_sdk.js:33884:48)
    at handleError (http://localhost:56880/dart_sdk.js:34448:51)
    at Function._propagateToListeners (http://localhost:56880/dart_sdk.js:34474:17)
    at _Future.new.[_completeWithValue] (http://localhost:56880/dart_sdk.js:34312:23)
    at async._AsyncCallbackEntry.new.callback (http://localhost:56880/dart_sdk.js:34335:35)
    at Object._microtaskLoop (http://localhost:56880/dart_sdk.js:39173:13)
    at _startMicrotaskLoop (http://localhost:56880/dart_sdk.js:39179:13)
    at http://localhost:56880/dart_sdk.js:34686:9

【问题讨论】：

仅供参考，这也可以通过 http 包来完成。 pub.dev/documentation/http/latest/http/BaseRequest/…

感谢克里斯托弗！我将如何使用它？我可以添加到http.post(Uri.https("xyz.com:1000" , "login"), body: "user": email, "pass" : pwd) 吗？或者我是否需要使用HttpClientRequest，如果后者我尝试过但它导致了不同的问题，请参阅***.com/questions/66339121/…

好的，参见***.com/questions/66339121/…中的代码示例

【参考方案1】：

您的网址缺少方案，例如：http://

所以尝试添加类似http://example.com/login的方案