Question

我正在为我的公司制作一个应用程序，我需要它在专用网络（VPN）上工作，但是当我在VPN上无法正常工作时，尝试打印结果witch应该给我一个json代替给我这个“

401-未经授权：由于无效而拒绝访问凭据。

”，但是如果将URL更改为“ [https://randomuser.me/api/?results=15][1]”，则可以毫无问题地获取数据。在使用VPN时，我尝试检查连接性，但没有结果。

...
class _MyHomePageState extends State<MyHomePage> {

  var _connection = 'Unknown';
  Connectivity connectivity;
  StreamSubscription<ConnectivityResult> subscription;

  String url = 'myUrl';
  List data;

  Future<String> makeRequest() async {
    var response = await http
        .post(url, headers: {'Accept': 'application/json'});

  print('________________________________________________________________________^^^^ '+ response.body );
    setState(() {
      var extractdata = json.decode(response.body);
      //data = extractdata;
      //print( data[0]["name"]["first"]);
    });

  }

  @override
  void initState() {
    super.initState();
    connectivity = new Connectivity();
    subscription = connectivity.onConnectivityChanged.listen( (ConnectivityResult result){print('RESULT');print(result);});
    this.makeRequest();
  }

  @override
  void dispose(){
    subscription.cancel();
    super.dispose();
  }
...

这是控制台结果

Performing hot restart...
Syncing files to device SM J500FN...
Restarted application in 5 173ms.
I/flutter (16502): RESULT
I/flutter (16502): ConnectivityResult.none
I/flutter (16502): ________________________________________________________________________^^^^ <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
I/flutter (16502): <html xmlns="http://www.w3.org/1999/xhtml">
I/flutter (16502): <head>
I/flutter (16502): <meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1"/>
I/flutter (16502): <title>401 - Unauthorized: Access is denied due to invalid credentials.</title>
I/flutter (16502): <style type="text/css">
I/flutter (16502): <!--
I/flutter (16502): body{margin:0;font-size:.7em;font-family:Verdana, Arial, Helvetica, sans-serif;background:#EEEEEE;}
I/flutter (16502): fieldset{padding:0 15px 10px 15px;} 
I/flutter (16502): h1{font-size:2.4em;margin:0;color:#FFF;}
I/flutter (16502): h2{font-size:1.7em;margin:0;color:#CC0000;} 
I/flutter (16502): h3{font-size:1.2em;margin:10px 0 0 0;color:#000000;} 
I/flutter (16502): #header{width:96%;margin:0 0 0 0;padding:6px 2% 6px 2%;font-family:"trebuchet MS", Verdana, sans-serif;color:#FFF;
I/flutter (16502): background-color:#555555;}
I/flutter (16502): #content{margin:0 0 0 2%;position:relative;}
I/flutter (16502): .content-container{background:#FFF;width:96%;margin-top:8px;padding:10px;position:relative;}
I/flutter (16502): -->
I/flutter (16502): </style>
I/flutter (16502): </head>
I/flutter (16502): <body
E/flutter (16502): [ERROR:flutter/lib/ui/ui_dart_state.cc(148)] Unhandled Exception: FormatException: Unexpected character (at character 1)
E/flutter (16502): <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org...
E/flutter (16502): ^
E/flutter (16502): 
E/flutter (16502): #0      _ChunkedJsonParser.fail (dart:convert/runtime/libconvert_patch.dart:1357:5)
E/flutter (16502): #1      _ChunkedJsonParser.parseNumber (dart:convert/runtime/libconvert_patch.dart:1253:9)
E/flutter (16502): #2      _ChunkedJsonParser.parse (dart:convert/runtime/libconvert_patch.dart:921:22)
E/flutter (16502): #3      _parseJson (dart:convert/runtime/libconvert_patch.dart:29:10)
E/flutter (16502): #4      JsonDecoder.convert (dart:convert/json.dart:491:36)
E/flutter (16502): #5      JsonCodec.decode (dart:convert/json.dart:149:41)
E/flutter (16502): #6      _MyHomePageState.makeRequest.<anonymous closure> (package:doi_report/homepage.dart:30:30)
E/flutter (16502): #7      State.setState (package:flutter/src/widgets/framework.dart:1122:30)
E/flutter (16502): #8      _MyHomePageState.makeRequest (package:doi_report/homepage.dart:29:5)
E/flutter (16502): <asynchronous suspension>
E/flutter (16502): #9      _MyHomePageState.initState (package:doi_report/homepage.dart:42:10)
E/flutter (16502): #10     StatefulElement._firstBuild (package:flutter/src/widgets/framework.dart:3846:58)
E/flutter (16502): #11     ComponentElement.mount (package:flutter/src/widgets/framework.dart:3711:5)
E/flutter (16502): #12     Element.inflateWidget (package:flutter/src/widgets/framework.dart:2956:14)
E/flutter (16502): #13     Element.updateChild (package:flutter/src/widgets/framework.dart:2759:12)
E/flutter (16502): #14     SingleChildRenderObjectElement.mount (package:flutter/src/widgets/framework.dart:4876:14)
E/flutter (16502): #15     Element.inflateWidget (package:flutter/src/widgets/framework.dart:2956:14)
E/flutter (16502): #16     Element.updateChild (package:flutter/src/widgets/framework.dart:2759:12)
E/flutter (16502): #17     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:3747:16)
E/flutter (16502): #18     Element.rebuild (package:flutter/src/widgets/framework.dart:3559:5)
E/flutter (16502): #19     ComponentElement._firstBuild (package:flutter/src/widgets/framework.dart:3716:5)
E/flutter (16502): #20     ComponentElement.mount (package:flutter/src/widgets/framework.dart:3711:5)
E/flutter (16502): #21     Element.inflateWidget (package:flutter/src/widgets/framework.dart:2956:14)
E/flutter (16502): #22     Element.updateChild (package:flutter/src/widgets/framework.dart:2759:12)
E/flutter (16502): #23     SingleChildRenderObjectElement.mount (package:flutter/src/widgets/framework.dart:4876:14)
E/flutter (16502): #24     Element.inflateWidget (package:flutter/src/widgets/framework.dart:2956:14)
E/flutter (16502): #25     Element.updateChild (package:flutter/src/widgets/framework.dart:2759:12)
E/flutter (16502): #26     SingleChildRenderObjectElement.mount (package:flutter/src/widgets/framework.dart:4876:14)
E/flutter (16502): #27     Element.inflateWidget (package:flutter/src/widgets/framework.dart:2956:14)
E/flutter (16502): #28     Element.updateChild (package:flutter/src/widgets/framework.dart:2759:12)
E/flutter (16502): #29     SingleChildRenderObjectElement.mount (package:flutter/src/widgets/framework.dart:4876:14)
E/flutter (16502): #30     Element.inflateWidget (package:flutter/src/widgets/framework.dart:2956:14)
E/flutter (16502): #31     Element.updateChild (package:flutter/src/widgets/framework.dart:2759:12)
E/flutter (16502): #32     SingleChildRenderObjectElement.mount (package:flutter/src/widgets/framework.dart:4876:14)
E/flutter (16502): #33     Element.inflateWidget (package:flutter/src/widgets/framework.dart:2956:14)
E/flutter (16502): #34     Element.updateChild (package:flutter/src/widgets/framework.dart:2759:12)
E/flutter (16502): #35     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:3747:16)
E/flutter (16502): #36     Element.rebuild (package:flutter/src/widgets/framework.dart:3559:5)
E/flutter (16502): #37     ComponentElement._firstBuild (package:flutter/src/widgets/framework.dart:3716:5)
E/flutter (16502): #38     StatefulElement._firstBuild (package:flutter/src/widgets/framework.dart:3864:11)
E/flutter (16502): #39     ComponentElement.mount (package:flutter/src/widgets/framework.dart:3711:5)
E/flutter (16502): #40     Element.inflateWidget (package:flutter/src/widgets/framework.dart:2956:14)
E/flutter (16502): #41     Element.updateChild (package:flutter/src/widgets/framework.dart:2759:12)
E/flutter (16502): #42     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:3747:16)
E/flutter (16502): #43     Element.rebuild (package:flutter/src/widgets/framework.dart:3559:5)
E/flutter (16502): #44     ComponentElement._firstBuild (package:flutter/src/widgets/framework.dart:3716:5)
E/flutter (16502): #45     ComponentElement.mount (package:flutter/src/widgets/```

Answer 1

问题出在身份验证的服务器类型上，我启用了Windows身份验证，这就是不允许我的应用访问我想从php文件中检索的数据的问题。尽管我必须说检查连接性以及当我使用vpn时没有结果，但我还是认为问题出在应用程序中而不是服务器中。

它可以在禁用Windows身份验证的情况下工作，但是checkconnection的结果仍然没有。

在专用网络（vpn）上时，我的flutter应用程序无法连接到互联网

1 个答案: