Question

我正在使用HttpsURLConnection连接到应用程序。一切都很好，直到我在请求中尝试使用参数（例如用户名和密码）之前，因为在服务器端空值已映射到参数。

     HttpsURLConnection connection = (HttpsURLConnection)url.openConnection();

         connection.addRequestProperty("password", "xxxx");
         connection.addRequestProperty("username", "aaaaaa");
         connection.addRequestProperty("eventId","btnLogin");

         connection.setRequestMethod("POST"); //$NON-NLS-1$
         connection.setDoOutput(true);
         connection.setDoInput(true);
         connection.setRequestProperty("Content-Type", "application/x-www-form-urlencoded");
         connection.setRequestProperty( "Accept", "*/*" );



         BufferedReader in = new BufferedReader(
                 new InputStreamReader(
                 connection.getInputStream()));
String decodedString;
while ((decodedString = in.readLine()) != null) {
System.out.println(decodedString);
}

我提到HttpsURLConnection可以工作，并且初始登录页面是通过HttpsUrlConnection检索的。

如何通过POST请求在服务器端成功发送参数。

此致

Answer 1

为了解决该问题，我创建了一个对HashMap对象的Map引用，该对象在键中存储了参数，在值中存储了这些参数的值。

之后，我创建了一个方法，该方法将返回一个String对象，其中包含用于POST请求的编码参数。

class SplashBloc extends Bloc<SplashEvent, SplashState> {
  final FirebaseService firebaseService;
  final DevicesService devicesService;
  final AuthService authService;
  final UserPreferences _userPreferences = UserPreferences();

  SplashBloc({
    @required this.firebaseService,
    @required this.devicesService,
    @required this.authService,
  });

  @override
  Stream<SplashEvent> transform(Stream<SplashEvent> events) {
    return (events as Observable<SplashEvent>).debounce(
        Duration(milliseconds: 500));
  }

  @override
  get initialState => SplashInitial();

  @override
  Stream<SplashState> mapEventToState(currentState, event) async* {
    if (event is SplashInitEvent) {
      if (currentState is SplashInitial) {
        yield InitLoading();

        try {
          firebaseService.togglePerformanceCollection(true);
          firebaseService.firebaseCloudMessagingListeners();

          String firebaseToken = await firebaseService
              .getFirebaseMessagingToken();
          bool isRegistered =
              await _userPreferences.getIsDeviceRegistered() ?? false;

          if (!isRegistered) {
            final String platform = event.isIOS ? 'IOS' : 'Android';
            final deviceInfo = await devicesService.getDeviceInfo(platform);
            isRegistered = await devicesService.register(
              deviceToken: firebaseToken,
              deviceInfo: deviceInfo,
            );
            if (isRegistered) {
              _userPreferences.setIsDeviceRegistered(true);
            }
          }

          yield InitSuccess();
        } catch (e) {
          yield InitFailure(error: e.toString());
        }
      }
    }

    if (event is SplashInitialEvent) {
      yield SplashInitial();
    }
  }
}

以上所有内容都在输出流中使用，以便将它们发送到服务器。

private String getOutput(Map<String, String> hm) throws UnsupportedEncodingException {

       String out = "";
       boolean start = true;

       for(Map.Entry<String, String> h : hm.entrySet()){
           if(start){

               start=false;
               out+=URLEncoder.encode(h.getKey(),  "UTF-8");
               out+="=";
               out+=URLEncoder.encode(h.getValue(), "UTF-8");
           }


           else{
               out += "&";
               out+=URLEncoder.encode(h.getKey(),  "UTF-8");
               out+="=";
               out+=URLEncoder.encode(h.getValue(), "UTF-8");
           }

       }

具有参数的Https身份验证

1 个答案: