Flutter http headers












1














The post request throwing error while setting the header map.



Here is my code



Future<GenericResponse> makePostCall(
GenericRequest genericRequest) {String URL = "$BASE_URL/api/";

Map data = {
"name": "name",
"email": "email",
"mobile": "mobile",
"transportationRequired": false,
"userId": 5,
};

Map userHeader = {"Content-type": "application/json", "Accept": "application/json"};


return _netUtil.post(URL, body: data, headers:userHeader).then((dynamic res) {
print(res);
if (res["code"] != 200) throw new Exception(res["message"][0]);
return GenericResponse.fromJson(res);
});


}



but I'm getting this exception with headers.



`══╡ EXCEPTION CAUGHT BY GESTURE ╞═
flutter: The following assertion was thrown while handling a gesture:
flutter: type '_InternalLinkedHashMap' is not a subtype of type 'Map'
flutter:
flutter: Either the assertion indicates an error in the framework itself, or we should provide substantially
flutter: more information in this error message to help you determine and fix the underlying cause.
flutter: In either case, please report this assertion by filing a bug on GitHub:
flutter: https://github.com/flutter/flutter/issues/new?template=BUG.md
flutter:
flutter: When the exception was thrown, this was the stack:
flutter: #0 NetworkUtil.post1 (package:saranam/network/network_util.dart:50:41)
flutter: #1 RestDatasource.bookPandit (package:saranam/network/rest_data_source.dart:204:21)



Anybody facing this issue? I didn't find any clue with the above log.










share|improve this question



























    1














    The post request throwing error while setting the header map.



    Here is my code



    Future<GenericResponse> makePostCall(
    GenericRequest genericRequest) {String URL = "$BASE_URL/api/";

    Map data = {
    "name": "name",
    "email": "email",
    "mobile": "mobile",
    "transportationRequired": false,
    "userId": 5,
    };

    Map userHeader = {"Content-type": "application/json", "Accept": "application/json"};


    return _netUtil.post(URL, body: data, headers:userHeader).then((dynamic res) {
    print(res);
    if (res["code"] != 200) throw new Exception(res["message"][0]);
    return GenericResponse.fromJson(res);
    });


    }



    but I'm getting this exception with headers.



    `══╡ EXCEPTION CAUGHT BY GESTURE ╞═
    flutter: The following assertion was thrown while handling a gesture:
    flutter: type '_InternalLinkedHashMap' is not a subtype of type 'Map'
    flutter:
    flutter: Either the assertion indicates an error in the framework itself, or we should provide substantially
    flutter: more information in this error message to help you determine and fix the underlying cause.
    flutter: In either case, please report this assertion by filing a bug on GitHub:
    flutter: https://github.com/flutter/flutter/issues/new?template=BUG.md
    flutter:
    flutter: When the exception was thrown, this was the stack:
    flutter: #0 NetworkUtil.post1 (package:saranam/network/network_util.dart:50:41)
    flutter: #1 RestDatasource.bookPandit (package:saranam/network/rest_data_source.dart:204:21)



    Anybody facing this issue? I didn't find any clue with the above log.










    share|improve this question

























      1












      1








      1







      The post request throwing error while setting the header map.



      Here is my code



      Future<GenericResponse> makePostCall(
      GenericRequest genericRequest) {String URL = "$BASE_URL/api/";

      Map data = {
      "name": "name",
      "email": "email",
      "mobile": "mobile",
      "transportationRequired": false,
      "userId": 5,
      };

      Map userHeader = {"Content-type": "application/json", "Accept": "application/json"};


      return _netUtil.post(URL, body: data, headers:userHeader).then((dynamic res) {
      print(res);
      if (res["code"] != 200) throw new Exception(res["message"][0]);
      return GenericResponse.fromJson(res);
      });


      }



      but I'm getting this exception with headers.



      `══╡ EXCEPTION CAUGHT BY GESTURE ╞═
      flutter: The following assertion was thrown while handling a gesture:
      flutter: type '_InternalLinkedHashMap' is not a subtype of type 'Map'
      flutter:
      flutter: Either the assertion indicates an error in the framework itself, or we should provide substantially
      flutter: more information in this error message to help you determine and fix the underlying cause.
      flutter: In either case, please report this assertion by filing a bug on GitHub:
      flutter: https://github.com/flutter/flutter/issues/new?template=BUG.md
      flutter:
      flutter: When the exception was thrown, this was the stack:
      flutter: #0 NetworkUtil.post1 (package:saranam/network/network_util.dart:50:41)
      flutter: #1 RestDatasource.bookPandit (package:saranam/network/rest_data_source.dart:204:21)



      Anybody facing this issue? I didn't find any clue with the above log.










      share|improve this question













      The post request throwing error while setting the header map.



      Here is my code



      Future<GenericResponse> makePostCall(
      GenericRequest genericRequest) {String URL = "$BASE_URL/api/";

      Map data = {
      "name": "name",
      "email": "email",
      "mobile": "mobile",
      "transportationRequired": false,
      "userId": 5,
      };

      Map userHeader = {"Content-type": "application/json", "Accept": "application/json"};


      return _netUtil.post(URL, body: data, headers:userHeader).then((dynamic res) {
      print(res);
      if (res["code"] != 200) throw new Exception(res["message"][0]);
      return GenericResponse.fromJson(res);
      });


      }



      but I'm getting this exception with headers.



      `══╡ EXCEPTION CAUGHT BY GESTURE ╞═
      flutter: The following assertion was thrown while handling a gesture:
      flutter: type '_InternalLinkedHashMap' is not a subtype of type 'Map'
      flutter:
      flutter: Either the assertion indicates an error in the framework itself, or we should provide substantially
      flutter: more information in this error message to help you determine and fix the underlying cause.
      flutter: In either case, please report this assertion by filing a bug on GitHub:
      flutter: https://github.com/flutter/flutter/issues/new?template=BUG.md
      flutter:
      flutter: When the exception was thrown, this was the stack:
      flutter: #0 NetworkUtil.post1 (package:saranam/network/network_util.dart:50:41)
      flutter: #1 RestDatasource.bookPandit (package:saranam/network/rest_data_source.dart:204:21)



      Anybody facing this issue? I didn't find any clue with the above log.







      http dart http-headers flutter






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      share|improve this question











      share|improve this question




      share|improve this question










      asked Nov 14 '18 at 11:43









      Satya Attili

      205213




      205213
























          1 Answer
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          1














          try



           Map<String, String> requestHeaders = {
          'Content-type': 'application/json',
          'Accept': 'application/json',
          };





          share|improve this answer





















          • Thanks, @Sami Kanafani, it solved my issue partially.
            – Satya Attili
            Nov 14 '18 at 19:30










          • why partially, what is your current problem?
            – Sami Kanafani
            Nov 16 '18 at 18:14











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          active

          oldest

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          active

          oldest

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          1














          try



           Map<String, String> requestHeaders = {
          'Content-type': 'application/json',
          'Accept': 'application/json',
          };





          share|improve this answer





















          • Thanks, @Sami Kanafani, it solved my issue partially.
            – Satya Attili
            Nov 14 '18 at 19:30










          • why partially, what is your current problem?
            – Sami Kanafani
            Nov 16 '18 at 18:14
















          1














          try



           Map<String, String> requestHeaders = {
          'Content-type': 'application/json',
          'Accept': 'application/json',
          };





          share|improve this answer





















          • Thanks, @Sami Kanafani, it solved my issue partially.
            – Satya Attili
            Nov 14 '18 at 19:30










          • why partially, what is your current problem?
            – Sami Kanafani
            Nov 16 '18 at 18:14














          1












          1








          1






          try



           Map<String, String> requestHeaders = {
          'Content-type': 'application/json',
          'Accept': 'application/json',
          };





          share|improve this answer












          try



           Map<String, String> requestHeaders = {
          'Content-type': 'application/json',
          'Accept': 'application/json',
          };






          share|improve this answer












          share|improve this answer



          share|improve this answer










          answered Nov 14 '18 at 12:17









          Sami Kanafani

          487511




          487511












          • Thanks, @Sami Kanafani, it solved my issue partially.
            – Satya Attili
            Nov 14 '18 at 19:30










          • why partially, what is your current problem?
            – Sami Kanafani
            Nov 16 '18 at 18:14


















          • Thanks, @Sami Kanafani, it solved my issue partially.
            – Satya Attili
            Nov 14 '18 at 19:30










          • why partially, what is your current problem?
            – Sami Kanafani
            Nov 16 '18 at 18:14
















          Thanks, @Sami Kanafani, it solved my issue partially.
          – Satya Attili
          Nov 14 '18 at 19:30




          Thanks, @Sami Kanafani, it solved my issue partially.
          – Satya Attili
          Nov 14 '18 at 19:30












          why partially, what is your current problem?
          – Sami Kanafani
          Nov 16 '18 at 18:14




          why partially, what is your current problem?
          – Sami Kanafani
          Nov 16 '18 at 18:14


















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