Why put flutter returning bad request?

Question

I am making a mobile app using Flutter & Dart. I have a put request that updated a database. The request keeps giving a bad request 400. The code is as follow:

  Future<void> updateStudent(int id, Student newStudent) async {
    var res = await http.put(
    Uri.parse('https://10.0.2.2:7030/api/Student/{id}?Id=7'),
    headers: {
      "Accept": "application/json",
      "content-type": "application/json"
    },
    body: json.encode({
      'id': newStudent.id,
      'dep_id': newStudent.depId,
      'name_ar': newStudent.nameAr,
      'name_en': newStudent.nameEn,
      'name_moth': newStudent.nameMoth,
      'birth': newStudent.birth,          
    }));
  }

I tried many suggestions. Also I tried to do the request this way code. But same issue.

The API is working just fine with postman but for some reason it does not with Flutter. I postman I used query params and body with raw json There is something wrong but I am not able to find it. Any idea or suggestions?

Update

I debugged the request and it showing an error on "BodyField" stating the Bad state: Cannot access body fields of a Request without "content-type : application/x-www-form-urlencoded

Even though I am using json.

I also tried to change the content type but it is giving unsupported media type.

in postman I am using put method with this url https://localhost:7030/api/Student/{id}?Id=7

eamirho3ein · Answer 1 · 2022-09-04T13:51:54.957

0

Change your url and body to this:

var url = Uri.https('https://10.0.2.2:7030', 'api/Student/{id}');
var res = await http.put(
url,
headers: {
  "Accept": "application/json",
  "content-type": "application/json"
},
body: {
  'id': newStudent.id,
  'dep_id': newStudent.depId,
  'name_ar': newStudent.nameAr,
  'name_en': newStudent.nameEn,
  'name_moth': newStudent.nameMoth,
  'birth': newStudent.birth,          
});

you already add id in body, no need to put it in url too.

edited Sep 04 '22 at 13:51

answered Sep 03 '22 at 19:13

eamirho3ein

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And ultimately, please construct your URLs with Uri.replace(), not with string concatenation. No Bobby Tables here! – Randal Schwartz Sep 03 '22 at 21:33
It did not work. it still giving bad request – HuA Sep 04 '22 at 13:12
could please include the full url you are use in postman? – eamirho3ein Sep 04 '22 at 13:17
I include the link from postman and a picture of it – HuA Sep 04 '22 at 13:44
If that does not help you either, I updated again. – eamirho3ein Sep 04 '22 at 13:52
Thank you. But it did not work. I believe the uri is correct because I used the same format for the get request. – HuA Sep 04 '22 at 14:59
do you try my last Update? I changed uri and body – eamirho3ein Sep 04 '22 at 15:01
instead of encode body, pass map to itself. – eamirho3ein Sep 04 '22 at 15:02
How to "pass map to itself" – HuA Sep 04 '22 at 15:12
instead of jsonEncode({}) just pass {} – eamirho3ein Sep 04 '22 at 15:14

Why put flutter returning bad request?

1 Answers1