Settings "content-type" http request is sent when the flutter: "application / json" error will appear Can not set the body fields of a Request with content-type "application / json"
Request follows:
final putResponse = await http.put('http://192.168.201.21/user/modifyUser',
body: putData,
headers: {"token": userBasicsInfo.userTokenResult,"content-type": "application/json"}
).then((response){
was backResult;
if(response.statusCode == 200){
Utf8Decoder utf8decoder = Utf8Decoder();
backResult = json.decode(utf8decoder.convert(response.bodyBytes));
}else{
print ( 'data request error: $ {response.statusCode}');
}
return backResult;
});
The following error occurs after the request is sent
E/flutter ( 7295): [ERROR:flutter/lib/ui/ui_dart_state.cc(148)] Unhandled Exception: Bad state: Cannot set the body fields of a Request with content-type "application/json".
Solution
Processing parameters to be submitted by jsonEncode
final putData = jsonEncode (params); // process parameters Submit
final putResponse = await http.put('http://192.168.201.21/user/modifyUser',
body: putData,
headers: {"token": userBasicsInfo.userTokenResult,"content-type": "application/json"}
).then((response){
was backResult;
if(response.statusCode == 200){
Utf8Decoder utf8decoder = Utf8Decoder();
backResult = json.decode(utf8decoder.convert(response.bodyBytes));
}else{
print ( 'data request error: $ {response.statusCode}');
}
return backResult;
});
After processing submit to success
note:
Body [body] setting request. It can be [String], [List] or [Map]. If it is a String, use the [encoding] encoded and used as the body of the request. Content type of request will default to "text / plain".
If [body] is List, the list will be used as the body of bytes requested.
If [body] is Map, using [encoding] encoded into the form fields. Content type is set to the request "application/x-www-form-urlencoded"; this can not be covered. [encoding] default [utf8].