How to remove quotation and symbols while decoding from JSON value? Flutter - flutter

Question

This is the code to get my auth token.
Future <String> getToken() async{
final SharedPreferences prefs = await SharedPreferences.getInstance();
return prefs.getString('token');
}
When i print the token it gives me this json value with double quotation mark.
I/flutter (14710): "eyJ0eXAiOiJKV1QiLCJhbGciOiJSUzI1NiJ9.eyJhdWQiOiIxIiwianRpIjoiZDQzZjFjNWZjZDQxYjIzYzllNGU2ZWIyZjQ1M2FmZDgwOTJiNGZmNDAyYjI0OTBmM2RiYTUzMTgzYTU2ODZjNTNiNzVmMDY3ZmIzMmNjMjUiLCJpYXQiOjE1OTA0MDg2NjksIm5iZiI6MTU5MDQwODY2OSwiZXhwIjoxNjIxOTQ0NjY5LCJzdWIiOiIxIiwic2NvcGVzIjpbXX0.3YYdR8P1_XzK--VLAwT5gxmkyLZPMuvQhzQQ5OOl_nv0jriPwFY9sqHdL_wiqpAA5vtgBOnyAwZ2kSI_BgDzsKZzY2vMVa47Tyuz87uEFZ7-aHYvNY_r4T_gIkwAuLwc8qN2kuytFjEtuq-iQUiWgEzp5y2n3BDlzXZ7rZi5Xp1_y_6_ysII9RQtX37LuDFt3AIRbYLGDBAilPHi0iJB_jQqWqH8J1mUzCsArj2VuSel7kERqpwFz-SwOOS4EA7CaoOuOlleOpynBalTK9vm1vU3n81K4TAgNq-Mg9CsiFMVQULURdmku7-2gcc3VS8vBXo9OlEgzqmGjLDvIy8_-LCcwuoSVC2DL2t2PIcNUDKQsBu1GBPQ99wzHcnyEpvjVRkg7v4zQWtlIUY6PcLjNf_vnfuXuCERAwBwjS86T7n8ZscfmVVebISVvAKyDN6YhW41hnUw-AZYRLtuhbE8Z48V0tLfLw9aeVr-Qe2mlaYj0LqGYlqBLqUtRl9HSaA9USa6tQ1KQJvF5_6JPcIBJuSkEsrY9n1xhnCViAiyFVF4XWbtToULn69B2UtoXw1X8y_Wek_T7D7t0fi5KWKj8QHO6yI3ZIWViERS2K6n7mnL_3z_7CNeewVxmqMXNdeWl7yPmAMzUAv6z7pWm-R1Qpv7tNVj4-FfQAk3vOm56hE"
This is how i used the token you get the post from api but it isnt working.
Future<Model> ViewWelcomeScreen() async {
String url = '$baseurl/post/20';
ApiService().getToken().then((value){
token = value;
});
final response = await http.get(url, headers: {
'Content-type': 'application/json',
'Accept': 'application/json',
'Authorization': 'Bearer $token'
});
print(token);
if (response.statusCode == 200) {
var test = json.decode(response.body);
var jsonResponse = test['data'];
return Model.fromJson(jsonResponse);
} else {
throw Exception('Failed to load data');
}
}

Answer 1

Future<Model> ViewWelcomeScreen() async {
String url = '$baseurl/post/20';
ApiService().getToken().then((value){
token = value;
});
final response = await http.get(url, headers: {
'Content-type': 'application/json',
'Accept': 'application/json',
'Authorization': 'Bearer $token'
});
print(token);
if (response.statusCode == 200) {
var test = json.decode(response.body);
var jsonResponse = test['data'];
return Model.fromJson(jsonResponse);
} else {
throw Exception('Failed to load data');
}
}
code is wrong in a way, think you have async and then both on the same function, why?
ApiService().getToken().then((value){
token = value;
});
here you're saying I want token and I don't need to be awaited then you go and try to use that variable
final response = await http.get(url, headers: {
'Content-type': 'application/json',
'Accept': 'application/json',
'Authorization': 'Bearer $token'
});
see in flutter every async-await works like event loop in javascript
I write async
normal code
using then in 1. function
dependent code in 1. as async-await
what will be the output?
event loop will be having 1,2,3,4 as async functions
first, it will run 1 and as soon as it receives normal code it runs normally but if it receives then it will understand that this result is not important so let me do rest of the work and will come back to execute 3rd then function so it will run 4 and then 3rd function
but you want token so
ApiService().getToken().then((value){
token = value;
});
replace this to
token = await ApiService().getToken();
your service might need token and that's the reason it's not 200 status code.

Answer 2

If you just want to remove the "" from the string, then just use the replaceAll method
String string = '"foo"';
//Output: 'foo'
string.replaceAll('"', '');