Flutter: Send JSON body for Http GET request
uri.replace...
returns a new Uri
, so you have to assign it into a new variable or use directly into the get
function.
final newURI = uri.replace(queryParameters: params);
var response = await http.get(newURI, headers: {
"Authorization": Constants.APPOINTMENT_TEST_AUTHORIZATION_KEY,
HttpHeaders.contentTypeHeader: "application/json",
"callMethod" : "DOCTOR_AVAILABILITY"
});
using post:
var params = {
"doctor_id": "DOC000506",
"date_range": "25/03/2019-25/03/2019" ,
"clinic_id":"LAD000404"
};
var response = await http.post("http://theapiiamcalling:8000",
body: json.encode(params)
,headers: {
"Authorization": Constants.APPOINTMENT_TEST_AUTHORIZATION_KEY,
HttpHeaders.contentTypeHeader: "application/json",
"callMethod" : "DOCTOR_AVAILABILITY"
});
GET
GET requests are not intended for sending data to the server (but see this). That's why the http.dart
get
method doesn't have a body
parameter. However, when you want to specify what you are getting from the server, sometimes you need to include query parameters, which is a form of data. The query parameters are key-value pairs, so you can include them as a map like this:
final queryParameters = {
'name': 'Bob',
'age': '87',
};
final uri = Uri.http('www.example.com', '/path', queryParameters);
final headers = {HttpHeaders.contentTypeHeader: 'application/json'};
final response = await http.get(uri, headers: headers);
POST
Unlike GET requests, POST requests are intended for sending data in the body. You can do it like this:
final body = {
'name': 'Bob',
'age': '87',
};
final jsonString = json.encode(body);
final uri = Uri.http('www.example.com', '/path');
final headers = {HttpHeaders.contentTypeHeader: 'application/json'};
final response = await http.post(uri, headers: headers, body: jsonString);
Note that the parameters were a Map on the Dart side. Then they were converted to a JSON string by the json.encode()
function from the dart:convert
library. That string is the POST body.
So if the server is asking you to pass it data in a GET request body, check again. While it is possible to design a server in this way, it isn't standard.