onRequest method
The callback will be executed before the request is initiated.
If you want to continue the request, call handler.next
.
If you want to complete the request with some custom data,
you can resolve a Response
object with handler.resolve
.
If you want to complete the request with an error message,
you can reject a DioError
object with handler.reject
.
Implementation
@override
void onRequest(
RequestOptions options, RequestInterceptorHandler handler) async {
options.headers['Content-type'] = 'application/json';
options.headers['Accept'] = 'application/json';
print(options.data);
print(options.uri);
print(options.method);
return super.onRequest(options, handler);
}