Setting custom headers right before creating session task, to make sure all headers can be overwritten.

Author: kevin-lyn

STNetTaskQueue/STHTTPNetTaskQueueHandler.m

@@ -121,10 +121,6 @@ - (void)start
     NSMutableURLRequest *request = [NSMutableURLRequest new];
     request.HTTPMethod = STHTTPNetTaskMethodMap[@(_task.method)];
 
-    for (NSString *headerField in headers) {
-        [request setValue:headers[headerField] forHTTPHeaderField:headerField];
-    }
-    
     if (_baseURL.user.length || _baseURL.password.length) {
         NSString *credentials = [NSString stringWithFormat:@"%@:%@", _baseURL.user, _baseURL.password];
         [request setValue:[NSString stringWithFormat:@"Basic %@", STBase64String(credentials)] forHTTPHeaderField:@"Authorization"];
@@ -140,7 +136,6 @@ - (void)start
                 urlComponents.query = [self queryStringFromParameters:parameters];
             }
             request.URL = urlComponents.URL;
-            sessionTask = [_session dataTaskWithRequest:request];
         }
             break;
         case STHTTPNetTaskPost:
@@ -157,7 +152,6 @@ - (void)start
                 NSString *contentType = [NSString stringWithFormat:@"multipart/form-data; boundary=%@", STHTTPNetTaskFormDataBoundary];
                 [request setValue:contentType forHTTPHeaderField: @"Content-Type"];
             }
-            sessionTask = [_session dataTaskWithRequest:request];
         }
             break;
         default: {
@@ -166,6 +160,11 @@ - (void)start
             break;
     }
 
+    for (NSString *headerField in headers) {
+        [request setValue:headers[headerField] forHTTPHeaderField:headerField];
+    }
+    sessionTask = [_session dataTaskWithRequest:request];
+    
     [STHTTPNetTaskToSessionTask setObject:sessionTask forKey:_task];
 
     sessionTask.operation = self;