Added a progress reporting callback

Author: lyze237

README.md

@@ -138,6 +138,7 @@ RestClient.Request(new RequestHelper {
   Retries = 3, //Number of retries
   RetrySecondsDelay = 2, //Seconds of delay to make a retry
   RetryCallback = (err, retries) => {}, //See the error before retrying the request
+  ProgressCallback = (percent) => {}, //Reports progress of the request from 0 to 1
   EnableDebug = true, //See logs of the requests for debug mode
   IgnoreHttpException = true, //Prevent to catch http exceptions
   ChunkedTransfer = false,
@@ -260,6 +261,14 @@ currentRequest.DownloadedBytes; //The number of bytes of body data the system ha
 currentRequest.Abort(); //Abort the request manually
 ```
 
+Additionally we can run a callback function whenever a progress change happens!
+```csharp
+RestClient.Get(new RequestHelper {
+  Uri = "https://jsonplaceholder.typicode.com/users", 
+  ProgressCallback = percent => Debug.Log(percent)
+});
+```
+
 Later we can clear the default headers and params for all requests
 ```csharp
 RestClient.ClearDefaultHeaders();

src/Proyecto26.RestClient/Helpers/Common.cs

@@ -78,10 +78,10 @@ private static void ConfigureWebRequestWithOptions(UnityWebRequest request, byte
         /// <summary>
         /// Send the web request to the server
         /// </summary>
-        /// <returns>An UnityWebRequestAsyncOperation object.</returns>
+        /// <returns>An AsyncOperation object.</returns>
         /// <param name="request">An UnityWebRequest object.</param>
         /// <param name="options">An options object.</param>
-        public static IEnumerator SendWebRequestWithOptions(this UnityWebRequest request, RequestHelper options)
+        public static AsyncOperation SendWebRequestWithOptions(this UnityWebRequest request, RequestHelper options)
         {
             byte[] bodyRaw = options.BodyRaw;
             string contentType = string.Empty;
@@ -119,9 +119,9 @@ public static IEnumerator SendWebRequestWithOptions(this UnityWebRequest request
 
             ConfigureWebRequestWithOptions(request, bodyRaw, contentType, options);
 #if UNITY_2017_2_OR_NEWER
-            yield return request.SendWebRequest();
+            return request.SendWebRequest();
 #else
-            yield return request.Send();
+            return request.Send();
 #endif
         }
     }

src/Proyecto26.RestClient/Helpers/HttpBase.cs

@@ -15,7 +15,22 @@ public static IEnumerator CreateRequestAndRetry(RequestHelper options, Action<Re
             {
                 using (var request = CreateRequest(options))
                 {
-                    yield return request.SendWebRequestWithOptions(options);
+                    var sendRequest  = request.SendWebRequestWithOptions(options);
+                    if (options.ProgressCallback == null)
+                    {
+                        yield return sendRequest;
+                    }
+                    else
+                    {
+                        while (!sendRequest.isDone)
+                        {
+                            options.ProgressCallback(sendRequest.progress);
+                            yield return null;
+                        }
+
+                        options.ProgressCallback(1);
+                    }
+                    
                     var response = request.CreateWebResponse();
                     if (request.IsValidRequest(options))
                     {

src/Proyecto26.RestClient/Helpers/RequestHelper.cs

@@ -106,7 +106,18 @@ public Action<RequestException, int> RetryCallback
             get { return _retryCallback; }
             set { _retryCallback = value; }
         }
+        
+        private Action<float> _progressCallback;
 
+        /// <summary>
+        /// A callback executed everytime the requests progress changes (From 0 to 1)
+        /// </summary>
+        public Action<float> ProgressCallback
+        {
+            get { return _progressCallback; }
+            set { _progressCallback = value; }
+        }
+        
         private bool _enableDebug;
         /// <summary>
         /// Enable logs of the requests for debug mode