HTTPRequest: fix missing response data for HTTP status codes (closes #1699)

Backends now return error and response data, but public API has not changed.

This allows OpenFL to expose URLLoader.data on IOErrorEvent.IO_ERROR to match the behavior of Flash

src/lime/_internal/backend/flash/FlashHTTPRequest.hx

@@ -117,12 +117,13 @@ class FlashHTTPRequest
 
 		urlLoader.addEventListener(IOErrorEvent.IO_ERROR, function(event)
 		{
-			promise.error(event.errorID);
+			var bytes = Bytes.ofData(cast(urlLoader.data, ByteArray));
+			promise.error(new _HTTPRequestErrorResponse(event.errorID, bytes));
 		});
 
 		urlLoader.addEventListener(SecurityErrorEvent.SECURITY_ERROR, function(event)
 		{
-			promise.error(403);
+			promise.error(new _HTTPRequestErrorResponse(403, null));
 		});
 
 		urlLoader.addEventListener(Event.COMPLETE, function(event)
@@ -156,12 +157,13 @@ class FlashHTTPRequest
 
 		urlLoader.addEventListener(IOErrorEvent.IO_ERROR, function(event)
 		{
-			promise.error(event.errorID);
+			var responseData = cast(urlLoader.data, String);
+			promise.error(new _HTTPRequestErrorResponse(event.errorID, responseData));
 		});
 
 		urlLoader.addEventListener(SecurityErrorEvent.SECURITY_ERROR, function(event)
 		{
-			promise.error(403);
+			promise.error(new _HTTPRequestErrorResponse(403, null));
 		});
 
 		urlLoader.addEventListener(Event.COMPLETE, function(event)

src/lime/_internal/backend/html5/HTML5HTTPRequest.hx

@@ -407,10 +407,7 @@ class HTML5HTTPRequest
 		{
 			if (request.readyState != 4) return;
 
-			if (request.status != null && ((request.status >= 200 && request.status < 400) || (validStatus0 && request.status == 0)))
-			{
 			var bytes = null;
-
 			if (request.responseType == NONE)
 			{
 				if (request.responseText != null)
@@ -423,13 +420,15 @@ class HTML5HTTPRequest
 				bytes = Bytes.ofData(request.response);
 			}
 
+			if (request.status != null && ((request.status >= 200 && request.status < 400) || (validStatus0 && request.status == 0)))
+			{
 				processResponse();
 				promise.complete(bytes);
 			}
 			else
 			{
 				processResponse();
-				promise.error(request.status);
+				promise.error(new _HTTPRequestErrorResponse(request.status, bytes));
 			}
 
 			request = null;
@@ -482,7 +481,7 @@ class HTML5HTTPRequest
 				activeRequests--;
 				processQueue();
 
-				promise.error(event.detail);
+				promise.error(new _HTTPRequestErrorResponse(event.detail, null));
 			}, false);
 
 			image.src = uri;
@@ -505,7 +504,7 @@ class HTML5HTTPRequest
 
 			request.onerror = function(event:ErrorEvent)
 			{
-				promise.error(event.message);
+				promise.error(new _HTTPRequestErrorResponse(event.message, null));
 			}
 
 			request.onprogress = function(event:ProgressEvent)
@@ -542,7 +541,7 @@ class HTML5HTTPRequest
 			else
 			{
 				processResponse();
-				promise.error(request.status);
+				promise.error(new _HTTPRequestErrorResponse(request.status, request.responseText));
 			}
 
 			request = null;

src/lime/_internal/backend/native/NativeHTTPRequest.hx

@@ -465,7 +465,7 @@ class NativeHTTPRequest
 	private static function localThreadPool_onError(state:{instance:NativeHTTPRequest, promise:Promise<Bytes>, error:String}):Void
 	{
 		var promise:Promise<Bytes> = state.promise;
-		promise.error(state.error);
+		promise.error(new _HTTPRequestErrorResponse(state.error, null));
 
 		var instance = state.instance;
 
@@ -576,16 +576,21 @@ class NativeHTTPRequest
 				}
 				else if (instance.bytes != null)
 				{
-					instance.promise.error(instance.bytes.getString(0, instance.bytes.length));
+					var error = instance.bytes.getString(0, instance.bytes.length);
+					var responseData = instance.buildBuffer();
+					instance.promise.error(new _HTTPRequestErrorResponse(error, responseData));
 				}
 				else
 				{
-					instance.promise.error('Status ${state.status}');
+					var error = 'Status ${state.status}';
+					var responseData = instance.buildBuffer();
+					instance.promise.error(new _HTTPRequestErrorResponse(error, responseData));
 				}
 			}
 			else
 			{
-				instance.promise.error(CURL.strerror(state.result));
+				var error = CURL.strerror(state.result);
+				instance.promise.error(new _HTTPRequestErrorResponse(error, null));
 			}
 
 			if (instance.timeout != null)

src/lime/net/HTTPRequest.hx

@@ -106,7 +106,11 @@ public function load(uri:String = null):Future<T>
 		var future = __backend.loadData(this.uri);
 
 		future.onProgress(promise.progress);
-		future.onError(promise.error);
+		future.onError(function(errorResponse:_HTTPRequestErrorResponse<T>)
+		{
+			responseData = errorResponse.responseData;
+			promise.error(errorResponse.error);
+		});
 
 		future.onComplete(function(bytes)
 		{
@@ -140,7 +144,11 @@ public function load(uri:String = null):Future<T>
 		var future = __backend.loadText(this.uri);
 
 		future.onProgress(promise.progress);
-		future.onError(promise.error);
+		future.onError(function(errorResponse:_HTTPRequestErrorResponse<T>)
+		{
+			responseData = errorResponse.responseData;
+			promise.error(errorResponse.error);
+		});
 
 		future.onComplete(function(text)
 		{
@@ -152,6 +160,15 @@ public function load(uri:String = null):Future<T>
 	}
 }
 
+@:noCompletion class _HTTPRequestErrorResponse<T> {
+	public var error:Dynamic;
+	public var responseData:T;
+	public function new(error:Dynamic, responseData:T) {
+		this.error = error;
+		this.responseData = responseData;
+	}
+}
+
 @:noCompletion interface _IHTTPRequest
 {
 	public var contentType:String;