[Send Test Mail] Use json MimeType, send data via POST method and catch json response errors

administrator/components/com_config/controller/application/sendtestmail.php

@@ -36,8 +36,12 @@ public function execute()
 			$this->app->redirect('index.php');
 		}
 
+		$this->app->mimeType = 'application/json';
+		$this->app->setHeader('Content-Type', $this->app->mimeType . '; charset=' . $this->app->charSet);
+		$this->app->sendHeaders();
+
 		$model = new ConfigModelApplication;
 		echo new JResponseJson($model->sendTestMail());
-		JFactory::getApplication()->close();
+		$this->app->close();
 	}
 }

administrator/components/com_config/view/application/html.php

@@ -73,6 +73,13 @@ public function render()
 
 		$this->userIsSuperAdmin = $user->authorise('core.admin');
 
+		// Add strings for translations in Javascript.
+		JText::script('COM_CONFIG_SENDMAIL_JS_ERROR_CONNECTION_ABORT');
+		JText::script('COM_CONFIG_SENDMAIL_JS_ERROR_NO_CONTENT');
+		JText::script('COM_CONFIG_SENDMAIL_JS_ERROR_OTHER');
+		JText::script('COM_CONFIG_SENDMAIL_JS_ERROR_PARSE');
+		JText::script('COM_CONFIG_SENDMAIL_JS_ERROR_TIMEOUT');
+
 		$this->addToolbar();
 
 		return parent::render();

administrator/language/en-GB/en-GB.com_config.ini

@@ -229,6 +229,11 @@ COM_CONFIG_SAVE_SUCCESS="Configuration successfully saved."
 COM_CONFIG_SENDMAIL_ACTION_BUTTON="Send Test Mail"
 COM_CONFIG_SENDMAIL_BODY="This is a test mail sent using "_QQ_"%s"_QQ_". If you receive it, then your email settings are correct!"
 COM_CONFIG_SENDMAIL_ERROR="Test mail could not be sent."
+COM_CONFIG_SENDMAIL_JS_ERROR_CONNECTION_ABORT="A connection abort as occured while fetching the JSON data."
+COM_CONFIG_SENDMAIL_JS_ERROR_NO_CONTENT="No content has returned."
+COM_CONFIG_SENDMAIL_JS_ERROR_OTHER="An error as occured while fetching the JSON data: HTTP %s status code."
+COM_CONFIG_SENDMAIL_JS_ERROR_PARSE="A parse error as occured while processing the following JSON data:<br/><code style="_QQ_"color:inherit;white-space:pre;padding:0;margin:0;border:0;background:inherit;"_QQ_">%s</code>"
+COM_CONFIG_SENDMAIL_JS_ERROR_TIMEOUT="A timeout as occured while fetching the JSON data."
 COM_CONFIG_SENDMAIL_METHOD_MAIL="PHP Mail"
 COM_CONFIG_SENDMAIL_METHOD_SENDMAIL="Sendmail"
 COM_CONFIG_SENDMAIL_METHOD_SMTP="SMTP"

media/system/js/sendtestmail-uncompressed.js

@@ -25,43 +25,77 @@ jQuery(document).ready(function ($)
 		};
 
 		$.ajax({
-				url: sendtestmail_url,
-				data: email_data
-			})
+			method: "POST",
+			url: sendtestmail_url,
+			data: email_data,
+			dataType: "json"
+		})
+		.fail(function (jqXHR, textStatus, error) {
+			var msg = {};
+
+			if (textStatus == 'parsererror')
+			{
+				// Html entity encode.
+				var encodedJson = jqXHR.responseText.trim();
+
+				var buf = [];
+				for (var i = encodedJson.length-1; i >= 0; i--) {
+					buf.unshift( [ '&#', encodedJson[i].charCodeAt(), ';' ].join('') );
+				}
 
-		.done(function (response)
-		{
-			var data_response = $.parseJSON(response);
+				encodedJson = buf.join('');
+
+				msg.error = [ Joomla.JText._('COM_CONFIG_SENDMAIL_JS_ERROR_PARSE').replace('%s', encodedJson) ];
+			}
+			else if (textStatus == 'nocontent')
+			{
+				msg.error = [ Joomla.JText._('COM_CONFIG_SENDMAIL_JS_ERROR_NO_CONTENT') ];
+			}
+			else if (textStatus == 'timeout')
+			{
+				msg.error = [ Joomla.JText._('COM_CONFIG_SENDMAIL_JS_ERROR_TIMEOUT') ];
+			}
+			else if (textStatus == 'abort')
+			{
+				msg.error = [ Joomla.JText._('COM_CONFIG_SENDMAIL_JS_ERROR_CONNECTION_ABORT') ];
+			}
+			else
+			{
+				msg.error = [ Joomla.JText._('COM_CONFIG_SENDMAIL_JS_ERROR_OTHER').replace('%s', jqXHR.status) ];
+			}
+
+			Joomla.renderMessages(msg);
+		})
+		.done(function (response) {
 			var msg = {};
 
-			if (data_response.data)
+			if (response.data)
 			{
-				if (typeof data_response.messages == 'object')
+				if (typeof response.messages == 'object')
 				{
-					if (typeof data_response.messages.success != 'undefined' && data_response.messages.success.length > 0)
+					if (typeof response.messages.success != 'undefined' && response.messages.success.length > 0)
 					{
-						msg.success = [data_response.messages.success];
+						msg.success = [response.messages.success];
 					}
 				}
-
 			}
 			else
 			{
-				if (typeof data_response.messages == 'object')
+				if (typeof response.messages == 'object')
 				{
-					if (typeof data_response.messages.error != 'undefined' && data_response.messages.error.length > 0)
+					if (typeof response.messages.error != 'undefined' && response.messages.error.length > 0)
 					{
-						msg.error = [data_response.messages.error];
+						msg.error = [response.messages.error];
 					}
 
-					if (typeof data_response.messages.notice != 'undefined' && data_response.messages.notice.length > 0)
+					if (typeof response.messages.notice != 'undefined' && response.messages.notice.length > 0)
 					{
-						msg.notice = [data_response.messages.notice];
+						msg.notice = [response.messages.notice];
 					}
 
-					if (typeof data_response.messages.message != 'undefined' && data_response.messages.message.length > 0)
+					if (typeof response.messages.message != 'undefined' && response.messages.message.length > 0)
 					{
-						msg.message = [data_response.messages.message];
+						msg.message = [response.messages.message];
 					}
 				}
 			}