Make content type configurable when sending file

Author: mikehaertl

README.md

@@ -54,7 +54,7 @@ Property | Description
 Methods | Description
 ---------|-------------
 `saveAs($name)` | Saves the excel file under `$name`
-`send($name=null,$inline=false)` | Sends the excel file to the browser. If `$name` is empty, the file is streamed for inline display, otherwhise a download dialog will open, unless `$inline` is `true` which will force inline display even if a filename is supplied.
+`send($name=null, $inline=false, $contentType = 'application/vnd.ms-excel')` | Sends the excel file to the browser. If `$name` is empty, the file is streamed for inline display, otherwhise a download dialog will open, unless `$inline` is `true` which will force inline display even if a filename is supplied.
 `createSheets()` | Only creates the sheets of the excel workbook but does not save the file. This is usually called implicitely on `saveAs()` and `send()` but can also be called manually to modify the sheets before saving.
 `getWriter()` | Returns the `PHPExcel_Writer_Abstract` instance
 `getWorkbook()` | Returns the `PHPExcel` workbook instance

src/ExcelFile.php

@@ -106,11 +106,13 @@ public function saveAs($filename)
      * streamed inline.
      * @param bool $inline whether to force inline display of the file, even if
      * filename is present.
+     * @param string $contentType the Content-Type header. Default is
+     * 'application/vnd.ms-excel'.
      */
-    public function send($filename = null, $inline = false)
+    public function send($filename = null, $inline = false, $contentType =  'application/vnd.ms-excel')
     {
         $this->createFile();
-        $this->getTmpFile()->send($filename, 'application/vnd.ms-excel', $inline);
+        $this->getTmpFile()->send($filename, $contentType, $inline);
     }
 
     /**