From 11499aad9ae44409b81245e9f489a66f1fa6599e Mon Sep 17 00:00:00 2001
From: basbl <bas.bloembergen@castoredc.com>
Date: Mon, 16 Dec 2019 09:38:41 +0100
Subject: [PATCH] Add resource parameter handling to html, csv and xls writers

---
 src/PhpSpreadsheet/Writer/Csv.php  | 14 +++++++++++---
 src/PhpSpreadsheet/Writer/Html.php |  9 +++++++--
 src/PhpSpreadsheet/Writer/Xls.php  |  2 +-
 3 files changed, 19 insertions(+), 6 deletions(-)

diff --git a/src/PhpSpreadsheet/Writer/Csv.php b/src/PhpSpreadsheet/Writer/Csv.php
index 1166bd25..1cf64634 100644
--- a/src/PhpSpreadsheet/Writer/Csv.php
+++ b/src/PhpSpreadsheet/Writer/Csv.php
@@ -4,6 +4,7 @@ namespace PhpOffice\PhpSpreadsheet\Writer;
 
 use PhpOffice\PhpSpreadsheet\Calculation\Calculation;
 use PhpOffice\PhpSpreadsheet\Spreadsheet;
+use PhpOffice\PhpSpreadsheet\Writer\Exception as WriterException;
 
 class Csv extends BaseWriter
 {
@@ -77,7 +78,7 @@ class Csv extends BaseWriter
     /**
      * Save PhpSpreadsheet to file.
      *
-     * @param string $pFilename
+     * @param resource|string $pFilename
      *
      * @throws Exception
      */
@@ -92,9 +93,14 @@ class Csv extends BaseWriter
         Calculation::setArrayReturnType(Calculation::RETURN_ARRAY_AS_VALUE);
 
         // Open file
-        $fileHandle = fopen($pFilename, 'wb+');
+        if (is_resource($pFilename)) {
+            $fileHandle = $pFilename;
+        } else {
+            $fileHandle = fopen($pFilename, 'wb+');
+        }
+
         if ($fileHandle === false) {
-            throw new Exception("Could not open file $pFilename for writing.");
+            throw new WriterException("Could not open file $pFilename for writing.");
         }
 
         if ($this->excelCompatibility) {
@@ -126,6 +132,8 @@ class Csv extends BaseWriter
         }
 
         // Close file
+        rewind($fileHandle);
+
         fclose($fileHandle);
 
         Calculation::setArrayReturnType($saveArrayReturnType);
diff --git a/src/PhpSpreadsheet/Writer/Html.php b/src/PhpSpreadsheet/Writer/Html.php
index 37d68e91..91beedb7 100644
--- a/src/PhpSpreadsheet/Writer/Html.php
+++ b/src/PhpSpreadsheet/Writer/Html.php
@@ -146,7 +146,7 @@ class Html extends BaseWriter
     /**
      * Save Spreadsheet to file.
      *
-     * @param string $pFilename
+     * @param resource|string $pFilename
      *
      * @throws WriterException
      */
@@ -164,7 +164,12 @@ class Html extends BaseWriter
         $this->buildCSS(!$this->useInlineCss);
 
         // Open file
-        $fileHandle = fopen($pFilename, 'wb+');
+        if (is_resource($pFilename)) {
+            $fileHandle = $pFilename;
+        } else {
+            $fileHandle = fopen($pFilename, 'wb+');
+        }
+
         if ($fileHandle === false) {
             throw new WriterException("Could not open file $pFilename for writing.");
         }
diff --git a/src/PhpSpreadsheet/Writer/Xls.php b/src/PhpSpreadsheet/Writer/Xls.php
index 6932eb1a..95693dde 100644
--- a/src/PhpSpreadsheet/Writer/Xls.php
+++ b/src/PhpSpreadsheet/Writer/Xls.php
@@ -115,7 +115,7 @@ class Xls extends BaseWriter
     /**
      * Save Spreadsheet to file.
      *
-     * @param string $pFilename
+     * @param resource|string $pFilename
      *
      * @throws \PhpOffice\PhpSpreadsheet\Writer\Exception
      */