From 93a9747657e55c8e19c6aea9284657173cc734d4 Mon Sep 17 00:00:00 2001
From: Ryan Cramer <ryan@rc-d.net>
Date: Thu, 8 Nov 2018 09:28:03 -0500
Subject: [PATCH] Add @BitPoet processwire/processwire-requests#233 to make
 ajax file upload use chunked method for potential reduced memory usage and
 support of larger file uploads

---
 wire/core/WireUpload.php | 16 +++++++++++++++-
 1 file changed, 15 insertions(+), 1 deletion(-)

diff --git a/wire/core/WireUpload.php b/wire/core/WireUpload.php
index a77e6be0..4bb5f791 100644
--- a/wire/core/WireUpload.php
+++ b/wire/core/WireUpload.php
@@ -287,7 +287,21 @@ class WireUpload extends Wire {
 		$filename = rawurldecode($filename); // per #1487
 		$dir = $this->getUploadDir();
 		$tmpName = tempnam($dir, wireClassName($this, false));
-		file_put_contents($tmpName, file_get_contents('php://input')); 
+	
+		// upload without chunks:
+		// file_put_contents($tmpName, file_get_contents('php://input'));
+	
+		// upload with chunks (via @BitPoet processwire-requests#233)
+		$uploadData = fopen("php://input", "rb");
+		$saveFile = fopen($tmpName, "wb");
+		$chunkSize = 8192 * 1024; // about 8 megabytes
+		while(!feof($uploadData)) {
+			$chunk = fread($uploadData, $chunkSize); 
+			if($chunk !== false) fwrite($saveFile, $chunk);
+		}
+		fclose($saveFile);
+		fclose($uploadData);
+		
 		$filesize = is_file($tmpName) ? filesize($tmpName) : 0;
 		$error = $filesize ? UPLOAD_ERR_OK : UPLOAD_ERR_NO_FILE;