From dd245f40de4ba5168b0147c0589813b6f69a7b1a Mon Sep 17 00:00:00 2001
From: Kieran <kieran@harkin.me>
Date: Tue, 25 Apr 2017 19:17:50 +0800
Subject: [PATCH] support remote file fetching

---
 public/main.js | 17 ++++++++++++++++-
 upload.php     | 20 ++++++++++++++++++--
 2 files changed, 34 insertions(+), 3 deletions(-)

diff --git a/public/main.js b/public/main.js
index c803bd0..98fc6cd 100644
--- a/public/main.js
+++ b/public/main.js
@@ -166,6 +166,15 @@ function changeUI()
 */
 function uploadFile(f, id)
 {
+	if(typeof f === "string"){
+		var fx = new File([], 'remote');
+		fx.type = "text/plain";
+		fx.size = 0;
+		fx.url = f;
+		
+		f = fx;
+	}
+	
 	if(f instanceof Blob || f instanceof File)
 	{
 		if($('#' + id) === null){
@@ -225,7 +234,7 @@ function uploadFile(f, id)
 				xhr.upload.addEventListener('abort', function(evt) { uploadProgress(evt, id); });
 				xhr.addEventListener('readystatechange', function(evt) { uploadProgress(evt, id); });
 				
-				xhr.open("POST", "upload.php?filename=" + f.name);
+				xhr.open("POST", "upload.php?filename=" + f.name + (f.url !== undefined ? "&remote=" + encodeURIComponent(f.url) : ""));
 				xhr.send(f);
 			}
 		}
@@ -285,6 +294,12 @@ function handleFilePaste(evt)
 			var file_t = file.getAsFile();
 			file_t.name = "clipboard.png";
 			uploadFile(file_t, fid);
+		}else if(file.kind === 'string' && file.type === 'text/plain'){
+			var file_t = file.getAsString(function(url){
+				if(url.indexOf('http://') === 0 || url.indexOf('https://') === 0) {
+					uploadFile(url);
+				}
+			});
 		}
 	}
 }
diff --git a/upload.php b/upload.php
index b4992ed..5ee9962 100644
--- a/upload.php
+++ b/upload.php
@@ -24,8 +24,24 @@
 	}
 	else
 	{
-		$rawf = fopen('php://input', 'rb');
-		$tmpf = fopen('php://temp', 'rb+');
+		$source = isset($_GET["remote"]) ? $_GET["remote"] : "php://input";
+		
+		$rawf = fopen($source, 'rb');
+		
+		if(isset($_GET["remote"])){
+			$meta_data = stream_get_meta_data($rawf);
+			foreach($meta_data["wrapper_data"] as $hd){
+				if(strpos($hd, "Content-Type") === 0){
+					$nt = explode(": ", $hd);
+					$mime = $nt[1];
+				}else if(strpos($hd, "Content-Disposition") === 0){
+					$nn = explode("filename=", $hd);
+					$fname = str_replace("\"", "", $nn[1]);
+				}
+			}
+		}
+		
+		$tmpf = fopen("php://temp", 'rb+');
 		stream_copy_to_stream($rawf, $tmpf);
 		rewind($tmpf);