From 3b2d11fa2f7bd2f711cd561dd26edcce5c59f23b Mon Sep 17 00:00:00 2001
From: Adrien Castex <adrien.castex@protonmail.com>
Date: Tue, 1 Aug 2017 21:12:54 +0200
Subject: [PATCH] Fixed the GET Range

---
 lib/server/v2/commands/Get.js |  8 +++++---
 src/server/v2/commands/Get.ts | 10 ++++++----
 2 files changed, 11 insertions(+), 7 deletions(-)

diff --git a/lib/server/v2/commands/Get.js b/lib/server/v2/commands/Get.js
index 0baeb623..deea3ef5 100644
--- a/lib/server/v2/commands/Get.js
+++ b/lib/server/v2/commands/Get.js
@@ -23,9 +23,11 @@ var RangedStream = (function (_super) {
     }
     RangedStream.prototype._transform = function (chunk, encoding, callback) {
         if (this.nb < this.min) {
+            var lastNb = this.nb;
             this.nb += chunk.length;
             if (this.nb > this.min) {
-                chunk = chunk.slice(this.nb - this.min);
+                var start = this.min - lastNb;
+                chunk = chunk.slice(start, this.nb > this.max ? this.max - this.min + 1 + start : undefined);
                 callback(null, chunk);
             }
             else
@@ -38,7 +40,7 @@ var RangedStream = (function (_super) {
         else {
             this.nb += chunk.length;
             if (this.nb > this.max)
-                chunk = chunk.slice(0, this.max - (this.nb - chunk.length));
+                chunk = chunk.slice(0, this.max - (this.nb - chunk.length) + 1);
             callback(null, chunk);
         }
     };
@@ -90,7 +92,7 @@ var default_1 = (function () {
                                         ctx.setCode(WebDAVRequest_1.HTTPCodes.PartialContent);
                                         ctx.response.setHeader('Accept-Ranges', 'bytes');
                                         ctx.response.setHeader('Content-Type', mimeType);
-                                        ctx.response.setHeader('Content-Length', (max - min).toString());
+                                        ctx.response.setHeader('Content-Length', Math.min(size, max - min + 1).toString());
                                         ctx.response.setHeader('Content-Range', 'bytes ' + min + '-' + max + '/*');
                                         rstream.on('end', callback);
                                         rstream.pipe(new RangedStream(min, max)).pipe(ctx.response);
diff --git a/src/server/v2/commands/Get.ts b/src/server/v2/commands/Get.ts
index 02ea24a1..31e817d1 100644
--- a/src/server/v2/commands/Get.ts
+++ b/src/server/v2/commands/Get.ts
@@ -14,14 +14,16 @@ class RangedStream extends Transform
         this.nb = 0;
     }
 
-    _transform(chunk: any, encoding: string, callback: Function)
+    _transform(chunk : string | Buffer, encoding : string, callback : Function)
     {
         if(this.nb < this.min)
         {
+            const lastNb = this.nb;
             this.nb += chunk.length;
             if(this.nb > this.min)
             {
-                chunk = chunk.slice(this.nb - this.min);
+                const start = this.min - lastNb;
+                chunk = chunk.slice(start, this.nb > this.max ? this.max - this.min + 1 + start : undefined);
                 callback(null, chunk);
             }
             else
@@ -36,7 +38,7 @@ class RangedStream extends Transform
         {
             this.nb += chunk.length;
             if(this.nb > this.max)
-                chunk = chunk.slice(0, this.max - (this.nb - chunk.length));
+                chunk = chunk.slice(0, this.max - (this.nb - chunk.length) + 1);
             callback(null, chunk);
         }
     }
@@ -100,7 +102,7 @@ export default class implements HTTPMethod
                                             ctx.setCode(HTTPCodes.PartialContent);
                                             ctx.response.setHeader('Accept-Ranges', 'bytes')
                                             ctx.response.setHeader('Content-Type', mimeType)
-                                            ctx.response.setHeader('Content-Length', (max - min).toString())
+                                            ctx.response.setHeader('Content-Length', Math.min(size, max - min + 1).toString())
                                             ctx.response.setHeader('Content-Range', 'bytes ' + min + '-' + max + '/*')
 
                                             rstream.on('end', callback);