From 6991cbee4805990d6b84b6db763f9e207de60d81 Mon Sep 17 00:00:00 2001
From: Wleeaf <179125857+wleeaf@users.noreply.github.com>
Date: Sun, 25 Oct 2026 21:21:50 +0000
Subject: [PATCH] range: a suffix range longer than the content selects all of
 it

---
 jooby/src/main/java/io/jooby/ByteRange.java     |  3 ++-
 jooby/src/test/java/io/jooby/ByteRangeTest.java | 10 ++++++++++
 2 files changed, 12 insertions(+), 1 deletion(-)

diff --git a/jooby/src/main/java/io/jooby/ByteRange.java b/jooby/src/main/java/io/jooby/ByteRange.java
index 37bc47bf65..01bcc9708d 100644
--- a/jooby/src/main/java/io/jooby/ByteRange.java
+++ b/jooby/src/main/java/io/jooby/ByteRange.java
@@ -85,7 +85,8 @@ static ByteRange parse(@Nullable String value, long contentLength) {
       long start = range[0];
       long end = range[1];
       if (start == -1) {
-        start = contentLength - end;
+        // A suffix longer than the content selects all of it.
+        start = Math.max(0, contentLength - end);
         end = contentLength - 1;
       }
       if (end == -1 || end > contentLength - 1) {
diff --git a/jooby/src/test/java/io/jooby/ByteRangeTest.java b/jooby/src/test/java/io/jooby/ByteRangeTest.java
index 30ac51b666..b1de1fa00d 100644
--- a/jooby/src/test/java/io/jooby/ByteRangeTest.java
+++ b/jooby/src/test/java/io/jooby/ByteRangeTest.java
@@ -89,6 +89,16 @@ public void byteRange() {
           assertEquals("bytes 101-199/200", range.getContentRange());
         });
 
+    range(
+        "bytes=-300",
+        200,
+        range -> {
+          assertEquals(PARTIAL_CONTENT, range.getStatusCode());
+          assertEquals(0, range.getStart());
+          assertEquals(200, range.getEnd());
+          assertEquals("bytes 0-199/200", range.getContentRange());
+        });
+
     // 100-150 is ignored.
     range(
         "bytes=0-50, 100-150",