gengx

backend/app/controller/api/Upload.php

@@ -118,12 +118,46 @@ class Upload extends BaseApi
         }
 
         $mime = $upload->mime_type ?: (@mime_content_type($path) ?: 'application/octet-stream');
-
-        return response(file_get_contents($path), 200, [
-            'Content-Type'  => $mime,
-            'Content-Length' => (string) filesize($path),
+        $size = (int) filesize($path);
+        $headers = [
+            'Content-Type' => $mime,
+            'Content-Length' => (string) $size,
+            'Accept-Ranges' => 'bytes',
             'Cache-Control' => 'public, max-age=604800',
-        ]);
+        ];
+
+        $range = trim((string) $this->request->header('range', ''));
+        if ($range !== '' && preg_match('/^bytes=(\d*)-(\d*)$/', $range, $matches)) {
+            $start = $matches[1] === '' ? 0 : (int) $matches[1];
+            $end = $matches[2] === '' ? $size - 1 : (int) $matches[2];
+            if ($matches[1] === '' && $matches[2] !== '') {
+                $length = min($size, (int) $matches[2]);
+                $start = $size - $length;
+                $end = $size - 1;
+            }
+            if ($start < 0 || $start >= $size || $end < $start) {
+                return response('', 416, [
+                    'Content-Range' => 'bytes */' . $size,
+                    'Accept-Ranges' => 'bytes',
+                ]);
+            }
+            $end = min($end, $size - 1);
+            $length = $end - $start + 1;
+            $handle = fopen($path, 'rb');
+            if ($handle === false || fseek($handle, $start) !== 0) {
+                if (is_resource($handle)) {
+                    fclose($handle);
+                }
+                throw new HttpResponseException(response('文件读取失败', 500));
+            }
+            $content = (string) fread($handle, $length);
+            fclose($handle);
+            $headers['Content-Length'] = (string) strlen($content);
+            $headers['Content-Range'] = "bytes {$start}-{$end}/{$size}";
+            return response($content, 206, $headers);
+        }
+
+        return response(file_get_contents($path), 200, $headers);
     }
 
     /**