# HG changeset patch
# User Roman Arutyunyan <arut@nginx.com>
# Date 1594300897 -10800
# Node ID 32a343635b50662979975e1204417bb1fc7e1b1f
# Parent  fac6e1a46206a9016cd309b73ca487664eac8903
Slice filter: clear original Accept-Ranges.

The slice filter allows ranges for the response by setting the r->allow_ranges
flag, which enables the range filter.  If the range was not requested, the
range filter adds an Accept-Ranges header to the response to signal the
support for ranges.

Previously, if an Accept-Ranges header was already present in the first slice
response, client received two copies of this header.  Now, the slice filter
removes the Accept-Ranges header from the response prior to setting the
r->allow_ranges flag.

diff --git a/src/http/modules/ngx_http_slice_filter_module.c b/src/http/modules/ngx_http_slice_filter_module.c
--- a/src/http/modules/ngx_http_slice_filter_module.c
+++ b/src/http/modules/ngx_http_slice_filter_module.c
@@ -180,6 +180,11 @@ ngx_http_slice_header_filter(ngx_http_re
     r->headers_out.content_range->hash = 0;
     r->headers_out.content_range = NULL;
 
+    if (r->headers_out.accept_ranges) {
+        r->headers_out.accept_ranges->hash = 0;
+        r->headers_out.accept_ranges = NULL;
+    }
+
     r->allow_ranges = 1;
     r->subrequest_ranges = 1;
     r->single_range = 1;