[nginx] Slice filter: clear original Accept-Ranges.

[Roman Arutyunyan]

details:   https://hg.nginx.org/nginx/rev/32a343635b50
branches:  
changeset: 7684:32a343635b50
user:      Roman Arutyunyan <arut at nginx.com>
date:      Thu Jul 09 16:21:37 2020 +0300
description:
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.

diffstat:

 src/http/modules/ngx_http_slice_filter_module.c |  5 +++++
 1 files changed, 5 insertions(+), 0 deletions(-)

diffs (15 lines):

diff -r fac6e1a46206 -r 32a343635b50 src/http/modules/ngx_http_slice_filter_module.c
--- a/src/http/modules/ngx_http_slice_filter_module.c	Thu Jul 09 17:33:22 2020 +0300
+++ b/src/http/modules/ngx_http_slice_filter_module.c	Thu Jul 09 16:21:37 2020 +0300
@@ -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;