nixpkgs/pkgs/servers/http/nginx/nix-etag-1.15.4.patch
aszlig 1f24685d93
nginx/etag-patch: Use Nix store dir from build env
So far, the Nix store directory was hardcoded and if someone uses a
different Nix store directory the patch won't work. Of course, this is
pretty uncommon, but by not only substituting the store directory but
also the length of it we also save a few calls to ngx_strlen(), which
should save us a few cycles.

Signed-off-by: aszlig <aszlig@nix.build>
2019-04-18 10:07:55 +02:00

93 lines
2.9 KiB
Diff

From f6a978f024d01202f954483423af1b2d5d5159a6 Mon Sep 17 00:00:00 2001
From: Yegor Timoshenko <yegortimoshenko@riseup.net>
Date: Fri, 28 Sep 2018 03:27:04 +0000
Subject: [PATCH] If root is in Nix store, set ETag to its path hash
---
src/http/ngx_http_core_module.c | 56 +++++++++++++++++++++++++++++----
1 file changed, 50 insertions(+), 6 deletions(-)
diff --git a/src/http/ngx_http_core_module.c b/src/http/ngx_http_core_module.c
index c57ec00c..b7992de2 100644
--- a/src/http/ngx_http_core_module.c
+++ b/src/http/ngx_http_core_module.c
@@ -1583,6 +1583,7 @@ ngx_http_set_etag(ngx_http_request_t *r)
{
ngx_table_elt_t *etag;
ngx_http_core_loc_conf_t *clcf;
+ u_char *real, *ptr1, *ptr2;
clcf = ngx_http_get_module_loc_conf(r, ngx_http_core_module);
@@ -1598,16 +1599,61 @@ ngx_http_set_etag(ngx_http_request_t *r)
etag->hash = 1;
ngx_str_set(&etag->key, "ETag");
- etag->value.data = ngx_pnalloc(r->pool, NGX_OFF_T_LEN + NGX_TIME_T_LEN + 3);
- if (etag->value.data == NULL) {
+ real = ngx_realpath(clcf->root.data, NULL);
+
+ if (real == NULL) {
etag->hash = 0;
return NGX_ERROR;
}
- etag->value.len = ngx_sprintf(etag->value.data, "\"%xT-%xO\"",
- r->headers_out.last_modified_time,
- r->headers_out.content_length_n)
- - etag->value.data;
+ #define NIX_STORE_DIR "@nixStoreDir@"
+ #define NIX_STORE_LEN @nixStoreDirLen@
+
+ if (r->headers_out.last_modified_time == 1
+ && !ngx_strncmp(real, NIX_STORE_DIR, NIX_STORE_LEN)
+ && real[NIX_STORE_LEN] == '/'
+ && real[NIX_STORE_LEN + 1] != '\0')
+ {
+ ptr1 = real + NIX_STORE_LEN;
+ *ptr1 = '"';
+
+ ptr2 = (u_char *) ngx_strchr(ptr1, '-');
+
+ if (ptr2 == NULL) {
+ ngx_free(real);
+ etag->hash = 0;
+ return NGX_ERROR;
+ }
+
+ *ptr2++ = '"';
+ *ptr2 = '\0';
+
+ etag->value.len = ngx_strlen(ptr1);
+ etag->value.data = ngx_pnalloc(r->pool, etag->value.len);
+
+ if (etag->value.data == NULL) {
+ ngx_free(real);
+ etag->hash = 0;
+ return NGX_ERROR;
+ }
+
+ ngx_memcpy(etag->value.data, ptr1, etag->value.len);
+ } else {
+ etag->value.data = ngx_pnalloc(r->pool, NGX_OFF_T_LEN + NGX_TIME_T_LEN + 3);
+
+ if (etag->value.data == NULL) {
+ ngx_free(real);
+ etag->hash = 0;
+ return NGX_ERROR;
+ }
+
+ etag->value.len = ngx_sprintf(etag->value.data, "\"%xT-%xO\"",
+ r->headers_out.last_modified_time,
+ r->headers_out.content_length_n)
+ - etag->value.data;
+ }
+
+ ngx_free(real);
r->headers_out.etag = etag;
--
2.19.0