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Entity tags: the "etag" directive.

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It allows to disable generation of nginx's own entity tags, while
still handling ETags in cache properly.  This may be useful e.g.
if one want to serve static files from servers with different ETag
generation algorithms.
This commit is contained in:
Maxim Dounin 2012-07-09 14:53:42 +00:00
parent eb7c38a49a
commit 1b77858ac5
2 changed files with 18 additions and 1 deletions
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18
src/http/ngx_http_core_module.c
View File

@ -650,6 +650,13 @@ static ngx_command_t ngx_http_core_commands[] = {
offsetof(ngx_http_core_loc_conf_t, chunked_transfer_encoding),
NULL },
{ ngx_string("etag"),
NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_FLAG,
ngx_conf_set_flag_slot,
NGX_HTTP_LOC_CONF_OFFSET,
offsetof(ngx_http_core_loc_conf_t, etag),
NULL },
{ ngx_string("error_page"),
NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_HTTP_LIF_CONF
|NGX_CONF_2MORE,
@ -1811,7 +1818,14 @@ ngx_http_set_exten(ngx_http_request_t *r)
ngx_int_t
ngx_http_set_etag(ngx_http_request_t *r)
{
ngx_table_elt_t *etag;
ngx_table_elt_t *etag;
ngx_http_core_loc_conf_t *clcf;
clcf = ngx_http_get_module_loc_conf(r, ngx_http_core_module);
if (!clcf->etag) {
return NGX_OK;
}
etag = ngx_list_push(&r->headers_out.headers);
if (etag == NULL) {
@ -3539,6 +3553,7 @@ ngx_http_core_create_loc_conf(ngx_conf_t *cf)
clcf->recursive_error_pages = NGX_CONF_UNSET;
clcf->server_tokens = NGX_CONF_UNSET;
clcf->chunked_transfer_encoding = NGX_CONF_UNSET;
clcf->etag = NGX_CONF_UNSET;
clcf->types_hash_max_size = NGX_CONF_UNSET_UINT;
clcf->types_hash_bucket_size = NGX_CONF_UNSET_UINT;
@ -3800,6 +3815,7 @@ ngx_http_core_merge_loc_conf(ngx_conf_t *cf, void *parent, void *child)
ngx_conf_merge_value(conf->server_tokens, prev->server_tokens, 1);
ngx_conf_merge_value(conf->chunked_transfer_encoding,
prev->chunked_transfer_encoding, 1);
ngx_conf_merge_value(conf->etag, prev->etag, 1);
ngx_conf_merge_ptr_value(conf->open_file_cache,
prev->open_file_cache, NULL);

1
src/http/ngx_http_core_module.h
View File

@ -392,6 +392,7 @@ struct ngx_http_core_loc_conf_s {
ngx_flag_t recursive_error_pages; /* recursive_error_pages */
ngx_flag_t server_tokens; /* server_tokens */
ngx_flag_t chunked_transfer_encoding; /* chunked_transfer_encoding */
ngx_flag_t etag; /* etag */
#if (NGX_HTTP_GZIP)
ngx_flag_t gzip_vary; /* gzip_vary */