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Entity tags: handling in add_header.

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Notably this allows to clear ETag if one want to for some reason.
This commit is contained in:
Maxim Dounin 2012-07-07 21:24:01 +00:00
parent c96c4196f3
commit 8b00c87c38
1 changed files with 38 additions and 0 deletions
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38
src/http/modules/ngx_http_headers_filter_module.c
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@ -57,6 +57,8 @@ static ngx_int_t ngx_http_add_header(ngx_http_request_t *r,
ngx_http_header_val_t *hv, ngx_str_t *value);
static ngx_int_t ngx_http_set_last_modified(ngx_http_request_t *r,
ngx_http_header_val_t *hv, ngx_str_t *value);
static ngx_int_t ngx_http_set_response_header(ngx_http_request_t *r,
ngx_http_header_val_t *hv, ngx_str_t *value);
static void *ngx_http_headers_create_conf(ngx_conf_t *cf);
static char *ngx_http_headers_merge_conf(ngx_conf_t *cf,
@ -74,6 +76,10 @@ static ngx_http_set_header_t ngx_http_set_headers[] = {
{ ngx_string("Last-Modified"), 0, ngx_http_set_last_modified },
{ ngx_string("ETag"),
offsetof(ngx_http_headers_out_t, etag),
ngx_http_set_response_header },
{ ngx_null_string, 0, NULL }
};
@ -392,6 +398,38 @@ ngx_http_set_last_modified(ngx_http_request_t *r, ngx_http_header_val_t *hv,
}
static ngx_int_t
ngx_http_set_response_header(ngx_http_request_t *r, ngx_http_header_val_t *hv,
ngx_str_t *value)
{
ngx_table_elt_t *h, **old;
old = (ngx_table_elt_t **) ((char *) &r->headers_out + hv->offset);
if (*old) {
(*old)->hash = 0;
*old = NULL;
}
if (value->len == 0) {
return NGX_OK;
}
h = ngx_list_push(&r->headers_out.headers);
if (h == NULL) {
return NGX_ERROR;
}
*old = h;
h->hash = 1;
h->key = hv->key;
h->value = *value;
return NGX_OK;
}
static void *
ngx_http_headers_create_conf(ngx_conf_t *cf)
{