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Headers filter: "add_header" with "always" parameter (ticket #98).

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If specified, the header field is set regardless of the status code.
This commit is contained in:
Sergey Kandaurov 2014-08-29 18:00:10 +04:00
parent 31c35adfe1
commit 967c51c9ff
1 changed files with 41 additions and 13 deletions
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54
src/http/modules/ngx_http_headers_filter_module.c
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@ -28,6 +28,7 @@ struct ngx_http_header_val_s {
ngx_str_t key;
ngx_http_set_header_pt handler;
ngx_uint_t offset;
ngx_uint_t always; /* unsigned always:1 */
};
@ -98,7 +99,7 @@ static ngx_command_t ngx_http_headers_filter_commands[] = {
{ ngx_string("add_header"),
NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_HTTP_LIF_CONF
|NGX_CONF_TAKE2,
|NGX_CONF_TAKE23,
ngx_http_headers_add,
NGX_HTTP_LOC_CONF_OFFSET,
0,
@ -146,28 +147,38 @@ static ngx_int_t
ngx_http_headers_filter(ngx_http_request_t *r)
{
ngx_str_t value;
ngx_uint_t i;
ngx_uint_t i, safe_status;
ngx_http_header_val_t *h;
ngx_http_headers_conf_t *conf;
conf = ngx_http_get_module_loc_conf(r, ngx_http_headers_filter_module);
if ((conf->expires == NGX_HTTP_EXPIRES_OFF && conf->headers == NULL)
|| r != r->main
|| (r->headers_out.status != NGX_HTTP_OK
&& r->headers_out.status != NGX_HTTP_CREATED
&& r->headers_out.status != NGX_HTTP_NO_CONTENT
&& r->headers_out.status != NGX_HTTP_PARTIAL_CONTENT
&& r->headers_out.status != NGX_HTTP_MOVED_PERMANENTLY
&& r->headers_out.status != NGX_HTTP_MOVED_TEMPORARILY
&& r->headers_out.status != NGX_HTTP_SEE_OTHER
&& r->headers_out.status != NGX_HTTP_NOT_MODIFIED
&& r->headers_out.status != NGX_HTTP_TEMPORARY_REDIRECT))
|| r != r->main)
{
return ngx_http_next_header_filter(r);
}
if (conf->expires != NGX_HTTP_EXPIRES_OFF) {
switch (r->headers_out.status) {
case NGX_HTTP_OK:
case NGX_HTTP_CREATED:
case NGX_HTTP_NO_CONTENT:
case NGX_HTTP_PARTIAL_CONTENT:
case NGX_HTTP_MOVED_PERMANENTLY:
case NGX_HTTP_MOVED_TEMPORARILY:
case NGX_HTTP_SEE_OTHER:
case NGX_HTTP_NOT_MODIFIED:
case NGX_HTTP_TEMPORARY_REDIRECT:
safe_status = 1;
break;
default:
safe_status = 0;
break;
}
if (conf->expires != NGX_HTTP_EXPIRES_OFF && safe_status) {
if (ngx_http_set_expires(r, conf) != NGX_OK) {
return NGX_ERROR;
}
@ -177,6 +188,10 @@ ngx_http_headers_filter(ngx_http_request_t *r)
h = conf->headers->elts;
for (i = 0; i < conf->headers->nelts; i++) {
if (!safe_status && !h[i].always) {
continue;
}
if (ngx_http_complex_value(r, &h[i].value, &value) != NGX_OK) {
return NGX_ERROR;
}
@ -603,6 +618,7 @@ ngx_http_headers_add(ngx_conf_t *cf, ngx_command_t *cmd, void *conf)
hv->key = value[1];
hv->handler = ngx_http_add_header;
hv->offset = 0;
hv->always = 0;
set = ngx_http_set_headers;
for (i = 0; set[i].name.len; i++) {
@ -631,5 +647,17 @@ ngx_http_headers_add(ngx_conf_t *cf, ngx_command_t *cmd, void *conf)
return NGX_CONF_ERROR;
}
if (cf->args->nelts == 3) {
return NGX_CONF_OK;
}
if (ngx_strcmp(value[3].data, "always") != 0) {
ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
"invalid parameter \"%V\"", &value[3]);
return NGX_CONF_ERROR;
}
hv->always = 1;
return NGX_CONF_OK;
}