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/*
* Copyright (C) Zhidao HONG
* Copyright (C) NGINX, Inc.
*/
#include <nxt_router.h>
#include <nxt_http.h>
typedef struct {
nxt_str_t name;
nxt_tstr_t *value;
} nxt_http_header_val_t;
nxt_int_t
nxt_http_set_headers_init(nxt_router_conf_t *rtcf, nxt_http_action_t *action,
nxt_http_action_conf_t *acf)
{
uint32_t next;
nxt_str_t str, name;
nxt_array_t *headers;
nxt_conf_value_t *value;
nxt_http_header_val_t *hv;
headers = nxt_array_create(rtcf->mem_pool, 4,
sizeof(nxt_http_header_val_t));
if (nxt_slow_path(headers == NULL)) {
return NXT_ERROR;
}
action->set_headers = headers;
next = 0;
for ( ;; ) {
value = nxt_conf_next_object_member(acf->set_headers, &name, &next);
if (value == NULL) {
break;
}
hv = nxt_array_zero_add(headers);
if (nxt_slow_path(hv == NULL)) {
return NXT_ERROR;
}
hv->name.length = name.length;
hv->name.start = nxt_mp_nget(rtcf->mem_pool, name.length);
if (nxt_slow_path(hv->name.start == NULL)) {
return NXT_ERROR;
}
nxt_memcpy(hv->name.start, name.start, name.length);
if (nxt_conf_type(value) == NXT_CONF_STRING) {
nxt_conf_get_string(value, &str);
hv->value = nxt_tstr_compile(rtcf->tstr_state, &str, 0);
if (nxt_slow_path(hv->value == NULL)) {
return NXT_ERROR;
}
}
}
return NXT_OK;
}
static nxt_http_field_t *
nxt_http_resp_header_find(nxt_http_request_t *r, u_char *name, size_t length)
{
nxt_http_field_t *f;
nxt_list_each(f, r->resp.fields) {
if (f->skip) {
continue;
}
if (length == f->name_length
&& nxt_memcasecmp(name, f->name, f->name_length) == 0)
{
return f;
}
} nxt_list_loop;
return NULL;
}
nxt_int_t
nxt_http_set_headers(nxt_http_request_t *r)
{
nxt_int_t ret;
nxt_uint_t i, n;
nxt_str_t *value;
nxt_http_field_t *f;
nxt_router_conf_t *rtcf;
nxt_http_action_t *action;
nxt_http_header_val_t *hv, *header;
action = r->action;
if (action == NULL || action->set_headers == NULL) {
return NXT_OK;
}
if ((r->status < NXT_HTTP_OK || r->status >= NXT_HTTP_BAD_REQUEST)) {
return NXT_OK;
}
rtcf = r->conf->socket_conf->router_conf;
header = action->set_headers->elts;
n = action->set_headers->nelts;
value = nxt_mp_zalloc(r->mem_pool, sizeof(nxt_str_t) * n);
if (nxt_slow_path(value == NULL)) {
return NXT_ERROR;
}
for (i = 0; i < n; i++) {
hv = &header[i];
if (hv->value == NULL) {
continue;
}
if (nxt_tstr_is_const(hv->value)) {
nxt_tstr_str(hv->value, &value[i]);
} else {
ret = nxt_tstr_query_init(&r->tstr_query, rtcf->tstr_state,
&r->tstr_cache, r, r->mem_pool);
if (nxt_slow_path(ret != NXT_OK)) {
return NXT_ERROR;
}
nxt_tstr_query(&r->task, r->tstr_query, hv->value, &value[i]);
if (nxt_slow_path(nxt_tstr_query_failed(r->tstr_query))) {
return NXT_ERROR;
}
}
}
for (i = 0; i < n; i++) {
hv = &header[i];
f = nxt_http_resp_header_find(r, hv->name.start, hv->name.length);
if (value[i].start != NULL) {
if (f == NULL) {
f = nxt_list_zero_add(r->resp.fields);
if (nxt_slow_path(f == NULL)) {
return NXT_ERROR;
}
f->name = hv->name.start;
f->name_length = hv->name.length;
}
f->value = value[i].start;
f->value_length = value[i].length;
} else if (f != NULL) {
f->skip = 1;
}
}
return NXT_OK;
}
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