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/*
* Copyright (C) NGINX, Inc.
*/
#include <nxt_router.h>
#include <nxt_http.h>
typedef struct {
nxt_http_status_t status;
nxt_tstr_t *location;
nxt_str_t encoded;
} nxt_http_return_conf_t;
typedef struct {
nxt_str_t location;
nxt_str_t encoded;
} nxt_http_return_ctx_t;
static nxt_http_action_t *nxt_http_return(nxt_task_t *task,
nxt_http_request_t *r, nxt_http_action_t *action);
static nxt_int_t nxt_http_return_encode(nxt_mp_t *mp, nxt_str_t *encoded,
const nxt_str_t *location);
static void nxt_http_return_send_ready(nxt_task_t *task, void *obj, void *data);
static void nxt_http_return_send_error(nxt_task_t *task, void *obj, void *data);
static const nxt_http_request_state_t nxt_http_return_send_state;
nxt_int_t
nxt_http_return_init(nxt_router_conf_t *rtcf, nxt_http_action_t *action,
nxt_http_action_conf_t *acf)
{
nxt_mp_t *mp;
nxt_str_t str;
nxt_http_return_conf_t *conf;
mp = rtcf->mem_pool;
conf = nxt_mp_zget(mp, sizeof(nxt_http_return_conf_t));
if (nxt_slow_path(conf == NULL)) {
return NXT_ERROR;
}
action->handler = nxt_http_return;
action->u.conf = conf;
conf->status = nxt_conf_get_number(acf->ret);
if (acf->location == NULL) {
return NXT_OK;
}
nxt_conf_get_string(acf->location, &str);
conf->location = nxt_tstr_compile(rtcf->tstr_state, &str, 0);
if (nxt_slow_path(conf->location == NULL)) {
return NXT_ERROR;
}
if (nxt_tstr_is_const(conf->location)) {
nxt_tstr_str(conf->location, &str);
return nxt_http_return_encode(mp, &conf->encoded, &str);
}
return NXT_OK;
}
nxt_http_action_t *
nxt_http_return(nxt_task_t *task, nxt_http_request_t *r,
nxt_http_action_t *action)
{
nxt_int_t ret;
nxt_router_conf_t *rtcf;
nxt_http_return_ctx_t *ctx;
nxt_http_return_conf_t *conf;
conf = action->u.conf;
#if (NXT_DEBUG)
nxt_str_t loc;
if (conf->location == NULL) {
nxt_str_set(&loc, "");
} else {
nxt_tstr_str(conf->location, &loc);
}
nxt_debug(task, "http return: %d (loc: \"%V\")", conf->status, &loc);
#endif
if (conf->status >= NXT_HTTP_BAD_REQUEST
&& conf->status <= NXT_HTTP_SERVER_ERROR_MAX)
{
nxt_http_request_error(task, r, conf->status);
return NULL;
}
if (conf->location == NULL) {
ctx = NULL;
} else {
ctx = nxt_mp_zget(r->mem_pool, sizeof(nxt_http_return_ctx_t));
if (nxt_slow_path(ctx == NULL)) {
goto fail;
}
}
r->status = conf->status;
r->resp.content_length_n = 0;
if (ctx == NULL || nxt_tstr_is_const(conf->location)) {
if (ctx != NULL) {
ctx->encoded = conf->encoded;
}
nxt_http_return_send_ready(task, r, ctx);
} else {
rtcf = r->conf->socket_conf->router_conf;
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)) {
goto fail;
}
nxt_tstr_query(task, r->tstr_query, conf->location, &ctx->location);
nxt_tstr_query_resolve(task, r->tstr_query, ctx,
nxt_http_return_send_ready,
nxt_http_return_send_error);
}
return NULL;
fail:
nxt_http_request_error(task, r, NXT_HTTP_INTERNAL_SERVER_ERROR);
return NULL;
}
static nxt_int_t
nxt_http_return_encode(nxt_mp_t *mp, nxt_str_t *encoded,
const nxt_str_t *location)
{
nxt_uint_t encode;
if (nxt_is_complex_uri_encoded(location->start, location->length)) {
*encoded = *location;
return NXT_OK;
}
encode = nxt_encode_complex_uri(NULL, location->start, location->length);
encoded->length = location->length + encode * 2;
encoded->start = nxt_mp_nget(mp, encoded->length);
if (nxt_slow_path(encoded->start == NULL)) {
return NXT_ERROR;
}
nxt_encode_complex_uri(encoded->start, location->start, location->length);
return NXT_OK;
}
static void
nxt_http_return_send_ready(nxt_task_t *task, void *obj, void *data)
{
nxt_int_t ret;
nxt_http_field_t *field;
nxt_http_request_t *r;
nxt_http_return_ctx_t *ctx;
r = obj;
ctx = data;
if (ctx != NULL) {
if (ctx->location.length > 0) {
ret = nxt_http_return_encode(r->mem_pool, &ctx->encoded,
&ctx->location);
if (nxt_slow_path(ret == NXT_ERROR)) {
goto fail;
}
}
field = nxt_list_zero_add(r->resp.fields);
if (nxt_slow_path(field == NULL)) {
goto fail;
}
nxt_http_field_name_set(field, "Location");
field->value = ctx->encoded.start;
field->value_length = ctx->encoded.length;
}
r->state = &nxt_http_return_send_state;
nxt_http_request_header_send(task, r, NULL, NULL);
return;
fail:
nxt_http_request_error(task, r, NXT_HTTP_INTERNAL_SERVER_ERROR);
}
static void
nxt_http_return_send_error(nxt_task_t *task, void *obj, void *data)
{
nxt_http_request_t *r;
r = obj;
nxt_http_request_error(task, r, NXT_HTTP_INTERNAL_SERVER_ERROR);
}
static const nxt_http_request_state_t nxt_http_return_send_state
nxt_aligned(64) =
{
.error_handler = nxt_http_request_error_handler,
};
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