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/*
* Copyright (C) Alejandro Colomar
* Copyright (C) NGINX, Inc.
*/
#include "nxt_http_compress.h"
#include <errno.h>
#include <stddef.h>
#include <nxt_unit_cdefs.h>
#include "nxt_clang.h"
#include "nxt_conf.h"
#include "nxt_errno.h"
#include "nxt_http.h"
#include "nxt_http_compress_gzip.h"
#include "nxt_list.h"
#include "nxt_main.h"
#include "nxt_mp.h"
#include "nxt_router.h"
#include "nxt_string.h"
#include "nxt_tstr.h"
#include "nxt_types.h"
#define NXT_DEFAULT_COMPRESSION (-1)
static nxt_conf_map_t nxt_http_compress_conf[] = {
{
nxt_string("encoding"),
NXT_CONF_MAP_STR,
offsetof(nxt_http_compress_conf_t, encoding),
},
{
nxt_string("level"),
NXT_CONF_MAP_INT8,
offsetof(nxt_http_compress_conf_t, level),
},
{
nxt_string("min_length"),
NXT_CONF_MAP_SIZE,
offsetof(nxt_http_compress_conf_t, min_len),
},
{
nxt_string("mime_types"),
NXT_CONF_MAP_PTR,
offsetof(nxt_http_compress_conf_t, mtypes),
},
};
nxt_int_t
nxt_http_compress_init(nxt_task_t *task, nxt_router_conf_t *rtcf,
nxt_http_action_t *action, nxt_http_action_conf_t *acf)
{
nxt_mp_t *mp;
nxt_int_t ret;
nxt_http_compress_conf_t *conf;
static nxt_str_t hdr_a_e = nxt_string("$header_accept_encoding");
mp = rtcf->mem_pool;
conf = nxt_mp_zget(mp, sizeof(nxt_http_compress_conf_t));
if (nxt_slow_path(conf == NULL)) {
return NXT_ERROR;
}
conf->level = NXT_DEFAULT_COMPRESSION;
conf->min_len = 20;
ret = nxt_conf_map_object(mp, acf->compress, nxt_http_compress_conf,
nxt_nitems(nxt_http_compress_conf), conf);
if (nxt_slow_path(ret == NXT_ERROR)) {
return NXT_ERROR;
}
if (conf->mtypes != NULL) {
conf->mtrule = nxt_http_route_types_rule_create(task, mp, conf->mtypes);
if (nxt_slow_path(conf->mtrule == NULL)) {
return NXT_ERROR;
}
}
conf->accept_encoding = nxt_tstr_compile(rtcf->tstr_state, &hdr_a_e, 0);
if (nxt_slow_path(conf->accept_encoding == NULL)) {
return NXT_ERROR;
}
if (NXT_WITH_ZLIB && nxt_str_eq(&conf->encoding, "gzip", strlen("gzip"))) {
conf->handler = nxt_http_compress_gzip;
} else {
return NXT_ERROR;
}
action->compress = conf;
return NXT_OK;
}
nxt_int_t
nxt_http_compress_append_field(nxt_task_t *task, nxt_http_request_t *r,
nxt_str_t *field, nxt_str_t *value)
{
nxt_http_field_t *f;
f = nxt_list_add(r->resp.fields);
if (nxt_slow_path(f == NULL)) {
return NXT_ERROR;
}
f->hash = 0;
f->skip = 0;
f->hopbyhop = 0;
f->name_length = field->length;
f->value_length = value->length;
f->name = field->start;
f->value = value->start;
return NXT_OK;
}
ssize_t
nxt_http_compress_resp_content_length(nxt_http_response_t *resp)
{
size_t cl;
nxt_str_t str;
if (resp->content_length_n != -1) {
return resp->content_length_n;
}
if (resp->content_length == NULL) {
return -1;
}
str.length = resp->content_length->value_length;
str.start = resp->content_length->value;
errno = 0;
cl = nxt_atoul(&str);
if (errno != 0) {
return -1;
}
return cl;
}
nxt_int_t
nxt_http_compress_accept_encoding(nxt_task_t *task, nxt_http_request_t *r,
nxt_tstr_t *accept_encoding, nxt_str_t *encoding)
{
nxt_int_t ret;
nxt_str_t str;
nxt_router_conf_t *rtcf;
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_ERROR)) {
return NXT_ERROR;
}
nxt_tstr_query(task, r->tstr_query, accept_encoding, &str);
if (nxt_slow_path(nxt_tstr_query_failed(r->tstr_query))) {
return NXT_ERROR;
}
return nxt_strstr_eq(&str, encoding);
}
nxt_int_t
nxt_http_compressible_mtype(nxt_task_t *task, nxt_http_request_t *r,
nxt_http_route_rule_t *mtrule)
{
const nxt_str_t *type;
static nxt_str_t unknown_mtype = nxt_string("");
if (mtrule == NULL) {
return 1;
}
type = r->resp.mtype;
if (type == NULL) {
type = &unknown_mtype;
}
return nxt_http_route_test_rule(r, mtrule, type->start, type->length);
}
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