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ngx_http_lua_util.c
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ngx_http_lua_util.c
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/*
* Copyright (C) Xiaozhe Wang (chaoslawful)
* Copyright (C) Yichun Zhang (agentzh)
*/
#ifndef DDEBUG
#define DDEBUG 0
#endif
#include "ddebug.h"
#include "nginx.h"
#include "ngx_http_lua_directive.h"
#include "ngx_http_lua_util.h"
#include "ngx_http_lua_exception.h"
#include "ngx_http_lua_pcrefix.h"
#include "ngx_http_lua_args.h"
#include "ngx_http_lua_uri.h"
#include "ngx_http_lua_req_body.h"
#include "ngx_http_lua_headers.h"
#include "ngx_http_lua_output.h"
#include "ngx_http_lua_control.h"
#include "ngx_http_lua_ndk.h"
#include "ngx_http_lua_subrequest.h"
#include "ngx_http_lua_log.h"
#include "ngx_http_lua_string.h"
#include "ngx_http_lua_misc.h"
#include "ngx_http_lua_consts.h"
#include "ngx_http_lua_shdict.h"
#include "ngx_http_lua_coroutine.h"
#include "ngx_http_lua_socket_tcp.h"
#include "ngx_http_lua_socket_udp.h"
#include "ngx_http_lua_sleep.h"
#include "ngx_http_lua_setby.h"
#include "ngx_http_lua_headerfilterby.h"
#include "ngx_http_lua_bodyfilterby.h"
#include "ngx_http_lua_logby.h"
#include "ngx_http_lua_probe.h"
#include "ngx_http_lua_uthread.h"
#include "ngx_http_lua_contentby.h"
#include "ngx_http_lua_timer.h"
#include "ngx_http_lua_config.h"
#include "ngx_http_lua_socket_tcp.h"
#include "ngx_http_lua_ssl_certby.h"
#include "ngx_http_lua_ssl.h"
#include "ngx_http_lua_log_ringbuf.h"
#if 1
#undef ngx_http_lua_probe_info
#define ngx_http_lua_probe_info(msg)
#endif
#ifndef NGX_HTTP_LUA_BT_DEPTH
#define NGX_HTTP_LUA_BT_DEPTH 22
#endif
#ifndef NGX_HTTP_LUA_BT_MAX_COROS
#define NGX_HTTP_LUA_BT_MAX_COROS 5
#endif
#if (NGX_HTTP_LUA_HAVE_SA_RESTART)
#define NGX_HTTP_LUA_SA_RESTART_SIGS { \
ngx_signal_value(NGX_RECONFIGURE_SIGNAL), \
ngx_signal_value(NGX_REOPEN_SIGNAL), \
ngx_signal_value(NGX_NOACCEPT_SIGNAL), \
ngx_signal_value(NGX_TERMINATE_SIGNAL), \
ngx_signal_value(NGX_SHUTDOWN_SIGNAL), \
ngx_signal_value(NGX_CHANGEBIN_SIGNAL), \
SIGALRM, \
SIGINT, \
SIGIO, \
SIGCHLD, \
SIGSYS, \
SIGPIPE, \
0 \
};
#endif
char ngx_http_lua_code_cache_key;
char ngx_http_lua_socket_pool_key;
char ngx_http_lua_coroutines_key;
char ngx_http_lua_headers_metatable_key;
ngx_uint_t ngx_http_lua_location_hash = 0;
ngx_uint_t ngx_http_lua_content_length_hash = 0;
static ngx_int_t ngx_http_lua_send_http10_headers(ngx_http_request_t *r,
ngx_http_lua_ctx_t *ctx);
static void ngx_http_lua_init_registry(lua_State *L, ngx_log_t *log);
static void ngx_http_lua_init_globals(lua_State *L, ngx_cycle_t *cycle,
ngx_http_lua_main_conf_t *lmcf, ngx_log_t *log);
#ifdef OPENRESTY_LUAJIT
static void ngx_http_lua_inject_global_write_guard(lua_State *L,
ngx_log_t *log);
#endif
static void ngx_http_lua_set_path(ngx_cycle_t *cycle, lua_State *L, int tab_idx,
const char *fieldname, const char *path, const char *default_path,
ngx_log_t *log);
static ngx_int_t ngx_http_lua_handle_exec(lua_State *L, ngx_http_request_t *r,
ngx_http_lua_ctx_t *ctx);
static ngx_int_t ngx_http_lua_handle_exit(lua_State *L, ngx_http_request_t *r,
ngx_http_lua_ctx_t *ctx);
static ngx_int_t ngx_http_lua_handle_rewrite_jump(lua_State *L,
ngx_http_request_t *r, ngx_http_lua_ctx_t *ctx);
static int ngx_http_lua_thread_traceback(lua_State *L, lua_State *co,
ngx_http_lua_co_ctx_t *coctx);
static void ngx_http_lua_inject_ngx_api(lua_State *L,
ngx_http_lua_main_conf_t *lmcf, ngx_log_t *log);
static void ngx_http_lua_inject_arg_api(lua_State *L);
static int ngx_http_lua_param_get(lua_State *L);
static int ngx_http_lua_param_set(lua_State *L);
static ngx_int_t ngx_http_lua_output_filter(ngx_http_request_t *r,
ngx_chain_t *in);
static ngx_int_t ngx_http_lua_send_special(ngx_http_request_t *r,
ngx_uint_t flags);
static void ngx_http_lua_finalize_threads(ngx_http_request_t *r,
ngx_http_lua_ctx_t *ctx, lua_State *L);
static ngx_int_t ngx_http_lua_post_zombie_thread(ngx_http_request_t *r,
ngx_http_lua_co_ctx_t *parent, ngx_http_lua_co_ctx_t *thread);
static void ngx_http_lua_cleanup_zombie_child_uthreads(ngx_http_request_t *r,
lua_State *L, ngx_http_lua_ctx_t *ctx, ngx_http_lua_co_ctx_t *coctx);
static ngx_int_t ngx_http_lua_on_abort_resume(ngx_http_request_t *r);
static void ngx_http_lua_close_fake_request(ngx_http_request_t *r);
static ngx_int_t ngx_http_lua_flush_pending_output(ngx_http_request_t *r,
ngx_http_lua_ctx_t *ctx);
static ngx_int_t
ngx_http_lua_process_flushing_coroutines(ngx_http_request_t *r,
ngx_http_lua_ctx_t *ctx);
static lua_State *ngx_http_lua_new_state(lua_State *parent_vm,
ngx_cycle_t *cycle, ngx_http_lua_main_conf_t *lmcf, ngx_log_t *log);
static int ngx_http_lua_get_raw_phase_context(lua_State *L);
#ifndef LUA_PATH_SEP
#define LUA_PATH_SEP ";"
#endif
#if !defined(LUA_DEFAULT_PATH) && (NGX_DEBUG)
#define LUA_DEFAULT_PATH "../lua-resty-core/lib/?.lua;" \
"../lua-resty-lrucache/lib/?.lua"
#endif
#define AUX_MARK "\1"
static void
ngx_http_lua_set_path(ngx_cycle_t *cycle, lua_State *L, int tab_idx,
const char *fieldname, const char *path, const char *default_path,
ngx_log_t *log)
{
const char *tmp_path;
const char *prefix;
/* XXX here we use some hack to simplify string manipulation */
tmp_path = luaL_gsub(L, path, LUA_PATH_SEP LUA_PATH_SEP,
LUA_PATH_SEP AUX_MARK LUA_PATH_SEP);
lua_pushlstring(L, (char *) cycle->prefix.data, cycle->prefix.len);
prefix = lua_tostring(L, -1);
tmp_path = luaL_gsub(L, tmp_path, "$prefix", prefix);
tmp_path = luaL_gsub(L, tmp_path, "${prefix}", prefix);
lua_pop(L, 3);
dd("tmp_path path: %s", tmp_path);
#if (NGX_DEBUG)
tmp_path =
#else
(void)
#endif
luaL_gsub(L, tmp_path, AUX_MARK, default_path);
#if (NGX_DEBUG)
ngx_log_debug2(NGX_LOG_DEBUG_HTTP, log, 0,
"lua setting lua package.%s to \"%s\"", fieldname, tmp_path);
#endif
lua_remove(L, -2);
/* fix negative index as there's new data on stack */
tab_idx = (tab_idx < 0) ? (tab_idx - 1) : tab_idx;
lua_setfield(L, tab_idx, fieldname);
}
#ifndef OPENRESTY_LUAJIT
/**
* Create new table and set _G field to itself.
*
* After:
* | new table | <- top
* | ... |
* */
void
ngx_http_lua_create_new_globals_table(lua_State *L, int narr, int nrec)
{
lua_createtable(L, narr, nrec + 1);
lua_pushvalue(L, -1);
lua_setfield(L, -2, "_G");
}
#endif /* OPENRESTY_LUAJIT */
static lua_State *
ngx_http_lua_new_state(lua_State *parent_vm, ngx_cycle_t *cycle,
ngx_http_lua_main_conf_t *lmcf, ngx_log_t *log)
{
lua_State *L;
const char *old_path;
const char *new_path;
size_t old_path_len;
const char *old_cpath;
const char *new_cpath;
size_t old_cpath_len;
ngx_log_debug0(NGX_LOG_DEBUG_HTTP, log, 0, "lua creating new vm state");
L = luaL_newstate();
if (L == NULL) {
return NULL;
}
luaL_openlibs(L);
lua_getglobal(L, "package");
if (!lua_istable(L, -1)) {
ngx_log_error(NGX_LOG_EMERG, log, 0,
"the \"package\" table does not exist");
return NULL;
}
if (parent_vm) {
lua_getglobal(parent_vm, "package");
lua_getfield(parent_vm, -1, "path");
old_path = lua_tolstring(parent_vm, -1, &old_path_len);
lua_pop(parent_vm, 1);
lua_pushlstring(L, old_path, old_path_len);
lua_setfield(L, -2, "path");
lua_getfield(parent_vm, -1, "cpath");
old_path = lua_tolstring(parent_vm, -1, &old_path_len);
lua_pop(parent_vm, 2);
lua_pushlstring(L, old_path, old_path_len);
lua_setfield(L, -2, "cpath");
} else {
#ifdef LUA_DEFAULT_PATH
# define LUA_DEFAULT_PATH_LEN (sizeof(LUA_DEFAULT_PATH) - 1)
ngx_log_debug1(NGX_LOG_DEBUG_HTTP, log, 0,
"lua prepending default package.path with %s",
LUA_DEFAULT_PATH);
lua_pushliteral(L, LUA_DEFAULT_PATH ";"); /* package default */
lua_getfield(L, -2, "path"); /* package default old */
lua_concat(L, 2); /* package new */
lua_setfield(L, -2, "path"); /* package */
#endif
#ifdef LUA_DEFAULT_CPATH
# define LUA_DEFAULT_CPATH_LEN (sizeof(LUA_DEFAULT_CPATH) - 1)
ngx_log_debug1(NGX_LOG_DEBUG_HTTP, log, 0,
"lua prepending default package.cpath with %s",
LUA_DEFAULT_CPATH);
lua_pushliteral(L, LUA_DEFAULT_CPATH ";"); /* package default */
lua_getfield(L, -2, "cpath"); /* package default old */
old_cpath = lua_tolstring(L, -1, &old_cpath_len);
lua_concat(L, 2); /* package new */
lua_setfield(L, -2, "cpath"); /* package */
#endif
if (lmcf->lua_path.len != 0) {
lua_getfield(L, -1, "path"); /* get original package.path */
old_path = lua_tolstring(L, -1, &old_path_len);
dd("old path: %s", old_path);
lua_pushlstring(L, (char *) lmcf->lua_path.data,
lmcf->lua_path.len);
new_path = lua_tostring(L, -1);
ngx_http_lua_set_path(cycle, L, -3, "path", new_path, old_path,
log);
lua_pop(L, 2);
}
if (lmcf->lua_cpath.len != 0) {
lua_getfield(L, -1, "cpath"); /* get original package.cpath */
old_cpath = lua_tolstring(L, -1, &old_cpath_len);
dd("old cpath: %s", old_cpath);
lua_pushlstring(L, (char *) lmcf->lua_cpath.data,
lmcf->lua_cpath.len);
new_cpath = lua_tostring(L, -1);
ngx_http_lua_set_path(cycle, L, -3, "cpath", new_cpath, old_cpath,
log);
lua_pop(L, 2);
}
}
lua_pop(L, 1); /* remove the "package" table */
ngx_http_lua_init_registry(L, log);
ngx_http_lua_init_globals(L, cycle, lmcf, log);
return L;
}
lua_State *
ngx_http_lua_new_thread(ngx_http_request_t *r, lua_State *L, int *ref)
{
int base;
lua_State *co;
#ifdef HAVE_LUA_RESETTHREAD
ngx_queue_t *q;
ngx_http_lua_main_conf_t *lmcf;
ngx_http_lua_thread_ref_t *tref;
ngx_log_debug0(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
"lua creating new thread");
lmcf = ngx_http_get_module_main_conf(r, ngx_http_lua_module);
if (L == lmcf->lua && !ngx_queue_empty(&lmcf->cached_lua_threads)) {
q = ngx_queue_head(&lmcf->cached_lua_threads);
tref = ngx_queue_data(q, ngx_http_lua_thread_ref_t, queue);
ngx_http_lua_assert(tref->ref != LUA_NOREF);
ngx_http_lua_assert(tref->co != NULL);
co = tref->co;
*ref = tref->ref;
tref->co = NULL;
tref->ref = LUA_NOREF;
ngx_queue_remove(q);
ngx_queue_insert_head(&lmcf->free_lua_threads, q);
ngx_log_debug2(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
"lua reusing cached lua thread %p (ref %d)", co, *ref);
#if 0
{
int n = 0;
lua_pushlightuserdata(L, ngx_http_lua_lightudata_mask(
coroutines_key));
lua_rawget(L, LUA_REGISTRYINDEX);
lua_pushnil(L); /* first key */
while (lua_next(L, -2) != 0) {
if (!lua_isnil(L, -1) && !lua_isnil(L, -2)) {
n++;
}
lua_pop(L, 1);
}
lua_pop(L, 1);
ngx_log_debug3(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
"! lua reusing cached lua thread %p (ref %d, n %d)",
co, *ref, n);
}
#endif
} else {
#else
{
#endif
base = lua_gettop(L);
lua_pushlightuserdata(L, ngx_http_lua_lightudata_mask(
coroutines_key));
lua_rawget(L, LUA_REGISTRYINDEX);
co = lua_newthread(L);
#ifndef OPENRESTY_LUAJIT
/* {{{ inherit coroutine's globals to main thread's globals table
* for print() function will try to find tostring() in current
* globals table.
*/
/* new globals table for coroutine */
ngx_http_lua_create_new_globals_table(co, 0, 0);
lua_createtable(co, 0, 1);
ngx_http_lua_get_globals_table(co);
lua_setfield(co, -2, "__index");
lua_setmetatable(co, -2);
ngx_http_lua_set_globals_table(co);
/* }}} */
#endif /* OPENRESTY_LUAJIT */
*ref = luaL_ref(L, -2);
ngx_log_debug2(NGX_LOG_DEBUG_HTTP,
ngx_cycle->log, 0, "lua ref lua thread %p (ref %d)", co,
*ref);
if (*ref == LUA_NOREF) {
lua_settop(L, base); /* restore main thread stack */
return NULL;
}
lua_settop(L, base);
}
return co;
}
void
ngx_http_lua_del_thread(ngx_http_request_t *r, lua_State *L,
ngx_http_lua_ctx_t *ctx, ngx_http_lua_co_ctx_t *coctx)
{
#ifdef HAVE_LUA_RESETTHREAD
ngx_queue_t *q;
ngx_http_lua_main_conf_t *lmcf;
ngx_http_lua_thread_ref_t *tref;
#endif
if (coctx->co_ref == LUA_NOREF) {
return;
}
ngx_log_debug2(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
"lua deleting light thread %p (ref %d)", coctx->co,
coctx->co_ref);
ngx_http_lua_probe_thread_delete(r, coctx->co, ctx);
#ifdef HAVE_LUA_RESETTHREAD
lmcf = ngx_http_get_module_main_conf(r, ngx_http_lua_module);
if (ctx != NULL
&& coctx->co == ctx->entry_co_ctx.co
&& L == lmcf->lua && !ngx_queue_empty(&lmcf->free_lua_threads))
{
lua_resetthread(L, coctx->co);
q = ngx_queue_head(&lmcf->free_lua_threads);
tref = ngx_queue_data(q, ngx_http_lua_thread_ref_t, queue);
ngx_http_lua_assert(tref->ref == LUA_NOREF);
ngx_http_lua_assert(tref->co == NULL);
tref->ref = coctx->co_ref;
tref->co = coctx->co;
ngx_queue_remove(q);
ngx_queue_insert_head(&lmcf->cached_lua_threads, q);
ngx_log_debug2(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
"lua caching unused lua thread %p (ref %d)", coctx->co,
coctx->co_ref);
} else {
#endif
ngx_log_debug2(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
"http lua unref thread %p: %d", coctx->co,
coctx->co_ref);
lua_pushlightuserdata(L, ngx_http_lua_lightudata_mask(
coroutines_key));
lua_rawget(L, LUA_REGISTRYINDEX);
luaL_unref(L, -1, coctx->co_ref);
lua_pop(L, 1);
#ifdef HAVE_LUA_RESETTHREAD
}
#endif
coctx->co_ref = LUA_NOREF;
coctx->co_status = NGX_HTTP_LUA_CO_DEAD;
}
u_char *
ngx_http_lua_rebase_path(ngx_pool_t *pool, u_char *src, size_t len)
{
u_char *p;
ngx_str_t dst;
dst.data = ngx_palloc(pool, len + 1);
if (dst.data == NULL) {
return NULL;
}
dst.len = len;
p = ngx_copy(dst.data, src, len);
*p = '\0';
if (ngx_get_full_name(pool, (ngx_str_t *) &ngx_cycle->prefix, &dst)
!= NGX_OK)
{
return NULL;
}
return dst.data;
}
ngx_int_t
ngx_http_lua_send_header_if_needed(ngx_http_request_t *r,
ngx_http_lua_ctx_t *ctx)
{
ngx_int_t rc;
dd("send header if needed: %d", r->header_sent || ctx->header_sent);
if (!r->header_sent && !ctx->header_sent) {
if (r->headers_out.status == 0) {
r->headers_out.status = NGX_HTTP_OK;
}
if (!ctx->mime_set
&& ngx_http_lua_set_content_type(r, ctx) != NGX_OK)
{
return NGX_ERROR;
}
if (!ctx->headers_set) {
ngx_http_clear_content_length(r);
ngx_http_clear_accept_ranges(r);
}
if (!ctx->buffering) {
dd("sending headers");
rc = ngx_http_send_header(r);
ctx->header_sent = 1;
return rc;
}
}
return NGX_OK;
}
ngx_int_t
ngx_http_lua_send_chain_link(ngx_http_request_t *r, ngx_http_lua_ctx_t *ctx,
ngx_chain_t *in)
{
ngx_int_t rc;
ngx_chain_t *cl;
ngx_chain_t **ll;
ngx_http_lua_loc_conf_t *llcf;
#if 1
if (ctx->acquired_raw_req_socket || ctx->eof) {
dd("ctx->eof already set or raw req socket already acquired");
return NGX_OK;
}
#endif
if ((r->method & NGX_HTTP_HEAD) && !r->header_only) {
r->header_only = 1;
}
llcf = ngx_http_get_module_loc_conf(r, ngx_http_lua_module);
if (llcf->http10_buffering
&& !ctx->buffering
&& !r->header_sent
&& !ctx->header_sent
&& r->http_version < NGX_HTTP_VERSION_11
&& r->headers_out.content_length_n < 0)
{
ctx->buffering = 1;
}
rc = ngx_http_lua_send_header_if_needed(r, ctx);
if (rc == NGX_ERROR || rc > NGX_OK) {
return rc;
}
if (r->header_only) {
ctx->eof = 1;
if (ctx->buffering) {
return ngx_http_lua_send_http10_headers(r, ctx);
}
return rc;
}
if (in == NULL) {
dd("last buf to be sent");
#if 1
if (!r->request_body && r == r->main) {
if (ngx_http_discard_request_body(r) != NGX_OK) {
return NGX_ERROR;
}
}
#endif
if (ctx->buffering) {
rc = ngx_http_lua_send_http10_headers(r, ctx);
if (rc == NGX_ERROR || rc >= NGX_HTTP_SPECIAL_RESPONSE) {
return rc;
}
if (ctx->out) {
rc = ngx_http_lua_output_filter(r, ctx->out);
if (rc == NGX_ERROR || rc >= NGX_HTTP_SPECIAL_RESPONSE) {
return rc;
}
ctx->out = NULL;
}
}
ctx->eof = 1;
ngx_log_debug0(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
"lua sending last buf of the response body");
rc = ngx_http_lua_send_special(r, NGX_HTTP_LAST);
if (rc == NGX_ERROR || rc >= NGX_HTTP_SPECIAL_RESPONSE) {
return rc;
}
return NGX_OK;
}
/* in != NULL */
if (ctx->buffering) {
ngx_log_debug0(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
"lua buffering output bufs for the HTTP 1.0 request");
for (cl = ctx->out, ll = &ctx->out; cl; cl = cl->next) {
ll = &cl->next;
}
*ll = in;
return NGX_OK;
}
return ngx_http_lua_output_filter(r, in);
}
static ngx_int_t
ngx_http_lua_send_special(ngx_http_request_t *r, ngx_uint_t flags)
{
ngx_int_t rc;
ngx_http_request_t *ar; /* active request */
ar = r->connection->data;
if (ar != r) {
/* bypass ngx_http_postpone_filter_module */
r->connection->data = r;
rc = ngx_http_send_special(r, flags);
r->connection->data = ar;
return rc;
}
return ngx_http_send_special(r, flags);
}
static ngx_int_t
ngx_http_lua_output_filter(ngx_http_request_t *r, ngx_chain_t *in)
{
ngx_int_t rc;
ngx_http_lua_ctx_t *ctx;
ngx_http_request_t *ar; /* active request */
ar = r->connection->data;
if (ar != r) {
/* bypass ngx_http_postpone_filter_module */
r->connection->data = r;
rc = ngx_http_output_filter(r, in);
r->connection->data = ar;
return rc;
}
rc = ngx_http_output_filter(r, in);
if (rc == NGX_ERROR) {
return NGX_ERROR;
}
ctx = ngx_http_get_module_ctx(r, ngx_http_lua_module);
ngx_chain_update_chains(r->pool,
&ctx->free_bufs, &ctx->busy_bufs, &in,
(ngx_buf_tag_t) &ngx_http_lua_module);
return rc;
}
static ngx_int_t
ngx_http_lua_send_http10_headers(ngx_http_request_t *r,
ngx_http_lua_ctx_t *ctx)
{
off_t size;
ngx_chain_t *cl;
ngx_int_t rc;
if (r->header_sent || ctx->header_sent) {
return NGX_OK;
}
ngx_log_debug0(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
"lua sending HTTP 1.0 response headers");
if (r->header_only) {
goto send;
}
if (r->headers_out.content_length == NULL) {
for (size = 0, cl = ctx->out; cl; cl = cl->next) {
size += ngx_buf_size(cl->buf);
}
r->headers_out.content_length_n = size;
if (r->headers_out.content_length) {
r->headers_out.content_length->hash = 0;
}
}
send:
rc = ngx_http_send_header(r);
ctx->header_sent = 1;
return rc;
}
static void
ngx_http_lua_init_registry(lua_State *L, ngx_log_t *log)
{
ngx_log_debug0(NGX_LOG_DEBUG_HTTP, log, 0,
"lua initializing lua registry");
/* {{{ register a table to anchor lua coroutines reliably:
* {([int]ref) = [cort]} */
lua_pushlightuserdata(L, ngx_http_lua_lightudata_mask(
coroutines_key));
lua_createtable(L, 0, 32 /* nrec */);
lua_rawset(L, LUA_REGISTRYINDEX);
/* }}} */
/* create the registry entry for the Lua request ctx data table */
lua_pushliteral(L, ngx_http_lua_ctx_tables_key);
lua_createtable(L, 0, 32 /* nrec */);
lua_rawset(L, LUA_REGISTRYINDEX);
/* create the registry entry for the Lua socket connection pool table */
lua_pushlightuserdata(L, ngx_http_lua_lightudata_mask(
socket_pool_key));
lua_createtable(L, 0, 8 /* nrec */);
lua_rawset(L, LUA_REGISTRYINDEX);
/* {{{ register table to cache user code:
* { [(string)cache_key] = <code closure> } */
lua_pushlightuserdata(L, ngx_http_lua_lightudata_mask(
code_cache_key));
lua_createtable(L, 0, 8 /* nrec */);
lua_rawset(L, LUA_REGISTRYINDEX);
/* }}} */
}
static void
ngx_http_lua_init_globals(lua_State *L, ngx_cycle_t *cycle,
ngx_http_lua_main_conf_t *lmcf, ngx_log_t *log)
{
ngx_log_debug0(NGX_LOG_DEBUG_HTTP, log, 0,
"lua initializing lua globals");
#if defined(NDK) && NDK
ngx_http_lua_inject_ndk_api(L);
#endif /* defined(NDK) && NDK */
ngx_http_lua_inject_ngx_api(L, lmcf, log);
}
static void
ngx_http_lua_inject_ngx_api(lua_State *L, ngx_http_lua_main_conf_t *lmcf,
ngx_log_t *log)
{
lua_createtable(L, 0 /* narr */, 113 /* nrec */); /* ngx.* */
lua_pushcfunction(L, ngx_http_lua_get_raw_phase_context);
lua_setfield(L, -2, "_phase_ctx");
ngx_http_lua_inject_arg_api(L);
ngx_http_lua_inject_http_consts(L);
ngx_http_lua_inject_core_consts(L);
ngx_http_lua_inject_log_api(L);
ngx_http_lua_inject_output_api(L);
ngx_http_lua_inject_string_api(L);
ngx_http_lua_inject_control_api(log, L);
ngx_http_lua_inject_subrequest_api(L);
ngx_http_lua_inject_sleep_api(L);
ngx_http_lua_inject_req_api(log, L);
ngx_http_lua_inject_resp_header_api(L);
ngx_http_lua_create_headers_metatable(log, L);
ngx_http_lua_inject_shdict_api(lmcf, L);
ngx_http_lua_inject_socket_tcp_api(log, L);
ngx_http_lua_inject_socket_udp_api(log, L);
ngx_http_lua_inject_uthread_api(log, L);
ngx_http_lua_inject_timer_api(L);
ngx_http_lua_inject_config_api(L);
lua_getglobal(L, "package"); /* ngx package */
lua_getfield(L, -1, "loaded"); /* ngx package loaded */
lua_pushvalue(L, -3); /* ngx package loaded ngx */
lua_setfield(L, -2, "ngx"); /* ngx package loaded */
lua_pop(L, 2);
lua_setglobal(L, "ngx");
ngx_http_lua_inject_coroutine_api(log, L);
}
#ifdef OPENRESTY_LUAJIT
static void
ngx_http_lua_inject_global_write_guard(lua_State *L, ngx_log_t *log)
{
int rc;
const char buf[] =
"local ngx_log = ngx.log\n"
"local ngx_WARN = ngx.WARN\n"
"local tostring = tostring\n"
"local ngx_get_phase = ngx.get_phase\n"
"local traceback = require 'debug'.traceback\n"
"local function newindex(table, key, value)\n"
"rawset(table, key, value)\n"
"local phase = ngx_get_phase()\n"
"if phase == 'init_worker' or phase == 'init' then\n"
"return\n"
"end\n"
"ngx_log(ngx_WARN, 'writing a global Lua variable "
"(\\'', tostring(key), '\\') which may lead to "
"race conditions between concurrent requests, so "
"prefer the use of \\'local\\' variables', "
"traceback('', 2))\n"
"end\n"
"setmetatable(_G, { __newindex = newindex })\n"
;
rc = luaL_loadbuffer(L, buf, sizeof(buf) - 1, "=_G write guard");
if (rc != 0) {
ngx_log_error(NGX_LOG_ERR, log, 0,
"failed to load Lua code (%i): %s",
rc, lua_tostring(L, -1));
lua_pop(L, 1);
return;
}
rc = lua_pcall(L, 0, 0, 0);
if (rc != 0) {
ngx_log_error(NGX_LOG_ERR, log, 0,
"failed to run Lua code (%i): %s",
rc, lua_tostring(L, -1));
lua_pop(L, 1);
}
}
#endif
void
ngx_http_lua_discard_bufs(ngx_pool_t *pool, ngx_chain_t *in)
{
ngx_chain_t *cl;
for (cl = in; cl; cl = cl->next) {
cl->buf->pos = cl->buf->last;
cl->buf->file_pos = cl->buf->file_last;
}
}
ngx_int_t
ngx_http_lua_add_copy_chain(ngx_http_request_t *r, ngx_http_lua_ctx_t *ctx,
ngx_chain_t ***plast, ngx_chain_t *in, ngx_int_t *eof)
{
ngx_chain_t *cl;
size_t len;
ngx_buf_t *b;
len = 0;
*eof = 0;
for (cl = in; cl; cl = cl->next) {
if (ngx_buf_in_memory(cl->buf)) {
len += cl->buf->last - cl->buf->pos;
}
if (cl->buf->last_in_chain || cl->buf->last_buf) {
*eof = 1;
}
}
if (len == 0) {
return NGX_OK;
}
cl = ngx_http_lua_chain_get_free_buf(r->connection->log, r->pool,
&ctx->free_bufs, len);
if (cl == NULL) {
return NGX_ERROR;
}
dd("chains get free buf: %d == %d", (int) (cl->buf->end - cl->buf->start),
(int) len);
b = cl->buf;
while (in) {
if (ngx_buf_in_memory(in->buf)) {
b->last = ngx_copy(b->last, in->buf->pos,
in->buf->last - in->buf->pos);
}
in = in->next;
}
**plast = cl;
*plast = &cl->next;
return NGX_OK;
}
void
ngx_http_lua_reset_ctx(ngx_http_request_t *r, lua_State *L,
ngx_http_lua_ctx_t *ctx)
{
ngx_log_debug0(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
"lua reset ctx");
ngx_http_lua_finalize_threads(r, ctx, L);
#if 0
if (ctx->user_co_ctx) {
/* no way to destroy a list but clean up the whole pool */
ctx->user_co_ctx = NULL;
}
#endif
ngx_memzero(&ctx->entry_co_ctx, sizeof(ngx_http_lua_co_ctx_t));
ctx->entry_co_ctx.next_zombie_child_thread =
&ctx->entry_co_ctx.zombie_child_threads;
ctx->entry_co_ctx.co_ref = LUA_NOREF;
ctx->entered_rewrite_phase = 0;
ctx->entered_access_phase = 0;
ctx->entered_content_phase = 0;
ctx->exit_code = 0;
ctx->exited = 0;
ctx->resume_handler = ngx_http_lua_wev_handler;