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Copy pathngx_http_lua_subrequest.c
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ngx_http_lua_subrequest.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 "ngx_http_lua_subrequest.h"
#include "ngx_http_lua_util.h"
#include "ngx_http_lua_ctx.h"
#include "ngx_http_lua_contentby.h"
#include "ngx_http_lua_headers_in.h"
#if defined(NGX_DTRACE) && NGX_DTRACE
#include "ngx_http_probe.h"
#endif
#define NGX_HTTP_LUA_SHARE_ALL_VARS 0x01
#define NGX_HTTP_LUA_COPY_ALL_VARS 0x02
#define ngx_http_lua_method_name(m) { sizeof(m) - 1, (u_char *) m " " }
ngx_str_t ngx_http_lua_get_method = ngx_http_lua_method_name("GET");
ngx_str_t ngx_http_lua_put_method = ngx_http_lua_method_name("PUT");
ngx_str_t ngx_http_lua_post_method = ngx_http_lua_method_name("POST");
ngx_str_t ngx_http_lua_head_method = ngx_http_lua_method_name("HEAD");
ngx_str_t ngx_http_lua_delete_method =
ngx_http_lua_method_name("DELETE");
ngx_str_t ngx_http_lua_options_method =
ngx_http_lua_method_name("OPTIONS");
ngx_str_t ngx_http_lua_copy_method = ngx_http_lua_method_name("COPY");
ngx_str_t ngx_http_lua_move_method = ngx_http_lua_method_name("MOVE");
ngx_str_t ngx_http_lua_lock_method = ngx_http_lua_method_name("LOCK");
ngx_str_t ngx_http_lua_mkcol_method =
ngx_http_lua_method_name("MKCOL");
ngx_str_t ngx_http_lua_propfind_method =
ngx_http_lua_method_name("PROPFIND");
ngx_str_t ngx_http_lua_proppatch_method =
ngx_http_lua_method_name("PROPPATCH");
ngx_str_t ngx_http_lua_unlock_method =
ngx_http_lua_method_name("UNLOCK");
ngx_str_t ngx_http_lua_patch_method =
ngx_http_lua_method_name("PATCH");
ngx_str_t ngx_http_lua_trace_method =
ngx_http_lua_method_name("TRACE");
static ngx_str_t ngx_http_lua_content_length_header_key =
ngx_string("Content-Length");
static ngx_int_t ngx_http_lua_adjust_subrequest(ngx_http_request_t *sr,
ngx_uint_t method, int forward_body,
ngx_http_request_body_t *body, unsigned vars_action,
ngx_array_t *extra_vars);
static int ngx_http_lua_ngx_location_capture(lua_State *L);
static int ngx_http_lua_ngx_location_capture_multi(lua_State *L);
static void ngx_http_lua_process_vars_option(ngx_http_request_t *r,
lua_State *L, int table, ngx_array_t **varsp);
static ngx_int_t ngx_http_lua_subrequest_add_extra_vars(ngx_http_request_t *r,
ngx_array_t *extra_vars);
static ngx_int_t ngx_http_lua_subrequest(ngx_http_request_t *r,
ngx_str_t *uri, ngx_str_t *args, ngx_http_request_t **psr,
ngx_http_post_subrequest_t *ps, ngx_uint_t flags);
static ngx_int_t ngx_http_lua_subrequest_resume(ngx_http_request_t *r);
static void ngx_http_lua_handle_subreq_responses(ngx_http_request_t *r,
ngx_http_lua_ctx_t *ctx);
static void ngx_http_lua_cancel_subreq(ngx_http_request_t *r);
static ngx_int_t ngx_http_post_request_to_head(ngx_http_request_t *r);
static ngx_int_t ngx_http_lua_copy_in_file_request_body(ngx_http_request_t *r);
static ngx_int_t ngx_http_lua_copy_request_headers(ngx_http_request_t *sr,
ngx_http_request_t *pr, int pr_not_chunked);
enum {
NGX_HTTP_LUA_SUBREQ_TRUNCATED = 1,
};
/* ngx.location.capture is just a thin wrapper around
* ngx.location.capture_multi */
static int
ngx_http_lua_ngx_location_capture(lua_State *L)
{
int n;
n = lua_gettop(L);
if (n != 1 && n != 2) {
return luaL_error(L, "expecting one or two arguments");
}
lua_createtable(L, n, 0); /* uri opts? table */
lua_insert(L, 1); /* table uri opts? */
if (n == 1) { /* table uri */
lua_rawseti(L, 1, 1); /* table */
} else { /* table uri opts */
lua_rawseti(L, 1, 2); /* table uri */
lua_rawseti(L, 1, 1); /* table */
}
lua_createtable(L, 1, 0); /* table table' */
lua_insert(L, 1); /* table' table */
lua_rawseti(L, 1, 1); /* table' */
return ngx_http_lua_ngx_location_capture_multi(L);
}
static int
ngx_http_lua_ngx_location_capture_multi(lua_State *L)
{
ngx_http_request_t *r;
ngx_http_request_t *sr = NULL; /* subrequest object */
ngx_http_post_subrequest_t *psr;
ngx_http_lua_ctx_t *sr_ctx;
ngx_http_lua_ctx_t *ctx;
ngx_array_t *extra_vars;
ngx_str_t uri;
ngx_str_t args;
ngx_str_t extra_args;
ngx_uint_t flags;
u_char *p;
u_char *q;
size_t len;
size_t nargs;
int rc;
int n;
int always_forward_body = 0;
ngx_uint_t method;
ngx_http_request_body_t *body;
int type;
ngx_buf_t *b;
unsigned vars_action;
ngx_uint_t nsubreqs;
ngx_uint_t index;
size_t sr_statuses_len;
size_t sr_headers_len;
size_t sr_bodies_len;
size_t sr_flags_len;
size_t ofs1, ofs2;
unsigned custom_ctx;
ngx_http_lua_co_ctx_t *coctx;
ngx_http_lua_post_subrequest_data_t *psr_data;
n = lua_gettop(L);
if (n != 1) {
return luaL_error(L, "only one argument is expected, but got %d", n);
}
luaL_checktype(L, 1, LUA_TTABLE);
nsubreqs = lua_objlen(L, 1);
if (nsubreqs == 0) {
return luaL_error(L, "at least one subrequest should be specified");
}
r = ngx_http_lua_get_req(L);
if (r == NULL) {
return luaL_error(L, "no request object found");
}
#if (NGX_HTTP_V2)
if (r->main->stream) {
return luaL_error(L, "http2 requests not supported yet");
}
#endif
ctx = ngx_http_get_module_ctx(r, ngx_http_lua_module);
if (ctx == NULL) {
return luaL_error(L, "no ctx found");
}
ngx_http_lua_check_context(L, ctx, NGX_HTTP_LUA_CONTEXT_REWRITE
| NGX_HTTP_LUA_CONTEXT_ACCESS
| NGX_HTTP_LUA_CONTEXT_CONTENT);
coctx = ctx->cur_co_ctx;
if (coctx == NULL) {
return luaL_error(L, "no co ctx found");
}
ngx_log_debug2(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
"lua location capture, uri:\"%V\" c:%ud", &r->uri,
r->main->count);
sr_statuses_len = nsubreqs * sizeof(ngx_int_t);
sr_headers_len = nsubreqs * sizeof(ngx_http_headers_out_t *);
sr_bodies_len = nsubreqs * sizeof(ngx_str_t);
sr_flags_len = nsubreqs * sizeof(uint8_t);
p = ngx_pcalloc(r->pool, sr_statuses_len + sr_headers_len +
sr_bodies_len + sr_flags_len);
if (p == NULL) {
return luaL_error(L, "no memory");
}
coctx->sr_statuses = (void *) p;
p += sr_statuses_len;
coctx->sr_headers = (void *) p;
p += sr_headers_len;
coctx->sr_bodies = (void *) p;
p += sr_bodies_len;
coctx->sr_flags = (void *) p;
coctx->nsubreqs = nsubreqs;
coctx->pending_subreqs = 0;
extra_vars = NULL;
for (index = 0; index < nsubreqs; index++) {
coctx->pending_subreqs++;
lua_rawgeti(L, 1, index + 1);
if (lua_isnil(L, -1)) {
return luaL_error(L, "only array-like tables are allowed");
}
dd("queries query: top %d", lua_gettop(L));
if (lua_type(L, -1) != LUA_TTABLE) {
return luaL_error(L, "the query argument %d is not a table, "
"but a %s",
index, lua_typename(L, lua_type(L, -1)));
}
nargs = lua_objlen(L, -1);
if (nargs != 1 && nargs != 2) {
return luaL_error(L, "query argument %d expecting one or "
"two arguments", index);
}
lua_rawgeti(L, 2, 1); /* queries query uri */
dd("queries query uri: %d", lua_gettop(L));
dd("first arg in first query: %s", lua_typename(L, lua_type(L, -1)));
body = NULL;
ngx_str_null(&extra_args);
if (extra_vars != NULL) {
/* flush out existing elements in the array */
extra_vars->nelts = 0;
}
vars_action = 0;
custom_ctx = 0;
if (nargs == 2) {
/* check out the options table */
lua_rawgeti(L, 2, 2); /* queries query uri opts */
dd("queries query uri opts: %d", lua_gettop(L));
if (lua_type(L, 4) != LUA_TTABLE) {
return luaL_error(L, "expecting table as the 2nd argument for "
"subrequest %d, but got %s", index,
luaL_typename(L, 4));
}
dd("queries query uri opts: %d", lua_gettop(L));
/* check the args option */
lua_getfield(L, 4, "args");
type = lua_type(L, -1);
switch (type) {
case LUA_TTABLE:
ngx_http_lua_process_args_option(r, L, -1, &extra_args);
break;
case LUA_TNIL:
/* do nothing */
break;
case LUA_TNUMBER:
case LUA_TSTRING:
extra_args.data = (u_char *) lua_tolstring(L, -1, &len);
extra_args.len = len;
break;
default:
return luaL_error(L, "Bad args option value");
}
lua_pop(L, 1);
dd("queries query uri opts: %d", lua_gettop(L));
/* check the vars option */
lua_getfield(L, 4, "vars");
switch (lua_type(L, -1)) {
case LUA_TTABLE:
ngx_http_lua_process_vars_option(r, L, -1, &extra_vars);
dd("post process vars top: %d", lua_gettop(L));
break;
case LUA_TNIL:
/* do nothing */
break;
default:
return luaL_error(L, "Bad vars option value");
}
lua_pop(L, 1);
dd("queries query uri opts: %d", lua_gettop(L));
/* check the share_all_vars option */
lua_getfield(L, 4, "share_all_vars");
switch (lua_type(L, -1)) {
case LUA_TNIL:
/* do nothing */
break;
case LUA_TBOOLEAN:
if (lua_toboolean(L, -1)) {
vars_action |= NGX_HTTP_LUA_SHARE_ALL_VARS;
}
break;
default:
return luaL_error(L, "Bad share_all_vars option value");
}
lua_pop(L, 1);
dd("queries query uri opts: %d", lua_gettop(L));
/* check the copy_all_vars option */
lua_getfield(L, 4, "copy_all_vars");
switch (lua_type(L, -1)) {
case LUA_TNIL:
/* do nothing */
break;
case LUA_TBOOLEAN:
if (lua_toboolean(L, -1)) {
vars_action |= NGX_HTTP_LUA_COPY_ALL_VARS;
}
break;
default:
return luaL_error(L, "Bad copy_all_vars option value");
}
lua_pop(L, 1);
dd("queries query uri opts: %d", lua_gettop(L));
/* check the "forward_body" option */
lua_getfield(L, 4, "always_forward_body");
always_forward_body = lua_toboolean(L, -1);
lua_pop(L, 1);
dd("always forward body: %d", always_forward_body);
/* check the "method" option */
lua_getfield(L, 4, "method");
type = lua_type(L, -1);
if (type == LUA_TNIL) {
method = NGX_HTTP_GET;
} else {
if (type != LUA_TNUMBER) {
return luaL_error(L, "Bad http request method");
}
method = (ngx_uint_t) lua_tonumber(L, -1);
}
lua_pop(L, 1);
dd("queries query uri opts: %d", lua_gettop(L));
/* check the "ctx" option */
lua_getfield(L, 4, "ctx");
type = lua_type(L, -1);
if (type != LUA_TNIL) {
if (type != LUA_TTABLE) {
return luaL_error(L, "Bad ctx option value type %s, "
"expected a Lua table",
lua_typename(L, type));
}
custom_ctx = 1;
} else {
lua_pop(L, 1);
}
dd("queries query uri opts ctx?: %d", lua_gettop(L));
/* check the "body" option */
lua_getfield(L, 4, "body");
type = lua_type(L, -1);
if (type != LUA_TNIL) {
if (type != LUA_TSTRING && type != LUA_TNUMBER) {
return luaL_error(L, "Bad http request body");
}
body = ngx_pcalloc(r->pool, sizeof(ngx_http_request_body_t));
if (body == NULL) {
return luaL_error(L, "no memory");
}
q = (u_char *) lua_tolstring(L, -1, &len);
dd("request body: [%.*s]", (int) len, q);
if (len) {
b = ngx_create_temp_buf(r->pool, len);
if (b == NULL) {
return luaL_error(L, "no memory");
}
b->last = ngx_copy(b->last, q, len);
body->bufs = ngx_alloc_chain_link(r->pool);
if (body->bufs == NULL) {
return luaL_error(L, "no memory");
}
body->bufs->buf = b;
body->bufs->next = NULL;
body->buf = b;
}
}
lua_pop(L, 1); /* pop the body */
/* stack: queries query uri opts ctx? */
lua_remove(L, 4);
/* stack: queries query uri ctx? */
dd("queries query uri ctx?: %d", lua_gettop(L));
} else {
method = NGX_HTTP_GET;
}
/* stack: queries query uri ctx? */
p = (u_char *) luaL_checklstring(L, 3, &len);
uri.data = ngx_palloc(r->pool, len);
if (uri.data == NULL) {
return luaL_error(L, "memory allocation error");
}
ngx_memcpy(uri.data, p, len);
uri.len = len;
ngx_str_null(&args);
flags = 0;
rc = ngx_http_parse_unsafe_uri(r, &uri, &args, &flags);
if (rc != NGX_OK) {
dd("rc = %d", (int) rc);
return luaL_error(L, "unsafe uri in argument #1: %s", p);
}
if (args.len == 0) {
if (extra_args.len) {
p = ngx_palloc(r->pool, extra_args.len);
if (p == NULL) {
return luaL_error(L, "no memory");
}
ngx_memcpy(p, extra_args.data, extra_args.len);
args.data = p;
args.len = extra_args.len;
}
} else if (extra_args.len) {
/* concatenate the two parts of args together */
len = args.len + (sizeof("&") - 1) + extra_args.len;
p = ngx_palloc(r->pool, len);
if (p == NULL) {
return luaL_error(L, "no memory");
}
q = ngx_copy(p, args.data, args.len);
*q++ = '&';
ngx_memcpy(q, extra_args.data, extra_args.len);
args.data = p;
args.len = len;
}
ofs1 = ngx_align(sizeof(ngx_http_post_subrequest_t), sizeof(void *));
ofs2 = ngx_align(sizeof(ngx_http_lua_ctx_t), sizeof(void *));
p = ngx_palloc(r->pool, ofs1 + ofs2
+ sizeof(ngx_http_lua_post_subrequest_data_t));
if (p == NULL) {
return luaL_error(L, "no memory");
}
psr = (ngx_http_post_subrequest_t *) p;
p += ofs1;
sr_ctx = (ngx_http_lua_ctx_t *) p;
ngx_http_lua_assert((void *) sr_ctx == ngx_align_ptr(sr_ctx,
sizeof(void *)));
p += ofs2;
psr_data = (ngx_http_lua_post_subrequest_data_t *) p;
ngx_http_lua_assert((void *) psr_data == ngx_align_ptr(psr_data,
sizeof(void *)));
ngx_memzero(sr_ctx, sizeof(ngx_http_lua_ctx_t));
/* set by ngx_memzero:
* sr_ctx->run_post_subrequest = 0
* sr_ctx->free = NULL
* sr_ctx->body = NULL
*/
psr_data->ctx = sr_ctx;
psr_data->pr_co_ctx = coctx;
psr->handler = ngx_http_lua_post_subrequest;
psr->data = psr_data;
rc = ngx_http_lua_subrequest(r, &uri, &args, &sr, psr, 0);
if (rc != NGX_OK) {
return luaL_error(L, "failed to issue subrequest: %d", (int) rc);
}
ngx_http_lua_init_ctx(sr, sr_ctx);
sr_ctx->capture = 1;
sr_ctx->index = index;
sr_ctx->last_body = &sr_ctx->body;
sr_ctx->vm_state = ctx->vm_state;
ngx_http_set_ctx(sr, sr_ctx, ngx_http_lua_module);
rc = ngx_http_lua_adjust_subrequest(sr, method, always_forward_body,
body, vars_action, extra_vars);
if (rc != NGX_OK) {
ngx_http_lua_cancel_subreq(sr);
return luaL_error(L, "failed to adjust the subrequest: %d",
(int) rc);
}
dd("queries query uri opts ctx? %d", lua_gettop(L));
/* stack: queries query uri ctx? */
if (custom_ctx) {
ngx_http_lua_ngx_set_ctx_helper(L, sr, sr_ctx, -1);
lua_pop(L, 3);
} else {
lua_pop(L, 2);
}
/* stack: queries */
}
if (extra_vars) {
ngx_array_destroy(extra_vars);
}
ctx->no_abort = 1;
return lua_yield(L, 0);
}
static ngx_int_t
ngx_http_lua_adjust_subrequest(ngx_http_request_t *sr, ngx_uint_t method,
int always_forward_body, ngx_http_request_body_t *body,
unsigned vars_action, ngx_array_t *extra_vars)
{
ngx_http_request_t *r;
ngx_http_core_main_conf_t *cmcf;
int pr_not_chunked = 0;
size_t size;
r = sr->parent;
sr->header_in = r->header_in;
if (body) {
sr->request_body = body;
} else if (!always_forward_body
&& method != NGX_HTTP_PUT
&& method != NGX_HTTP_POST
&& r->headers_in.content_length_n > 0)
{
sr->request_body = NULL;
} else {
if (!r->headers_in.chunked) {
pr_not_chunked = 1;
}
if (sr->request_body && sr->request_body->temp_file) {
/* deep-copy the request body */
if (ngx_http_lua_copy_in_file_request_body(sr) != NGX_OK) {
return NGX_ERROR;
}
}
}
if (ngx_http_lua_copy_request_headers(sr, r, pr_not_chunked) != NGX_OK) {
return NGX_ERROR;
}
sr->method = method;
switch (method) {
case NGX_HTTP_GET:
sr->method_name = ngx_http_lua_get_method;
break;
case NGX_HTTP_POST:
sr->method_name = ngx_http_lua_post_method;
break;
case NGX_HTTP_PUT:
sr->method_name = ngx_http_lua_put_method;
break;
case NGX_HTTP_HEAD:
sr->method_name = ngx_http_lua_head_method;
break;
case NGX_HTTP_DELETE:
sr->method_name = ngx_http_lua_delete_method;
break;
case NGX_HTTP_OPTIONS:
sr->method_name = ngx_http_lua_options_method;
break;
case NGX_HTTP_MKCOL:
sr->method_name = ngx_http_lua_mkcol_method;
break;
case NGX_HTTP_COPY:
sr->method_name = ngx_http_lua_copy_method;
break;
case NGX_HTTP_MOVE:
sr->method_name = ngx_http_lua_move_method;
break;
case NGX_HTTP_PROPFIND:
sr->method_name = ngx_http_lua_propfind_method;
break;
case NGX_HTTP_PROPPATCH:
sr->method_name = ngx_http_lua_proppatch_method;
break;
case NGX_HTTP_LOCK:
sr->method_name = ngx_http_lua_lock_method;
break;
case NGX_HTTP_UNLOCK:
sr->method_name = ngx_http_lua_unlock_method;
break;
case NGX_HTTP_PATCH:
sr->method_name = ngx_http_lua_patch_method;
break;
case NGX_HTTP_TRACE:
sr->method_name = ngx_http_lua_trace_method;
break;
default:
ngx_log_error(NGX_LOG_ERR, r->connection->log, 0,
"unsupported HTTP method: %ui", method);
return NGX_ERROR;
}
if (!(vars_action & NGX_HTTP_LUA_SHARE_ALL_VARS)) {
/* we do not inherit the parent request's variables */
cmcf = ngx_http_get_module_main_conf(sr, ngx_http_core_module);
size = cmcf->variables.nelts * sizeof(ngx_http_variable_value_t);
if (vars_action & NGX_HTTP_LUA_COPY_ALL_VARS) {
sr->variables = ngx_palloc(sr->pool, size);
if (sr->variables == NULL) {
return NGX_ERROR;
}
ngx_memcpy(sr->variables, r->variables, size);
} else {
/* we do not inherit the parent request's variables */
sr->variables = ngx_pcalloc(sr->pool, size);
if (sr->variables == NULL) {
return NGX_ERROR;
}
}
}
return ngx_http_lua_subrequest_add_extra_vars(sr, extra_vars);
}
static ngx_int_t
ngx_http_lua_subrequest_add_extra_vars(ngx_http_request_t *sr,
ngx_array_t *extra_vars)
{
ngx_http_core_main_conf_t *cmcf;
ngx_http_variable_t *v;
ngx_http_variable_value_t *vv;
u_char *val;
u_char *p;
ngx_uint_t i, hash;
ngx_str_t name;
size_t len;
ngx_hash_t *variables_hash;
ngx_keyval_t *var;
/* set any extra variables that were passed to the subrequest */
if (extra_vars == NULL || extra_vars->nelts == 0) {
return NGX_OK;
}
cmcf = ngx_http_get_module_main_conf(sr, ngx_http_core_module);
variables_hash = &cmcf->variables_hash;
var = extra_vars->elts;
for (i = 0; i < extra_vars->nelts; i++, var++) {
/* copy the variable's name and value because they are allocated
* by the lua VM */
len = var->key.len + var->value.len;
p = ngx_pnalloc(sr->pool, len);
if (p == NULL) {
return NGX_ERROR;
}
name.data = p;
name.len = var->key.len;
p = ngx_copy(p, var->key.data, var->key.len);
hash = ngx_hash_strlow(name.data, name.data, name.len);
val = p;
len = var->value.len;
ngx_memcpy(p, var->value.data, len);
v = ngx_hash_find(variables_hash, hash, name.data, name.len);
if (v) {
if (!(v->flags & NGX_HTTP_VAR_CHANGEABLE)) {
ngx_log_error(NGX_LOG_ERR, sr->connection->log, 0,
"variable \"%V\" not changeable", &name);
return NGX_HTTP_INTERNAL_SERVER_ERROR;
}
if (v->set_handler) {
vv = ngx_palloc(sr->pool, sizeof(ngx_http_variable_value_t));
if (vv == NULL) {
return NGX_ERROR;
}
vv->valid = 1;
vv->not_found = 0;
vv->no_cacheable = 0;
vv->data = val;
vv->len = len;
v->set_handler(sr, vv, v->data);
ngx_log_debug2(NGX_LOG_DEBUG_HTTP, sr->connection->log, 0,
"variable \"%V\" set to value \"%v\"", &name,
vv);
continue;
}
if (v->flags & NGX_HTTP_VAR_INDEXED) {
vv = &sr->variables[v->index];
vv->valid = 1;
vv->not_found = 0;
vv->no_cacheable = 0;
vv->data = val;
vv->len = len;
ngx_log_debug2(NGX_LOG_DEBUG_HTTP, sr->connection->log, 0,
"variable \"%V\" set to value \"%v\"",
&name, vv);
continue;
}
}
ngx_log_error(NGX_LOG_ERR, sr->connection->log, 0,
"variable \"%V\" cannot be assigned a value (maybe you "
"forgot to define it first?) ", &name);
return NGX_ERROR;
}
return NGX_OK;
}
static void
ngx_http_lua_process_vars_option(ngx_http_request_t *r, lua_State *L,
int table, ngx_array_t **varsp)
{
ngx_array_t *vars;
ngx_keyval_t *var;
if (table < 0) {
table = lua_gettop(L) + table + 1;
}
vars = *varsp;
if (vars == NULL) {
vars = ngx_array_create(r->pool, 4, sizeof(ngx_keyval_t));
if (vars == NULL) {
dd("here");
luaL_error(L, "no memory");
return;
}
*varsp = vars;
}
lua_pushnil(L);
while (lua_next(L, table) != 0) {
if (lua_type(L, -2) != LUA_TSTRING) {
luaL_error(L, "attempt to use a non-string key in the "
"\"vars\" option table");
return;
}
if (!lua_isstring(L, -1)) {
luaL_error(L, "attempt to use bad variable value type %s",
luaL_typename(L, -1));
return;
}
var = ngx_array_push(vars);
if (var == NULL) {
dd("here");
luaL_error(L, "no memory");
return;
}
var->key.data = (u_char *) lua_tolstring(L, -2, &var->key.len);
var->value.data = (u_char *) lua_tolstring(L, -1, &var->value.len);
lua_pop(L, 1);
}
}
ngx_int_t
ngx_http_lua_post_subrequest(ngx_http_request_t *r, void *data, ngx_int_t rc)
{
ngx_http_request_t *pr;
ngx_http_lua_ctx_t *pr_ctx;
ngx_http_lua_ctx_t *ctx; /* subrequest ctx */
ngx_http_lua_co_ctx_t *pr_coctx;
size_t len;
ngx_str_t *body_str;
u_char *p;
ngx_chain_t *cl;
ngx_http_lua_post_subrequest_data_t *psr_data = data;
ctx = psr_data->ctx;
if (ctx->run_post_subrequest) {
if (r != r->connection->data) {
r->connection->data = r;
}
return NGX_OK;
}
ngx_log_debug2(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
"lua run post subrequest handler, rc:%i c:%ud", rc,
r->main->count);
ctx->run_post_subrequest = 1;
pr = r->parent;
pr_ctx = ngx_http_get_module_ctx(pr, ngx_http_lua_module);
if (pr_ctx == NULL) {
return NGX_ERROR;
}
pr_coctx = psr_data->pr_co_ctx;
pr_coctx->pending_subreqs--;
if (pr_coctx->pending_subreqs == 0) {
dd("all subrequests are done");
pr_ctx->no_abort = 0;
pr_ctx->resume_handler = ngx_http_lua_subrequest_resume;
pr_ctx->cur_co_ctx = pr_coctx;
}
if (pr_ctx->entered_content_phase) {
ngx_log_debug0(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
"lua restoring write event handler");
pr->write_event_handler = ngx_http_lua_content_wev_handler;
} else {
pr->write_event_handler = ngx_http_core_run_phases;
}
dd("status rc = %d", (int) rc);
dd("status headers_out.status = %d", (int) r->headers_out.status);
dd("uri: %.*s", (int) r->uri.len, r->uri.data);
/* capture subrequest response status */