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nginx-unit/src/nxt_php_sapi.c
Andrew Clayton 919cae7ff9 PHP: Fix a possible file-pointer leak. 
In nxt_php_execute() it is possible we could bail out before cleaning up
the FILE * representing the PHP script to execute.

At this point we only need to call fclose(3) on it.

We could have possibly moved the opening of this file to later in the
function, but it is probably good to bail out as early as possible if we
can't open it.

This was found by Coverity.

Fixes: bebc03c72 ("PHP: Implement better error handling.")
Signed-off-by: Andrew Clayton <a.clayton@nginx.com>
2023-11-15 03:34:49 +00:00

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/*
* Copyright (C) Max Romanov
* Copyright (C) Valentin V. Bartenev
* Copyright (C) NGINX, Inc.
*/
#include "php.h"
#include "SAPI.h"
#include "php_main.h"
#include "php_variables.h"
#include "ext/standard/php_standard.h"
#include <nxt_main.h>
#include <nxt_router.h>
#include <nxt_unit.h>
#include <nxt_unit_request.h>
#include <nxt_http.h>
#if (PHP_VERSION_ID >= 50400)
#define NXT_HAVE_PHP_IGNORE_CWD 1
#endif
#if (PHP_VERSION_ID >= 70100)
#define NXT_HAVE_PHP_LOG_MESSAGE_WITH_SYSLOG_TYPE 1
#else
#define NXT_HAVE_PHP_INTERRUPTS 1
#endif
#if (PHP_VERSION_ID >= 70000)
#define NXT_PHP7 1
#endif
#if (PHP_VERSION_ID >= 80000)
#define NXT_PHP8 1
#endif
/* PHP 8 */
#ifndef TSRMLS_CC
#define TSRMLS_CC
#define TSRMLS_DC
#define TSRMLS_D void
#define TSRMLS_C
#endif
typedef struct {
nxt_str_t root;
nxt_str_t index;
nxt_str_t script_name;
nxt_str_t script_dirname;
nxt_str_t script_filename;
} nxt_php_target_t;
typedef struct {
char *cookie;
nxt_str_t *root;
nxt_str_t *index;
nxt_str_t path_info;
nxt_str_t script_name;
nxt_str_t script_filename;
nxt_str_t script_dirname;
nxt_unit_request_info_t *req;
uint8_t chdir; /* 1 bit */
} nxt_php_run_ctx_t;
#if NXT_PHP8
typedef int (*nxt_php_disable_t)(const char *p, size_t size);
#elif NXT_PHP7
typedef int (*nxt_php_disable_t)(char *p, size_t size);
#else
typedef int (*nxt_php_disable_t)(char *p, uint TSRMLS_DC);
#endif
#if (PHP_VERSION_ID < 70200)
typedef void (*zif_handler)(INTERNAL_FUNCTION_PARAMETERS);
#endif
static nxt_int_t nxt_php_setup(nxt_task_t *task, nxt_process_t *process,
nxt_common_app_conf_t *conf);
static nxt_int_t nxt_php_start(nxt_task_t *task, nxt_process_data_t *data);
static nxt_int_t nxt_php_set_target(nxt_task_t *task, nxt_php_target_t *target,
nxt_conf_value_t *conf);
static nxt_int_t nxt_php_set_ini_path(nxt_task_t *task, nxt_str_t *path,
char *workdir);
static void nxt_php_set_options(nxt_task_t *task, nxt_conf_value_t *options,
int type);
static nxt_int_t nxt_php_alter_option(nxt_str_t *name, nxt_str_t *value,
int type);
#ifdef NXT_PHP8
static void nxt_php_disable_functions(nxt_str_t *str);
#endif
static void nxt_php_disable(nxt_task_t *task, const char *type,
nxt_str_t *value, char **ptr, nxt_php_disable_t disable);
static nxt_int_t nxt_php_dirname(const nxt_str_t *file, nxt_str_t *dir);
static void nxt_php_str_trim_trail(nxt_str_t *str, u_char t);
static void nxt_php_str_trim_lead(nxt_str_t *str, u_char t);
nxt_inline u_char *nxt_realpath(const void *c);
static nxt_int_t nxt_php_do_301(nxt_unit_request_info_t *req);
static nxt_int_t nxt_php_handle_fs_err(nxt_unit_request_info_t *req);
static void nxt_php_request_handler(nxt_unit_request_info_t *req);
static void nxt_php_dynamic_request(nxt_php_run_ctx_t *ctx,
nxt_unit_request_t *r);
#if (PHP_VERSION_ID < 70400)
static void nxt_zend_stream_init_fp(zend_file_handle *handle, FILE *fp,
const char *filename);
#endif
static void nxt_php_execute(nxt_php_run_ctx_t *ctx, nxt_unit_request_t *r);
nxt_inline void nxt_php_vcwd_chdir(nxt_unit_request_info_t *req, u_char *dir);
static int nxt_php_startup(sapi_module_struct *sapi_module);
static int nxt_php_send_headers(sapi_headers_struct *sapi_headers TSRMLS_DC);
static void *nxt_php_hash_str_find_ptr(const HashTable *ht,
const nxt_str_t *str);
static char *nxt_php_read_cookies(TSRMLS_D);
static void nxt_php_set_sptr(nxt_unit_request_info_t *req, const char *name,
nxt_unit_sptr_t *v, uint32_t len, zval *track_vars_array TSRMLS_DC);
nxt_inline void nxt_php_set_str(nxt_unit_request_info_t *req, const char *name,
nxt_str_t *s, zval *track_vars_array TSRMLS_DC);
static void nxt_php_set_cstr(nxt_unit_request_info_t *req, const char *name,
const char *str, uint32_t len, zval *track_vars_array TSRMLS_DC);
static void nxt_php_register_variables(zval *track_vars_array TSRMLS_DC);
#if NXT_PHP8
static void nxt_php_log_message(const char *message, int syslog_type_int);
#else
#ifdef NXT_HAVE_PHP_LOG_MESSAGE_WITH_SYSLOG_TYPE
static void nxt_php_log_message(char *message, int syslog_type_int);
#else
static void nxt_php_log_message(char *message TSRMLS_DC);
#endif
#endif
#ifdef NXT_PHP7
static size_t nxt_php_unbuffered_write(const char *str,
size_t str_length TSRMLS_DC);
static size_t nxt_php_read_post(char *buffer, size_t count_bytes TSRMLS_DC);
#else
static int nxt_php_unbuffered_write(const char *str, uint str_length TSRMLS_DC);
static int nxt_php_read_post(char *buffer, uint count_bytes TSRMLS_DC);
#endif
#ifdef NXT_PHP7
#if (PHP_VERSION_ID < 70200)
ZEND_BEGIN_ARG_WITH_RETURN_TYPE_INFO_EX(arginfo_fastcgi_finish_request, 0, 0,
_IS_BOOL, NULL, 0)
#else
ZEND_BEGIN_ARG_WITH_RETURN_TYPE_INFO_EX(arginfo_fastcgi_finish_request, 0, 0,
_IS_BOOL, 0)
#endif
#else /* PHP5 */
ZEND_BEGIN_ARG_INFO_EX(arginfo_fastcgi_finish_request, 0, 0, 0)
#endif
ZEND_END_ARG_INFO()
ZEND_FUNCTION(fastcgi_finish_request);
PHP_MINIT_FUNCTION(nxt_php_ext);
ZEND_NAMED_FUNCTION(nxt_php_chdir);
static const zend_function_entry nxt_php_ext_functions[] = {
ZEND_FE(fastcgi_finish_request, arginfo_fastcgi_finish_request)
ZEND_FE_END
};
zif_handler nxt_php_chdir_handler;
zend_auto_global *nxt_php_server_ag;
static zend_module_entry nxt_php_unit_module = {
STANDARD_MODULE_HEADER,
"unit",
nxt_php_ext_functions, /* function table */
PHP_MINIT(nxt_php_ext), /* initialization */
NULL, /* shutdown */
NULL, /* request initialization */
NULL, /* request shutdown */
NULL, /* information */
NXT_VERSION,
STANDARD_MODULE_PROPERTIES
};
PHP_MINIT_FUNCTION(nxt_php_ext)
{
zend_function *func;
static const nxt_str_t chdir = nxt_string("chdir");
func = nxt_php_hash_str_find_ptr(CG(function_table), &chdir);
if (nxt_slow_path(func == NULL)) {
return FAILURE;
}
nxt_php_chdir_handler = func->internal_function.handler;
func->internal_function.handler = nxt_php_chdir;
return SUCCESS;
}
ZEND_NAMED_FUNCTION(nxt_php_chdir)
{
nxt_php_run_ctx_t *ctx;
ctx = SG(server_context);
if (nxt_fast_path(ctx != NULL)) {
ctx->chdir = 1;
}
nxt_php_chdir_handler(INTERNAL_FUNCTION_PARAM_PASSTHRU);
}
PHP_FUNCTION(fastcgi_finish_request)
{
zend_auto_global *ag;
nxt_php_run_ctx_t *ctx;
if (nxt_slow_path(zend_parse_parameters_none() == FAILURE)) {
#ifdef NXT_PHP8
RETURN_THROWS();
#else
return;
#endif
}
ctx = SG(server_context);
if (nxt_slow_path(ctx == NULL || ctx->req == NULL)) {
RETURN_FALSE;
}
#ifdef NXT_PHP7
php_output_end_all();
php_header();
#else
#ifdef PHP_OUTPUT_NEWAPI
php_output_end_all(TSRMLS_C);
#else
php_end_ob_buffers(1 TSRMLS_CC);
#endif
php_header(TSRMLS_C);
#endif
ag = nxt_php_server_ag;
if (ag->armed) {
#ifdef NXT_PHP7
ag->armed = ag->auto_global_callback(ag->name);
#else
ag->armed = ag->auto_global_callback(ag->name, ag->name_len TSRMLS_CC);
#endif
}
nxt_unit_request_done(ctx->req, NXT_UNIT_OK);
ctx->req = NULL;
PG(connection_status) = PHP_CONNECTION_ABORTED;
#ifdef NXT_PHP7
php_output_set_status(PHP_OUTPUT_DISABLED);
#else
#ifdef PHP_OUTPUT_NEWAPI
php_output_set_status(PHP_OUTPUT_DISABLED TSRMLS_CC);
#else
php_output_set_status(0 TSRMLS_CC);
#endif
#endif
RETURN_TRUE;
}
static sapi_module_struct nxt_php_sapi_module =
{
(char *) "cli-server",
(char *) "unit",
nxt_php_startup, /* startup */
php_module_shutdown_wrapper, /* shutdown */
NULL, /* activate */
NULL, /* deactivate */
nxt_php_unbuffered_write, /* unbuffered write */
NULL, /* flush */
NULL, /* get uid */
NULL, /* getenv */
php_error, /* error handler */
NULL, /* header handler */
nxt_php_send_headers, /* send headers handler */
NULL, /* send header handler */
nxt_php_read_post, /* read POST data */
nxt_php_read_cookies, /* read Cookies */
nxt_php_register_variables, /* register server variables */
nxt_php_log_message, /* log message */
NULL, /* get request time */
NULL, /* terminate process */
NULL, /* php_ini_path_override */
#ifdef NXT_HAVE_PHP_INTERRUPTS
NULL, /* block_interruptions */
NULL, /* unblock_interruptions */
#endif
NULL, /* default_post_reader */
NULL, /* treat_data */
NULL, /* executable_location */
0, /* php_ini_ignore */
#ifdef NXT_HAVE_PHP_IGNORE_CWD
1, /* php_ini_ignore_cwd */
#endif
NULL, /* get_fd */
NULL, /* force_http_10 */
NULL, /* get_target_uid */
NULL, /* get_target_gid */
NULL, /* input_filter */
NULL, /* ini_defaults */
0, /* phpinfo_as_text */
NULL, /* ini_entries */
NULL, /* additional_functions */
NULL /* input_filter_init */
};
static uint32_t compat[] = {
NXT_VERNUM, NXT_DEBUG,
};
NXT_EXPORT nxt_app_module_t nxt_app_module = {
sizeof(compat),
compat,
nxt_string("php"),
PHP_VERSION,
NULL,
0,
nxt_php_setup,
nxt_php_start,
};
static nxt_php_target_t *nxt_php_targets;
static nxt_int_t nxt_php_last_target = -1;
static nxt_unit_ctx_t *nxt_php_unit_ctx;
#if defined(ZTS) && (PHP_VERSION_ID < 70400)
static void ***tsrm_ls;
#endif
static nxt_int_t
nxt_php_setup(nxt_task_t *task, nxt_process_t *process,
nxt_common_app_conf_t *conf)
{
nxt_str_t ini_path;
nxt_int_t ret;
nxt_conf_value_t *value;
nxt_php_app_conf_t *c;
static nxt_str_t file_str = nxt_string("file");
static nxt_str_t user_str = nxt_string("user");
static nxt_str_t admin_str = nxt_string("admin");
c = &conf->u.php;
#ifdef ZTS
#if (PHP_VERSION_ID >= 70400)
php_tsrm_startup();
#else
tsrm_startup(1, 1, 0, NULL);
tsrm_ls = ts_resource(0);
#endif
#endif
#if defined(NXT_PHP7) && defined(ZEND_SIGNALS)
#if (NXT_ZEND_SIGNAL_STARTUP)
zend_signal_startup();
#elif defined(ZTS)
#error PHP is built with thread safety and broken signals.
#endif
#endif
sapi_startup(&nxt_php_sapi_module);
if (c->options != NULL) {
value = nxt_conf_get_object_member(c->options, &file_str, NULL);
if (value != NULL) {
nxt_conf_get_string(value, &ini_path);
ret = nxt_php_set_ini_path(task, &ini_path,
conf->working_directory);
if (nxt_slow_path(ret != NXT_OK)) {
return NXT_ERROR;
}
}
}
if (nxt_slow_path(nxt_php_startup(&nxt_php_sapi_module) == FAILURE)) {
nxt_alert(task, "failed to initialize SAPI module and extension");
return NXT_ERROR;
}
if (c->options != NULL) {
value = nxt_conf_get_object_member(c->options, &admin_str, NULL);
nxt_php_set_options(task, value, ZEND_INI_SYSTEM);
value = nxt_conf_get_object_member(c->options, &user_str, NULL);
nxt_php_set_options(task, value, ZEND_INI_USER);
}
#ifdef NXT_PHP7
nxt_php_server_ag = zend_hash_str_find_ptr(CG(auto_globals), "_SERVER",
nxt_length("_SERVER"));
#else
zend_hash_quick_find(CG(auto_globals), "_SERVER", sizeof("_SERVER"),
zend_hash_func("_SERVER", sizeof("_SERVER")),
(void **) &nxt_php_server_ag);
#endif
if (nxt_slow_path(nxt_php_server_ag == NULL)) {
nxt_alert(task, "failed to find $_SERVER auto global");
return NXT_ERROR;
}
return NXT_OK;
}
static nxt_int_t
nxt_php_start(nxt_task_t *task, nxt_process_data_t *data)
{
uint32_t next;
nxt_int_t ret;
nxt_str_t name;
nxt_uint_t n;
nxt_unit_ctx_t *unit_ctx;
nxt_unit_init_t php_init;
nxt_conf_value_t *value;
nxt_php_app_conf_t *c;
nxt_common_app_conf_t *conf;
conf = data->app;
c = &conf->u.php;
n = (c->targets != NULL) ? nxt_conf_object_members_count(c->targets) : 1;
nxt_php_targets = nxt_zalloc(sizeof(nxt_php_target_t) * n);
if (nxt_slow_path(nxt_php_targets == NULL)) {
return NXT_ERROR;
}
if (c->targets != NULL) {
next = 0;
for (n = 0; /* void */; n++) {
value = nxt_conf_next_object_member(c->targets, &name, &next);
if (value == NULL) {
break;
}
ret = nxt_php_set_target(task, &nxt_php_targets[n], value);
if (nxt_slow_path(ret != NXT_OK)) {
return NXT_ERROR;
}
}
} else {
ret = nxt_php_set_target(task, &nxt_php_targets[0], conf->self);
if (nxt_slow_path(ret != NXT_OK)) {
return NXT_ERROR;
}
}
ret = nxt_unit_default_init(task, &php_init, conf);
if (nxt_slow_path(ret != NXT_OK)) {
nxt_alert(task, "nxt_unit_default_init() failed");
return ret;
}
php_init.callbacks.request_handler = nxt_php_request_handler;
unit_ctx = nxt_unit_init(&php_init);
if (nxt_slow_path(unit_ctx == NULL)) {
return NXT_ERROR;
}
nxt_php_unit_ctx = unit_ctx;
nxt_unit_run(nxt_php_unit_ctx);
nxt_unit_done(nxt_php_unit_ctx);
exit(0);
return NXT_OK;
}
static nxt_int_t
nxt_php_set_target(nxt_task_t *task, nxt_php_target_t *target,
nxt_conf_value_t *conf)
{
u_char *tmp, *p;
nxt_str_t str;
nxt_int_t ret;
nxt_conf_value_t *value;
static nxt_str_t root_str = nxt_string("root");
static nxt_str_t script_str = nxt_string("script");
static nxt_str_t index_str = nxt_string("index");
value = nxt_conf_get_object_member(conf, &root_str, NULL);
nxt_conf_get_string(value, &str);
tmp = nxt_malloc(str.length + 1);
if (nxt_slow_path(tmp == NULL)) {
return NXT_ERROR;
}
p = tmp;
p = nxt_cpymem(p, str.start, str.length);
*p = '\0';
p = nxt_realpath(tmp);
if (nxt_slow_path(p == NULL)) {
nxt_alert(task, "root realpath(%s) failed %E", tmp, nxt_errno);
return NXT_ERROR;
}
nxt_free(tmp);
target->root.length = nxt_strlen(p);
target->root.start = p;
nxt_php_str_trim_trail(&target->root, '/');
value = nxt_conf_get_object_member(conf, &script_str, NULL);
if (value != NULL) {
nxt_conf_get_string(value, &str);
nxt_php_str_trim_lead(&str, '/');
tmp = nxt_malloc(target->root.length + 1 + str.length + 1);
if (nxt_slow_path(tmp == NULL)) {
return NXT_ERROR;
}
p = tmp;
p = nxt_cpymem(p, target->root.start, target->root.length);
*p++ = '/';
p = nxt_cpymem(p, str.start, str.length);
*p = '\0';
p = nxt_realpath(tmp);
if (nxt_slow_path(p == NULL)) {
nxt_alert(task, "script realpath(%s) failed %E", tmp, nxt_errno);
return NXT_ERROR;
}
nxt_free(tmp);
target->script_filename.length = nxt_strlen(p);
target->script_filename.start = p;
if (!nxt_str_start(&target->script_filename,
target->root.start, target->root.length))
{
nxt_alert(task, "script is not under php root");
return NXT_ERROR;
}
ret = nxt_php_dirname(&target->script_filename,
&target->script_dirname);
if (nxt_slow_path(ret != NXT_OK)) {
return NXT_ERROR;
}
target->script_name.length = target->script_filename.length
- target->root.length;
target->script_name.start = target->script_filename.start
+ target->root.length;
} else {
value = nxt_conf_get_object_member(conf, &index_str, NULL);
if (value != NULL) {
nxt_conf_get_string(value, &str);
tmp = nxt_malloc(str.length);
if (nxt_slow_path(tmp == NULL)) {
return NXT_ERROR;
}
nxt_memcpy(tmp, str.start, str.length);
target->index.length = str.length;
target->index.start = tmp;
} else {
nxt_str_set(&target->index, "index.php");
}
}
return NXT_OK;
}
static nxt_int_t
nxt_php_set_ini_path(nxt_task_t *task, nxt_str_t *ini_path, char *workdir)
{
size_t wdlen;
u_char *p, *start;
if (ini_path->start[0] == '/' || workdir == NULL) {
p = nxt_malloc(ini_path->length + 1);
if (nxt_slow_path(p == NULL)) {
return NXT_ERROR;
}
start = p;
} else {
wdlen = nxt_strlen(workdir);
p = nxt_malloc(wdlen + ini_path->length + 2);
if (nxt_slow_path(p == NULL)) {
return NXT_ERROR;
}
start = p;
p = nxt_cpymem(p, workdir, wdlen);
if (workdir[wdlen - 1] != '/') {
*p++ = '/';
}
}
p = nxt_cpymem(p, ini_path->start, ini_path->length);
*p = '\0';
nxt_php_sapi_module.php_ini_path_override = (char *) start;
return NXT_OK;
}
static void
nxt_php_set_options(nxt_task_t *task, nxt_conf_value_t *options, int type)
{
uint32_t next;
nxt_str_t name, value;
nxt_conf_value_t *value_obj;
if (options != NULL) {
next = 0;
for ( ;; ) {
value_obj = nxt_conf_next_object_member(options, &name, &next);
if (value_obj == NULL) {
break;
}
nxt_conf_get_string(value_obj, &value);
if (nxt_php_alter_option(&name, &value, type) != NXT_OK) {
nxt_log(task, NXT_LOG_ERR,
"setting PHP option \"%V: %V\" failed", &name, &value);
continue;
}
if (nxt_str_eq(&name, "disable_functions", 17)) {
#ifdef NXT_PHP8
nxt_php_disable_functions(&value);
#else
nxt_php_disable(task, "function", &value,
&PG(disable_functions),
zend_disable_function);
#endif
continue;
}
if (nxt_str_eq(&name, "disable_classes", 15)) {
nxt_php_disable(task, "class", &value,
&PG(disable_classes),
zend_disable_class);
continue;
}
}
}
}
#ifdef NXT_PHP7
static nxt_int_t
nxt_php_alter_option(nxt_str_t *name, nxt_str_t *value, int type)
{
zend_string *zs;
zend_ini_entry *ini_entry;
ini_entry = nxt_php_hash_str_find_ptr(EG(ini_directives), name);
if (nxt_slow_path(ini_entry == NULL)) {
return NXT_ERROR;
}
/* PHP exits on memory allocation errors. */
zs = zend_string_init((char *) value->start, value->length, 1);
if (ini_entry->on_modify
&& ini_entry->on_modify(ini_entry, zs, ini_entry->mh_arg1,
ini_entry->mh_arg2, ini_entry->mh_arg3,
ZEND_INI_STAGE_ACTIVATE)
!= SUCCESS)
{
zend_string_release(zs);
return NXT_ERROR;
}
ini_entry->value = zs;
ini_entry->modifiable = type;
return NXT_OK;
}
#else /* PHP 5. */
static nxt_int_t
nxt_php_alter_option(nxt_str_t *name, nxt_str_t *value, int type)
{
char *cstr;
zend_ini_entry *ini_entry;
ini_entry = nxt_php_hash_str_find_ptr(EG(ini_directives), name);
if (nxt_slow_path(ini_entry == NULL)) {
return NXT_ERROR;
}
cstr = nxt_malloc(value->length + 1);
if (nxt_slow_path(cstr == NULL)) {
return NXT_ERROR;
}
nxt_memcpy(cstr, value->start, value->length);
cstr[value->length] = '\0';
if (ini_entry->on_modify
&& ini_entry->on_modify(ini_entry, cstr, value->length,
ini_entry->mh_arg1, ini_entry->mh_arg2,
ini_entry->mh_arg3, ZEND_INI_STAGE_ACTIVATE
TSRMLS_CC)
!= SUCCESS)
{
nxt_free(cstr);
return NXT_ERROR;
}
ini_entry->value = cstr;
ini_entry->value_length = value->length;
ini_entry->modifiable = type;
return NXT_OK;
}
#endif
#ifdef NXT_PHP8
static void
nxt_php_disable_functions(nxt_str_t *str)
{
char *p;
p = nxt_malloc(str->length + 1);
if (nxt_slow_path(p == NULL)) {
return;
}
nxt_memcpy(p, str->start, str->length);
p[str->length] = '\0';
zend_disable_functions(p);
nxt_free(p);
}
#endif
static void
nxt_php_disable(nxt_task_t *task, const char *type, nxt_str_t *value,
char **ptr, nxt_php_disable_t disable)
{
char c, *p, *start;
p = nxt_malloc(value->length + 1);
if (nxt_slow_path(p == NULL)) {
return;
}
/*
* PHP frees this memory on module shutdown.
* See core_globals_dtor() for details.
*/
*ptr = p;
nxt_memcpy(p, value->start, value->length);
p[value->length] = '\0';
start = p;
do {
c = *p;
if (c == ' ' || c == ',' || c == '\0') {
if (p != start) {
*p = '\0';
#ifdef NXT_PHP7
if (disable(start, p - start)
#else
if (disable(start, p - start TSRMLS_CC)
#endif
!= SUCCESS)
{
nxt_log(task, NXT_LOG_ERR,
"PHP: failed to disable \"%s\": no such %s",
start, type);
}
}
start = p + 1;
}
p++;
} while (c != '\0');
}
static nxt_int_t
nxt_php_dirname(const nxt_str_t *file, nxt_str_t *dir)
{
size_t length;
if (file->length == 0 || file->start[0] != '/') {
nxt_unit_alert(NULL, "php_dirname: invalid file name "
"(not starts from '/')");
return NXT_ERROR;
}
length = file->length;
while (file->start[length - 1] != '/') {
length--;
}
dir->length = length;
dir->start = nxt_malloc(length + 1);
if (nxt_slow_path(dir->start == NULL)) {
return NXT_ERROR;
}
nxt_memcpy(dir->start, file->start, length);
dir->start[length] = '\0';
return NXT_OK;
}
static void
nxt_php_str_trim_trail(nxt_str_t *str, u_char t)
{
while (str->length > 0 && str->start[str->length - 1] == t) {
str->length--;
}
str->start[str->length] = '\0';
}
static void
nxt_php_str_trim_lead(nxt_str_t *str, u_char t)
{
while (str->length > 0 && str->start[0] == t) {
str->length--;
str->start++;
}
}
nxt_inline u_char *
nxt_realpath(const void *c)
{
return (u_char *) realpath(c, NULL);
}
static nxt_int_t
nxt_php_do_301(nxt_unit_request_info_t *req)
{
char *p, *url, *port;
uint32_t size;
const char *proto;
nxt_unit_request_t *r;
r = req->request;
url = nxt_malloc(sizeof("https://") - 1
+ r->server_name_length
+ r->local_port_length + 1
+ r->path_length + 1
+ r->query_length + 1
+ 1);
if (nxt_slow_path(url == NULL)) {
return NXT_UNIT_ERROR;
}
proto = r->tls ? "https://" : "http://";
p = nxt_cpymem(url, proto, strlen(proto));
p = nxt_cpymem(p, nxt_unit_sptr_get(&r->server_name),
r->server_name_length);
port = nxt_unit_sptr_get(&r->local_port);
if (r->local_port_length > 0
&& !(r->tls && strcmp(port, "443") == 0)
&& !(!r->tls && strcmp(port, "80") == 0))
{
*p++ = ':';
p = nxt_cpymem(p, port, r->local_port_length);
}
p = nxt_cpymem(p, nxt_unit_sptr_get(&r->path), r->path_length);
*p++ = '/';
if (r->query_length > 0) {
*p++ = '?';
p = nxt_cpymem(p, nxt_unit_sptr_get(&r->query), r->query_length);
}
*p = '\0';
size = p - url;
nxt_unit_response_init(req, NXT_HTTP_MOVED_PERMANENTLY, 1,
nxt_length("Location") + size);
nxt_unit_response_add_field(req, "Location", nxt_length("Location"),
url, size);
nxt_free(url);
return NXT_UNIT_OK;
}
static nxt_int_t
nxt_php_handle_fs_err(nxt_unit_request_info_t *req)
{
switch (nxt_errno) {
case ELOOP:
case EACCES:
case ENFILE:
return nxt_unit_response_init(req, NXT_HTTP_FORBIDDEN, 0, 0);
case ENOENT:
case ENOTDIR:
case ENAMETOOLONG:
return nxt_unit_response_init(req, NXT_HTTP_NOT_FOUND, 0, 0);
}
return NXT_UNIT_ERROR;
}
static void
nxt_php_request_handler(nxt_unit_request_info_t *req)
{
nxt_php_target_t *target;
nxt_php_run_ctx_t ctx;
nxt_unit_request_t *r;
r = req->request;
target = &nxt_php_targets[r->app_target];
nxt_memzero(&ctx, sizeof(ctx));
ctx.req = req;
ctx.root = &target->root;
ctx.index = &target->index;
if (target->script_filename.length == 0) {
nxt_php_dynamic_request(&ctx, r);
return;
}
ctx.script_filename = target->script_filename;
ctx.script_dirname = target->script_dirname;
ctx.script_name = target->script_name;
ctx.chdir = (r->app_target != nxt_php_last_target);
nxt_php_execute(&ctx, r);
nxt_php_last_target = ctx.chdir ? -1 : r->app_target;
}
static void
nxt_php_dynamic_request(nxt_php_run_ctx_t *ctx, nxt_unit_request_t *r)
{
u_char *p;
nxt_str_t path, script_name;
nxt_int_t ret;
path.length = r->path_length;
path.start = nxt_unit_sptr_get(&r->path);
nxt_str_null(&script_name);
ctx->path_info.start = memmem(path.start, path.length, ".php/",
strlen(".php/"));
if (ctx->path_info.start != NULL) {
ctx->path_info.start += 4;
path.length = ctx->path_info.start - path.start;
ctx->path_info.length = r->path_length - path.length;
} else if (path.start[path.length - 1] == '/') {
script_name = *ctx->index;
} else if (path.length < 4
|| memcmp(path.start + (path.length - 4), ".php", 4) != 0)
{
char tpath[PATH_MAX];
nxt_int_t ec;
struct stat sb;
ec = NXT_UNIT_ERROR;
if (ctx->root->length + path.length + 1 > PATH_MAX) {
nxt_unit_request_done(ctx->req, ec);
return;
}
p = nxt_cpymem(tpath, ctx->root->start, ctx->root->length);
p = nxt_cpymem(p, path.start, path.length);
*p = '\0';
ret = stat(tpath, &sb);
if (ret == 0 && S_ISDIR(sb.st_mode)) {
ec = nxt_php_do_301(ctx->req);
} else if (ret == -1) {
ec = nxt_php_handle_fs_err(ctx->req);
}
nxt_unit_request_done(ctx->req, ec);
return;
}
ctx->script_filename.length = ctx->root->length
+ path.length
+ script_name.length;
p = nxt_malloc(ctx->script_filename.length + 1);
if (nxt_slow_path(p == NULL)) {
nxt_unit_request_done(ctx->req, NXT_UNIT_ERROR);
return;
}
ctx->script_filename.start = p;
ctx->script_name.length = path.length + script_name.length;
ctx->script_name.start = p + ctx->root->length;
p = nxt_cpymem(p, ctx->root->start, ctx->root->length);
p = nxt_cpymem(p, path.start, path.length);
if (script_name.length > 0) {
p = nxt_cpymem(p, script_name.start, script_name.length);
}
*p = '\0';
ctx->chdir = 1;
ret = nxt_php_dirname(&ctx->script_filename, &ctx->script_dirname);
if (nxt_slow_path(ret != NXT_OK)) {
nxt_unit_request_done(ctx->req, NXT_UNIT_ERROR);
nxt_free(ctx->script_filename.start);
return;
}
nxt_php_execute(ctx, r);
nxt_free(ctx->script_filename.start);
nxt_free(ctx->script_dirname.start);
nxt_php_last_target = -1;
}
#if (PHP_VERSION_ID < 70400)
static void
nxt_zend_stream_init_fp(zend_file_handle *handle, FILE *fp,
const char *filename)
{
nxt_memzero(handle, sizeof(zend_file_handle));
handle->type = ZEND_HANDLE_FP;
handle->handle.fp = fp;
handle->filename = filename;
}
#else
#define nxt_zend_stream_init_fp zend_stream_init_fp
#endif
static void
nxt_php_execute(nxt_php_run_ctx_t *ctx, nxt_unit_request_t *r)
{
FILE *fp;
#if (PHP_VERSION_ID < 50600)
void *read_post;
#endif
const char *filename;
nxt_unit_field_t *f;
zend_file_handle file_handle;
filename = (const char *) ctx->script_filename.start;
nxt_unit_req_debug(ctx->req, "PHP execute script %s", filename);
fp = fopen(filename, "re");
if (fp == NULL) {
nxt_int_t ec;
nxt_unit_req_debug(ctx->req, "PHP fopen(\"%s\") failed", filename);
ec = nxt_php_handle_fs_err(ctx->req);
nxt_unit_request_done(ctx->req, ec);
return;
}
SG(server_context) = ctx;
SG(options) |= SAPI_OPTION_NO_CHDIR;
SG(request_info).request_uri = nxt_unit_sptr_get(&r->target);
SG(request_info).request_method = nxt_unit_sptr_get(&r->method);
SG(request_info).proto_num = 1001;
SG(request_info).query_string = r->query.offset
? nxt_unit_sptr_get(&r->query) : NULL;
SG(request_info).content_length = r->content_length;
if (r->content_type_field != NXT_UNIT_NONE_FIELD) {
f = r->fields + r->content_type_field;
SG(request_info).content_type = nxt_unit_sptr_get(&f->value);
}
if (r->cookie_field != NXT_UNIT_NONE_FIELD) {
f = r->fields + r->cookie_field;
ctx->cookie = nxt_unit_sptr_get(&f->value);
}
if (r->authorization_field != NXT_UNIT_NONE_FIELD) {
f = r->fields + r->authorization_field;
#ifdef NXT_PHP7
php_handle_auth_data(nxt_unit_sptr_get(&f->value));
#else
php_handle_auth_data(nxt_unit_sptr_get(&f->value) TSRMLS_CC);
#endif
} else {
SG(request_info).auth_digest = NULL;
SG(request_info).auth_user = NULL;
SG(request_info).auth_password = NULL;
}
SG(sapi_headers).http_response_code = 200;
SG(request_info).path_translated = NULL;
#ifdef NXT_PHP7
if (nxt_slow_path(php_request_startup() == FAILURE)) {
#else
if (nxt_slow_path(php_request_startup(TSRMLS_C) == FAILURE)) {
#endif
nxt_unit_req_debug(ctx->req, "php_request_startup() failed");
nxt_unit_request_done(ctx->req, NXT_UNIT_ERROR);
fclose(fp);
return;
}
if (ctx->chdir) {
ctx->chdir = 0;
nxt_php_vcwd_chdir(ctx->req, ctx->script_dirname.start);
}
nxt_zend_stream_init_fp(&file_handle, fp, filename);
php_execute_script(&file_handle TSRMLS_CC);
#if (PHP_VERSION_ID >= 80100)
zend_destroy_file_handle(&file_handle);
#endif
/* Prevention of consuming possible unread request body. */
#if (PHP_VERSION_ID < 50600)
read_post = sapi_module.read_post;
sapi_module.read_post = NULL;
#else
SG(post_read) = 1;
#endif
php_request_shutdown(NULL);
if (ctx->req != NULL) {
nxt_unit_request_done(ctx->req, NXT_UNIT_OK);
}
#if (PHP_VERSION_ID < 50600)
sapi_module.read_post = read_post;
#endif
}
nxt_inline void
nxt_php_vcwd_chdir(nxt_unit_request_info_t *req, u_char *dir)
{
if (nxt_slow_path(VCWD_CHDIR((char *) dir) != 0)) {
nxt_unit_req_alert(req, "VCWD_CHDIR(%s) failed (%d: %s)",
dir, errno, strerror(errno));
}
}
static int
nxt_php_startup(sapi_module_struct *sapi_module)
{
#if (PHP_VERSION_ID < 80200)
return php_module_startup(sapi_module, &nxt_php_unit_module, 1);
#else
return php_module_startup(sapi_module, &nxt_php_unit_module);
#endif
}
#ifdef NXT_PHP7
static size_t
nxt_php_unbuffered_write(const char *str, size_t str_length TSRMLS_DC)
#else
static int
nxt_php_unbuffered_write(const char *str, uint str_length TSRMLS_DC)
#endif
{
int rc;
nxt_php_run_ctx_t *ctx;
ctx = SG(server_context);
rc = nxt_unit_response_write(ctx->req, str, str_length);
if (nxt_fast_path(rc == NXT_UNIT_OK)) {
return str_length;
}
php_handle_aborted_connection();
return 0;
}
static int
nxt_php_send_headers(sapi_headers_struct *sapi_headers TSRMLS_DC)
{
int rc, fields_count;
char *colon, *value;
uint16_t status;
uint32_t resp_size;
nxt_php_run_ctx_t *ctx;
sapi_header_struct *h;
zend_llist_position zpos;
nxt_unit_request_info_t *req;
ctx = SG(server_context);
req = ctx->req;
nxt_unit_req_debug(req, "nxt_php_send_headers");
if (SG(request_info).no_headers == 1) {
rc = nxt_unit_response_init(req, 200, 0, 0);
if (nxt_slow_path(rc != NXT_UNIT_OK)) {
return SAPI_HEADER_SEND_FAILED;
}
return SAPI_HEADER_SENT_SUCCESSFULLY;
}
resp_size = 0;
fields_count = zend_llist_count(&sapi_headers->headers);
for (h = zend_llist_get_first_ex(&sapi_headers->headers, &zpos);
h;
h = zend_llist_get_next_ex(&sapi_headers->headers, &zpos))
{
resp_size += h->header_len;
}
status = SG(sapi_headers).http_response_code;
rc = nxt_unit_response_init(req, status, fields_count, resp_size);
if (nxt_slow_path(rc != NXT_UNIT_OK)) {
return SAPI_HEADER_SEND_FAILED;
}
for (h = zend_llist_get_first_ex(&sapi_headers->headers, &zpos);
h;
h = zend_llist_get_next_ex(&sapi_headers->headers, &zpos))
{
colon = memchr(h->header, ':', h->header_len);
if (nxt_slow_path(colon == NULL)) {
nxt_unit_req_warn(req, "colon not found in header '%.*s'",
(int) h->header_len, h->header);
continue;
}
value = colon + 1;
while(isspace(*value)) {
value++;
}
nxt_unit_response_add_field(req, h->header, colon - h->header,
value,
h->header_len - (value - h->header));
}
rc = nxt_unit_response_send(req);
if (nxt_slow_path(rc != NXT_UNIT_OK)) {
nxt_unit_req_debug(req, "failed to send response");
return SAPI_HEADER_SEND_FAILED;
}
return SAPI_HEADER_SENT_SUCCESSFULLY;
}
#ifdef NXT_PHP7
static size_t
nxt_php_read_post(char *buffer, size_t count_bytes TSRMLS_DC)
#else
static int
nxt_php_read_post(char *buffer, uint count_bytes TSRMLS_DC)
#endif
{
nxt_php_run_ctx_t *ctx;
ctx = SG(server_context);
nxt_unit_req_debug(ctx->req, "nxt_php_read_post %d", (int) count_bytes);
return nxt_unit_request_read(ctx->req, buffer, count_bytes);
}
static char *
nxt_php_read_cookies(TSRMLS_D)
{
nxt_php_run_ctx_t *ctx;
ctx = SG(server_context);
nxt_unit_req_debug(ctx->req, "nxt_php_read_cookies");
return ctx->cookie;
}
static void
nxt_php_register_variables(zval *track_vars_array TSRMLS_DC)
{
const char *name;
nxt_unit_field_t *f, *f_end;
nxt_php_run_ctx_t *ctx;
nxt_unit_request_t *r;
nxt_unit_request_info_t *req;
ctx = SG(server_context);
req = ctx->req;
r = req->request;
nxt_unit_req_debug(req, "nxt_php_register_variables");
php_register_variable_safe((char *) "SERVER_SOFTWARE",
(char *) nxt_server.start,
nxt_server.length, track_vars_array TSRMLS_CC);
nxt_php_set_sptr(req, "SERVER_PROTOCOL", &r->version, r->version_length,
track_vars_array TSRMLS_CC);
/*
* 'PHP_SELF'
* The filename of the currently executing script, relative to the document
* root. For instance, $_SERVER['PHP_SELF'] in a script at the address
* http://example.com/foo/bar.php would be /foo/bar.php. The __FILE__
* constant contains the full path and filename of the current (i.e.
* included) file. If PHP is running as a command-line processor this
* variable contains the script name since PHP 4.3.0. Previously it was not
* available.
*/
if (ctx->path_info.length != 0) {
nxt_php_set_sptr(req, "PHP_SELF", &r->path, r->path_length,
track_vars_array TSRMLS_CC);
nxt_php_set_str(req, "PATH_INFO", &ctx->path_info,
track_vars_array TSRMLS_CC);
} else {
nxt_php_set_str(req, "PHP_SELF", &ctx->script_name,
track_vars_array TSRMLS_CC);
}
/*
* 'SCRIPT_NAME'
* Contains the current script's path. This is useful for pages which need
* to point to themselves. The __FILE__ constant contains the full path and
* filename of the current (i.e. included) file.
*/
nxt_php_set_str(req, "SCRIPT_NAME", &ctx->script_name,
track_vars_array TSRMLS_CC);
/*
* 'SCRIPT_FILENAME'
* The absolute pathname of the currently executing script.
*/
nxt_php_set_str(req, "SCRIPT_FILENAME", &ctx->script_filename,
track_vars_array TSRMLS_CC);
/*
* 'DOCUMENT_ROOT'
* The document root directory under which the current script is executing,
* as defined in the server's configuration file.
*/
nxt_php_set_str(req, "DOCUMENT_ROOT", ctx->root,
track_vars_array TSRMLS_CC);
nxt_php_set_sptr(req, "REQUEST_METHOD", &r->method, r->method_length,
track_vars_array TSRMLS_CC);
nxt_php_set_sptr(req, "REQUEST_URI", &r->target, r->target_length,
track_vars_array TSRMLS_CC);
nxt_php_set_sptr(req, "QUERY_STRING", &r->query, r->query_length,
track_vars_array TSRMLS_CC);
nxt_php_set_sptr(req, "REMOTE_ADDR", &r->remote, r->remote_length,
track_vars_array TSRMLS_CC);
nxt_php_set_sptr(req, "SERVER_ADDR", &r->local_addr, r->local_addr_length,
track_vars_array TSRMLS_CC);
nxt_php_set_sptr(req, "SERVER_NAME", &r->server_name, r->server_name_length,
track_vars_array TSRMLS_CC);
nxt_php_set_cstr(req, "SERVER_PORT", "80", 2, track_vars_array TSRMLS_CC);
if (r->tls) {
nxt_php_set_cstr(req, "HTTPS", "on", 2, track_vars_array TSRMLS_CC);
}
f_end = r->fields + r->fields_count;
for (f = r->fields; f < f_end; f++) {
name = nxt_unit_sptr_get(&f->name);
nxt_php_set_sptr(req, name, &f->value, f->value_length,
track_vars_array TSRMLS_CC);
}
if (r->content_length_field != NXT_UNIT_NONE_FIELD) {
f = r->fields + r->content_length_field;
nxt_php_set_sptr(req, "CONTENT_LENGTH", &f->value, f->value_length,
track_vars_array TSRMLS_CC);
}
if (r->content_type_field != NXT_UNIT_NONE_FIELD) {
f = r->fields + r->content_type_field;
nxt_php_set_sptr(req, "CONTENT_TYPE", &f->value, f->value_length,
track_vars_array TSRMLS_CC);
}
}
static void
nxt_php_set_sptr(nxt_unit_request_info_t *req, const char *name,
nxt_unit_sptr_t *v, uint32_t len, zval *track_vars_array TSRMLS_DC)
{
char *str;
#if NXT_PHP7
size_t new_len;
#else
unsigned int new_len;
#endif
str = nxt_unit_sptr_get(v);
nxt_unit_req_debug(req, "php: register %s='%.*s'", name, (int) len, str);
if (sapi_module.input_filter(PARSE_SERVER, (char *) name, &str, len,
&new_len TSRMLS_CC))
{
php_register_variable_safe((char *) name, str, new_len,
track_vars_array TSRMLS_CC);
}
}
nxt_inline void
nxt_php_set_str(nxt_unit_request_info_t *req, const char *name,
nxt_str_t *s, zval *track_vars_array TSRMLS_DC)
{
nxt_php_set_cstr(req, name, (char *) s->start, s->length,
track_vars_array TSRMLS_CC);
}
#ifdef NXT_PHP7
static void *
nxt_php_hash_str_find_ptr(const HashTable *ht, const nxt_str_t *str)
{
return zend_hash_str_find_ptr(ht, (const char *) str->start, str->length);
}
#else
static void *
nxt_php_hash_str_find_ptr(const HashTable *ht, const nxt_str_t *str)
{
int ret;
void *entry;
char buf[256];
if (nxt_slow_path(str->length >= (sizeof(buf) - 1))) {
return NULL;
}
nxt_memcpy(buf, str->start, str->length);
buf[str->length] = '\0';
ret = zend_hash_find(ht, buf, str->length + 1, &entry);
if (nxt_fast_path(ret == SUCCESS)) {
return entry;
}
return NULL;
}
#endif
static void
nxt_php_set_cstr(nxt_unit_request_info_t *req, const char *name,
const char *cstr, uint32_t len, zval *track_vars_array TSRMLS_DC)
{
if (nxt_slow_path(cstr == NULL)) {
return;
}
nxt_unit_req_debug(req, "php: register %s='%.*s'", name, (int) len, cstr);
php_register_variable_safe((char *) name, (char *) cstr, len,
track_vars_array TSRMLS_CC);
}
#if NXT_PHP8
static void
nxt_php_log_message(const char *message, int syslog_type_int)
#else
#ifdef NXT_HAVE_PHP_LOG_MESSAGE_WITH_SYSLOG_TYPE
static void
nxt_php_log_message(char *message, int syslog_type_int)
#else
static void
nxt_php_log_message(char *message TSRMLS_DC)
#endif
#endif
{
nxt_php_run_ctx_t *ctx;
ctx = SG(server_context);
if (ctx != NULL) {
nxt_unit_req_log(ctx->req, NXT_UNIT_LOG_NOTICE,
"php message: %s", message);
} else {
nxt_unit_log(nxt_php_unit_ctx, NXT_UNIT_LOG_NOTICE,
"php message: %s", message);
}
}
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