php-src/sapi/apache2handler/sapi_apache2.c at master · arshidkv12/php-src · GitHub

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+----------------------------------------------------------------------+

| This source file is subject to the Modified BSD License that is |

| bundled with this package in the file LICENSE, and is available |

| through the World Wide Web at <https://www.php.net/license/>. |

| |

| SPDX-License-Identifier: BSD-3-Clause |

+----------------------------------------------------------------------+

| Authors: Sascha Schumann <sascha@schumann.cx> |

| Parts based on Apache 1.3 SAPI module by |

| Rasmus Lerdorf and Zeev Suraski |

+----------------------------------------------------------------------+

#define ZEND_INCLUDE_FULL_WINDOWS_HEADERS

#include "php.h"

#ifdef strcasecmp

# undef strcasecmp

#endif

#ifdef strncasecmp

# undef strncasecmp

#endif

#include "php_main.h"

#include "php_ini.h"

#include "php_variables.h"

#include "SAPI.h"

#include <fcntl.h>

#include "zend_smart_str.h"

#include "ext/standard/php_standard.h"

#include "apr_strings.h"

#include "ap_config.h"

#include "util_filter.h"

#include "httpd.h"

#include "http_config.h"

#include "http_request.h"

#include "http_core.h"

#include "http_protocol.h"

#include "http_log.h"

#include "http_main.h"

#include "util_script.h"

#include "ap_mpm.h"

#include "php_apache.h"

/* UnixWare define shutdown to _shutdown, which causes problems later

* on when using a structure member named shutdown. Since this source

* file does not use the system call shutdown, it is safe to #undef it.

#undef shutdown

#define PHP_MAGIC_TYPE "application/x-httpd-php"

#define PHP_SOURCE_MAGIC_TYPE "application/x-httpd-php-source"

#define PHP_SCRIPT "php-script"

/* A way to specify the location of the php.ini dir in an apache directive */

char *apache2_php_ini_path_override = NULL;

#if defined(PHP_WIN32) && defined(ZTS)

ZEND_TSRMLS_CACHE_DEFINE()

#endif

static size_t

php_apache_sapi_ub_write(const char *str, size_t str_length)

{

request_rec *r;

php_struct *ctx;

ctx = SG(server_context);

r = ctx->r;

if (ap_rwrite(str, str_length, r) < 0) {

php_handle_aborted_connection();

}

return str_length; /* we always consume all the data passed to us. */

}

static int

php_apache_sapi_header_handler(sapi_header_struct *sapi_header, sapi_header_op_enum op, sapi_headers_struct *sapi_headers)

{

php_struct *ctx;

char *val, *ptr;

ctx = SG(server_context);

switch (op) {

case SAPI_HEADER_DELETE:

apr_table_unset(ctx->r->headers_out, sapi_header->header);

return 0;

case SAPI_HEADER_DELETE_ALL:

apr_table_clear(ctx->r->headers_out);

return 0;

case SAPI_HEADER_ADD:

case SAPI_HEADER_REPLACE:

val = strchr(sapi_header->header, ':');

if (!val) {

return 0;

}

ptr = val;

*val = '\0';

do {

val++;

} while (*val == ' ');

if (!strcasecmp(sapi_header->header, "content-type")) {

if (ctx->content_type) {

efree(ctx->content_type);

}

ctx->content_type = estrdup(val);

} else if (!strcasecmp(sapi_header->header, "content-length")) {

apr_off_t clen = 0;

if (APR_SUCCESS != apr_strtoff(&clen, val, (char **) NULL, 10)) {

/* We'll fall back to strtol, since that's what we used to

* do anyway. */

clen = (apr_off_t) strtol(val, (char **) NULL, 10);

}

ap_set_content_length(ctx->r, clen);

} else if (op == SAPI_HEADER_REPLACE) {

apr_table_set(ctx->r->headers_out, sapi_header->header, val);

} else {

apr_table_add(ctx->r->headers_out, sapi_header->header, val);

}

*ptr = ':';

return SAPI_HEADER_ADD;

default:

return 0;

}

static int

php_apache_sapi_send_headers(sapi_headers_struct *sapi_headers)

{

php_struct *ctx = SG(server_context);

const char *sline = SG(sapi_headers).http_status_line;

ctx->r->status = SG(sapi_headers).http_response_code;

/* httpd requires that r->status_line is set to the first digit of

* the status-code: */

if (sline && strlen(sline) > 12 && strncmp(sline, "HTTP/1.", 7) == 0 && sline[8] == ' ') {

ctx->r->status_line = apr_pstrdup(ctx->r->pool, sline + 9);

ctx->r->proto_num = 1000 + (sline[7]-'0');

if ((sline[7]-'0') == 0) {

apr_table_set(ctx->r->subprocess_env, "force-response-1.0", "true");

}

/* call ap_set_content_type only once, else each time we call it,

configured output filters for that content type will be added */

if (!ctx->content_type) {

ctx->content_type = sapi_get_default_content_type();

}

ap_set_content_type(ctx->r, apr_pstrdup(ctx->r->pool, ctx->content_type));

efree(ctx->content_type);

ctx->content_type = NULL;

return SAPI_HEADER_SENT_SUCCESSFULLY;

}

static apr_size_t

php_apache_sapi_read_post(char *buf, size_t count_bytes)

{

apr_size_t len, tlen=0;

php_struct *ctx = SG(server_context);

request_rec *r;

apr_bucket_brigade *brigade;

apr_status_t status;

r = ctx->r;

brigade = ctx->brigade;

len = count_bytes;

* This loop is needed because ap_get_brigade() can return us partial data

* which would cause premature termination of request read. Therefore we

* need to make sure that if data is available we fill the buffer completely.

while ((status = ap_get_brigade(r->input_filters, brigade, AP_MODE_READBYTES, APR_BLOCK_READ, len)) == APR_SUCCESS) {

apr_brigade_flatten(brigade, buf, &len);

apr_brigade_cleanup(brigade);

tlen += len;

if (tlen == count_bytes || !len) {

break;

}

buf += len;

len = count_bytes - tlen;

}

if (status != APR_SUCCESS) {

return 0;

}

return tlen;

}

static zend_stat_t*

php_apache_sapi_get_stat(void)

{

php_struct *ctx = SG(server_context);

#ifdef PHP_WIN32

ctx->finfo.st_uid = 0;

ctx->finfo.st_gid = 0;

#else

ctx->finfo.st_uid = ctx->r->finfo.user;

ctx->finfo.st_gid = ctx->r->finfo.group;

#endif

ctx->finfo.st_dev = ctx->r->finfo.device;

ctx->finfo.st_ino = ctx->r->finfo.inode;

ctx->finfo.st_atime = apr_time_sec(ctx->r->finfo.atime);

ctx->finfo.st_mtime = apr_time_sec(ctx->r->finfo.mtime);

ctx->finfo.st_ctime = apr_time_sec(ctx->r->finfo.ctime);

ctx->finfo.st_size = ctx->r->finfo.size;

ctx->finfo.st_nlink = ctx->r->finfo.nlink;

return &ctx->finfo;

}

static char *

php_apache_sapi_read_cookies(void)

{

php_struct *ctx = SG(server_context);

const char *http_cookie;

http_cookie = apr_table_get(ctx->r->headers_in, "cookie");

/* The SAPI interface should use 'const char *' */

return (char *) http_cookie;

}

static char *

php_apache_sapi_getenv(const char *name, size_t name_len)

{

php_struct *ctx = SG(server_context);

const char *env_var;

if (ctx == NULL) {

return NULL;

}

env_var = apr_table_get(ctx->r->subprocess_env, name);

return (char *) env_var;

}

static void

php_apache_sapi_register_variables(zval *track_vars_array)

{

php_struct *ctx = SG(server_context);

const apr_array_header_t *arr = apr_table_elts(ctx->r->subprocess_env);

char *key, *val;

size_t new_val_len;

APR_ARRAY_FOREACH_OPEN(arr, key, val) {

if (!val) {

val = "";

}

if (sapi_module.input_filter(PARSE_SERVER, key, &val, strlen(val), &new_val_len)) {

php_register_variable_safe(key, val, new_val_len, track_vars_array);

}

} APR_ARRAY_FOREACH_CLOSE();

if (sapi_module.input_filter(PARSE_SERVER, "PHP_SELF", &ctx->r->uri, strlen(ctx->r->uri), &new_val_len)) {

php_register_variable_safe("PHP_SELF", ctx->r->uri, new_val_len, track_vars_array);

}

static void

php_apache_sapi_flush(void *server_context)

{

php_struct *ctx;

request_rec *r;

ctx = server_context;

/* If we haven't registered a server_context yet,

* then don't bother flushing. */

if (!server_context) {

return;

}

r = ctx->r;

sapi_send_headers();

r->status = SG(sapi_headers).http_response_code;

SG(headers_sent) = 1;

if (ap_rflush(r) < 0 || r->connection->aborted) {

php_handle_aborted_connection();

}

static void php_apache_sapi_log_message(const char *msg, int syslog_type_int)

{

php_struct *ctx;

int aplog_type = APLOG_ERR;

ctx = SG(server_context);

switch (syslog_type_int) {

#if LOG_EMERG != LOG_CRIT

case LOG_EMERG:

aplog_type = APLOG_EMERG;

break;

#endif

#if LOG_ALERT != LOG_CRIT

case LOG_ALERT:

aplog_type = APLOG_ALERT;

break;

#endif

case LOG_CRIT:

aplog_type = APLOG_CRIT;

break;

case LOG_ERR:

aplog_type = APLOG_ERR;

break;

case LOG_WARNING:

aplog_type = APLOG_WARNING;

break;

case LOG_NOTICE:

aplog_type = APLOG_NOTICE;

break;

#if LOG_INFO != LOG_NOTICE

case LOG_INFO:

aplog_type = APLOG_INFO;

break;

#endif

#if LOG_NOTICE != LOG_DEBUG

case LOG_DEBUG:

aplog_type = APLOG_DEBUG;

break;

#endif

}

if (ctx == NULL) { /* we haven't initialized our ctx yet, oh well */

ap_log_error(APLOG_MARK, APLOG_ERR | APLOG_STARTUP, 0, NULL, "%s", msg);

} else {

ap_log_rerror(APLOG_MARK, aplog_type, 0, ctx->r, "%s", msg);

}

static void php_apache_sapi_log_message_ex(const char *msg, request_rec *r)

{

if (r) {

ap_log_rerror(APLOG_MARK, APLOG_ERR, 0, r, msg, r->filename);

} else {

php_apache_sapi_log_message(msg, -1);

}

static zend_result php_apache_sapi_get_request_time(double *request_time)

{

php_struct *ctx = SG(server_context);

if (!ctx) {

return FAILURE;

}

*request_time = ((double) ctx->r->request_time) / 1000000.0;

return SUCCESS;

}

extern zend_module_entry php_apache_module;

static int php_apache2_startup(sapi_module_struct *sapi_module)

{

return php_module_startup(sapi_module, &php_apache_module);

}

static sapi_module_struct apache2_sapi_module = {

"apache2handler",

"Apache 2 Handler",

php_apache2_startup, /* startup */

php_module_shutdown_wrapper, /* shutdown */

NULL, /* activate */

NULL, /* deactivate */

php_apache_sapi_ub_write, /* unbuffered write */

php_apache_sapi_flush, /* flush */

php_apache_sapi_get_stat, /* get uid */

php_apache_sapi_getenv, /* getenv */

php_error, /* error handler */

php_apache_sapi_header_handler, /* header handler */

php_apache_sapi_send_headers, /* send headers handler */

NULL, /* send header handler */

php_apache_sapi_read_post, /* read POST data */

php_apache_sapi_read_cookies, /* read Cookies */

php_apache_sapi_register_variables,

php_apache_sapi_log_message, /* Log message */

php_apache_sapi_get_request_time, /* Request Time */

NULL, /* Child Terminate */

STANDARD_SAPI_MODULE_PROPERTIES

};

static apr_status_t php_apache_server_shutdown(void *tmp)

{

apache2_sapi_module.shutdown(&apache2_sapi_module);

sapi_shutdown();

#ifdef ZTS

tsrm_shutdown();

#endif

return APR_SUCCESS;

}

static apr_status_t php_apache_child_shutdown(void *tmp)

{

apache2_sapi_module.shutdown(&apache2_sapi_module);

#if defined(ZTS) && !defined(PHP_WIN32)

tsrm_shutdown();

#endif

return APR_SUCCESS;

}

static void php_apache_add_version(apr_pool_t *p)

{

if (PG(expose_php)) {

ap_add_version_component(p, "PHP/" PHP_VERSION);

}

static int php_pre_config(apr_pool_t *pconf, apr_pool_t *plog, apr_pool_t *ptemp)

{

#ifndef ZTS

int threaded_mpm;

ap_mpm_query(AP_MPMQ_IS_THREADED, &threaded_mpm);

if(threaded_mpm) {

ap_log_error(APLOG_MARK, APLOG_CRIT, 0, 0, "Apache is running a threaded MPM, but your PHP Module is not compiled to be threadsafe. You need to recompile PHP.");

return DONE;

}

#endif

/* When this is NULL, apache won't override the hard-coded default

* php.ini path setting. */

apache2_php_ini_path_override = NULL;

return OK;

}

static int

php_apache_server_startup(apr_pool_t *pconf, apr_pool_t *plog, apr_pool_t *ptemp, server_rec *s)

{

void *data = NULL;

const char *userdata_key = "apache2hook_post_config";

zend_set_dl_use_deepbind(true);

/* Apache will load, unload and then reload a DSO module. This

* prevents us from starting PHP until the second load. */

apr_pool_userdata_get(&data, userdata_key, s->process->pool);

if (data == NULL) {

/* We must use set() here and *not* setn(), otherwise the

* static string pointed to by userdata_key will be mapped

* to a different location when the DSO is reloaded and the

* pointers won't match, causing get() to return NULL when

* we expected it to return non-NULL. */

apr_pool_userdata_set((const void *)1, userdata_key, apr_pool_cleanup_null, s->process->pool);

return OK;

}

/* Set up our overridden path. */

if (apache2_php_ini_path_override) {

apache2_sapi_module.php_ini_path_override = apache2_php_ini_path_override;

}

#ifdef ZTS

int expected_threads;

if (ap_mpm_query(AP_MPMQ_MAX_THREADS, &expected_threads) != APR_SUCCESS) {

expected_threads = 1;

}

php_tsrm_startup_ex(expected_threads);

# ifdef PHP_WIN32

ZEND_TSRMLS_CACHE_UPDATE();

# endif

#endif

zend_signal_startup();

sapi_startup(&apache2_sapi_module);

if (apache2_sapi_module.startup(&apache2_sapi_module) != SUCCESS) {

return DONE;

}

apr_pool_cleanup_register(pconf, NULL, php_apache_server_shutdown, apr_pool_cleanup_null);

php_apache_add_version(pconf);

return OK;

}

static apr_status_t php_server_context_cleanup(void *data_)

{

void **data = data_;

*data = NULL;

return APR_SUCCESS;

}

static int php_apache_request_ctor(request_rec *r, php_struct *ctx)

{

char *content_length;

const char *auth;

SG(sapi_headers).http_response_code = !r->status ? HTTP_OK : r->status;

SG(request_info).content_type = apr_table_get(r->headers_in, "Content-Type");

SG(request_info).query_string = apr_pstrdup(r->pool, r->args);

SG(request_info).request_method = r->method;

SG(request_info).proto_num = r->proto_num;

SG(request_info).request_uri = apr_pstrdup(r->pool, r->uri);

SG(request_info).path_translated = apr_pstrdup(r->pool, r->filename);

r->no_local_copy = 1;

content_length = (char *) apr_table_get(r->headers_in, "Content-Length");

if (content_length) {

SG(request_info).content_length = ZEND_ATOL(content_length);

} else {

SG(request_info).content_length = 0;

}

apr_table_unset(r->headers_out, "Content-Length");

apr_table_unset(r->headers_out, "Last-Modified");

apr_table_unset(r->headers_out, "Expires");

apr_table_unset(r->headers_out, "ETag");

auth = apr_table_get(r->headers_in, "Authorization");

php_handle_auth_data(auth);

if (SG(request_info).auth_user == NULL && r->user) {

SG(request_info).auth_user = estrdup(r->user);

}

ctx->r->user = apr_pstrdup(ctx->r->pool, SG(request_info).auth_user);

return php_request_startup();

}

static void php_apache_request_dtor(request_rec *r)

{

php_request_shutdown(NULL);

}

static void php_apache_ini_dtor(request_rec *r, request_rec *p)

{

if (strcmp(r->protocol, "INCLUDED")) {

zend_try { zend_ini_deactivate(); } zend_end_try();

} else {

typedef struct {

HashTable config;

} php_conf_rec;

zend_string *str;

php_conf_rec *c = ap_get_module_config(r->per_dir_config, &php_module);

ZEND_HASH_MAP_FOREACH_STR_KEY(&c->config, str) {

zend_restore_ini_entry(str, ZEND_INI_STAGE_SHUTDOWN);

} ZEND_HASH_FOREACH_END();

}

if (p) {

((php_struct *)SG(server_context))->r = p;

} else {

apr_pool_cleanup_run(r->pool, (void *)&SG(server_context), php_server_context_cleanup);

}

static int php_handler(request_rec *r)

{

php_struct * volatile ctx;

void *conf;

apr_bucket_brigade * volatile brigade;

apr_bucket *bucket;

apr_status_t rv;

request_rec * volatile parent_req = NULL;

#ifdef ZTS

/* initial resource fetch */

(void)ts_resource(0);

# ifdef PHP_WIN32

ZEND_TSRMLS_CACHE_UPDATE();

# endif

#endif

#define PHPAP_INI_OFF php_apache_ini_dtor(r, parent_req);

conf = ap_get_module_config(r->per_dir_config, &php_module);

/* apply_config() needs r in some cases, so allocate server_context early */

ctx = SG(server_context);

if (ctx == NULL || (ctx && ctx->request_processed && !strcmp(r->protocol, "INCLUDED"))) {

normal:

ctx = SG(server_context) = apr_pcalloc(r->pool, sizeof(*ctx));

/* register a cleanup so we clear out the SG(server_context)

* after each request. Note: We pass in the pointer to the

* server_context in case this is handled by a different thread.

apr_pool_cleanup_register(r->pool, (void *)&SG(server_context), php_server_context_cleanup, apr_pool_cleanup_null);

ctx->r = r;

ctx = NULL; /* May look weird to null it here, but it is to catch the right case in the first_try later on */

} else {

parent_req = ctx->r;

ctx->r = r;

}

apply_config(conf);

if (strcmp(r->handler, PHP_MAGIC_TYPE) && strcmp(r->handler, PHP_SOURCE_MAGIC_TYPE) && strcmp(r->handler, PHP_SCRIPT)) {

/* Check for xbithack in this case. */

if (!AP2(xbithack) || strcmp(r->handler, "text/html") || !(r->finfo.protection & APR_UEXECUTE)) {

PHPAP_INI_OFF;

return DECLINED;

}

/* Give a 404 if PATH_INFO is used but is explicitly disabled in

* the configuration; default behaviour is to accept. */

if (r->used_path_info == AP_REQ_REJECT_PATH_INFO

&& r->path_info && r->path_info[0]) {

PHPAP_INI_OFF;

return HTTP_NOT_FOUND;

}

/* handle situations where user turns the engine off */

if (!AP2(engine)) {

PHPAP_INI_OFF;

return DECLINED;

}

if (r->finfo.filetype == 0) {

php_apache_sapi_log_message_ex("script '%s' not found or unable to stat", r);

PHPAP_INI_OFF;

return HTTP_NOT_FOUND;

}

if (r->finfo.filetype == APR_DIR) {

php_apache_sapi_log_message_ex("attempt to invoke directory '%s' as script", r);

PHPAP_INI_OFF;

return HTTP_FORBIDDEN;

}

/* Setup the CGI variables if this is the main request */

if (r->main == NULL ||

/* .. or if the sub-request environment differs from the main-request. */

r->subprocess_env != r->main->subprocess_env

) {

/* setup standard CGI variables */

ap_add_common_vars(r);

ap_add_cgi_vars(r);

}

zend_first_try {

if (ctx == NULL) {

brigade = apr_brigade_create(r->pool, r->connection->bucket_alloc);

ctx = SG(server_context);

ctx->brigade = brigade;

if (php_apache_request_ctor(r, ctx)!=SUCCESS) {

zend_bailout();

}

} else {

if (!parent_req) {

parent_req = ctx->r;

}

if (parent_req && parent_req->handler &&

strcmp(parent_req->handler, PHP_MAGIC_TYPE) &&

strcmp(parent_req->handler, PHP_SOURCE_MAGIC_TYPE) &&

strcmp(parent_req->handler, PHP_SCRIPT)) {

if (php_apache_request_ctor(r, ctx)!=SUCCESS) {

zend_bailout();

}

* check if coming due to ErrorDocument

* We make a special exception of 413 (Invalid POST request) as the invalidity of the request occurs

* during processing of the request by PHP during POST processing. Therefore we need to re-use the exiting

* PHP instance to handle the request rather then creating a new one.

if (parent_req && parent_req->status != HTTP_OK && parent_req->status != 413 && strcmp(r->protocol, "INCLUDED")) {

parent_req = NULL;

goto normal;

}

ctx->r = r;

brigade = ctx->brigade;

}

if (AP2(last_modified)) {

ap_update_mtime(r, r->finfo.mtime);

ap_set_last_modified(r);

}

/* Determine if we need to parse the file or show the source */

if (strncmp(r->handler, PHP_SOURCE_MAGIC_TYPE, sizeof(PHP_SOURCE_MAGIC_TYPE) - 1) == 0) {

zend_syntax_highlighter_ini syntax_highlighter_ini;

php_get_highlight_struct(&syntax_highlighter_ini);

highlight_file((char *)r->filename, &syntax_highlighter_ini);

} else {

zend_file_handle zfd;

zend_stream_init_filename(&zfd, (char *) r->filename);

zfd.primary_script = 1;

if (!parent_req) {

php_execute_script(&zfd);

} else {

zend_execute_scripts(ZEND_INCLUDE, NULL, 1, &zfd);

}

zend_destroy_file_handle(&zfd);

apr_table_set(r->notes, "mod_php_memory_usage",

apr_psprintf(ctx->r->pool, "%" APR_SIZE_T_FMT, zend_memory_peak_usage(1)));

}

} zend_end_try();

if (!parent_req) {

php_apache_request_dtor(r);

ctx->request_processed = 1;

apr_brigade_cleanup(brigade);

bucket = apr_bucket_eos_create(r->connection->bucket_alloc);

APR_BRIGADE_INSERT_TAIL(brigade, bucket);

rv = ap_pass_brigade(r->output_filters, brigade);

if (rv != APR_SUCCESS || r->connection->aborted) {

zend_first_try {

php_handle_aborted_connection();

} zend_end_try();

}

apr_brigade_cleanup(brigade);

apr_pool_cleanup_run(r->pool, (void *)&SG(server_context), php_server_context_cleanup);

} else {

ctx->r = parent_req;

}

return OK;

}

static void php_apache_child_init(apr_pool_t *pchild, server_rec *s)

{

apr_pool_cleanup_register(pchild, NULL, php_apache_child_shutdown, apr_pool_cleanup_null);

php_child_init();

}

#ifdef ZEND_SIGNALS

static void php_apache_signal_init(apr_pool_t *pchild, server_rec *s)

{

zend_signal_init();

}

#endif

void php_ap2_register_hook(apr_pool_t *p)

{

ap_hook_pre_config(php_pre_config, NULL, NULL, APR_HOOK_MIDDLE);

ap_hook_post_config(php_apache_server_startup, NULL, NULL, APR_HOOK_MIDDLE);

ap_hook_handler(php_handler, NULL, NULL, APR_HOOK_MIDDLE);

#ifdef ZEND_SIGNALS

ap_hook_child_init(php_apache_signal_init, NULL, NULL, APR_HOOK_MIDDLE);

#endif

ap_hook_child_init(php_apache_child_init, NULL, NULL, APR_HOOK_MIDDLE);

}

php-src/sapi/apache2handler/sapi_apache2.c at master · arshidkv12/php-src · GitHub

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