/* -*- Mode: C; tab-width: 4 -*- */

/*

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

| PHP Version 5 |

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

| Copyright (c) 1997-2009 The PHP Group |

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

| This source file is subject to version 3.01 of the PHP license, |

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

| available through the world-wide-web at the following url: |

| http://www.php.net/license/3_01.txt |

| If you did not receive a copy of the PHP license and are unable to |

| obtain it through the world-wide-web, please send a note to |

| license@php.net so we can mail you a copy immediately. |

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

| Original author: Alfonso Jimenez <yo@alfonsojimenez.com> |

| Maintainer: Nicolas Favre-Felix <n.favre-felix@owlient.eu> |

| Maintainer: Nasreddine Bouafif <n.bouafif@owlient.eu> |

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

*/

#ifdef HAVE_CONFIG_H

#include "config.h"

#endif

#ifdef PHP_SESSION

#include "common.h"

#include "ext/standard/info.h"

#include "php_redis.h"

#include "redis_session.h"

#include <zend_exceptions.h>

#include "library.h"

#include "php.h"

#include "php_ini.h"

#include "php_variables.h"

#include "SAPI.h"

#include "ext/standard/url.h"

ps_module ps_mod_redis = {

PS_MOD(redis)

};

typedef struct redis_pool_member_ {

RedisSock *redis_sock;

int weight;

char *prefix;

size_t prefix_len;

char *auth;

size_t auth_len;

struct redis_pool_member_ *next;

} redis_pool_member;

typedef struct {

int totalWeight;

int count;

redis_pool_member *head;

} redis_pool;

PHPAPI redis_pool*

redis_pool_new(TSRMLS_D) {

return ecalloc(1, sizeof(redis_pool));

}

PHPAPI void

redis_pool_add(redis_pool *pool, RedisSock *redis_sock, int weight,

char *prefix, char *auth TSRMLS_DC) {

redis_pool_member *rpm = ecalloc(1, sizeof(redis_pool_member));

rpm->redis_sock = redis_sock;

rpm->weight = weight;

rpm->prefix = prefix;

rpm->prefix_len = (prefix?strlen(prefix):0);

rpm->auth = auth;

rpm->auth_len = (auth?strlen(auth):0);

rpm->next = pool->head;

pool->head = rpm;

pool->totalWeight += weight;

}

PHPAPI void

redis_pool_free(redis_pool *pool TSRMLS_DC) {

redis_pool_member *rpm, *next;

rpm = pool->head;

while(rpm) {

next = rpm->next;

redis_sock_disconnect(rpm->redis_sock TSRMLS_CC);

efree(rpm->redis_sock);

if(rpm->prefix) efree(rpm->prefix);

if(rpm->auth) efree(rpm->auth);

efree(rpm);

rpm = next;

}

efree(pool);

}

void

redis_pool_member_auth(redis_pool_member *rpm TSRMLS_DC) {

RedisSock *redis_sock = rpm->redis_sock;

char *response, *cmd;

int response_len, cmd_len;

if(!rpm->auth || !rpm->auth_len) { /* no password given. */

return;

}

cmd_len = redis_cmd_format_static(&cmd, "AUTH", "s", rpm->auth, rpm->auth_len);

if(redis_sock_write(redis_sock, cmd, cmd_len TSRMLS_CC) >= 0) {

if ((response = redis_sock_read(redis_sock, &response_len TSRMLS_CC))) {

efree(response);

}

}

efree(cmd);

}

PHPAPI redis_pool_member *

redis_pool_get_sock(redis_pool *pool, const char *key TSRMLS_DC) {

unsigned int pos, i;

memcpy(&pos, key, sizeof(pos));

pos %= pool->totalWeight;

redis_pool_member *rpm = pool->head;

for(i = 0; i < pool->totalWeight;) {

if(pos >= i && pos < i + rpm->weight) {

int needs_auth = 0;

if(rpm->auth && rpm->auth_len && rpm->redis_sock->status != REDIS_SOCK_STATUS_CONNECTED) {

needs_auth = 1;

}

redis_sock_server_open(rpm->redis_sock, 0 TSRMLS_CC);

if(needs_auth) {

redis_pool_member_auth(rpm TSRMLS_CC);

}

return rpm;

}

i += rpm->weight;

rpm = rpm->next;

}

return NULL;

}

/* {{{ PS_OPEN_FUNC

*/

PS_OPEN_FUNC(redis)

{

php_url *url;

zval *params, **param;

int i, j, path_len;

redis_pool *pool = redis_pool_new(TSRMLS_C);

for (i=0,j=0,path_len=strlen(save_path); i<path_len; i=j+1) {

/* find beginning of url */

while (i<path_len && (isspace(save_path[i]) || save_path[i] == ','))

i++;

/* find end of url */

j = i;

while (j<path_len && !isspace(save_path[j]) && save_path[j] != ',')

j++;

if (i < j) {

int weight = 1;

double timeout = 86400.0;

int persistent = 0;

char *prefix = NULL, *auth = NULL, *persistent_id = NULL;

/* translate unix: into file: */

if (!strncmp(save_path+i, "unix:", sizeof("unix:")-1)) {

int len = j-i;

char *path = estrndup(save_path+i, len);

memcpy(path, "file:", sizeof("file:")-1);

url = php_url_parse_ex(path, len);

efree(path);

} else {

url = php_url_parse_ex(save_path+i, j-i);

}

if (!url) {

char *path = estrndup(save_path+i, j-i);

php_error_docref(NULL TSRMLS_CC, E_WARNING,

"Failed to parse session.save_path (error at offset %d, url was '%s')", i, path);

efree(path);

redis_pool_free(pool TSRMLS_CC);

PS_SET_MOD_DATA(NULL);

return FAILURE;

}

/* parse parameters */

if (url->query != NULL) {

MAKE_STD_ZVAL(params);

array_init(params);

sapi_module.treat_data(PARSE_STRING, estrdup(url->query), params TSRMLS_CC);

if (zend_hash_find(Z_ARRVAL_P(params), "weight", sizeof("weight"), (void **) &param) != FAILURE) {

convert_to_long_ex(param);

weight = Z_LVAL_PP(param);

}

if (zend_hash_find(Z_ARRVAL_P(params), "timeout", sizeof("timeout"), (void **) &param) != FAILURE) {

timeout = atof(Z_STRVAL_PP(param));

}

if (zend_hash_find(Z_ARRVAL_P(params), "persistent", sizeof("persistent"), (void **) &param) != FAILURE) {

persistent = (atol(Z_STRVAL_PP(param)) == 1 ? 1 : 0);

}

if (zend_hash_find(Z_ARRVAL_P(params), "persistent_id", sizeof("persistent_id"), (void **) &param) != FAILURE) {

persistent_id = estrndup(Z_STRVAL_PP(param), Z_STRLEN_PP(param));

}

if (zend_hash_find(Z_ARRVAL_P(params), "prefix", sizeof("prefix"), (void **) &param) != FAILURE) {

prefix = estrndup(Z_STRVAL_PP(param), Z_STRLEN_PP(param));

}

if (zend_hash_find(Z_ARRVAL_P(params), "auth", sizeof("auth"), (void **) &param) != FAILURE) {

auth = estrndup(Z_STRVAL_PP(param), Z_STRLEN_PP(param));

}

/* // not supported yet

if (zend_hash_find(Z_ARRVAL_P(params), "retry_interval", sizeof("retry_interval"), (void **) &param) != FAILURE) {

convert_to_long_ex(param);

retry_interval = Z_LVAL_PP(param);

}

*/

zval_ptr_dtor(&params);

}

if ((url->path == NULL && url->host == NULL) || weight <= 0 || timeout <= 0) {

php_url_free(url);

redis_pool_free(pool TSRMLS_CC);

PS_SET_MOD_DATA(NULL);

return FAILURE;

}

RedisSock *redis_sock;

if(url->path) { /* unix */

redis_sock = redis_sock_create(url->path, strlen(url->path), 0, timeout, persistent, persistent_id);

} else {

redis_sock = redis_sock_create(url->host, strlen(url->host), url->port, timeout, persistent, persistent_id);

}

redis_pool_add(pool, redis_sock, weight, prefix, auth TSRMLS_CC);

php_url_free(url);

}

}

if (pool->head) {

PS_SET_MOD_DATA(pool);

return SUCCESS;

}

return FAILURE;

}

/* }}} */

/* {{{ PS_CLOSE_FUNC

*/

PS_CLOSE_FUNC(redis)

{

redis_pool *pool = PS_GET_MOD_DATA();

if(pool){

redis_pool_free(pool TSRMLS_CC);

PS_SET_MOD_DATA(NULL);

}

return SUCCESS;

}

/* }}} */

static char *

redis_session_key(redis_pool_member *rpm, const char *key, int key_len, int *session_len) {

char *session;

char default_prefix[] = "PHPREDIS_SESSION:";

char *prefix = default_prefix;

size_t prefix_len = sizeof(default_prefix)-1;

if(rpm->prefix) {

prefix = rpm->prefix;

prefix_len = rpm->prefix_len;

}

/* build session key */

*session_len = key_len + prefix_len;

session = emalloc(*session_len);

memcpy(session, prefix, prefix_len);

memcpy(session + prefix_len, key, key_len);

return session;

}

/* {{{ PS_READ_FUNC

*/

PS_READ_FUNC(redis)

{

char *session, *cmd;

int session_len, cmd_len;

redis_pool *pool = PS_GET_MOD_DATA();

redis_pool_member *rpm = redis_pool_get_sock(pool, key TSRMLS_CC);

RedisSock *redis_sock = rpm?rpm->redis_sock:NULL;

if(!rpm || !redis_sock){

return FAILURE;

}

/* send GET command */

session = redis_session_key(rpm, key, strlen(key), &session_len);

cmd_len = redis_cmd_format_static(&cmd, "GET", "s", session, session_len);

efree(session);

if(redis_sock_write(redis_sock, cmd, cmd_len TSRMLS_CC) < 0) {

efree(cmd);

return FAILURE;

}

efree(cmd);

/* read response */

if ((*val = redis_sock_read(redis_sock, vallen TSRMLS_CC)) == NULL) {

return FAILURE;

}

return SUCCESS;

}

/* }}} */

/* {{{ PS_WRITE_FUNC

*/

PS_WRITE_FUNC(redis)

{

char *cmd, *response, *session;

int cmd_len, response_len, session_len;

redis_pool *pool = PS_GET_MOD_DATA();

redis_pool_member *rpm = redis_pool_get_sock(pool, key TSRMLS_CC);

RedisSock *redis_sock = rpm?rpm->redis_sock:NULL;

if(!rpm || !redis_sock){

return FAILURE;

}

/* send SET command */

session = redis_session_key(rpm, key, strlen(key), &session_len);

cmd_len = redis_cmd_format_static(&cmd, "SETEX", "sds", session, session_len, INI_INT("session.gc_maxlifetime"), val, vallen);

efree(session);

if(redis_sock_write(redis_sock, cmd, cmd_len TSRMLS_CC) < 0) {

efree(cmd);

return FAILURE;

}

efree(cmd);

/* read response */

if ((response = redis_sock_read(redis_sock, &response_len TSRMLS_CC)) == NULL) {

return FAILURE;

}

if(response_len == 3 && strncmp(response, "+OK", 3) == 0) {

efree(response);

return SUCCESS;

} else {

efree(response);

return FAILURE;

}

}

/* }}} */

/* {{{ PS_DESTROY_FUNC

*/

PS_DESTROY_FUNC(redis)

{

char *cmd, *response, *session;

int cmd_len, response_len, session_len;

redis_pool *pool = PS_GET_MOD_DATA();

redis_pool_member *rpm = redis_pool_get_sock(pool, key TSRMLS_CC);

RedisSock *redis_sock = rpm?rpm->redis_sock:NULL;

if(!rpm || !redis_sock){

return FAILURE;

}

/* send DEL command */

session = redis_session_key(rpm, key, strlen(key), &session_len);

cmd_len = redis_cmd_format_static(&cmd, "DEL", "s", session, session_len);

efree(session);

if(redis_sock_write(redis_sock, cmd, cmd_len TSRMLS_CC) < 0) {

efree(cmd);

return FAILURE;

}

efree(cmd);

/* read response */

if ((response = redis_sock_read(redis_sock, &response_len TSRMLS_CC)) == NULL) {

return FAILURE;

}

if(response_len == 2 && response[0] == ':' && (response[1] == '0' || response[1] == '1')) {

efree(response);

return SUCCESS;

} else {

efree(response);

return FAILURE;

}

}

/* }}} */

/* {{{ PS_GC_FUNC

*/

PS_GC_FUNC(redis)

{

return SUCCESS;

}

/* }}} */

#endif

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