/*
  +----------------------------------------------------------------------+
  | Swoole                                                               |
  +----------------------------------------------------------------------+
  | This source file is subject to version 2.0 of the Apache 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.apache.org/licenses/LICENSE-2.0.html                      |
  | If you did not receive a copy of the Apache2.0 license and are unable|
  | to obtain it through the world-wide-web, please send a note to       |
  | license@swoole.com so we can mail you a copy immediately.            |
  +----------------------------------------------------------------------+
  | Author: Fang  <coooold@live.com>                                     |
  | Author: Tianfeng Han  <mikan.tenny@gmail.com>                        |
  +----------------------------------------------------------------------+
*/

#include "php_swoole.h"
#include "websocket.h"
#include "thirdparty/php_http_parser.h"

#include "ext/standard/basic_functions.h"
#include "ext/standard/php_http.h"
#include "ext/standard/base64.h"

#ifdef SW_HAVE_ZLIB
#include <zlib.h>
#endif

enum http_client_state
{
    HTTP_CLIENT_STATE_WAIT,
    HTTP_CLIENT_STATE_READY,
    HTTP_CLIENT_STATE_BUSY,
    //WebSocket
    HTTP_CLIENT_STATE_UPGRADE,
    HTTP_CLIENT_STATE_WAIT_CLOSE,
};

typedef struct
{
    zval *onConnect;
    zval *onError;
    zval *onClose;
    zval *onMessage;
    zval *onResponse;

#if PHP_MAJOR_VERSION >= 7
    zval _object;
    zval _request_body;
    zval _request_header;
    zval _request_upload_files;
    zval _download_file;
    zval _cookies;
    zval _onConnect;
    zval _onError;
    zval _onClose;
    zval _onMessage;
#endif

    zval *cookies;
    zval *request_header;
    zval *request_body;
    zval *request_upload_files;
    zval *download_file;
    off_t download_offset;
    char *request_method;
    int callback_index;

} http_client_property;

typedef struct
{
    swClient *cli;
    char *host;
    zend_size_t host_len;
    long port;
    double timeout;
    char* uri;
    zend_size_t uri_len;

    char *tmp_header_field_name;
    zend_size_t tmp_header_field_name_len;

#ifdef SW_HAVE_ZLIB
    z_stream gzip_stream;
#endif

    /**
     * download page
     */
    int file_fd;

    php_http_parser parser;

    swString *body;

    uint8_t state;       //0 wait 1 ready 2 busy
    uint8_t keep_alive;  //0 no 1 keep
    uint8_t upgrade;
    uint8_t gzip;
    uint8_t chunked;     //Transfer-Encoding: chunked
    uint8_t completed;
    uint8_t websocket_mask;
    uint8_t download;    //save http response to file

} http_client;

#ifdef SW_HAVE_ZLIB
extern swString *swoole_zlib_buffer;
#endif

static swString *http_client_buffer;

static int http_client_parser_on_header_field(php_http_parser *parser, const char *at, size_t length);
static int http_client_parser_on_header_value(php_http_parser *parser, const char *at, size_t length);
static int http_client_parser_on_body(php_http_parser *parser, const char *at, size_t length);
static int http_client_parser_on_headers_complete(php_http_parser *parser);
static int http_client_parser_on_message_complete(php_http_parser *parser);

static void http_client_onReceive(swClient *cli, char *data, uint32_t length);
static void http_client_onConnect(swClient *cli);
static void http_client_onClose(swClient *cli);
static void http_client_onError(swClient *cli);
static int http_client_onMessage(swConnection *conn, char *data, uint32_t length);

static int http_client_send_http_request(zval *zobject TSRMLS_DC);
static http_client* http_client_create(zval *object TSRMLS_DC);
static void http_client_free(zval *object TSRMLS_DC);
static int http_client_execute(zval *zobject, char *uri, zend_size_t uri_len, zval *callback TSRMLS_DC);

#ifdef SW_HAVE_ZLIB
static int http_response_uncompress(z_stream *stream, char *body, int length);
static void http_init_gzip_stream(http_client *);
extern voidpf php_zlib_alloc(voidpf opaque, uInt items, uInt size);
extern void php_zlib_free(voidpf opaque, voidpf address);
#endif

static sw_inline void http_client_swString_append_headers(swString* swStr, char* key, zend_size_t key_len, char* data, zend_size_t data_len)
{
    swString_append_ptr(swStr, key, key_len);
    swString_append_ptr(swStr, ZEND_STRL(": "));
    swString_append_ptr(swStr, data, data_len);
    swString_append_ptr(swStr, ZEND_STRL("\r\n"));
}

static sw_inline void http_client_append_content_length(swString* buf, int length)
{
    char content_length_str[32];
    int n = snprintf(content_length_str, sizeof(content_length_str), "Content-Length: %d\r\n\r\n", length);
    swString_append_ptr(buf, content_length_str, n);
}

static sw_inline void http_client_create_token(int length, char *buf)
{
    char characters[] = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ!\"§$%&/()=[]{}";
    int i;
    assert(length < 1024);
    for (i = 0; i < length; i++)
    {
        buf[i] = characters[rand() % sizeof(characters) - 1];
    }
    buf[length] = '\0';
}

static const php_http_parser_settings http_parser_settings =
{
    NULL,
    NULL,
    NULL,
    NULL,
    NULL,
    http_client_parser_on_header_field,
    http_client_parser_on_header_value,
    http_client_parser_on_headers_complete,
    http_client_parser_on_body,
    http_client_parser_on_message_complete
};

static zend_class_entry swoole_http_client_ce;
static zend_class_entry *swoole_http_client_class_entry_ptr;

static PHP_METHOD(swoole_http_client, __construct);
static PHP_METHOD(swoole_http_client, __destruct);
static PHP_METHOD(swoole_http_client, set);
static PHP_METHOD(swoole_http_client, setMethod);
static PHP_METHOD(swoole_http_client, setHeaders);
static PHP_METHOD(swoole_http_client, setCookies);
static PHP_METHOD(swoole_http_client, setData);
static PHP_METHOD(swoole_http_client, addFile);
static PHP_METHOD(swoole_http_client, execute);
static PHP_METHOD(swoole_http_client, push);
static PHP_METHOD(swoole_http_client, isConnected);
static PHP_METHOD(swoole_http_client, close);
static PHP_METHOD(swoole_http_client, on);
static PHP_METHOD(swoole_http_client, get);
static PHP_METHOD(swoole_http_client, post);
static PHP_METHOD(swoole_http_client, upgrade);
static PHP_METHOD(swoole_http_client, download);

ZEND_BEGIN_ARG_INFO_EX(arginfo_swoole_void, 0, 0, 0)
ZEND_END_ARG_INFO()

ZEND_BEGIN_ARG_INFO_EX(arginfo_swoole_http_client_construct, 0, 0, 1)
    ZEND_ARG_INFO(0, host)
    ZEND_ARG_INFO(0, port)
    ZEND_ARG_INFO(0, ssl)
ZEND_END_ARG_INFO()

ZEND_BEGIN_ARG_INFO_EX(arginfo_swoole_http_client_set, 0, 0, 1)
    ZEND_ARG_ARRAY_INFO(0, settings, 0)
ZEND_END_ARG_INFO()

ZEND_BEGIN_ARG_INFO_EX(arginfo_swoole_http_client_setMethod, 0, 0, 1)
    ZEND_ARG_INFO(0, method)
ZEND_END_ARG_INFO()

ZEND_BEGIN_ARG_INFO_EX(arginfo_swoole_http_client_setHeaders, 0, 0, 1)
    ZEND_ARG_ARRAY_INFO(0, headers, 0)
ZEND_END_ARG_INFO()

ZEND_BEGIN_ARG_INFO_EX(arginfo_swoole_http_client_setCookies, 0, 0, 1)
    ZEND_ARG_ARRAY_INFO(0, cookies, 0)
ZEND_END_ARG_INFO()

ZEND_BEGIN_ARG_INFO_EX(arginfo_swoole_http_client_setData, 0, 0, 1)
    ZEND_ARG_INFO(0, data)
ZEND_END_ARG_INFO()

ZEND_BEGIN_ARG_INFO_EX(arginfo_swoole_http_client_addFile, 0, 0, 2)
    ZEND_ARG_INFO(0, path)
    ZEND_ARG_INFO(0, name)
    ZEND_ARG_INFO(0, type)
    ZEND_ARG_INFO(0, filename)
    ZEND_ARG_INFO(0, offset)
ZEND_END_ARG_INFO()

ZEND_BEGIN_ARG_INFO_EX(arginfo_swoole_http_client_execute, 0, 0, 2)
    ZEND_ARG_INFO(0, path)
    ZEND_ARG_INFO(0, callback)
ZEND_END_ARG_INFO()

ZEND_BEGIN_ARG_INFO_EX(arginfo_swoole_http_client_get, 0, 0, 2)
    ZEND_ARG_INFO(0, path)
    ZEND_ARG_INFO(0, callback)
ZEND_END_ARG_INFO()

ZEND_BEGIN_ARG_INFO_EX(arginfo_swoole_http_client_post, 0, 0, 3)
    ZEND_ARG_INFO(0, path)
    ZEND_ARG_INFO(0, data)
    ZEND_ARG_INFO(0, callback)
ZEND_END_ARG_INFO()

ZEND_BEGIN_ARG_INFO_EX(arginfo_swoole_http_client_download, 0, 0, 3)
    ZEND_ARG_INFO(0, path)
    ZEND_ARG_INFO(0, file)
    ZEND_ARG_INFO(0, callback)
    ZEND_ARG_INFO(0, offset)
ZEND_END_ARG_INFO()

ZEND_BEGIN_ARG_INFO_EX(arginfo_swoole_http_client_upgrade, 0, 0, 2)
    ZEND_ARG_INFO(0, path)
    ZEND_ARG_INFO(0, callback)
ZEND_END_ARG_INFO()

ZEND_BEGIN_ARG_INFO_EX(arginfo_swoole_http_client_push, 0, 0, 1)
    ZEND_ARG_INFO(0, data)
    ZEND_ARG_INFO(0, opcode)
    ZEND_ARG_INFO(0, finish)
ZEND_END_ARG_INFO()

ZEND_BEGIN_ARG_INFO_EX(arginfo_swoole_http_client_on, 0, 0, 2)
    ZEND_ARG_INFO(0, event_name)
    ZEND_ARG_INFO(0, callback)
ZEND_END_ARG_INFO()

static const zend_function_entry swoole_http_client_methods[] =
{
    PHP_ME(swoole_http_client, __construct, arginfo_swoole_http_client_construct, ZEND_ACC_PUBLIC | ZEND_ACC_CTOR)
    PHP_ME(swoole_http_client, __destruct, arginfo_swoole_void, ZEND_ACC_PUBLIC | ZEND_ACC_DTOR)
    PHP_ME(swoole_http_client, set, arginfo_swoole_http_client_set, ZEND_ACC_PUBLIC)
    PHP_ME(swoole_http_client, setMethod, arginfo_swoole_http_client_setMethod, ZEND_ACC_PUBLIC)
    PHP_ME(swoole_http_client, setHeaders, arginfo_swoole_http_client_setHeaders, ZEND_ACC_PUBLIC)
    PHP_ME(swoole_http_client, setCookies, arginfo_swoole_http_client_setCookies, ZEND_ACC_PUBLIC)
    PHP_ME(swoole_http_client, setData, arginfo_swoole_http_client_setData, ZEND_ACC_PUBLIC)
    PHP_ME(swoole_http_client, addFile, arginfo_swoole_http_client_addFile, ZEND_ACC_PUBLIC)
    PHP_ME(swoole_http_client, execute, arginfo_swoole_http_client_execute, ZEND_ACC_PUBLIC)
    PHP_ME(swoole_http_client, push, arginfo_swoole_http_client_push, ZEND_ACC_PUBLIC)
    PHP_ME(swoole_http_client, get, arginfo_swoole_http_client_get, ZEND_ACC_PUBLIC)
    PHP_ME(swoole_http_client, post, arginfo_swoole_http_client_post, ZEND_ACC_PUBLIC)
    PHP_ME(swoole_http_client, upgrade, arginfo_swoole_http_client_upgrade, ZEND_ACC_PUBLIC)
    PHP_ME(swoole_http_client, download, arginfo_swoole_http_client_download, ZEND_ACC_PUBLIC)
    PHP_ME(swoole_http_client, isConnected, arginfo_swoole_void, ZEND_ACC_PUBLIC)
    PHP_ME(swoole_http_client, close, arginfo_swoole_void, ZEND_ACC_PUBLIC)
    PHP_ME(swoole_http_client, on, arginfo_swoole_http_client_on, ZEND_ACC_PUBLIC)
    PHP_FE_END
};

static int http_client_execute(zval *zobject, char *uri, zend_size_t uri_len, zval *callback TSRMLS_DC)
{
    if (uri_len <= 0)
    {
        swoole_php_fatal_error(E_WARNING, "path is empty.");
        return SW_ERR;
    }

    char *func_name = NULL;
    if (!sw_zend_is_callable(callback, 0, &func_name TSRMLS_CC))
    {
        swoole_php_fatal_error(E_WARNING, "Function '%s' is not callable", func_name);
        efree(func_name);
        return SW_ERR;
    }
    efree(func_name);

    http_client *http = swoole_get_object(zobject);

    //http is not null when keeping alive
    if (http)
    {
        //http not ready
        if (http->state != HTTP_CLIENT_STATE_READY)
        {
            //swWarn("fd=%d, state=%d, active=%d, keep_alive=%d", http->cli->socket->fd, http->state, http->cli->socket->active, http->keep_alive);
            swoole_php_fatal_error(E_WARNING, "Operation now in progress phase %d.", http->state);
            return SW_ERR;
        }
        else if (!http->cli->socket->active)
        {
            swoole_php_fatal_error(E_WARNING, "connection#%d is closed.", http->cli->socket->fd);
            return SW_ERR;
        }
    }
    else
    {
        php_swoole_check_reactor();
        http = http_client_create(zobject TSRMLS_CC);
    }

    if (http == NULL)
    {
        return SW_ERR;
    }

    if (http->body == NULL)
    {
        http->body = swString_new(SW_HTTP_RESPONSE_INIT_SIZE);
        if (http->body == NULL)
        {
            swoole_php_fatal_error(E_ERROR, "[1] swString_new(%d) failed.", SW_HTTP_RESPONSE_INIT_SIZE);
            return SW_ERR;
        }
    }
    else
    {
        swString_clear(http->body);
    }

    if (http->uri)
    {
        efree(http->uri);
    }

    http->uri = estrdup(uri);
    http->uri_len = uri_len;

    if (callback == NULL || ZVAL_IS_NULL(callback))
    {
        swoole_php_fatal_error(E_WARNING, "response callback is not set.");
    }

    http_client_property *hcc = swoole_get_property(zobject, 0);
    sw_zval_add_ref(&callback);
    hcc->onResponse = sw_zval_dup(callback);

    /**
     * download response body
     */
    if (hcc->download_file)
    {
        int fd = open(Z_STRVAL_P(hcc->download_file), O_CREAT | O_WRONLY, 0664);
        if (fd < 0)
        {
            swSysError("open(%s, O_CREAT | O_WRONLY) failed.", Z_STRVAL_P(hcc->download_file));
            return SW_ERR;
        }
        if (hcc->download_offset == 0)
        {
            if (ftruncate(fd, 0) < 0)
            {
                swSysError("ftruncate(%s) failed.", Z_STRVAL_P(hcc->download_file));
                close(fd);
                return SW_ERR;
            }
        }
        else
        {
            if (lseek(fd, hcc->download_offset, SEEK_SET) < 0)
            {
                swSysError("fseek(%s, %ld) failed.", Z_STRVAL_P(hcc->download_file), hcc->download_offset);
                close(fd);
                return SW_ERR;
            }
        }
        http->download = 1;
        http->file_fd = fd;
    }

    //if connection exists
    if (http->cli)
    {
        http_client_send_http_request(zobject TSRMLS_CC);
        return SW_OK;
    }

    swClient *cli = php_swoole_client_new(zobject, http->host, http->host_len, http->port);
    if (cli == NULL)
    {
        return SW_ERR;
    }
    http->cli = cli;

    zval *ztmp;
    HashTable *vht;
    zval *zset = sw_zend_read_property(swoole_http_client_class_entry_ptr, zobject, ZEND_STRL("setting"), 1 TSRMLS_CC);
    if (zset && !ZVAL_IS_NULL(zset))
    {
        vht = Z_ARRVAL_P(zset);
        /**
         * timeout
         */
        if (php_swoole_array_get_value(vht, "timeout", ztmp))
        {
            convert_to_double(ztmp);
            http->timeout = (double) Z_DVAL_P(ztmp);
        }
        /**
         * keep_alive
         */
        if (php_swoole_array_get_value(vht, "keep_alive", ztmp))
        {
            convert_to_boolean(ztmp);
            http->keep_alive = (int) Z_LVAL_P(ztmp);
        }
        /**
         * websocket mask
         */
        if (php_swoole_array_get_value(vht, "websocket_mask", ztmp))
        {
            convert_to_boolean(ztmp);
            http->websocket_mask = (int) Z_BVAL_P(ztmp);
        }
        //client settings
        php_swoole_client_check_setting(http->cli, zset TSRMLS_CC);
    }

    if (cli->socket->active == 1)
    {
        swoole_php_fatal_error(E_WARNING, "swoole_http_client is already connected.");
        return SW_ERR;
    }

    cli->object = zobject;
    sw_copy_to_stack(cli->object, hcc->_object);
    sw_zval_add_ref(&zobject);

    cli->open_eof_check = 0;
    cli->open_length_check = 0;
    cli->reactor_fdtype = PHP_SWOOLE_FD_STREAM_CLIENT;
    cli->onReceive = http_client_onReceive;
    cli->onConnect = http_client_onConnect;
    cli->onClose = http_client_onClose;
    cli->onError = http_client_onError;

    return cli->connect(cli, http->host, http->port, http->timeout, 0);
}

void swoole_http_client_init(int module_number TSRMLS_DC)
{
    SWOOLE_INIT_CLASS_ENTRY(swoole_http_client_ce, "swoole_http_client", "Swoole\\Http\\Client", swoole_http_client_methods);
    swoole_http_client_class_entry_ptr = zend_register_internal_class(&swoole_http_client_ce TSRMLS_CC);
    SWOOLE_CLASS_ALIAS(swoole_http_client, "Swoole\\Http\\Client");

    zend_declare_property_long(swoole_http_client_class_entry_ptr, SW_STRL("errCode")-1, 0, ZEND_ACC_PUBLIC TSRMLS_CC);
    zend_declare_property_long(swoole_http_client_class_entry_ptr, SW_STRL("sock")-1, 0, ZEND_ACC_PUBLIC TSRMLS_CC);

    http_client_buffer = swString_new(SW_HTTP_RESPONSE_INIT_SIZE);
    if (!http_client_buffer)
    {
        swoole_php_fatal_error(E_ERROR, "[1] swString_new(%d) failed.", SW_HTTP_RESPONSE_INIT_SIZE);
    }

#ifdef SW_HAVE_ZLIB
    swoole_zlib_buffer = swString_new(2048);
    if (!swoole_zlib_buffer)
    {
        swoole_php_fatal_error(E_ERROR, "[2] swString_new(%d) failed.", SW_HTTP_RESPONSE_INIT_SIZE);
    }
#endif
}

static sw_inline void http_client_execute_callback(zval *zobject, enum php_swoole_client_callback_type type)
{
#if PHP_MAJOR_VERSION < 7
    TSRMLS_FETCH_FROM_CTX(sw_thread_ctx ? sw_thread_ctx : NULL);
#endif

    zval *callback = NULL;
    zval *retval = NULL;
    zval **args[1];

    http_client_property *hcc = swoole_get_property(zobject, 0);
    if (!hcc)
    {
        return;
    }

    char *callback_name;
    switch(type)
    {
    case SW_CLIENT_CB_onConnect:
        callback = hcc->onConnect;
        callback_name = "onConnect";
        break;
    case SW_CLIENT_CB_onError:
        callback = hcc->onError;
        callback_name = "onError";
        break;
    case SW_CLIENT_CB_onClose:
        callback = hcc->onClose;
        callback_name = "onClose";
        break;
    default:
        return;
    }

    if (!callback || ZVAL_IS_NULL(callback))
    {
        return;
    }

    args[0] = &zobject;
    if (sw_call_user_function_ex(EG(function_table), NULL, callback, &retval, 1, args, 0, NULL TSRMLS_CC) == FAILURE)
    {
        swoole_php_fatal_error(E_WARNING, "swoole_http_client->%s handler error.", callback_name);
    }
    if (EG(exception))
    {
        zend_exception_error(EG(exception), E_ERROR TSRMLS_CC);
    }
    //free the callback return value
    if (retval != NULL)
    {
        sw_zval_ptr_dtor(&retval);
    }
}

/**
 * @zobject: swoole_http_client object
 */
static void http_client_onClose(swClient *cli)
{
#if PHP_MAJOR_VERSION < 7
    TSRMLS_FETCH_FROM_CTX(sw_thread_ctx ? sw_thread_ctx : NULL);
#endif
    zval *zobject = cli->object;
    http_client *http = swoole_get_object(zobject);
    if (http && http->state == HTTP_CLIENT_STATE_WAIT_CLOSE)
    {
        http_client_parser_on_message_complete(&http->parser);
    }
    if (!cli->released)
    {
        http_client_free(zobject TSRMLS_CC);
    }
    http_client_execute_callback(zobject, SW_CLIENT_CB_onClose);
    sw_zval_ptr_dtor(&zobject);
}

static int http_client_onMessage(swConnection *conn, char *data, uint32_t length)
{
#if PHP_MAJOR_VERSION < 7
    TSRMLS_FETCH_FROM_CTX(sw_thread_ctx ? sw_thread_ctx : NULL);
#endif

    swClient *cli = conn->object;
    zval *zobject = cli->object;
    zval **args[2];
    zval *retval;

    zval *zframe = php_swoole_websocket_unpack(cli->buffer TSRMLS_CC);

    args[0] = &zobject;
    args[1] = &zframe;

    http_client_property *hcc = swoole_get_property(zobject, 0);
    zval *zcallback = hcc->onMessage;
    if (sw_call_user_function_ex(EG(function_table), NULL, zcallback, &retval, 2, args, 0, NULL TSRMLS_CC)  == FAILURE)
    {
        swoole_php_fatal_error(E_ERROR, "swoole_http_client->onMessage: onClose handler error");
    }
    if (EG(exception))
    {
        zend_exception_error(EG(exception), E_ERROR TSRMLS_CC);
    }
    //free the callback return value
    if (retval != NULL)
    {
        sw_zval_ptr_dtor(&retval);
    }
    sw_zval_ptr_dtor(&zframe);

    return SW_OK;
}

/**
 * @zobject: swoole_http_client object
 */
static void http_client_onError(swClient *cli)
{
#if PHP_MAJOR_VERSION < 7
    TSRMLS_FETCH_FROM_CTX(sw_thread_ctx ? sw_thread_ctx : NULL);
#endif
    zval *zobject = cli->object;
    zend_update_property_long(swoole_http_client_class_entry_ptr, zobject, ZEND_STRL("errCode"), SwooleG.error TSRMLS_CC);
    if (!cli->released)
    {
        http_client_free(zobject TSRMLS_CC);
    }
    http_client_execute_callback(zobject, SW_CLIENT_CB_onError);
    sw_zval_ptr_dtor(&zobject);
}

static void http_client_onReceive(swClient *cli, char *data, uint32_t length)
{
#if PHP_MAJOR_VERSION < 7
    TSRMLS_FETCH_FROM_CTX(sw_thread_ctx ? sw_thread_ctx : NULL);
#endif

    zval *zobject = cli->object;
    http_client *http = swoole_get_object(zobject);
    if (!http->cli)
    {
        swoole_php_fatal_error(E_WARNING, "object is not instanceof swoole_http_client.");
        return;
    }

    long parsed_n = php_http_parser_execute(&http->parser, &http_parser_settings, data, length);
    if (parsed_n < 0)
    {
        swSysError("Parsing http over socket[%d] failed.", cli->socket->fd);
        cli->close(cli);
    }
    //not complete
    if (!http->completed)
    {
        return;
    }

    swConnection *conn = cli->socket;
    zval *retval = NULL;
    http_client_property *hcc = swoole_get_property(zobject, 0);
    zval *zcallback = hcc->onResponse;

    zval **args[1];
    args[0] = &zobject;

    if (zcallback == NULL || ZVAL_IS_NULL(zcallback))
    {
        swoole_php_fatal_error(E_WARNING, "swoole_http_client object have not receive callback.");
        return;
    }
    /**
     * TODO: Sec-WebSocket-Accept check
     */
    if (http->upgrade)
    {
        cli->open_length_check = 1;
        swString_clear(cli->buffer);
        cli->protocol.get_package_length = swWebSocket_get_package_length;
        cli->protocol.onPackage = http_client_onMessage;
        cli->protocol.package_length_size = SW_WEBSOCKET_HEADER_LEN + SW_WEBSOCKET_MASK_LEN + sizeof(uint64_t);
        http->state = HTTP_CLIENT_STATE_UPGRADE;
    }
    else if (http->keep_alive == 1)
    {
        http->state = HTTP_CLIENT_STATE_READY;
        http->completed = 0;
    }
    if (http->download)
    {
        close(http->file_fd);
        http->download = 0;
        http->file_fd = 0;
    }
#ifdef SW_HAVE_ZLIB
    if (http->gzip)
    {
        inflateEnd(&http->gzip_stream);
        http->gzip = 0;
    }
#endif
    if (sw_call_user_function_ex(EG(function_table), NULL, zcallback, &retval, 1, args, 0, NULL TSRMLS_CC) == FAILURE)
    {
        swoole_php_fatal_error(E_WARNING, "onReactorCallback handler error");
    }
    if (EG(exception))
    {
        zend_exception_error(EG(exception), E_ERROR TSRMLS_CC);
    }
    if (retval)
    {
        sw_zval_ptr_dtor(&retval);
    }
    sw_zval_free(zcallback);
    if (conn->active == 0)
    {
        return;
    }
    if (http->keep_alive == 0 && http->state != HTTP_CLIENT_STATE_WAIT_CLOSE)
    {
        sw_zend_call_method_with_0_params(&zobject, swoole_http_client_class_entry_ptr, NULL, "close", &retval);
        if (retval)
        {
            sw_zval_ptr_dtor(&retval);
        }
    }
}

static void http_client_onConnect(swClient *cli)
{
#if PHP_MAJOR_VERSION < 7
    TSRMLS_FETCH_FROM_CTX(sw_thread_ctx ? sw_thread_ctx : NULL);
#endif

    zval *zobject = cli->object;
    http_client *http = swoole_get_object(zobject);
    if (!http->cli)
    {
        swoole_php_fatal_error(E_WARNING, "object is not instanceof swoole_http_client.");
        return;
    }
    http_client_execute_callback(zobject, SW_CLIENT_CB_onConnect);
    //send http request on write
    http_client_send_http_request(zobject TSRMLS_CC);
}

#if PHP_MAJOR_VERSION < 7
static inline char* sw_http_build_query(zval *data, zend_size_t *length, smart_str *formstr TSRMLS_DC)
{
#if PHP_MAJOR_VERSION == 5 && PHP_MINOR_VERSION == 3
    if (php_url_encode_hash_ex(HASH_OF(data), formstr, NULL, 0, NULL, 0, NULL, 0, NULL, NULL TSRMLS_CC) == FAILURE)
#else
    if (php_url_encode_hash_ex(HASH_OF(data), formstr, NULL, 0, NULL, 0, NULL, 0, NULL, NULL, (int) PHP_QUERY_RFC1738 TSRMLS_CC) == FAILURE)
#endif
    {
        if (formstr->c)
        {
            smart_str_free(formstr);
        }
        return NULL;
    }
    if (!formstr->c)
    {
        return NULL;
    }
    smart_str_0(formstr);
    *length = formstr->len;
    return formstr->c;
}
#else
static inline char* sw_http_build_query(zval *data, zend_size_t *length, smart_str *formstr TSRMLS_DC)
{
    if (php_url_encode_hash_ex(HASH_OF(data), formstr, NULL, 0, NULL, 0, NULL, 0, NULL, NULL, (int) PHP_QUERY_RFC1738) == FAILURE)
    {
        if (formstr->s)
        {
            smart_str_free(formstr);
        }
        return NULL;
    }
    if (!formstr->s)
    {
        return NULL;
    }
    smart_str_0(formstr);
    *length = formstr->s->len;
    return formstr->s->val;
}
#endif

static int http_client_send_http_request(zval *zobject TSRMLS_DC)
{
    int ret;
    http_client *http = swoole_get_object(zobject);
    if (!http->cli)
    {
        swoole_php_fatal_error(E_WARNING, "object is not instanceof swoole_http_client.");
        return SW_ERR;
    }

    if (!http->cli->socket && http->cli->socket->active == 0)
    {
        swoole_php_error(E_WARNING, "server is not connected.");
        return SW_ERR;
    }

    if (http->state != HTTP_CLIENT_STATE_READY)
    {
        swoole_php_error(E_WARNING, "http client is not ready.");
        return SW_ERR;
    }

    http->state = HTTP_CLIENT_STATE_BUSY;
     //clear errno
    SwooleG.error = 0;

    http_client_property *hcc = swoole_get_property(zobject, 0);

    zval *post_data = hcc->request_body;
    zval *send_header = hcc->request_header;

    //POST
    if (post_data)
    {
        if (hcc->request_method == NULL)
        {
            hcc->request_method = "POST";
        }
    }
    //GET
    else
    {
        if (hcc->request_method == NULL)
        {
            hcc->request_method = "GET";
        }
    }

    swString_clear(http_client_buffer);
    swString_append_ptr(http_client_buffer, hcc->request_method, strlen(hcc->request_method));
    hcc->request_method = NULL;
    swString_append_ptr(http_client_buffer, ZEND_STRL(" "));
    swString_append_ptr(http_client_buffer, http->uri, http->uri_len);
    swString_append_ptr(http_client_buffer, ZEND_STRL(" HTTP/1.1\r\n"));

    char *key;
    uint32_t keylen;
    int keytype;
    zval *value;

    if (send_header && Z_TYPE_P(send_header) == IS_ARRAY)
    {
        if (sw_zend_hash_find(Z_ARRVAL_P(send_header), ZEND_STRS("Connection"), (void **) &value) == FAILURE)
        {
            if (http->keep_alive)
            {
                http_client_swString_append_headers(http_client_buffer, ZEND_STRL("Connection"), ZEND_STRL("keep-alive"));
            }
            else
            {
                http_client_swString_append_headers(http_client_buffer, ZEND_STRL("Connection"), ZEND_STRL("closed"));
            }
        }

        if (sw_zend_hash_find(Z_ARRVAL_P(send_header), ZEND_STRS("Host"), (void **) &value) == FAILURE)
        {
            http_client_swString_append_headers(http_client_buffer, ZEND_STRL("Host"), http->host, http->host_len);
        }

#ifdef SW_HAVE_ZLIB
        if (sw_zend_hash_find(Z_ARRVAL_P(send_header), ZEND_STRS("Accept-Encoding"), (void **) &value) == FAILURE)
        {
            http_client_swString_append_headers(http_client_buffer, ZEND_STRL("Accept-Encoding"), ZEND_STRL("gzip"));
        }
#endif

        SW_HASHTABLE_FOREACH_START2(Z_ARRVAL_P(send_header), key, keylen, keytype, value)
            if (HASH_KEY_IS_STRING != keytype)
            {
                continue;
            }
            convert_to_string(value);
            http_client_swString_append_headers(http_client_buffer, key, keylen, Z_STRVAL_P(value), Z_STRLEN_P(value));
        SW_HASHTABLE_FOREACH_END();
    }
    else
    {
        http_client_swString_append_headers(http_client_buffer, ZEND_STRL("Connection"), ZEND_STRL("keep-alive"));
        http->keep_alive = 1;
        http_client_swString_append_headers(http_client_buffer, ZEND_STRL("Host"), http->host, http->host_len);
#ifdef SW_HAVE_ZLIB
        http_client_swString_append_headers(http_client_buffer, ZEND_STRL("Accept-Encoding"), ZEND_STRL("gzip"));
#endif
    }

    if (hcc->cookies && Z_TYPE_P(hcc->cookies) == IS_ARRAY)
    {
        swString_append_ptr(http_client_buffer, ZEND_STRL("Cookie: "));
        int n_cookie = Z_ARRVAL_P(hcc->cookies)->nNumOfElements;
        int i = 0;
        char *encoded_value;

        SW_HASHTABLE_FOREACH_START2(Z_ARRVAL_P(hcc->cookies), key, keylen, keytype, value)
            i ++;
            if (HASH_KEY_IS_STRING != keytype)
            {
                continue;
            }
            convert_to_string(value);
            swString_append_ptr(http_client_buffer, key, keylen);
            swString_append_ptr(http_client_buffer, "=", 1);

            int encoded_value_len;
            encoded_value = sw_php_url_encode( Z_STRVAL_P(value), Z_STRLEN_P(value), &encoded_value_len);
            if (encoded_value)
            {
                swString_append_ptr(http_client_buffer, encoded_value, encoded_value_len);
                efree(encoded_value);
            }
            if (i < n_cookie)
            {
                swString_append_ptr(http_client_buffer, "; ", 2);
            }
        SW_HASHTABLE_FOREACH_END();
        swString_append_ptr(http_client_buffer, ZEND_STRL("\r\n"));
    }

    //form-data
    if (hcc->request_upload_files)
    {
        char header_buf[2048];
        char boundary_str[39];
        int n;

        memcpy(boundary_str, SW_HTTP_CLIENT_BOUNDARY_PREKEY, sizeof(SW_HTTP_CLIENT_BOUNDARY_PREKEY) - 1);
        swoole_random_string(boundary_str + sizeof(SW_HTTP_CLIENT_BOUNDARY_PREKEY) - 1,
                sizeof(boundary_str) - sizeof(SW_HTTP_CLIENT_BOUNDARY_PREKEY));

        n = snprintf(header_buf, sizeof(header_buf), "Content-Type: multipart/form-data; boundary=%*s\r\n",
                sizeof(boundary_str) - 1, boundary_str);

        swString_append_ptr(http_client_buffer, header_buf, n);

        int content_length = 0;

        //post data
        if (Z_TYPE_P(post_data) == IS_ARRAY)
        {
            SW_HASHTABLE_FOREACH_START2(Z_ARRVAL_P(post_data), key, keylen, keytype, value)
                if (HASH_KEY_IS_STRING != keytype)
                {
                    continue;
                }
                convert_to_string(value);
                //strlen("%.*")*2 = 6
                //header + body + CRLF
                content_length += (sizeof(SW_HTTP_FORM_DATA_FORMAT_STRING) - 7) + (sizeof(boundary_str) - 1) + keylen
                        + Z_STRLEN_P(value) + 2;
            SW_HASHTABLE_FOREACH_END();
        }

        zval *zname;
        zval *ztype;
        zval *zsize;
        zval *zpath;
        zval *zfilename;
        zval *zoffset;

        if (hcc->request_upload_files)
        {
            //upload files
            SW_HASHTABLE_FOREACH_START2(Z_ARRVAL_P(hcc->request_upload_files), key, keylen, keytype, value)
                if (sw_zend_hash_find(Z_ARRVAL_P(value), ZEND_STRS("name"), (void **) &zname) == FAILURE)
                {
                    continue;
                }
                if (sw_zend_hash_find(Z_ARRVAL_P(value), ZEND_STRS("filename"), (void **) &zfilename) == FAILURE)
                {
                    continue;
                }
                if (sw_zend_hash_find(Z_ARRVAL_P(value), ZEND_STRS("size"), (void **) &zsize) == FAILURE)
                {
                    continue;
                }
                if (sw_zend_hash_find(Z_ARRVAL_P(value), ZEND_STRS("type"), (void **) &ztype) == FAILURE)
                {
                    continue;
                }
                //strlen("%.*")*4 = 12
                //header + body + CRLF
                content_length += (sizeof(SW_HTTP_FORM_DATA_FORMAT_FILE) - 13) + (sizeof(boundary_str) - 1)
                        + Z_STRLEN_P(zname) + Z_STRLEN_P(zfilename) + Z_STRLEN_P(ztype) + Z_LVAL_P(zsize) + 2;
            SW_HASHTABLE_FOREACH_END();
        }

        http_client_append_content_length(http_client_buffer, content_length + sizeof(boundary_str) - 1 + 6);

        //post data
        if (Z_TYPE_P(post_data) == IS_ARRAY)
        {
            SW_HASHTABLE_FOREACH_START2(Z_ARRVAL_P(post_data), key, keylen, keytype, value)
                if (HASH_KEY_IS_STRING != keytype)
                {
                    continue;
                }
                convert_to_string(value);
                n = snprintf(header_buf, sizeof(header_buf), SW_HTTP_FORM_DATA_FORMAT_STRING, sizeof(boundary_str) - 1,
                        boundary_str, keylen, key);
                swString_append_ptr(http_client_buffer, header_buf, n);
                swString_append_ptr(http_client_buffer, Z_STRVAL_P(value), Z_STRLEN_P(value));
                swString_append_ptr(http_client_buffer, ZEND_STRL("\r\n"));
            SW_HASHTABLE_FOREACH_END();

            zend_update_property_null(swoole_http_client_class_entry_ptr, zobject, ZEND_STRL("requestBody") TSRMLS_CC);
            hcc->request_body = NULL;
        }

        if ((ret = http->cli->send(http->cli, http_client_buffer->str, http_client_buffer->length, 0)) < 0)
        {
            goto send_fail;
        }

        if (hcc->request_upload_files)
        {
            //upload files
            SW_HASHTABLE_FOREACH_START2(Z_ARRVAL_P(hcc->request_upload_files), key, keylen, keytype, value)
                if (sw_zend_hash_find(Z_ARRVAL_P(value), ZEND_STRS("name"), (void **) &zname) == FAILURE)
                {
                    continue;
                }
                if (sw_zend_hash_find(Z_ARRVAL_P(value), ZEND_STRS("filename"), (void **) &zfilename) == FAILURE)
                {
                    continue;
                }
                if (sw_zend_hash_find(Z_ARRVAL_P(value), ZEND_STRS("path"), (void **) &zpath) == FAILURE)
                {
                    continue;
                }
                if (sw_zend_hash_find(Z_ARRVAL_P(value), ZEND_STRS("type"), (void **) &ztype) == FAILURE)
                {
                    continue;
                }
                if (sw_zend_hash_find(Z_ARRVAL_P(value), ZEND_STRS("offset"), (void **) &zoffset) == FAILURE)
                {
                    continue;
                }

                n = snprintf(header_buf, sizeof(header_buf), SW_HTTP_FORM_DATA_FORMAT_FILE, sizeof(boundary_str) - 1,
                        boundary_str, Z_STRLEN_P(zname), Z_STRVAL_P(zname), Z_STRLEN_P(zfilename),
                        Z_STRVAL_P(zfilename), Z_STRLEN_P(ztype), Z_STRVAL_P(ztype));

                if ((ret = http->cli->send(http->cli, header_buf, n, 0)) < 0)
                {
                    goto send_fail;
                }
                if ((ret = http->cli->sendfile(http->cli, Z_STRVAL_P(zpath), Z_LVAL_P(zoffset))) < 0)
                {
                    goto send_fail;
                }
                if ((ret = http->cli->send(http->cli, "\r\n", 2, 0)) < 0)
                {
                    goto send_fail;
                }
            SW_HASHTABLE_FOREACH_END();

            zend_update_property_null(swoole_http_client_class_entry_ptr, zobject, ZEND_STRL("uploadFiles") TSRMLS_CC);
            hcc->request_upload_files = NULL;
        }

        n = snprintf(header_buf, sizeof(header_buf), "--%*s--\r\n", sizeof(boundary_str) - 1, boundary_str);
        if ((ret = http->cli->send(http->cli, header_buf, n, 0)) < 0)
        {
            goto send_fail;
        }
        else
        {
            return SW_OK;
        }
    }
    //x-www-form-urlencoded or raw
    else if (post_data)
    {
        if (Z_TYPE_P(post_data) == IS_ARRAY)
        {
            zend_size_t len;
            http_client_swString_append_headers(http_client_buffer, ZEND_STRL("Content-Type"), ZEND_STRL("application/x-www-form-urlencoded"));
            smart_str formstr_s = { 0 };
            char *formstr = sw_http_build_query(post_data, &len, &formstr_s TSRMLS_CC);
            if (formstr == NULL)
            {
                swoole_php_error(E_WARNING, "http_build_query failed.");
                return SW_ERR;
            }
            http_client_append_content_length(http_client_buffer, len);
            swString_append_ptr(http_client_buffer, formstr, len);
            smart_str_free(&formstr_s);
        }
        else
        {
            http_client_append_content_length(http_client_buffer, Z_STRLEN_P(post_data));
            swString_append_ptr(http_client_buffer, Z_STRVAL_P(post_data), Z_STRLEN_P(post_data));
        }

        zend_update_property_null(swoole_http_client_class_entry_ptr, zobject, ZEND_STRL("requestBody") TSRMLS_CC);
        hcc->request_body = NULL;
    }
    else
    {
        swString_append_ptr(http_client_buffer, ZEND_STRL("\r\n"));
    }

    swTrace("[%d]: %s\n", (int)http_client_buffer->length, http_client_buffer->str);

    if ((ret = http->cli->send(http->cli, http_client_buffer->str, http_client_buffer->length, 0)) < 0)
    {
        send_fail:
        SwooleG.error = errno;
        swoole_php_sys_error(E_WARNING, "send(%d) %d bytes failed.", http->cli->socket->fd, (int )http_client_buffer->length);
        zend_update_property_long(swoole_http_client_class_entry_ptr, zobject, SW_STRL("errCode")-1, SwooleG.error TSRMLS_CC);
    }
    return ret;
}

static void http_client_free(zval *object TSRMLS_DC)
{
    http_client *http = swoole_get_object(object);
    if (!http)
    {
        return;
    }
    if (http->uri)
    {
        efree(http->uri);
    }
    if (http->body)
    {
        swString_free(http->body);
    }
#ifdef SW_HAVE_ZLIB
    if (http->gzip)
    {
        inflateEnd(&http->gzip_stream);
        http->gzip = 0;
    }
#endif
    swClient *cli = http->cli;
    if (cli)
    {
        php_swoole_client_free(object, cli TSRMLS_CC);
        http->cli = NULL;
    }
    efree(http);
}

static http_client* http_client_create(zval *object TSRMLS_DC)
{
    zval *ztmp;
    http_client *http;
    HashTable *vht;

    http = (http_client*) emalloc(sizeof(http_client));
    bzero(http, sizeof(http_client));

    swoole_set_object(object, http);

    php_http_parser_init(&http->parser, PHP_HTTP_RESPONSE);
    http->parser.data = http;

    ztmp = sw_zend_read_property(swoole_http_client_class_entry_ptr, object, ZEND_STRL("host"), 0 TSRMLS_CC);
    http->host = Z_STRVAL_P(ztmp);
    http->host_len = Z_STRLEN_P(ztmp);

    ztmp = sw_zend_read_property(swoole_http_client_class_entry_ptr, object, ZEND_STRL("port"), 0 TSRMLS_CC);
    convert_to_long(ztmp);
    http->port = Z_LVAL_P(ztmp);

    http->timeout = SW_CLIENT_DEFAULT_TIMEOUT;
    http->keep_alive = 1;
    http->state = HTTP_CLIENT_STATE_READY;

    //HttpClient settings
    zval *zset = sw_zend_read_property(swoole_http_client_class_entry_ptr, object, ZEND_STRL("setting"), 1 TSRMLS_CC);
    if (zset && !ZVAL_IS_NULL(zset))
    {
        vht = Z_ARRVAL_P(zset);
        /**
         * timeout
         */
        if (php_swoole_array_get_value(vht, "timeout", ztmp))
        {
            convert_to_double(ztmp);
            http->timeout = (double) Z_DVAL_P(ztmp);
        }
        /**
         * keep_alive
         */
        if (php_swoole_array_get_value(vht, "keep_alive", ztmp))
        {
            convert_to_boolean(ztmp);
            http->keep_alive = (int) Z_LVAL_P(ztmp);
        }
    }
    return http;
}

static PHP_METHOD(swoole_http_client, __construct)
{
    char *host;
    zend_size_t host_len;
    long port = 80;
    zend_bool ssl = SW_FALSE;

    if (zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC, "s|lb", &host, &host_len, &port, &ssl) == FAILURE)
    {
        return;
    }

    if (host_len <= 0)
    {
        swoole_php_fatal_error(E_ERROR, "host is empty.");
        RETURN_FALSE;
    }

    zend_update_property_stringl(swoole_http_client_class_entry_ptr, getThis(), ZEND_STRL("host"), host, host_len TSRMLS_CC);

    zend_update_property_long(swoole_http_client_class_entry_ptr,
    getThis(), ZEND_STRL("port"), port TSRMLS_CC);

    //init
    swoole_set_object(getThis(), NULL);

    zval *headers;
    SW_MAKE_STD_ZVAL(headers);
    array_init(headers);
    zend_update_property(swoole_http_client_class_entry_ptr, getThis(), ZEND_STRL("headers"), headers TSRMLS_CC);
    sw_zval_ptr_dtor(&headers);

    http_client_property *hcc;
    hcc = (http_client_property*) emalloc(sizeof(http_client_property));
    bzero(hcc, sizeof(http_client_property));
    swoole_set_property(getThis(), 0, hcc);

    int flags = SW_SOCK_TCP | SW_FLAG_ASYNC;

    if (ssl)
    {
#ifdef SW_USE_OPENSSL
        flags |= SW_SOCK_SSL;
#else
        swoole_php_fatal_error(E_ERROR, "require openssl library.");
#endif
    }

    zend_update_property_long(swoole_client_class_entry_ptr, getThis(), ZEND_STRL("type"), flags TSRMLS_CC);

    RETURN_TRUE;
}

static PHP_METHOD(swoole_http_client, __destruct)
{
    http_client *http = swoole_get_object(getThis());
    if (http)
    {
        zval *zobject = getThis();
        zval *retval = NULL;
        sw_zend_call_method_with_0_params(&zobject, swoole_http_client_class_entry_ptr, NULL, "close", &retval);
        if (retval)
        {
            sw_zval_ptr_dtor(&retval);
        }
    }
    http_client_property *hcc = swoole_get_property(getThis(), 0);
    efree(hcc);
    swoole_set_property(getThis(), 0, NULL);
}

static PHP_METHOD(swoole_http_client, set)
{
    zval *zset;
    if (zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC, "z", &zset) == FAILURE)
    {
        return;
    }
    php_swoole_array_separate(zset);
    zend_update_property(swoole_http_client_class_entry_ptr, getThis(), ZEND_STRL("setting"), zset TSRMLS_CC);
    RETURN_TRUE;
}

static PHP_METHOD(swoole_http_client, setHeaders)
{
    zval *headers;
    if (zend_parse_parameters(ZEND_NUM_ARGS()TSRMLS_CC, "z", &headers) == FAILURE)
    {
        return;
    }
    zend_update_property(swoole_http_client_class_entry_ptr, getThis(), ZEND_STRL("requestHeaders"), headers TSRMLS_CC);
    http_client_property *hcc = swoole_get_property(getThis(), 0);
    hcc->request_header = sw_zend_read_property(swoole_http_client_class_entry_ptr, getThis(), ZEND_STRL("requestHeaders"), 1 TSRMLS_CC);
    sw_copy_to_stack(hcc->request_header, hcc->_request_header);
    RETURN_TRUE;
}

static PHP_METHOD(swoole_http_client, setCookies)
{
    zval *cookies;
    if (zend_parse_parameters(ZEND_NUM_ARGS()TSRMLS_CC, "z", &cookies) == FAILURE)
    {
        return;
    }
    zend_update_property(swoole_http_client_class_entry_ptr, getThis(), ZEND_STRL("cookies"), cookies TSRMLS_CC);
    http_client_property *hcc = swoole_get_property(getThis(), 0);
    hcc->cookies = sw_zend_read_property(swoole_http_client_class_entry_ptr, getThis(), ZEND_STRL("cookies"), 1 TSRMLS_CC);
    sw_copy_to_stack(hcc->cookies, hcc->_cookies);

    RETURN_TRUE;
}

static PHP_METHOD(swoole_http_client, setData)
{
    zval *data;
    if (zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC, "z", &data) == FAILURE)
    {
        return;
    }
    zend_update_property(swoole_http_client_class_entry_ptr, getThis(), ZEND_STRL("requestBody"), data TSRMLS_CC);
    http_client_property *hcc = swoole_get_property(getThis(), 0);
    hcc->request_body = sw_zend_read_property(swoole_http_client_class_entry_ptr, getThis(), ZEND_STRL("requestBody"), 1 TSRMLS_CC);
    sw_copy_to_stack(hcc->request_body, hcc->_request_body);
    RETURN_TRUE;
}

static PHP_METHOD(swoole_http_client, addFile)
{
    char *path;
    zend_size_t l_path;
    char *name;
    zend_size_t l_name;
    char *type = NULL;
    zend_size_t l_type;
    char *filename = NULL;
    zend_size_t l_filename;
    long offset = 0;

    if (zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC, "ss|ss", &path, &l_path, &name, &l_name, &type, &l_type,
            &filename, &l_filename, &offset) == FAILURE)
    {
        return;
    }

    struct stat file_stat;
    if (stat(path, &file_stat) < 0)
    {
        swoole_php_sys_error(E_WARNING, "stat(%s) failed.", path);
        RETURN_FALSE;
    }
    if (file_stat.st_size <= 0)
    {
        swoole_php_sys_error(E_WARNING, "file[%s] size <= 0.", path);
        RETURN_FALSE;
    }
    if (offset > file_stat.st_size)
    {
        swoole_php_sys_error(E_WARNING, "offset[%ld] is too large.", offset);
        RETURN_FALSE;
    }
    if (type == NULL)
    {
        type = swoole_get_mimetype(path);
        l_type = strlen(type);
    }
    if (filename == NULL)
    {
        char *dot = strrchr(path, '/');
        if (dot == NULL)
        {
            filename = path;
            l_filename = l_path;
        }
        else
        {
            filename = dot + 1;
            l_filename = strlen(filename);
        }
    }

    http_client_property *hcc = swoole_get_property(getThis(), 0);
    zval *files;
    if (!hcc->request_upload_files)
    {
        SW_MAKE_STD_ZVAL(files);
        array_init(files);
        zend_update_property(swoole_http_client_class_entry_ptr, getThis(), ZEND_STRL("uploadFiles"), files TSRMLS_CC);
        sw_zval_ptr_dtor(&files);

        hcc->request_upload_files = sw_zend_read_property(swoole_http_client_class_entry_ptr, getThis(), ZEND_STRL("uploadFiles"), 0 TSRMLS_CC);
        sw_copy_to_stack(hcc->request_upload_files, hcc->_request_upload_files);
    }

    zval *upload_file;
    SW_MAKE_STD_ZVAL(upload_file);
    array_init(upload_file);

    sw_add_assoc_stringl_ex(upload_file, ZEND_STRS("path"), path, l_path, 1);
    sw_add_assoc_stringl_ex(upload_file, ZEND_STRS("name"), name, l_name, 1);
    sw_add_assoc_stringl_ex(upload_file, ZEND_STRS("filename"), filename, l_filename, 1);
    sw_add_assoc_stringl_ex(upload_file, ZEND_STRS("type"), type, l_type, 1);
    add_assoc_long(upload_file, "size", file_stat.st_size - offset);
    add_assoc_long(upload_file, "offset", offset);

    add_next_index_zval(hcc->request_upload_files, upload_file);
    RETURN_TRUE;
}

static PHP_METHOD(swoole_http_client, setMethod)
{
    zval *method;
    if (zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC, "z", &method) == FAILURE)
    {
        return;
    }
    convert_to_string(method);
    zend_update_property(swoole_http_client_class_entry_ptr, getThis(), ZEND_STRL("requestMethod"), method TSRMLS_CC);
    http_client_property *hcc = swoole_get_property(getThis(), 0);
    hcc->request_method = Z_STRVAL_P(method);
    RETURN_TRUE;
}

static PHP_METHOD(swoole_http_client, isConnected)
{
    http_client *http = swoole_get_object(getThis());
    if (!http || !http->cli)
    {
        RETURN_FALSE;
    }
    if (!http->cli->socket)
    {
        RETURN_FALSE;
    }
    RETURN_BOOL(http->cli->socket->active);
}

static PHP_METHOD(swoole_http_client, close)
{
    http_client *http = swoole_get_object(getThis());
    if (!http)
    {
        RETURN_FALSE;
    }
    swClient *cli = http->cli;
    if (!cli)
    {
        swoole_php_fatal_error(E_WARNING, "object is not instanceof swoole_http_client.");
        RETURN_FALSE;
    }
    if (!cli->socket)
    {
        swoole_php_error(E_WARNING, "not connected to the server");
        RETURN_FALSE;
    }
    if (cli->socket->closed)
    {
        swoole_php_error(E_WARNING, "client socket is closed.");
        RETURN_FALSE;
    }
    int ret = SW_OK;
    if (!cli->keep || swConnection_error(SwooleG.error) == SW_CLOSE)
    {
        cli->released = 1;
        ret = cli->close(cli);
        http_client_free(getThis() TSRMLS_CC);
    }
    else
    {
        //unset object
        swoole_set_object(getThis(), NULL);
    }
    SW_CHECK_RETURN(ret);
}

static PHP_METHOD(swoole_http_client, on)
{
    char *cb_name;
    zend_size_t cb_name_len;
    zval *zcallback;

    if (zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC, "sz", &cb_name, &cb_name_len, &zcallback) == FAILURE)
    {
        return;
    }

    http_client_property *hcc = swoole_get_property(getThis(), 0);
    if (strncasecmp("error", cb_name, cb_name_len) == 0)
    {
        zend_update_property(swoole_http_client_class_entry_ptr, getThis(), ZEND_STRL("onError"), zcallback TSRMLS_CC);
        hcc->onError = sw_zend_read_property(swoole_http_client_class_entry_ptr,  getThis(), ZEND_STRL("onError"), 0 TSRMLS_CC);
        sw_copy_to_stack(hcc->onError, hcc->_onError);
    }
    else if (strncasecmp("connect", cb_name, cb_name_len) == 0)
    {
        zend_update_property(swoole_http_client_class_entry_ptr, getThis(), ZEND_STRL("onConnect"), zcallback TSRMLS_CC);
        hcc->onConnect = sw_zend_read_property(swoole_http_client_class_entry_ptr,  getThis(), ZEND_STRL("onConnect"), 0 TSRMLS_CC);
        sw_copy_to_stack(hcc->onConnect, hcc->_onConnect);
    }
    else if (strncasecmp("close", cb_name, cb_name_len) == 0)
    {
        zend_update_property(swoole_http_client_class_entry_ptr, getThis(), ZEND_STRL("onClose"), zcallback TSRMLS_CC);
        hcc->onClose = sw_zend_read_property(swoole_http_client_class_entry_ptr,  getThis(), ZEND_STRL("onClose"), 0 TSRMLS_CC);
        sw_copy_to_stack(hcc->onClose, hcc->_onClose);
    }
    else if (strncasecmp("message", cb_name, cb_name_len) == 0)
    {
        zend_update_property(swoole_http_client_class_entry_ptr, getThis(), ZEND_STRL("onMessage"), zcallback TSRMLS_CC);
        hcc->onMessage = sw_zend_read_property(swoole_http_client_class_entry_ptr,  getThis(), ZEND_STRL("onMessage"), 0 TSRMLS_CC);
        sw_copy_to_stack(hcc->onMessage, hcc->_onMessage);
    }
    else
    {
        swoole_php_fatal_error(E_WARNING, "swoole_http_client: event callback[%s] is unknow", cb_name);
        RETURN_FALSE;
    }
    RETURN_TRUE;
}

static int http_client_parser_on_header_field(php_http_parser *parser, const char *at, size_t length)
{
// #if PHP_MAJOR_VERSION < 7
//     TSRMLS_FETCH_FROM_CTX(sw_thread_ctx ? sw_thread_ctx : NULL);
// #endif
    http_client* http = (http_client*)parser->data;
    //zval* zobject = (zval*)http->cli->socket->object;

    http->tmp_header_field_name = (char *)at;
    http->tmp_header_field_name_len = length;
    return 0;
}

static int http_client_parser_on_header_value(php_http_parser *parser, const char *at, size_t length)
{
#if PHP_MAJOR_VERSION < 7
    TSRMLS_FETCH_FROM_CTX(sw_thread_ctx ? sw_thread_ctx : NULL);
#endif

    http_client* http = (http_client*) parser->data;
    zval* zobject = (zval*) http->cli->object;
    zval *headers = sw_zend_read_property(swoole_http_client_class_entry_ptr, zobject, ZEND_STRL("headers"), 0 TSRMLS_CC);

    char *header_name = zend_str_tolower_dup(http->tmp_header_field_name, http->tmp_header_field_name_len);
    sw_add_assoc_stringl_ex(headers, header_name, http->tmp_header_field_name_len + 1, (char *) at, length, 1);
    //websocket client
    if (strcasecmp(header_name, "Upgrade") == 0 && strncasecmp(at, "websocket", length) == 0)
    {
        http->upgrade = 1;
    }
    else if (strcasecmp(header_name, "Set-Cookie") == 0)
    {
        int l_cookie = 0;
        if (strchr(at, ';'))
        {
            l_cookie = strchr(at, ';') - at;
        }
        else
        {
            l_cookie = strstr(at, "\r\n") - at;
        }
        int l_key = strchr(at, '=') - at;
        char keybuf[SW_HTTP_COOKIE_KEYLEN];

        zval *cookies = sw_zend_read_property(swoole_http_client_class_entry_ptr, zobject, ZEND_STRL("cookies"), 1 TSRMLS_CC);
        if (!cookies || ZVAL_IS_NULL(cookies))
        {
            SW_MAKE_STD_ZVAL(cookies);
            array_init(cookies);
            zend_update_property(swoole_http_client_class_entry_ptr, zobject, ZEND_STRL("cookies"), cookies TSRMLS_CC);
            sw_zval_ptr_dtor(&cookies);
        }

        memcpy(keybuf, at, l_key);
        keybuf[l_key] = '\0';
        sw_add_assoc_stringl_ex(cookies, keybuf, l_key + 1, (char*) at + l_key + 1, l_cookie - l_key - 1, 1);
    }
#ifdef SW_HAVE_ZLIB
    else if (strcasecmp(header_name, "Content-Encoding") == 0 && strncasecmp(at, "gzip", length) == 0)
    {
        http_init_gzip_stream(http);
        if (Z_OK != inflateInit2(&http->gzip_stream, MAX_WBITS + 16))
        {
            swWarn("inflateInit2() failed.");
            return SW_ERR;
        }
    }
    else if (strcasecmp(header_name, "Content-Encoding") == 0 && strncasecmp(at, "deflate", length) == 0)
    {
        http_init_gzip_stream(http);
        if (Z_OK != inflateInit(&http->gzip_stream))
        {
            swWarn("inflateInit() failed.");
            return SW_ERR;
        }
    }
#endif
    else if (strcasecmp(header_name, "Transfer-Encoding") == 0 && strncasecmp(at, "chunked", length) == 0)
    {
        http->chunked = 1;
    }
    efree(header_name);
    return 0;
}

#ifdef SW_HAVE_ZLIB
/**
 * init zlib stream
 */
static void http_init_gzip_stream(http_client *http)
{
    http->gzip = 1;
    memset(&http->gzip_stream, 0, sizeof(http->gzip_stream));
    swString_clear(swoole_zlib_buffer);
    http->gzip_stream.zalloc = php_zlib_alloc;
    http->gzip_stream.zfree = php_zlib_free;
}

static int http_response_uncompress(z_stream *stream, char *body, int length)
{
    int status = 0;

    stream->avail_in = length;
    stream->next_in = (Bytef *) body;

#if 0
    printf(SW_START_LINE"\nstatus=%d\tavail_in=%ld,\tavail_out=%ld,\ttotal_in=%ld,\ttotal_out=%ld\n", status, gzip_stream->avail_in, gzip_stream->avail_out,
                        gzip_stream->total_in, gzip_stream->total_out);
#endif

    while (1)
    {
        stream->avail_out = swoole_zlib_buffer->size - swoole_zlib_buffer->length;
        stream->next_out = (Bytef *) (swoole_zlib_buffer->str + swoole_zlib_buffer->length);

        status = inflate(stream, Z_SYNC_FLUSH);

#if 0
        printf("status=%d\tavail_in=%ld,\tavail_out=%ld,\ttotal_in=%ld,\ttotal_out=%ld,\tlength=%ld\n", status, gzip_stream->avail_in, gzip_stream->avail_out,
                gzip_stream->total_in, gzip_stream->total_out, swoole_zlib_buffer->length);
#endif
        if (status >= 0)
        {
            swoole_zlib_buffer->length = stream->total_out;
        }
        if (status == Z_STREAM_END)
        {
            return SW_OK;
        }
        else if (status == Z_OK)
        {
            if (swoole_zlib_buffer->length + 4096 >= swoole_zlib_buffer->size)
            {
                swString_extend(swoole_zlib_buffer, swoole_zlib_buffer->size * 2);
            }
            if (stream->avail_in == 0)
            {
                return SW_OK;
            }
        }
        else
        {
            return SW_ERR;
        }
    }
    return SW_ERR;
}
#endif

static int http_client_parser_on_body(php_http_parser *parser, const char *at, size_t length)
{
    http_client* http = (http_client*) parser->data;
    if (swString_append_ptr(http->body, (char *) at, length) < 0)
    {
        return -1;
    }
    if (http->download)
    {
#ifdef SW_HAVE_ZLIB
        if (http->gzip)
        {
            if (http_response_uncompress(&http->gzip_stream, http->body->str, http->body->length))
            {
                return -1;
            }
            if (swoole_sync_writefile(http->file_fd, (void*) swoole_zlib_buffer->str + swoole_zlib_buffer->offset,
                    swoole_zlib_buffer->length - swoole_zlib_buffer->offset) < 0)
            {
                return -1;
            }
            swoole_zlib_buffer->offset = swoole_zlib_buffer->length;
        }
        else
#endif
        {
            if (swoole_sync_writefile(http->file_fd, (void*) http->body->str, http->body->length) < 0)
            {
                return -1;
            }
        }
        swString_clear(http->body);
    }
    return 0;
}

static int http_client_parser_on_headers_complete(php_http_parser *parser)
{
    http_client* http = (http_client*) parser->data;
    //no content-length
    if (http->chunked == 0 && parser->content_length == -1)
    {
        http->state = HTTP_CLIENT_STATE_WAIT_CLOSE;
    }
    return 0;
}

static int http_client_parser_on_message_complete(php_http_parser *parser)
{
#if PHP_MAJOR_VERSION < 7
    TSRMLS_FETCH_FROM_CTX(sw_thread_ctx ? sw_thread_ctx : NULL);
#endif

    http_client* http = (http_client*) parser->data;
    zval* zobject = (zval*) http->cli->object;

#ifdef SW_HAVE_ZLIB
    if (http->gzip && http->body->length > 0)
    {
        if (http_response_uncompress(&http->gzip_stream, http->body->str, http->body->length) == SW_ERR)
        {
            swWarn("http_response_uncompress failed.");
            return 0;
        }
        zend_update_property_stringl(swoole_http_client_class_entry_ptr, zobject, ZEND_STRL("body"), swoole_zlib_buffer->str, swoole_zlib_buffer->length TSRMLS_CC);
    }
    else
#endif
    {
        zend_update_property_stringl(swoole_http_client_class_entry_ptr, zobject, ZEND_STRL("body"), http->body->str, http->body->length TSRMLS_CC);
    }

    http->completed = 1;

    //http status code
    zend_update_property_long(swoole_http_client_class_entry_ptr, zobject, ZEND_STRL("statusCode"), http->parser.status_code TSRMLS_CC);

    return 0;
}

static PHP_METHOD(swoole_http_client, execute)
{
    int ret;
    char *uri = NULL;
    zend_size_t uri_len = 0;
    zval *finish_cb;

    if (zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC, "sz", &uri, &uri_len, &finish_cb) == FAILURE)
    {
        return;
    }
    ret = http_client_execute(getThis(), uri, uri_len, finish_cb TSRMLS_CC);
    SW_CHECK_RETURN(ret);
}

static PHP_METHOD(swoole_http_client, get)
{
    int ret;
    char *uri = NULL;
    zend_size_t uri_len = 0;
    zval *finish_cb;

    if (zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC, "sz", &uri, &uri_len, &finish_cb) == FAILURE)
    {
        return;
    }
    ret = http_client_execute(getThis(), uri, uri_len, finish_cb TSRMLS_CC);
    SW_CHECK_RETURN(ret);
}

static PHP_METHOD(swoole_http_client, download)
{
    int ret;
    char *uri = NULL;
    zend_size_t uri_len = 0;
    zval *finish_cb;
    zval *download_file;
    off_t offset = 0;

    if (zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC, "szz", &uri, &uri_len, &download_file, &finish_cb, &offset) == FAILURE)
    {
        return;
    }

    http_client_property *hcc = swoole_get_property(getThis(), 0);
    zend_update_property(swoole_http_client_class_entry_ptr, getThis(), ZEND_STRL("downloadFile"), download_file TSRMLS_CC);
    hcc->download_file = sw_zend_read_property(swoole_http_client_class_entry_ptr, getThis(), ZEND_STRL("downloadFile"), 1 TSRMLS_CC);
    hcc->download_offset = offset;
    sw_copy_to_stack(hcc->download_file, hcc->_download_file);
    ret = http_client_execute(getThis(), uri, uri_len, finish_cb TSRMLS_CC);
    SW_CHECK_RETURN(ret);
}

static PHP_METHOD(swoole_http_client, post)
{
    int ret;
    char *uri = NULL;
    zend_size_t uri_len = 0;
    zval *callback;
    zval *post_data;

    if (zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC, "szz", &uri, &uri_len, &post_data, &callback) == FAILURE)
    {
        return;
    }

    if (Z_TYPE_P(post_data) != IS_ARRAY && Z_TYPE_P(post_data) != IS_STRING)
    {
        swoole_php_fatal_error(E_WARNING, "post data must be string or array.");
        RETURN_FALSE;
    }

    http_client_property *hcc = swoole_get_property(getThis(), 0);
    zend_update_property(swoole_http_client_class_entry_ptr, getThis(), ZEND_STRL("requestBody"), post_data TSRMLS_CC);
    hcc->request_body = sw_zend_read_property(swoole_http_client_class_entry_ptr, getThis(), ZEND_STRL("requestBody"), 1 TSRMLS_CC);
    sw_copy_to_stack(hcc->request_body, hcc->_request_body);
    ret = http_client_execute(getThis(), uri, uri_len, callback TSRMLS_CC);
    SW_CHECK_RETURN(ret);
}

static PHP_METHOD(swoole_http_client, upgrade)
{
    int ret;
    char *uri = NULL;
    zend_size_t uri_len = 0;
    zval *finish_cb;

    if (zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC, "sz", &uri, &uri_len, &finish_cb) == FAILURE)
    {
        return;
    }

    http_client_property *hcc = swoole_get_property(getThis(), 0);
    if (!hcc->onMessage)
    {
        swoole_php_fatal_error(E_WARNING, "cannot use the upgrade method, must first register the onMessage event callback.");
        return;
    }

    zval *request_header;
    if (!hcc->request_header)
    {
        SW_MAKE_STD_ZVAL(request_header);
        array_init(request_header);
        zend_update_property(swoole_http_client_class_entry_ptr, getThis(), ZEND_STRL("requestHeaders"), request_header TSRMLS_CC);
        hcc->request_header = sw_zend_read_property(swoole_http_client_class_entry_ptr, getThis(), ZEND_STRL("requestHeaders"), 1 TSRMLS_CC);
        sw_copy_to_stack(hcc->request_header, hcc->_request_header);
        sw_zval_ptr_dtor(&request_header);
    }

    char buf[SW_WEBSOCKET_KEY_LENGTH + 1];
    http_client_create_token(SW_WEBSOCKET_KEY_LENGTH, buf);

    sw_add_assoc_string(hcc->request_header, "Connection", "Upgrade", 1);
    sw_add_assoc_string(hcc->request_header, "Upgrade", "websocket", 1);

    int encoded_value_len = 0;

#if PHP_MAJOR_VERSION < 7
    uchar *encoded_value = php_base64_encode((const unsigned char *)buf, SW_WEBSOCKET_KEY_LENGTH, &encoded_value_len);
    add_assoc_stringl(hcc->request_header, "Sec-WebSocket-Key", (char*)encoded_value, encoded_value_len, 0);
#else
    zend_string *str = php_base64_encode((const unsigned char *)buf, SW_WEBSOCKET_KEY_LENGTH);
    char *encoded_value = str->val;
    encoded_value_len = str->len;
    add_assoc_stringl(hcc->request_header, "Sec-WebSocket-Key", (char*)encoded_value, encoded_value_len);
    zend_string_free(str);
#endif

    ret = http_client_execute(getThis(), uri, uri_len, finish_cb TSRMLS_CC);
    SW_CHECK_RETURN(ret);
}

static PHP_METHOD(swoole_http_client, push)
{
    char *data;
    zend_size_t length;
    long opcode = WEBSOCKET_OPCODE_TEXT_FRAME;
    zend_bool fin = 1;

    if (zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC, "s|lb", &data, &length, &opcode, &fin) == FAILURE)
    {
        return;
    }

    if (opcode > WEBSOCKET_OPCODE_PONG)
    {
        swoole_php_fatal_error(E_WARNING, "opcode max 10");
        RETURN_FALSE;
    }

    if (length == 0)
    {
        swoole_php_fatal_error(E_WARNING, "data is empty.");
        RETURN_FALSE;
    }

    http_client *http = swoole_get_object(getThis());
    if (!http->cli)
    {
        swoole_php_fatal_error(E_WARNING, "object is not instanceof swoole_http_client.");
        RETURN_FALSE;
    }

    if (!http->cli->socket)
    {
        swoole_php_error(E_WARNING, "not connected to the server");
        RETURN_FALSE;
    }

    if (!http->upgrade)
    {
        swoole_php_fatal_error(E_WARNING, "websocket handshake failed, cannot push data.");
        RETURN_FALSE;
    }

    swString_clear(http_client_buffer);
    swWebSocket_encode(http_client_buffer, data, length, opcode, (int) fin, http->websocket_mask);
    SW_CHECK_RETURN(http->cli->send(http->cli, http_client_buffer->str, http_client_buffer->length, 0));
}