www.gusucode.com > Ectouch手机端网购商城系统PHP版源码程序 > ectouch/include/library/EcsTransport.class.php
<?php
/* 访问控制 */
defined('IN_ECTOUCH') or die('Deny Access');
/**
* ECSHOP 服务器之间数据传输器。采集到的信息包括HTTP头和HTTP体，
* 并以一维数组的形式返回，如：array('header' => 'bar', 'body' => 'foo')。
*/
class EcsTransport {
/**
* 脚本执行时间。－1表示采用PHP的默认值。
*
* @access private
* @var integer $time_limit
*/
var $time_limit = -1;
/**
* 在多少秒之内，如果连接不可用，脚本就停止连接。－1表示采用PHP的默认值。
*
* @access private
* @var integer $connect_timeout
*/
var $connect_timeout = -1;
/**
* 连接后，限定多少秒超时。－1表示采用PHP的默认值。此项仅当采用CURL库时启用。
*
* @access private
* @var integer $stream_timeout
*/
var $stream_timeout = -1;
/**
* 是否使用CURL库来连接。false表示采用fsockopen进行连接。
*
* @access private
* @var boolean $use_curl
*/
var $use_curl = false;
/**
* 构造函数
*
* @access public
* @param integer $time_limit
* @param integer $connect_timeout
* @param integer $stream_timeout
* @param boolean $use_curl
* @return void
*/
function __construct($time_limit = -1, $connect_timeout = -1, $stream_timeout = -1, $use_curl = false) {
$this->time_limit = $time_limit;
$this->connect_timeout = $connect_timeout;
$this->stream_timeout = $stream_timeout;
$this->use_curl = $use_curl;
}
/**
* 请求远程服务器
*
* @access public
* @param string $url 远程服务器的URL
* @param mix $params 查询参数，形如bar=foo&foo=bar；或者是一维关联数组，形如array('a'=>'aa',...)
* @param string $method 请求方式，是POST还是GET
* @param array $my_header 用户要发送的头部信息，为一维关联数组，形如array('a'=>'aa',...)
* @return array 成功返回一维关联数组，形如array('header'=>'bar', 'body'=>'foo')，
* 重大错误程序直接停止运行，否则返回false。
*/
function request($url, $params = '', $method = 'POST', $my_header = '') {
$fsock_exists = function_exists('fsockopen');
$curl_exists = function_exists('curl_init');
if (!$fsock_exists && !$curl_exists) {
die('No method available!');
}
if (!$url) {
die('Invalid url!');
}
if ($this->time_limit > -1) {//如果为0，不限制执行时间
set_time_limit($this->time_limit);
}
$method = $method === 'GET' ? $method : 'POST';
$response = '';
$temp_str = '';
/* 格式化将要发要送的参数 */
if ($params && is_array($params)) {
foreach ($params AS $key => $value) {
$temp_str .= '&' . $key . '=' . $value;
}
$params = preg_replace('/^&/', '', $temp_str);
}
/* 如果fsockopen存在，且用户不指定使用curl，则调用use_socket函数 */
if ($fsock_exists && !$this->use_curl) {
$response = $this->use_socket($url, $params, $method, $my_header);
}
/* 只要上述条件中的任一个不成立，流程就转向这里，这时如果curl模块可用，就调用use_curl函数 */ elseif ($curl_exists) {
$response = $this->use_curl($url, $params, $method, $my_header);
}
/* 空响应或者传输过程中发生错误，程序将返回false */
if (!$response) {
return false;
}
return $response;
}
/**
* 使用fsockopen进行连接
*
* @access private
* @param string $url 远程服务器的URL
* @param string $params 查询参数，形如bar=foo&foo=bar
* @param string $method 请求方式，是POST还是GET
* @param array $my_header 用户要发送的头部信息，为一维关联数组，形如array('a'=>'aa',...)
* @return array 成功返回一维关联数组，形如array('header'=>'bar', 'body'=>'foo')，
* 否则返回false。
*/
function use_socket($url, $params, $method, $my_header) {
$query = '';
$auth = '';
$content_type = '';
$content_length = '';
$request_body = '';
$request = '';
$http_response = '';
$temp_str = '';
$error = '';
$errstr = '';
$crlf = $this->generate_crlf();
if ($method === 'GET') {
$query = $params ? "?$params" : '';
} else {
$request_body = $params;
$content_type = 'Content-Type: application/x-www-form-urlencoded' . $crlf;
$content_length = 'Content-Length: ' . strlen($request_body) . $crlf . $crlf;
}
$url_parts = $this->parse_raw_url($url);
$path = $url_parts['path'] . $query;
if (!empty($url_parts['user'])) {
$auth = 'Authorization: Basic '
. base64_encode($url_parts['user'] . ':' . $url_parts['pass']) . $crlf;
}
/* 格式化自定义头部信息 */
if ($my_header && is_array($my_header)) {
foreach ($my_header AS $key => $value) {
$temp_str .= $key . ': ' . $value . $crlf;
}
$my_header = $temp_str;
}
/* 构造HTTP请求头部 */
$request = "$method $path HTTP/1.0$crlf"
. 'Host: ' . $url_parts['host'] . $crlf
. $auth
. $my_header
. $content_type
. $content_length
. $request_body;
if ($this->connect_timeout > -1) {
$fp = @fsockopen($url_parts['host'], $url_parts['port'], $error, $errstr, $this->connect_timeout);
} else {
$fp = @fsockopen($url_parts['host'], $url_parts['port'], $error, $errstr);
}
if (!$fp) {
return false; //打开失败
}
if (!@fwrite($fp, $request)) {
return false; //写入失败
}
while (!feof($fp)) {
$http_response .= fgets($fp);
}
if (!$http_response) {
return false; //空响应
}
$separator = '/\r\n\r\n|\n\n|\r\r/';
list($http_header, $http_body) = preg_split($separator, $http_response, 2);
$http_response = array('header' => $http_header, //header肯定有值
'body' => $http_body); //body可能为空
@fclose($fp);
return $http_response;
}
/**
* 使用curl进行连接
*
* @access private
* @param string $url 远程服务器的URL
* @param string $params 查询参数，形如bar=foo&foo=bar
* @param string $method 请求方式，是POST还是GET
* @param array $my_header 用户要发送的头部信息，为一维关联数组，形如array('a'=>'aa',...)
* @return array 成功返回一维关联数组，形如array('header'=>'bar', 'body'=>'foo')，
* 失败返回false。
*/
function use_curl($url, $params, $method, $my_header) {
/* 开始一个新会话 */
$curl_session = curl_init();
/* 基本设置 */
curl_setopt($curl_session, CURLOPT_FORBID_REUSE, true); // 处理完后，关闭连接，释放资源
curl_setopt($curl_session, CURLOPT_HEADER, true); //结果中包含头部信息
curl_setopt($curl_session, CURLOPT_RETURNTRANSFER, true); //把结果返回，而非直接输出
curl_setopt($curl_session, CURLOPT_HTTP_VERSION, CURL_HTTP_VERSION_1_0); //采用1.0版的HTTP协议
$url_parts = $this->parse_raw_url($url);
/* 设置验证策略 */
if (!empty($url_parts['user'])) {
$auth = $url_parts['user'] . ':' . $url_parts['pass'];
curl_setopt($curl_session, CURLOPT_USERPWD, $auth);
curl_setopt($curl_session, CURLOPT_HTTPAUTH, CURLAUTH_BASIC);
}
$header = array();
/* 设置主机 */
$header[] = 'Host: ' . $url_parts['host'];
/* 格式化自定义头部信息 */
if ($my_header && is_array($my_header)) {
foreach ($my_header AS $key => $value) {
$header[] = $key . ': ' . $value;
}
}
if ($method === 'GET') {
curl_setopt($curl_session, CURLOPT_HTTPGET, true);
$url .= $params ? '?' . $params : '';
} else {
curl_setopt($curl_session, CURLOPT_POST, true);
$header[] = 'Content-Type: application/x-www-form-urlencoded';
$header[] = 'Content-Length: ' . strlen($params);
curl_setopt($curl_session, CURLOPT_POSTFIELDS, $params);
}
/* 设置请求地址 */
curl_setopt($curl_session, CURLOPT_URL, $url);
/* 设置头部信息 */
curl_setopt($curl_session, CURLOPT_HTTPHEADER, $header);
if ($this->connect_timeout > -1) {
curl_setopt($curl_session, CURLOPT_CONNECTTIMEOUT, $this->connect_timeout);
}
if ($this->stream_timeout > -1) {
curl_setopt($curl_session, CURLOPT_TIMEOUT, $this->stream_timeout);
}
/* 发送请求 */
$http_response = curl_exec($curl_session);
if (curl_errno($curl_session) != 0) {
return false;
}
$separator = '/\r\n\r\n|\n\n|\r\r/';
list($http_header, $http_body) = preg_split($separator, $http_response, 2);
$http_response = array('header' => $http_header, //肯定有值
'body' => $http_body); //可能为空
curl_close($curl_session);
return $http_response;
}
/**
* Similar to PHP's builtin parse_url() function, but makes sure what the schema,
* path and port keys are set to http, /, 80 respectively if they're missing
*
* @access private
* @param string $raw_url Raw URL to be split into an array
* @author http://www.cpaint.net/
* @return array
*/
function parse_raw_url($raw_url) {
$retval = array();
$raw_url = (string) $raw_url;
// make sure parse_url() recognizes the URL correctly.
if (strpos($raw_url, '://') === false) {
$raw_url = 'http://' . $raw_url;
}
// split request into array
$retval = parse_url($raw_url);
// make sure a path key exists
if (!isset($retval['path'])) {
$retval['path'] = '/';
}
// set port to 80 if none exists
if (!isset($retval['port'])) {
$retval['port'] = '80';
}
return $retval;
}
/**
* 产生一个换行符，不同的操作系统会有不同的换行符
*
* @access private
* @return string 用双引号引用的换行符
*/
function generate_crlf() {
$crlf = '';
if (strtoupper(substr(PHP_OS, 0, 3) === 'WIN')) {
$crlf = "\r\n";
} elseif (strtoupper(substr(PHP_OS, 0, 3) === 'MAC')) {
$crlf = "\r";
} else {
$crlf = "\n";
}
return $crlf;
}
}
?>