php的http请求类

<?php
namespace app\lib;
class Lib_http{
//发起网络请求
    public function call($url, $args = null, $method = "post", $testflag = 0, $timeout = 60, $headers = array())
    {/*{{{*/
        Lib_log::set_log('http',$url);
        $ret = false;
        $i = 0;
        while ($ret === false) {
            if ($i > 1)
                break;
            if ($i > 0) { 
               sleep(1);
            }
            $ret = $this->callOnce($url, $args, $method, false, $timeout, $headers);
            $i++;
        }
        return $ret;
    }/*}}}*/
    private function callOnce($url, $args = null, $method = "post", $withCookie = false, $timeout = CURL_TIMEOUT, $headers = array())
    {/*{{{*/
        $ch = curl_init();
        if ($method == "post") {
            $data =$this->convert($args);
            curl_setopt($ch, CURLOPT_POSTFIELDS, $data);
            curl_setopt($ch, CURLOPT_POST, 1);
        } else {
            $data =$this->convert($args);
            if ($data) {
                if (stripos($url, "?") > 0) {
                    $url .= "&$data";
                } else {
                    $url .= "?$data";
                }
            }
        }
        curl_setopt($ch, CURLOPT_URL, $url);
        curl_setopt($ch, CURLOPT_TIMEOUT, $timeout);
        curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
       // curl_setopt($ch, CURLOPT_HEADER, true);
        if (!empty($headers)) {
            curl_setopt($ch, CURLOPT_HTTPHEADER, $headers);
        }
       if ($withCookie) {
            curl_setopt($ch, CURLOPT_COOKIEJAR, $_COOKIE);
        }
        $r = curl_exec($ch);
        curl_close($ch);
       return $r;
    }/*}}}*/
    private  function convert(&$args)
    {/*{{{*/
        $data = '';
        if (is_array($args)) {
            foreach ($args as $key => $val) {
                if (is_array($val)) {
                    foreach ($val as $k => $v) {
                        $data .= $key . '[' . $k . ']=' . rawurlencode($v) . '&';
                    }
                } else {
                    $data .= "$key=" . rawurlencode($val) . "&";
                }
            }
            return trim($data, "&");
        }        return $args;
    }/*}}}*/}

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