qq 登录api php类(4)

function get_urlencode_string($params)
{
ksort($params);
$normalized = array();
foreach($params as $key => $val)
{
$normalized[] = $key.”=”.rawurlencode($val);
}
return implode(“&”, $normalized);
}
/**
* @brief 检查openid是否合法
*
* @param $openid  与用户QQ号码一一对应
* @param $timestamp　时间戳
* @param $sig　　签名值
*
* @return true or false
*/
function is_valid_openid($openid, $timestamp, $sig)
{
$key = $this->appkey;
$str = $openid.$timestamp;
$signature = $this->get_signature($str, $key);
//echo “sig:$sig\n”;
//echo “str:$str\n”;
return $sig == $signature;
}
/**
* @brief 所有Get请求都可以使用这个方法
*
* @param $url
* @param $appid
* @param $appkey
* @param $access_token
* @param $access_token_secret
* @param $openid
*
* @return true or false
*/
function do_get($url, $access_token, $access_token_secret, $openid)
{
$sigstr = “GET”.”&”.rawurlencode(“$url”).”&”;
//必要参数, 不要随便更改!!
$params = $_GET;
$params["oauth_version"]          = “1.0″;
$params["oauth_signature_method"] = “HMAC-SHA1″;
$params["oauth_timestamp"]        = time();
$params["oauth_nonce"]            = mt_rand();
$params["oauth_consumer_key"]     = $this->appid;
$params["oauth_token"]            = $access_token;
$params["openid"]                 = $openid;
unset($params["oauth_signature"]);
//参数按照字母升序做序列化
$normalized_str = $this->get_normalized_string($params);
$sigstr        .= rawurlencode($normalized_str);
//签名,确保php版本支持hash_hmac函数
$key = $this->appkey.”&”.$access_token_secret;
$signature = $this->get_signature($sigstr, $key);
$url      .= “?”.$normalized_str.”&”.”oauth_signature=”.rawurlencode($signature);
//echo “$url\n”;
return file_get_contents($url);
}
/**
* @brief 所有multi-part post 请求都可以使用这个方法
*
* @param $url
* @param $appid
* @param $appkey
* @param $access_token
* @param $access_token_secret
* @param $openid
*
*/
function do_multi_post($url, $appid, $appkey, $access_token, $access_token_secret, $openid)
{