之前需要下载SAE上的日志存入数据库，因此研究了下SAE的签名认证和日志下载。这个链接是SAE官方给出的API文档。https://www.sinacloud.com/doc/api.html#qian-ming-fang-fa，虽然讲的方法很清晰，但并不是很具体。然后Python版本的网上比比皆是，我这里不费过多笔墨，看他的官方文档也不困难。
下面的方法是获得SAE的签名认证：
public function getAuthorization($accesskey,$secretkey,$time,$uri)
{
$header = array(
'x-sae-timestamp' => $time,
'x-sae-accesskey' => strtolower($accesskey)
);
ksort($header);
$sae_header = array('GET',$uri);
foreach ($header as $key => $value) {
$sae_header[count($sae_header)] = $key.':'.$value;
}
$ret = implode(PHP_EOL, $sae_header);
$auth = 'SAEV1_HMAC_SHA256 '.base64_encode(hash_hmac('sha256',$ret,$secretkey,true));
return $auth;
}
代码解释：传入参数L：$accesskey,$secretkey,$time,$uri，先将所有x-sae-开头的http header(小写)按name排序后用冒号链接name和value，放在method、uri(包含query string，不要转义)后以换行符分隔拼接为签名原文字符串，再以Secretkey为密钥用hmac sha256计算哈希值（二进制），再经base64编码，前面加上”SAEV1_HMAC_SHA256 “，得到本次请求的认证签名，即Authorization字段。
获得签名认证之后还需要获得header，方法如下：
public function getheader($accesskey,$auth,$time)
{
return array(
'Host: g.sae.sina.com.cn',
'Accept: text/plain',
'x-sae-accesskey: '.$accesskey,
'x-sae-timestamp: '.$time,
'Authorization: '. $auth
);
}得到header之后就非常简单了：可以直接发送请求来获取SAE的日志：
public function get($uri,$header){
$host = 'http://g.sae.sina.com.cn'.$uri;
$ch = curl_init();
curl_setopt($ch, CURLOPT_URL,$host);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
curl_setopt($ch, CURLOPT_HTTPHEADER, $header);
curl_setopt($ch, CURLOPT_HEADER, 1);
$ret = curl_exec($ch);
curl_close($ch);
return $ret;
}
使用上面的方法在配合具体的下载要求就可以随意下载SAE上的日志了。
下面附上完整的代码实例，这只是按照我的要求下载的日志并且存入了数据库，仅供参考：
public function log()
{
//$uri = '/log/http/2016-08-03:2016-08-05/'.$_SERVER['HTTP_APPVERSION'].'3-access.log';
$date = date('Y-m-d',strtotime('-1 day'));
$time = time();
$acc = 'lwjljzn2wz';
$sec = '1hkzhw2y51wl2w1i21hl4miyj2yj44l5x1404l00';
$uri = '/log/http/'.$date.'/3-access.log?grep/3.dxever.applinzi.com.*POST|fields/ /1/2/5';
$uri_1 = '/log/http/'.$date.'/3-access.log?grep/3.dxever.applinzi.com.*POST|fields/"/2';
//$uri = '/log/http/2016-08-09/3-access.log?fields/ /1/2/3';
$g = D('godview');
$auth = $g->getAuthorization($acc,$sec,$time,$uri);
$header = $g->getheader($acc,$auth,$time);
$ret = $g->get($uri,$header);
$time_1 = time();
$auth_1 = $g->getAuthorization($acc,$sec,$time_1,$uri_1);
$header_1 = $g->getheader($acc,$auth_1,$time_1);
$ret_1 = $g->get($uri_1,$header_1);
$time_mom = date('Ymd',strtotime('-1 day'));
$data = explode("3.dxever.applinzi.com",$ret);
$data_1 = explode("POST ",$ret_1); unset($data_1[0]);
unset($data[0]);
foreach ($data as $k => $v)
{ preg_match_all('/\/index.php\/Area\/School\/GetSchoolComment\/token(.*) HTTP\/1.0/',$data_1["$k"],$token);
if ($token[1][0] != NULL) {
$log['user_id'] = $g->get_id($token[1][0]);
}else {
$log['user_id'] = NULL;
}
preg_match_all('/\/(.*) HTTP\/1.0/',$data_1["$k"],$url); preg_match_all('/((([1-9]?|1\d)\d|2([0-4]\d|5[0-5]))\.){3}(([1-9]?|1\d)\d|2([0-4]\d|5[0-5]))/',$v,$ip);
preg_match_all('/\/2016:(.*)/',$v,$ti);
// if ($url[1][0]==NULL) {
// // $url = 'a';
// preg_match_all('/GET (.*?) HTTP/',$v,$url);
// }
// preg_match_all('/Mozilla(.*)/',$v,$head);
// $area = explode(" ",$time);
$log['ip'] = $ip[0][0];
$log['url'] = $url[1][0];
$log['head'] = $head[0][0];
$log['area'] = $area[1];
// $time = $area[0];
// $t = explode(":",$time,2);
$log['time1'] = $time_mom;
$log['time2'] = str_replace(':','',$ti[1][0]);
// dump($log);
$sta = $g->save_log($log);
}
if($sta){
$this->response(returnSuccess(), 'json');
}else {
$this->response(returnWrong(), 'json');
} }
下面为用到的方法的全部整合：
public function getAuthorization($accesskey,$secretkey,$time,$uri)
{
$header = array(
'x-sae-timestamp' => $time,
'x-sae-accesskey' => strtolower($accesskey)
);
ksort($header);
$sae_header = array('GET',$uri);
foreach ($header as $key => $value) {
$sae_header[count($sae_header)] = $key.':'.$value;
}
$ret = implode(PHP_EOL, $sae_header);
$auth = 'SAEV1_HMAC_SHA256 '.base64_encode(hash_hmac('sha256',$ret,$secretkey,true));
return $auth;
} public function getheader($accesskey,$auth,$time)
{
return array(
'Host: g.sae.sina.com.cn',
'Accept: text/plain',
'x-sae-accesskey: '.$accesskey,
'x-sae-timestamp: '.$time,
'Authorization: '. $auth
);
} public function get($uri,$header){
$host = 'http://g.sae.sina.com.cn'.$uri;
$ch = curl_init();
curl_setopt($ch, CURLOPT_URL,$host);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
curl_setopt($ch, CURLOPT_HTTPHEADER, $header);
curl_setopt($ch, CURLOPT_HEADER, 1);
$ret = curl_exec($ch);
curl_close($ch);
return $ret;
} public function save_log($log)
{
$a = M('log')->add($log);
return $a;
}
