腾讯云 人脸识别 人脸对比 v3 签名
程序员文章站
2022-03-06 13:18:26
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调用 对比用的图片自己调整方法即可，此处写死
$logic = new \app\common\logic\TencentPictureContrastLogic(); p($logic->contrast());
封装方法
<?php
namespace app\common\logic;
/**
* 腾讯云图片对比逻辑层
* @author 朝游东海
* 官方文档
* https://cloud.tencent.com/document/product/867/32772
* https://cloud.tencent.com/document/product/867/32802
*/
class TencentPictureContrastLogic
{
private $requestDomain = 'https://iai.ap-chengdu.tencentcloudapi.com' ; //请求域名
private $header;
private $secretId = ''; //用于标识 API 调用者身份，可以简单类比为用户名。 本文使用的安全凭证为密钥，密钥包括 SecretId 和 SecretKey。每个用户最多可以拥有两对密钥。
private $secretKey = ''; //用于验证 API 调用者的身份，可以简单类比为密码。 申请安全凭证
private $host = 'iai.tencentcloudapi.com';
private $server = 'iai';
private $version = '2018-03-01'; // '2020-03-03'; //
private $action = 'CompareFace';
private $region = 'ap-chengdu';
private $timestamp;
private $algorithm = 'TC3-HMAC-SHA256';
private $canonicalHeaders;
private $signedHeaders;
private $canonicalRequest = '';
private $stringToSign = '';
private $credentialScope; //凭证范围
private $signature; //计算签名
private $authorization;
/**
* 图片对比
*/
public function contrast()
{
$this->setCommonRequestHeader(); //设置请求公共头
$this->setCanonicalHeaders();
$this->setSignedHeaders();
$this->setCanonicalRequest(); //接规范请求串
$this->setSplitSign(); //拼接待签名字符串
$this->setSign(); //计算签名
$this->setAuthorization(); //拼接 Authorization
return $this->curlRequest();
}
//设置公共参数
private function setCommonRequestHeader()
{
$this->timestamp = time();
$this->header = [
'Content-Type'=>'application/json; charset=utf-8', //application/x-www-form-urlencoded
'Host'=>$this->host,
'X-TC-Action'=>$this->action,
'X-TC-Timestamp'=> $this->timestamp,
'X-TC-Version'=>$this->version,
'X-TC-Region'=>$this->region,
'SignatureMethod'=>$this->algorithm
];
}
/**
* step 1: build canonical request string
* 获取拼接规范请求穿
* https://cloud.tencent.com/document/api/867/32774
*/
private function setCanonicalRequest()
{
$httpRequestMethod = "POST";
$canonicalUri = "/";
$canonicalQueryString = "";
$canonicalHeaders = $this->canonicalHeaders;
$signedHeaders = $this->signedHeaders;
//$payload = '{"Limit": 1, "Filters": [{"Values": ["\u672a\u547d\u540d"], "Name": "instance-name"}]}';
$payload = json_encode($this->setHashedRequestPayload());
$hashedRequestPayload = hash("SHA256", $payload);
$canonicalRequest = $httpRequestMethod."\n"
.$canonicalUri."\n"
.$canonicalQueryString."\n"
.$canonicalHeaders."\n"
.$signedHeaders."\n"
.$hashedRequestPayload;
$this->canonicalRequest =$canonicalRequest;
}
/**
* 参与签名的头部信息，至少包含 host 和 content-type 两个头部，也可加入自定义的头部参与签名以提高自身请求的唯一性和安全性。
*拼接规则：
* 头部 key 和 value 统一转成小写，并去掉首尾空格，按照 key:value\n 格式拼接；
* 多个头部，按照头部 key（小写）的 ASCII 升序进行拼接。
*/
private function setCanonicalHeaders()
{
$tmp = $tmp1 = [];
foreach( $this->header as $k=>$v ){
$tmp[strtolower(trim($k))] = strtolower(trim($v));
}
ksort($tmp);
$srt = '';
foreach($tmp as $k=>$v){
$srt .= $k.':'.$v."\n";
}
$this->canonicalHeaders = $srt;
}
/**
* 参与签名的头部信息，说明此次请求有哪些头部参与了签名，和 CanonicalHeaders 包含的头部内容是一一对应的。content-type 和 host 为必选头部。
*拼接规则：
* 头部 key 统一转成小写；
* 多个头部 key（小写）按照 ASCII 升序进行拼接，并且以分号（;）分隔。
* 此示例为 content-type;host
*/
private function setSignedHeaders()
{
$tmpdd = $tmp1 = [];
foreach( $this->header as $k=>$v ){
$tmpdd[strtolower(trim($k))] = strtolower(trim($v));
}
ksort($tmpdd);
$keys = array_keys($tmpdd);
$srt = '';
foreach($keys as $k=>$v){
$srt .= $v.';';
}
$reqPar = '';
if (strlen($srt) > 0) {
$reqPar = substr($srt, 0, strlen($srt) - 1);
}
$this->signedHeaders = $reqPar;
}
private function setHashedRequestPayload()
{
//同一脸
$a='http://xcx.wqzydh.cn/uploads/imgs/20200707/d362d2ee5a235c7798c04f8524a1a5b7.png'; //同一脸，小，笑
$b='http://xcx.wqzydh.cn/uploads/imgs/20200707/a9e33641c3a75e6828440c74cbd820c6.png'; //同一脸，小，不笑，下图为放大版
$d='http://xcx.wqzydh.cn/uploads/imgs/20200707/a9e33641c3a75e6828440c74cbd820c6.png'; //同一脸，大，不笑
//非同一脸
$c = 'http://xcx.wqzydh.cn/uploads/imgs/20200707/f252f252ec4cd7c59c1a9b7d502391de.jpg';
//表情包
$f = 'http://xcx.wqzydh.cn/uploads/imgs/20190628/e6ad5e295f849cdb9a8439f609ae6896.jpg';
$requsetArr = [
'UrlA'=>$a,
'UrlB'=>$b,
];
return $requsetArr;
}
/**
* step 2: build string to sign
* 拼接待签名字符串
*/
private function setSplitSign()
{
$date = gmdate("Y-m-d", $this->timestamp);
$this->credentialScope = $date."/".$this->server."/tc3_request";
$hashedCanonicalRequest = hash("SHA256", $this->canonicalRequest);
$stringToSign = $this->algorithm."\n"
.$this->timestamp."\n"
.$this->credentialScope."\n"
.$hashedCanonicalRequest;
$this->stringToSign = $stringToSign;
}
/**
* step 3: sign string
* 计算签名
*/
private function setSign()
{
$secretDate = hash_hmac("SHA256", gmdate("Y-m-d", $this->timestamp), "TC3".$this->secretKey, true);
$secretService = hash_hmac("SHA256", $this->server, $secretDate, true);
$secretSigning = hash_hmac("SHA256", "tc3_request", $secretService, true);
$signature = hash_hmac("SHA256", $this->stringToSign, $secretSigning);
$this->signature = $signature;
}
/**
* step 4: build authorization
* 拼接 Authorization
*/
private function setAuthorization()
{
$authorization = $this->algorithm
." Credential=".$this->secretId."/".$this->credentialScope
.", SignedHeaders=".$this->signedHeaders
.", Signature=".$this->signature;
$this->authorization = $authorization;
}
/**
* step 5: curl request
* curl 请求
*/
private function curlRequest()
{
$sortHeader = $this->sortHeader();
$header = $this->curlNeedHeader( $sortHeader );
return json_decode(httpPost($this->requestDomain,json_encode($this->setHashedRequestPayload()),$header,true),true);
}
//把Authorization插入到数组头部
private function sortHeader()
{
$sortArr['Authorization'] = $this->authorization;
foreach($this->header as $k7=>$v7){
$sortArr[$k7]=$v7;
}
return $sortArr;
}
/**
* 组装curl 需要的header头
*/
private function curlNeedHeader($array = [])
{
$rel = [];
foreach($array as $k=>$v){
$rel[] = $k.':'.$v;
}
return $rel;
}
}补充方法
/**
* curl发出Post请求
* @param string $url
* @param json $data
* @param array $headers
* @return
*/
function httpPost( $url, $data,$headers ) {
$ch = curl_init();
curl_setopt( $ch, CURLOPT_URL, $url );
curl_setopt( $ch, CURLOPT_CUSTOMREQUEST, "POST" );
curl_setopt( $ch, CURLOPT_SSL_VERIFYPEER, FALSE );
curl_setopt( $ch, CURLOPT_SSL_VERIFYHOST, FALSE );
curl_setopt( $ch, CURLOPT_USERAGENT, "Mozilla/5.0 (compatible; MSIE 5.01; Windows NT 5.0)" );
curl_setopt( $ch, CURLOPT_FOLLOWLOCATION, 1 );
curl_setopt( $ch, CURLOPT_AUTOREFERER, 1 );
curl_setopt( $ch, CURLOPT_POSTFIELDS, $data );
curl_setopt( $ch, CURLOPT_RETURNTRANSFER, true );
curl_setopt($ch, CURLOPT_HTTPHEADER, $headers);
$tmpInfo = curl_exec( $ch );
if ( curl_errno( $ch ) ) {return curl_error( $ch );}
curl_close( $ch );
return $tmpInfo;
}
/**
* 传递数据以易于阅读的样式格式化后输出
* @param array data|需要打印的数据
* @return str str|格式化后的数据
* ***/
function p($data){
// 定义样式
$str='<pre style="display: block;padding: 9.5px;margin: 44px 0 0 0;font-size: 13px;line-height: 1.42857;color: #333;word-break: break-all;word-wrap: break-word;background-color: #F5F5F5;border: 1px solid #CCC;border-radius: 4px;">';
// 如果是boolean或者null直接显示文字；否则print
if (is_bool($data)) {
$show_data=$data ? 'true' : 'false';
}elseif (is_null($data)) {
$show_data='null';
}else{
$show_data=print_r($data,true);
}
$str.=$show_data;
$str.='</pre>';
echo $str;
}结果