PC端操作阿里云人脸识别(vue+php)

html参考：

1.需要引入 tracking.js 第三方库

2.检测到人脸自动 stop

3.canvas 压缩图片体积   正在上传中...........  

<video id="video" preload autoplay loop muted></video>
<canvas id="canvas" width="500" height="500"  style="position:absolute;top:0;left:0;"></canvas>

export default {
    name: 'componentName',
    data() {
        return {
            videoEle: null,
            trackerTask:null,
            first:null
        } 
    },
    created(){
        this.openCamera();
    },
    mounted(){
    },
    methods: {
        openCamera () {
 
          var video = document.getElementById('video');
          var canvas = document.getElementById('canvas');
          var context = canvas.getContext('2d');
 
          var tracker = new tracking.ObjectTracker('face');  // 引入第三方 库
          tracker.setInitialScale(1);          
          tracker.setStepSize(2);
          tracker.setEdgesDensity(0.1);
 
          this.trackerTask = tracking.track('#video', tracker, { camera: true });
          //-------  指定 canvas 的宽高 ，auto 自动播放
          let constraints = {
                video: { 500, height: 500},
                audio: true
            };
 
          let promise = navigator.mediaDevices.getUserMedia(constraints);   // h5 新的API
             
            promise.then(function (MediaStream) {
                video.srcObject = MediaStream;
                video.play();
            }).catch(function (PermissionDeniedError) {
                console.log(PermissionDeniedError);
            })
            //--------------
            let that = this;
            that.tracker_fun(tracker,video,context,canvas); //open 摄像头，执行tracker_fun( 传入参数 )
 
      },
      tracker_fun(tracker,video,context,canvas){
        let that = this;
        let set_clear;
        set_clear = setTimeout(function(){ // 每秒 检测人脸 结果
              tracker.on('track', function(event) {     // 视频流
                // context.clearRect(0, 0, canvas.width, canvas.height);
              if(!that.first){     // if  --- > else  检测到人脸 success() =>{}
              event.data.forEach(function(rect) {
                if(rect.x){
                  that.first = rect.x;
                  video.pause();    // success  将暂停 video
                  console.log(rect)
                  console.log(video)
                  context.drawImage(video, 0, 0, 500, 500);   // 绘制到 canvas
                  context.font = '11px Helvetica';
                  context.fillText("",100,40);
                  context.strokeStyle = '#a64ceb';
                  context.strokeRect(rect.x, rect.y, rect.width, rect.height);
                  var data_url = canvas.toDataURL('image/png'); //base64 request
                  console.log(data_url)
 
                  // video.load();
                  // that.first = null;
                  // that.tracker_fun(tracker,video,context,canvas)
                  return;
                }
              });
              }
            });
              clearTimeout(set_clear)
              console.log('-------')
        },5000)
         
      }
    },
    mounted() {
 
    },
    destroyed() {
        // 停止侦测
        this.trackerTask.stop()
        // 关闭摄像头
        window.tracking.closeCamera()
    }   
}

PHP操作阿里云介绍

1、composer.json环境依赖

{
    "require": {
      "guzzlehttp/guzzle": "~6.0"
   }
}

2、使用网络图片

<?php

use GuzzleHttp\Psr7\Request;
use GuzzleHttp\Client;
require_once 'vendor\autoload.php';

// 参数设置
$akId = "********";
$akSecret = "********";
$body1 = '{"type":"0","image_url":"https://ss0.bdstatic.com/94oJfD_bAAcT8t7mm9GUKT-xh_/timg?image&quality=100&size=b4000_4000&sec=1553926699&di=3e4484731c8897c57e67b3f632801f9a&src=http://b-ssl.duitang.com/uploads/item/201603/28/20160328121906_ErzAB.jpeg"}';
$url = "https://dtplus-cn-shanghai.data.aliyuncs.com/face/attribute";

$date1 = gmdate("D, d M Y H:i:s \G\M\T");
// 参数构造
$options = array(
    'http' => array(
        'header' => array(
            'accept'=> "application/json",
            'content-type'=> "application/json",
            'date'=> $date1,
            'authorization' => ''
        ),
        'method' => "POST", //可以是 GET, POST, DELETE, PUT
        'content' => $body1
//         'content' => json_encode($body1)
    )
);

$http = $options['http'];
$header = $http['header'];
$urlObj = parse_url($url);
if(empty($urlObj["query"]))
    $path = $urlObj["path"];
    else
        $path = $urlObj["path"]."?".$urlObj["query"];
        $body = $http['content'];
        if(empty($body))
            $bodymd5 = $body;
            else
                $bodymd5 = base64_encode(md5($body,true));
                $stringToSign = $http['method']."\n".$header['accept']."\n".$bodymd5."\n".$header['content-type']."\n".$header['date']."\n".$path;
                $signature = base64_encode(
                    hash_hmac(
                        "sha1",
                        $stringToSign,
                        $akSecret, true));

$authHeader = "Dataplus "."$akId".":"."$signature";
$options['http']['header']['authorization'] = $authHeader;
 
#  构造Rest API Client请求
$client = new Client();
$headers = ['Content-type' => 'application/json', 'Accept' => 'application/json', 'Authorization' => $options['http']['header']['authorization'], 'Date' => $date1];

$request = new Request('POST','https://dtplus-cn-shanghai.data.aliyuncs.com/face/attribute',$headers,$body1);

$response = $client->send($request);
echo $response->getBody();

?>

3、使用本地图片

<?php

use GuzzleHttp\Psr7\Request;
use GuzzleHttp\Client;
require_once 'vendor\autoload.php';

// 参数设置
$akId = "********";
$akSecret = "********";

# 读取本地图片
$image_file = 'C:\Users\Administrator\Desktop\time.jpeg';
$image_info = getimagesize($image_file);
$base64_image_content = "data:{$image_info['mime']};base64," . chunk_split(base64_encode(file_get_contents($image_file)));

function trimall($str)//删除所有的空格
{
    $qian=array(" ","　","\t","\n","\r");
    $hou=array("","","","","");
    return str_replace($qian,$hou,$str);
}

$base64_image_content = substr($base64_image_content, 23);

$base64_image_content = trimall($base64_image_content);

// echo $base64_image_content;

$body1 = '{"type":"1","content":"'.$base64_image_content.'"}';

$url = "https://dtplus-cn-shanghai.data.aliyuncs.com/face/attribute";

$date1 = gmdate("D, d M Y H:i:s \G\M\T");
// 参数构造
$options = array(
    'http' => array(
        'header' => array(
            'accept'=> "application/json",
            'content-type'=> "application/json",
            'date'=> $date1,
            'authorization' => ''
        ),
        'method' => "POST", //可以是 GET, POST, DELETE, PUT
        'content' => $body1
    )
);

$http = $options['http'];
$header = $http['header'];
$urlObj = parse_url($url);
if(empty($urlObj["query"]))
    $path = $urlObj["path"];
    else
        $path = $urlObj["path"]."?".$urlObj["query"];
        $body = $http['content'];
        if(empty($body))
            $bodymd5 = $body;
            else
                $bodymd5 = base64_encode(md5($body,true));
                $stringToSign = $http['method']."\n".$header['accept']."\n".$bodymd5."\n".$header['content-type']."\n".$header['date']."\n".$path;
                $signature = base64_encode(
                    hash_hmac(
                        "sha1",
                        $stringToSign,
                        $akSecret, true));

$authHeader = "Dataplus "."$akId".":"."$signature";
$options['http']['header']['authorization'] = $authHeader;

#  构造Rest API Client请求
$client = new Client();
$headers = ['Content-type' => 'application/json', 'Accept' => 'application/json', 'Authorization' => $options['http']['header']['authorization'], 'Date' => $date1];
$request = new Request('POST','https://dtplus-cn-shanghai.data.aliyuncs.com/face/attribute',$headers,$body);

$response = $client->send($request);
echo $response->getBody();
?>

SSL错误处理

问题描述

在使用 PHP 的 http 客户端工具（如 Guzzle）调用认知服务时出现证书认证问题，错误信息如下：

Fatal error: Uncaught exception 'GuzzleHttp\Exception\RequestException' with message 'cURL error 60: SSL certificate problem: unable to get local issuer certificate

解决方法

该问题的出现是由于没有配置信任的服务器 HTTPS 验证。默认 cURL 是被设为不信任任何 CAs 的，因此这就是无法访问相关服务器的原因。解决该问题的最好方法是指定一组默认受信任的 CAs。

• CA 证书

  数字证书认证机构（Certificate Authority， 缩写为 CA），是负责发放和管理数字证书的权威机构，它要制定政策和具体步骤来验证、识别用户身份，并对用户证书进行签名，以确保证书持有者的身份和公钥的拥有权。证书通常包括所有者的公钥、 证书的到期时间、所有者的名称和其他关于所有者的信息。

所以可以通过下载证书的方式解决该问题，具体操作方法如下：

1. 下载证书保存到本地，下载地址：https://curl.haxx.se/ca/cacert.pem
2. 配置 php.ini 文件：curl.cainfo =<filepath>/cacert.pem
3. 重启 Apache 服务器，问题即可解决。