概述

前面分别给出了关于阿里云人脸识别Java调用示例参考、阿里云人脸识别C#调用示例参考、阿里云人脸识别Python3调用示例参考 、阿里云人脸识别PHP调用示例参考。本文主要介绍DodeJS调用阿里云人脸识别服务，参数等的获取参考阿里云人脸识别使用流程简介。

Code Sample

1、使用本地图片

var request = require('request');
var url = require('url');
var crypto = require('crypto');
var date = new Date().toUTCString()
// 这里填写AK和请求
var ak_id = '';
var ak_secret = '';

// 读取本地图片并转base64编码
var fs = require("fs");
var filePath = "time.jpeg";
var imageData = fs.readFileSync(filePath); // 例：fileUrl="D:\test\test.bmp"
var imageBase64 = imageData.toString("base64");

var options = {
url : 'https://dtplus-cn-shanghai.data.aliyuncs.com/face/attribute',
method: 'POST',
body: '{"type": "1", "content":"'+imageBase64+'"}',
headers: {

<span class="hljs-string">'accept'</span>: <span class="hljs-string">'application/json'</span>,
<span class="hljs-string">'content-type'</span>: <span class="hljs-string">'application/json'</span>,
<span class="hljs-string">'date'</span>: date,
<span class="hljs-string">'Authorization'</span>: <span class="hljs-string">''</span>

}
};

md5 = function(buffer) {
var hash;
hash = crypto.createHash('md5');
hash.update(buffer);
return hash.digest('base64');
};
sha1 = function(stringToSign, secret) {
var signature;
return signature = crypto.createHmac('sha1', secret).update(stringToSign).digest().toString('base64');
};
// step1: 组stringToSign [StringToSign = #{method}\n#{accept}\n#{data}\n#{contentType}\n#{date}\n#{action}]
var body = options.body || '';
var bodymd5;
if(body === void 0 || body === ''){
bodymd5 = body;
} else {
bodymd5 = md5(new Buffer(body));
}
console.log(bodymd5)
var stringToSign = options.method + "n" + options.headers.accept + "n" + bodymd5 + "n" + options.headers['content-type'] + "n" + options.headers.date + "n" + url.parse(options.url).path;
console.log("step1-Sign string:", stringToSign);
// step2: 加密 [Signature = Base64( HMAC-SHA1( AccessSecret, UTF-8-Encoding-Of(StringToSign) ) )]
var signature = sha1(stringToSign, ak_secret);
// console.log("step2-signature:", signature);
// step3: 组authorization header [Authorization = Dataplus AccessKeyId + ":" + Signature]
var authHeader = "Dataplus " + ak_id + ":" + signature;
console.log("step3-authorization Header:", authHeader);
options.headers.Authorization = authHeader;
console.log('authHeader', authHeader);
// step4: send request
function callback(error, response, body) {
if (error) {

<span class="hljs-built_in">console</span>.log(<span class="hljs-string">"error"</span>, error)

}
console.log("step4-response body:", response.statusCode, body)
}
request(options, callback);


2、使用网络图片

var request = require('request');
var url = require('url');
var crypto = require('crypto');
var date = new Date().toUTCString()
// 这里填写AK和请求
var ak_id = '';
var ak_secret = '';
var options = {
  url : 'https://dtplus-cn-shanghai.data.aliyuncs.com/face/attribute',
  method: 'POST',
  body: '{"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"}',
  headers: {

<span class="hljs-string">'accept'</span>: <span class="hljs-string">'application/json'</span>,
<span class="hljs-string">'content-type'</span>: <span class="hljs-string">'application/json'</span>,
<span class="hljs-string">'date'</span>: date,
<span class="hljs-string">'Authorization'</span>: <span class="hljs-string">''</span>

}
};

md5 = function(buffer) {
var hash;
hash = crypto.createHash('md5');
hash.update(buffer);
return hash.digest('base64');
};
sha1 = function(stringToSign, secret) {
var signature;
return signature = crypto.createHmac('sha1', secret).update(stringToSign).digest().toString('base64');
};
// step1: 组stringToSign [StringToSign = #{method}\n#{accept}\n#{data}\n#{contentType}\n#{date}\n#{action}]
var body = options.body || '';
var bodymd5;
if(body === void 0 || body === ''){
bodymd5 = body;
} else {
bodymd5 = md5(new Buffer(body));
}
console.log(bodymd5)
var stringToSign = options.method + "n" + options.headers.accept + "n" + bodymd5 + "n" + options.headers['content-type'] + "n" + options.headers.date + "n" + url.parse(options.url).path;
console.log("step1-Sign string:", stringToSign);
// step2: 加密 [Signature = Base64( HMAC-SHA1( AccessSecret, UTF-8-Encoding-Of(StringToSign) ) )]
var signature = sha1(stringToSign, ak_secret);
// console.log("step2-signature:", signature);
// step3: 组authorization header [Authorization = Dataplus AccessKeyId + ":" + Signature]
var authHeader = "Dataplus " + ak_id + ":" + signature;
console.log("step3-authorization Header:", authHeader);
options.headers.Authorization = authHeader;
console.log('authHeader', authHeader);
// step4: send request
function callback(error, response, body) {
if (error) {

<span class="hljs-built_in">console</span>.log(<span class="hljs-string">"error"</span>, error)

}
console.log("step4-response body:", response.statusCode, body)
}
request(options, callback);

测试结果