七牛云鉴黄实现

傷城~ 2022-06-14 09:52 277阅读 0赞

项目中把大部分的图片放在第三方存储–七牛云。今天要解决一个鉴黄的功能。  
流程是如下图：

![这里写图片描述][SouthEast]

怎么鉴黄？看七牛云的文档：[https://portal.qiniu.com/dora/thirdparty/create/image\_porn/quickstart][https_portal.qiniu.com_dora_thirdparty_create_image_porn_quickstart]  
1.在控制台首页右边的下方的众多第三方鉴黄选择一个，这里以网易易盾为例。

![这里写图片描述][SouthEast 1]

2.选择后点击“开始使用”，账户要充几块钱才能使用。

![这里写图片描述][SouthEast 2]

3.写代码实现  
原理很简单，在图片url后面加上”?image\_porn”访问七牛云，根据返回的数据判断是否合法。这里才用HttpClient4.5.2实现  
<1>引进相应的jar包

<dependency>
        <groupId>org.apache.httpcomponents</groupId>
        <artifactId>httpclient</artifactId>
        <version>4.5.2</version>
       </dependency>

<2>编写一个httpclient 工具类，在apache官网copy的，直接用

package com.xforce.pano.util;
    
    import java.io.BufferedReader;
    import java.io.IOException;
    import java.io.InputStream;
    import java.io.InputStreamReader;
    import net.sf.json.JSONArray;
    import net.sf.json.JSONObject;
    import org.apache.http.HttpEntity;
    import org.apache.http.client.methods.CloseableHttpResponse;
    import org.apache.http.client.methods.HttpGet;
    import org.apache.http.impl.client.CloseableHttpClient;
    import org.apache.http.impl.client.HttpClients;
    import org.apache.http.util.EntityUtils;
    
    public class HttpClientHelper {
    
        public boolean checkUpload (String url) throws Exception {
            Boolean yellow = true;
            CloseableHttpClient httpclient = HttpClients.createDefault();
            try {
                HttpGet httpGet = new HttpGet(url);
                CloseableHttpResponse response = httpclient.execute(httpGet);
                // The underlying HTTP connection is still held by the response object
                // to allow the response content to be streamed directly from the network socket.
                // In order to ensure correct deallocation of system resources
                // the user MUST call CloseableHttpResponse#close() from a finally clause.
                // Please note that if response content is not fully consumed the underlying
                // connection cannot be safely re-used and will be shut down and discarded
                // by the connection manager.
                try {
                    HttpEntity entity = response.getEntity();
                    // do something useful with the response body
                    // and ensure it is fully consumed
                    //用io流接收返回的内容，再将io流转为string再转为json对象解析
                    InputStream ins = entity.getContent();
                    //解析具体过程看第三方接口返回的数据而定
                    JSONObject json = JSONObject.fromObject(StreamToString(ins));
                    JSONArray resultArray = JSONArray.fromObject(json.get("result"));
                    JSONObject resultObject = JSONObject.fromObject(resultArray.get(0));
                    JSONArray labelsArray = JSONArray.fromObject(resultObject.get("labels"));
                    //根据第三方提供的接口，labels为空说明图片是合法的，否则不合法
                    if(labelsArray.size() > 0) {
                        yellow = false;
                    }
                    EntityUtils.consume(entity);
                } finally {
                    response.close();
                }
            } finally {
                httpclient.close();
            }
            return yellow;
        }
    
        //io流转string
        private String StreamToString(InputStream is) {
            BufferedReader reader = new BufferedReader(new InputStreamReader(is), 16*1024); 
            StringBuilder sb = new StringBuilder();
            String line = null;
            try {
                while ((line = reader.readLine()) != null) {
                    sb.append(line + "\n"); 
                }
            } catch (IOException e) {
                e.printStackTrace();
            } finally {
                try {
                    is.close();
                } catch (IOException e) {
                    e.printStackTrace();
                }
            }
            return sb.toString();
        }
    
    }

<3>具体的应用在controller里面

...
       try {
                if(!(httpClientHelper.checkUpload(url + "?image_porn"))) {
                    ...
                }
            } catch (Exception e) {
                e.printStackTrace();
            }
    ...

**最后就愉快的测试吧，找些不合法的资源测试鉴黄效果！**

[SouthEast]: /images/20220614/1745e0a3e73e408bb41389d1fe5d3111.png
[https_portal.qiniu.com_dora_thirdparty_create_image_porn_quickstart]: https://portal.qiniu.com/dora/thirdparty/create/image_porn/quickstart
[SouthEast 1]: /images/20220614/1a38eaaa97a741cdbaeebddc10306993.png
[SouthEast 2]: /images/20220614/24baf8c3036c47e58372ed455d494804.png