FastDFS+Nginx之FastDFSClient的使用

上一篇 《Linux之安装FastDFS并整合Nginx》安装并配置好FastDFS+Nginx后，现在介绍下FastDFS的客户端使用。

服务端：确认FastDFS+Nginx的环境处于可上传可访问状态

1、启动tracker服务

/usr/bin/fdfs_trackerd /etc/fdfs/tracker.conf 

2、启动storage服务

/usr/bin/fdfs_storaged /etc/fdfs/storage.conf

3、启动nginx服务

/usr/local/nginx/sbin/nginx

4、服务器内上传图片

 cd /etc/fdfs
 /usr/bin/fdfs_test /etc/fdfs/client.conf upload anti-steal.jpg

查看信息，出现图片路径等信息则OK

5、测试是否可通过nginx访问图片
复制上一步上传的图片路径，在浏览器访问

访问得到则环境可用，进行下一部分。

---

客户端：

Maven项目在pom.xml引入以下依赖：

<dependency>
    <groupId>net.oschina.zcx7878groupId>
    <artifactId>fastdfs-client-javaartifactId>
    <version>1.27.0.0version>
dependency>

配置文件client.conf：

tracker_server = 192.168.41.132:22122

测试代码：

public class FastdfsTest {

    @Test
    public void testUpload() throws Exception {
        // 1.将FastDFS提供的jar包导入
        // 2.初始化全局变量。加载配置文件
        ClientGlobal.init("C:\\eclipse-workspace\\taotao-manager\\taotao-manager-web\\src\\main\\resources\\properties\\client.conf");
        // 3.创建一个TrackerClient对象
        TrackerClient trackerClient = new TrackerClient();
        // 4.创建一个TrackerServer对象
        TrackerServer trackerServer = trackerClient.getConnection();
        // 5.声明一个StorageServer
        StorageServer storageServer = null;
        // 6.获得StorageClient对象
        StorageClient storageClient = new StorageClient(trackerServer, storageServer);
        // 7.通过StorageClient对象方法上传
        String[] strings = storageClient.upload_file("C:\\Users\\WWW\\Pictures\\Camera Roll\\1.jpg", "jpg", null);
        // 8.获得返回信息
        for (String string : strings) {
            System.out.println(string);
        }
    }
}

FastDFSClient工具类

public class FastDFSClient {

        private TrackerClient trackerClient = null;
        private TrackerServer trackerServer = null;
        private StorageServer storageServer = null;
        private StorageClient1 storageClient = null;

        // 这里需要传入配置文件路径，比如"classpath:properties/client.conf"
        // 文件内容为"tracker_server = 192.168.41.132:22122"
        public FastDFSClient(String conf) throws Exception {
            if (conf.contains("classpath:")) {
                conf = conf.replace("classpath:", this.getClass().getResource("/").getPath());
            }
            ClientGlobal.init(conf);
            trackerClient = new TrackerClient();
            trackerServer = trackerClient.getConnection();
            storageServer = null;
            storageClient = new StorageClient1(trackerServer, storageServer);
        }

        /**
        * 上传文件方法
        * 
Title: uploadFile
        * 
Description: 
        * @param fileName 文件全路径
        * @param extName 文件扩展名，不包含（.）
        * @param metas 文件扩展信息
        * @return
        * @throws Exception
        */
        public String uploadFile(String fileName, String extName, NameValuePair[] metas) throws Exception {
            String result = storageClient.upload_file1(fileName, extName, metas);
            return result;
        }

        public String uploadFile(String fileName) throws Exception {
            return uploadFile(fileName, null, null);
        }

        public String uploadFile(String fileName, String extName) throws Exception {
            return uploadFile(fileName, extName, null);
        }

        /**
        * 上传文件方法
        * 
Title: uploadFile
        * 
Description: 
        * @param fileContent 文件的内容，字节数组
        * @param extName 文件扩展名
        * @param metas 文件扩展信息
        * @return
        * @throws Exception
        */
        public String uploadFile(byte[] fileContent, String extName, NameValuePair[] metas) throws Exception {
            String result = storageClient.upload_file1(fileContent, extName, metas);
            return result;
        }

        public String uploadFile(byte[] fileContent) throws Exception {
            return uploadFile(fileContent, null, null);
        }

        public String uploadFile(byte[] fileContent, String extName) throws Exception {
        return uploadFile(fileContent, extName, null);
    }
}

项目中的使用

@Service
public class PictureServiceImpl implements PictureService {

    @Value("${IMAGE_SERVER_BASE_URL}")
    private String IMAGE_SERVER_BASE_URL;

    @Override
    public PictureResult uploadPic(MultipartFile picFile) {

        PictureResult result = new PictureResult();
        // 判断图片是否为空
        if(picFile == null) {
            result.setError(1);
            result.setMessage("图片为空");
            return result;
        }
        // 上传到图片服务器
        try {
            // 取图片扩展名
            String originalFilename = picFile.getOriginalFilename();
            String extName = originalFilename.substring(originalFilename.lastIndexOf(".")+1);

            FastDFSClient client = new FastDFSClient("classpath:properties/client.conf");
            String url = client.uploadFile(picFile.getBytes(), extName);
            // 拼接图片服务器完整图片地址
            url = IMAGE_SERVER_BASE_URL + url;

            result.setError(0);
            result.setUrl(url);
        } catch (Exception e) {
            e.printStackTrace();
            result.setError(1);
            result.setMessage("图片上传失败");
        }
        return result;
    }
}

问题

1、客户端上传图片失败

java.net.SocketTimeoutException: connect timed out
    at java.net.DualStackPlainSocketImpl.waitForConnect(Native Method)
    at java.net.DualStackPlainSocketImpl.socketConnect(DualStackPlainSocketImpl.java:85)
    at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:350)
    at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:206)
    at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:188)
    at java.net.PlainSocketImpl.connect(PlainSocketImpl.java:172)
    at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)
    at java.net.Socket.connect(Socket.java:589)
    at org.csource.fastdfs.ClientGlobal.getSocket(ClientGlobal.java:208)
    at org.csource.fastdfs.StorageServer.(StorageServer.java:43)
    at org.csource.fastdfs.TrackerClient.getStoreStorage(TrackerClient.java:144)
    ...

解决：防火墙开放22122、23000端口

/sbin/iptables -I INPUT -p tcp --dport 22122 -j ACCEPT
/sbin/iptables -I INPUT -p tcp --dport 23000 -j ACCEPT
/etc/rc.d/init.d/iptables save