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package cn.hutool.extra.ftp;

import cn.hutool.core.collection.ListUtil;
import cn.hutool.core.io.FileUtil;
import cn.hutool.core.io.IORuntimeException;
import cn.hutool.core.lang.Assert;
import cn.hutool.core.lang.Filter;
import cn.hutool.core.util.ArrayUtil;
import cn.hutool.core.util.CharsetUtil;
import cn.hutool.core.util.StrUtil;
import org.apache.commons.net.ftp.FTPClient;
import org.apache.commons.net.ftp.FTPClientConfig;
import org.apache.commons.net.ftp.FTPFile;
import org.apache.commons.net.ftp.FTPReply;

import java.io.File;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.nio.charset.Charset;
import java.nio.charset.StandardCharsets;
import java.util.ArrayList;
import java.util.List;

/**
 * FTP客户端封装
* 此客户端基于Apache-Commons-Net *

* 常见搭建ftp的工具有 * 1、filezila server ;根目录一般都是空 * 2、linux vsftpd ; 使用的 系统用户的目录,这里往往都是不是根目录,如:/home/ftpuser/ftp * * @author looly, xhzou * @since 4.1.8 */ public class Ftp extends AbstractFtp { /** * 默认端口 */ public static final int DEFAULT_PORT = 21; private FTPClient client; private FtpMode mode; /** * 执行完操作是否返回当前目录 */ private boolean backToPwd; /** * 构造,匿名登录 * * @param host 域名或IP */ public Ftp(String host) { this(host, DEFAULT_PORT); } /** * 构造,匿名登录 * * @param host 域名或IP * @param port 端口 */ public Ftp(String host, int port) { this(host, port, "anonymous", ""); } /** * 构造 * * @param host 域名或IP * @param port 端口 * @param user 用户名 * @param password 密码 */ public Ftp(String host, int port, String user, String password) { this(host, port, user, password, CharsetUtil.CHARSET_UTF_8); } /** * 构造 * * @param host 域名或IP * @param port 端口 * @param user 用户名 * @param password 密码 * @param charset 编码 */ public Ftp(String host, int port, String user, String password, Charset charset) { this(host, port, user, password, charset, null, null); } /** * 构造 * * @param host 域名或IP * @param port 端口 * @param user 用户名 * @param password 密码 * @param charset 编码 * @param serverLanguageCode 服务器语言 例如:zh * @param systemKey 服务器标识 例如:org.apache.commons.net.ftp.FTPClientConfig.SYST_NT */ public Ftp(String host, int port, String user, String password, Charset charset, String serverLanguageCode, String systemKey) { this(host, port, user, password, charset, serverLanguageCode, systemKey, null); } /** * 构造 * * @param host 域名或IP * @param port 端口 * @param user 用户名 * @param password 密码 * @param charset 编码 * @param serverLanguageCode 服务器语言 * @param systemKey 系统关键字 * @param mode 模式 */ public Ftp(String host, int port, String user, String password, Charset charset, String serverLanguageCode, String systemKey, FtpMode mode) { this(new FtpConfig(host, port, user, password, charset, serverLanguageCode, systemKey), mode); } /** * 构造 * * @param config FTP配置 * @param mode 模式 */ public Ftp(FtpConfig config, FtpMode mode) { super(config); this.mode = mode; this.init(); } /** * 构造 * * @param client 自定义实例化好的{@link FTPClient} * @since 5.7.22 */ public Ftp(FTPClient client) { super(FtpConfig.create()); this.client = client; } /** * 初始化连接 * * @return this */ public Ftp init() { return this.init(this.ftpConfig, this.mode); } /** * 初始化连接 * * @param host 域名或IP * @param port 端口 * @param user 用户名 * @param password 密码 * @return this */ public Ftp init(String host, int port, String user, String password) { return this.init(host, port, user, password, null); } /** * 初始化连接 * * @param host 域名或IP * @param port 端口 * @param user 用户名 * @param password 密码 * @param mode 模式 * @return this */ public Ftp init(String host, int port, String user, String password, FtpMode mode) { return init(new FtpConfig(host, port, user, password, this.ftpConfig.getCharset(), null, null), mode); } /** * 初始化连接 * * @param config FTP配置 * @param mode 模式 * @return this */ public Ftp init(FtpConfig config, FtpMode mode) { final FTPClient client = new FTPClient(); // issue#I3O81Y@Gitee client.setRemoteVerificationEnabled(false); final Charset charset = config.getCharset(); if (null != charset) { client.setControlEncoding(charset.toString()); } client.setConnectTimeout((int) config.getConnectionTimeout()); final String systemKey = config.getSystemKey(); if (StrUtil.isNotBlank(systemKey)) { final FTPClientConfig conf = new FTPClientConfig(systemKey); final String serverLanguageCode = config.getServerLanguageCode(); if (StrUtil.isNotBlank(serverLanguageCode)) { conf.setServerLanguageCode(config.getServerLanguageCode()); } client.configure(conf); } // connect try { // 连接ftp服务器 client.connect(config.getHost(), config.getPort()); client.setSoTimeout((int) config.getSoTimeout()); // 登录ftp服务器 client.login(config.getUser(), config.getPassword()); } catch (IOException e) { throw new IORuntimeException(e); } final int replyCode = client.getReplyCode(); // 是否成功登录服务器 if (false == FTPReply.isPositiveCompletion(replyCode)) { try { client.disconnect(); } catch (IOException e) { // ignore } throw new FtpException("Login failed for user [{}], reply code is: [{}]", config.getUser(), replyCode); } this.client = client; if (mode != null) { setMode(mode); } return this; } /** * 设置FTP连接模式,可选主动和被动模式 * * @param mode 模式枚举 * @return this * @since 4.1.19 */ public Ftp setMode(FtpMode mode) { this.mode = mode; switch (mode) { case Active: this.client.enterLocalActiveMode(); break; case Passive: this.client.enterLocalPassiveMode(); break; } return this; } /** * 设置执行完操作是否返回当前目录 * * @param backToPwd 执行完操作是否返回当前目录 * @return this * @since 4.6.0 */ public Ftp setBackToPwd(boolean backToPwd) { this.backToPwd = backToPwd; return this; } /** * 是否执行完操作返回当前目录 * @return 执行完操作是否返回当前目录 * @since 5.7.17 */ public boolean isBackToPwd(){ return this.backToPwd; } /** * 如果连接超时的话,重新进行连接 经测试,当连接超时时,client.isConnected()仍然返回ture,无法判断是否连接超时 因此,通过发送pwd命令的方式,检查连接是否超时 * * @return this */ @Override public Ftp reconnectIfTimeout() { String pwd = null; try { pwd = pwd(); } catch (IORuntimeException fex) { // ignore } if (pwd == null) { return this.init(); } return this; } /** * 改变目录 * * @param directory 目录 * @return 是否成功 */ @Override synchronized public boolean cd(String directory) { if (StrUtil.isBlank(directory)) { // 当前目录 return true; } try { return client.changeWorkingDirectory(directory); } catch (IOException e) { throw new IORuntimeException(e); } } /** * 远程当前目录 * * @return 远程当前目录 * @since 4.1.14 */ @Override public String pwd() { try { return client.printWorkingDirectory(); } catch (IOException e) { throw new IORuntimeException(e); } } @Override public List ls(String path) { return ArrayUtil.map(lsFiles(path), FTPFile::getName); } /** * 遍历某个目录下所有文件和目录,不会递归遍历
* 此方法自动过滤"."和".."两种目录 * * @param path 目录 * @param filter 过滤器,null表示不过滤,默认去掉"."和".."两种目录 * @return 文件或目录列表 * @since 5.3.5 */ public List lsFiles(String path, Filter filter) { final FTPFile[] ftpFiles = lsFiles(path); if (ArrayUtil.isEmpty(ftpFiles)) { return ListUtil.empty(); } final List result = new ArrayList<>(ftpFiles.length - 2 <= 0 ? ftpFiles.length : ftpFiles.length - 2); String fileName; for (FTPFile ftpFile : ftpFiles) { fileName = ftpFile.getName(); if (false == StrUtil.equals(".", fileName) && false == StrUtil.equals("..", fileName)) { if (null == filter || filter.accept(ftpFile)) { result.add(ftpFile); } } } return result; } /** * 遍历某个目录下所有文件和目录,不会递归遍历 * * @param path 目录,如果目录不存在,抛出异常 * @return 文件或目录列表 * @throws FtpException 路径不存在 * @throws IORuntimeException IO异常 */ public FTPFile[] lsFiles(String path) throws FtpException, IORuntimeException { String pwd = null; if (StrUtil.isNotBlank(path)) { pwd = pwd(); if (false == cd(path)) { throw new FtpException("Change dir to [{}] error, maybe path not exist!", path); } } FTPFile[] ftpFiles; try { ftpFiles = this.client.listFiles(); } catch (IOException e) { throw new IORuntimeException(e); } finally { // 回到原目录 cd(pwd); } return ftpFiles; } @Override public boolean mkdir(String dir) throws IORuntimeException { try { return this.client.makeDirectory(dir); } catch (IOException e) { throw new IORuntimeException(e); } } /** * 获取服务端目录状态。 * * @param path 路径 * @return 状态int,服务端不同,返回不同 * @since 5.4.3 */ public int stat(String path) throws IORuntimeException { try { return this.client.stat(path); } catch (IOException e) { throw new IORuntimeException(e); } } /** * 判断ftp服务器目录内是否还有子元素(目录或文件) * * @param path 文件路径 * @return 是否存在 * @throws IORuntimeException IO异常 */ public boolean existFile(String path) throws IORuntimeException { FTPFile[] ftpFileArr; try { ftpFileArr = client.listFiles(path); } catch (IOException e) { throw new IORuntimeException(e); } return ArrayUtil.isNotEmpty(ftpFileArr); } @Override public boolean delFile(String path) throws IORuntimeException { final String pwd = pwd(); final String fileName = FileUtil.getName(path); final String dir = StrUtil.removeSuffix(path, fileName); if (false == cd(dir)) { throw new FtpException("Change dir to [{}] error, maybe dir not exist!", path); } boolean isSuccess; try { isSuccess = client.deleteFile(fileName); } catch (IOException e) { throw new IORuntimeException(e); } finally { // 回到原目录 cd(pwd); } return isSuccess; } @Override public boolean delDir(String dirPath) throws IORuntimeException { FTPFile[] dirs; try { dirs = client.listFiles(dirPath); } catch (IOException e) { throw new IORuntimeException(e); } String name; String childPath; for (FTPFile ftpFile : dirs) { name = ftpFile.getName(); childPath = StrUtil.format("{}/{}", dirPath, name); if (ftpFile.isDirectory()) { // 上级和本级目录除外 if (false == ".".equals(name) && false == "..".equals(name)) { delDir(childPath); } } else { delFile(childPath); } } // 删除空目录 try { return this.client.removeDirectory(dirPath); } catch (IOException e) { throw new IORuntimeException(e); } } /** * 上传文件到指定目录,可选: * *

	 * 1. destPath为null或""上传到当前路径
	 * 2. destPath为相对路径则相对于当前路径的子路径
	 * 3. destPath为绝对路径则上传到此路径
	 * 
* * @param destPath 服务端路径,可以为{@code null} 或者相对路径或绝对路径 * @param file 文件 * @return 是否上传成功 */ @Override public boolean upload(String destPath, File file) { Assert.notNull(file, "file to upload is null !"); return upload(destPath, file.getName(), file); } /** * 上传文件到指定目录,可选: * *
	 * 1. destPath为null或""上传到当前路径
	 * 2. destPath为相对路径则相对于当前路径的子路径
	 * 3. destPath为绝对路径则上传到此路径
	 * 
* * @param file 文件 * @param destPath 服务端路径,可以为{@code null} 或者相对路径或绝对路径 * @param fileName 自定义在服务端保存的文件名 * @return 是否上传成功 * @throws IORuntimeException IO异常 */ public boolean upload(String destPath, String fileName, File file) throws IORuntimeException { try (final InputStream in = FileUtil.getInputStream(file)) { return upload(destPath, fileName, in); } catch (final IOException e) { throw new IORuntimeException(e); } } /** * 上传文件到指定目录,可选: * *
	 * 1. destPath为null或""上传到当前路径
	 * 2. destPath为相对路径则相对于当前路径的子路径
	 * 3. destPath为绝对路径则上传到此路径
	 * 
* * @param destPath 服务端路径,可以为{@code null} 或者相对路径或绝对路径 * @param fileName 文件名 * @param fileStream 文件流 * @return 是否上传成功 * @throws IORuntimeException IO异常 */ public boolean upload(String destPath, String fileName, InputStream fileStream) throws IORuntimeException { try { client.setFileType(FTPClient.BINARY_FILE_TYPE); } catch (final IOException e) { throw new IORuntimeException(e); } String pwd = null; if (this.backToPwd) { pwd = pwd(); } if (StrUtil.isNotBlank(destPath)) { mkDirs(destPath); if (false == cd(destPath)) { throw new FtpException("Change dir to [{}] error, maybe dir not exist!", destPath); } } try { return client.storeFile(fileName, fileStream); } catch (IOException e) { throw new IORuntimeException(e); } finally { if (this.backToPwd) { cd(pwd); } } } /** * 递归上传文件(支持目录)
* 上传时,如果uploadFile为目录,只复制目录下所有目录和文件到目标路径下,并不会复制目录本身
* 上传时,自动创建父级目录 * * @param remotePath 目录路径 * @param uploadFile 上传文件或目录 */ public void uploadFileOrDirectory(final String remotePath, final File uploadFile) { if (false == FileUtil.isDirectory(uploadFile)) { // 上传文件 this.upload(remotePath, uploadFile); return; } final File[] files = uploadFile.listFiles(); if (ArrayUtil.isEmpty(files)) { return; } final List dirs = new ArrayList<>(files.length); //第一次只处理文件,防止目录在前面导致先处理子目录,而引发文件所在目录不正确 for (final File f : files) { if (f.isDirectory()) { dirs.add(f); } else { this.upload(remotePath, f); } } //第二次只处理目录 for (final File f : dirs) { final String dir = FileUtil.normalize(remotePath + "/" + f.getName()); this.uploadFileOrDirectory(dir, f); } } /** * 下载文件 * * @param path 文件路径,包含文件名 * @param outFile 输出文件或目录,当为目录时,使用服务端的文件名 */ @Override public void download(String path, File outFile) { final String fileName = FileUtil.getName(path); final String dir = StrUtil.removeSuffix(path, fileName); download(dir, fileName, outFile); } /** * 递归下载FTP服务器上文件到本地(文件目录和服务器同步) * * @param sourcePath ftp服务器目录 * @param destDir 本地目录 */ @Override public void recursiveDownloadFolder(String sourcePath, File destDir) { String fileName; String srcFile; File destFile; for (FTPFile ftpFile : lsFiles(sourcePath, null)) { fileName = ftpFile.getName(); srcFile = StrUtil.format("{}/{}", sourcePath, fileName); destFile = FileUtil.file(destDir, fileName); if (false == ftpFile.isDirectory()) { // 本地不存在文件或者ftp上文件有修改则下载 if (false == FileUtil.exist(destFile) || (ftpFile.getTimestamp().getTimeInMillis() > destFile.lastModified())) { download(srcFile, destFile); } } else { // 服务端依旧是目录,继续递归 FileUtil.mkdir(destFile); recursiveDownloadFolder(srcFile, destFile); } } } /** * 下载文件 * * @param path 文件所在路径(远程目录),不包含文件名 * @param fileName 文件名 * @param outFile 输出文件或目录,当为目录时使用服务端文件名 * @throws IORuntimeException IO异常 */ public void download(String path, String fileName, File outFile) throws IORuntimeException { if (outFile.isDirectory()) { outFile = new File(outFile, fileName); } if (false == outFile.exists()) { FileUtil.touch(outFile); } try (OutputStream out = FileUtil.getOutputStream(outFile)) { download(path, fileName, out); } catch (IOException e) { throw new IORuntimeException(e); } } /** * 下载文件到输出流 * * @param path 文件路径 * @param fileName 文件名 * @param out 输出位置 */ public void download(String path, String fileName, OutputStream out) { download(path, fileName, out, null); } /** * 下载文件到输出流 * * @param path 服务端的文件路径 * @param fileName 服务端的文件名 * @param out 输出流,下载的文件写出到这个流中 * @param fileNameCharset 文件名编码,通过此编码转换文件名编码为ISO8859-1 * @throws IORuntimeException IO异常 * @since 5.5.7 */ public void download(String path, String fileName, OutputStream out, Charset fileNameCharset) throws IORuntimeException { String pwd = null; if (this.backToPwd) { pwd = pwd(); } if (false == cd(path)) { throw new FtpException("Change dir to [{}] error, maybe dir not exist!", path); } if (null != fileNameCharset) { fileName = new String(fileName.getBytes(fileNameCharset), StandardCharsets.ISO_8859_1); } try { client.setFileType(FTPClient.BINARY_FILE_TYPE); client.retrieveFile(fileName, out); } catch (IOException e) { throw new IORuntimeException(e); } finally { if (backToPwd) { cd(pwd); } } } /** * 获取FTPClient客户端对象 * * @return {@link FTPClient} */ public FTPClient getClient() { return this.client; } @Override public void close() throws IOException { if (null != this.client) { this.client.logout(); if (this.client.isConnected()) { this.client.disconnect(); } this.client = null; } } }




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