soc/soc-modules/soc-modules-file/src/main/java/com/xunmei/file/utils/FileUploadUtils.java

package com.xunmei.file.utils;

import cn.hutool.core.codec.Base64;
import cn.hutool.core.io.FileTypeUtil;
import cn.hutool.core.io.FileUtil;
import com.xunmei.common.core.exception.file.FileException;
import com.xunmei.common.core.exception.file.FileNameLengthLimitExceededException;
import com.xunmei.common.core.exception.file.FileSizeLimitExceededException;
import com.xunmei.common.core.exception.file.InvalidExtensionException;
import com.xunmei.common.core.utils.DateUtils;
import com.xunmei.common.core.utils.StringUtils;
import com.xunmei.common.core.utils.file.FileTypeUtils;
import com.xunmei.common.core.utils.file.MimeTypeUtils;
import com.xunmei.common.core.utils.uuid.Seq;
import com.xunmei.file.vo.FileBase64Vo;
import org.apache.commons.io.FileUtils;
import org.apache.commons.lang3.StringEscapeUtils;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.web.multipart.MultipartFile;

import java.io.*;
import java.nio.file.Paths;
import java.util.Objects;

/**
 * 文件上传工具类
 *
 * @author xunmei
 */
public class FileUploadUtils
{

    private static final Logger log = LoggerFactory.getLogger(FileUploadUtils.class);
    /**
     * 默认大小 50M
     */
    public static final long DEFAULT_MAX_SIZE = 50 * 1024 * 1024;

    /**
     * 默认的文件名最大长度 100
     */
    public static final int DEFAULT_FILE_NAME_LENGTH = 100;

    /**
     * 根据文件路径上传
     *
     * @param baseDir 相对应用的基目录
     * @param file 上传的文件
     * @return 文件名称
     * @throws IOException
     */
    public static final String upload(String baseDir, MultipartFile file) throws IOException
    {
        try
        {
            return upload(baseDir, file, MimeTypeUtils.DEFAULT_ALLOWED_EXTENSION.toArray(new String[0]));
        }
        catch (FileException fe)
        {
            throw new IOException(fe.getDefaultMessage(), fe);
        }
        catch (Exception e)
        {
            throw new IOException(e.getMessage(), e);
        }
    }

    public static final String upload(String baseDir, MultipartFile file,String busType) throws IOException
    {
        try
        {
            String upload = upload(baseDir + File.separator + busType, file, MimeTypeUtils.DEFAULT_ALLOWED_EXTENSION.toArray(new String[0]));
            return File.separator + busType + upload;
        }
        catch (FileException fe)
        {
            throw new IOException(fe.getDefaultMessage(), fe);
        }
        catch (Exception e)
        {
            throw new IOException(e.getMessage(), e);
        }
    }

    /**
     * 文件上传
     *
     * @param baseDir 相对应用的基目录
     * @param file 上传的文件
     * @param allowedExtension 上传文件类型
     * @return 返回上传成功的文件名
     * @throws FileSizeLimitExceededException 如果超出最大大小
     * @throws FileNameLengthLimitExceededException 文件名太长
     * @throws IOException 比如读写文件出错时
     * @throws InvalidExtensionException 文件校验异常
     */
    public static final String upload(String baseDir, MultipartFile file, String[] allowedExtension)
            throws FileSizeLimitExceededException, IOException, FileNameLengthLimitExceededException,
            InvalidExtensionException
    {
        int fileNamelength = Objects.requireNonNull(file.getOriginalFilename()).length();
        if (fileNamelength > FileUploadUtils.DEFAULT_FILE_NAME_LENGTH)
        {
            throw new FileNameLengthLimitExceededException(FileUploadUtils.DEFAULT_FILE_NAME_LENGTH);
        }

        assertAllowed(file, allowedExtension);

        String fileName = extractFilename(file);

        String absPath = getAbsoluteFile(baseDir, fileName).getAbsolutePath();
        String type = FileTypeUtil.getType(file.getInputStream(),fileName);
        File target = FileUtils.getFile(absPath);
        file.transferTo(target);
        if(!isAllowedExtension(type,allowedExtension)){
            FileUtil.del(target);
            throw new RuntimeException("上传文件类型不允许");
        }
        return getPathFileName(fileName);
    }

    public static final String uploadBase64(String baseDir, FileBase64Vo file)
            throws FileSizeLimitExceededException, IOException, FileNameLengthLimitExceededException,
            InvalidExtensionException{

        byte[] decode = Base64.decode(file.getContent());
        String extension = file.getExtension();
        if(StringUtils.isEmpty(extension) || "null".equals(extension))
        {
            extension="png";
        }
        String fileName = extractFilename(extension);
        File absoluteFile = getAbsoluteFile(baseDir, fileName);
        FileUtil.writeBytes(decode,absoluteFile);
        return getPathFileName(fileName);
    }




    /**
     * 编码文件名
     */
    public static final String extractFilename(MultipartFile file)
    {
        return StringUtils.format("{}/{}.{}", DateUtils.datePath(), Seq.getId(Seq.uploadSeqType), FileTypeUtils.getExtension(file));
    }

    /**
     * 编码文件名
     */
    public static final String extractFilename(String fileLast)
    {
        return StringUtils.format("{}/{}.{}", DateUtils.datePath(), Seq.getId(Seq.uploadSeqType), fileLast);
    }


    public static final File getAbsoluteFile(String uploadDir, String fileName) throws IOException
    {
        File desc = FileUtils.getFile(uploadDir,fileName);
        //File desc = new File(uploadDir + File.separator + fileName);
        String path = StringEscapeUtils.escapeEcmaScript(desc.getAbsolutePath());
        String file = StringEscapeUtils.escapeEcmaScript(desc.getParentFile().getName());
        log.info("当前上传文件地址：{}",path);
        if (!desc.exists())
        {
            if (!desc.getParentFile().exists())
            {
                log.info("创建文件夹:{}",file);
                desc.getParentFile().mkdirs();
            }
        }
        return desc.isAbsolute() ? desc : desc.getAbsoluteFile();
    }

    private static final String getPathFileName(String fileName) throws IOException
    {
        String pathFileName = "/" + fileName;
        return pathFileName;
    }

    /**
     * 文件大小校验
     *
     * @param file 上传的文件
     * @throws FileSizeLimitExceededException 如果超出最大大小
     * @throws InvalidExtensionException 文件校验异常
     */
    public static final void assertAllowed(MultipartFile file, String[] allowedExtension)
            throws FileSizeLimitExceededException, InvalidExtensionException
    {
        long size = file.getSize();
        if (size > DEFAULT_MAX_SIZE)
        {
            throw new FileSizeLimitExceededException(DEFAULT_MAX_SIZE / 1024 / 1024);
        }

        String fileName = file.getOriginalFilename();
        String extension = FileTypeUtils.getExtension(file);
        if (allowedExtension != null && !isAllowedExtension(extension, allowedExtension))
        {
            if (allowedExtension == MimeTypeUtils.IMAGE_EXTENSION.toArray(new String[0]))
            {
                throw new InvalidExtensionException.InvalidImageExtensionException(allowedExtension, extension,
                        fileName);
            }
            else if (allowedExtension == MimeTypeUtils.FLASH_EXTENSION.toArray(new String[0]))
            {
                throw new InvalidExtensionException.InvalidFlashExtensionException(allowedExtension, extension,
                        fileName);
            }
            else if (allowedExtension == MimeTypeUtils.MEDIA_EXTENSION.toArray(new String[0]))
            {
                throw new InvalidExtensionException.InvalidMediaExtensionException(allowedExtension, extension,
                        fileName);
            }
            else if (allowedExtension == MimeTypeUtils.VIDEO_EXTENSION.toArray(new String[0]))
            {
                throw new InvalidExtensionException.InvalidVideoExtensionException(allowedExtension, extension,
                        fileName);
            }
            else
            {
                throw new InvalidExtensionException(allowedExtension, extension, fileName);
            }
        }
    }

    /**
     * 判断MIME类型是否是允许的MIME类型
     *
     * @param extension 上传文件类型
     * @param allowedExtension 允许上传文件类型
     * @return true/false
     */
    public static final boolean isAllowedExtension(String extension, String[] allowedExtension)
    {
        for (String str : allowedExtension)
        {
            if (str.equalsIgnoreCase(extension))
            {
                return true;
            }
        }
        return false;
    }
}