demo-attachment-downloader/src/main/java/com/tptj/demo/hg/attachment/downloader/Demo.java

package com.tptj.demo.hg.attachment.downloader;

import com.fr.cache.Attachment;
import com.fr.cache.AttachmentFileBase;
import com.fr.cache.AttachmentSource;
import com.fr.decision.webservice.v10.login.LoginService;
import com.fr.general.web.ParameterConstants;
import com.fr.intelli.record.Focus;
import com.fr.log.FineLoggerFactory;
import com.fr.record.analyzer.EnableMetrics;
import com.fr.stable.bridge.ObjectHolder;
import com.fr.stable.fun.assist.Selector;
import com.fr.stable.fun.impl.AbstractAttachmentDownloader;
import com.fr.web.fun.DefaultAttachmentDownloader;
import com.fr.web.utils.WebUtils;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

/**
 * @author 秃破天际
 * @version 10.0
 * Created by 秃破天际 on 2021/6/22
 **/
@EnableMetrics
public class Demo extends AbstractAttachmentDownloader {

    public Selector selector() {
        return new Selector() {
            @Override
            public boolean accept( ObjectHolder holder ) {
                HttpServletRequest req = holder.get(HttpServletRequest.class);
                String id = WebUtils.getHTTPRequestParameter(req, "id");
                String[] id_array = id.split("\\.");
                return true;
            }
        };
    }
    @Override
    @Focus(id="com.tptj.demo.hg.attachment.downloader.v10",text = "AttachmentDownloader")
    public void download(HttpServletRequest req, HttpServletResponse res, String id, String[] idArray) throws Exception {
        if(idArray.length != 1){
            DefaultAttachmentDownloader.getInstance().download(req,res,id,idArray);
            return;
        }
        //删除原来的附件
        AttachmentSource.removeAttachment(id);
        //创建一个新的附件
        AttachmentFileBase file = new AttachmentFileBase("D:/test", "Hello.txt");
        Attachment attachment = new Attachment( id, ParameterConstants.FILE, "Hello.txt",file);
        //把附件设置到缓存中
        AttachmentSource.putAttachment(id,attachment);
        //重新输出附件
        DefaultAttachmentDownloader.getInstance().download(req,res,id,idArray);
        //打印日志
        String username = LoginService.getInstance().getCurrentUserNameFromRequestCookie(req);
        //Attachment attachment = AttachmentSource.getAttachment(id);
        FineLoggerFactory.getLogger().info("User[{}] Loaded Attachment[{}]", username , attachment.getFilename() );
    }

    @Override
    public String createDownloadScript(String downloadURL) {
        return "window.open('" + downloadURL + "')";
    }
}