com.fastchar.pdfviewer.action.PDFAction Maven / Gradle / Ivy

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package com.fastchar.pdfviewer.action;

import com.fastchar.core.FastAction;
import com.fastchar.core.FastChar;
import com.fastchar.utils.FastFileUtils;
import com.fastchar.utils.FastHttpURLConnectionUtils;
import com.fastchar.utils.FastMD5Utils;
import com.fastchar.utils.FastStringUtils;
import java.io.InputStream;

/**
 * @author 沈建（Janesen）
 * @date 2021/10/22 10:28
 */
public class PDFAction extends FastAction {
    @Override
    protected String getRoute() {
        return "/web/pdf";
    }


    /**
     * 在线实时预览pdf文件
     * 参数：
     * url 文件地址
     */
    public void viewer() {
        String url = getParam("url", true);
        if (url.startsWith("http://") || url.startsWith("https://")) {
            String key = FastMD5Utils.MD5To16(url);
            FastChar.getMemoryCache().put(key, url);
            redirect("/base/pdfviewer/web/viewer.html?file=" + getProjectHost() + "web/pdf/open/" + key);
        }
        redirect( "/base/pdfviewer/web/viewer.html?file=" + url);
    }


    /**
     * 打开文件流
     * 参数：
     * url 文件地址
     */
    public void open() {
        String urlParam = getUrlParam(0);
        String fileUrl = FastChar.getMemoryCache().get(urlParam);
        if (FastStringUtils.isEmpty(fileUrl)) {
            responseText("无效文件地址！");
        }
        fileUrl = fileUrl.split("@")[0];
        try {
            InputStream inputStream = FastHttpURLConnectionUtils.getInputStream(fileUrl);
            if (inputStream != null) {
                responseStream(inputStream, "application/pdf");
            }
        } catch (Exception e) {
            e.printStackTrace();
        }
        responseText("文件流打开失败！");
    }

}