com.necl.core.controller.DownloadFileController.java Source code

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Here is the source code for com.necl.core.controller.DownloadFileController.java

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package com.necl.core.controller;

import com.necl.core.model.ConfigSystem;
import com.necl.core.service.ConfigSystemService;
import java.io.BufferedInputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.net.URLConnection;
import java.nio.charset.Charset;
import java.util.Calendar;
import java.util.Date;
import javax.servlet.http.HttpServletResponse;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.util.FileCopyUtils;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.bind.annotation.RequestParam;

/**
 *
 * @author C13.207
 */
@Controller
public class DownloadFileController {

    @Autowired
    ConfigSystemService configSystemService;

    @RequestMapping(value = "/download", method = RequestMethod.GET)
    public void downloadFile(HttpServletResponse response, @RequestParam String id) throws IOException, Exception {
        String pre_year = "20";
        String post_year = id.substring(3, 5);
        String full_year = pre_year + post_year + "/";
        String keyFind = "PATH";
        ConfigSystem configSystem = configSystemService.findByKey(keyFind);
        String saveDirectory = configSystem.getConfigText() + full_year;
        File file = null;

        String name = id.replace("/", "_");
        String type = ".pdf";
        String pathDirectory = saveDirectory + name + type;
        System.out.println("path:" + pathDirectory);
        file = new File(pathDirectory);

        if (!file.exists()) {
            String errorMessage = "Sorry. The file you are looking for does not exist";
            OutputStream outputStream = response.getOutputStream();
            outputStream.write(errorMessage.getBytes(Charset.forName("UTF-8")));
            outputStream.close();
            return;
        }

        String mimeType = URLConnection.guessContentTypeFromName(file.getName());
        if (mimeType == null) {
            mimeType = "application/octet-stream";
        }

        response.setContentType(mimeType);

        /* "Content-Disposition : inline" will show viewable types [like images/text/pdf/anything viewable by browser] right on browser 
         while others(zip e.g) will be directly downloaded [may provide save as popup, based on your browser setting.]*/
        response.setHeader("Content-Disposition", String.format("inline; filename=\"" + file.getName() + "\""));

        /* "Content-Disposition : attachment" will be directly download, may provide save as popup, based on your browser setting*/
        //response.setHeader("Content-Disposition", String.format("attachment; filename=\"%s\"", file.getName()));
        response.setContentLength((int) file.length());

        InputStream inputStream = new BufferedInputStream(new FileInputStream(file));

        //Copy bytes from source to destination(outputstream in this example), closes both streams.
        FileCopyUtils.copy(inputStream, response.getOutputStream());
    }

    @RequestMapping(value = "/downloadTraining", method = RequestMethod.GET)
    public void downloadFileTraining(HttpServletResponse response, @RequestParam String id)
            throws IOException, Exception {
        Calendar cal = Calendar.getInstance();
        int year = cal.get(Calendar.YEAR);

        String keyFind = "PATH";
        ConfigSystem configSystem = configSystemService.findByKey(keyFind);
        String saveDirectory = configSystem.getConfigText() + year + "/";
        File file = null;

        String name = id.replace("/", "_");
        String type = ".pdf";
        String pathDirectory = saveDirectory + name + type;
        file = new File(pathDirectory);

        if (!file.exists()) {
            String errorMessage = "Sorry. The file you are looking for does not exist";
            System.out.println(errorMessage);
            OutputStream outputStream = response.getOutputStream();
            outputStream.write(errorMessage.getBytes(Charset.forName("UTF-8")));
            outputStream.close();
            return;
        }

        String mimeType = URLConnection.guessContentTypeFromName(file.getName());
        if (mimeType == null) {
            mimeType = "application/octet-stream";
        }

        response.setContentType(mimeType);

        /* "Content-Disposition : inline" will show viewable types [like images/text/pdf/anything viewable by browser] right on browser 
         while others(zip e.g) will be directly downloaded [may provide save as popup, based on your browser setting.]*/
        response.setHeader("Content-Disposition", String.format("inline; filename=\"" + file.getName() + "\""));

        /* "Content-Disposition : attachment" will be directly download, may provide save as popup, based on your browser setting*/
        //response.setHeader("Content-Disposition", String.format("attachment; filename=\"%s\"", file.getName()));
        response.setContentLength((int) file.length());

        InputStream inputStream = new BufferedInputStream(new FileInputStream(file));

        //Copy bytes from source to destination(outputstream in this example), closes both streams.
        FileCopyUtils.copy(inputStream, response.getOutputStream());
    }

    @RequestMapping(value = "/downloadManual", method = RequestMethod.GET)
    public void downloadFileManual(HttpServletResponse response) throws IOException, Exception {
        String keyFind = "PATH";
        ConfigSystem configSystem = configSystemService.findByKey(keyFind);
        String saveDirectory = configSystem.getConfigText() + "Manual/";

        File file = null;

        String type = ".pdf";
        String pathDirectory = saveDirectory + "ApprovalControlManual" + type;
        System.out.println("pthDi: " + pathDirectory);
        file = new File(pathDirectory);

        if (!file.exists()) {
            String errorMessage = "Sorry. The file you are looking for does not exist";
            System.out.println(errorMessage);
            OutputStream outputStream = response.getOutputStream();
            outputStream.write(errorMessage.getBytes(Charset.forName("UTF-8")));
            outputStream.close();
            return;
        }

        String mimeType = URLConnection.guessContentTypeFromName(file.getName());
        if (mimeType == null) {
            mimeType = "application/octet-stream";
        }

        System.out.println("mimetype : " + mimeType);

        response.setContentType(mimeType);

        /* "Content-Disposition : inline" will show viewable types [like images/text/pdf/anything viewable by browser] right on browser 
         while others(zip e.g) will be directly downloaded [may provide save as popup, based on your browser setting.]*/
        response.setHeader("Content-Disposition", String.format("inline; filename=\"" + file.getName() + "\""));

        /* "Content-Disposition : attachment" will be directly download, may provide save as popup, based on your browser setting*/
        //response.setHeader("Content-Disposition", String.format("attachment; filename=\"%s\"", file.getName()));
        response.setContentLength((int) file.length());

        InputStream inputStream = new BufferedInputStream(new FileInputStream(file));

        //Copy bytes from source to destination(outputstream in this example), closes both streams.
        FileCopyUtils.copy(inputStream, response.getOutputStream());
    }

    @RequestMapping(value = "/downloadApprovalCriteria", method = RequestMethod.GET)
    public void downloadApprovalCriteria(HttpServletResponse response) throws IOException, Exception {
        String keyFind = "PATH";
        ConfigSystem configSystem = configSystemService.findByKey(keyFind);
        String saveDirectory = configSystem.getConfigText() + "Manual/";

        File file = null;

        String type = ".pdf";
        String pathDirectory = saveDirectory + "ApprovalCriteria" + type;
        System.out.println("pthDi: " + pathDirectory);
        file = new File(pathDirectory);

        if (!file.exists()) {
            String errorMessage = "Sorry. The file you are looking for does not exist";
            System.out.println(errorMessage);
            OutputStream outputStream = response.getOutputStream();
            outputStream.write(errorMessage.getBytes(Charset.forName("UTF-8")));
            outputStream.close();
            return;
        }

        String mimeType = URLConnection.guessContentTypeFromName(file.getName());
        if (mimeType == null) {
            System.out.println("mimetype is not detectable, will take default");
            mimeType = "application/octet-stream";
        }

        System.out.println("mimetype : " + mimeType);

        response.setContentType(mimeType);

        /* "Content-Disposition : inline" will show viewable types [like images/text/pdf/anything viewable by browser] right on browser 
         while others(zip e.g) will be directly downloaded [may provide save as popup, based on your browser setting.]*/
        response.setHeader("Content-Disposition", String.format("inline; filename=\"" + file.getName() + "\""));

        /* "Content-Disposition : attachment" will be directly download, may provide save as popup, based on your browser setting*/
        //response.setHeader("Content-Disposition", String.format("attachment; filename=\"%s\"", file.getName()));
        response.setContentLength((int) file.length());

        InputStream inputStream = new BufferedInputStream(new FileInputStream(file));

        //Copy bytes from source to destination(outputstream in this example), closes both streams.
        FileCopyUtils.copy(inputStream, response.getOutputStream());
    }

}