100 lines
4.4 KiB
Java
100 lines
4.4 KiB
Java
package cn.keking.service.impl;
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import cn.keking.config.ConfigConstants;
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import cn.keking.model.FileAttribute;
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import cn.keking.model.ReturnResponse;
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import cn.keking.service.FilePreview;
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import cn.keking.utils.DownloadUtils;
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import cn.keking.service.FileHandlerService;
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import cn.keking.utils.PdfUtils;
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import cn.keking.web.filter.BaseUrlFilter;
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import org.springframework.stereotype.Service;
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import org.springframework.ui.Model;
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import java.util.List;
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/**
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* Created by kl on 2018/1/17.
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* Content :处理pdf文件
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*/
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@Service
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public class PdfFilePreviewImpl implements FilePreview {
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private final FileHandlerService fileHandlerService;
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private final PdfUtils pdfUtils;
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private final DownloadUtils downloadUtils;
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private static final String FILE_DIR = ConfigConstants.getFileDir();
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public PdfFilePreviewImpl(FileHandlerService fileHandlerService,
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PdfUtils pdfUtils,
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DownloadUtils downloadUtils) {
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this.fileHandlerService = fileHandlerService;
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this.pdfUtils = pdfUtils;
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this.downloadUtils = downloadUtils;
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}
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@Override
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public String filePreviewHandle(String url, Model model, FileAttribute fileAttribute) {
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String suffix=fileAttribute.getSuffix();
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String fileName=fileAttribute.getName();
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String officePreviewType = fileAttribute.getOfficePreviewType();
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String baseUrl = BaseUrlFilter.getBaseUrl();
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String pdfName = fileName.substring(0, fileName.lastIndexOf(".") + 1) + "pdf";
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String outFilePath = FILE_DIR + pdfName;
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if (OfficeFilePreviewImpl.OFFICE_PREVIEW_TYPE_IMAGE.equals(officePreviewType) || OfficeFilePreviewImpl.OFFICE_PREVIEW_TYPE_ALL_IMAGES.equals(officePreviewType)) {
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//当文件不存在时，就去下载
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if (!fileHandlerService.listConvertedFiles().containsKey(pdfName) || !ConfigConstants.isCacheEnabled()) {
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ReturnResponse<String> response = downloadUtils.downLoad(fileAttribute, fileName);
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if (0 != response.getCode()) {
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model.addAttribute("fileType", suffix);
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model.addAttribute("msg", response.getMsg());
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return "fileNotSupported";
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}
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outFilePath = response.getContent();
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if (ConfigConstants.isCacheEnabled()) {
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// 加入缓存
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fileHandlerService.addConvertedFile(pdfName, fileHandlerService.getRelativePath(outFilePath));
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}
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}
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List<String> imageUrls = pdfUtils.pdf2jpg(outFilePath, pdfName, baseUrl);
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if (imageUrls == null || imageUrls.size() < 1) {
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model.addAttribute("msg", "pdf转图片异常，请联系管理员");
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model.addAttribute("fileType",fileAttribute.getSuffix());
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return "fileNotSupported";
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}
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model.addAttribute("imgurls", imageUrls);
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model.addAttribute("currentUrl", imageUrls.get(0));
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if (OfficeFilePreviewImpl.OFFICE_PREVIEW_TYPE_IMAGE.equals(officePreviewType)) {
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return "officePicture";
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} else {
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return "picture";
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}
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} else {
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// 不是http开头，浏览器不能直接访问，需下载到本地
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if (url != null && !url.toLowerCase().startsWith("http")) {
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if (!fileHandlerService.listConvertedFiles().containsKey(pdfName) || !ConfigConstants.isCacheEnabled()) {
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ReturnResponse<String> response = downloadUtils.downLoad(fileAttribute, pdfName);
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if (0 != response.getCode()) {
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model.addAttribute("fileType", suffix);
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model.addAttribute("msg", response.getMsg());
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return "fileNotSupported";
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}
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model.addAttribute("pdfUrl", fileHandlerService.getRelativePath(response.getContent()));
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if (ConfigConstants.isCacheEnabled()) {
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// 加入缓存
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fileHandlerService.addConvertedFile(pdfName, fileHandlerService.getRelativePath(outFilePath));
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}
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} else {
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model.addAttribute("pdfUrl", pdfName);
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}
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} else {
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model.addAttribute("pdfUrl", url);
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}
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}
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return "pdf";
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}
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}
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