100 lines
5.0 KiB
Java
100 lines
5.0 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.FileHandlerService;
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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.utils.WebUtils;
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import org.apache.commons.lang3.exception.ExceptionUtils;
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import org.apache.poi.EncryptedDocumentException;
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import org.springframework.stereotype.Service;
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import org.springframework.ui.Model;
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import java.io.IOException;
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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 OtherFilePreviewImpl otherFilePreview;
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private static final String PDF_PASSWORD_MSG = "password";
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public PdfFilePreviewImpl(FileHandlerService fileHandlerService, OtherFilePreviewImpl otherFilePreview) {
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this.fileHandlerService = fileHandlerService;
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this.otherFilePreview = otherFilePreview;
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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 pdfName = fileAttribute.getName(); //获取原始文件名
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String officePreviewType = fileAttribute.getOfficePreviewType(); //转换类型
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boolean forceUpdatedCache=fileAttribute.forceUpdatedCache(); //是否启用强制更新命令
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String outFilePath = fileAttribute.getOutFilePath(); //生成的文件路径
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String originFilePath = fileAttribute.getOriginFilePath(); //原始文件路径
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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 (forceUpdatedCache || !fileHandlerService.listConvertedFiles().containsKey(pdfName) || !ConfigConstants.isCacheEnabled()) {
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ReturnResponse<String> response = DownloadUtils.downLoad(fileAttribute, pdfName);
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if (response.isFailure()) {
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return otherFilePreview.notSupportedFile(model, fileAttribute, response.getMsg());
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}
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originFilePath = 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(originFilePath));
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}
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}
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List<String> imageUrls;
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try {
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imageUrls = fileHandlerService.pdf2jpg(originFilePath,outFilePath, pdfName, fileAttribute);
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} catch (Exception e) {
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Throwable[] throwableArray = ExceptionUtils.getThrowables(e);
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for (Throwable throwable : throwableArray) {
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if (throwable instanceof IOException || throwable instanceof EncryptedDocumentException) {
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if (e.getMessage().toLowerCase().contains(PDF_PASSWORD_MSG)) {
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model.addAttribute("needFilePassword", true);
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return EXEL_FILE_PREVIEW_PAGE;
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}
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}
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}
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return otherFilePreview.notSupportedFile(model, fileAttribute, "pdf转图片异常，请联系管理员");
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}
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if (imageUrls == null || imageUrls.size() < 1) {
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return otherFilePreview.notSupportedFile(model, fileAttribute, "pdf转图片异常，请联系管理员");
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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 OFFICE_PICTURE_FILE_PREVIEW_PAGE;
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} else {
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return PICTURE_FILE_PREVIEW_PAGE;
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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 (response.isFailure()) {
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return otherFilePreview.notSupportedFile(model, fileAttribute, response.getMsg());
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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", WebUtils.encodeFileName(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_FILE_PREVIEW_PAGE;
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}
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}
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