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https://gitee.com/kekingcn/file-online-preview.git
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90 lines
3.7 KiB
Java
90 lines
3.7 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.CadUtils;
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import cn.keking.utils.DownloadUtils;
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import cn.keking.service.FilePreviewCommonService;
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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 org.springframework.util.StringUtils;
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import static cn.keking.service.impl.OfficeFilePreviewImpl.getPreviewType;
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/**
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* @author chenjh
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* @since 2019/11/21 14:28
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*/
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@Service
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public class CadFilePreviewImpl implements FilePreview {
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private final FilePreviewCommonService filePreviewCommonService;
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private final DownloadUtils downloadUtils;
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private final CadUtils cadUtils;
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private final PdfUtils pdfUtils;
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public CadFilePreviewImpl(FilePreviewCommonService filePreviewCommonService,
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DownloadUtils downloadUtils,
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CadUtils cadUtils,
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PdfUtils pdfUtils) {
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this.filePreviewCommonService = filePreviewCommonService;
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this.downloadUtils = downloadUtils;
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this.cadUtils = cadUtils;
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this.pdfUtils = pdfUtils;
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}
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private static final String OFFICE_PREVIEW_TYPE_IMAGE = "image";
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private static final String OFFICE_PREVIEW_TYPE_ALL_IMAGES = "allImages";
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private static final String FILE_DIR = ConfigConstants.getFileDir();
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@Override
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public String filePreviewHandle(String url, Model model, FileAttribute fileAttribute) {
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// 预览Type，参数传了就取参数的，没传取系统默认
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String officePreviewType = model.asMap().get("officePreviewType") == null ? ConfigConstants.getOfficePreviewType() : model.asMap().get("officePreviewType").toString();
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String baseUrl = BaseUrlFilter.getBaseUrl();
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String suffix=fileAttribute.getSuffix();
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String fileName=fileAttribute.getName();
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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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// 判断之前是否已转换过，如果转换过，直接返回，否则执行转换
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if (!filePreviewCommonService.listConvertedFiles().containsKey(pdfName) || !ConfigConstants.isCacheEnabled()) {
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String filePath;
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ReturnResponse<String> response = downloadUtils.downLoad(fileAttribute, null);
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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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filePath = response.getContent();
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if (StringUtils.hasText(outFilePath)) {
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boolean convertResult = cadUtils.cadToPdf(filePath, outFilePath);
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if (!convertResult) {
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model.addAttribute("fileType", suffix);
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model.addAttribute("msg", "cad文件转换异常，请联系管理员");
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return "fileNotSupported";
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}
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if (ConfigConstants.isCacheEnabled()) {
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// 加入缓存
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filePreviewCommonService.addConvertedFile(pdfName, filePreviewCommonService.getRelativePath(outFilePath));
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}
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}
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}
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if (baseUrl != null && (OFFICE_PREVIEW_TYPE_IMAGE.equals(officePreviewType) || OFFICE_PREVIEW_TYPE_ALL_IMAGES.equals(officePreviewType))) {
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return getPreviewType(model, fileAttribute, officePreviewType, baseUrl, pdfName, outFilePath, pdfUtils, OFFICE_PREVIEW_TYPE_IMAGE);
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}
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model.addAttribute("pdfUrl", pdfName);
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return "pdf";
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}
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}
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