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优化：PDF文件下载缓存

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This commit is contained in:
陈精华
2020-05-19 14:21:38 +08:00
committed by kl
parent c16116c7cd
commit c7318c2b17
2 changed files with 29 additions and 14 deletions
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41
jodconverter-web/src/main/java/cn/keking/service/impl/PdfFilePreviewImpl.java
View File

@ -26,6 +26,8 @@ public class PdfFilePreviewImpl implements FilePreview {
private final DownloadUtils downloadUtils; private final DownloadUtils downloadUtils;
private static final String FILE_DIR = ConfigConstants.getFileDir();
public PdfFilePreviewImpl(FileUtils fileUtils, public PdfFilePreviewImpl(FileUtils fileUtils,
PdfUtils pdfUtils, PdfUtils pdfUtils,
DownloadUtils downloadUtils) { DownloadUtils downloadUtils) {
@ -41,16 +43,22 @@ public class PdfFilePreviewImpl implements FilePreview {
String officePreviewType = model.asMap().get("officePreviewType") == null ? ConfigConstants.getOfficePreviewType() : model.asMap().get("officePreviewType").toString(); String officePreviewType = model.asMap().get("officePreviewType") == null ? ConfigConstants.getOfficePreviewType() : model.asMap().get("officePreviewType").toString();
String baseUrl = BaseUrlFilter.getBaseUrl(); String baseUrl = BaseUrlFilter.getBaseUrl();
String pdfName = fileName.substring(0, fileName.lastIndexOf(".") + 1) + "pdf"; String pdfName = fileName.substring(0, fileName.lastIndexOf(".") + 1) + "pdf";
String outFilePath; String outFilePath = FILE_DIR + pdfName;
if (OfficeFilePreviewImpl.OFFICE_PREVIEW_TYPE_IMAGE.equals(officePreviewType) || OfficeFilePreviewImpl.OFFICE_PREVIEW_TYPE_ALL_IMAGES.equals(officePreviewType)) { if (OfficeFilePreviewImpl.OFFICE_PREVIEW_TYPE_IMAGE.equals(officePreviewType) || OfficeFilePreviewImpl.OFFICE_PREVIEW_TYPE_ALL_IMAGES.equals(officePreviewType)) {
//当文件不存在时，就去下载 //当文件不存在时，就去下载
ReturnResponse<String> response = downloadUtils.downLoad(fileAttribute, fileName); if (!fileUtils.listConvertedFiles().containsKey(pdfName) || !ConfigConstants.isCacheEnabled()) {
if (0 != response.getCode()) { ReturnResponse<String> response = downloadUtils.downLoad(fileAttribute, fileName);
model.addAttribute("fileType", suffix); if (0 != response.getCode()) {
model.addAttribute("msg", response.getMsg()); model.addAttribute("fileType", suffix);
return "fileNotSupported"; model.addAttribute("msg", response.getMsg());
return "fileNotSupported";
}
outFilePath = response.getContent();
if (ConfigConstants.isCacheEnabled()) {
// 加入缓存
fileUtils.addConvertedFile(pdfName, fileUtils.getRelativePath(outFilePath));
}
} }
outFilePath = response.getContent();
List<String> imageUrls = pdfUtils.pdf2jpg(outFilePath, pdfName, baseUrl); List<String> imageUrls = pdfUtils.pdf2jpg(outFilePath, pdfName, baseUrl);
if (imageUrls == null || imageUrls.size() < 1) { if (imageUrls == null || imageUrls.size() < 1) {
model.addAttribute("msg", "pdf转图片异常，请联系管理员"); model.addAttribute("msg", "pdf转图片异常，请联系管理员");
@ -67,13 +75,20 @@ public class PdfFilePreviewImpl implements FilePreview {
} else { } else {
// 不是http开头，浏览器不能直接访问，需下载到本地 // 不是http开头，浏览器不能直接访问，需下载到本地
if (url != null && !url.toLowerCase().startsWith("http")) { if (url != null && !url.toLowerCase().startsWith("http")) {
ReturnResponse<String> response = downloadUtils.downLoad(fileAttribute, pdfName); if (!fileUtils.listConvertedFiles().containsKey(pdfName) || !ConfigConstants.isCacheEnabled()) {
if (0 != response.getCode()) { ReturnResponse<String> response = downloadUtils.downLoad(fileAttribute, pdfName);
model.addAttribute("fileType", suffix); if (0 != response.getCode()) {
model.addAttribute("msg", response.getMsg()); model.addAttribute("fileType", suffix);
return "fileNotSupported"; model.addAttribute("msg", response.getMsg());
} else { return "fileNotSupported";
}
model.addAttribute("pdfUrl", fileUtils.getRelativePath(response.getContent())); model.addAttribute("pdfUrl", fileUtils.getRelativePath(response.getContent()));
if (ConfigConstants.isCacheEnabled()) {
// 加入缓存
fileUtils.addConvertedFile(pdfName, fileUtils.getRelativePath(outFilePath));
}
} else {
model.addAttribute("pdfUrl", pdfName);
} }
} else { } else {
model.addAttribute("pdfUrl", url); model.addAttribute("pdfUrl", url);

2
jodconverter-web/src/main/resources/web/index.ftl
View File

@ -195,7 +195,7 @@ window.open('http://127.0.0.1:8012/picturesPreview?urls='+encodeURIComponent(fil
}).on('pre-body.bs.table', function (e,data) { }).on('pre-body.bs.table', function (e,data) {
// 每个data添加一列用来操作 // 每个data添加一列用来操作
$(data).each(function (index, item) { $(data).each(function (index, item) {
item.action = "<a class='btn btn-default' target='_blank' href='${baseUrl}onlinePreview?url="+ encodeURIComponent('${baseUrl}' + encodeURI(item.fileName)) +"'>预览</a>" + item.action = "<a class='btn btn-default' target='_blank' href='${baseUrl}onlinePreview?url="+ encodeURIComponent('${baseUrl}' + item.fileName) +"'>预览</a>" +
"<a class='btn btn-default' href='javascript:void(0);' onclick='deleteFile(\""+item.fileName+"\")'>删除</a>"; "<a class='btn btn-default' href='javascript:void(0);' onclick='deleteFile(\""+item.fileName+"\")'>删除</a>";
}); });
return data; return data;