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修复 tif、tiff 文件预览初始内存太小预览失败的问题

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kl
2021-03-26 10:05:58 +08:00
parent 9883d3b064
commit 8f75df15e2
3 changed files with 15 additions and 0 deletions
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1
server/src/main/config/freemarker_implicit.ftl
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@@ -1,5 +1,6 @@
[#ftl] [#ftl]
[#-- @implicitly included --] [#-- @implicitly included --]
[#-- @ftlvariable name="initializeMemorySize" type="java.lang.Number" --]
[#-- @ftlvariable name="currentUrl" type="java.lang.String" --] [#-- @ftlvariable name="currentUrl" type="java.lang.String" --]
[#-- @ftlvariable name="file" type="cn.keking.model.FileAttribute" --] [#-- @ftlvariable name="file" type="cn.keking.model.FileAttribute" --]
[#-- @ftlvariable name="fileName" type="java.lang.String" --] [#-- @ftlvariable name="fileName" type="java.lang.String" --]

11
server/src/main/java/cn/keking/service/impl/TiffFilePreviewImpl.java
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@@ -2,8 +2,10 @@ package cn.keking.service.impl;
import cn.keking.model.FileAttribute; import cn.keking.model.FileAttribute;
import cn.keking.service.FilePreview; import cn.keking.service.FilePreview;
import cn.keking.utils.WebUtils;
import org.springframework.stereotype.Service; import org.springframework.stereotype.Service;
import org.springframework.ui.Model; import org.springframework.ui.Model;
import org.springframework.util.StringUtils;
/** /**
* tiff 图片文件处理 * tiff 图片文件处理
@@ -14,6 +16,9 @@ import org.springframework.ui.Model;
public class TiffFilePreviewImpl implements FilePreview { public class TiffFilePreviewImpl implements FilePreview {
private final PictureFilePreviewImpl pictureFilePreview; private final PictureFilePreviewImpl pictureFilePreview;
private static final String INITIALIZE_MEMORY_SIZE = "initializeMemorySize";
//默认初始化 50MB 内存
private static final long INITIALIZE_MEMORY_SIZE_VALUE_DEFAULT = 1024L * 1024 * 50;
public TiffFilePreviewImpl(PictureFilePreviewImpl pictureFilePreview) { public TiffFilePreviewImpl(PictureFilePreviewImpl pictureFilePreview) {
this.pictureFilePreview = pictureFilePreview; this.pictureFilePreview = pictureFilePreview;
@@ -22,6 +27,12 @@ public class TiffFilePreviewImpl implements FilePreview {
@Override @Override
public String filePreviewHandle(String url, Model model, FileAttribute fileAttribute) { public String filePreviewHandle(String url, Model model, FileAttribute fileAttribute) {
pictureFilePreview.filePreviewHandle(url,model,fileAttribute); pictureFilePreview.filePreviewHandle(url,model,fileAttribute);
String fileSize = WebUtils.getUrlParameterReg(url,INITIALIZE_MEMORY_SIZE);
if(StringUtils.hasText(fileSize)){
model.addAttribute(INITIALIZE_MEMORY_SIZE,fileSize);
}else {
model.addAttribute(INITIALIZE_MEMORY_SIZE,Long.toString(INITIALIZE_MEMORY_SIZE_VALUE_DEFAULT));
}
return TIFF_FILE_PREVIEW_PAGE; return TIFF_FILE_PREVIEW_PAGE;
} }
} }

3
server/src/main/resources/web/tiff.ftl
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@@ -30,6 +30,9 @@
var xhr = new XMLHttpRequest(); var xhr = new XMLHttpRequest();
xhr.responseType = 'arraybuffer'; xhr.responseType = 'arraybuffer';
xhr.open('GET', $("#currentUrl").val()); xhr.open('GET', $("#currentUrl").val());
var config = {};
config.TOTAL_MEMORY = ${initializeMemorySize};
Tiff.initialize(config)
xhr.onload = function (e) { xhr.onload = function (e) {
var tiff = new Tiff({buffer: xhr.response}); var tiff = new Tiff({buffer: xhr.response});
var canvas = tiff.toCanvas(); var canvas = tiff.toCanvas();