https://www.heckjj.com/index.php zh-cn https://www.heckjj.com/post// Heck <@hecks.tk> Mon, 17 Jul 2023 11:53:35 +0000 https://www.heckjj.com/post//
具体错误日志(参考)
undertow

java.nio.file.NoSuchFileException: /tmp/undertow.17753558642503713859.8085/undertow7370242804103803588upload

Tomcat

The temporary upload location [/tmp/tomcat.7957874575370093230.8088/work/Tomcat/localhost/ROOT] is not valid

重现方法
找到类 io.undertow.server.handlers.form.MultiPartParserDefinition
定位到如下代码

@Override
public void beginPart(final HeaderMap headers) {
    this.currentFileSize = 0;
    this.headers = headers;
    final String disposition = headers.getFirst(Headers.CONTENT_DISPOSITION);
    if (disposition != null) {
        if (disposition.startsWith("form-data")) {
            currentName = Headers.extractQuotedValueFromHeader(disposition, "name");
            fileName = Headers.extractQuotedValueFromHeaderWithEncoding(disposition, "filename");
            if (fileName != null && fileSizeThreshold == 0) {
                try {
                    if (tempFileLocation != null) {
                        file = Files.createTempFile(tempFileLocation, "undertow", "upload");
                    } else {
                        file = Files.createTempFile("undertow", "upload");
                    }
                    createdFiles.add(file);
                    fileChannel = FileChannel.open(file, StandardOpenOption.READ, StandardOpenOption.WRITE);
                } catch (IOException e) {
                    throw new RuntimeException(e);
                }
            }
        }
    }
}

在 createdFiles.add(file); 处打断点，复制file的 path 的值找到该文件并将其删除；放开断点，错误重现；

解决方案
方案1 (推荐)
在 applicaiton.yml(applicaiton.property) 中添加配置 ：spring.servlet.multipart.location
spring.servlet.multipart.location 底层就是 createMultipartConfig 中的 factory.setLocation ，见源码：org.springframework.boot.autoconfigure.web.servlet.MultipartProperties#createMultipartConfig

spring:
  servlet:
    multipart:
      location: /data/tmp

手动指定目录后，必须保证该目录存在，并由读写的权限
创建该目录 mkdir -p /data/tmp

方法二
使用配置类配置, 类似方案1

@Bean
public MultipartConfigElement multipartConfigElement() {
    MultipartConfigFactory factory = new MultipartConfigFactory();
    factory.setLocation(System.getProperty("/data/tmp"));
    return factory.createMultipartConfig();
}

方案三(不推荐)
手动创建临时目录

mkdir -p /tmp/undertow.17753558642503713859.8085/undertow7370242804103803588upload

方案四(不推荐)
修改系统配置，排除该临时目录

vim /usr/lib/tmpfiles.d/tmp.con
# 文件最后添加
x /tmp/undertow* ]]> https://www.heckjj.com/post//#blogcomment <user@domain.com> Thu, 01 Jan 1970 00:00:00 +0000 https://www.heckjj.com/post//#blogcomment