Spring Boot（1.2.5.RELEASE）Resttemplate多部分文件上传UTF-8文件名不可能 [英] Spring Boot (1.2.5.RELEASE) Resttemplate Multipart File Upload UTF-8 Filename not possible

问题描述

我有一个Spring Boot Rest服务，通过RestTemplate交换方法上传文件。上传是正常工作，因为它应该是utf-8文件名有问题，例如包含像äöü这样的德语变音单。
从HTML5应用程序上传文件时，它的工作没有任何问题，因此在接收服务中不会出现问题。

不要为多音节变奏曲由？替代（例如Überschrift.txt获取？berschrift.txt），因为US-ASCII用于文件名编码。我尝试使用以下代码将MultipartCharset设置为UTF-8：

 （（AllEncompassingFormHttpMessageConverter）restTemplate.getMessageConverters（）。get ））setMultipartCharset（Charset.forName（ UTF-8））; 
  

然后将文件名放在请求中：
Content-Disposition：form-数据; NAME = 文件;文件名==？UTF-8？Q？= C3 = 9Cberschrift.txt？=

变音符是编码的，但文件名完全像这样传输，正确的变音器。我想我缺少一些财产来设置，所以在请求中，变音符真的设置为变音符。

我的代码的相关部分是这样的：

  BufferedWriter bw = new BufferedWriter（new OutputStreamWriter（new FileOutputStream（uploadFile），UTF-8））; bw.append（capturedDocument.getText（））; 
 bw.newLine（）; 
 bw.flush（）; 
 bw.close（）; 
 
 String complianceServiceUrl = complianceBackendRestSettings.getComplianceServiceURL（）; 
 RestTemplate restTemplate = new RestTemplate（）; 
（（AllEncompassingFormHttpMessageConverter）restTemplate.getMessageConverters（）。get（4））。setMultipartCharset（Charset.forName（UTF-8））; 
 ResponseEntity< JSONBoolean> responseEntity = null; 
 HttpHeaders uploadHeaders = new HttpHeaders（）; 
 uploadHeaders.set（授权，授权）; 
 uploadHeaders.setContentType（MediaType.MULTIPART_FORM_DATA）; 
 LinkedMultiValueMap< String，Object> uploadMap = new LinkedMultiValueMap< String，Object>（）; 
 uploadMap.add（file，new FileSystemResource（uploadFile.getAbsolutePath（）））; 
 uploadMap.add（abonnementId，abos.toString（））; 
 HttpEntity< LinkedMultiValueMap< String，Object>> uploadRequestEntity = new HttpEntity< LinkedMultiValueMap< String，Object>>（
 uploadMap，uploadHeaders）; 
 responseEntity = restTemplate.exchange（complianceServiceUrl +/ uploadandassign，HttpMethod.POST，
 uploadRequestEntity，JSONBoolean.class）; 
  

文件中的变音符是完整的，所以这只是文件名编码的问题。 p>

我希望有任何解决这个问题的提示。

解决方案

我也遇到同样的问题，问题是Spring的 RestTemplate 遵循 RFC 2047 ，但 StandardMultipartHttpServletRequest 仅支持 RFC 6266 格式，或标题需要在UTF-8中（某些浏览器的行为是什么）。

我已经填写错误请求。我刚刚验证了commons-fileupload库将正确处理这个。如果您使用的是Spring Boot，您将需要：

1. 在类路径上添加commons-fileupload 1.3.2

    <依赖关系> 
   < groupId> commons-fileupload< / groupId> 
   < artifactId> commons-fileupload< / artifactId> 
   < version> 1.3.2< / version> 
   < / dependency> 
     




2. 禁用MultipartAutoConfiguration - 例如通过属性 spring.http.multipart .enabled = false 或 @EnableAutoConfiguration（exclude = {MultipartAutoConfiguration.class}）




3. 在配置类中定义MultipartResolver

     @Bean 
    public MultipartResolver multipartResolver（）{
    return new CommonsMultipartResolver（）; 
   } 
     

I have a Spring Boot Rest Service which uploads a file via the RestTemplate exchange method. The upload is working as it should but there is a problem with utf-8 filenames which for example contain german umlauts like äöü. When uploading a file from a HTML5 App it is working without any problem so it is not a problem at the receiving service.

Without setting any encoding for the MultipartCharset the umlauts are replaced by "?" (e.g. Überschrift.txt gets ?berschrift.txt), as US-ASCII is used for the filename encoding. I tried setting the MultipartCharset to UTF-8 with this code:

((AllEncompassingFormHttpMessageConverter)restTemplate.getMessageConverters().get(4)).setMultipartCharset(Charset.forName("UTF-8"));

Then the filename is put like this into the request: Content-Disposition: form-data; name="file"; filename="=?UTF-8?Q?=C3=9Cberschrift.txt?="

The umlauts are encoded but the filename is transfered exactly like this and not with the correct umlauts. I think I am missing some property to set so the umlauts are really set as umlauts in the request.

The relevant part of my code is this:

BufferedWriter bw = new BufferedWriter(new OutputStreamWriter(new FileOutputStream(uploadFile),"UTF-8"));    bw.append(capturedDocument.getText());
bw.newLine();
bw.flush();
bw.close();

String complianceServiceUrl = complianceBackendRestSettings.getComplianceServiceURL();
            RestTemplate restTemplate = new RestTemplate();
            ((AllEncompassingFormHttpMessageConverter)restTemplate.getMessageConverters().get(4)).setMultipartCharset(Charset.forName("UTF-8"));
ResponseEntity<JSONBoolean> responseEntity = null;
HttpHeaders uploadHeaders = new HttpHeaders();
uploadHeaders.set("Authorization", authorization);
uploadHeaders.setContentType(MediaType.MULTIPART_FORM_DATA);
LinkedMultiValueMap<String, Object> uploadMap = new LinkedMultiValueMap<String, Object>();
uploadMap.add("file", new FileSystemResource(uploadFile.getAbsolutePath()));
uploadMap.add("abonnementId", abos.toString());
                HttpEntity<LinkedMultiValueMap<String, Object>> uploadRequestEntity = new HttpEntity<LinkedMultiValueMap<String, Object>>(
                        uploadMap, uploadHeaders);
responseEntity = restTemplate.exchange(complianceServiceUrl + "/uploadandassign", HttpMethod.POST,
uploadRequestEntity, JSONBoolean.class);

The umlauts in the files are complete correctly, so it's only the problem with the filename encoding.

I would appreciate any hint for a solution to this problem.

解决方案

I also faced same issue, problem is that Spring's RestTemplate follows RFC 2047, but StandardMultipartHttpServletRequest supports only RFC 6266 format, or headers needs to be in UTF-8 already (what is some browsers behavior).

I've already filled bug request. I've just verified that commons-fileupload library will handle this correctly. If you are using Spring Boot, you will need:

1. Add commons-fileupload 1.3.2 on classpath

   <dependency>
       <groupId>commons-fileupload</groupId>
       <artifactId>commons-fileupload</artifactId>
       <version>1.3.2</version>
   </dependency>
   

2. Disable MultipartAutoConfiguration - for example by property spring.http.multipart.enabled=false or by @EnableAutoConfiguration(exclude={MultipartAutoConfiguration.class})

3. Define MultipartResolver in your configuration class

   @Bean
   public MultipartResolver multipartResolver() {
       return new CommonsMultipartResolver();
   }
   

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