上传文件停止与意外EOF读取插座异常

Question

有时当我尝试上传一个文件在我的远程VPS我得到这个例外（以60％的上传proccess停止）

06-Jan-2016 11:59:36.801 SEVERE [http-nio-54000-exec-9] org.apache.catalina.core.StandardWrapperValve.invoke Servlet.service() for servlet [mvc-dispatcher] in context with path [] threw exception [Request processing failed; 
nested exception is org.springframework.web.multipart.MultipartException: Could not parse multipart servlet request; 
nested exception is org.apache.commons.fileupload.FileUploadBase$IOFileUploadException: Processing of multipart/form-data request failed. Unexpected EOF read on the socket] 
with root cause 
java.io.EOFException: Unexpected EOF read on the socket 

和Google Chrome的connextion丢失，如服务器关闭，我得到ERR_CONNECTION_ABORTED

我Spring MVC中上传文件中像这样

public void save_file(MultipartFile upfile , String path){ 

     try { 

      File fichier = new File(path) ; 
      byte[] bytes = upfile.getBytes(); 
      BufferedOutputStream stream = new BufferedOutputStream(new FileOutputStream(fichier)); 
      stream.write(bytes); 
      stream.close(); 
      System.out.println("You successfully uploaded " + upfile.getOriginalFilename() + "!"); 

     } catch (Exception e) { 
      System.out.println("You failed to upload " + upfile.getOriginalFilename() + " => " + e.getMessage()); ; 
     } 

} 

我的控制器：

@RequestMapping(value = "/administration/upload", method = RequestMethod.POST) 
public String Upload_AO_journal(
     @ModelAttribute UploadForm uploadForm, 
       Model map , HttpServletRequest request, HttpSession session) throws ParseException, UnsupportedEncodingException { 

我的豆

public class UploadForm { 

    ... 
    public MultipartFile scan; 

那么如何才能解决这个问题？

Answer 1

你试过流吗？

JSP代码：

<form method="POST" onsubmit="" ACTION="url?${_csrf.parameterName}=${_csrf.token}" ENCTYPE="multipart/form-data">

控制器：

@RequestMapping(
     value = "url", method = RequestMethod.POST 
) 
public void uploadFile(
     @RequestParam("file") MultipartFile file 
) throws IOException { 

InputStream input = upfile.getInputStream(); 
Path path = Paths.get(path);//check path 
OutputStream output = Files.newOutputStream(path); 
IOUtils.copy(in, out); //org.apache.commons.io.IOUtils or you can create IOUtils.copy 

} 

所有与春天4.0春季安全为我工作。

其次，你应该检查http连接是否超时。 Chrome不支持该配置。所以你可以使用Firefox，并按照这里http://morgb.blogspot.com.es/2014/05/firefox-29-and-http-response-timeout.html。

Answer 2

不确定upfile上的getBytes（）方法。更合适的方法是使用InputStream来管理任何大小的文件，并在必要时缓冲。就像：

public void save_file(MultipartFile upfile , String path){ 

    try { 
     File fichier = new File(path) ; 
     BufferedOutputStream stream = new BufferedOutputStream(new FileOutputStream(fichier)); 
     InputStream is = upfile.getInputStream(); 
     byte [] bytes = new byte[1024]; 
     int sizeRead; 
     while ((sizeRead = is.read(bytes,0, 1024)) > 0) { 
      stream.write(bytes, 0, sizeRead); 
     } 
     stream.flush(); 
     stream.close(); 
     System.out.println("You successfully uploaded " + upfile.getOriginalFilename() + "!"); 

    } catch (Exception e) { 
     System.out.println("You failed to upload " + upfile.getOriginalFilename() + " => " + e.getMessage()); ; 
    } 

} 

Answer 3

我有类似的问题，问题是当您上传文件，你正在使用多部分形式的POST请求。你可以阅读约MIME。

MIME-Version: 1.0 
Content-Type: multipart/mixed; boundary=frontier 

This is a message with multiple parts in MIME format. 
--frontier 
Content-Type: text/plain 

This is the body of the message. 
--frontier 
Content-Type: application/octet-stream 
Content-Transfer-Encoding: base64 

PGh0bWw+CiAgPGhlYWQ+CiAgPC9oZWFkPgogIDxib2R5PgogICAgPHA+VGhpcyBpcyB0aGUg 
Ym9keSBvZiB0aGUgbWVzc2FnZS48L3A+CiAgPC9ib2R5Pgo8L2h0bWw+Cg== 
--frontier-- 

发行基本上我是从请求多了元信息部分，正文部分和实际的文件编码，我相信用base64。每个部分都是按边界分开的。如果您没有设置此边界（在上面的示例中称为“边界”），则服务器开始正确地读取文件，但不知道它结束的位置，直到达到EOF并返回有关意外EOF的错误，因为它没有找到所需的边界。

您的代码存在的问题是，您正在将文件写入ByteOutputStream，当将文件从服务器返回给用户而非其他方式时，此文件适用。服务器期望使用某些标准的预定义格式设置此多部分请求。使用Apache Commons HttpClient库，可为您执行所有此请求的格式化和边界设置。如果你使用Maven那么this link。

File f = new File("/path/fileToUpload.txt"); 
PostMethod filePost = new PostMethod("http://host/some_path"); 
Part[] parts = { 
    new StringPart("param_name", "value"), 
    new FilePart(f.getName(), f) 
}; 
filePost.setRequestEntity(
    new MultipartRequestEntity(parts, filePost.getParams()) 
); 
HttpClient client = new HttpClient(); 
int status = client.executeMethod(filePost); 

免责声明：代码是不是我这是例如，从Apache website for multipart request

Answer 4

出现此问题的原因您关闭流，直到流写入全部数据。

错误方式：

stream.write(bytes); 
stream.close(); 

正确方法：

try (BufferedOutputStream stream = new BufferedOutputStream(new FileOutputStream(fichier))) 
{ 
    stream.write(data); 
} 

整个数据写入后，应关闭流。