Spring Security & Multipart请求

Question

我有一个用Spring Security和OAuth2保护的@Controller，我试图让我的用户上传一个文件：

@Controller
@RequestMapping(value = "/api/image")
public class ImageController {

    @PreAuthorize("hasAuthority('ROLE_USER')")
    @RequestMapping(value = "/upload", method = RequestMethod.PUT)
    public @ResponseBody Account putImage(@RequestParam("title") String title, MultipartHttpServletRequest request, Principal principal){
        // Some type of file processing...
        System.out.println("-------------------------------------------");
        System.out.println("Test upload: " + title);
        System.out.println("Test upload: " + request.getFile("file").getOriginalFilename());
        System.out.println("-------------------------------------------");

        return ((Account) ((OAuth2Authentication) principal).getPrincipal());
    }
}

当我尝试上传文件和标题时，我得到了以下异常。我将Content-Type标头设置为multipart/form-data。

java.lang.IllegalStateException: Current request is not of type [org.springframework.web.multipart.MultipartHttpServletRequest]: SecurityContextHolderAwareRequestWrapper[ FirewalledRequest[ org.apache.catalina.connector.RequestFacade@1aee75b7]]
    at org.springframework.web.servlet.mvc.method.annotation.ServletRequestMethodArgumentResolver.resolveArgument(ServletRequestMethodArgumentResolver.java:84)
    at org.springframework.web.method.support.HandlerMethodArgumentResolverComposite.resolveArgument(HandlerMethodArgumentResolverComposite.java:75)
    at org.springframework.web.method.support.InvocableHandlerMethod.getMethodArgumentValues(InvocableHandlerMethod.java:156)
    at org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod.java:117)

如何在Spring Security背后上传文件？看起来请求永远不会转换成MultiPartHttpServerRequest，所以它不能工作？

如果我更改我的方法签名以获取@RequestParam MultipartFile，那么我会得到一个异常，如下所示：

DEBUG DefaultListableBeanFactory - Returning cached instance of singleton bean 'imageController'
DEBUG ExceptionHandlerExceptionResolver - Resolving exception from handler [public com.tinsel.server.model.Account com.tinsel.server.controller.ImageController.putImage(java.lang.String,org.springframework.web.multipart.MultipartFile,java.security.Principal)]: java.lang.IllegalArgumentException: Expected MultipartHttpServletRequest: is a MultipartResolver configured?
DEBUG ResponseStatusExceptionResolver - Resolving exception from handler [public com.tinsel.server.model.Account com.tinsel.server.controller.ImageController.putImage(java.lang.String,org.springframework.web.multipart.MultipartFile,java.security.Principal)]: java.lang.IllegalArgumentException: Expected MultipartHttpServletRequest: is a MultipartResolver configured?
DEBUG DefaultHandlerExceptionResolver - Resolving exception from handler [public com.tinsel.server.model.Account com.tinsel.server.controller.ImageController.putImage(java.lang.String,org.springframework.web.multipart.MultipartFile,java.security.Principal)]: java.lang.IllegalArgumentException: Expected MultipartHttpServletRequest: is a MultipartResolver configured?
DEBUG DispatcherServlet - Could not complete request
java.lang.IllegalArgumentException: Expected MultipartHttpServletRequest: is a MultipartResolver configured?
    at org.springframework.util.Assert.notNull(Assert.java:112)

我的...but中确实配置了一个MultipartResolver：

<bean id="multipartResolver" class="org.springframework.web.multipart.commons.CommonsMultipartResolver">
    <property name="maxUploadSize" value="268435456"/> <!-- 256 megs -->
</bean>

我确实看过this blog post about getting this working under Spring 3.0 --但我正在努力保持更新，目前使用的是3.1。有没有更新过的补丁？

Answer 1

问题是我使用的是PUT而不是POST。Commons FileUpload被硬编码为只接受文件的POST请求。

检查那里的isMultipartContent method。要解决此问题，请使用POST或扩展该类，并覆盖该方法以按您喜欢的方式工作。

我为这个问题打开了FILEUPLOAD-214。

Answer 2

为了解决这个问题，请不要使用spring MultiPartHttpServerRequest，而是将请求作为HttpServletRequest，使用apache commons fileupload库解析来自PUT方法的请求，并对文件进行处理。下面是一些示例代码：

ServletFileUpload fileUpload = new ServletFileUpload(new DiskFileItemFactory());
List<FileItem> fileItems = fileUpload.parseRequest(httpServletRequest);
InputStream in = fileItems.get(0).getInputStream();
...

Answer 3

在Config.groovy中

确保启用了multipart，

// whether to disable processing of multi part requests
   grails.web.disable.multipart=false

在控制器中添加Post方法

def upload(){
    MultipartHttpServletRequest mpr = (MultipartHttpServletRequest)request;
    if(request instanceof MultipartHttpServletRequest)
            {
                CommonsMultipartFile f = (CommonsMultipartFile) mpr.getFile("myFile");
                println f.contentType
                f.transferTo()
                if(!f.empty)
                    flash.message = 'success'
                else
                    flash.message = 'file cannot be empty'
            }
    else
    flash.message = 'request is not of type MultipartHttpServletRequest'}

有了这些，我可以上传文件，没有任何相关的Spring Security。