2023年7月24日 17:16:05go评论92阅读模式

英文:

Spring Boot: io.FileNotFound Exception when returning a file not cought by try - catch block

问题

The code you provided appears to be in Java and related to handling requests for files in a Spring Boot application. The main issue you're facing is that when a requested file does not exist, you want to return a 404 error, but currently, a 500 error is being returned. Additionally, you've mentioned that the stack trace points to Spring Security's JWT-Token implementation.

To ensure that the proper HTTP error (404) is returned when a file does not exist, you can make the following modifications to your code:

Check if the file exists before creating a UrlResource:

Before creating the UrlResource, you should check if the file exists on the file system. If it doesn't exist, you can throw a FileNotFoundException and handle it appropriately to return a 404 status code. Here's an updated code snippet:
```
File file = fileBasePath.toFile();
if (!file.exists()) {
    throw new FileNotFoundException("File not found");
}
resource = new UrlResource(file.toURI());
```

Ensure proper error handling in your controller:

Modify your controller to handle the FileNotFoundException separately and return a 404 status code. You can use a try-catch block to achieve this:

try {
    // ... Your existing code to create and return the resource
} catch (FileNotFoundException e) {
    throw new ResponseStatusException(HttpStatus.NOT_FOUND, "File not found", e);
} catch (Exception e) {
    throw new ResponseStatusException(HttpStatus.INTERNAL_SERVER_ERROR, "Internal Server Error", e);
}

With these modifications, when a requested file does not exist, your code will throw a FileNotFoundException, and Spring will handle it as a 404 error, returning the appropriate status code and message. Other exceptions will be handled as internal server errors (status code 500) as you are currently doing.

英文:

I want to return a Zip file from the server.
For files that are present it works as expected, the file gets returned ans all is fine.
My issue is for files that do not exist.
Here I want to return an 404-Error, but currently a 500 is returned because the
"java.io.FileNotFoundException : URL [...] cannot be resolved in the file system for checking its content length" Exepction is not cought in the controller.

Here is my code for the controller:

@GetMapping(&quot;analysis/daily/{year}/{month}/{day}/{mode}&quot;)
public ResponseEntity&lt;Resource&gt; getDailyAnalysis(
@PathVariable(&quot;year&quot;) int year, 
@PathVariable(&quot;month&quot;) int month,
@PathVariable(&quot;day&quot;) int day, 
@PathVariable(&quot;mode&quot;) AnalysisSelection type) {
    try {
        Resource resource;
        Path fileBasePath = Path.of(&quot;Analysis&quot;, &quot;ZIP&quot;, &quot;Daily&quot;,
                String.valueOf(year),
                String.valueOf(month),
                String.valueOf(day));
        switch (type) {
            case ByItem -&gt; {
                fileBasePath = fileBasePath.resolve(&quot;SingleItemAnalysis.zip&quot;);
            }
            case ByAuthor -&gt; {
                fileBasePath = fileBasePath.resolve(&quot;Author.zip&quot;);
            }
            case ByType -&gt; {
                fileBasePath = fileBasePath.resolve(&quot;Type.zip&quot;);
            }
            case ByIndustry -&gt; {
                fileBasePath = fileBasePath.resolve(&quot;Industry.zip&quot;);
            }
            default -&gt; {
                throw new ResponseStatusException(HttpStatus.BAD_REQUEST);
            }
        }
        resource = new UrlResource(fileBasePath.toUri());
        return ResponseEntity.ok().contentType(MediaType.parseMediaType(&quot;application/zip&quot;))
                .header(HttpHeaders.CONTENT_DISPOSITION, &quot;attachment; filename=\&quot;&quot; + resource.getFilename() + &quot;\&quot;&quot;)
                .body(resource);
    } catch (Exception e) {
        //e.printStackTrace();
        throw new ResponseStatusException(HttpStatus.NOT_FOUND);
    }

}

Weirdly, the stack trace points towards the Spring Security JWT-Token implementation:
specifically this line: "filterChain.doFilter(request, response);"

@Override
protected void doFilterInternal(HttpServletRequest request, HttpServletResponse response, FilterChain filterChain) throws ServletException, IOException {
    String jwt = getJwtFromRequest(request);

    if (StringUtils.hasText(jwt) &amp;&amp; jwtTokenProvider.validateToken(jwt)) {
        String mail = jwtTokenProvider.getUserMailFromToken(jwt);
        UserDetails userDetails = appUserDetailedService.loadUserByUsername(mail);
        UsernamePasswordAuthenticationToken authentication = new UsernamePasswordAuthenticationToken(userDetails, null, userDetails.getAuthorities());

        authentication.setDetails(new WebAuthenticationDetailsSource().buildDetails(request));
        SecurityContextHolder.getContext().setAuthentication(authentication);
    }

    filterChain.doFilter(request, response);
}

Here is the entire Stack Trace:


java.io.FileNotFoundException: URL [file:/C:/Users/walter/Documents/digitales2go/backend/Analysis/ZIP/Daily/2023/7/18/Author.zip] cannot be resolved in the file system for checking its content length
at org.springframework.core.io.AbstractFileResolvingResource.contentLength(AbstractFileResolvingResource.java:240)                                                                             
at org.springframework.http.converter.ResourceHttpMessageConverter.getContentLength(ResourceHttpMessageConverter.java:121)
at org.springframework.http.converter.ResourceHttpMessageConverter.getContentLength(ResourceHttpMessageConverter.java:45)
at org.springframework.http.converter.AbstractHttpMessageConverter.addDefaultHeaders(AbstractHttpMessageConverter.java:260)
at org.springframework.http.converter.AbstractHttpMessageConverter.write(AbstractHttpMessageConverter.java:211)
at org.springframework.web.servlet.mvc.method.annotation.AbstractMessageConverterMethodProcessor.writeWithMessageConverters(AbstractMessageConverterMethodProcessor.java:293)
at org.springframework.web.servlet.mvc.method.annotation.HttpEntityMethodProcessor.handleReturnValue(HttpEntityMethodProcessor.java:219)
at org.springframework.web.method.support.HandlerMethodReturnValueHandlerComposite.handleReturnValue(HandlerMethodReturnValueHandlerComposite.java:78)
at org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:135)
at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandlerMethod(RequestMappingHandlerAdapter.java:895)
at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:808)
at org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:87)
at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:1067)
at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:963)
at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:1006)
at org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:898)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:655)
at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:883)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:764)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:227)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:162)
at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:53)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:189)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:162)
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:111)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:189)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:162)
at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:327)
at org.springframework.security.web.access.intercept.FilterSecurityInterceptor.invoke(FilterSecurityInterceptor.java:115)
at org.springframework.security.web.access.intercept.FilterSecurityInterceptor.doFilter(FilterSecurityInterceptor.java:81)
at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:336)
at org.springframework.security.web.access.ExceptionTranslationFilter.doFilter(ExceptionTranslationFilter.java:122)
at org.springframework.security.web.access.ExceptionTranslationFilter.doFilter(ExceptionTranslationFilter.java:116)
at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:336)
at org.springframework.security.web.session.SessionManagementFilter.doFilter(SessionManagementFilter.java:126)
at org.springframework.security.web.session.SessionManagementFilter.doFilter(SessionManagementFilter.java:81)
at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:336)
at org.springframework.security.web.authentication.AnonymousAuthenticationFilter.doFilter(AnonymousAuthenticationFilter.java:109)
at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:336)
at org.springframework.security.web.servletapi.SecurityContextHolderAwareRequestFilter.doFilter(SecurityContextHolderAwareRequestFilter.java:149)
at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:336)
at org.springframework.security.web.savedrequest.RequestCacheAwareFilter.doFilter(RequestCacheAwareFilter.java:63)
at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:336)
at de.myProject.security.jwt.JwtAuthenticationFilter.doFilterInternal(JwtAuthenticationFilter.java:40)
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:117)
at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:336)
at org.springframework.security.web.authentication.logout.LogoutFilter.doFilter(LogoutFilter.java:103)
at org.springframework.security.web.authentication.logout.LogoutFilter.doFilter(LogoutFilter.java:89)
at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:336)
at org.springframework.web.filter.CorsFilter.doFilterInternal(CorsFilter.java:91)
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:117)
at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:336)
at org.springframework.security.web.header.HeaderWriterFilter.doHeadersAfter(HeaderWriterFilter.java:90)
at org.springframework.security.web.header.HeaderWriterFilter.doFilterInternal(HeaderWriterFilter.java:75)
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:117)
at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:336)
at org.springframework.security.web.context.SecurityContextPersistenceFilter.doFilter(SecurityContextPersistenceFilter.java:110)
at org.springframework.security.web.context.SecurityContextPersistenceFilter.doFilter(SecurityContextPersistenceFilter.java:80)
at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:336)
at org.springframework.security.web.context.request.async.WebAsyncManagerIntegrationFilter.doFilterInternal(WebAsyncManagerIntegrationFilter.java:55)
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:117)
at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:336)
at org.springframework.security.web.FilterChainProxy.doFilterInternal(FilterChainProxy.java:211)
at org.springframework.security.web.FilterChainProxy.doFilter(FilterChainProxy.java:183)
at org.springframework.web.filter.DelegatingFilterProxy.invokeDelegate(DelegatingFilterProxy.java:354)
at org.springframework.web.filter.DelegatingFilterProxy.doFilter(DelegatingFilterProxy.java:267)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:189)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:162)
at org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:201)
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:117)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:189)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:162)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:197)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:97)
at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:541)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:135)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:92)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:78)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:360)
at org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:399)
at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:65)
at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:890)
at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1743)
at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49)
at org.apache.tomcat.util.threads.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1191)
at org.apache.tomcat.util.threads.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:659)
at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
at java.base/java.lang.Thread.run(Thread.java:833)

Any ideas on how to make sure the proper HTTP error is returned?

See code above for details

答案1

得分: 0

尝试添加

...
default -> {
throw new ResponseStatusException(HttpStatus.BAD_REQUEST);
}
}
if (!Files.exists(path)) {
throw new FileNotFoundException()
}
resource = new UrlResource(fileBasePath.toUri());
...

英文:

Try to add

...        
default -&gt; {
throw new ResponseStatusException(HttpStatus.BAD_REQUEST);
}
}
if (!Files.exists(path)) {
throw new FileNotFoundException()
}
resource = new UrlResource(fileBasePath.toUri());
...

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