java - Spring MVC StreamingResponseBody 返回分块文件

Question

我遇到了使用 springMVC StreamingResponseBody 返回视频的问题。我从服务器获取的视频中断了。你们能给我一个提示吗？

视频文件被分块了

我的 Controller :

    @RestController
    @RequestMapping("/rest/videos")
    public class VideoController {
        private String videoLocation = "videos";
        private ConcurrentHashMap<String, File> videos = new ConcurrentHashMap<String, File>();

        @PostConstruct
        public void init() {
            ClassLoader classloader = Thread.currentThread().getContextClassLoader();
            File dir = new File(classloader.getResource(videoLocation).getPath());
            System.out.println(dir);
            videos.clear();
            videos.putAll(Arrays.asList(dir.listFiles()).stream()
                    .collect(Collectors.toMap((f) -> {
                        String name = ((File) f).getName();
                        return name;
                    }, (f) -> (File) f)));
        }

        @RequestMapping(method = RequestMethod.GET, value = "/{video:.+}")
        @PreAuthorize("permitAll")
        public StreamingResponseBody stream(@PathVariable String video)
                throws FileNotFoundException {
            File videoFile = videos.get(video);
            final InputStream videoFileStream = new FileInputStream(videoFile);
            return (os) -> {
                readAndWrite(videoFileStream, os);
            };
        }

        @RequestMapping(method = RequestMethod.GET)
        @PreAuthorize("permitAll")
        public Set<String> list() {
            System.out.println(videos.keySet());
            return videos.keySet();
        }

        private void readAndWrite(final InputStream is, OutputStream os)
                throws IOException {
            byte[] data = new byte[2048];
            int read = 0;
            int i = 0;
            while ((read = is.read(data)) > 0) {
                os.write(data, 0, read);
                System.out.println("buffer Number "+i++);
            }
            os.flush();
        }
    }

我的配置:

@Configuration
public class AsyncWebConfig extends WebMvcConfigurerAdapter {
    @Override
    public void configureAsyncSupport(AsyncSupportConfigurer configurer) {
        System.out.println("My AsyncSupportConfigurer!");
        configurer.setDefaultTimeout(-1);
        configurer.setTaskExecutor(asyncTaskExecutor());
    }

    @Bean
    public AsyncTaskExecutor asyncTaskExecutor() {
        System.out.println("My AsyncSupportConfigurer!!~");
        return new SimpleAsyncTaskExecutor("async");
    }
}

我的 web.xml

       <context-param>
            <param-name>contextConfigLocation</param-name>
            <param-value>classpath:spring/business-config.xml</param-value>
        </context-param>

        <listener>
            <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
        </listener>

        <servlet>
            <servlet-name>mvc-dispatcher</servlet-name>
            <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
            <async-supported>true</async-supported>
        </servlet>

        <servlet-mapping>
            <servlet-name>mvc-dispatcher</servlet-name>
            <url-pattern>/</url-pattern>
        </servlet-mapping>
    </web-app>

我的调度程序 servlet

    <context:component-scan base-package="com.BackEnd.restful.mvc"/>

    <mvc:resources mapping="/app/**" location="/app/build/"/>

    <mvc:annotation-driven/>

    <bean id="jspViewResolver" class="org.springframework.web.servlet.view.InternalResourceViewResolver">
        <property name="prefix" value="/WEB-INF/jsp/"/>
        <property name="suffix" value=".jsp"/>
    </bean>
    <security:global-method-security pre-post-annotations="enabled">
        <security:protect-pointcut expression="execution(* com.BackEnd.restful.mvc.*.*(..))"
                                   access="ROLE_DUMMY"/>
    </security:global-method-security>

错误日志:

buffer Number 2691
buffer Number 2692
buffer Number 2693
buffer Number 2694
buffer Number 2695
buffer Number 2696
buffer Number 2697
buffer Number 2698
buffer Number 2699
buffer Number 2700
Aug 15, 2016 10:36:08 PM org.springframework.web.context.request.async.WebAsyncManager setConcurrentResultAndDispatch
SEVERE: Could not complete async processing due to timeout or network error
buffer Number 0
buffer Number 1
buffer Number 2
buffer Number 3
buffer Number 4
buffer Number 5
buffer Number 6
buffer Number 7
buffer Number 8
buffer Number 9
buffer Number 10
buffer Number 11
buffer Number 12

Answer 1

调整容器服务器的异步超时应该可以解决问题