带功能Webflux的文件上传

我正在使用“路由器Kotlin DSL”迁移到Spring WebFlux（和Spring Boot）的功能变体。现在我需要一些MIME类型为multipart/form-data而不是PUT与application/json一些数据。带功能Webflux的文件上传

当我定义了一个简单的路由器功能和处理这样我得到下面的堆栈跟踪：

fun routes(handler: MultimediaHandler) = router { 
    (accept(MediaType.MULTIPART_FORM_DATA) and "/multimedia").nest { 
     PUT("/{id}", handler::upload) 
    } 
} 
class MultimediaHandler { 
    fun upload(request: ServerRequest): Mono<ServerResponse> { 
     val id = request.pathVariable("id") 
     return noContent().build() 
    } 
}

堆栈跟踪：

13:43:29.713 ERROR [i.u.request] [XNIO-1 I/O-3] UT005071: Undertow request failed HttpServerExchange{ PUT /multimedia/00000000-0000-0000-0000-000000000 
001 request {Connection=[Keep-Alive], Accept-Encoding=[gzip,deflate], Content-Length=[1672], Content-Type=[multipart/form-data; boundary=-mJAzUqZoGk2nc 
N1Rch4O4-KGbTExkAmQ7A], User-Agent=[Apache-HttpClient/4.5.2 (Java/1.8.0_144)], Host=[localhost:8444]} response {}} 
java.lang.IllegalStateException: No multipart HttpMessageReader. 
     at org.springframework.web.server.adapter.DefaultServerWebExchange.lambda$initMultipartData$3(DefaultServerWebExchange.java:144) ~[spring-web-5.0.0.RC3.jar:5.0.0.RC3] 
     at java.util.Optional.orElseThrow(Optional.java:290) ~[?:1.8.0_144] 
     at org.springframework.web.server.adapter.DefaultServerWebExchange.initMultipartData(DefaultServerWebExchange.java:144) ~[spring-web-5.0.0.RC3.jar:5.0.0.RC3] 
     at org.springframework.web.server.adapter.DefaultServerWebExchange.<init>(DefaultServerWebExchange.java:109) ~[spring-web-5.0.0.RC3.jar:5.0.0.RC3] 
     at org.springframework.web.server.adapter.HttpWebHandlerAdapter.createExchange(HttpWebHandlerAdapter.java:167) ~[spring-web-5.0.0.RC3.jar:5.0.0.RC3] 
     at org.springframework.web.server.adapter.HttpWebHandlerAdapter.handle(HttpWebHandlerAdapter.java:156) ~[spring-web-5.0.0.RC3.jar:5.0.0.RC3] 
     at org.springframework.http.server.reactive.UndertowHttpHandlerAdapter.handleRequest(UndertowHttpHandlerAdapter.java:71) ~[spring-web-5.0.0.RC3.jar:5.0.0.RC3] 
     at io.undertow.server.Connectors.executeRootHandler(Connectors.java:332) [undertow-core-1.4.19.Final.jar:1.4.19.Final] 
     at io.undertow.server.protocol.http.HttpReadListener.handleEventWithNoRunningRequest(HttpReadListener.java:254) [undertow-core-1.4.19.Final.jar:1.4.19.Final] 
     at io.undertow.server.protocol.http.HttpReadListener.handleEvent(HttpReadListener.java:136) [undertow-core-1.4.19.Final.jar:1.4.19.Final] 
     at io.undertow.server.protocol.http.HttpOpenListener.handleEvent(HttpOpenListener.java:148) [undertow-core-1.4.19.Final.jar:1.4.19.Final] 
     at io.undertow.server.protocol.http.AlpnOpenListener$AlpnConnectionListener.handleEvent(AlpnOpenListener.java:357) [undertow-core-1.4.19.Final.jar:1.4.19.Final] 
     at io.undertow.server.protocol.http.AlpnOpenListener$AlpnConnectionListener.handleEvent(AlpnOpenListener.java:308) [undertow-core-1.4.19.Final.jar:1.4.19.Final] 
     at org.xnio.ChannelListeners.invokeChannelListener(ChannelListeners.java:92) [xnio-api-3.5.1.Final.jar:3.5.1.Final] 
     at org.xnio.conduits.ReadReadyHandler$ChannelListenerHandler.readReady(ReadReadyHandler.java:66) [xnio-api-3.5.1.Final.jar:3.5.1.Final] 
     at io.undertow.protocols.ssl.SslConduit$SslReadReadyHandler.readReady(SslConduit.java:1140) [undertow-core-1.4.19.Final.jar:1.4.19.Final] 
     at org.xnio.nio.NioSocketConduit.handleReady(NioSocketConduit.java:89) [xnio-nio-3.5.1.Final.jar:3.5.1.Final] 
     at org.xnio.nio.WorkerThread.run(WorkerThread.java:571) [xnio-nio-3.5.1.Final.jar:3.5.1.Final]

来源

2017-08-31 Juergen Zimmermann

你有你的类路径下的依赖？ Spring Framework需要这个解析多部分请求。

<dependency> 
    <groupId>org.synchronoss.cloud</groupId> 
    <artifactId>nio-multipart-parser</artifactId> 
    <version>...</version> 
</dependency>

来源

2017-09-01 07:44:42

谢谢，现在错误消失了。仅供参考，只要我在Spring MVC中使用Spring Cloud和Spring Boot，就不需要这种依赖关系。我只用了@RequestParam的MultipartFile。 –

这是因为它使用标准的servlet多部分支持。这里没有这样的事情。 –

带功能Webflux的文件上传

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