Spring WebFlux 文件上传:分段上传不支持媒体类型 415
Spring WebFlux File Upload: Unsupported Media Type 415 with Multipart upload
我 运行 遇到一些使用 spring 的反应框架处理文件上传的问题。我想我正在关注文档,但无法摆脱这个 415
/ Unsupported Media Type
问题。
我的控制器如下所示(根据此处的示例:https://docs.spring.io/spring/docs/current/spring-framework-reference/web-reactive.html#webflux-multipart-forms)
package com.test.controllers;
import reactor.core.publisher.Flux;
import org.springframework.http.MediaType;
import org.springframework.http.codec.multipart.FilePart;
import org.springframework.http.codec.multipart.Part;
import org.springframework.web.bind.annotation.RequestBody;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.bind.annotation.RestController;
@RestController
public class TestController {
@RequestMapping(value = "/upload", method = RequestMethod.POST, consumes = MediaType.MULTIPART_FORM_DATA_VALUE, produces = MediaType.APPLICATION_JSON_VALUE)
public Flux<String> uploadHandler(@RequestBody Flux<Part> parts) {
return parts
.filter(part -> part instanceof FilePart)
.ofType(FilePart.class)
.log()
.flatMap(p -> Flux.just(p.filename()));
}
}
虽然发布到这个端点,总是给我相同的输出:
curl -X POST -F "data=@basic.ppt" http://localhost:8080/upload
---
"Unsupported Media Type","message":"Content type 'multipart/form-data;boundary=------------------------537139718d79303c;charset=UTF-8' not supported"
我也尝试过使用 @RequestPart("data")
,但得到了类似的 Unsupported Media Type
错误,尽管是文件的内容类型。
似乎 Spring 在将它们转换为 Part
时遇到了问题。?我被困住了——感谢任何帮助!
嗯,这不是您问题的直接答案,因为我使用的是功能端点,但我希望它能以某种方式帮助您。
import org.springframework.context.annotation.Bean;
import org.springframework.http.codec.multipart.FilePart;
import org.springframework.http.codec.multipart.Part;
import org.springframework.stereotype.Controller;
import org.springframework.web.reactive.function.BodyExtractors;
import org.springframework.web.reactive.function.server.HandlerFunction;
import org.springframework.web.reactive.function.server.RouterFunction;
import org.springframework.web.reactive.function.server.ServerResponse;
import java.io.File;
import java.util.Map;
import static org.springframework.web.reactive.function.BodyInserters.fromObject;
import static org.springframework.web.reactive.function.server.RequestPredicates.POST;
import static org.springframework.web.reactive.function.server.RequestPredicates.path;
import static org.springframework.web.reactive.function.server.RouterFunctions.nest;
import static org.springframework.web.reactive.function.server.RouterFunctions.route;
@Controller
public class FileUploadController {
@Bean
RouterFunction<ServerResponse> apiRoutes() {
return nest(path("/api"),
route(POST("/upload"), fileUpload()));
}
private HandlerFunction<ServerResponse> fileUpload() {
return request -> {
return request.body(BodyExtractors.toMultipartData()).flatMap(parts -> {
Map<String, Part> map = parts.toSingleValueMap();
final FilePart filePart = (FilePart) map.get("file");
final String dir = "C:\JDeveloper\mywork\Spring\SpringTest\webflux-file-upload\uploaded";
filePart.transferTo(new File(dir + "/" + filePart.filename()));
return ServerResponse.ok().body(fromObject("ok, file uploaded"));
}
);
};
}
}
您可以像这样使用 curl 上传文件:
curl -F "file=@C:\Users\Wojtek\Desktop\img-5081775796112008742.jpg" localhost:8080/api/fileupload
感谢@kojot 的回答,但在这种情况下,我发现问题是除了 spring-webflux
之外还暂时包含了 spring-webmvc
。您的解决方案可能也有效,但我想坚持使用 Controller 风格,所以最终从我的 build.gradle
:
中强行排除了 spring-webmvc
configurations {
implementation {
exclude group: 'org.springframework', module: 'spring-webmvc'
}
}
之后它按照记录工作。
我 运行 遇到一些使用 spring 的反应框架处理文件上传的问题。我想我正在关注文档,但无法摆脱这个 415
/ Unsupported Media Type
问题。
我的控制器如下所示(根据此处的示例:https://docs.spring.io/spring/docs/current/spring-framework-reference/web-reactive.html#webflux-multipart-forms)
package com.test.controllers;
import reactor.core.publisher.Flux;
import org.springframework.http.MediaType;
import org.springframework.http.codec.multipart.FilePart;
import org.springframework.http.codec.multipart.Part;
import org.springframework.web.bind.annotation.RequestBody;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.bind.annotation.RestController;
@RestController
public class TestController {
@RequestMapping(value = "/upload", method = RequestMethod.POST, consumes = MediaType.MULTIPART_FORM_DATA_VALUE, produces = MediaType.APPLICATION_JSON_VALUE)
public Flux<String> uploadHandler(@RequestBody Flux<Part> parts) {
return parts
.filter(part -> part instanceof FilePart)
.ofType(FilePart.class)
.log()
.flatMap(p -> Flux.just(p.filename()));
}
}
虽然发布到这个端点,总是给我相同的输出:
curl -X POST -F "data=@basic.ppt" http://localhost:8080/upload
---
"Unsupported Media Type","message":"Content type 'multipart/form-data;boundary=------------------------537139718d79303c;charset=UTF-8' not supported"
我也尝试过使用 @RequestPart("data")
,但得到了类似的 Unsupported Media Type
错误,尽管是文件的内容类型。
似乎 Spring 在将它们转换为 Part
时遇到了问题。?我被困住了——感谢任何帮助!
嗯,这不是您问题的直接答案,因为我使用的是功能端点,但我希望它能以某种方式帮助您。
import org.springframework.context.annotation.Bean;
import org.springframework.http.codec.multipart.FilePart;
import org.springframework.http.codec.multipart.Part;
import org.springframework.stereotype.Controller;
import org.springframework.web.reactive.function.BodyExtractors;
import org.springframework.web.reactive.function.server.HandlerFunction;
import org.springframework.web.reactive.function.server.RouterFunction;
import org.springframework.web.reactive.function.server.ServerResponse;
import java.io.File;
import java.util.Map;
import static org.springframework.web.reactive.function.BodyInserters.fromObject;
import static org.springframework.web.reactive.function.server.RequestPredicates.POST;
import static org.springframework.web.reactive.function.server.RequestPredicates.path;
import static org.springframework.web.reactive.function.server.RouterFunctions.nest;
import static org.springframework.web.reactive.function.server.RouterFunctions.route;
@Controller
public class FileUploadController {
@Bean
RouterFunction<ServerResponse> apiRoutes() {
return nest(path("/api"),
route(POST("/upload"), fileUpload()));
}
private HandlerFunction<ServerResponse> fileUpload() {
return request -> {
return request.body(BodyExtractors.toMultipartData()).flatMap(parts -> {
Map<String, Part> map = parts.toSingleValueMap();
final FilePart filePart = (FilePart) map.get("file");
final String dir = "C:\JDeveloper\mywork\Spring\SpringTest\webflux-file-upload\uploaded";
filePart.transferTo(new File(dir + "/" + filePart.filename()));
return ServerResponse.ok().body(fromObject("ok, file uploaded"));
}
);
};
}
}
您可以像这样使用 curl 上传文件:
curl -F "file=@C:\Users\Wojtek\Desktop\img-5081775796112008742.jpg" localhost:8080/api/fileupload
感谢@kojot 的回答,但在这种情况下,我发现问题是除了 spring-webflux
之外还暂时包含了 spring-webmvc
。您的解决方案可能也有效,但我想坚持使用 Controller 风格,所以最终从我的 build.gradle
:
spring-webmvc
configurations {
implementation {
exclude group: 'org.springframework', module: 'spring-webmvc'
}
}
之后它按照记录工作。