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Feign調(diào)用傳輸文件異常的解決

更新時(shí)間：2021年06月24日 10:32:38 作者：老飛pfy

這篇文章主要介紹了Feign調(diào)用傳輸文件異常的解決方案，具有很好的參考價(jià)值，希望對(duì)大家有所幫助。如有錯(cuò)誤或未考慮完全的地方，望不吝賜教

1. Current request is not a multipart request

feign接口參數(shù)使用 @RequestPart 而非 @RequestParam, 同時(shí)需要指定consumes,比如這樣：

@PostMapping(value = "/upload",consumes = MediaType.MULTIPART_FORM_DATA_VALUE)
    Result<FileStorage> upload(@RequestPart(value = "file") MultipartFile file);

2. Feign failed and no fallback

這是hystrix導(dǎo)致，關(guān)閉feign熔斷，或者延長(zhǎng)熔斷的超時(shí)時(shí)間,我簡(jiǎn)單粗暴的直接關(guān)了

3.Read timed out executing POST for “xxx”

配置了hystrix還不行，或者延長(zhǎng)ribbon的超時(shí)時(shí)間，參考了Feign超時(shí)問(wèn)題的辦法，簡(jiǎn)單來(lái)說(shuō)就是feign經(jīng)過(guò)了ribbonn和hystrix兩級(jí)調(diào)用，而且都有一個(gè)默認(rèn)的超時(shí)時(shí)間，延長(zhǎng)超時(shí)時(shí)間就好了

spring:
  servlet:
    context-path: /farm
  application:
    name: farm
  profiles:
    active: dev
  main:
    allow-bean-definition-overriding: true
eureka:
  client:
    service-url:
      defaultZone: http://127.0.0.1:7001/eureka
  instance:
    prefer-ip-address: true
#關(guān)閉feign熔斷
feign:
  hystrix:
    enabled: false
#開(kāi)啟熔斷，關(guān)閉熔斷超時(shí)或延長(zhǎng)調(diào)用超時(shí)時(shí)間
#hystrix:
#  command:
#    default:
#      execution:
#        timeout:
#          enabled: false
#        isolation:
#          thread:
#            timeoutInMilliseconds: 30000
#延長(zhǎng)ribbon超時(shí)時(shí)間
ribbon:
  ReadTimeout: 30000
  ConnectTimeout: 30000

通過(guò)Feign上傳文件（踩坑）

引入依賴：

        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-openfeign</artifactId>
        </dependency>

服務(wù)提供者：

@RestController
@RequestMapping("/file")
public interface FileUploadService {
 
    @RequestMapping(value = "/uploadFile", method = RequestMethod.POST, consumes = MULTIPART_FORM_DATA_VALUE)
    CommonResult<String> uploadFile(@RequestPart("file") MultipartFile file,
                                    @RequestParam(value = "containerName", required = false) String containerName
}

具體實(shí)現(xiàn)不是重點(diǎn)……根據(jù)你的實(shí)際情況去完成……

服務(wù)調(diào)用者：

@RestController
@FeignClient(value = "XXXXXXXX", configuration = FileUploadServiceFeign.ClientConfiguration.class)
@RequestMapping("/file")
public interface FileUploadServiceFeign extends FileUploadService {
     
    /**
     * 配置類
     */
    class ClientConfiguration {
        /**
         * 此處注入的是： ObjectFactory<HttpMessageConverters>
         */
        @Autowired
        private ObjectFactory<HttpMessageConverters> messageConverters;
 
        @Bean
        public Encoder feignEncoder() {
            return new SpringFormEncoder(new SpringEncoder(messageConverters));
        }
    }
}

這樣就行了……

需要注意的是：

在服務(wù)調(diào)用者那層的MultipartFile的value要跟服務(wù)提供者的@RequestPart中的value值一樣。不然它會(huì)拋出400異常?。?！