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本篇文章給大家分享的是有關(guān)利用Feign怎么實(shí)現(xiàn)一個跨服務(wù)文件上傳下載功能,小編覺得挺實(shí)用的,因此分享給大家學(xué)習(xí),希望大家閱讀完這篇文章后可以有所收獲,話不多說,跟著小編一起來看看吧。
1、跨服務(wù)文件上傳,目前feign不支持調(diào)用文件上傳接口,需要自行配置來滿足feign的調(diào)用方式
①.首先需要在pom文件里添加feign依賴
<dependency> <groupId>io.github.openfeign.form</groupId> <artifactId>feign-form-spring</artifactId> <version>3.2.2</version> </dependency> <dependency> <groupId>io.github.openfeign.form</groupId> <artifactId>feign-form</artifactId> <version>3.2.2</version> </dependency>
②.上傳的接口
@FeignClient(value = "fdn-storage", configuration = {FileFeignConfig.class}) public interface FileClient { String PREFIX_PATH = "/oss/files"; /** * 上傳存儲文件 * @param file * @return * @throws IOException */ @PostMapping(value = PREFIX_PATH + "/", consumes = MULTIPART_FORM_DATA_VALUE) FeignResult<FileEntity> save(@RequestPart(value = "file") MultipartFile file) throws IOException; }
③.添加配置來滿足feign的調(diào)用
@Configuration public class FileFeignConfig { @Autowired private ObjectFactory<HttpMessageConverters> messageConverters; @Bean @Primary @Scope("prototype") public Encoder feignEncoder() { return new SpringFormEncoder(new SpringEncoder(messageConverters)); } @Bean public feign.Logger.Level multipartLoggerLevel() { return feign.Logger.Level.FULL; } }
④.外部服務(wù)的controller層調(diào)用
public class TestController extends BaseRestController { @Autowired FileClient client; /** * 上傳文件 **/ @PostMapping(value = "/" , consumes = MULTIPART_FORM_DATA_VALUE) public FileEntity save(@RequestPart(value = "file") MultipartFile file) throws IOException { FileEntity fileEntity = client.save(file).getData(); return fileEntity; } }
到此位置就可以上傳成功了
2、跨服務(wù)的文件下載
①.下載的接口(也是寫在public interface FileClient),是用feign.Response來作為返回值的
/** * 下載文件 * @param id * @return * @throws IOException */ @GetMapping(value = PREFIX_PATH + "/{id}/data") Response download(@PathVariable("id") String id) throws IOException;
②.外部服務(wù)的controller層調(diào)用
/** *由id下載存儲的文件 */ @GetMapping(value = "/{id}/data") public void downloadFile(@PathVariable String id, HttpServletResponse servletResponse) throws IOException { Response response = client.download(id); Response.Body body = response.body(); for(Object key : response.headers().keySet()){ List<String> kList = (List)response.headers().get(key); for(String val : kList){ servletResponse.setHeader(StringUtils.toString(key), val); } } try(InputStream inputStream = body.asInputStream(); OutputStream outputStream = servletResponse.getOutputStream() ){ byte[] b = new byte[inputStream.available()]; inputStream.read(b); outputStream.write(b); outputStream.flush(); }catch (IOException e){ throw new RestException("IO流異常", e); } }
以上就是利用Feign怎么實(shí)現(xiàn)一個跨服務(wù)文件上傳下載功能,小編相信有部分知識點(diǎn)可能是我們?nèi)粘9ぷ鲿姷交蛴玫降?。希望你能通過這篇文章學(xué)到更多知識。更多詳情敬請關(guān)注億速云行業(yè)資訊頻道。
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