Spring Boot Multipart /相关的MIME类型支持

Z时代
2024-01-10
分类：问答

我需要消耗一个内容类型为多部分/相关的请求。请求将包含图像，json有效内容和二进制内容。我试图找到一些有关如何在Spring

Boot应用程序中处理此类请求的示例，我找到了一些有关如何处理multipart / form-data请求的参考，但与multipart

/相关的mime类型无关。

请求是这样的：

POST /upload
Content-Type: multipart/related; boundary="123asdf234"
--123asdf234
Content-Type: application/json; charset=UTF-8
Content-Disposition: form-data
{
    "json": "payload"
}
—-123asdf234
Content-Type: application/zip
Content-Disposition: file-data; filename="some.zip"; size=123456;
<binary-attachment-content>
—-123asdf234
Content-Type: image/png
Content-Disposition: file-data; filename="image1.png"; size=123456;
<binary-attachment-content>
—-123asdf234-—

有人可以告诉我如何在Spring Boot应用程序中处理此请求。我正在使用JaxRS。

回答：

为了解决这个问题，我首先参考了http://cxf.apache.org/docs/jax-rs-

multiparts.html，以正确理解与JAX-

RS相关的multipart / related。接下来，我参考了JAX-RS上的Spring文档，并选择使用Jersey依赖项来解决它。然后参考Jersey文档，我构建了以下测试项目：https

//github.com/ShawnTuatara/stackoverflow-38838926。主要示例是：

package ca.tuatara.stackoverflow;
import javax.ws.rs.Consumes;
import javax.ws.rs.POST;
import javax.ws.rs.Path;
import javax.ws.rs.Produces;
import javax.ws.rs.core.MediaType;
import org.glassfish.jersey.media.multipart.BodyPart;
import org.glassfish.jersey.media.multipart.FormDataParam;
import org.glassfish.jersey.media.multipart.MultiPart;
import org.glassfish.jersey.media.multipart.MultiPartFeature;
import org.glassfish.jersey.server.ResourceConfig;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.stereotype.Component;
@SpringBootApplication
public class Stackoverflow38838926Application {
    public static void main(String[] args) {
        SpringApplication.run(Stackoverflow38838926Application.class, args);
    }
    @Component
    public class JerseyConfig extends ResourceConfig {
        public JerseyConfig() {
            register(MultiPartFeature.class);
            register(MultipartHandler.class);
            register(MultipartPartsHandler.class);
        }
    }
    @Component
    @Path("/upload")
    @Consumes("multipart/*")
    @Produces("text/text")
    public class MultipartHandler {
        @POST
        public String upload(MultiPart request) {
            StringBuffer response = new StringBuffer();
            for (BodyPart part : request.getBodyParts()) {
                if (MediaType.APPLICATION_JSON_TYPE.isCompatible(part.getMediaType())) {
                    response.append(part.getEntityAs(JsonModel.class));
                } else if (MediaType.APPLICATION_XML_TYPE.isCompatible(part.getMediaType())) {
                    response.append(part.getEntityAs(XmlModel.class));
                }
                response.append(System.lineSeparator());
            }
            return response.toString();
        }
    }
    @Component
    @Path("/uploadParts")
    @Consumes("multipart/*")
    @Produces("text/text")
    public class MultipartPartsHandler {
        @POST
        public String upload(@FormDataParam("json") JsonModel json, @FormDataParam("xml") XmlModel xml) {
            return json + System.lineSeparator() + xml;
        }
    }
}