Question

用例定义了使用OpenLiberty 19.0.0.5在Java中下载几个文件以及一些json

实际上，在OpenLiberty中，可以将IMultipartBody用作REST服务的参数。我可以使用文件以及json。但是，当要发送多部分消息时，我会遇到各种各样的问题。

@POST
@Consumes("multipart/form-data")
@Produces("multipart/form-data")
public Response postFormData(IMultipartBody multipartBody) {
   public Response postFormData(IMultipartBody multipartBody) {
        FileOutputStream outputStream=null;
        List<IAttachment> attachments = multipartBody.getAllAttachments();

        InputStream stream = null;
        String fileKey = null;
        FileOutputStream fileOutputStream = null;
        for (Iterator<IAttachment> it = attachments.iterator(); it.hasNext(); ) {
            IAttachment attachment = it.next();
            if (attachment == null) {
                continue;
            }
            DataHandler dataHandler = attachment.getDataHandler();
            try {
                stream = dataHandler.getInputStream();
            } catch (IOException e) {
                e.printStackTrace();
            }
            MultivaluedMap<String, String> map = attachment.getHeaders();

            String contentDisposition = map.getFirst("Content-Disposition");
            if (contentDisposition != null && contentDisposition.toLowerCase().contains("filename=")) {
               <write stream to file and do work>
               <how can I send back a file using multipartBody>
            }

        }


        return Response.ok(multipartBody).build();
    }
}

我想发回mulitpartBody中的流，但找不到允许我这样做的任何方法。

当我使用SOAPUI测试服务并将文件附加到请求并用作媒体类型multipart/form-data时，我得到以下响应：

HTTP/1.1 200 OK
X-Powered-By: Servlet/4.0
Content-Type: multipart/form-data; boundary="uuid:082bc4df-b829-4ec0-80d1-6a3c059b88a7"
Date: Mon, 17 Jun 2019 07:52:15 GMT
Content-Language: en-US
Content-Length: 325


--uuid:082bc4df-b829-4ec0-80d1-6a3c059b88a7
Content-Type: application/octet-stream;name=global-groovy.log
Content-Transfer-Encoding: binary
Content-ID: <root.message@cxf.apache.org>
Content-Disposition: form-data; name="global-groovy.log"; filename="global-groovy.log"


--uuid:082bc4df-b829-4ec0-80d1-6a3c059b88a7--

因此响应返回但没有文件，我该如何发回文件？

有没有一种已知的方法将多部分消息用作响应？

我找到了另一种使用"multipart/mixed"数据进行发送的方式，但是我不确定这是否是开放自由社区的意图：

   @POST
    @Consumes("multipart/form-data")
    @Produces("multipart/mixed")
    public Response postFormData(IMultipartBody multipartBody) {
        FileOutputStream outputStream=null;
        List<IAttachment> attachments = multipartBody.getAllAttachments();

        InputStream stream = null;
        String fileKey = null;
        FileOutputStream fileOutputStream = null;
        for (Iterator<IAttachment> it = attachments.iterator(); it.hasNext(); ) {
            IAttachment attachment = it.next();
            if (attachment == null) {
                continue;
            }
            DataHandler dataHandler = attachment.getDataHandler();
            try {
                stream = dataHandler.getInputStream();
            } catch (IOException e) {
                e.printStackTrace();
            }
            MultivaluedMap<String, String> map = attachment.getHeaders();

            String contentDisposition = map.getFirst("Content-Disposition");
            if (contentDisposition != null && contentDisposition.toLowerCase().contains("filename=")) {
                // <write the file and process it>

            }
        }

        //https://cwiki.apache.org/confluence/display/CXF20DOC/JAX-RS+Multiparts#JAX-RSMultiparts-Writingattachments

        Map<String, Object> map = new LinkedHashMap<>();     
        map.put("application/json", "{\"menu\": {\"id\": \"file\",\"value\": \"File\"}}");

        try {
            final File file = new File("myFile");
            map.put("application/octet-stream", Files.newInputStream(file.toPath()));
        } catch (IOException e) {
            e.printStackTrace();
        }

        return Response.ok(map).build();
    }
}

有人暗示吗？

如何使用OpenLiberty的一个请求下载json的多个文件

0 个答案: