java - 似乎有多个层次的多方性？

Question

我遇到了一个客户的问题，该客户正在使用一些疯狂的东西(它可能并不疯狂，我真的是对我自己不熟悉；))ruby rails 插件来处理带有附加数据的图像的上传。他们说服务器正在寻找信息的方式是

{
   "objectname"{
      "field"=>"value"
      "field"=>"value"
      "photo"=>#<ActionDispatch::Http::UploadedFile:0x00000004864fd0 @original_filename="avatar.png", @content_type="image/png", 
      @headers="Content-Disposition: form-data; name=\"aPhoto\"; filename=\"avatar.png\"\r\nContent-Type: image/png\r\n", 
      @tempfile=#<File:/tmp/RackMultipart20140211-8-1456165191981>
   }
}

问题是使用 MultiPartEntity(这是他们说要使用的)我所能做的就是让服务器看到这个

{
          "field"=>"value"
          "field"=>"value"
          "photo"=>#<ActionDispatch::Http::UploadedFile:0x00000004864fd0 @original_filename="avatar.png", @content_type="image/png", 
          @headers="Content-Disposition: form-data; name=\"aPhoto\"; filename=\"avatar.png\"\r\nContent-Type: image/png\r\n", 
          @tempfile=#<File:/tmp/RackMultipart20140211-8-1456165191981>
}

事实证明，额外的包裹层很困难。这是我的方法，我怎样才能在那个键“objectname”下实现那个额外的层？

MultipartEntity multiPartEntity = new MultipartEntity(HttpMultipartMode.STRICT, null, Charset.forName("UTF-8"));

        ByteArrayBody imageByteArrayBody = new ByteArrayBody(imageBytes, "image/png", "avatar.png");
        FormBodyPart imageFormBodyPart = new FormBodyPart("photo", imageByteArrayBody);
        // sanity checks to make sure the headers are right
        imageFormBodyPart.addField("Content-Disposition", "form-data; name=\"aPhoto\"");
        imageFormBodyPart.addField("name", "aPhoto");
        imageFormBodyPart.addField("filename", "avatar.png");
        imageFormBodyPart.addField("Content-Type", "image/png");
        // add the image body part to the multipart entity
        multiPartEntity.addPart(imageFormBodyPart);
        // add customer data
        Map<String, String> customerMap = user.getUserMap();
        // loop through the fields
        for (Map.Entry<String, String> entry : customerMap.entrySet())
        {
            // create a new form part with the key as the name and the value as the value
            FormBodyPart body = new FormBodyPart(entry.getKey(), new StringBody(entry.getValue()));
            // sanity checking the headers are right
            body.addField("Content-Disposition", "form-data; name=\"" + entry.getKey() + "\"");
            body.addField(entry.getKey(), entry.getValue());
            // add the part to the multipart entity
            multiPartEntity.addPart(body);
        }

        postRequest.setEntity(multiPartEntity);
        postRequest.setHeader(KEY_AUTHORIZATION, VALUE_AUTHORIZATION);
        HttpResponse response = httpClient.execute(postRequest);

Answer 1

我知道这有点晚了。但我最近偶然发现了一个类似的问题。对我有用的解决方案是调整 rails 端的代码以删除额外的参数包装。根据我的研究，MultipartEntity

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