使用改型1.8.0的多部分请求不起作用

Question

我有像4天，试图提出一个多部分的请求使用改型1.8.0在android与任何成功。我的界面如下所示

@Multipart
@POST("/posts/add.json") 
void addComment(
  @Part("id") String id,
  @Part("post[body]") String body,
  @Part("post[attachment]") TypedFile attachment,
  Callback<Map<String, String>> callback );

Parameters: {"id"=># <File:/var/folders/z0/0ggjvvfj4t1fdsvbxf3lc9pw0000gn/T/RackMultipart9853-0>, "post"=>{"body"=>#<File:/var/folders/z0/0ggjvvfj4t1fdsvbxf3lc9pw0000gn/T/RackMultipart9853-1>, "attachment"=>#<File:/var/folders/z0/0ggjvvfj4t1fdsvbxf3lc9pw0000gn/T/RackMultipart9853-2>}, "controller"=>"posts", "action"=>"add", "format"=>"json"}

 02-06 15:01:16.213    32545-822/com.myapp D/Retrofit﹕ --fe41634b-6826-4ee4-95cb-65efb0ca66c2
Content-Disposition: form-data; name="id"
Content-Type: text/plain; charset=UTF-8
Content-Length: 3
Content-Transfer-Encoding: binary
189
--fe41634b-6826-4ee4-95cb-65efb0ca66c2
Content-Disposition: form-data; name="post[body]"
Content-Type: text/plain; charset=UTF-8
Content-Length: 4
Content-Transfer-Encoding: binary
test
--fe41634b-6826-4ee4-95cb-65efb0ca66c2
Content-Disposition: form-data; name="post[attachment]"; filename="IMG_20140203_144358.jpg"
Content-Type: image/jpg
Content-Length: 1615460
Content-Transfer-Encoding: binary
����/�Exif����MM��*���������

Content-Disposition: form-data; name="id"
Content-Type: text/plain; charset=US-ASCII
Content-Transfer-Encoding: 8bit

Content-Disposition: form-data; name=“post[body]"
Content-Type: text/plain; charset=US-ASCII
Content-Transfer-Encoding: 8bit

Content-Disposition: form-data; name=“post[attachment]"; filename="images.jpg"
Content-Type: image/jpg
Content-Transfer-Encoding: binary

最后，我决定这样做，其实我的答案很接近@lazypig，这是一个很好的指导方针

我唯一改变的是他的类“ByteArrayTypedOutput”

我创建了一个名为“MultipartTypedOutputCustom”的类http://pastie.org/10549360

@POST("/posts/add.json")
    void addComment(@Body MultipartTypedOutputCustom parts,
                    Callback<Map<String, String>> callback);

//Properties
private PostsRetrofitAPI mApi;
...

    @Override
        public void addComment(ServiceResponseHandler<Map<String, String>> handler, String id, String body, TypedFile attachment) {
           MultipartTypedOutputCustom parts = new MultipartTypedOutputCustom();
           parts.addPart("id", new TypedString(id));
           parts.addPart("post[body]", new TypedString(body));
           parts.addPart("post[attachment]", attachment);
    objectRetrofitCallback= new ObjectRetrofitCallback(handler, ServerError.class, ClientError.class);
            mApi.addComment(parts, objectRetrofitCallback);
        }

Answer 1

如果您在http://square.github.io/retrofit/上看到这些示例，那么“id”和“part[body]”参数的对象类型必须是TypedString而不是string。TypedString设置适当的MIME类型，并将其转换为字节：

https://github.com/square/retrofit/blob/master/retrofit/src/main/java/retrofit/mime/typedstring.java