将图像从Android(使用Android异步Http客户端)上传到rails服务器(使用回形针)

Question

我正在尝试通过http post方法从android设备上传图像文件到rails服务器.但发布图像不起作用.更具体地说,post参数(包括图像文件)似乎没有正确发送.

我正在使用Android异步Http客户端(http://loopj.com/android-async-http/)从android发布图像,发布图像的代码是这样的.

public static void postImage(){
    RequestParams params = new RequestParams();
    params.put("picture[name]","MyPictureName");
    params.put("picture[image]",File(Environment.getExternalStorageDirectory().getPath() + "/Pictures/CameraApp/test.jpg"));
    AsyncHttpClient client = new AsyncHttpClient();
    client.post("http://x.x.x.x:3000/pictures/", params, new AsyncHttpResponseHandler() {
        @Override
        public void onSuccess(String response) {
            Log.w("async", "success!!!!");
        }                                                                                                                                                                     
    }); 
}   

对于rails paperclip应用程序,我只使用了scaffold并生成了名为"pictures"的模型,并在其上添加了paperclip附件.模型和控制器(接收请求)如下所示.

模型

class Picture < ActiveRecord::Base                                                                                                                                            
  attr_accessible :name, :image
  has_attached_file :image,
                    :styles => { :original => "480x480>", :thumbnail => "100x100>" },
                    :path => ':rails_root/public/system/pictures/image/:id_partition/:style_:filename'
end

调节器

# POST /pictures                                                                                                                                                              
# POST /pictures.json
def create
  @picture = Picture.new(params[:picture])

  respond_to do |format|
    if @picture.save
      format.html { redirect_to @picture, notice: 'Picture was successfully created.' }
      format.json { render json: @picture, status: :created, location: @picture }
    else
      format.html { render action: "new" }
      format.json { render json: @picture.errors, status: :unprocessable_entity }
    end
  end
end

收到请求时,"rails server"控制台会说出类似的内容

Started POST "/pictures/" for y.y.y.y at 2012-09-03 18:23:00 +0900
Processing by PicturesController#create as HTML
  Parameters: {"picture"=>{"name"=>"PictureName"}}
   (0.1ms)  begin transaction
  SQL (0.5ms)  INSERT INTO "pictures" ("album_id", "created_at", "image_content_type", "image_file_name", "image_file_size", "image_updated_at", "name", "updated_at", "user_id") VALUES (?, ?, ?, ?, ?, ?, ?, ?, ?)  [["album_id", nil], ["created_at", Mon, 03 Sep 2012 09:23:00 UTC +00:00], ["image_content_type", nil], ["image_file_name", nil], ["image_file_size", nil], ["image_updated_at", nil], ["name", "PictureName"], ["updated_at", Mon, 03 Sep 2012 09:23:00 UTC +00:00], ["user_id", nil]]
[paperclip] Saving attachments.
   (11.0ms)  commit transaction
Redirected to http://x.x.x.x:3000/pictures/10                                                                                                                               
Completed 302 Found in 15ms (ActiveRecord: 11.6ms)

如您所见,只发送了一个参数,并且未收到"picture [image]"参数,即原始图像数据.谁能帮我？

Answer 1

对不起,这是我的愚蠢错误.我应该做的

params.put("picture[image]", new File(Environment.getExternalStorageDirectory().getPath() + "/Pictures/CameraApp/test.jpg"));

不

params.put("picture[image]", File(Environment.getExternalStorageDirectory().getPath() + "/Pictures/CameraApp/test.jpg"));

应该使用新文件而不是文件

使用Android异步Http客户端(http://loopj.com/android-async-http/)时,我们不必关心MultipartEntity.谢谢所有回答我问题的人!!!!