一尘不染

如何将数据从Matlab发送到Rails

json

我是Rails和Web开发的新手。

我正在Matlab中生成一堆对象,我想将这些对象发送到我的Rails应用程序中的数据库中。谁能建议我该怎么做?

到目前为止,在Rails端,我已经为数据生成了基本的支架。我可以使用“ / myobjects / new”中的表单将对象添加到数据库中。

在Matlab端,我一直在尝试使用HTTP POST请求添加对象,如下所示:

s = urlread('http://localhost:3000/myobjects.json','POST',{'myobject','{name1:''value1''}'})

这将失败,并将以下内容打印到Rails控制台:

Started POST "/myobjects.json" for 127.0.0.1 at 2012-06-16 11:48:28 -0400
Processing by MyobjectsController#create as JSON
  Parameters: {"myobject"=>"{name1:'value1'}"}
WARNING: Can't verify CSRF token authenticity
Completed 500 Internal Server Error in 1ms

NoMethodError (undefined method `stringify_keys' for "{name1:'value1'}":String):
  app/controllers/myobjects_controller.rb:43:in `new'
  app/controllers/myobjects_controller.rb:43:in `create'

这种方法可能不合时宜,但是希望上面的代码可以使我的目标明确。谁能告诉我如何修复我的代码,或提出更好的策略来使我的数据进入轨道?

编辑

目前,我的new和create方法如下所示(但我可以根据需要更改它们)

# GET /irs/new
  # GET /irs/new.json
  def new
    @ir = Ir.new

    respond_to do |format|
      format.html # new.html.erb
      format.json { render json: @ir }
    end
  end

  # POST /irs
  # POST /irs.json
  def create
    @ir = Ir.new(params[:ir])

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

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2020-07-27

共1个答案

一尘不染

最后,我放弃了尝试使用matlab的内置函数来实现此目的。相反,我导入了一个Java库(Apache
HttpComponents
)。这是我想出的脚本。这完成了工作。

javaaddpath(['utils/httpcomponents-client-4.2/lib/httpcore-4.2.jar']);
javaaddpath(['utils/httpcomponents-client-4.2/lib/httpclient-4.2.jar']);


import org.apache.http.impl.client.DefaultHttpClient
import org.apache.http.client.methods.HttpPost
import org.apache.http.entity.StringEntity


httpclient = DefaultHttpClient();

httppost = HttpPost('http://127.0.0.1:3000/myobjects.json');
httppost.addHeader('Content-Type','application/json');
httppost.addHeader('Accept','application/json');

params = StringEntity('{"field1":"value1"}');
httppost.setEntity(params);

response = httpclient.execute(httppost);
2020-07-27