从Java到西纳特拉服务发布JSON PARAMS [英] Posting JSON params from java to sinatra service

问题描述

我有一个Android应用程序发布到我的西纳特拉服务。早些时候，我无法对我的西纳特拉服务中读取参数。然而，当我设置内容类型为X-WWW的形式urlen codeD。我能看到PARAMS，但倒不怎么我想要的。我得到的东西这是我的要求PARAMS我西纳特拉的服务。

I have an android app posting to my sinatra service. Earlier I was not able to read parameters on my sinatra service. However, after I set content type to "x-www-form-urlencoded". I was able to see params but not quite how I wanted. I am getting something this as my params of the request at my sinatra service.

{"{\"user\":{\"gender\":\"female\"},\"session_id\":\"7a13fd20-9ad9-45c2-b308-
8f390b4747f8\"}"=> nil, "splat"=>["update_profile.json"], "captures"=>["update_profile.json"]}

这是我是如何从我的应用要求。

This is how I am making request from my app.

StringEntity se;                    
se = new StringEntity(getJsonObjectfromNameValueList(params.get_params(), "user");
se.setContentType("application/x-www-form-urlencoded");
postRequest.setEntity(se);



private JSONObject getJsonObjectfromNameValueList(ArrayList<NameValuePair> _params, String RootName) {
    JSONObject rootjsonObject = new JSONObject();
    JSONObject jsonObject = new JSONObject();

    if (_params != null) {
        if (!_params.isEmpty()) {
            for (NameValuePair p : _params) {
                try {
                    if (p.getName().equals(ApplicationFacade.SESSION_ID))
                        rootjsonObject.put((String) p.getName(), (String) p.getValue());
                    else
                        jsonObject.put((String) p.getName(), (String) p.getValue());
                } catch (JSONException e) {
                    e.printStackTrace();  //To change body of catch statement use File | Settings | File Templates.
                }
            }
        }
    }

    try {
        rootjsonObject.put(RootName, jsonObject);

    } catch (JSONException e) {
        e.printStackTrace();
    }
    return rootjsonObject;
}

我试着用用给出的方法：如何使Java中的嵌套的JSON对象？

这是我如何使用在链接中提到的方法做了我的请求。

This is how I made my request using the method mentioned in the link.

public ArrayList<NameValuePair> getJsonObjectfromNameValueList(ArrayList<NameValuePair> _params, String RootName){
    ArrayList<NameValuePair> arrayList = new ArrayList<NameValuePair>();
    JSONObject jsonObject = new JSONObject();
    if (_params != null) {
        if (!_params.isEmpty()) {
            for (NameValuePair p : _params) {
                try {
                    if (p.getName().equals(ApplicationFacade.SESSION_ID))
                        arrayList.add(new BasicNameValuePair((String) p.getName(), (String) p.getValue()));
                    else
                        jsonObject.put((String) p.getName(), (String) p.getValue());
                } catch (JSONException e) {
                    e.printStackTrace();  //To change body of catch statement use File | Settings | File Templates.
                }
            }
        }
    }
    arrayList.add(new BasicNameValuePair(RootName, jsonObject.toString()));
    return arrayList;
}

我做出上述变化是在此之后得到的回应：

The response I got after making the above change was this:

{"session_id"=>"958c7dee-f12c-49ec-ab0c-932e9a4ed173",
"user"=>"[gender=male]",
 "splat"=>["update_profile.json"],
 "captures"=>["update_profile.json"]}

pretty接近，但性别=男是不可取的。我需要通过这些参数来盲目的另一项服务，所以我需要让他们的权利。

Pretty close but that "gender=male" is not desirable. I need to pass these arguments to another service blindly, so I need to get them right.

这是我想在我的西纳特拉服务PARAMS跟随。

The params that I want at my sinatra service are following.

{"session_id" : "958c7dee-f12c-49ec-ab0c-932e9a4ed173",
 "user": 
 {
   "gender" : "male"
 }

}

推荐答案

原来，问题出西纳特拉获取其PARAMS的方式。
我是能够解决使用凯尔的这个帖子真棒回应我的问题：<一href=\"http://stackoverflow.com/questions/12131763/sinatra-controller-params-method-coming-in-empty-on-json-post-request\">Sinatra控制器PARAMS法空JSON的POST请求来

It turns out that the problem is with the way Sinatra gets its params. I was able to solve my problem using Kyle's awesome response to this post: Sinatra controller params method coming in empty on JSON post request

code：

before do
  if request.request_method == "POST" and request.content_type=="application/json"
    body_parameters = request.body.read
    parsed = body_parameters && body_parameters.length >= 2 ? JSON.parse(body_parameters) : nil
    params.merge!(parsed)
  end
end

备用方法：
然而，我发现了一个更好的解决办法来对付它，通过添加一个中间件为我做相同的。我用机架的contrib 宝石。
以下是我在code做了更改：

Alternate Method: However, I found a better solution to deal with it, by adding a middleware to do the same for me. I used rack-contrib gem. Following are the changes I did in my code:

修改

使用git获取哪里的问题涉及到的内容类型应用程序/ JSON的版本;字符集= UTF-8 固定

use git to get the version where issue related to content type application/json;charset=UTF-8 is fixed

的Gemfile：

gem 'rack-contrib', git: '[e-mail]:rack/rack-contrib', ref: 'b7237381e412852435d87100a37add67b2cfbb63'

config.ru

use Rack::PostBodyContentTypeParser

来源： http://jaywiggins.com/2010 / 03 /使用机架中间件到解析JSON的/

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