java - Android 和 CherryPy

Question

我正在开发一个 Android 应用程序，在该应用程序中，我必须在使用 Cherrypy 构建的 REST API 上发出 POST HTTP 请求。

这是应用程序的java代码:

public String post(String host,int port,String path,String msg) throws IOException{
    URL url = new URL ("http",host,port,path);
    Log.e("track","sto per connettermi");
    URLConnection conn = url.openConnection();
    Log.e("track","connesso");
    conn.setDoOutput(true);
    conn.setDoInput(true);
    conn.setAllowUserInteraction(true);
    conn.getOutputStream().write(msg.getBytes());
    conn.getOutputStream().close();
    StringBuilder sb = new StringBuilder();
    BufferedReader in = new BufferedReader(
            new InputStreamReader(
                    conn.getInputStream()
            )
    );
    String line;
    while ((line = in.readLine()) != null)
        sb.append(line);
    in.close();
    return sb.toString();
}

这是 REST API 的 python 代码:

def POST(self,*uri,**params):
    if uri[0] == 'userAuth':
        tempJson = json.loads(cherrypy.request.body.read())
        user_name = tempJson['user_name']
        pwd = tempJson['pwd']
        if user_name in self.users:
            return json.dumps({"user_id":str(self.users.index(user_name)),"result":True})
        return json.dumps({"result":"Wrong Credentials","success":False})

在cherrypy服务器上我收到以下错误:ValueError:无法解码 JSON 对象问题是我通过 java 流发送数据，但无法在 python 中对其进行解码。有没有办法直接以字符串形式发送数据或在 python 中对其进行解码？

已解决修复添加行:conn.setRequestProperty("Content-Type","application/json");

Answer 1

将您的 POST 方法定义为:

@cherrypy.tools.json_in()
@cherrypy.tools.json_out()
def POST(self,*uri,**params):
    req = cherrypy.request
    if uri[0] == 'userAuth':
        user_name = req.json['user_name']
        pwd = req.json['pwd']
        if user_name in self.users:
            return {"user_id": str(self.users.index(user_name)), "result": True}
        return {"result": "Wrong Credentials","success": False}

有关 json 工具的更多信息 https://docs.cherrypy.org/en/latest/basics.html#dealing-with-json 。同样在android方面...看看https://www.wikihow.com/Execute-HTTP-POST-Requests-in-Android您很可能需要使用 HttpURLConnection 并指定 HTTP 方法 client.setRequestMethod(“POST”);