使用Rest API的Android排名错误请求代码415？

Question

服务器端：

    import flask

    import flask.ext.sqlalchemy

    import flask.ext.restless

    app = flask.Flask(__name__)

    app.config['DEBUG'] = True

    app.config['SQLALCHEMY_DATABASE_URI'] = 'sqlite:////tmp/test.db'

    SQLALCHEMY_TRACK_MODIFICATIONS=True
    db = flask.ext.sqlalchemy.SQLAlchemy(app)

    class Person(db.Model):

        id = db.Column(db.Integer, primary_key=True)
        name = db.Column(db.Unicode, unique=True)
        birth_date = db.Column(db.Date)
    class Computer(db.Model):

        id = db.Column(db.Integer, primary_key=True)
        name = db.Column(db.Unicode, unique=True)
        vendor = db.Column(db.Unicode)
        purchase_time = db.Column(db.DateTime)
        owner_id = db.Column(db.Integer, db.ForeignKey('person.id'))
        owner = db.relationship('Person', backref=db.backref('computers',
                                                             lazy='dynamic'))

    db.create_all()

    manager = flask.ext.restless.APIManager(app, flask_sqlalchemy_db=db)

    manager.create_api(Person, methods=['GET', 'POST', 'DELETE'])

    manager.create_api(Computer, methods=['GET'])

    app.run(host='0.0.0.0', port=5000, debug=True)

客户端：

使用排球

 RequestQueue queue = Volley.newRequestQueue(this);

        StringRequest postRequest = new StringRequest(Request.Method.POST, url,
                new Response.Listener<String>()
                {
                    @Override
                    public void onResponse(String response) {
                        // response
                        Log.d("Response", response);
                    }
                },
                new Response.ErrorListener()
                {
                    @Override
                    public void onErrorResponse(VolleyError error) {
                        // error

                        Log.d("Error.Response", String.valueOf(error));
                    }
                }
        ) {
            @Override
            protected Map<String, String> getParams()
            {
                Map<String, String>  params = new HashMap<String, String>();
                params.put("name", "Anything");

                return params;
            }
        };
        queue.add( postRequest );

    }

日志输出：

  

04-29 11：42：24.556 1890-1946 /？ I / Icing：完成索引F3642025687382E430F3465743F12480D56AAC66       04-29 11：43：32.123 3147-3196 /？ E / Volley：[157] BasicNetwork。       performRequest：http://IP:5000/api/person的意外响应代码415       04-29 11：43：32.132 3147-3147 /？ D / Error.Response：com.android.volley.ServerError       04-29 11:45:19.365 1298-1311 /？ I / UsageStatsService：User [0]将使用统计信息刷新到磁盘

Answer 1

提供正确的内容类型如下

    // Optional Parameters to pass as POST request
    JSONObject js = new JSONObject();
    try {
        js.put("name","anything");
    } catch (JSONException e) {
        e.printStackTrace();
    }

    // Make request for JSONObject
    JsonObjectRequest jsonObjReq = new JsonObjectRequest(
            Request.Method.POST, url, js,
            new Response.Listener<JSONObject>() {
                @Override
                public void onResponse(JSONObject response) {
                    Log.d(TAG, response.toString() + " i am queen");
                }
            }, new Response.ErrorListener() {
                @Override
                public void onErrorResponse(VolleyError error) {
                    VolleyLog.d(TAG, "Error: " + error.getMessage());
                }
        }) {

        /**
         * Passing some request headers
         */
        @Override
        public Map<String, String> getHeaders() throws AuthFailureError {
            HashMap<String, String> headers = new HashMap<String, String>();
            headers.put("Content-Type", "application/json; charset=utf-8");
            return headers;
        }

    };

    // Adding request to request queue
    Volley.newRequestQueue(this).add(jsonObjReq);

}

Answer 2

415是错误媒体类型的错误代码。当服务器需要json时，您将以纯文本形式发送正文或帖子请求。找出您应该发送的内容类型，并将帖子正文添加到该类型。

@Override
public byte[] getBody() {
    return 'your json string'.getBytes(); 
}

@Override
public String getBodyContentType() {
    return "application/json; charset=utf-8";
}

Answer 3

如果您使用的是Kotlin，这是我实现的代码段

 val jsonBody = JSONObject()
    jsonBody.put("email", email)
    jsonBody.put("password", password)
    val requestBody = jsonBody.toString()

    val registerRequest =
        object : StringRequest(Method.POST, URL_REGISTER, Response.Listener { response ->
            print(response)
            complete(true)

        }, Response.ErrorListener { error ->
            Log.d("Error", "not possible to register at this time . $error")
            complete(false)


        }) {
            override fun getBodyContentType(): String {
                return "application/json; charset=utf-8";
            }

            override fun getBody(): ByteArray {
                return requestBody.toByteArray()
            }
        }

    Volley.newRequestQueue(context).add(registerRequest)
}