C# Post With Binary Value Sample

Form1.cs

using System;
using System.IO;
using System.Linq;
using System.Net;
using System.Text;
using System.Windows.Forms;

namespace PostDataWithFlask {
    public partial class Form1 : Form {
        public Form1() {
            InitializeComponent();
        }

        private void button1_Click(object sender, EventArgs e) {
            textBox1.Text = DoPost();
        }

        private String DoPost(){
            var enc = Encoding.UTF8;

            var postWordValue = "イ&ン=ター?ネッ%ト";
            // var postWordValue = "x=11&y=32?http://google.com/";
            if (postWordValue != Encoding.ASCII.GetString(Encoding.ASCII.GetBytes(postWordValue))) {
                postWordValue = "%" + BitConverter.ToString(enc.GetBytes(postWordValue)).Replace("-", "%");
                if (postWordValue == "%") postWordValue = "";
            }
            else {
                postWordValue = Uri.EscapeDataString(postWordValue);
            }

            //POST送信する文字列を作成

            string postData = "lang=" + Uri.EscapeDataString("ja=japanese") + "&word=" + postWordValue;
            byte[] postDataBytes = Encoding.ASCII.GetBytes(postData);

            //WebRequestの作成
            var req = (HttpWebRequest)WebRequest.Create("http://localhost:5000/");

            //メソッドにPOSTを指定
            req.Method = "POST";
            req.ContentType = "application/x-www-form-urlencoded";
            req.ContentLength = postDataBytes.Length;

            //データをPOST送信するためのStreamを取得
            using (var reqStream = req.GetRequestStream()) {
                reqStream.Write(postDataBytes, 0, postDataBytes.Length);
            }

            var returnValue = "";
            //サーバーからの応答を受信するためのWebResponseを取得
            var res = req.GetResponse() as HttpWebResponse;
            using(var rs = res.GetResponseStream())
            using (var sr = new System.IO.StreamReader(rs, enc)) {
                returnValue = sr.ReadToEnd();
            }

            return returnValue;
        }

    }
}

server.py

# coding: utf-8

from flask import Flask
from flask import request
import binascii

app = Flask(__name__)

@app.route('/', methods=['GET','POST'])
def hello():
    
    #return binascii.hexlify(request.stream.read())
    return request.form['lang'] + " " + request.form['word']

if __name__ =='__main__':
    app.run()


## setup sample
# > mkdir c:\temp
# > cd c:\temp
# > mkdir flask-get-post && cd flask-get-post
# > virtualenv venv
# > venv\scripts\activate
# > pip install flask