Transferring images using flask

client ：

import requests
import os
import cv2
import time
import base64


url = "http://180.201.5.153:1212"
filename = '13_rgb.png'

start_time = time.time()

#  Read images 
img = cv2.imread(filename)

#  The encoded image is  bytes
success, encoded_image = cv2.imencode(".jpg", img)
img_bytes = encoded_image.tobytes()
img_bytes = base64.b64encode(img_bytes)
img_bytes = img_bytes.decode('ascii')

#  Upload image   Waiting for feedback 
data = {
    'img': img_bytes}
r = requests.post(url, data=data)
result = r.text

print(result)

sum_t = time.time() - start_time
print('sum time: ', sum_t)

Server side

# -*- coding: UTF-8 -*-

from flask import request, Flask
import os
import cv2
import torch
import base64
import math
import numpy as np
from sgdn.sgdn import SGDN

app = Flask(__name__)

@app.route("/", methods=['POST'])
def get_frame():
    img = request.form.get('img')

    if img:
        #  Decode image data 
        img = base64.b64decode(img.encode('ascii'))
        image_data = np.fromstring(img, np.uint8)
        image_data = cv2.imdecode(image_data, cv2.IMREAD_COLOR)

        print(image_data.shape)
        cv2.imwrite('/home/wangdx/research/mir_robot/grasp_server/1.png', image_data)

        toClient = str({
    'cls': 1})
        print("success")
        return toClient
    else:
        return 'failed'


if __name__ == "__main__":
    app.run("0.0.0.0", port=1212)