利用Python進行圖片發送與接收的兩種方法---包含客戶端和服務器端代碼

第一種方法 opencv、requests、flask

此方法比較耗費時間 600毫秒左右

客戶端代碼

#coding:utf-8
import cv2
import json
import requests

img = cv2.imread("/home/aqonvs.jpg")
res = {"image": str(img.tolist()).encode('base64')}  # img是ndarray，無法直接用base64編碼，否則會報錯
_ = requests.post("http://192.71.30.172:8081", data=json.dumps(res))

服務器端代碼

#coding:utf-8
from flask import request, Flask
import json
import numpy as np
import time
import cv2

app = Flask(__name__)

@app.route("/", methods=['POST'])
def get_frame():
    start_time = time.time()
    res = json.loads(request.data)
    frame = eval(res["image"].decode("base64"))   # dtype為int32
    frame = np.array(frame, dtype=np.uint8)
    cv2.imwrite('/home/tmp.jpg',frame)
    duration = time.time() - start_time
    print('duration:[%.0fms]' % (duration*1000))
    return '0000'

if __name__ == "__main__":
    app.run("192.71.30.172", port=8081)  #端口為8081

第二種 直接利用文件傳輸 時間在10毫秒以內

客戶端代碼

#coding:utf-8

import requests
url = "xxxxx"
str000='/home/aqonvs.jpg'
newname = str000.split('/')
print newname[len(newname)-1]
files = {'file':(newname,open('/home/aqonvs.jpg','rb'),'image/jpg')}
r = requests.post(url,files = files)
result = r.text
print result

服務器端代碼

#coding:utf-8
from flask import request, Flask
import time
import os
app = Flask(__name__)

@app.route("/", methods=['POST'])
def get_frame():
    start_time = time.time()
    upload_file = request.files['file']
    old_file_name = upload_file.filename
    if upload_file:
        file_path = os.path.join('/home/local/upload/', old_file_name)
        upload_file.save(file_path)
        print "success"
        print('file saved to %s' % file_path)
        duration = time.time() - start_time
        print('duration:[%.0fms]' % (duration*1000))
        return 'success'
    else:
        return 'failed'


if __name__ == "__main__":
    app.run("127.0.0.1", port=5000)

圖片和data url （base64）互轉：  https://blog.csdn.net/mouday/article/details/93489508

上傳解析參考： https://www.jb51.net/article/176627.htm