问题描述
我想使用 Flask 创建 API,该 API 可以接受带有一些字符串数组的图像。有许多解决方案可以保存图像然后作为文件发送。我有兴趣将图像作为 Json 数据发送。这是演示它的链接。 https://gist.github.com/kylehounslow/767fb72fde2ebdd010a0bf4242371594
我只想修改上面链接上的代码,这样我也应该能够发送一些字符串值,例如图像中的人数、捕获的时间等。
请为服务器端和客户端编写代码片段。
给定的代码客户端:
from __future__ import print_function
import requests
import json
import cv2
addr = 'http://localhost:5000'
test_url = addr + '/api/test'
# prepare headers for http request
content_type = 'image/jpeg'
headers = {'content-type': content_type}
img = cv2.imread('lena.jpg')
# encode image as jpeg
_,img_encoded = cv2.imencode('.jpg',img)
# send http request with image and receive response
response = requests.post(test_url,data=img_encoded.tostring(),headers=headers)
# decode response
print(json.loads(response.text))
# expected output: {u'message': u'image received. size=124x124'}
给定的代码服务器:
from flask import Flask,request,Response
import jsonpickle
import numpy as np
import cv2
# Initialize the Flask application
app = Flask(__name__)
# route http posts to this method
@app.route('/api/test',methods=['POST'])
def test():
r = request
# convert string of image data to uint8
nparr = np.fromstring(r.data,np.uint8)
# decode image
img = cv2.imdecode(nparr,cv2.IMREAD_COLOR)
# do some fancy processing here....
# build a response dict to send back to client
response = {'message': 'image received. size={}x{}'.format(img.shape[1],img.shape[0])
}
# encode response using jsonpickle
response_pickled = jsonpickle.encode(response)
return Response(response=response_pickled,status=200,mimetype="application/json")
# start flask app
app.run(host="0.0.0.0",port=5000)
解决方法
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