无法通过 POST 请求发送数据

Question

I have to send some data at an endpoint (flask endpoint). The data I need to send is an image and a variable. I am using the below code to send the data but I am getting an error AttributeError: 'int' object has no attribute 'read'

Sender Code

data = {'image': open(fl, 'rb'), 'var': 0}
res = requests.post(url, files=data)

Reciever End Point

file = request.files['image']
f1 = file.read()
f2 = np.fromstring(f1, np.uint8)
f3 = cv.imdecode(f2, cv.IMREAD_COLOR)

var = int(request.form.get('var'))

I tried the following changes but that results in other error TypeError: Object of type BufferedReader is not JSON serializable

Changes #1

data = {'image': open(fl, 'rb'), 'var': 0}
res = requests.post(url, json=data)

Changes #2

data = {'image': open(fl, 'rb'), 'var': 0}
headers = {'Content-Type': 'application/json', 'Accept': 'application/json'}
res = requests.post(url, json=data, headers=headers)

Changes #3

data = {'image': open(fl, 'rb'), 'var': 0}
headers = {'Content-Type': 'application/json', 'Accept': 'application/json'}
res = requests.post(url, data=json.dumps(data), headers=headers)

I can easily send and receive image but I am unable to send variable data

I can send data (image and variable) easily with Postman App

Answer 1

Fixed issue by using below code

Sender Code

payload = {'var': '1'}
files = {'image': open(fl, 'rb')}
res = requests.post(url, data=payload, files=files)