python Flask POST binary float array using numpy

client_side.py

def post_bin_example():
    import requests
    import numpy as np
    #NOTE! the dtype used here and on the server have to match and byte ordering isn't considered in this example
    x =  np.random.rand(10).astype(np.float32)
    print(f'sending {len(x)} floats : {x}')
    res = requests.post(url=ROOT_PATH+r'/readbin',
                        data=x.tobytes(),
                        headers={'Content-Type': 'application/octet-stream'})
    print(res)
   

server_side_view.py

# NOTE: this is code is a standard Flask view 
@app.route('/readbin', methods=['POST'])
def read_bin_example():
    chunk_size = 4096
    data = bytearray()
    while True:
        chunk = request.stream.read(chunk_size)
        if len(chunk) == 0:
            break 
        data.extend(chunk)
    if len(data):
        import numpy as np
        #NOTE! byte ordering not considered in this example
        floats = np.frombuffer(data, dtype=np.float32)
        print(f'got {len(data)} bytes, {len(floats)} floats')
        print(floats)
        
    return f'ok'