tindex.py

# exactly the same as index.py except it logs how long the services takes to run
from flask import Flask
from flask import request
import keras
import json
import numpy as np
import time

app = Flask(__name__)
model = keras.models.load_model('model.hdf5')

def transformData(array):
    x_train = np.asarray(array).astype('float32')
    mean = x_train.mean(axis=0)
    x_train -= mean
    std = x_train.std(axis=0)
    x_train /= std
    return x_train


def sConcat(arr1, arr2):
    return arr1[4:] + arr2[4:]


@app.route("/cnnapi", methods=["POST"])
# need user vectors of users and filter list
# returns sorted list of user vectors
def cnnapi():
    start = time.time()
    print('received request')
    rjson = request.get_json()
    uid = rjson['u']
    predictionArr = rjson['o']
    print(uid, predictionArr)
    print('starting prediction')
    print(len(predictionArr[0]))    
    fP = []
    for x in range(len(predictionArr)):
        fP.append(transformData(sConcat(uid, predictionArr[x])))
    fP = np.asarray(fP).astype('float32')
    rankedL = model.predict(fP)
    print(rankedL)
    rankedD = []
    for x in range(len(rankedL)):
        rankedD.append(rankedL[x][0])
    keras.backend.clear_session()
    end = time.time()
    with open("times.txt", 'a`+') as times:
        times.write(str(end - start))
    return json.dumps(np.argsort(rankedD)[::-1].tolist())


if __name__ == "__main__":
    app.run(host="0.0.0.0")

# curl -v -d '{"u": [0, 0, 0, 1, 3.21, 4.79, 6.1, 7.44, 4.61, 0.45, 0.55, 10, 7.29, 0.58, 0.68, 10, 3.17, 5.4, 7.86, 7.56, 4.86, 3.26, 2.2, 5.49, 9.63, 9.1, 0.0, 2.79, 9.91, 6.66, 0.0, 8.66, 2.66, 2.07], "o": [[0, 0, 0, 1, 3.33, 5.17, 7.9, 10, 5.02, 0.29, 0.36, 7.99, 7.39, 0.57, 0.48, 6.57, 2.39, 5.01, 8.88, 3.96, 4.75, 2.25, 0.0, 6.01, 7.69, 10, 1.85, 3.15, 9.91, 9.7, 3.26, 5.72, 4.85, 1.21], [0, 0, 1, 0, 0.34, 7.86, 1.71, 0.4, 4.39, 4.9, 0.52, 4.36, 1.8, 7.44, 5.45, 5.2, 10, 2.71, 4.01, 8.84, 1.3, 7.48, 10, 6.9, 7.11, 9.65, 7.34, 8.82, 2.99, 7.12, 5.48, 0.0, 6.7, 4.29]]}' -H "Content-Type: application/json" localhost:5000/cnnapi