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ngca.py
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ngca.py
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import datetime
import sqlite3
import matplotlib.pyplot as plt
from matplotlib.font_manager import FontProperties
from flask import Flask, render_template, request
DATABASE = 'data/data.db'
app = Flask(__name__)
@app.route("/")
def hello():
db = sqlite3.connect(DATABASE)
cur = db.cursor()
try:
cur.execute("SELECT * FROM sensorlog WHERE sensorid = 1")
data = cur.fetchall()
except:
return 'Error'
cur.close()
db.close()
if data ==[]:
return render_template('view.html', data = [], temp = "没有数据")
else:
temp1 = data[len(data) - 1]
temp = temp1[2]
return render_template('view.html', data = data, temp = temp)
@app.route("/input", methods = ['POST', 'GET'])
def add_data():
try:
if request.method == 'POST':
sensorid = int(request.form.get('id'))
sensorvalue = float(request.form.get('val'))
else:
sensorid = int(request.args.get('id'))
sensorvalue = float(request.args.get('val'))
except:
return 'Error'
nowtime = datetime.datetime.now()
nowtime = nowtime.strftime('%Y-%m-%d %H:%M:%S')
db = sqlite3.connect(DATABASE)
cur = db.cursor()
try:
cur.execute("INSERT INTO sensorlog(sensorid, sensorvalue, updatetime) VALUES(?, ?, ?)", (sensorid, sensorvalue, nowtime))
db.commit()
cur.execute("SELECT * FROM sensorlist where sensorid = ?", (sensorid,))
rv = cur.fetchall()
except:
return 'Error'
if rv == []:
try:
cur.execute("DELETE FROM sensorlog WHERE sensorid = ?", (sensorid,))
db.commit()
except:
return 'Error'
return 'Error'
cur.close()
db.close()
maxrv = rv[0][2]
minrv = rv[0][3]
if sensorvalue > maxrv or sensorvalue < minrv:
return '1'
else:
return '0'
@app.route("/get", methods = ['POST', 'GET'])
def get_data():
try:
if request.method == 'POST':
sensorid = int(request.form.get('id'))
else:
sensorid = int(request.args.get('id'))
except:
return 'Error'
db = sqlite3.connect(DATABASE)
cur = db.cursor()
try:
cur.execute("SELECT * FROM sensorlog where sensorid = ?", (sensorid,))
data = cur.fetchall()
except:
return
cur.close()
db.close()
body = ""
part = [0] * len(data)
head = "{\n \"sensorid\":\"" + str(sensorid) + "\",\n \"value\":[\n"
for i in range(len(data)):
value = data[i][2]
time = data[i][3]
part[i] = " {\n \"sensorvalue\":\"" + str(value) + "\",\n \"updatetime\":\"" + str(time) + "\"\n }"
for i in range(len(data)):
if i != len(data) - 1:
body += part[i] + ",\n"
else:
body += part[i] + "\n"
json_text = head + body + " ]\n}"
return json_text
@app.route("/view", methods = ['POST', 'GET'])
def view_data():
try:
if request.method == 'POST':
sensorid = int(request.form.get('id'))
else:
sensorid = int(request.args.get('id'))
except:
return 'Error'
db = sqlite3.connect(DATABASE)
cur = db.cursor()
try:
cur.execute("SELECT * FROM sensorlog where sensorid = ?", (sensorid,))
data = cur.fetchall()
except:
return
cur.close()
db.close()
if data == []:
return render_template("empty.html")
time=[]
temperature=[]
for item in data:
temperature.append(item[2])
time.append(item[3][11:19])
font = FontProperties(fname = "C:/Windows/Fonts/simsun.ttc", size = 15)
plt.plot(time, temperature)
plt.xlabel("时间", fontproperties = font)
plt.xticks(rotation = 30)
plt.ylabel("温度", fontproperties = font)
plt.title(str(sensorid) + "号传感器", fontproperties = font)
plt.savefig("static/image/image.jpg", dpi = 200, format = "jpg")
plt.close()
return render_template("image.html")
if __name__ == "__main__":
app.run(host = "0.0.0.0", port = 8080)