我正在创建一个将数据发送到客户端的应用程序,然后客户端会打印这些数据。如何使用Flask在Python中将数据从服务器发送到客户端?
我使用Flask作为处理服务器端的后端框架,另一个为当前客户端生成随机ID的Python脚本,客户端每隔4秒检查一次新数据是否进入,如果获取数据它应该打印它。
后端代码
@app.route('/data/api/interact/<string:client_id>', methods=['GET', 'POST'])
@login_required
def interact(client_id):
global data
form = Interact()
data = ''
if form.is_submitted():
get_data = form.ct.data
if get_data == 'hello':
data = 'Hi how are you?'
return redirect(url_for('data_handler', client_id=client_id, data=form.ct.data))
return render_template('interact.html', form=form, client_id=client_id)
@app.route('/data/api/interact/handler/', methods=['GET', 'POST'])
def data_handler():
client_id = request.args.get('client_id')
get_data = request.args.get('data')
return json.dumps({'client_id': client_id, 'data': get_data})
客户端脚本
handler_url = 'http://192.168.0.102:5000/data/api/interact/handler/'
class check_data(threading.Thread):
def __init__(self, client_id):
threading.Thread.__init__(self)
self.event = threading.Event()
self.client_id = client_id
def run(self):
global handler_url
try:
while not self.event.is_set():
file = urllib2.urlopen(handler_url)
xml = file.read()
print xml
file.close()
except:
pass
self.event.wait(4)
def new_client():
client_id = 'ClientId' + str(random.randrange(1, 500))
return client_id
client_id = 'null'
while client_id == 'null':
client_id = new_client()
if 'null' not in client_id:
break
print 'Client ID: ' + client_id
client = check_data(client_id)
client.start()
一切正常,但如果我从服务器发送数据到客户端它打印:
{'data': '', 'client_id': null}
感谢您的关注,您的回答也帮助了我;) – makmani