我正在建立一个小应用程序来记录日志并在客户端上显示它。但是,当我将行添加到日志中时,我会丢失一些数据。
这是相关的Python处理程序:
@socketio.on('Request logs')
def handle_request_logs():
logfile = '/path/to/some_log.log'
# gets last 25 lines from logfile
last_n_lines = tailer.tail(open(logfile), 25)
# sends the initial 25 lines
emit('Initial send', { 'lines' : last_n_lines })
# emits lines that were appended to logfile
@copy_current_request_context
def tail(logfile):
for line in tailer.follow(open(logfile)):
print("About to emit {0}".format(line))
emit('log', { 'line' : line })
# emit added lines as they come
t = threading.Thread(target=tail, args=(logfile,))
t.start()
这是接收'log'
的JS:
socket.on('log', function(data) {
alert("Got some data: ", data['line']);
});
每当我向日志添加内容(例如echo 'hello, world!' >> /path/to/some_log.log
)时,我会在客户端看到一条带有消息的警报
"Got some data: "
。但是,我的服务器打印"About to emit hello, world!"
。
为什么会这样?
答案 0 :(得分:1)
你的警报(javascript)中有一个逗号。它应该是一个+用于连接。