Redis - 解析远程服务器提供的数据流

Redis - Parse data stream provided by remote server

我已经在本地设置了 Redis,我想连接到远程服务器,该服务器以 < ID, value > 的形式提供合成数据流。到目前为止,我已经设法使用套接字连接到上述服务器,读取数据流并打印出来。相反,我想将这些对存储在哈希数据结构中(稍后我将存储有关每个 ID 的更多信息)。问题是我不知道如何解析数据流以便使用 hget 以及如何连续使用它。在更高层次上,我希望能够将传入数据流中的名称和值作为参数传递给 hget。忘了说我正在使用 Python API。 到目前为止:

import socket
client_socket = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
client_socket.connect(('xx.xx.xx.xxx', 1337))
while 1:
        data = client_socket.recv(512)
        print data

数据流示例:

'AMZN,780.6758\n'
'TSLA,197.1802\n'
'CSCO,29.7491\n'
'GOOG,761.3758\n'
'AAPL,112.4122\n'
'GRPN,4.5848\n'
'FB,121.1232\n'
'MSFT,60.3529\n'
'INTC,35.9056\n'
'NVDA,94.473\n'
'QCOM,68.7389\n'
'AMZN,780.6761\n'
'TSLA,197.1798\n'
'CSCO,29.7486\n'
'GOOG,761.3755\n'
'AAPL,112.4122\n'
'GRPN,4.5848\n'
'FB,121.1237\n'
'MSFT,60.353\n'
'INTC,35.9054\n'
'NVDA,94.473\n'
'QCOM,68.7391\n'

我不确定是否可以保证所有行都完全格式化,但让我们保证它们是。

将单个非空行解析为 key/value 对非常简单:

key, value = line.strip().split(",", 1)

假设您的数据可能不完整(未终止的记录)并且它是标记记录结束的换行符,您可以将不完整的记录存储在缓冲区中并在解析之前将它们添加回去,因此您的函数可能看起来像这个:

 def run(client_socket):
    buffer = ""
    while True:
        data = client_socket.recv(512)
        # not sure the following lines makes sense - 
        # you may actually want to handle exceptions 
        # or whatever
        if not data:
            break

        # add the buffer back 
        data = buffer + data
        # split on newlines
        lines = data.splitlines()
        # check if we have an incomplete record
        # (if it doesn't end with a newline)
        if data[-1] !=  '\n':
            # incomplete record, store it back so
            # we process it next time
            buffer = lines.pop()
        else:
            # all records complete for this call, 
            # empty the buffer for next turn
            buffer = "" 

        # now handle our records:    
        for line in filter(None, lines):
            k, v = line.split(",", 1)
            do_something_with(k, v)

do_something_with(k, v) 的实现留作 reader 的练习。