March 2022
Intermediate to advanced
522 pages
13h 52m
Chinese
Content preview from Python语言及其应用（第2版）
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网络
｜
309
• Marshmallow
• Pydantic
，该包用到了类型提示，要求
Python
版本最低为
Python 3.6
。
• TypeSystem
这些工具通常与
We
b
服务器一起使用，确保通过
HTTP
传输的字节以正确的结构接受进一
步处理。
17.8
远程过程调用
远程过程调用（
remote procedure call
，
RPC
）看起来就像普通的函数，但是在网络上的远
程机器中执行的。不需要使用在
URL
或
HTTP
请求主体内编码的参数调用
RESTful
API
，
可以在自己的机器上调用
RPC
函数。我们的本地机器负责：
•
将函数参数序列化为字节；
•
将经过编码的字节发送至远程机器。
远程机器负责：
•
接收经过编码的请求字节；
•
将字节反序列化为数据结构；
•
使用解码后的数据查找并调用服务函数；
•
编码函数执行结果；
•
将编码后的字节返回给调用者。
最后，本地机器负责：
•
将返回的字节解码为结果。
RPC
是一种流行的技术
，有多种实现方式。在服务器端，启动服务器程序，使用某些字节
传输和编码
/
解码方法与其连接
，定义一些服务函数，对外宣布
RPC
已可用。客户端会连
接至服务器，通过
RPC
调用服务函数。
17.8.1 XML-RPC
标准库中包含了一种使用
XML
作为交换格式的
RPC
实现：
xmlrpc
。你在服务器中定义并
注册函数，客户端就像导入函数那样对其进行调用。先来研究一下文件
xmlrpc_server
.py
，
如例
17-1
1
所示。
例
17-11
xmlrpc_server.py
from xmlrpc.server ...
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I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.