使用Boost.Asio获得“整个分组” [英] Using Boost.Asio to get "the whole packet"

问题描述

我有一个TCP客户端连接到我的服务器，它发送原始数据包。如何，使用Boost.Asio，我可以每次（异步，当然）获得整个数据包？假设这些包可以是任何大小，直到我的记忆的全部大小。

I have a TCP client connecting to my server which is sending raw data packets. How, using Boost.Asio, can I get the "whole" packet every time (asynchronously, of course)? Assume these packets can be any size up to the full size of my memory.

基本上，我想避免创建一个静态大小的缓冲区。

Basically, I want to avoid creating a statically sized buffer.

推荐答案

通常，当你做异步IO，你的协议应该支持它。
一个简单的方法是在逻辑级别为字节数组加上它的长度前缀，并使读取代码缓冲区上升，直到它有一个完整的缓冲区准备好进行解析。

typically, when you do async IO, your protocol should support it. one easy way is to prefix a byte array with it's length at the logical level, and have the reading code buffer up until it has a full buffer ready for parsing.

如果你不这样做，你会得到这个逻辑分散在所有的地方（考虑读取一个空终止字符串，这意味着如果你只是得到它的每一次的一部分select / poll返回）。

if you don't do it, you will end up with this logic scattered all over the place (think about reading a null terminated string, and what it means if you just get a part of it every time select/poll returns).

这篇关于使用Boost.Asio获得“整个分组”的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！