思路：
将发送的数据按照长度和body的方式一次放入一个大的buffer中，4个字节存放body长度，后面存放报文，依次放入数据。
后续如果想要存储复杂类型，可以拓展头部信息，比如数据类型等

#include <stdio.h>
#include <stdint.h>
#include <iostream>
#include <string>
#include <vector>
#include <stdlib.h>
#include <string.h>#define MSG_END 0xFFFFFFFFusing msg_t = std::vector<char>;std::vector<msg_t> deserialize(msg_t msg) {std::vector<msg_t> msgs;uint32_t curr_index = 0;do {uint32_t length = 0;//memcpy(&length,  + curr_index, 4);for (size_t i = 0; i < 4; i++) {((char*)&length)[i] = msg[curr_index + i];}if (length == MSG_END) {break;}curr_index += 4;msgs.emplace_back(msg_t{ msg.begin() + curr_index, msg.begin() + curr_index + length });//std::cout << "sub_msg->msg:" << sub_msg->msg << std::endl;curr_index += length;} while (1);return msgs;
}msg_t serialize(std::vector<msg_t>& msgs) {uint32_t length = 0;uint32_t curr_index = 0;for (auto msg : msgs) {length += msg.size();}length += (msgs.size() + 1) * 4;msg_t ret_msg(length, 0);for (auto msg : msgs) {uint32_t msg_size = msg.size();for (size_t i = 0; i < 4; i++) {msg[curr_index+i] = ((char*)&msg_size)[i];}curr_index += 4;std::copy(msg.begin(), msg.end(), ret_msg.begin() + curr_index);curr_index += msg.size();}msg_t end(4, 0xff);std::copy(end.begin(), end.begin(), ret_msg.begin() + curr_index);return ret_msg;
}int main() {msg_t str1(10, 'a');msg_t str2(20, 'b');msg_t str3(5, 'c');std::vector<msg_t> msgs{ str1,str2,str3 };auto test_msg = serialize(msgs);auto test_msgs = deserialize(test_msg);for (auto s : test_msgs) {for (auto c : s) {printf("%c", c);}std::cout << std::endl;}return 0;
}