通过boost套接字发送和接收压缩文件 [英] Send and receiving compressed files with boost over socket

问题描述

在我的项目中，使用boost的Zlib过滤器压缩套接字上的读写消息，我想知道如何对文件执行相同的操作.有什么更好的方法可以提高速度?将数据保存在缓冲区中而不使用硬盘?

In my project, read and write messages over socket are compressed with Zlib Filters of boost, i would like to know how to do the same with files. what better way for better speed? Save the data in buffer without use hard disk?

我在使用boost传输文件时遇到了麻烦，因此欢迎任何帮助和示例.

I'm having trouble to transferring files using boost, so any help and examples are welcome.

我正在使用以下代码发送压缩的消息:

I am using the following code to send compressed messages:

std::string data_
std::stringstream compressed;
std::stringstream original;

original << data_;

boost::iostreams::filtering_streambuf<boost::iostreams::input> out;
out.push(boost::iostreams::zlib_compressor());
out.push(original);
boost::iostreams::copy(out, compressed);

data_ = compressed.str();
boost::asio::write(socket_, boost::asio::buffer(data_ + '\n'));

我想知道如何压缩文件而不必将压缩后的副本保存在HD中.将字节直接保存到缓冲区中，然后发送到套接字.服务器端必须接收文件并解压缩

I want to know how to compress a file without having to save a compressed copy in the HD. Saving your bytes directly into a buffer and then send to the socket. Server-side must receive the file and decompress

推荐答案

这是我能想到的最简单的方法，它可以完成您尝试做的事情:

Here's the simplest thing I can think of that does what it appears you're trying to do:

在Coliru上直播

#include <boost/iostreams/filtering_stream.hpp>
#include <boost/iostreams/filter/gzip.hpp>
#include <boost/iostreams/copy.hpp>
#include <boost/asio.hpp>
#include <iostream>

int main() {
    std::string data_ = "hello world\n";
    boost::asio::io_service svc;

    using boost::asio::ip::tcp;
    tcp::iostream sockstream(tcp::resolver::query { "127.0.0.1", "6767" });

    boost::iostreams::filtering_ostream out;
    out.push(boost::iostreams::zlib_compressor());
    out.push(sockstream);

    out << data_;
    out.flush();
}

使用简单的命令行侦听器，例如:

Use a simple command line listener, e.g.:

netcat -l -p 6767 | zlib-flate -uncompress

当它从c ++客户端接收到数据时，会愉快地报告"hello world".

Which happily reports "hello world" when it receives the data from the c++ client.

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