如何通过boost socket在C ++中发送ostream？ [英] How to send ostream via boost sockets in C++?

问题描述

我面对使用protobuf的进程间通信的一些问题。 Protobuf允许一组序列化格式：

  SerializeToArray（void * data，int size）：bool 
 SerializeToCodedStream :: protobuf :: io :: CodeOutputStream * output）：bool 
 SerializeToFileDescriptor（int file_descriptor）：bool 
 SerializeToOstream（ostream * output）
  

我的问题是，我没有线索如何使用boost asio sockets我使用，因为我实现他们发送字符串：

  boost :: asio :: write（socket，boost :: asio :: buffer（message），
 boost :: asio :: transfer_all ），ignored_error）; 
  

但我想发送ostream。

因此请写一个请求

  boost :: asio :: streambuf request; 
 std :: ostream request_stream（& request）; 
 request_stream<< GET< argv [2]< HTTP / 1.0\r\\\
; 
 request_stream<< Host：<< argv [1]<< \r\\\
; 
 request_stream<< Accept：* / * \r\\\
; 
 request_stream<< Connection：close\r\\\
\r\\\
; 
 
 //发送请求。 
 boost :: asio :: write（socket，request）; 
  

阅读回应：

  boost :: asio :: streambuf response; 
 boost :: asio :: read_until（socket，response，\r\\\
）; 
 
 //检查响应是否正常。 
 std :: istream response_stream（& response）; 
  

复制流：

  boost :: asio :: streambuf request; 
 std :: ostream request_stream（& request）; 
 request_stream<< std :: cin.rdbuf（）<< std :: flush; 
 
 //发送请求。 
 boost :: asio :: write（socket，request）; 
  

I am facing some issues with my inter-process communication using protobuf. Protobuf allows a set of serialization formats:

SerializeToArray(void * data, int size) : bool
SerializeToCodedStream(google::protobuf::io::CodeOutputStream * output) : bool
SerializeToFileDescriptor(int file_descriptor) : bool
SerializeToOstream(ostream * output)

My problem is, I have no clue how to use it with the boost asio sockets I am using, as I implemented them to send strings:

boost::asio::write(socket, boost::asio::buffer(message),
            boost::asio::transfer_all(), ignored_error);

But I would like to send the ostream.

解决方案

Boost's asio library integrates with std iostream on the level of streambuffers

So write a request

boost::asio::streambuf request;
std::ostream request_stream(&request);
request_stream << "GET " << argv[2] << " HTTP/1.0\r\n";
request_stream << "Host: " << argv[1] << "\r\n";
request_stream << "Accept: */*\r\n";
request_stream << "Connection: close\r\n\r\n";

// Send the request.
boost::asio::write(socket, request);

Read a response:

boost::asio::streambuf response;
boost::asio::read_until(socket, response, "\r\n");

// Check that response is OK.
std::istream response_stream(&response);

Copy a stream:

boost::asio::streambuf request;
std::ostream request_stream(&request);
request_stream << std::cin.rdbuf() << std::flush;

// Send the request.
boost::asio::write(socket, request);

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