boost-asio

问题 I'm experimenting with Boost::asio, and I'm trying to make a client that reads and outputs to console packets sent from a server. The server uses a proprietary protolcol. It sends a timer update every second, responds to ping, and can reply with a list of files when the client asks for it. I have a decent grasp of asynchronous networking, but I'm having a problem. Here's the code: class JReader { public: JReader(boost::asio::io_service &io_s) : socket_(io_s) { tcp::resolver resolver(io_s);

问题 I've ported a long-working stable library written in C++ and Boost to Blackberry 10. The library transfers files between devices. The library compiles and links well, and runs just fine. However, I consistently encounter a thrown exception on my Blackberry 10 device after 1, 2, or 3 files have been transferred. Catching the exception as a boost::system::system_error in the source code shows it is exception 16, with a text of "mutex: Resource busy". Here is the source code where the exception

问题 I'm trying to get both the ipv4 and ipv6 address from any string address, be it by ipv4, ipv6, or DNS address. I can create my own function to do so, but I'm trying to take expert advice and utilize built-in capabilities. Is there a way to input an address string of any format, and have both ipv4 and ipv6 boost addresses returned? 回答1: Getting an address from the DNS name involves... querying a naming server (DNS!). If you want to enumerate the results, use a resolver in asio: http://www

问题 I have been working with boost::asio for a while now and while I do understand the concept of the asynchronous calls I am still somewhat befuddled by the memory management implications. In normal synchrous code the object lifetime is clear. But consider a scenario similar to the case of the daytime server: There might be multiple active connections which have been accept ed. Each connection now sends and receives some data from a socket, does some work internally and then decides to close the

问题 I want to connect to a server socket specified by a destination ip address and port number. boost::asio::connect seems it does not allow to use this. I have ip destination as a unsigned int value. Update: I am able to do ba::ip::tcp::endpoint endpoint( ba::ip::address(ba::ip::address_v4(req.IpDst())), ntohs(req.Port())); But how can I use endpoint with connect ? 回答1: It is possible to use: socket.connect(endpoint); 来源： https://stackoverflow.com/questions/9040424/boost-asio-connect-using-an-ip

问题 I am currently working on a UDP socket client. I am currently noticing a memory leak and I've tried several things in hopes to squash it, but it still prevails. In my main, I have a char* that has been malloc 'd. I then call the below function to send the data: void Send(const char* data, const int size) { Socket.async_send_to(boost::asio::buffer(data, size), Endpoint, boost::bind(&MulticastSender::HandleSendTo, this, boost::asio::placeholders::error)); } If I run this code, it will always

问题 There are a lot of examples how to make HTTP request to a server and get reply via boost.asio library. However, I couldn't find a good example of simple interface and wondering, if I need to implement it myself. For instance, if I need to get content of http://www.foo.bar/path/to/default.html , is there any way to get a content without validating URL, making HTTP request and parsing server answer? Basically, I am looking for something like this: std::string str = boost::asio::get_content(

问题 Does anyone have an example illustrating the difference between boost::asio::io_service::poll and boost::asio::io_service::run ? More specifically what is the difference between calling join_all() on a thread_group executing run() and on another one executing poll() ? Do both guarantee that all events have finished? In the documentation available at http://www.boost.org/doc/libs/1_53_0/doc/html/boost_asio/reference/io_service/run/overload1.html, it is said: The poll() function may also be

问题 First i asked this Running a function on the main thread from a boost thread and passing parameters to that function so now i am trying this: The following is a console c++ project where i perfectly simulated my big project TestServicePost.cpp #include "stdafx.h" #include "SomeClass.h" int _tmain(int argc, _TCHAR* argv[]) { SomeClass* s = new SomeClass(); while(true) { s->update(); } return 0; } SomeClass.h #include <boost/thread.hpp> #include <boost/asio.hpp> #include <queue> class

问题 As noted by this question, boost::asio now can use the C++11 chrono objects if they are available. However, the following code compiles with but not with clang 3.6.0-svn223366-1~exp1 #include <iostream> #include <boost/chrono.hpp> #include <boost/bind.hpp> #include <boost/asio.hpp> #include <boost/asio/steady_timer.hpp> #include <chrono> #include <thread> #include <functional> boost::asio::io_service ioservice; boost::asio::steady_timer timer(ioservice); void function() { std::cout <<