boost

问题 I need to expose an async REST api for c++ clients, that internally uses boost::beast for sending REST requests / receiving responses. The starting point is http_client_async.cpp example. Now the client will pass a callback function using this async api, that needs to be called at the end of the REST operation from the on_read() handler[http_client_async.cpp], passing the full response back to the caller. How can i achieve this? 回答1: but is there any way to invoke thie _callback through asio

问题 I need to expose an async REST api for c++ clients, that internally uses boost::beast for sending REST requests / receiving responses. The starting point is http_client_async.cpp example. Now the client will pass a callback function using this async api, that needs to be called at the end of the REST operation from the on_read() handler[http_client_async.cpp], passing the full response back to the caller. How can i achieve this? 回答1: but is there any way to invoke thie _callback through asio

问题 boost::multi_index_container enables the construction of containers maintaining one or more indices with different sorting and access semantics like relational database. And I use boost::multi_index_container with composite key to handle something like this: struct Person { Person(int id, string name): m_id(id), m_name(name) { } int m_id; string m_name; }; typedef multi_index_container< Person, indexed_by< ordered_unique< member<Person, int, &Person::m_id> >, ordered_unique< composite_key<

问题 I'm trying to parse unregistered options in any number of files provided at command line. Let's say I have files: configs0.ini configs1.ini configs2.ini And I wanted to support any number of these. My code (simplified): namespace po = boost::program_options; po::options_description cmd_opts{"Options"}; po::options_description config_file_opts; po::variables_map vm; cmd_opts.add_options() ("help,h", "Help message") ("config_files", po::value<std::vector<std::string>>()->multitoken(),

问题 I've boost 1.54 installed in Linux Debian (according to this). Then I installed bjam as follows: apt-get install bjam Then, in order to run a sample tut1 program with boost filesystem I typed: $ cd boost-root/libs/filesystem/example/test $ ./setup.sh $ ./bld.sh This should result in building tut1 file. But there is no tut1 file in test folder. There is only tut1.cpp copied here by setup.sh . I suspect the bjam installed is not for boost 1.54. How to install bjam properly? After typing bjam I

问题 I want to use Boost Numpy (boost version 1.72) with Visual Studio 2017 and Python 3.8. In my test program which includes I get a link error "boost_numpy38-vc141-mt-gd-x32-1_72.lib". I cannot find the file "boost_numpy38-vc141-mt-gd-x32-1_72.lib" anywhere, it is not created when building the binaries (bootstrap + .\b2) and it is nowhere to be found on the binary repositories at Sourceforge (https://sourceforge.net/projects/boost/files/boost-binaries/ ). Anybody any clue? 回答1: Building Boost

问题 I'm just creating a very simple C++ class that provides me a few methods, like connect() and read() , instead of exposing all the Boost.Asio socket calls. Right now, I'm trying to find out how to create a method that reads only the desired amount of bytes: SocketClient::read(int bytes, char* data); //reads desired amount of bytes and puts them in data, size of data>bytes! Unfortunately, I found no read_byte function in Boost.Asio. I do not want to drop bytes that have been received, but not

问题 I need to convert IPv6 string address into boost::multiprecision::uint128_t For IPv4 I used the following algorithm: uint32_t byte1 = 0, byte2 = 0, byte3 = 0, byte4 = 0; sscanf(ipAddress, "%3d.%3d.%3d.%3d", &byte1, &byte2, &byte3, &byte4); uint32_t ip = (byte1 << 24) | (byte2 << 16) | (byte3 << 8) | (byte4); How can I do like this for IPv6? 回答1: Using the example from Wikipedia: Also using Boost Asio's address_v6 implementation instead of a 1970-era parsing: Live On Coliru #include <boost

问题 I am using boost asio for my TCP Server, in this I am using async_read_some for reading . Application is working fine when network is connected, normal connection closing are handled correctly like (EOF,abrupt closing). But my problem is I am not getting any error when network cable is unplugged. socket is open , and I get error when I am writing on socket. This is the way socket work. Question: Can this is handled in Boost asio by any method? 回答1: You may want to set "keep alive" on the

问题 In short, I'd like to know how boost::serialization allocates memory for an object when deserializing through a pointer. Below, you'll find an example of my question, clearly illustrated alongside companion code. This code should be fully functional and compile fine, there are no errors, per se, just a question on how the code actually works. #include <cstddef> // NULL #include <iomanip> #include <iostream> #include <fstream> #include <string> #include <boost/archive/text_iarchive.hpp>