c++ - cpp-netlib hello world 示例不会在 linux 上编译

Question

我尝试在 Ubuntu 16.04 上使用 cpp-netlib-0.12.0 和 boost-1.64.0 在 cpp-netlib.org 上运行 hello world 示例。一段代码是(来自第 1 行):

#include <boost/network/protocol/http/server.hpp>
#include <iostream>

namespace http = boost::network::http;

struct hello_world;
typedef http::server<hello_world> server;

struct hello_world
{
    void operator()(server::request const &request, server::response &response)
    {
        server::string_type ip = source(request);
        unsigned int port = request.source_port;
        std::ostringstream data;
        data << "Hello, " << ip << ':' << port << '!';
        response = server::response::stock_reply(server::response::ok, data.str());
    }
    void log(const server::string_type& message)
    {
        std::cerr << "ERROR: " << message << std::endl;
    }
};

当我使用以下行进行编译时:

g++ test1.cpp -o test1 -std=c++11 -lcppnetlib-uri -lcppnetlib-server-parsers -lcppnetlib-client-connections -lboost_system -lboost_thread -lpthread

我收到以下错误:

test1.cpp:11:61: error: ‘boost::network::http::server<hello_world>::response’ has not been declared
     void operator()(server::request const &request, server::response &response)
                                                             ^
test1.cpp: In member function ‘void hello_world::operator()(const request&, int&)’:
test1.cpp:17:28: error: ‘boost::network::http::server<hello_world>::response’ has not been declared
         response = server::response::stock_reply(server::response::ok, data.str());
                            ^
test1.cpp:17:58: error: ‘boost::network::http::server<hello_world>::response’ has not been declared
         response = server::response::stock_reply(server::response::ok, data.str());
                                                          ^

我直接从网站上的示例中提取了代码。我检查了包含路径，所有必要的库似乎都在那里。我似乎无法弄清楚问题出在哪里。

Answer 1

看起来 cpp-netlib 的文档都乱七八糟(就像整个项目一样)。 HTTP server API page坚持 http::server 的 Handler 模板参数应该有成员 operator () 以 connection_ptr 作为第二个参数(虽然它建议错误的包括):

#include <boost/network/protocol/http/server.hpp>
#include <boost/network/utils/thread_pool.hpp>

struct handler_type;
typedef boost::network::http::server<handler_type> http_server;

struct handler_type
{
    void
    operator ()
    (
        http_server::request const & request,
        http_server::connection_ptr  connection
    )
    {
        // do something here
    }
};