我发现自己也在与boost
为了发送一些“定制的”HTTP GET 请求 - 我在我的 Ubuntu 机器(16.04)上本地运行服务器。
就我而言,请求是我的服务器实现的某些专有 API(与其数据库中保存的单词相关),但您可以修改queryStr
变量来保存您想要的任何查询字符串。
另外,更改argv[1]
and argv[2]
当您运行程序来保存所需的值(IP 地址、查询和端口(如果需要)时,默认值为 80)。
#include <iostream>
#include <istream>
#include <ostream>
#include <string>
#include <boost/asio.hpp>
using boost::asio::ip::tcp;
using namespace std;
int main(int argc, char* argv[])
{
cout << "main -start" << endl;
try
{
boost::asio::io_service io_service;
string ipAddress = argv[1]; //"localhost" for loop back or ip address otherwise, i.e.- www.boost.org;
string portNum = argv[2]; //"8000" for instance;
string hostAddress;
if (portNum.compare("80") != 0) // add the ":" only if the port number is not 80 (proprietary port number).
{
hostAddress = ipAddress + ":" + portNum;
}
else
{
hostAddress = ipAddress;
}
string wordToQuery = "aha";
string queryStr = argv[3]; //"/api/v1/similar?word=" + wordToQuery;
// Get a list of endpoints corresponding to the server name.
tcp::resolver resolver(io_service);
tcp::resolver::query query(ipAddress, portNum);
tcp::resolver::iterator endpoint_iterator = resolver.resolve(query);
// Try each endpoint until we successfully establish a connection.
tcp::socket socket(io_service);
boost::asio::connect(socket, endpoint_iterator);
// Form the request. We specify the "Connection: close" header so that the
// server will close the socket after transmitting the response. This will
// allow us to treat all data up until the EOF as the content.
boost::asio::streambuf request;
std::ostream request_stream(&request);
request_stream << "GET " << queryStr << " HTTP/1.1\r\n"; // note that you can change it if you wish to HTTP/1.0
request_stream << "Host: " << hostAddress << "\r\n";
request_stream << "Accept: */*\r\n";
request_stream << "Connection: close\r\n\r\n";
// Send the request.
boost::asio::write(socket, request);
// Read the response status line. The response streambuf will automatically
// grow to accommodate the entire line. The growth may be limited by passing
// a maximum size to the streambuf constructor.
boost::asio::streambuf response;
boost::asio::read_until(socket, response, "\r\n");
// Check that response is OK.
std::istream response_stream(&response);
std::string http_version;
response_stream >> http_version;
unsigned int status_code;
response_stream >> status_code;
std::string status_message;
std::getline(response_stream, status_message);
if (!response_stream || http_version.substr(0, 5) != "HTTP/")
{
std::cout << "Invalid response\n";
return 1;
}
if (status_code != 200)
{
std::cout << "Response returned with status code " << status_code << "\n";
return 1;
}
// Read the response headers, which are terminated by a blank line.
boost::asio::read_until(socket, response, "\r\n\r\n");
// Process the response headers.
std::string header;
while (std::getline(response_stream, header) && header != "\r")
{
std::cout << header << "\n";
}
std::cout << "\n";
// Write whatever content we already have to output.
if (response.size() > 0)
{
std::cout << &response;
}
// Read until EOF, writing data to output as we go.
boost::system::error_code error;
while (boost::asio::read(socket, response,boost::asio::transfer_at_least(1), error))
{
std::cout << &response;
}
if (error != boost::asio::error::eof)
{
throw boost::system::system_error(error);
}
}
catch (std::exception& e)
{
std::cout << "Exception: " << e.what() << "\n";
}
return 0;
}
我遵循的原始示例在这里:Boost-simple-http-get-request-sync-client