#include <boost/asio.hpp> #define using_ssl //是否加密 #ifdef using_ssl #include <boost/asio/ssl.hpp> #endif using boost::asio::ip::tcp; using std::string; int post(const string& host, const string& port, const string& page, const string& data, string& reponse_data) { try { boost::asio::io_service io_service; //如果io_service存在复用的情况 // if(io_service.stopped()) // io_service.reset(); // 从dns取得域名下的所有ip tcp::resolver resolver(io_service); tcp::resolver::query query(host, port); tcp::resolver::iterator endpoint_iterator = resolver.resolve(query); // 尝试连接到其中的某个ip直到成功 #ifdef using_ssl boost::asio::ssl::context context(boost::asio::ssl::context::sslv23); context.set_default_verify_paths(); boost::asio::ssl::stream<boost::asio::ip::tcp::socket> socket(io_service, context); socket.set_verify_mode(boost::asio::ssl::context::verify_none); boost::asio::connect(socket.lowest_layer(), endpoint_iterator); socket.handshake(boost::asio::ssl::stream_base::client); #else tcp::socket socket(io_service); boost::asio::connect(socket, endpoint_iterator); #endif // 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 << "post " << page << " http/1.1rn"; request_stream << "host: " << host << "rn"; request_stream << "content-length: " << data.length() << "rn"; // content-type: 视实际情况修改,or“application/octet-stream” request_stream << "content-type: application/json; charset=utf-8rn"; request_stream << "accept: */*rn"; request_stream << "connection: closernrn"; request_stream << data; // 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, "rn"); // 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/") { reponse_data = "invalid response"; return -2; } // 如果服务器返回非200都认为有错,不支持301/302等跳转 if (status_code != 200) { std::stringstream oss; oss << "response returned with status code" << " : " << status_code; reponse_data = oss.str(); return -3; } // 传说中的包头可以读下来了 std::string header; std::vector<string> headers; // string content_length_header("content-length: "); // size_t content_length = 0; while (std::getline(response_stream, header) && header != "r") { /* if(string::npos != header.find(content_length_header)) { string tmp(header.substr(content_length_header.size())); stringstream ss; ss << tmp; ss >> content_length; }*/ headers.push_back(header); //std::cout << header << std::endl; } // 读取所有剩下的数据作为包体 boost::system::error_code error; while (boost::asio::read(socket, response, boost::asio::transfer_at_least(1), error)) { } // 返回值为eof,认为是正确的 if (error != boost::asio::error::eof && error.value() != 0x140000db) { std::stringstream oss; oss << error.value() << " : " << error.message(); reponse_data = oss.str(); return -4; } //响应有数据 if (response.size()) { std::istream response_stream(&response); std::istreambuf_iterator<char> eos; reponse_data = string(std::istreambuf_iterator<char>(response_stream), eos); } } catch(std::exception& e) { reponse_data = e.what(); return -1; } return 0; }
参考资料:
跨平台c++/boost/asio 简单的http post请求 客户端模型
https://www.cnblogs.com/linbc/p/5034286.html
c++ post/get请求(boost.asio库)
https://blog.csdn.net/csnd_ayo/article/details/64437935
boost::asio ssl
https://blog.csdn.net/aalbertini/article/details/38300757
基于boost asio实现的支持ssl的通用socket框架
https://www.xuebuyuan.com/2178001.html
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