I'm trying to download any files from server - images, text/html, zip etc. But somehow I have some trash in the beginning and at the end of my output file.
#include "dependencies.h" asio::streambuf response_; std::istream is(&response_); std::ofstream file("file.html", std::ios::out); void readHeader(asio::ssl::stream<tcp::socket>& socket); void asyncRead(asio::ssl::stream<tcp::socket>& socket); void readStatus(asio::ssl::stream<tcp::socket>& socket) { asio::async_read_until(socket, response_, "\r\n", [&](boost::system::error_code ec, size_t length) { if (!ec) { std::string header; is >> header; std::cout << "Protocol: " << header << '\n'; std::string status_code; std::string status; is >> status_code; std::cout << "Status: " << status_code << '\n'; std::string status_message; std::getline(is, status_message); readHeader(socket); } else if (ec != asio::error::eof) { std::cout << "[Status code] Error: " << ec.message() << '\n'; } }); } void readHeader(asio::ssl::stream<tcp::socket>& socket) { asio::async_read_until(socket, response_, "\r\n\r\n", [&](boost::system::error_code ec, size_t length) { if (!ec) { std::string status_message; while (getline(is, status_message) && status_message != "\r") std::cout << status_message << '\n'; asyncRead(socket); } else if (ec != asio::error::eof) { std::cout << "[Header message] Error: " << ec.message() << '\n'; } }); } void asyncRead(asio::ssl::stream<tcp::socket>& socket) { asio::async_read(socket, response_, asio::transfer_at_least(1), [&](const boost::system::error_code ec, size_t length) { if (!ec) { file << &response_; asyncRead(socket); } else if (ec != asio::error::eof) { std::cout << "[Async reading] Error: " << ec.what() << std::endl; } }); } int main(int args, const char* argv[]) { setlocale(LC_ALL, "Rus"); boost::system::error_code ec; asio::io_context context; asio::ssl::context sslContext(asio::ssl::context::method::sslv23_client); sslContext.set_default_verify_paths(); asio::ssl::stream<tcp::socket> socket(context, sslContext); //https://codeload.github.com/ERHZAN/NRM-Launcher/zip/refs/heads/main boost::urls::url url = boost::urls::url_view("https://en.cppreference.com/w/"); std::string path = url.path(); std::string host = url.host(); std::string scheme = url.scheme(); asio::streambuf request_; std::ostream os(&request_); os << "GET " << path << " HTTP/1.1" << "\r\n"; os << "Host: " << host << "\r\n"; os << "Accept: */*\r\n"; os << "Connection: close\r\n\r\n"; tcp::resolver resolver(context); tcp::resolver::query query(host, "https"); resolver.async_resolve(query, [&](const boost::system::error_code& ec, tcp::resolver::iterator ep_iterator) { if (!ec) { socket.set_verify_mode(boost::asio::ssl::verify_peer); socket.set_verify_callback([&](bool preverified, boost::asio::ssl::verify_context& ctx) { char subject_name[256]; X509* cert = X509_STORE_CTX_get_current_cert(ctx.native_handle()); X509_NAME_oneline(X509_get_subject_name(cert), subject_name, 256); std::cout << "Verifying " << subject_name << "\n"; return true; }); socket.lowest_layer().async_connect(ep_iterator->endpoint(), [&](const boost::system::error_code& ec) { if (!ec) { socket.async_handshake(asio::ssl::stream_base::handshake_type::client, [&](const boost::system::error_code& ec) { if (!ec) { asio::async_write(socket, request_, [&](const boost::system::error_code ec, size_t length) { if (!ec) { readStatus(socket); } else { std::cout << ec.what() << std::endl; } }); } else { std::cout << ec.what() << std::endl; } }); } else { std::cout << "[Connection] Error: " << ec.what() << std::endl; } }); } }); context.run(); return 0; } And my output file is:
ab5b <!DOCTYPE html> <html lang="en" dir="ltr" class="client-nojs"> i've deleted all html here for your convenience </html> 0 
