add socketio, http post & get

src/Http.cpp

@@ -0,0 +1,143 @@
+#include "Http.h"
+
+#include "CustomAssert.h"
+#include <boost/asio/connect.hpp>
+#include <boost/asio/ip/tcp.hpp>
+#include <boost/beast.hpp>
+#include <boost/beast/ssl.hpp>
+
+namespace beast = boost::beast; // from <boost/beast.hpp>
+namespace http = beast::http; // from <boost/beast/http.hpp>
+namespace net = boost::asio; // from <boost/asio.hpp>
+namespace ssl = net::ssl; // from <boost/asio/ssl.hpp>
+using tcp = net::ip::tcp; // from <boost/asio/ip/tcp.hpp>
+
+std::string Http::GET(const std::string& host, int port, const std::string& target) {
+    // FIXME: doesn't support https
+    // if it causes issues, yell at me and I'll fix it asap. - Lion
+    try {
+        net::io_context io;
+        tcp::resolver resolver(io);
+        beast::tcp_stream stream(io);
+        auto const results = resolver.resolve(host, std::to_string(port));
+        stream.connect(results);
+
+        http::request<http::string_body> req { http::verb::get, target, 11 /* http 1.1 */ };
+
+        req.set(http::field::host, host);
+        // tell the server what we are (boost beast)
+        req.set(http::field::user_agent, BOOST_BEAST_VERSION_STRING);
+
+        http::write(stream, req);
+
+        // used for reading
+        beast::flat_buffer buffer;
+        http::response<http::string_body> response;
+
+        http::read(stream, buffer, response);
+
+        std::string result(response.body());
+
+        beast::error_code ec;
+        stream.socket().shutdown(tcp::socket::shutdown_both, ec);
+        if (ec && ec != beast::errc::not_connected) {
+            throw beast::system_error { ec }; // goes down to `return "-1"` anyways
+        }
+
+        return result;
+
+    } catch (const std::exception& e) {
+        error(e.what());
+        return "-1";
+    }
+}
+
+std::string Http::POST(const std::string& host, const std::string& target, const std::unordered_map<std::string, std::string>& fields, const std::string& body, bool json) {
+    try {
+        net::io_context io;
+
+        // The SSL context is required, and holds certificates
+        ssl::context ctx(ssl::context::tlsv13);
+
+        ctx.set_verify_mode(ssl::verify_none);
+
+        tcp::resolver resolver(io);
+        beast::ssl_stream<beast::tcp_stream> stream(io, ctx);
+        decltype(resolver)::results_type results;
+        auto try_connect_with_protocol = [&](tcp protocol) {
+            try {
+                results = resolver.resolve(protocol, host, std::to_string(443));
+                if (!SSL_set_tlsext_host_name(stream.native_handle(), host.c_str())) {
+                    boost::system::error_code ec { static_cast<int>(::ERR_get_error()), boost::asio::error::get_ssl_category() };
+                    // FIXME: we could throw and crash, if we like
+                    // throw boost::system::system_error { ec };
+                    debug("POST " + host + target + " failed.");
+                    return false;
+                }
+                beast::get_lowest_layer(stream).connect(results);
+            } catch (const boost::system::system_error&) {
+                return false;
+            }
+            return true;
+        };
+        //bool ok = try_connect_with_protocol(tcp::v6());
+        //if (!ok) {
+        //debug("IPv6 connect failed, trying IPv4");
+        bool ok = try_connect_with_protocol(tcp::v4());
+        if (!ok) {
+            error("failed to resolve or connect in POST " + host + target);
+            return "-1";
+        }
+        //}
+        stream.handshake(ssl::stream_base::client);
+        http::request<http::string_body> req { http::verb::post, target, 11 /* http 1.1 */ };
+
+        req.set(http::field::host, host);
+        if (!body.empty()) {
+            if (json) {
+                // FIXME: json is untested.
+                req.set(http::field::content_type, "application/json");
+            } else {
+                req.set(http::field::content_type, "application/x-www-form-urlencoded");
+            }
+            req.set(http::field::content_length, std::to_string(body.size()));
+            req.body() = body;
+            // info("body is " + body + " (" + req.body() + ")");
+            // info("content size is " + std::to_string(body.size()) + " (" + boost::lexical_cast<std::string>(body.size()) + ")");
+        }
+        for (const auto& pair : fields) {
+            // info("setting " + pair.first + " to " + pair.second);
+            req.set(pair.first, pair.second);
+        }
+
+        std::stringstream oss;
+        oss << req;
+
+        beast::get_lowest_layer(stream).expires_after(std::chrono::seconds(5));
+
+        http::write(stream, req);
+
+        // used for reading
+        beast::flat_buffer buffer;
+        http::response<http::string_body> response;
+
+        http::read(stream, buffer, response);
+
+        std::stringstream result;
+        result << response;
+
+        beast::error_code ec;
+        stream.shutdown(ec);
+        // IGNORING ec
+
+        // info(result.str());
+        std::string debug_response_str;
+        std::getline(result, debug_response_str);
+        debug("POST " + host + target + ": " + debug_response_str);
+        return std::string(response.body());
+
+    } catch (const std::exception& e) {
+        error(e.what());
+        return "-1";
+    }
+}