120 lines
3.0 KiB
C++
120 lines
3.0 KiB
C++
#include "common/Email.h"
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#include <drogon/drogon.h>
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#include <array>
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#include <cstring>
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#include <string>
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#include <netdb.h>
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#include <sys/socket.h>
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#include <unistd.h>
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namespace visione::email
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{
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namespace
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{
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std::string configString(const std::string &key, const std::string &fallback)
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{
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const auto &mail = drogon::app().getCustomConfig()["mail"];
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return mail.get(key, fallback).asString();
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}
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int configInt(const std::string &key, int fallback)
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{
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const auto &mail = drogon::app().getCustomConfig()["mail"];
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return mail.get(key, fallback).asInt();
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}
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bool readResponse(int socket)
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{
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std::array<char, 512> buffer{};
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const auto count = recv(socket, buffer.data(), buffer.size() - 1, 0);
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return count > 0 && buffer[0] >= '2' && buffer[0] <= '3';
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}
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bool sendLine(int socket, const std::string &line)
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{
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const auto payload = line + "\r\n";
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return send(socket, payload.data(), payload.size(), 0) ==
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static_cast<ssize_t>(payload.size());
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}
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bool sendCommand(int socket, const std::string &line)
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{
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return sendLine(socket, line) && readResponse(socket);
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}
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} // namespace
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bool EmailService::sendOtp(const std::string &to, const std::string &code) const
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{
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const auto host = configString("smtp_host", "127.0.0.1");
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const auto port = std::to_string(configInt("smtp_port", 1025));
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const auto from = configString("from", "[email protected]");
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addrinfo hints{};
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hints.ai_family = AF_UNSPEC;
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hints.ai_socktype = SOCK_STREAM;
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addrinfo *addresses = nullptr;
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if (getaddrinfo(host.c_str(), port.c_str(), &hints, &addresses) != 0)
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{
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return false;
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}
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int smtp = -1;
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for (auto *address = addresses; address != nullptr; address = address->ai_next)
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{
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smtp = socket(address->ai_family, address->ai_socktype, address->ai_protocol);
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if (smtp < 0)
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{
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continue;
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}
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if (connect(smtp, address->ai_addr, address->ai_addrlen) == 0)
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{
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break;
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}
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close(smtp);
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smtp = -1;
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}
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freeaddrinfo(addresses);
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if (smtp < 0)
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{
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return false;
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}
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const auto closeSocket = [&smtp]() {
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if (smtp >= 0)
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{
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close(smtp);
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smtp = -1;
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}
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};
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if (!readResponse(smtp) || !sendCommand(smtp, "HELO visione.local") ||
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!sendCommand(smtp, "MAIL FROM:<" + from + ">") ||
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!sendCommand(smtp, "RCPT TO:<" + to + ">") ||
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!sendCommand(smtp, "DATA"))
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{
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closeSocket();
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return false;
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}
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const std::string body =
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"From: Visione <" + from + ">\r\n"
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"To: " + to + "\r\n"
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"Subject: Codice OTP Visione\r\n"
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"Content-Type: text/plain; charset=UTF-8\r\n"
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"\r\n"
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"Il tuo codice OTP per Visione e': " + code + "\r\n"
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"Scade tra 10 minuti.\r\n"
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".";
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const auto ok = sendCommand(smtp, body) && sendCommand(smtp, "QUIT");
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closeSocket();
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return ok;
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}
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} // namespace visione::email
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