HTTPS redirector for Mongoose

main.c

static const char *s_http_addr = "https://0.0.0.0:8000";
static const char *s_https_addr = "https://0.0.0.0:8443";

// Self signed certificates, see
// https://github.com/cesanta/mongoose/blob/master/test/certs/generate.sh
static const char *s_tls_cert =
    "-----BEGIN CERTIFICATE-----\n"
    "MIIBMTCB2aADAgECAgkAluqkgeuV/zUwCgYIKoZIzj0EAwIwEzERMA8GA1UEAwwI\n"
    "TW9uZ29vc2UwHhcNMjQwNTA3MTQzNzM2WhcNMzQwNTA1MTQzNzM2WjARMQ8wDQYD\n"
    "VQQDDAZzZXJ2ZXIwWTATBgcqhkjOPQIBBggqhkjOPQMBBwNCAASo3oEiG+BuTt5y\n"
    "ZRyfwNr0C+SP+4M0RG2pYkb2v+ivbpfi72NHkmXiF/kbHXtgmSrn/PeTqiA8M+mg\n"
    "BhYjDX+zoxgwFjAUBgNVHREEDTALgglsb2NhbGhvc3QwCgYIKoZIzj0EAwIDRwAw\n"
    "RAIgTXW9MITQSwzqbNTxUUdt9DcB+8pPUTbWZpiXcA26GMYCIBiYw+DSFMLHmkHF\n"
    "+5U3NXW3gVCLN9ntD5DAx8LTG8sB\n"
    "-----END CERTIFICATE-----\n";

static const char *s_tls_key =
    "-----BEGIN EC PRIVATE KEY-----\n"
    "MHcCAQEEIAVdo8UAScxG7jiuNY2UZESNX/KPH8qJ0u0gOMMsAzYWoAoGCCqGSM49\n"
    "AwEHoUQDQgAEqN6BIhvgbk7ecmUcn8Da9Avkj/uDNERtqWJG9r/or26X4u9jR5Jl\n"
    "4hf5Gx17YJkq5/z3k6ogPDPpoAYWIw1/sw==\n"
    "-----END EC PRIVATE KEY-----\n";

// HTTPS listener serves requests
static void https_ev_handler(struct mg_connection *c, int ev, void *ev_data) {
  if (ev == MG_EV_ACCEPT && c->is_tls) {
    struct mg_tls_opts opts;
    memset(&opts, 0, sizeof(opts));
    opts.cert = mg_str(s_tls_cert);
    opts.key = mg_str(s_tls_key);
    mg_tls_init(c, &opts);
  }

  if (ev == MG_EV_HTTP_MSG) {
    struct mg_http_message *hm = (struct mg_http_message *) ev_data;
    char buf[256];
    mg_snprintf(buf, sizeof(buf), "Location: %s%.*s\r\n", s_http_addr,
                hm->uri.len, hm->uri.buf);
    mg_http_reply(c, 302, buf, "%s", buf);  // 302 redirect
  }
}