C++-Mongoose(3)-http-server-https-restful

1.url structure

2.The difference between http and http-restful lies in the assignment of mg_tls_opts

2.1 Distinguishing between http and https

a) port address

static const char *s_http_addr = “http://0.0.0.0:8000”; // HTTP port

static const char *s_https_addr = “https://0.0.0.0:8443”; // HTTPS port

b) Assign value to mg_tls_opts when using https

 struct mg_tls_opts opts = {
#ifdef TLS_TWOWAY
        .ca = mg_str(s_tls_ca),
#endif
        .cert = mg_str(s_tls_cert),
        .key = mg_str(s_tls_key)};
    mg_tls_init(c, & amp;opts);
  }

3 important variables:
static const char* s_tls_ca;
static const char* s_tls_cert;
static const char* s_tls_key;

#ifdef TLS_TWOWAY
static const char* s_tls_ca =
"-----BEGIN CERTIFICATE-----\\
"
"MIIBqjCCAU + gAwIBAgIUESoOPGqMhf9uarzblVFwzrQweMcwCgYIKoZIzj0EAwIw\\
"
"RDELMAkGA1UEBhMCSUUxDzANBgNVBAcMBkR1YmxpbjEQMA4GA1UECgwHQ2VzYW50\\
"
"YTESMBAGA1UEAwwJVGVzdCBSb290MCAXDTIwMDUwOTIxNTE0NFoYDzIwNTAwNTA5\\
"
"MjE1MTQ0WjBEMQswCQYDVQQGEwJJRTEPMA0GA1UEBwwGRHVibGluMRAwDgYDVQQK\\
"
"DAdDZXNhbnRhMRIwEAYDVQQDDAlUZXN0IFJvb3QwWTATBgcqhkjOPQIBBggqhkjO\\
"
"PQMBBwNCAAQsq9ECZiSW1xI + CVBP8VDuUehVA166sR2YsnJ5J6gbMQ1dUCH/QvLa\\
"
"dBdeU7JlQcH8hN5KEbmM9BnZxMor6ussox0wGzAMBgNVHRMEBTADAQH/MAsGA1Ud\\
"
"DwQEAwIBrjAKBggqhkjOPQQDAgNJADBGAiEAnHFsAIwGQQyRL81B04dH6d86Iq0l\\
"
"fL8OKzndegxOaB0CIQCPwSIwEGFdURDqCC0CY2dnMrUGY5ZXu3hHCojZGS7zvg==\\
"
"-----END CERTIFICATE-----\\
";
#endif
static const char* s_tls_cert =
"-----BEGIN CERTIFICATE-----\\
"
"MIIBhzCCASygAwIBAgIUbnMoVd8TtWH1T09dANkK2LU6IUswCgYIKoZIzj0EAwIw\\
"
"RDELMAkGA1UEBhMCSUUxDzANBgNVBAcMBkR1YmxpbjEQMA4GA1UECgwHQ2VzYW50\\
"
"YTESMBAGA1UEAwwJVGVzdCBSb290MB4XDTIwMDUwOTIxNTE0OVoXDTMwMDUwOTIx\\
"
"NTE0OVowETEPMA0GA1UEAwwGc2VydmVyMFkwEwYHKoZIzj0CAQYIKoZIzj0DAQcD\\
"
"QgAEkuBGnInDN6l06zVVQ1VcrOvH5FDu9MC6FwJc2e201P8hEpq0Q/SJS2nkbSuW\\
"
"H/wBTTBaeXN2uhlBzMUWK790KKMvMC0wCQYDVR0TBAIwADALBgNVHQ8EBAMCA6gw\\
"
"EwYDVR0lBAwwCgYIKwYBBQUHAwEwCgYIKoZIzj0EAwIDSQAwRgIhAPo6xx7LjCdZ\\
"
"QY133XvLjAgVFrlucOZHONFVQuDXZsjwAiEAzHBNligA08c5U3SySYcnkhurGg50\\
"
"BllCI0eYQ9ggp/o=\\
"
"-----END CERTIFICATE-----\\
";

static const char* s_tls_key =
"-----BEGIN PRIVATE KEY-----\\
"
"MIGHAgEAMBMGByqGSM49AgEGCCqGSM49AwEHBG0wawIBAQQglNni0t9Dg9icgG8w\\
"
"kbfxWSS + TuNgbtNybIQXcm3NHpmhRANCAASS4EacicM3qXTrNVVDVVys68fkUO70\\
"
"wLoXAlzZ7bTU/yESmrRD9IlLaeRtK5Yf/AFNMFp5c3a6GUHMxRYrv3Qo\\
"
"-----END PRIVATE KEY-----\\
";

2.2code

restfulserver_fn function

static void restfulserver_fn(struct mg_connection *c, int ev, void *ev_data, void *fn_data)
{
  if (ev == MG_EV_ACCEPT & amp; & amp; fn_data != NULL) //1. If the message MG_EV_ACCEPT is received
  {
      struct mg_tls_opts opts = //1.1. Structure assignment
      {
          #ifdef TLS_TWOWAY
            .ca = mg_str(s_tls_ca),
          #endif
             .cert = mg_str(s_tls_cert),
             .key = mg_str(s_tls_key)
        };
       mg_tls_init(c, & amp;opts); //1.2 put into context
   }


  if (ev == MG_EV_HTTP_MSG) //2. If the message MG_EV_HTTP_MSG is received
  {
      struct mg_http_message *hm = (struct mg_http_message *) ev_data;
      //1.get request, display
      if (mg_http_match_uri(hm, "/api/stats"))
      {
      // Print some statistics about currently established connections
          mg_printf(c, "HTTP/1.1 200 OK\r\\
Transfer-Encoding: chunked\r\\
\r\\
");
          mg_http_printf_chunk(c, "ID PROTO TYPE LOCAL REMOTE\\
");
          for (struct mg_connection *t = c->mgr->conns; t != NULL; t = t->next)
          {
              mg_http_printf_chunk(c, "%-3lu %4s %s %M %M\\
", t->id,
                                 t->is_udp ? "UDP" : "TCP",
                                 t->is_listening ? "LISTENING"
                                 : t->is_accepted ? "ACCEPTED "
                                                  : "CONNECTED",
                             mg_print_ip, & amp;t->loc, mg_print_ip, & amp;t->rem);
         }
         mg_http_printf_chunk(c, ""); // Don't forget the last empty chunk
      }
      //2.post request returns result
      else if (mg_http_match_uri(hm, "/api/f2/*"))
      {
         mg_http_reply(c, 200, "", "{"result": "%.*s"}\\
", (int) hm->uri .len,
                    hm->uri.ptr);
      }
      //3. Display the current directory file list

      else
      {
         struct mg_http_serve_opts opts = {.root_dir = s_root_dir};
         mg_http_serve_dir(c, ev_data, & amp;opts);
      }
  }
  (void) fn_data;
}

main function

void main()
{
struct mg_mgr mgr; // Event manager
mg_log_set(MG_LL_DEBUG); // Set log level
mg_mgr_init( & amp;mgr); // Initialize event manager
mg_http_listen( & amp;mgr, s_http_addr, restfulserver_fn, NULL); // Create HTTP listener
mg_http_listen( & amp;mgr, s_https_addr, restfulserver_fn, (void*)1); // HTTPS listener
for (;;) mg_mgr_poll( & amp;mgr, 1000); // Infinite event loop
mg_mgr_free( & amp;mgr);
}

2.3 Test

Start httpserver program
1.2.1 Browser access: http://127.0.0.1:8000:
A list of exe program root directory files will be displayed
1.2.2 Browser access: http://127.0.0.1:8000/api/stats:
will display:


1.2.3 Use postman: Send post request:
http://127.0.0.1:8000/api/f2/*,

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