Add webserver flag, allowing to disable web server entirely

Previously the web server would always start and there was no way to
tell mollysocket to intentionally run air gapped. This patch adds a
new config option to allow preventing the web server from starting.

README.md

@@ -53,6 +53,7 @@ The configuration file uses the [TOML format](https://toml.io/). Below is an ove
 |                        | MOLLY_CONF                 | -c \*       | Path to the configuration file, optional          |                      | /etc/mollysocket.conf                                   |
 | host                   | MOLLY_HOST              \* |             | Listening address of the web server               | 127.0.0.1            | 0.0.0.0                                                 |
 | port                   | MOLLY_PORT              \* |             | Listening port of the web server                  | 8020                 | 8080                                                    |
+| webserver              | MOLLY_WEBSERVER         \* |             | Wether to start the web server                    | true                 | false                                                   |
 | allowed_endpoints      | MOLLY_ALLOWED_ENDPOINTS \* |             | List of UnifiedPush servers                       | `["*"]`              | `["*"]`,`["https://yourdomain.tld","https://ntfy.sh"]`  |
 | allowed_uuids          | MOLLY_ALLOWED_UUIDS     \* |             | UUIDs of signal accounts that may use this server | `["*"]`              | `["*"]`, `["abcdef-12345-tuxyz-67890"]`                 |
 | db                     | MOLLY_DB                \* |             | Path to the DB                                    | `db.sqlite`          | `"/data/ms.sqlite"`                                     |

config-sample.toml

@@ -1,4 +1,5 @@
 db = '/opt/mollysocket/mollysocket.db'
 allowed_endpoints = ['*']
 allowed_uuids = ['*']
+webserver = true
 port = 8020

src/config.rs

@@ -20,6 +20,7 @@ pub enum SignalEnvironment {
 struct Config {
     host: String,
     port: u16,
+    webserver: bool,
     signal_env: SignalEnvironment,
     allowed_endpoints: Vec<String>,
     allowed_uuids: Vec<String>,
@@ -38,6 +39,7 @@ impl Default for Config {
         Self {
             host: String::from("127.0.0.1"),
             port: 8020,
+            webserver: true,
             signal_env: SignalEnvironment::Production,
             allowed_endpoints: vec![String::from("*")],
             allowed_uuids: vec![String::from("*")],
@@ -66,6 +68,10 @@ pub fn is_uuid_valid(uuid: &str) -> bool {
     get_cfg().is_uuid_valid(uuid)
 }
 
+pub fn should_start_webserver() -> bool {
+    get_cfg().webserver
+}
+
 pub fn get_ws_endpoint(uuid: &str, devide_id: u32, password: &str) -> String {
     get_cfg().get_ws_endpoint(uuid, devide_id, password)
 }

src/server/web.rs

@@ -164,6 +164,11 @@ fn gen_rep(mut map: HashMap<String, String>) -> Json<Response> {
 }
 
 pub async fn launch() {
+    if !config::should_start_webserver() {
+        log::warn!("The web server is disabled, making mollysocket run in an air gapped mode. With this clients are less easy to set up and push might break.");
+        return;
+    }
+
     let rocket_cfg = rocket::Config::figment()
         .merge(("address", &config::get_host()))
         .merge(("port", &config::get_port()));