Add option to skip token validation

Signed-off-by: Jens Reidel <adrian@travitia.xyz>

README.md

@@ -34,6 +34,7 @@ Create a file `config.json` and fill in these fields as you wish:
   },
   "status": "idle",
   "backpressure": 100,
+  "validate_token": true,
   "externally_accessible_url": "ws://localhost:7878",
   "cache": {
     "channels": false,
@@ -50,7 +51,7 @@ Create a file `config.json` and fill in these fields as you wish:
 }
 ```
 
-You can omit the `token` key entirely and set the `TOKEN` environment variable when running to avoid putting credentials in the configuration file.
+You can omit the `token` key entirely and set the `TOKEN` environment variable when running to avoid putting credentials in the configuration file. Client tokens will be validated to match the one configured unless `validate_token` is set to `false`.
 
 By default, the total shard count will be calculated using the `/api/gateway/bot` endpoint. If you want to change this, set `shards` to the amount of shards. It will also launch all shards by default, you can customize this to launch only a range of shards using `shard_start` and `shard_end` (start inclusive, end exclusive).
 

src/config.rs

@@ -36,6 +36,8 @@ pub struct Config {
     pub status: Status,
     #[serde(default = "default_backpressure")]
     pub backpressure: usize,
+    #[serde(default = "default_validate_token")]
+    pub validate_token: bool,
     #[serde(default)]
     pub twilight_http_proxy: Option<String>,
     pub externally_accessible_url: String,
@@ -199,6 +201,10 @@ const fn default_backpressure() -> usize {
     100
 }
 
+const fn default_validate_token() -> bool {
+    true
+}
+
 pub enum Error {
     InvalidConfig(JsonError),
     NotFound(String),

src/server.rs

@@ -258,7 +258,9 @@ pub async fn handle_client<S: 'static + AsyncRead + AsyncWrite + Unpin + Send>(
                 }
 
                 // Discord tokens may be prefixed by 'Bot ' in IDENTIFY
-                if identify.d.token.split_whitespace().last() != Some(&CONFIG.token) {
+                if CONFIG.validate_token
+                    && identify.d.token.split_whitespace().last() != Some(&CONFIG.token)
+                {
                     warn!("[{addr}] Token from client mismatched, disconnecting");
                     break;
                 }
@@ -305,7 +307,9 @@ pub async fn handle_client<S: 'static + AsyncRead + AsyncWrite + Unpin + Send>(
                 };
 
                 // Discord tokens may be prefixed by 'Bot ' in RESUME
-                if resume.d.token.split_whitespace().last() != Some(&CONFIG.token) {
+                if CONFIG.validate_token
+                    && resume.d.token.split_whitespace().last() != Some(&CONFIG.token)
+                {
                     warn!("[{addr}] Token from client mismatched, disconnecting");
                     break;
                 }