canonicalize relay urls to avoid false duplicates

Cargo.lock

@@ -1271,6 +1271,7 @@ dependencies = [
  "serde_derive",
  "serde_json",
  "tracing",
+ "url",
 ]
 
 [[package]]

enostr/Cargo.toml

@@ -15,3 +15,4 @@ nostrdb = { git = "https://github.com/damus-io/nostrdb-rs", rev = "9bbafd8a2e904
 hex = "0.4.3"
 tracing = "0.1.40"
 env_logger = "0.11.1"
+url = "2.5.2"

enostr/src/relay/pool.rs

@@ -4,6 +4,8 @@ use nostrdb::Filter;
 
 use std::time::{Duration, Instant};
 
+use url::Url;
+
 #[cfg(not(target_arch = "wasm32"))]
 use ewebsock::{WsEvent, WsMessage};
 
@@ -152,6 +154,7 @@ impl RelayPool {
         url: String,
         wakeup: impl Fn() + Send + Sync + Clone + 'static,
     ) -> Result<()> {
+        let url = Self::canonicalize_url(url);
         // Check if the URL already exists in the pool.
         if self.has(&url) {
             return Ok(());
@@ -164,6 +167,14 @@ impl RelayPool {
         Ok(())
     }
 
+    // standardize the format (ie, trailing slashes)
+    fn canonicalize_url(url: String) -> String {
+        match Url::parse(&url) {
+            Ok(parsed_url) => parsed_url.to_string(),
+            Err(_) => url, // If parsing fails, return the original URL.
+        }
+    }
+
     /// Attempts to receive a pool event from a list of relays. The
     /// function searches each relay in the list in order, attempting to
     /// receive a message from each. If a message is received, return it.